<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.8.4"/>
<title>WCSLIB 4.18: wcs.h Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">WCSLIB 4.18
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.4 -->
<div id="navrow1" class="tabs">
<ul class="tablist">
<li><a href="index.html"><span>Main Page</span></a></li>
<li><a href="pages.html"><span>Related Pages</span></a></li>
<li><a href="annotated.html"><span>Data Structures</span></a></li>
<li class="current"><a href="files.html"><span>Files</span></a></li>
</ul>
</div>
<div id="navrow2" class="tabs2">
<ul class="tablist">
<li><a href="files.html"><span>File List</span></a></li>
<li><a href="globals.html"><span>Globals</span></a></li>
</ul>
</div>
<div id="nav-path" class="navpath">
<ul>
<li class="navelem"><a class="el" href="dir_af99bb3c152a306abd27951285ad1127.html">C</a></li> </ul>
</div>
</div><!-- top -->
<div class="header">
<div class="headertitle">
<div class="title">wcs.h</div> </div>
</div><!--header-->
<div class="contents">
<a href="wcs_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*============================================================================</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"></span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> WCSLIB 4.18 - an implementation of the FITS WCS standard.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> Copyright (C) 1995-2013, Mark Calabretta</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"></span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> This file is part of WCSLIB.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"></span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> WCSLIB is free software: you can redistribute it and/or modify it under the</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> terms of the GNU Lesser General Public License as published by the Free</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> Software Foundation, either version 3 of the License, or (at your option)</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> any later version.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"></span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> WCSLIB is distributed in the hope that it will be useful, but WITHOUT ANY</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> more details.</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"></span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> You should have received a copy of the GNU Lesser General Public License</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> along with WCSLIB. If not, see http://www.gnu.org/licenses.</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"></span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> Direct correspondence concerning WCSLIB to mark@calabretta.id.au</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"></span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> Author: Mark Calabretta, Australia Telescope National Facility, CSIRO.</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> http://www.atnf.csiro.au/people/Mark.Calabretta</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> $Id: wcs.h,v 4.18 2013/07/13 10:00:04 mcalabre Exp $</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">*=============================================================================</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">*</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">* WCSLIB 4.18 - C routines that implement the FITS World Coordinate System</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">* (WCS) standard. Refer to</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">*</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">* "Representations of world coordinates in FITS",</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">* Greisen, E.W., & Calabretta, M.R. 2002, A&A, 395, 1061 (Paper I)</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">*</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">* "Representations of celestial coordinates in FITS",</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">* Calabretta, M.R., & Greisen, E.W. 2002, A&A, 395, 1077 (Paper II)</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">*</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">* "Representations of spectral coordinates in FITS",</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">* Greisen, E.W., Calabretta, M.R., Valdes, F.G., & Allen, S.L.</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">* 2006, A&A, 446, 747 (Paper III)</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment">*</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">* Refer to the README file provided with WCSLIB for an overview of the</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">* library.</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">*</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">*</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">* Summary of the wcs routines</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">* ---------------------------</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">* These routines implement the FITS World Coordinate System (WCS) standard</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">* which defines methods to be used for computing world coordinates from image</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">* pixel coordinates, and vice versa. They are based on the wcsprm struct</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">* which contains all information needed for the computations. The struct</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">* contains some members that must be set by the user, and others that are</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">* maintained by these routines, somewhat like a C++ class but with no</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">* encapsulation.</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment">*</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment">* Three routines, wcsini(), wcssub(), and wcsfree() are provided to manage the</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment">* wcsprm struct and another, wcsprt(), to prints its contents. Refer to the</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment">* description of the wcsprm struct for an explanation of the anticipated usage</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment">* of these routines. wcscopy(), which does a deep copy of one wcsprm struct</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment">* to another, is defined as a preprocessor macro function that invokes</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">* wcssub().</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment">*</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment">* wcsperr() prints the error message(s) (if any) stored in a wcsprm struct,</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment">* and the linprm, celprm, prjprm, spcprm, and tabprm structs that it contains.</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment">*</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment">* A setup routine, wcsset(), computes intermediate values in the wcsprm struct</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment">* from parameters in it that were supplied by the user. The struct always</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment">* needs to be set up by wcsset() but this need not be called explicitly -</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment">* refer to the explanation of wcsprm::flag.</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment">*</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment">* wcsp2s() and wcss2p() implement the WCS world coordinate transformations.</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment">* In fact, they are high level driver routines for the WCS linear,</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment">* logarithmic, celestial, spectral and tabular transformation routines</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment">* described in lin.h, log.h, cel.h, spc.h and tab.h.</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment">*</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment">* Given either the celestial longitude or latitude plus an element of the</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">* pixel coordinate a hybrid routine, wcsmix(), iteratively solves for the</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment">* unknown elements.</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment">*</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment">* wcssptr() translates the spectral axis in a wcsprm struct. For example, a</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment">* 'FREQ' axis may be translated into 'ZOPT-F2W' and vice versa.</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment">*</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment">* Quadcube projections:</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment">* ---------------------</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment">* The quadcube projections (TSC, CSC, QSC) may be represented in FITS in</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment">* either of two ways:</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment">*</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment">* a: The six faces may be laid out in one plane and numbered as follows:</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment">*</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment">= 0</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment">=</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment">= 4 3 2 1 4 3 2</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment">=</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment">= 5</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment">*</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment">* Faces 2, 3 and 4 may appear on one side or the other (or both). The</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment">* world-to-pixel routines map faces 2, 3 and 4 to the left but the</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment">* pixel-to-world routines accept them on either side.</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment">*</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment">* b: The "COBE" convention in which the six faces are stored in a</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">* three-dimensional structure using a CUBEFACE axis indexed from</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment">* 0 to 5 as above.</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment">*</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment">* These routines support both methods; wcsset() determines which is being</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment">* used by the presence or absence of a CUBEFACE axis in ctype[]. wcsp2s()</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment">* and wcss2p() translate the CUBEFACE axis representation to the single</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment">* plane representation understood by the lower-level WCSLIB projection</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment">* routines.</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment">*</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment">*</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment">* wcsini() - Default constructor for the wcsprm struct</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment">* ----------------------------------------------------</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment">* wcsini() optionally allocates memory for arrays in a wcsprm struct and sets</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment">* all members of the struct to default values. Memory is allocated for up to</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment">* NPVMAX PVi_ma keywords or NPSMAX PSi_ma keywords per WCS representation.</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment">* These may be changed via wcsnpv() and wcsnps() before wcsini() is called.</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment">*</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment">* PLEASE NOTE: every wcsprm struct should be initialized by wcsini(), possibly</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment">* repeatedly. On the first invokation, and only the first invokation,</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment">* wcsprm::flag must be set to -1 to initialize memory management, regardless</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment">* of whether wcsini() will actually be used to allocate memory.</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment">*</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment">* Given:</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment">* alloc int If true, allocate memory unconditionally for the</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment">* crpix, etc. arrays.</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment">*</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment">* If false, it is assumed that pointers to these arrays</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment">* have been set by the user except if they are null</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment">* pointers in which case memory will be allocated for</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment">* them regardless. (In other words, setting alloc true</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment">* saves having to initalize these pointers to zero.)</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment">*</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment">* naxis int The number of world coordinate axes. This is used to</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment">* determine the length of the various wcsprm vectors and</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment">* matrices and therefore the amount of memory to</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment">* allocate for them.</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment">*</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment">* Given and returned:</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment">* wcs struct wcsprm*</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment">* Coordinate transformation parameters.</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment">*</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="comment">* Note that, in order to initialize memory management,</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="comment">* wcsprm::flag should be set to -1 when wcs is</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="comment">* initialized for the first time (memory leaks may</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment">* result if it had already been initialized).</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment">*</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment">* Function return value:</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment">* int Status return value:</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment">* 0: Success.</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment">* 2: Memory allocation failed.</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment">*</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment">* For returns > 1, a detailed error message is set in</span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment">* wcsprm::err if enabled, see wcserr_enable().</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment">*</span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment">*</span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment">* wcsnpv() - Memory allocation for PVi_ma</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment">* ---------------------------------------</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment">* wcsnpv() changes the value of NPVMAX (default 64). This global variable</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment">* controls the number of PVi_ma keywords that wcsini() should allocate space</span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment">* for.</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment">*</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment">* PLEASE NOTE: This function is not thread-safe.</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comment">*</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment">* Given:</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment">* n int Value of NPVMAX; ignored if < 0.</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment">*</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="comment">* Function return value:</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment">* int Current value of NPVMAX.</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment">*</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment">*</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment">* wcsnps() - Memory allocation for PSi_ma</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment">* ---------------------------------------</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment">* wcsnps() changes the values of NPSMAX (default 8). This global variable</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment">* controls the number of PSi_ma keywords that wcsini() should allocate space</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment">* for.</span></div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment">*</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment">* PLEASE NOTE: This function is not thread-safe.</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment">*</span></div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment">* Given:</span></div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment">* n int Value of NPSMAX; ignored if < 0.</span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment">*</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment">* Function return value:</span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment">* int Current value of NPSMAX.</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="comment">*</span></div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment">*</span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment">* wcssub() - Subimage extraction routine for the wcsprm struct</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment">* ------------------------------------------------------------</span></div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment">* wcssub() extracts the coordinate description for a subimage from a wcsprm</span></div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="comment">* struct. It does a deep copy, using wcsini() to allocate memory for its</span></div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="comment">* arrays if required. Only the "information to be provided" part of the</span></div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="comment">* struct is extracted; a call to wcsset() is required to set up the remainder.</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="comment">*</span></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="comment">* The world coordinate system of the subimage must be separable in the sense</span></div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="comment">* that the world coordinates at any point in the subimage must depend only on</span></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="comment">* the pixel coordinates of the axes extracted. In practice, this means that</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="comment">* the PCi_ja matrix of the original image must not contain non-zero</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment">* off-diagonal terms that associate any of the subimage axes with any of the</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="comment">* non-subimage axes.</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment">*</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment">* Note that while the required elements of the tabprm array are extracted, the</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment">* wtbarr array is not. (Thus it is not appropriate to call wcssub() after</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment">* wcstab() but before filling the tabprm structs - refer to wcshdr.h.)</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="comment">*</span></div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="comment">* wcssub() can also add axes to a wcsprm struct. The new axes will be created</span></div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="comment">* using the defaults set by wcsini() which produce a simple, unnamed, linear</span></div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="comment">* axis with world coordinate equal to the pixel coordinate. These default</span></div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="comment">* values can be changed in before invoking wcsset().</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="comment">*</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="comment">* Given:</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="comment">* alloc int If true, allocate memory for the crpix, etc. arrays in</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="comment">* the destination. Otherwise, it is assumed that</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="comment">* pointers to these arrays have been set by the user</span></div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="comment">* except if they are null pointers in which case memory</span></div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="comment">* will be allocated for them regardless.</span></div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="comment">*</span></div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="comment">* wcssrc const struct wcsprm*</span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <span class="comment">* Struct to extract from.</span></div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="comment">*</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="comment">* Given and returned:</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment">* nsub int*</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="comment">* axes int[] Vector of length *nsub containing the image axis</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment">* numbers (1-relative) to extract. Order is</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="comment">* significant; axes[0] is the axis number of the input</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment">* image that corresponds to the first axis in the</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment">* subimage, etc.</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment">*</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment">* Use an axis number of 0 to create a new axis using</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment">* the defaults set by wcsini().</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment">*</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment">* nsub (the pointer) may be set to zero, and so also may</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment">* nsub, to indicate the number of axes in the input</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment">* image; the number of axes will be returned if</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment">* nsub != 0x0. axes itself (the pointer) may be set to</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment">* zero to indicate the first *nsub axes in their</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment">* original order.</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment">*</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment">* Set both nsub and axes to zero to do a deep copy of</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="comment">* one wcsprm struct to another.</span></div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="comment">*</span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="comment">* Subimage extraction by coordinate axis type may be</span></div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="comment">* done by setting the elements of axes[] to the</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="comment">* following special preprocessor macro values:</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="comment">*</span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="comment">* WCSSUB_LONGITUDE: Celestial longitude.</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment">* WCSSUB_LATITUDE: Celestial latitude.</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="comment">* WCSSUB_CUBEFACE: Quadcube CUBEFACE axis.</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="comment">* WCSSUB_SPECTRAL: Spectral axis.</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="comment">* WCSSUB_STOKES: Stokes axis.</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="comment">*</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="comment">* Refer to the notes (below) for further usage examples.</span></div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="comment">*</span></div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="comment">* On return, *nsub will contain the number of axes in</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="comment">* the subimage; this may be zero if there were no axes</span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="comment">* of the required type(s) (in which case no memory will</span></div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="comment">* be allocated). axes[] will contain the axis numbers</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="comment">* that were extracted, or 0 for newly created axes. The</span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="comment">* vector length must be sufficient to contain all axis</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="comment">* numbers. No checks are performed to verify that the</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="comment">* coordinate axes are consistent, this is done by</span></div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span> <span class="comment">* wcsset().</span></div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="comment">*</span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> <span class="comment">* wcsdst struct wcsprm*</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> <span class="comment">* Struct describing the subimage. wcsprm::flag should</span></div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="comment">* be set to -1 if wcsdst was not previously initialized</span></div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment">* (memory leaks may result if it was previously</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment">* initialized).</span></div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="comment">*</span></div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="comment">* Function return value:</span></div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> <span class="comment">* int Status return value:</span></div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="comment">* 0: Success.</span></div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="comment">* 2: Memory allocation failed.</span></div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="comment">* 12: Invalid subimage specification.</span></div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="comment">* 13: Non-separable subimage coordinate system.</span></div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="comment">*</span></div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> <span class="comment">* For returns > 1, a detailed error message is set in</span></div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> <span class="comment">* wcsprm::err if enabled, see wcserr_enable().</span></div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> <span class="comment">*</span></div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> <span class="comment">* Notes:</span></div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> <span class="comment">* Combinations of subimage axes of particular types may be extracted in the</span></div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="comment">* same order as they occur in the input image by combining preprocessor</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="comment">* codes, for example</span></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="comment">*</span></div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="comment">= *nsub = 1;</span></div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="comment">= axes[0] = WCSSUB_LONGITUDE | WCSSUB_LATITUDE | WCSSUB_SPECTRAL;</span></div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span> <span class="comment">*</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> <span class="comment">* would extract the longitude, latitude, and spectral axes in the same order</span></div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="comment">* as the input image. If one of each were present, *nsub = 3 would be</span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> <span class="comment">* returned.</span></div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="comment">*</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="comment">* For convenience, WCSSUB_CELESTIAL is defined as the combination</span></div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="comment">* WCSSUB_LONGITUDE | WCSSUB_LATITUDE | WCSSUB_CUBEFACE.</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="comment">*</span></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="comment">* The codes may also be negated to extract all but the types specified, for</span></div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="comment">* example</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="comment">*</span></div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> <span class="comment">= *nsub = 4;</span></div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> <span class="comment">= axes[0] = WCSSUB_LONGITUDE;</span></div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> <span class="comment">= axes[1] = WCSSUB_LATITUDE;</span></div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> <span class="comment">= axes[2] = WCSSUB_CUBEFACE;</span></div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="comment">= axes[3] = -(WCSSUB_SPECTRAL | WCSSUB_STOKES);</span></div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> <span class="comment">*</span></div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span> <span class="comment">* The last of these specifies all axis types other than spectral or Stokes.</span></div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> <span class="comment">* Extraction is done in the order specified by axes[] a longitude axis (if</span></div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span> <span class="comment">* present) would be extracted first (via axes[0]) and not subsequently (via</span></div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span> <span class="comment">* axes[3]). Likewise for the latitude and cubeface axes in this example.</span></div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span> <span class="comment">*</span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span> <span class="comment">* From the foregoing, it is apparent that the value of *nsub returned may be</span></div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> <span class="comment">* less than or greater than that given. However, it will never exceed the</span></div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="comment">* number of axes in the input image (plus the number of newly-created axes</span></div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span> <span class="comment">* if any were specified on input).</span></div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> <span class="comment">*</span></div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span> <span class="comment">*</span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span> <span class="comment">* wcscopy() macro - Copy routine for the wcsprm struct</span></div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="comment">* ----------------------------------------------------</span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="comment">* wcscopy() does a deep copy of one wcsprm struct to another. As of</span></div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="comment">* WCSLIB 3.6, it is implemented as a preprocessor macro that invokes</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="comment">* wcssub() with the nsub and axes pointers both set to zero.</span></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="comment">*</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="comment">*</span></div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span> <span class="comment">* wcsfree() - Destructor for the wcsprm struct</span></div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> <span class="comment">* --------------------------------------------</span></div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> <span class="comment">* wcsfree() frees memory allocated for the wcsprm arrays by wcsini() and/or</span></div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> <span class="comment">* wcsset(). wcsini() records the memory it allocates and wcsfree() will only</span></div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> <span class="comment">* attempt to free this.</span></div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> <span class="comment">*</span></div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> <span class="comment">* PLEASE NOTE: wcsfree() must not be invoked on a wcsprm struct that was not</span></div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> <span class="comment">* initialized by wcsini().</span></div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> <span class="comment">*</span></div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span> <span class="comment">* Returned:</span></div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> <span class="comment">* wcs struct wcsprm*</span></div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span> <span class="comment">* Coordinate transformation parameters.</span></div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span> <span class="comment">*</span></div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> <span class="comment">* Function return value:</span></div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span> <span class="comment">* int Status return value:</span></div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span> <span class="comment">* 0: Success.</span></div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span> <span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> <span class="comment">*</span></div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="comment">*</span></div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="comment">* wcsprt() - Print routine for the wcsprm struct</span></div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span> <span class="comment">* ----------------------------------------------</span></div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span> <span class="comment">* wcsprt() prints the contents of a wcsprm struct using wcsprintf(). Mainly</span></div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="comment">* intended for diagnostic purposes.</span></div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> <span class="comment">*</span></div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span> <span class="comment">* Given:</span></div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> <span class="comment">* wcs const struct wcsprm*</span></div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> <span class="comment">* Coordinate transformation parameters.</span></div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="comment">*</span></div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span> <span class="comment">* Function return value:</span></div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <span class="comment">* int Status return value:</span></div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span> <span class="comment">* 0: Success.</span></div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span> <span class="comment">*</span></div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="comment">*</span></div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span> <span class="comment">* wcsperr() - Print error messages from a wcsprm struct</span></div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="comment">* -----------------------------------------------------</span></div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="comment">* wcsperr() prints the error message(s), if any, stored in a wcsprm struct,</span></div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="comment">* and the linprm, celprm, prjprm, spcprm, and tabprm structs that it contains.</span></div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> <span class="comment">* If there are no errors then nothing is printed. It uses wcserr_prt(), q.v.</span></div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="comment">*</span></div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="comment">* Given:</span></div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span> <span class="comment">* wcs const struct wcsprm*</span></div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span> <span class="comment">* Coordinate transformation parameters.</span></div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span> <span class="comment">*</span></div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span> <span class="comment">* prefix const char *</span></div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span> <span class="comment">* If non-NULL, each output line will be prefixed with</span></div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span> <span class="comment">* this string.</span></div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span> <span class="comment">*</span></div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span> <span class="comment">* Function return value:</span></div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span> <span class="comment">* int Status return value:</span></div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> <span class="comment">* 0: Success.</span></div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> <span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> <span class="comment">*</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span> <span class="comment">*</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span> <span class="comment">* wcsset() - Setup routine for the wcsprm struct</span></div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span> <span class="comment">* ----------------------------------------------</span></div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span> <span class="comment">* wcsset() sets up a wcsprm struct according to information supplied within</span></div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span> <span class="comment">* it (refer to the description of the wcsprm struct).</span></div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span> <span class="comment">*</span></div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span> <span class="comment">* wcsset() recognizes the NCP projection and converts it to the equivalent SIN</span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span> <span class="comment">* projection and likewise translates GLS into SFL. It also translates the</span></div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> <span class="comment">* AIPS spectral types ('FREQ-LSR', 'FELO-HEL', etc.), possibly changing the</span></div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span> <span class="comment">* input header keywords wcsprm::ctype and/or wcsprm::specsys if necessary.</span></div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span> <span class="comment">*</span></div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span> <span class="comment">* Note that this routine need not be called directly; it will be invoked by</span></div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span> <span class="comment">* wcsp2s() and wcss2p() if the wcsprm::flag is anything other than a</span></div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span> <span class="comment">* predefined magic value.</span></div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> <span class="comment">*</span></div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> <span class="comment">* Given and returned:</span></div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="comment">* wcs struct wcsprm*</span></div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="comment">* Coordinate transformation parameters.</span></div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="comment">*</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span> <span class="comment">* Function return value:</span></div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span> <span class="comment">* int Status return value:</span></div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="comment">* 0: Success.</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span> <span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span> <span class="comment">* 2: Memory allocation failed.</span></div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span> <span class="comment">* 3: Linear transformation matrix is singular.</span></div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="comment">* 4: Inconsistent or unrecognized coordinate axis</span></div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span> <span class="comment">* types.</span></div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="comment">* 5: Invalid parameter value.</span></div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span> <span class="comment">* 6: Invalid coordinate transformation parameters.</span></div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span> <span class="comment">* 7: Ill-conditioned coordinate transformation</span></div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span> <span class="comment">* parameters.</span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span> <span class="comment">*</span></div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="comment">* For returns > 1, a detailed error message is set in</span></div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span> <span class="comment">* wcsprm::err if enabled, see wcserr_enable().</span></div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span> <span class="comment">*</span></div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span> <span class="comment">*</span></div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span> <span class="comment">* wcsp2s() - Pixel-to-world transformation</span></div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span> <span class="comment">* ----------------------------------------</span></div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span> <span class="comment">* wcsp2s() transforms pixel coordinates to world coordinates.</span></div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span> <span class="comment">*</span></div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span> <span class="comment">* Given and returned:</span></div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span> <span class="comment">* wcs struct wcsprm*</span></div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span> <span class="comment">* Coordinate transformation parameters.</span></div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span> <span class="comment">*</span></div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span> <span class="comment">* Given:</span></div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span> <span class="comment">* ncoord,</span></div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span> <span class="comment">* nelem int The number of coordinates, each of vector length</span></div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="comment">* nelem but containing wcs.naxis coordinate elements.</span></div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> <span class="comment">* Thus nelem must equal or exceed the value of the</span></div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span> <span class="comment">* NAXIS keyword unless ncoord == 1, in which case nelem</span></div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span> <span class="comment">* is not used.</span></div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span> <span class="comment">*</span></div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span> <span class="comment">* pixcrd const double[ncoord][nelem]</span></div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span> <span class="comment">* Array of pixel coordinates.</span></div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span> <span class="comment">*</span></div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span> <span class="comment">* Returned:</span></div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span> <span class="comment">* imgcrd double[ncoord][nelem]</span></div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span> <span class="comment">* Array of intermediate world coordinates. For</span></div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span> <span class="comment">* celestial axes, imgcrd[][wcs.lng] and</span></div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span> <span class="comment">* imgcrd[][wcs.lat] are the projected x-, and</span></div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span> <span class="comment">* y-coordinates in pseudo "degrees". For spectral</span></div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span> <span class="comment">* axes, imgcrd[][wcs.spec] is the intermediate spectral</span></div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span> <span class="comment">* coordinate, in SI units.</span></div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span> <span class="comment">*</span></div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span> <span class="comment">* phi,theta double[ncoord]</span></div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> <span class="comment">* Longitude and latitude in the native coordinate system</span></div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span> <span class="comment">* of the projection [deg].</span></div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span> <span class="comment">*</span></div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span> <span class="comment">* world double[ncoord][nelem]</span></div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span> <span class="comment">* Array of world coordinates. For celestial axes,</span></div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span> <span class="comment">* world[][wcs.lng] and world[][wcs.lat] are the</span></div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span> <span class="comment">* celestial longitude and latitude [deg]. For</span></div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span> <span class="comment">* spectral axes, imgcrd[][wcs.spec] is the intermediate</span></div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span> <span class="comment">* spectral coordinate, in SI units.</span></div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span> <span class="comment">*</span></div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span> <span class="comment">* stat int[ncoord]</span></div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span> <span class="comment">* Status return value for each coordinate:</span></div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span> <span class="comment">* 0: Success.</span></div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span> <span class="comment">* 1+: A bit mask indicating invalid pixel coordinate</span></div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span> <span class="comment">* element(s).</span></div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span> <span class="comment">*</span></div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span> <span class="comment">* Function return value:</span></div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span> <span class="comment">* int Status return value:</span></div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span> <span class="comment">* 0: Success.</span></div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span> <span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span> <span class="comment">* 2: Memory allocation failed.</span></div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span> <span class="comment">* 3: Linear transformation matrix is singular.</span></div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span> <span class="comment">* 4: Inconsistent or unrecognized coordinate axis</span></div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span> <span class="comment">* types.</span></div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span> <span class="comment">* 5: Invalid parameter value.</span></div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span> <span class="comment">* 6: Invalid coordinate transformation parameters.</span></div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span> <span class="comment">* 7: Ill-conditioned coordinate transformation</span></div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span> <span class="comment">* parameters.</span></div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span> <span class="comment">* 8: One or more of the pixel coordinates were</span></div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span> <span class="comment">* invalid, as indicated by the stat vector.</span></div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span> <span class="comment">*</span></div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span> <span class="comment">* For returns > 1, a detailed error message is set in</span></div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span> <span class="comment">* wcsprm::err if enabled, see wcserr_enable().</span></div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span> <span class="comment">*</span></div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span> <span class="comment">*</span></div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span> <span class="comment">* wcss2p() - World-to-pixel transformation</span></div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span> <span class="comment">* ----------------------------------------</span></div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span> <span class="comment">* wcss2p() transforms world coordinates to pixel coordinates.</span></div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span> <span class="comment">*</span></div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span> <span class="comment">* Given and returned:</span></div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span> <span class="comment">* wcs struct wcsprm*</span></div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span> <span class="comment">* Coordinate transformation parameters.</span></div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span> <span class="comment">*</span></div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span> <span class="comment">* Given:</span></div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span> <span class="comment">* ncoord,</span></div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span> <span class="comment">* nelem int The number of coordinates, each of vector length nelem</span></div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span> <span class="comment">* but containing wcs.naxis coordinate elements. Thus</span></div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span> <span class="comment">* nelem must equal or exceed the value of the NAXIS</span></div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span> <span class="comment">* keyword unless ncoord == 1, in which case nelem is not</span></div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span> <span class="comment">* used.</span></div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span> <span class="comment">*</span></div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span> <span class="comment">* world const double[ncoord][nelem]</span></div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span> <span class="comment">* Array of world coordinates. For celestial axes,</span></div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span> <span class="comment">* world[][wcs.lng] and world[][wcs.lat] are the</span></div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span> <span class="comment">* celestial longitude and latitude [deg]. For spectral</span></div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span> <span class="comment">* axes, world[][wcs.spec] is the spectral coordinate, in</span></div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> <span class="comment">* SI units.</span></div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span> <span class="comment">*</span></div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> <span class="comment">* Returned:</span></div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span> <span class="comment">* phi,theta double[ncoord]</span></div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span> <span class="comment">* Longitude and latitude in the native coordinate</span></div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span> <span class="comment">* system of the projection [deg].</span></div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span> <span class="comment">*</span></div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span> <span class="comment">* imgcrd double[ncoord][nelem]</span></div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span> <span class="comment">* Array of intermediate world coordinates. For</span></div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span> <span class="comment">* celestial axes, imgcrd[][wcs.lng] and</span></div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span> <span class="comment">* imgcrd[][wcs.lat] are the projected x-, and</span></div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span> <span class="comment">* y-coordinates in pseudo "degrees". For quadcube</span></div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span> <span class="comment">* projections with a CUBEFACE axis the face number is</span></div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span> <span class="comment">* also returned in imgcrd[][wcs.cubeface]. For</span></div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span> <span class="comment">* spectral axes, imgcrd[][wcs.spec] is the intermediate</span></div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span> <span class="comment">* spectral coordinate, in SI units.</span></div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span> <span class="comment">*</span></div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span> <span class="comment">* pixcrd double[ncoord][nelem]</span></div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span> <span class="comment">* Array of pixel coordinates.</span></div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span> <span class="comment">*</span></div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span> <span class="comment">* stat int[ncoord]</span></div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span> <span class="comment">* Status return value for each coordinate:</span></div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span> <span class="comment">* 0: Success.</span></div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span> <span class="comment">* 1+: A bit mask indicating invalid world coordinate</span></div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span> <span class="comment">* element(s).</span></div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span> <span class="comment">*</span></div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span> <span class="comment">* Function return value:</span></div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span> <span class="comment">* int Status return value:</span></div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span> <span class="comment">* 0: Success.</span></div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span> <span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span> <span class="comment">* 2: Memory allocation failed.</span></div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span> <span class="comment">* 3: Linear transformation matrix is singular.</span></div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span> <span class="comment">* 4: Inconsistent or unrecognized coordinate axis</span></div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span> <span class="comment">* types.</span></div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span> <span class="comment">* 5: Invalid parameter value.</span></div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span> <span class="comment">* 6: Invalid coordinate transformation parameters.</span></div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span> <span class="comment">* 7: Ill-conditioned coordinate transformation</span></div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span> <span class="comment">* parameters.</span></div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span> <span class="comment">* 9: One or more of the world coordinates were</span></div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span> <span class="comment">* invalid, as indicated by the stat vector.</span></div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span> <span class="comment">*</span></div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span> <span class="comment">* For returns > 1, a detailed error message is set in</span></div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span> <span class="comment">* wcsprm::err if enabled, see wcserr_enable().</span></div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span> <span class="comment">*</span></div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span> <span class="comment">*</span></div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span> <span class="comment">* wcsmix() - Hybrid coordinate transformation</span></div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span> <span class="comment">* -------------------------------------------</span></div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span> <span class="comment">* wcsmix(), given either the celestial longitude or latitude plus an element</span></div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span> <span class="comment">* of the pixel coordinate, solves for the remaining elements by iterating on</span></div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span> <span class="comment">* the unknown celestial coordinate element using wcss2p(). Refer also to the</span></div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span> <span class="comment">* notes below.</span></div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span> <span class="comment">*</span></div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span> <span class="comment">* Given and returned:</span></div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span> <span class="comment">* wcs struct wcsprm*</span></div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span> <span class="comment">* Indices for the celestial coordinates obtained</span></div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span> <span class="comment">* by parsing the wcsprm::ctype[].</span></div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span> <span class="comment">*</span></div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span> <span class="comment">* Given:</span></div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span> <span class="comment">* mixpix int Which element of the pixel coordinate is given.</span></div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span> <span class="comment">*</span></div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span> <span class="comment">* mixcel int Which element of the celestial coordinate is given:</span></div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span> <span class="comment">* 1: Celestial longitude is given in</span></div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span> <span class="comment">* world[wcs.lng], latitude returned in</span></div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span> <span class="comment">* world[wcs.lat].</span></div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span> <span class="comment">* 2: Celestial latitude is given in</span></div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span> <span class="comment">* world[wcs.lat], longitude returned in</span></div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span> <span class="comment">* world[wcs.lng].</span></div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span> <span class="comment">*</span></div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span> <span class="comment">* vspan const double[2]</span></div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span> <span class="comment">* Solution interval for the celestial coordinate [deg].</span></div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span> <span class="comment">* The ordering of the two limits is irrelevant.</span></div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span> <span class="comment">* Longitude ranges may be specified with any convenient</span></div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span> <span class="comment">* normalization, for example [-120,+120] is the same as</span></div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span> <span class="comment">* [240,480], except that the solution will be returned</span></div>
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span> <span class="comment">* with the same normalization, i.e. lie within the</span></div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span> <span class="comment">* interval specified.</span></div>
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span> <span class="comment">*</span></div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span> <span class="comment">* vstep const double</span></div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span> <span class="comment">* Step size for solution search [deg]. If zero, a</span></div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span> <span class="comment">* sensible, although perhaps non-optimal default will be</span></div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span> <span class="comment">* used.</span></div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span> <span class="comment">*</span></div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span> <span class="comment">* viter int If a solution is not found then the step size will be</span></div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span> <span class="comment">* halved and the search recommenced. viter controls how</span></div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span> <span class="comment">* many times the step size is halved. The allowed range</span></div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span> <span class="comment">* is 5 - 10.</span></div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span> <span class="comment">*</span></div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span> <span class="comment">* Given and returned:</span></div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span> <span class="comment">* world double[naxis]</span></div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span> <span class="comment">* World coordinate elements. world[wcs.lng] and</span></div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span> <span class="comment">* world[wcs.lat] are the celestial longitude and</span></div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span> <span class="comment">* latitude [deg]. Which is given and which returned</span></div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span> <span class="comment">* depends on the value of mixcel. All other elements</span></div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span> <span class="comment">* are given.</span></div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span> <span class="comment">*</span></div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span> <span class="comment">* Returned:</span></div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span> <span class="comment">* phi,theta double[naxis]</span></div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span> <span class="comment">* Longitude and latitude in the native coordinate</span></div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span> <span class="comment">* system of the projection [deg].</span></div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span> <span class="comment">*</span></div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span> <span class="comment">* imgcrd double[naxis]</span></div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span> <span class="comment">* Image coordinate elements. imgcrd[wcs.lng] and</span></div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span> <span class="comment">* imgcrd[wcs.lat] are the projected x-, and</span></div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span> <span class="comment">* y-coordinates in pseudo "degrees".</span></div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span> <span class="comment">*</span></div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span> <span class="comment">* Given and returned:</span></div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span> <span class="comment">* pixcrd double[naxis]</span></div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span> <span class="comment">* Pixel coordinate. The element indicated by mixpix is</span></div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span> <span class="comment">* given and the remaining elements are returned.</span></div>
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span> <span class="comment">*</span></div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span> <span class="comment">* Function return value:</span></div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span> <span class="comment">* int Status return value:</span></div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span> <span class="comment">* 0: Success.</span></div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span> <span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span> <span class="comment">* 2: Memory allocation failed.</span></div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span> <span class="comment">* 3: Linear transformation matrix is singular.</span></div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span> <span class="comment">* 4: Inconsistent or unrecognized coordinate axis</span></div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span> <span class="comment">* types.</span></div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span> <span class="comment">* 5: Invalid parameter value.</span></div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span> <span class="comment">* 6: Invalid coordinate transformation parameters.</span></div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span> <span class="comment">* 7: Ill-conditioned coordinate transformation</span></div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span> <span class="comment">* parameters.</span></div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span> <span class="comment">* 10: Invalid world coordinate.</span></div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span> <span class="comment">* 11: No solution found in the specified interval.</span></div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span> <span class="comment">*</span></div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span> <span class="comment">* For returns > 1, a detailed error message is set in</span></div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span> <span class="comment">* wcsprm::err if enabled, see wcserr_enable().</span></div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span> <span class="comment">*</span></div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span> <span class="comment">* Notes:</span></div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span> <span class="comment">* Initially the specified solution interval is checked to see if it's a</span></div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span> <span class="comment">* "crossing" interval. If it isn't, a search is made for a crossing</span></div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span> <span class="comment">* solution by iterating on the unknown celestial coordinate starting at the</span></div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span> <span class="comment">* upper limit of the solution interval and decrementing by the specified</span></div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span> <span class="comment">* step size. A crossing is indicated if the trial value of the pixel</span></div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span> <span class="comment">* coordinate steps through the value specified. If a crossing interval is</span></div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span> <span class="comment">* found then the solution is determined by a modified form of "regula falsi"</span></div>
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span> <span class="comment">* division of the crossing interval. If no crossing interval was found</span></div>
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span> <span class="comment">* within the specified solution interval then a search is made for a</span></div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span> <span class="comment">* "non-crossing" solution as may arise from a point of tangency. The</span></div>
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span> <span class="comment">* process is complicated by having to make allowance for the discontinuities</span></div>
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span> <span class="comment">* that occur in all map projections.</span></div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span> <span class="comment">*</span></div>
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span> <span class="comment">* Once one solution has been determined others may be found by subsequent</span></div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span> <span class="comment">* invokations of wcsmix() with suitably restricted solution intervals.</span></div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span> <span class="comment">*</span></div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span> <span class="comment">* Note the circumstance that arises when the solution point lies at a native</span></div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span> <span class="comment">* pole of a projection in which the pole is represented as a finite curve,</span></div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span> <span class="comment">* for example the zenithals and conics. In such cases two or more valid</span></div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span> <span class="comment">* solutions may exist but wcsmix() only ever returns one.</span></div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span> <span class="comment">*</span></div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span> <span class="comment">* Because of its generality wcsmix() is very compute-intensive. For</span></div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span> <span class="comment">* compute-limited applications more efficient special-case solvers could be</span></div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span> <span class="comment">* written for simple projections, for example non-oblique cylindrical</span></div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span> <span class="comment">* projections.</span></div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span> <span class="comment">*</span></div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span> <span class="comment">*</span></div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span> <span class="comment">* wcssptr() - Spectral axis translation</span></div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span> <span class="comment">* -------------------------------------</span></div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span> <span class="comment">* wcssptr() translates the spectral axis in a wcsprm struct. For example, a</span></div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span> <span class="comment">* 'FREQ' axis may be translated into 'ZOPT-F2W' and vice versa.</span></div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span> <span class="comment">*</span></div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span> <span class="comment">* Given and returned:</span></div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span> <span class="comment">* wcs struct wcsprm*</span></div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span> <span class="comment">* Coordinate transformation parameters.</span></div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span> <span class="comment">*</span></div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span> <span class="comment">* i int* Index of the spectral axis (0-relative). If given < 0</span></div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span> <span class="comment">* it will be set to the first spectral axis identified</span></div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span> <span class="comment">* from the ctype[] keyvalues in the wcsprm struct.</span></div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span> <span class="comment">*</span></div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span> <span class="comment">* ctype char[9] Desired spectral CTYPEia. Wildcarding may be used as</span></div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span> <span class="comment">* for the ctypeS2 argument to spctrn() as described in</span></div>
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span> <span class="comment">* the prologue of spc.h, i.e. if the final three</span></div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span> <span class="comment">* characters are specified as "???", or if just the</span></div>
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span> <span class="comment">* eighth character is specified as '?', the correct</span></div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span> <span class="comment">* algorithm code will be substituted and returned.</span></div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span> <span class="comment">*</span></div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span> <span class="comment">* Function return value:</span></div>
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span> <span class="comment">* int Status return value:</span></div>
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span> <span class="comment">* 0: Success.</span></div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span> <span class="comment">* 1: Null wcsprm pointer passed.</span></div>
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span> <span class="comment">* 2: Memory allocation failed.</span></div>
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span> <span class="comment">* 3: Linear transformation matrix is singular.</span></div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span> <span class="comment">* 4: Inconsistent or unrecognized coordinate axis</span></div>
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span> <span class="comment">* types.</span></div>
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span> <span class="comment">* 5: Invalid parameter value.</span></div>
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span> <span class="comment">* 6: Invalid coordinate transformation parameters.</span></div>
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span> <span class="comment">* 7: Ill-conditioned coordinate transformation</span></div>
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span> <span class="comment">* parameters.</span></div>
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span> <span class="comment">* 12: Invalid subimage specification (no spectral</span></div>
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span> <span class="comment">* axis).</span></div>
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span> <span class="comment">*</span></div>
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span> <span class="comment">* For returns > 1, a detailed error message is set in</span></div>
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span> <span class="comment">* wcsprm::err if enabled, see wcserr_enable().</span></div>
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span> <span class="comment">*</span></div>
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span> <span class="comment">*</span></div>
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span> <span class="comment">* wcsprm struct - Coordinate transformation parameters</span></div>
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span> <span class="comment">* ----------------------------------------------------</span></div>
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span> <span class="comment">* The wcsprm struct contains information required to transform world</span></div>
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span> <span class="comment">* coordinates. It consists of certain members that must be set by the user</span></div>
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span> <span class="comment">* ("given") and others that are set by the WCSLIB routines ("returned").</span></div>
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span> <span class="comment">* Some of the former are not actually required for transforming coordinates.</span></div>
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span> <span class="comment">* These are described as "auxiliary"; the struct simply provides a place to</span></div>
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span> <span class="comment">* store them, though they may be used by wcshdo() in constructing a FITS</span></div>
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span> <span class="comment">* header from a wcsprm struct. Some of the returned values are supplied for</span></div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span> <span class="comment">* informational purposes and others are for internal use only as indicated.</span></div>
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span> <span class="comment">*</span></div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span> <span class="comment">* In practice, it is expected that a WCS parser would scan the FITS header to</span></div>
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span> <span class="comment">* determine the number of coordinate axes. It would then use wcsini() to</span></div>
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span> <span class="comment">* allocate memory for arrays in the wcsprm struct and set default values.</span></div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span> <span class="comment">* Then as it reread the header and identified each WCS keyrecord it would load</span></div>
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span> <span class="comment">* the value into the relevant wcsprm array element. This is essentially what</span></div>
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span> <span class="comment">* wcspih() does - refer to the prologue of wcshdr.h. As the final step,</span></div>
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span> <span class="comment">* wcsset() is invoked, either directly or indirectly, to set the derived</span></div>
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span> <span class="comment">* members of the wcsprm struct. wcsset() strips off trailing blanks in all</span></div>
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span> <span class="comment">* string members and null-fills the character array.</span></div>
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span> <span class="comment">*</span></div>
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span> <span class="comment">* int flag</span></div>
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span> <span class="comment">* (Given and returned) This flag must be set to zero whenever any of the</span></div>
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span> <span class="comment">* following wcsprm struct members are set or changed:</span></div>
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span> <span class="comment">*</span></div>
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span> <span class="comment">* - wcsprm::naxis (q.v., not normally set by the user),</span></div>
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span> <span class="comment">* - wcsprm::crpix,</span></div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span> <span class="comment">* - wcsprm::pc,</span></div>
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span> <span class="comment">* - wcsprm::cdelt,</span></div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span> <span class="comment">* - wcsprm::crval,</span></div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span> <span class="comment">* - wcsprm::cunit,</span></div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span> <span class="comment">* - wcsprm::ctype,</span></div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span> <span class="comment">* - wcsprm::lonpole,</span></div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span> <span class="comment">* - wcsprm::latpole,</span></div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span> <span class="comment">* - wcsprm::restfrq,</span></div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span> <span class="comment">* - wcsprm::restwav,</span></div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span> <span class="comment">* - wcsprm::npv,</span></div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span> <span class="comment">* - wcsprm::pv,</span></div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span> <span class="comment">* - wcsprm::nps,</span></div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span> <span class="comment">* - wcsprm::ps,</span></div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span> <span class="comment">* - wcsprm::cd,</span></div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span> <span class="comment">* - wcsprm::crota,</span></div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span> <span class="comment">* - wcsprm::altlin.</span></div>
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span> <span class="comment">*</span></div>
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span> <span class="comment">* This signals the initialization routine, wcsset(), to recompute the</span></div>
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span> <span class="comment">* returned members of the celprm struct. celset() will reset flag to</span></div>
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span> <span class="comment">* indicate that this has been done.</span></div>
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span> <span class="comment">*</span></div>
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span> <span class="comment">* PLEASE NOTE: flag should be set to -1 when wcsini() is called for the</span></div>
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span> <span class="comment">* first time for a particular wcsprm struct in order to initialize memory</span></div>
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span> <span class="comment">* management. It must ONLY be used on the first initialization otherwise</span></div>
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span> <span class="comment">* memory leaks may result.</span></div>
<div class="line"><a name="l00742"></a><span class="lineno"> 742</span> <span class="comment">*</span></div>
<div class="line"><a name="l00743"></a><span class="lineno"> 743</span> <span class="comment">* int naxis</span></div>
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span> <span class="comment">* (Given or returned) Number of pixel and world coordinate elements.</span></div>
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span> <span class="comment">*</span></div>
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span> <span class="comment">* If wcsini() is used to initialize the linprm struct (as would normally</span></div>
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span> <span class="comment">* be the case) then it will set naxis from the value passed to it as a</span></div>
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span> <span class="comment">* function argument. The user should not subsequently modify it.</span></div>
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span> <span class="comment">*</span></div>
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span> <span class="comment">* double *crpix</span></div>
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span> <span class="comment">* (Given) Address of the first element of an array of double containing</span></div>
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span> <span class="comment">* the coordinate reference pixel, CRPIXja.</span></div>
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span> <span class="comment">*</span></div>
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span> <span class="comment">* double *pc</span></div>
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span> <span class="comment">* (Given) Address of the first element of the PCi_ja (pixel coordinate)</span></div>
<div class="line"><a name="l00756"></a><span class="lineno"> 756</span> <span class="comment">* transformation matrix. The expected order is</span></div>
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span> <span class="comment">*</span></div>
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span> <span class="comment">= struct wcsprm wcs;</span></div>
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span> <span class="comment">= wcs.pc = {PC1_1, PC1_2, PC2_1, PC2_2};</span></div>
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span> <span class="comment">*</span></div>
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span> <span class="comment">* This may be constructed conveniently from a 2-D array via</span></div>
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span> <span class="comment">*</span></div>
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span> <span class="comment">= double m[2][2] = {{PC1_1, PC1_2},</span></div>
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span> <span class="comment">= {PC2_1, PC2_2}};</span></div>
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span> <span class="comment">*</span></div>
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span> <span class="comment">* which is equivalent to</span></div>
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span> <span class="comment">*</span></div>
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span> <span class="comment">= double m[2][2];</span></div>
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span> <span class="comment">= m[0][0] = PC1_1;</span></div>
<div class="line"><a name="l00770"></a><span class="lineno"> 770</span> <span class="comment">= m[0][1] = PC1_2;</span></div>
<div class="line"><a name="l00771"></a><span class="lineno"> 771</span> <span class="comment">= m[1][0] = PC2_1;</span></div>
<div class="line"><a name="l00772"></a><span class="lineno"> 772</span> <span class="comment">= m[1][1] = PC2_2;</span></div>
<div class="line"><a name="l00773"></a><span class="lineno"> 773</span> <span class="comment">*</span></div>
<div class="line"><a name="l00774"></a><span class="lineno"> 774</span> <span class="comment">* The storage order for this 2-D array is the same as for the 1-D array,</span></div>
<div class="line"><a name="l00775"></a><span class="lineno"> 775</span> <span class="comment">* whence</span></div>
<div class="line"><a name="l00776"></a><span class="lineno"> 776</span> <span class="comment">*</span></div>
<div class="line"><a name="l00777"></a><span class="lineno"> 777</span> <span class="comment">= wcs.pc = *m;</span></div>
<div class="line"><a name="l00778"></a><span class="lineno"> 778</span> <span class="comment">*</span></div>
<div class="line"><a name="l00779"></a><span class="lineno"> 779</span> <span class="comment">* would be legitimate.</span></div>
<div class="line"><a name="l00780"></a><span class="lineno"> 780</span> <span class="comment">*</span></div>
<div class="line"><a name="l00781"></a><span class="lineno"> 781</span> <span class="comment">* double *cdelt</span></div>
<div class="line"><a name="l00782"></a><span class="lineno"> 782</span> <span class="comment">* (Given) Address of the first element of an array of double containing</span></div>
<div class="line"><a name="l00783"></a><span class="lineno"> 783</span> <span class="comment">* the coordinate increments, CDELTia.</span></div>
<div class="line"><a name="l00784"></a><span class="lineno"> 784</span> <span class="comment">*</span></div>
<div class="line"><a name="l00785"></a><span class="lineno"> 785</span> <span class="comment">* double *crval</span></div>
<div class="line"><a name="l00786"></a><span class="lineno"> 786</span> <span class="comment">* (Given) Address of the first element of an array of double containing</span></div>
<div class="line"><a name="l00787"></a><span class="lineno"> 787</span> <span class="comment">* the coordinate reference values, CRVALia.</span></div>
<div class="line"><a name="l00788"></a><span class="lineno"> 788</span> <span class="comment">*</span></div>
<div class="line"><a name="l00789"></a><span class="lineno"> 789</span> <span class="comment">* char (*cunit)[72]</span></div>
<div class="line"><a name="l00790"></a><span class="lineno"> 790</span> <span class="comment">* (Given) Address of the first element of an array of char[72] containing</span></div>
<div class="line"><a name="l00791"></a><span class="lineno"> 791</span> <span class="comment">* the CUNITia keyvalues which define the units of measurement of the</span></div>
<div class="line"><a name="l00792"></a><span class="lineno"> 792</span> <span class="comment">* CRVALia, CDELTia, and CDi_ja keywords.</span></div>
<div class="line"><a name="l00793"></a><span class="lineno"> 793</span> <span class="comment">*</span></div>
<div class="line"><a name="l00794"></a><span class="lineno"> 794</span> <span class="comment">* As CUNITia is an optional header keyword, cunit[][72] may be left blank</span></div>
<div class="line"><a name="l00795"></a><span class="lineno"> 795</span> <span class="comment">* but otherwise is expected to contain a standard units specification as</span></div>
<div class="line"><a name="l00796"></a><span class="lineno"> 796</span> <span class="comment">* defined by WCS Paper I. Utility function wcsutrn(), described in</span></div>
<div class="line"><a name="l00797"></a><span class="lineno"> 797</span> <span class="comment">* wcsunits.h, is available to translate commonly used non-standard units</span></div>
<div class="line"><a name="l00798"></a><span class="lineno"> 798</span> <span class="comment">* specifications but this must be done as a separate step before invoking</span></div>
<div class="line"><a name="l00799"></a><span class="lineno"> 799</span> <span class="comment">* wcsset().</span></div>
<div class="line"><a name="l00800"></a><span class="lineno"> 800</span> <span class="comment">*</span></div>
<div class="line"><a name="l00801"></a><span class="lineno"> 801</span> <span class="comment">* For celestial axes, if cunit[][72] is not blank, wcsset() uses</span></div>
<div class="line"><a name="l00802"></a><span class="lineno"> 802</span> <span class="comment">* wcsunits() to parse it and scale cdelt[], crval[], and cd[][*] to</span></div>
<div class="line"><a name="l00803"></a><span class="lineno"> 803</span> <span class="comment">* degrees. It then resets cunit[][72] to "deg".</span></div>
<div class="line"><a name="l00804"></a><span class="lineno"> 804</span> <span class="comment">*</span></div>
<div class="line"><a name="l00805"></a><span class="lineno"> 805</span> <span class="comment">* For spectral axes, if cunit[][72] is not blank, wcsset() uses wcsunits()</span></div>
<div class="line"><a name="l00806"></a><span class="lineno"> 806</span> <span class="comment">* to parse it and scale cdelt[], crval[], and cd[][*] to SI units. It</span></div>
<div class="line"><a name="l00807"></a><span class="lineno"> 807</span> <span class="comment">* then resets cunit[][72] accordingly.</span></div>
<div class="line"><a name="l00808"></a><span class="lineno"> 808</span> <span class="comment">*</span></div>
<div class="line"><a name="l00809"></a><span class="lineno"> 809</span> <span class="comment">* wcsset() ignores cunit[][72] for other coordinate types; cunit[][72] may</span></div>
<div class="line"><a name="l00810"></a><span class="lineno"> 810</span> <span class="comment">* be used to label coordinate values.</span></div>
<div class="line"><a name="l00811"></a><span class="lineno"> 811</span> <span class="comment">*</span></div>
<div class="line"><a name="l00812"></a><span class="lineno"> 812</span> <span class="comment">* These variables accomodate the longest allowed string-valued FITS</span></div>
<div class="line"><a name="l00813"></a><span class="lineno"> 813</span> <span class="comment">* keyword, being limited to 68 characters, plus the null-terminating</span></div>
<div class="line"><a name="l00814"></a><span class="lineno"> 814</span> <span class="comment">* character.</span></div>
<div class="line"><a name="l00815"></a><span class="lineno"> 815</span> <span class="comment">*</span></div>
<div class="line"><a name="l00816"></a><span class="lineno"> 816</span> <span class="comment">* char (*ctype)[72]</span></div>
<div class="line"><a name="l00817"></a><span class="lineno"> 817</span> <span class="comment">* (Given) Address of the first element of an array of char[72] containing</span></div>
<div class="line"><a name="l00818"></a><span class="lineno"> 818</span> <span class="comment">* the coordinate axis types, CTYPEia.</span></div>
<div class="line"><a name="l00819"></a><span class="lineno"> 819</span> <span class="comment">*</span></div>
<div class="line"><a name="l00820"></a><span class="lineno"> 820</span> <span class="comment">* The ctype[][72] keyword values must be in upper case and there must be</span></div>
<div class="line"><a name="l00821"></a><span class="lineno"> 821</span> <span class="comment">* zero or one pair of matched celestial axis types, and zero or one</span></div>
<div class="line"><a name="l00822"></a><span class="lineno"> 822</span> <span class="comment">* spectral axis. The ctype[][72] strings should be padded with blanks on</span></div>
<div class="line"><a name="l00823"></a><span class="lineno"> 823</span> <span class="comment">* the right and null-terminated so that they are at least eight characters</span></div>
<div class="line"><a name="l00824"></a><span class="lineno"> 824</span> <span class="comment">* in length.</span></div>
<div class="line"><a name="l00825"></a><span class="lineno"> 825</span> <span class="comment">*</span></div>
<div class="line"><a name="l00826"></a><span class="lineno"> 826</span> <span class="comment">* These variables accomodate the longest allowed string-valued FITS</span></div>
<div class="line"><a name="l00827"></a><span class="lineno"> 827</span> <span class="comment">* keyword, being limited to 68 characters, plus the null-terminating</span></div>
<div class="line"><a name="l00828"></a><span class="lineno"> 828</span> <span class="comment">* character.</span></div>
<div class="line"><a name="l00829"></a><span class="lineno"> 829</span> <span class="comment">*</span></div>
<div class="line"><a name="l00830"></a><span class="lineno"> 830</span> <span class="comment">* double lonpole</span></div>
<div class="line"><a name="l00831"></a><span class="lineno"> 831</span> <span class="comment">* (Given and returned) The native longitude of the celestial pole, phi_p,</span></div>
<div class="line"><a name="l00832"></a><span class="lineno"> 832</span> <span class="comment">* given by LONPOLEa [deg] or by PVi_2a [deg] attached to the longitude</span></div>
<div class="line"><a name="l00833"></a><span class="lineno"> 833</span> <span class="comment">* axis which takes precedence if defined, and ...</span></div>
<div class="line"><a name="l00834"></a><span class="lineno"> 834</span> <span class="comment">* double latpole</span></div>
<div class="line"><a name="l00835"></a><span class="lineno"> 835</span> <span class="comment">* (Given and returned) ... the native latitude of the celestial pole,</span></div>
<div class="line"><a name="l00836"></a><span class="lineno"> 836</span> <span class="comment">* theta_p, given by LATPOLEa [deg] or by PVi_3a [deg] attached to the</span></div>
<div class="line"><a name="l00837"></a><span class="lineno"> 837</span> <span class="comment">* longitude axis which takes precedence if defined.</span></div>
<div class="line"><a name="l00838"></a><span class="lineno"> 838</span> <span class="comment">*</span></div>
<div class="line"><a name="l00839"></a><span class="lineno"> 839</span> <span class="comment">* lonpole and latpole may be left to default to values set by wcsini()</span></div>
<div class="line"><a name="l00840"></a><span class="lineno"> 840</span> <span class="comment">* (see celprm::ref), but in any case they will be reset by wcsset() to</span></div>
<div class="line"><a name="l00841"></a><span class="lineno"> 841</span> <span class="comment">* the values actually used. Note therefore that if the wcsprm struct is</span></div>
<div class="line"><a name="l00842"></a><span class="lineno"> 842</span> <span class="comment">* reused without resetting them, whether directly or via wcsini(), they</span></div>
<div class="line"><a name="l00843"></a><span class="lineno"> 843</span> <span class="comment">* will no longer have their default values.</span></div>
<div class="line"><a name="l00844"></a><span class="lineno"> 844</span> <span class="comment">*</span></div>
<div class="line"><a name="l00845"></a><span class="lineno"> 845</span> <span class="comment">* double restfrq</span></div>
<div class="line"><a name="l00846"></a><span class="lineno"> 846</span> <span class="comment">* (Given) The rest frequency [Hz], and/or ...</span></div>
<div class="line"><a name="l00847"></a><span class="lineno"> 847</span> <span class="comment">* double restwav</span></div>
<div class="line"><a name="l00848"></a><span class="lineno"> 848</span> <span class="comment">* (Given) ... the rest wavelength in vacuuo [m], only one of which need be</span></div>
<div class="line"><a name="l00849"></a><span class="lineno"> 849</span> <span class="comment">* given, the other should be set to zero.</span></div>
<div class="line"><a name="l00850"></a><span class="lineno"> 850</span> <span class="comment">*</span></div>
<div class="line"><a name="l00851"></a><span class="lineno"> 851</span> <span class="comment">* int npv</span></div>
<div class="line"><a name="l00852"></a><span class="lineno"> 852</span> <span class="comment">* (Given) The number of entries in the wcsprm::pv[] array.</span></div>
<div class="line"><a name="l00853"></a><span class="lineno"> 853</span> <span class="comment">*</span></div>
<div class="line"><a name="l00854"></a><span class="lineno"> 854</span> <span class="comment">* int npvmax</span></div>
<div class="line"><a name="l00855"></a><span class="lineno"> 855</span> <span class="comment">* (Given or returned) The length of the wcsprm::pv[] array.</span></div>
<div class="line"><a name="l00856"></a><span class="lineno"> 856</span> <span class="comment">*</span></div>
<div class="line"><a name="l00857"></a><span class="lineno"> 857</span> <span class="comment">* npvmax will be set by wcsini() if it allocates memory for wcsprm::pv[],</span></div>
<div class="line"><a name="l00858"></a><span class="lineno"> 858</span> <span class="comment">* otherwise it must be set by the user. See also wcsnpv().</span></div>
<div class="line"><a name="l00859"></a><span class="lineno"> 859</span> <span class="comment">*</span></div>
<div class="line"><a name="l00860"></a><span class="lineno"> 860</span> <span class="comment">* struct pvcard *pv</span></div>
<div class="line"><a name="l00861"></a><span class="lineno"> 861</span> <span class="comment">* (Given or returned) Address of the first element of an array of length</span></div>
<div class="line"><a name="l00862"></a><span class="lineno"> 862</span> <span class="comment">* npvmax of pvcard structs. Set by wcsini() if it allocates memory for</span></div>
<div class="line"><a name="l00863"></a><span class="lineno"> 863</span> <span class="comment">* pv[], otherwise it must be set by the user. See also wcsnpv().</span></div>
<div class="line"><a name="l00864"></a><span class="lineno"> 864</span> <span class="comment">*</span></div>
<div class="line"><a name="l00865"></a><span class="lineno"> 865</span> <span class="comment">* As a FITS header parser encounters each PVi_ma keyword it should load it</span></div>
<div class="line"><a name="l00866"></a><span class="lineno"> 866</span> <span class="comment">* into a pvcard struct in the array and increment npv. wcsset()</span></div>
<div class="line"><a name="l00867"></a><span class="lineno"> 867</span> <span class="comment">* interprets these as required.</span></div>
<div class="line"><a name="l00868"></a><span class="lineno"> 868</span> <span class="comment">*</span></div>
<div class="line"><a name="l00869"></a><span class="lineno"> 869</span> <span class="comment">* Note that, if they were not given, wcsset() resets the entries for</span></div>
<div class="line"><a name="l00870"></a><span class="lineno"> 870</span> <span class="comment">* PVi_1a, PVi_2a, PVi_3a, and PVi_4a for longitude axis i to match</span></div>
<div class="line"><a name="l00871"></a><span class="lineno"> 871</span> <span class="comment">* phi_0 and theta_0 (the native longitude and latitude of the reference</span></div>
<div class="line"><a name="l00872"></a><span class="lineno"> 872</span> <span class="comment">* point), LONPOLEa and LATPOLEa respectively.</span></div>
<div class="line"><a name="l00873"></a><span class="lineno"> 873</span> <span class="comment">*</span></div>
<div class="line"><a name="l00874"></a><span class="lineno"> 874</span> <span class="comment">* int nps</span></div>
<div class="line"><a name="l00875"></a><span class="lineno"> 875</span> <span class="comment">* (Given) The number of entries in the wcsprm::ps[] array.</span></div>
<div class="line"><a name="l00876"></a><span class="lineno"> 876</span> <span class="comment">*</span></div>
<div class="line"><a name="l00877"></a><span class="lineno"> 877</span> <span class="comment">* int npsmax</span></div>
<div class="line"><a name="l00878"></a><span class="lineno"> 878</span> <span class="comment">* (Given or returned) The length of the wcsprm::ps[] array.</span></div>
<div class="line"><a name="l00879"></a><span class="lineno"> 879</span> <span class="comment">*</span></div>
<div class="line"><a name="l00880"></a><span class="lineno"> 880</span> <span class="comment">* npsmax will be set by wcsini() if it allocates memory for wcsprm::ps[],</span></div>
<div class="line"><a name="l00881"></a><span class="lineno"> 881</span> <span class="comment">* otherwise it must be set by the user. See also wcsnps().</span></div>
<div class="line"><a name="l00882"></a><span class="lineno"> 882</span> <span class="comment">*</span></div>
<div class="line"><a name="l00883"></a><span class="lineno"> 883</span> <span class="comment">* struct pscard *ps</span></div>
<div class="line"><a name="l00884"></a><span class="lineno"> 884</span> <span class="comment">* (Given or returned) Address of the first element of an array of length</span></div>
<div class="line"><a name="l00885"></a><span class="lineno"> 885</span> <span class="comment">* npsmax of pscard structs. Set by wcsini() if it allocates memory for</span></div>
<div class="line"><a name="l00886"></a><span class="lineno"> 886</span> <span class="comment">* ps[], otherwise it must be set by the user. See also wcsnps().</span></div>
<div class="line"><a name="l00887"></a><span class="lineno"> 887</span> <span class="comment">*</span></div>
<div class="line"><a name="l00888"></a><span class="lineno"> 888</span> <span class="comment">* As a FITS header parser encounters each PSi_ma keyword it should load it</span></div>
<div class="line"><a name="l00889"></a><span class="lineno"> 889</span> <span class="comment">* into a pscard struct in the array and increment nps. wcsset()</span></div>
<div class="line"><a name="l00890"></a><span class="lineno"> 890</span> <span class="comment">* interprets these as required (currently no PSi_ma keyvalues are</span></div>
<div class="line"><a name="l00891"></a><span class="lineno"> 891</span> <span class="comment">* recognized).</span></div>
<div class="line"><a name="l00892"></a><span class="lineno"> 892</span> <span class="comment">*</span></div>
<div class="line"><a name="l00893"></a><span class="lineno"> 893</span> <span class="comment">* double *cd</span></div>
<div class="line"><a name="l00894"></a><span class="lineno"> 894</span> <span class="comment">* (Given) For historical compatibility, the wcsprm struct supports two</span></div>
<div class="line"><a name="l00895"></a><span class="lineno"> 895</span> <span class="comment">* alternate specifications of the linear transformation matrix, those</span></div>
<div class="line"><a name="l00896"></a><span class="lineno"> 896</span> <span class="comment">* associated with the CDi_ja keywords, and ...</span></div>
<div class="line"><a name="l00897"></a><span class="lineno"> 897</span> <span class="comment">* double *crota</span></div>
<div class="line"><a name="l00898"></a><span class="lineno"> 898</span> <span class="comment">* (Given) ... those associated with the CROTAia keywords. Although these</span></div>
<div class="line"><a name="l00899"></a><span class="lineno"> 899</span> <span class="comment">* may not formally co-exist with PCi_ja, the approach taken here is simply</span></div>
<div class="line"><a name="l00900"></a><span class="lineno"> 900</span> <span class="comment">* to ignore them if given in conjunction with PCi_ja.</span></div>
<div class="line"><a name="l00901"></a><span class="lineno"> 901</span> <span class="comment">*</span></div>
<div class="line"><a name="l00902"></a><span class="lineno"> 902</span> <span class="comment">* int altlin</span></div>
<div class="line"><a name="l00903"></a><span class="lineno"> 903</span> <span class="comment">* (Given) altlin is a bit flag that denotes which of the PCi_ja, CDi_ja</span></div>
<div class="line"><a name="l00904"></a><span class="lineno"> 904</span> <span class="comment">* and CROTAia keywords are present in the header:</span></div>
<div class="line"><a name="l00905"></a><span class="lineno"> 905</span> <span class="comment">*</span></div>
<div class="line"><a name="l00906"></a><span class="lineno"> 906</span> <span class="comment">* - Bit 0: PCi_ja is present.</span></div>
<div class="line"><a name="l00907"></a><span class="lineno"> 907</span> <span class="comment">*</span></div>
<div class="line"><a name="l00908"></a><span class="lineno"> 908</span> <span class="comment">* - Bit 1: CDi_ja is present.</span></div>
<div class="line"><a name="l00909"></a><span class="lineno"> 909</span> <span class="comment">*</span></div>
<div class="line"><a name="l00910"></a><span class="lineno"> 910</span> <span class="comment">* Matrix elements in the IRAF convention are</span></div>
<div class="line"><a name="l00911"></a><span class="lineno"> 911</span> <span class="comment">* equivalent to the product CDi_ja = CDELTia * PCi_ja, but the</span></div>
<div class="line"><a name="l00912"></a><span class="lineno"> 912</span> <span class="comment">* defaults differ from that of the PCi_ja matrix. If one or more</span></div>
<div class="line"><a name="l00913"></a><span class="lineno"> 913</span> <span class="comment">* CDi_ja keywords are present then all unspecified CDi_ja default to</span></div>
<div class="line"><a name="l00914"></a><span class="lineno"> 914</span> <span class="comment">* zero. If no CDi_ja (or CROTAia) keywords are present, then the</span></div>
<div class="line"><a name="l00915"></a><span class="lineno"> 915</span> <span class="comment">* header is assumed to be in PCi_ja form whether or not any PCi_ja</span></div>
<div class="line"><a name="l00916"></a><span class="lineno"> 916</span> <span class="comment">* keywords are present since this results in an interpretation of</span></div>
<div class="line"><a name="l00917"></a><span class="lineno"> 917</span> <span class="comment">* CDELTia consistent with the original FITS specification.</span></div>
<div class="line"><a name="l00918"></a><span class="lineno"> 918</span> <span class="comment">*</span></div>
<div class="line"><a name="l00919"></a><span class="lineno"> 919</span> <span class="comment">* While CDi_ja may not formally co-exist with PCi_ja, it may co-exist</span></div>
<div class="line"><a name="l00920"></a><span class="lineno"> 920</span> <span class="comment">* with CDELTia and CROTAia which are to be ignored.</span></div>
<div class="line"><a name="l00921"></a><span class="lineno"> 921</span> <span class="comment">*</span></div>
<div class="line"><a name="l00922"></a><span class="lineno"> 922</span> <span class="comment">* - Bit 2: CROTAia is present.</span></div>
<div class="line"><a name="l00923"></a><span class="lineno"> 923</span> <span class="comment">*</span></div>
<div class="line"><a name="l00924"></a><span class="lineno"> 924</span> <span class="comment">* In the AIPS convention, CROTAia may only be</span></div>
<div class="line"><a name="l00925"></a><span class="lineno"> 925</span> <span class="comment">* associated with the latitude axis of a celestial axis pair. It</span></div>
<div class="line"><a name="l00926"></a><span class="lineno"> 926</span> <span class="comment">* specifies a rotation in the image plane that is applied AFTER the</span></div>
<div class="line"><a name="l00927"></a><span class="lineno"> 927</span> <span class="comment">* CDELTia; any other CROTAia keywords are ignored.</span></div>
<div class="line"><a name="l00928"></a><span class="lineno"> 928</span> <span class="comment">*</span></div>
<div class="line"><a name="l00929"></a><span class="lineno"> 929</span> <span class="comment">* CROTAia may not formally co-exist with PCi_ja.</span></div>
<div class="line"><a name="l00930"></a><span class="lineno"> 930</span> <span class="comment">*</span></div>
<div class="line"><a name="l00931"></a><span class="lineno"> 931</span> <span class="comment">* CROTAia and CDELTia may formally co-exist with CDi_ja but if so are to</span></div>
<div class="line"><a name="l00932"></a><span class="lineno"> 932</span> <span class="comment">* be ignored.</span></div>
<div class="line"><a name="l00933"></a><span class="lineno"> 933</span> <span class="comment">*</span></div>
<div class="line"><a name="l00934"></a><span class="lineno"> 934</span> <span class="comment">* CDi_ja and CROTAia keywords, if found, are to be stored in the</span></div>
<div class="line"><a name="l00935"></a><span class="lineno"> 935</span> <span class="comment">* wcsprm::cd and wcsprm::crota arrays which are dimensioned similarly to</span></div>
<div class="line"><a name="l00936"></a><span class="lineno"> 936</span> <span class="comment">* wcsprm::pc and wcsprm::cdelt. FITS</span></div>
<div class="line"><a name="l00937"></a><span class="lineno"> 937</span> <span class="comment">* header parsers should use the following procedure:</span></div>
<div class="line"><a name="l00938"></a><span class="lineno"> 938</span> <span class="comment">*</span></div>
<div class="line"><a name="l00939"></a><span class="lineno"> 939</span> <span class="comment">* - Whenever a PCi_ja keyword is encountered: altlin |= 1;</span></div>
<div class="line"><a name="l00940"></a><span class="lineno"> 940</span> <span class="comment">*</span></div>
<div class="line"><a name="l00941"></a><span class="lineno"> 941</span> <span class="comment">* - Whenever a CDi_ja keyword is encountered: altlin |= 2;</span></div>
<div class="line"><a name="l00942"></a><span class="lineno"> 942</span> <span class="comment">*</span></div>
<div class="line"><a name="l00943"></a><span class="lineno"> 943</span> <span class="comment">* - Whenever a CROTAia keyword is encountered: altlin |= 4;</span></div>
<div class="line"><a name="l00944"></a><span class="lineno"> 944</span> <span class="comment">*</span></div>
<div class="line"><a name="l00945"></a><span class="lineno"> 945</span> <span class="comment">* If none of these bits are set the PCi_ja representation results, i.e.</span></div>
<div class="line"><a name="l00946"></a><span class="lineno"> 946</span> <span class="comment">* wcsprm::pc and wcsprm::cdelt will be used as given.</span></div>
<div class="line"><a name="l00947"></a><span class="lineno"> 947</span> <span class="comment">*</span></div>
<div class="line"><a name="l00948"></a><span class="lineno"> 948</span> <span class="comment">* These alternate specifications of the linear transformation matrix are</span></div>
<div class="line"><a name="l00949"></a><span class="lineno"> 949</span> <span class="comment">* translated immediately to PCi_ja by wcsset() and are invisible to the</span></div>
<div class="line"><a name="l00950"></a><span class="lineno"> 950</span> <span class="comment">* lower-level WCSLIB routines. In particular, wcsset() resets</span></div>
<div class="line"><a name="l00951"></a><span class="lineno"> 951</span> <span class="comment">* wcsprm::cdelt to unity if CDi_ja is present (and no PCi_ja).</span></div>
<div class="line"><a name="l00952"></a><span class="lineno"> 952</span> <span class="comment">*</span></div>
<div class="line"><a name="l00953"></a><span class="lineno"> 953</span> <span class="comment">* If CROTAia are present but none is associated with the latitude axis</span></div>
<div class="line"><a name="l00954"></a><span class="lineno"> 954</span> <span class="comment">* (and no PCi_ja or CDi_ja), then wcsset() reverts to a unity PCi_ja</span></div>
<div class="line"><a name="l00955"></a><span class="lineno"> 955</span> <span class="comment">* matrix.</span></div>
<div class="line"><a name="l00956"></a><span class="lineno"> 956</span> <span class="comment">*</span></div>
<div class="line"><a name="l00957"></a><span class="lineno"> 957</span> <span class="comment">* int velref</span></div>
<div class="line"><a name="l00958"></a><span class="lineno"> 958</span> <span class="comment">* (Given) AIPS velocity code VELREF, refer to spcaips().</span></div>
<div class="line"><a name="l00959"></a><span class="lineno"> 959</span> <span class="comment">*</span></div>
<div class="line"><a name="l00960"></a><span class="lineno"> 960</span> <span class="comment">* char alt[4]</span></div>
<div class="line"><a name="l00961"></a><span class="lineno"> 961</span> <span class="comment">* (Given, auxiliary) Character code for alternate coordinate descriptions</span></div>
<div class="line"><a name="l00962"></a><span class="lineno"> 962</span> <span class="comment">* (i.e. the 'a' in keyword names such as CTYPEia). This is blank for the</span></div>
<div class="line"><a name="l00963"></a><span class="lineno"> 963</span> <span class="comment">* primary coordinate description, or one of the 26 upper-case letters,</span></div>
<div class="line"><a name="l00964"></a><span class="lineno"> 964</span> <span class="comment">* A-Z.</span></div>
<div class="line"><a name="l00965"></a><span class="lineno"> 965</span> <span class="comment">*</span></div>
<div class="line"><a name="l00966"></a><span class="lineno"> 966</span> <span class="comment">* An array of four characters is provided for alignment purposes, only the</span></div>
<div class="line"><a name="l00967"></a><span class="lineno"> 967</span> <span class="comment">* first is used.</span></div>
<div class="line"><a name="l00968"></a><span class="lineno"> 968</span> <span class="comment">*</span></div>
<div class="line"><a name="l00969"></a><span class="lineno"> 969</span> <span class="comment">* int colnum</span></div>
<div class="line"><a name="l00970"></a><span class="lineno"> 970</span> <span class="comment">* (Given, auxiliary) Where the coordinate representation is associated</span></div>
<div class="line"><a name="l00971"></a><span class="lineno"> 971</span> <span class="comment">* with an image-array column in a FITS binary table, this variable may be</span></div>
<div class="line"><a name="l00972"></a><span class="lineno"> 972</span> <span class="comment">* used to record the relevant column number.</span></div>
<div class="line"><a name="l00973"></a><span class="lineno"> 973</span> <span class="comment">*</span></div>
<div class="line"><a name="l00974"></a><span class="lineno"> 974</span> <span class="comment">* It should be set to zero for an image header or pixel list.</span></div>
<div class="line"><a name="l00975"></a><span class="lineno"> 975</span> <span class="comment">*</span></div>
<div class="line"><a name="l00976"></a><span class="lineno"> 976</span> <span class="comment">* int *colax</span></div>
<div class="line"><a name="l00977"></a><span class="lineno"> 977</span> <span class="comment">* (Given, auxiliary) Address of the first element of an array of int</span></div>
<div class="line"><a name="l00978"></a><span class="lineno"> 978</span> <span class="comment">* recording the column numbers for each axis in a pixel list.</span></div>
<div class="line"><a name="l00979"></a><span class="lineno"> 979</span> <span class="comment">*</span></div>
<div class="line"><a name="l00980"></a><span class="lineno"> 980</span> <span class="comment">* The array elements should be set to zero for an image header or image</span></div>
<div class="line"><a name="l00981"></a><span class="lineno"> 981</span> <span class="comment">* array in a binary table.</span></div>
<div class="line"><a name="l00982"></a><span class="lineno"> 982</span> <span class="comment">*</span></div>
<div class="line"><a name="l00983"></a><span class="lineno"> 983</span> <span class="comment">* char (*cname)[72]</span></div>
<div class="line"><a name="l00984"></a><span class="lineno"> 984</span> <span class="comment">* (Given, auxiliary) The address of the first element of an array of</span></div>
<div class="line"><a name="l00985"></a><span class="lineno"> 985</span> <span class="comment">* char[72] containing the coordinate axis names, CNAMEia.</span></div>
<div class="line"><a name="l00986"></a><span class="lineno"> 986</span> <span class="comment">*</span></div>
<div class="line"><a name="l00987"></a><span class="lineno"> 987</span> <span class="comment">* These variables accomodate the longest allowed string-valued FITS</span></div>
<div class="line"><a name="l00988"></a><span class="lineno"> 988</span> <span class="comment">* keyword, being limited to 68 characters, plus the null-terminating</span></div>
<div class="line"><a name="l00989"></a><span class="lineno"> 989</span> <span class="comment">* character.</span></div>
<div class="line"><a name="l00990"></a><span class="lineno"> 990</span> <span class="comment">*</span></div>
<div class="line"><a name="l00991"></a><span class="lineno"> 991</span> <span class="comment">* double *crder</span></div>
<div class="line"><a name="l00992"></a><span class="lineno"> 992</span> <span class="comment">* (Given, auxiliary) Address of the first element of an array of double</span></div>
<div class="line"><a name="l00993"></a><span class="lineno"> 993</span> <span class="comment">* recording the random error in the coordinate value, CRDERia.</span></div>
<div class="line"><a name="l00994"></a><span class="lineno"> 994</span> <span class="comment">* double *csyer</span></div>
<div class="line"><a name="l00995"></a><span class="lineno"> 995</span> <span class="comment">* (Given, auxiliary) Address of the first element of an array of double</span></div>
<div class="line"><a name="l00996"></a><span class="lineno"> 996</span> <span class="comment">* recording the systematic error in the coordinate value, CSYERia.</span></div>
<div class="line"><a name="l00997"></a><span class="lineno"> 997</span> <span class="comment">*</span></div>
<div class="line"><a name="l00998"></a><span class="lineno"> 998</span> <span class="comment">* char dateavg[72]</span></div>
<div class="line"><a name="l00999"></a><span class="lineno"> 999</span> <span class="comment">* (Given, auxiliary) The date of a representative mid-point of the</span></div>
<div class="line"><a name="l01000"></a><span class="lineno"> 1000</span> <span class="comment">* observation in ISO format, yyyy-mm-ddThh:mm:ss.</span></div>
<div class="line"><a name="l01001"></a><span class="lineno"> 1001</span> <span class="comment">* char dateobs[72]</span></div>
<div class="line"><a name="l01002"></a><span class="lineno"> 1002</span> <span class="comment">* (Given, auxiliary) The date of the start of the observation unless</span></div>
<div class="line"><a name="l01003"></a><span class="lineno"> 1003</span> <span class="comment">* otherwise explained in the comment field of the DATE-OBS keyword, in</span></div>
<div class="line"><a name="l01004"></a><span class="lineno"> 1004</span> <span class="comment">* ISO format, yyyy-mm-ddThh:mm:ss.</span></div>
<div class="line"><a name="l01005"></a><span class="lineno"> 1005</span> <span class="comment">*</span></div>
<div class="line"><a name="l01006"></a><span class="lineno"> 1006</span> <span class="comment">* double equinox</span></div>
<div class="line"><a name="l01007"></a><span class="lineno"> 1007</span> <span class="comment">* (Given, auxiliary) The equinox associated with dynamical equatorial or</span></div>
<div class="line"><a name="l01008"></a><span class="lineno"> 1008</span> <span class="comment">* ecliptic coordinate systems, EQUINOXa (or EPOCH in older headers). Not</span></div>
<div class="line"><a name="l01009"></a><span class="lineno"> 1009</span> <span class="comment">* applicable to ICRS equatorial or ecliptic coordinates.</span></div>
<div class="line"><a name="l01010"></a><span class="lineno"> 1010</span> <span class="comment">*</span></div>
<div class="line"><a name="l01011"></a><span class="lineno"> 1011</span> <span class="comment">* double mjdavg</span></div>
<div class="line"><a name="l01012"></a><span class="lineno"> 1012</span> <span class="comment">* (Given, auxiliary) Modified Julian Date (MJD = JD - 2400000.5), MJD-AVG,</span></div>
<div class="line"><a name="l01013"></a><span class="lineno"> 1013</span> <span class="comment">* corresponding to DATE-AVG.</span></div>
<div class="line"><a name="l01014"></a><span class="lineno"> 1014</span> <span class="comment">* double mjdobs</span></div>
<div class="line"><a name="l01015"></a><span class="lineno"> 1015</span> <span class="comment">* (Given, auxiliary) Modified Julian Date (MJD = JD - 2400000.5), MJD-OBS,</span></div>
<div class="line"><a name="l01016"></a><span class="lineno"> 1016</span> <span class="comment">* corresponding to DATE-OBS.</span></div>
<div class="line"><a name="l01017"></a><span class="lineno"> 1017</span> <span class="comment">*</span></div>
<div class="line"><a name="l01018"></a><span class="lineno"> 1018</span> <span class="comment">* double obsgeo[3]</span></div>
<div class="line"><a name="l01019"></a><span class="lineno"> 1019</span> <span class="comment">* (Given, auxiliary) Location of the observer in a standard terrestrial</span></div>
<div class="line"><a name="l01020"></a><span class="lineno"> 1020</span> <span class="comment">* reference frame, OBSGEO-X, OBSGEO-Y, OBSGEO-Z [m].</span></div>
<div class="line"><a name="l01021"></a><span class="lineno"> 1021</span> <span class="comment">*</span></div>
<div class="line"><a name="l01022"></a><span class="lineno"> 1022</span> <span class="comment">* char radesys[72]</span></div>
<div class="line"><a name="l01023"></a><span class="lineno"> 1023</span> <span class="comment">* (Given, auxiliary) The equatorial or ecliptic coordinate system type,</span></div>
<div class="line"><a name="l01024"></a><span class="lineno"> 1024</span> <span class="comment">* RADESYSa.</span></div>
<div class="line"><a name="l01025"></a><span class="lineno"> 1025</span> <span class="comment">*</span></div>
<div class="line"><a name="l01026"></a><span class="lineno"> 1026</span> <span class="comment">* char specsys[72]</span></div>
<div class="line"><a name="l01027"></a><span class="lineno"> 1027</span> <span class="comment">* (Given, auxiliary) Spectral reference frame (standard of rest),</span></div>
<div class="line"><a name="l01028"></a><span class="lineno"> 1028</span> <span class="comment">* SPECSYSa, and ...</span></div>
<div class="line"><a name="l01029"></a><span class="lineno"> 1029</span> <span class="comment">* char ssysobs[72]</span></div>
<div class="line"><a name="l01030"></a><span class="lineno"> 1030</span> <span class="comment">* (Given, auxiliary) ... the actual frame in which there is no</span></div>
<div class="line"><a name="l01031"></a><span class="lineno"> 1031</span> <span class="comment">* differential variation in the spectral coordinate across the</span></div>
<div class="line"><a name="l01032"></a><span class="lineno"> 1032</span> <span class="comment">* field-of-view, SSYSOBSa.</span></div>
<div class="line"><a name="l01033"></a><span class="lineno"> 1033</span> <span class="comment">* double velosys</span></div>
<div class="line"><a name="l01034"></a><span class="lineno"> 1034</span> <span class="comment">* (Given, auxiliary) The relative radial velocity [m/s] between the</span></div>
<div class="line"><a name="l01035"></a><span class="lineno"> 1035</span> <span class="comment">* observer and the selected standard of rest in the direction of the</span></div>
<div class="line"><a name="l01036"></a><span class="lineno"> 1036</span> <span class="comment">* celestial reference coordinate, VELOSYSa.</span></div>
<div class="line"><a name="l01037"></a><span class="lineno"> 1037</span> <span class="comment">*</span></div>
<div class="line"><a name="l01038"></a><span class="lineno"> 1038</span> <span class="comment">* double zsource</span></div>
<div class="line"><a name="l01039"></a><span class="lineno"> 1039</span> <span class="comment">* (Given, auxiliary) The redshift, ZSOURCEa, of the source, and ...</span></div>
<div class="line"><a name="l01040"></a><span class="lineno"> 1040</span> <span class="comment">* char ssyssrc[72]</span></div>
<div class="line"><a name="l01041"></a><span class="lineno"> 1041</span> <span class="comment">* (Given, auxiliary) ... the spectral reference frame (standard of rest)</span></div>
<div class="line"><a name="l01042"></a><span class="lineno"> 1042</span> <span class="comment">* in which this was measured, SSYSSRCa.</span></div>
<div class="line"><a name="l01043"></a><span class="lineno"> 1043</span> <span class="comment">*</span></div>
<div class="line"><a name="l01044"></a><span class="lineno"> 1044</span> <span class="comment">* double velangl</span></div>
<div class="line"><a name="l01045"></a><span class="lineno"> 1045</span> <span class="comment">* (Given, auxiliary) The angle [deg] that should be used to decompose an</span></div>
<div class="line"><a name="l01046"></a><span class="lineno"> 1046</span> <span class="comment">* observed velocity into radial and transverse components.</span></div>
<div class="line"><a name="l01047"></a><span class="lineno"> 1047</span> <span class="comment">*</span></div>
<div class="line"><a name="l01048"></a><span class="lineno"> 1048</span> <span class="comment">* char wcsname[72]</span></div>
<div class="line"><a name="l01049"></a><span class="lineno"> 1049</span> <span class="comment">* (Given, auxiliary) The name given to the coordinate representation,</span></div>
<div class="line"><a name="l01050"></a><span class="lineno"> 1050</span> <span class="comment">* WCSNAMEa. This variable accomodates the longest allowed string-valued</span></div>
<div class="line"><a name="l01051"></a><span class="lineno"> 1051</span> <span class="comment">* FITS keyword, being limited to 68 characters, plus the null-terminating</span></div>
<div class="line"><a name="l01052"></a><span class="lineno"> 1052</span> <span class="comment">* character.</span></div>
<div class="line"><a name="l01053"></a><span class="lineno"> 1053</span> <span class="comment">*</span></div>
<div class="line"><a name="l01054"></a><span class="lineno"> 1054</span> <span class="comment">* int ntab</span></div>
<div class="line"><a name="l01055"></a><span class="lineno"> 1055</span> <span class="comment">* (Given) See wcsprm::tab.</span></div>
<div class="line"><a name="l01056"></a><span class="lineno"> 1056</span> <span class="comment">*</span></div>
<div class="line"><a name="l01057"></a><span class="lineno"> 1057</span> <span class="comment">* int nwtb</span></div>
<div class="line"><a name="l01058"></a><span class="lineno"> 1058</span> <span class="comment">* (Given) See wcsprm::wtb.</span></div>
<div class="line"><a name="l01059"></a><span class="lineno"> 1059</span> <span class="comment">*</span></div>
<div class="line"><a name="l01060"></a><span class="lineno"> 1060</span> <span class="comment">* struct tabprm *tab</span></div>
<div class="line"><a name="l01061"></a><span class="lineno"> 1061</span> <span class="comment">* (Given) Address of the first element of an array of ntab tabprm structs</span></div>
<div class="line"><a name="l01062"></a><span class="lineno"> 1062</span> <span class="comment">* for which memory has been allocated. These are used to store tabular</span></div>
<div class="line"><a name="l01063"></a><span class="lineno"> 1063</span> <span class="comment">* transformation parameters.</span></div>
<div class="line"><a name="l01064"></a><span class="lineno"> 1064</span> <span class="comment">*</span></div>
<div class="line"><a name="l01065"></a><span class="lineno"> 1065</span> <span class="comment">* Although technically wcsprm::ntab and tab are "given", they will</span></div>
<div class="line"><a name="l01066"></a><span class="lineno"> 1066</span> <span class="comment">* normally be set by invoking wcstab(), whether directly or indirectly.</span></div>
<div class="line"><a name="l01067"></a><span class="lineno"> 1067</span> <span class="comment">*</span></div>
<div class="line"><a name="l01068"></a><span class="lineno"> 1068</span> <span class="comment">* The tabprm structs contain some members that must be supplied and others</span></div>
<div class="line"><a name="l01069"></a><span class="lineno"> 1069</span> <span class="comment">* that are derived. The information to be supplied comes primarily from</span></div>
<div class="line"><a name="l01070"></a><span class="lineno"> 1070</span> <span class="comment">* arrays stored in one or more FITS binary table extensions. These</span></div>
<div class="line"><a name="l01071"></a><span class="lineno"> 1071</span> <span class="comment">* arrays, referred to here as "wcstab arrays", are themselves located by</span></div>
<div class="line"><a name="l01072"></a><span class="lineno"> 1072</span> <span class="comment">* parameters stored in the FITS image header.</span></div>
<div class="line"><a name="l01073"></a><span class="lineno"> 1073</span> <span class="comment">*</span></div>
<div class="line"><a name="l01074"></a><span class="lineno"> 1074</span> <span class="comment">* struct wtbarr *wtb</span></div>
<div class="line"><a name="l01075"></a><span class="lineno"> 1075</span> <span class="comment">* (Given) Address of the first element of an array of nwtb wtbarr structs</span></div>
<div class="line"><a name="l01076"></a><span class="lineno"> 1076</span> <span class="comment">* for which memory has been allocated. These are used in extracting</span></div>
<div class="line"><a name="l01077"></a><span class="lineno"> 1077</span> <span class="comment">* wcstab arrays from a FITS binary table.</span></div>
<div class="line"><a name="l01078"></a><span class="lineno"> 1078</span> <span class="comment">*</span></div>
<div class="line"><a name="l01079"></a><span class="lineno"> 1079</span> <span class="comment">* Although technically wcsprm::nwtb and wtb are "given", they will</span></div>
<div class="line"><a name="l01080"></a><span class="lineno"> 1080</span> <span class="comment">* normally be set by invoking wcstab(), whether directly or indirectly.</span></div>
<div class="line"><a name="l01081"></a><span class="lineno"> 1081</span> <span class="comment">*</span></div>
<div class="line"><a name="l01082"></a><span class="lineno"> 1082</span> <span class="comment">* char lngtyp[8]</span></div>
<div class="line"><a name="l01083"></a><span class="lineno"> 1083</span> <span class="comment">* (Returned) Four-character WCS celestial longitude and ...</span></div>
<div class="line"><a name="l01084"></a><span class="lineno"> 1084</span> <span class="comment">* char lattyp[8]</span></div>
<div class="line"><a name="l01085"></a><span class="lineno"> 1085</span> <span class="comment">* (Returned) ... latitude axis types. e.g. "RA", "DEC", "GLON", "GLAT",</span></div>
<div class="line"><a name="l01086"></a><span class="lineno"> 1086</span> <span class="comment">* etc. extracted from 'RA--', 'DEC-', 'GLON', 'GLAT', etc. in the first</span></div>
<div class="line"><a name="l01087"></a><span class="lineno"> 1087</span> <span class="comment">* four characters of CTYPEia but with trailing dashes removed. (Declared</span></div>
<div class="line"><a name="l01088"></a><span class="lineno"> 1088</span> <span class="comment">* as char[8] for alignment reasons.)</span></div>
<div class="line"><a name="l01089"></a><span class="lineno"> 1089</span> <span class="comment">*</span></div>
<div class="line"><a name="l01090"></a><span class="lineno"> 1090</span> <span class="comment">* int lng</span></div>
<div class="line"><a name="l01091"></a><span class="lineno"> 1091</span> <span class="comment">* (Returned) Index for the longitude coordinate, and ...</span></div>
<div class="line"><a name="l01092"></a><span class="lineno"> 1092</span> <span class="comment">* int lat</span></div>
<div class="line"><a name="l01093"></a><span class="lineno"> 1093</span> <span class="comment">* (Returned) ... index for the latitude coordinate, and ...</span></div>
<div class="line"><a name="l01094"></a><span class="lineno"> 1094</span> <span class="comment">* int spec</span></div>
<div class="line"><a name="l01095"></a><span class="lineno"> 1095</span> <span class="comment">* (Returned) ... index for the spectral coordinate in the imgcrd[][] and</span></div>
<div class="line"><a name="l01096"></a><span class="lineno"> 1096</span> <span class="comment">* world[][] arrays in the API of wcsp2s(), wcss2p() and wcsmix().</span></div>
<div class="line"><a name="l01097"></a><span class="lineno"> 1097</span> <span class="comment">*</span></div>
<div class="line"><a name="l01098"></a><span class="lineno"> 1098</span> <span class="comment">* These may also serve as indices into the pixcrd[][] array provided that</span></div>
<div class="line"><a name="l01099"></a><span class="lineno"> 1099</span> <span class="comment">* the PCi_ja matrix does not transpose axes.</span></div>
<div class="line"><a name="l01100"></a><span class="lineno"> 1100</span> <span class="comment">*</span></div>
<div class="line"><a name="l01101"></a><span class="lineno"> 1101</span> <span class="comment">* int cubeface</span></div>
<div class="line"><a name="l01102"></a><span class="lineno"> 1102</span> <span class="comment">* (Returned) Index into the pixcrd[][] array for the CUBEFACE axis. This</span></div>
<div class="line"><a name="l01103"></a><span class="lineno"> 1103</span> <span class="comment">* is used for quadcube projections where the cube faces are stored on a</span></div>
<div class="line"><a name="l01104"></a><span class="lineno"> 1104</span> <span class="comment">* separate axis (see wcs.h).</span></div>
<div class="line"><a name="l01105"></a><span class="lineno"> 1105</span> <span class="comment">*</span></div>
<div class="line"><a name="l01106"></a><span class="lineno"> 1106</span> <span class="comment">* int *types</span></div>
<div class="line"><a name="l01107"></a><span class="lineno"> 1107</span> <span class="comment">* (Returned) Address of the first element of an array of int containing a</span></div>
<div class="line"><a name="l01108"></a><span class="lineno"> 1108</span> <span class="comment">* four-digit type code for each axis.</span></div>
<div class="line"><a name="l01109"></a><span class="lineno"> 1109</span> <span class="comment">*</span></div>
<div class="line"><a name="l01110"></a><span class="lineno"> 1110</span> <span class="comment">* - First digit (i.e. 1000s):</span></div>
<div class="line"><a name="l01111"></a><span class="lineno"> 1111</span> <span class="comment">* - 0: Non-specific coordinate type.</span></div>
<div class="line"><a name="l01112"></a><span class="lineno"> 1112</span> <span class="comment">* - 1: Stokes coordinate.</span></div>
<div class="line"><a name="l01113"></a><span class="lineno"> 1113</span> <span class="comment">* - 2: Celestial coordinate (including CUBEFACE).</span></div>
<div class="line"><a name="l01114"></a><span class="lineno"> 1114</span> <span class="comment">* - 3: Spectral coordinate.</span></div>
<div class="line"><a name="l01115"></a><span class="lineno"> 1115</span> <span class="comment">*</span></div>
<div class="line"><a name="l01116"></a><span class="lineno"> 1116</span> <span class="comment">* - Second digit (i.e. 100s):</span></div>
<div class="line"><a name="l01117"></a><span class="lineno"> 1117</span> <span class="comment">* - 0: Linear axis.</span></div>
<div class="line"><a name="l01118"></a><span class="lineno"> 1118</span> <span class="comment">* - 1: Quantized axis (STOKES, CUBEFACE).</span></div>
<div class="line"><a name="l01119"></a><span class="lineno"> 1119</span> <span class="comment">* - 2: Non-linear celestial axis.</span></div>
<div class="line"><a name="l01120"></a><span class="lineno"> 1120</span> <span class="comment">* - 3: Non-linear spectral axis.</span></div>
<div class="line"><a name="l01121"></a><span class="lineno"> 1121</span> <span class="comment">* - 4: Logarithmic axis.</span></div>
<div class="line"><a name="l01122"></a><span class="lineno"> 1122</span> <span class="comment">* - 5: Tabular axis.</span></div>
<div class="line"><a name="l01123"></a><span class="lineno"> 1123</span> <span class="comment">*</span></div>
<div class="line"><a name="l01124"></a><span class="lineno"> 1124</span> <span class="comment">* - Third digit (i.e. 10s):</span></div>
<div class="line"><a name="l01125"></a><span class="lineno"> 1125</span> <span class="comment">* - 0: Group number, e.g. lookup table number, being an index into the</span></div>
<div class="line"><a name="l01126"></a><span class="lineno"> 1126</span> <span class="comment">* tabprm array (see above).</span></div>
<div class="line"><a name="l01127"></a><span class="lineno"> 1127</span> <span class="comment">*</span></div>
<div class="line"><a name="l01128"></a><span class="lineno"> 1128</span> <span class="comment">* - The fourth digit is used as a qualifier depending on the axis type.</span></div>
<div class="line"><a name="l01129"></a><span class="lineno"> 1129</span> <span class="comment">*</span></div>
<div class="line"><a name="l01130"></a><span class="lineno"> 1130</span> <span class="comment">* - For celestial axes:</span></div>
<div class="line"><a name="l01131"></a><span class="lineno"> 1131</span> <span class="comment">* - 0: Longitude coordinate.</span></div>
<div class="line"><a name="l01132"></a><span class="lineno"> 1132</span> <span class="comment">* - 1: Latitude coordinate.</span></div>
<div class="line"><a name="l01133"></a><span class="lineno"> 1133</span> <span class="comment">* - 2: CUBEFACE number.</span></div>
<div class="line"><a name="l01134"></a><span class="lineno"> 1134</span> <span class="comment">*</span></div>
<div class="line"><a name="l01135"></a><span class="lineno"> 1135</span> <span class="comment">* - For lookup tables: the axis number in a multidimensional table.</span></div>
<div class="line"><a name="l01136"></a><span class="lineno"> 1136</span> <span class="comment">*</span></div>
<div class="line"><a name="l01137"></a><span class="lineno"> 1137</span> <span class="comment">* CTYPEia in "4-3" form with unrecognized algorithm code will have its</span></div>
<div class="line"><a name="l01138"></a><span class="lineno"> 1138</span> <span class="comment">* type set to -1 and generate an error.</span></div>
<div class="line"><a name="l01139"></a><span class="lineno"> 1139</span> <span class="comment">*</span></div>
<div class="line"><a name="l01140"></a><span class="lineno"> 1140</span> <span class="comment">* void *padding</span></div>
<div class="line"><a name="l01141"></a><span class="lineno"> 1141</span> <span class="comment">* (An unused variable inserted for alignment purposes only.)</span></div>
<div class="line"><a name="l01142"></a><span class="lineno"> 1142</span> <span class="comment">*</span></div>
<div class="line"><a name="l01143"></a><span class="lineno"> 1143</span> <span class="comment">* struct linprm lin</span></div>
<div class="line"><a name="l01144"></a><span class="lineno"> 1144</span> <span class="comment">* (Returned) Linear transformation parameters (usage is described in the</span></div>
<div class="line"><a name="l01145"></a><span class="lineno"> 1145</span> <span class="comment">* prologue to lin.h).</span></div>
<div class="line"><a name="l01146"></a><span class="lineno"> 1146</span> <span class="comment">*</span></div>
<div class="line"><a name="l01147"></a><span class="lineno"> 1147</span> <span class="comment">* struct celprm cel</span></div>
<div class="line"><a name="l01148"></a><span class="lineno"> 1148</span> <span class="comment">* (Returned) Celestial transformation parameters (usage is described in</span></div>
<div class="line"><a name="l01149"></a><span class="lineno"> 1149</span> <span class="comment">* the prologue to cel.h).</span></div>
<div class="line"><a name="l01150"></a><span class="lineno"> 1150</span> <span class="comment">*</span></div>
<div class="line"><a name="l01151"></a><span class="lineno"> 1151</span> <span class="comment">* struct spcprm spc</span></div>
<div class="line"><a name="l01152"></a><span class="lineno"> 1152</span> <span class="comment">* (Returned) Spectral transformation parameters (usage is described in the</span></div>
<div class="line"><a name="l01153"></a><span class="lineno"> 1153</span> <span class="comment">* prologue to spc.h).</span></div>
<div class="line"><a name="l01154"></a><span class="lineno"> 1154</span> <span class="comment">*</span></div>
<div class="line"><a name="l01155"></a><span class="lineno"> 1155</span> <span class="comment">* struct wcserr *err</span></div>
<div class="line"><a name="l01156"></a><span class="lineno"> 1156</span> <span class="comment">* (Returned) If enabled, when an error status is returned this struct</span></div>
<div class="line"><a name="l01157"></a><span class="lineno"> 1157</span> <span class="comment">* contains detailed information about the error, see wcserr_enable().</span></div>
<div class="line"><a name="l01158"></a><span class="lineno"> 1158</span> <span class="comment">*</span></div>
<div class="line"><a name="l01159"></a><span class="lineno"> 1159</span> <span class="comment">* void *m_padding</span></div>
<div class="line"><a name="l01160"></a><span class="lineno"> 1160</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01161"></a><span class="lineno"> 1161</span> <span class="comment">* int m_flag</span></div>
<div class="line"><a name="l01162"></a><span class="lineno"> 1162</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01163"></a><span class="lineno"> 1163</span> <span class="comment">* int m_naxis</span></div>
<div class="line"><a name="l01164"></a><span class="lineno"> 1164</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01165"></a><span class="lineno"> 1165</span> <span class="comment">* double *m_crpix</span></div>
<div class="line"><a name="l01166"></a><span class="lineno"> 1166</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01167"></a><span class="lineno"> 1167</span> <span class="comment">* double *m_pc</span></div>
<div class="line"><a name="l01168"></a><span class="lineno"> 1168</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01169"></a><span class="lineno"> 1169</span> <span class="comment">* double *m_cdelt</span></div>
<div class="line"><a name="l01170"></a><span class="lineno"> 1170</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01171"></a><span class="lineno"> 1171</span> <span class="comment">* double *m_crval</span></div>
<div class="line"><a name="l01172"></a><span class="lineno"> 1172</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01173"></a><span class="lineno"> 1173</span> <span class="comment">* char (*m_cunit)[72]</span></div>
<div class="line"><a name="l01174"></a><span class="lineno"> 1174</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01175"></a><span class="lineno"> 1175</span> <span class="comment">* char (*m_ctype)[72]</span></div>
<div class="line"><a name="l01176"></a><span class="lineno"> 1176</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01177"></a><span class="lineno"> 1177</span> <span class="comment">* struct pvcard *m_pv</span></div>
<div class="line"><a name="l01178"></a><span class="lineno"> 1178</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01179"></a><span class="lineno"> 1179</span> <span class="comment">* struct pscard *m_ps</span></div>
<div class="line"><a name="l01180"></a><span class="lineno"> 1180</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01181"></a><span class="lineno"> 1181</span> <span class="comment">* double *m_cd</span></div>
<div class="line"><a name="l01182"></a><span class="lineno"> 1182</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01183"></a><span class="lineno"> 1183</span> <span class="comment">* double *m_crota</span></div>
<div class="line"><a name="l01184"></a><span class="lineno"> 1184</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01185"></a><span class="lineno"> 1185</span> <span class="comment">* int *m_colax</span></div>
<div class="line"><a name="l01186"></a><span class="lineno"> 1186</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01187"></a><span class="lineno"> 1187</span> <span class="comment">* char (*m_cname)[72]</span></div>
<div class="line"><a name="l01188"></a><span class="lineno"> 1188</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01189"></a><span class="lineno"> 1189</span> <span class="comment">* double *m_crder</span></div>
<div class="line"><a name="l01190"></a><span class="lineno"> 1190</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01191"></a><span class="lineno"> 1191</span> <span class="comment">* double *m_csyer</span></div>
<div class="line"><a name="l01192"></a><span class="lineno"> 1192</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01193"></a><span class="lineno"> 1193</span> <span class="comment">* struct tabprm *m_tab</span></div>
<div class="line"><a name="l01194"></a><span class="lineno"> 1194</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01195"></a><span class="lineno"> 1195</span> <span class="comment">* struct wtbarr *m_wtb</span></div>
<div class="line"><a name="l01196"></a><span class="lineno"> 1196</span> <span class="comment">* (For internal use only.)</span></div>
<div class="line"><a name="l01197"></a><span class="lineno"> 1197</span> <span class="comment">*</span></div>
<div class="line"><a name="l01198"></a><span class="lineno"> 1198</span> <span class="comment">*</span></div>
<div class="line"><a name="l01199"></a><span class="lineno"> 1199</span> <span class="comment">* pscard struct - Store for PSi_ma keyrecords</span></div>
<div class="line"><a name="l01200"></a><span class="lineno"> 1200</span> <span class="comment">* -------------------------------------------</span></div>
<div class="line"><a name="l01201"></a><span class="lineno"> 1201</span> <span class="comment">* The pscard struct is used to pass the parsed contents of PSi_ma keyrecords</span></div>
<div class="line"><a name="l01202"></a><span class="lineno"> 1202</span> <span class="comment">* to wcsset() via the wcsprm struct.</span></div>
<div class="line"><a name="l01203"></a><span class="lineno"> 1203</span> <span class="comment">*</span></div>
<div class="line"><a name="l01204"></a><span class="lineno"> 1204</span> <span class="comment">* All members of this struct are to be set by the user.</span></div>
<div class="line"><a name="l01205"></a><span class="lineno"> 1205</span> <span class="comment">*</span></div>
<div class="line"><a name="l01206"></a><span class="lineno"> 1206</span> <span class="comment">* int i</span></div>
<div class="line"><a name="l01207"></a><span class="lineno"> 1207</span> <span class="comment">* (Given) Axis number (1-relative), as in the FITS PSi_ma keyword.</span></div>
<div class="line"><a name="l01208"></a><span class="lineno"> 1208</span> <span class="comment">*</span></div>
<div class="line"><a name="l01209"></a><span class="lineno"> 1209</span> <span class="comment">* int m</span></div>
<div class="line"><a name="l01210"></a><span class="lineno"> 1210</span> <span class="comment">* (Given) Parameter number (non-negative), as in the FITS PSi_ma keyword.</span></div>
<div class="line"><a name="l01211"></a><span class="lineno"> 1211</span> <span class="comment">*</span></div>
<div class="line"><a name="l01212"></a><span class="lineno"> 1212</span> <span class="comment">* char value[72]</span></div>
<div class="line"><a name="l01213"></a><span class="lineno"> 1213</span> <span class="comment">* (Given) Parameter value.</span></div>
<div class="line"><a name="l01214"></a><span class="lineno"> 1214</span> <span class="comment">*</span></div>
<div class="line"><a name="l01215"></a><span class="lineno"> 1215</span> <span class="comment">*</span></div>
<div class="line"><a name="l01216"></a><span class="lineno"> 1216</span> <span class="comment">* pvcard struct - Store for PVi_ma keyrecords</span></div>
<div class="line"><a name="l01217"></a><span class="lineno"> 1217</span> <span class="comment">* -------------------------------------------</span></div>
<div class="line"><a name="l01218"></a><span class="lineno"> 1218</span> <span class="comment">* The pvcard struct is used to pass the parsed contents of PVi_ma keyrecords</span></div>
<div class="line"><a name="l01219"></a><span class="lineno"> 1219</span> <span class="comment">* to wcsset() via the wcsprm struct.</span></div>
<div class="line"><a name="l01220"></a><span class="lineno"> 1220</span> <span class="comment">*</span></div>
<div class="line"><a name="l01221"></a><span class="lineno"> 1221</span> <span class="comment">* All members of this struct are to be set by the user.</span></div>
<div class="line"><a name="l01222"></a><span class="lineno"> 1222</span> <span class="comment">*</span></div>
<div class="line"><a name="l01223"></a><span class="lineno"> 1223</span> <span class="comment">* int i</span></div>
<div class="line"><a name="l01224"></a><span class="lineno"> 1224</span> <span class="comment">* (Given) Axis number (1-relative), as in the FITS PVi_ma keyword. If</span></div>
<div class="line"><a name="l01225"></a><span class="lineno"> 1225</span> <span class="comment">* i == 0, wcsset() will replace it with the latitude axis number.</span></div>
<div class="line"><a name="l01226"></a><span class="lineno"> 1226</span> <span class="comment">*</span></div>
<div class="line"><a name="l01227"></a><span class="lineno"> 1227</span> <span class="comment">* int m</span></div>
<div class="line"><a name="l01228"></a><span class="lineno"> 1228</span> <span class="comment">* (Given) Parameter number (non-negative), as in the FITS PVi_ma keyword.</span></div>
<div class="line"><a name="l01229"></a><span class="lineno"> 1229</span> <span class="comment">*</span></div>
<div class="line"><a name="l01230"></a><span class="lineno"> 1230</span> <span class="comment">* double value</span></div>
<div class="line"><a name="l01231"></a><span class="lineno"> 1231</span> <span class="comment">* (Given) Parameter value.</span></div>
<div class="line"><a name="l01232"></a><span class="lineno"> 1232</span> <span class="comment">*</span></div>
<div class="line"><a name="l01233"></a><span class="lineno"> 1233</span> <span class="comment">*</span></div>
<div class="line"><a name="l01234"></a><span class="lineno"> 1234</span> <span class="comment">* wtbarr struct - Extraction of coordinate lookup tables from BINTABLE</span></div>
<div class="line"><a name="l01235"></a><span class="lineno"> 1235</span> <span class="comment">* --------------------------------------------------------------------</span></div>
<div class="line"><a name="l01236"></a><span class="lineno"> 1236</span> <span class="comment">* Function wcstab(), which is invoked automatically by wcspih(), sets up an</span></div>
<div class="line"><a name="l01237"></a><span class="lineno"> 1237</span> <span class="comment">* array of wtbarr structs to assist in extracting coordinate lookup tables</span></div>
<div class="line"><a name="l01238"></a><span class="lineno"> 1238</span> <span class="comment">* from a binary table extension (BINTABLE) and copying them into the tabprm</span></div>
<div class="line"><a name="l01239"></a><span class="lineno"> 1239</span> <span class="comment">* structs stored in wcsprm. Refer to the usage notes for wcspih() and</span></div>
<div class="line"><a name="l01240"></a><span class="lineno"> 1240</span> <span class="comment">* wcstab() in wcshdr.h, and also the prologue to tab.h.</span></div>
<div class="line"><a name="l01241"></a><span class="lineno"> 1241</span> <span class="comment">*</span></div>
<div class="line"><a name="l01242"></a><span class="lineno"> 1242</span> <span class="comment">* For C++ usage, because of a name space conflict with the wtbarr typedef</span></div>
<div class="line"><a name="l01243"></a><span class="lineno"> 1243</span> <span class="comment">* defined in CFITSIO header fitsio.h, the wtbarr struct is renamed to wtbarr_s</span></div>
<div class="line"><a name="l01244"></a><span class="lineno"> 1244</span> <span class="comment">* by preprocessor macro substitution with scope limited to wcs.h itself.</span></div>
<div class="line"><a name="l01245"></a><span class="lineno"> 1245</span> <span class="comment">*</span></div>
<div class="line"><a name="l01246"></a><span class="lineno"> 1246</span> <span class="comment">* int i</span></div>
<div class="line"><a name="l01247"></a><span class="lineno"> 1247</span> <span class="comment">* (Given) Image axis number.</span></div>
<div class="line"><a name="l01248"></a><span class="lineno"> 1248</span> <span class="comment">*</span></div>
<div class="line"><a name="l01249"></a><span class="lineno"> 1249</span> <span class="comment">* int m</span></div>
<div class="line"><a name="l01250"></a><span class="lineno"> 1250</span> <span class="comment">* (Given) wcstab array axis number for index vectors.</span></div>
<div class="line"><a name="l01251"></a><span class="lineno"> 1251</span> <span class="comment">*</span></div>
<div class="line"><a name="l01252"></a><span class="lineno"> 1252</span> <span class="comment">* int kind</span></div>
<div class="line"><a name="l01253"></a><span class="lineno"> 1253</span> <span class="comment">* (Given) Character identifying the wcstab array type:</span></div>
<div class="line"><a name="l01254"></a><span class="lineno"> 1254</span> <span class="comment">* - c: coordinate array,</span></div>
<div class="line"><a name="l01255"></a><span class="lineno"> 1255</span> <span class="comment">* - i: index vector.</span></div>
<div class="line"><a name="l01256"></a><span class="lineno"> 1256</span> <span class="comment">*</span></div>
<div class="line"><a name="l01257"></a><span class="lineno"> 1257</span> <span class="comment">* char extnam[72]</span></div>
<div class="line"><a name="l01258"></a><span class="lineno"> 1258</span> <span class="comment">* (Given) EXTNAME identifying the binary table extension.</span></div>
<div class="line"><a name="l01259"></a><span class="lineno"> 1259</span> <span class="comment">*</span></div>
<div class="line"><a name="l01260"></a><span class="lineno"> 1260</span> <span class="comment">* int extver</span></div>
<div class="line"><a name="l01261"></a><span class="lineno"> 1261</span> <span class="comment">* (Given) EXTVER identifying the binary table extension.</span></div>
<div class="line"><a name="l01262"></a><span class="lineno"> 1262</span> <span class="comment">*</span></div>
<div class="line"><a name="l01263"></a><span class="lineno"> 1263</span> <span class="comment">* int extlev</span></div>
<div class="line"><a name="l01264"></a><span class="lineno"> 1264</span> <span class="comment">* (Given) EXTLEV identifying the binary table extension.</span></div>
<div class="line"><a name="l01265"></a><span class="lineno"> 1265</span> <span class="comment">*</span></div>
<div class="line"><a name="l01266"></a><span class="lineno"> 1266</span> <span class="comment">* char ttype[72]</span></div>
<div class="line"><a name="l01267"></a><span class="lineno"> 1267</span> <span class="comment">* (Given) TTYPEn identifying the column of the binary table that contains</span></div>
<div class="line"><a name="l01268"></a><span class="lineno"> 1268</span> <span class="comment">* the wcstab array.</span></div>
<div class="line"><a name="l01269"></a><span class="lineno"> 1269</span> <span class="comment">*</span></div>
<div class="line"><a name="l01270"></a><span class="lineno"> 1270</span> <span class="comment">* long row</span></div>
<div class="line"><a name="l01271"></a><span class="lineno"> 1271</span> <span class="comment">* (Given) Table row number.</span></div>
<div class="line"><a name="l01272"></a><span class="lineno"> 1272</span> <span class="comment">*</span></div>
<div class="line"><a name="l01273"></a><span class="lineno"> 1273</span> <span class="comment">* int ndim</span></div>
<div class="line"><a name="l01274"></a><span class="lineno"> 1274</span> <span class="comment">* (Given) Expected dimensionality of the wcstab array.</span></div>
<div class="line"><a name="l01275"></a><span class="lineno"> 1275</span> <span class="comment">*</span></div>
<div class="line"><a name="l01276"></a><span class="lineno"> 1276</span> <span class="comment">* int *dimlen</span></div>
<div class="line"><a name="l01277"></a><span class="lineno"> 1277</span> <span class="comment">* (Given) Address of the first element of an array of int of length ndim</span></div>
<div class="line"><a name="l01278"></a><span class="lineno"> 1278</span> <span class="comment">* into which the wcstab array axis lengths are to be written.</span></div>
<div class="line"><a name="l01279"></a><span class="lineno"> 1279</span> <span class="comment">*</span></div>
<div class="line"><a name="l01280"></a><span class="lineno"> 1280</span> <span class="comment">* double **arrayp</span></div>
<div class="line"><a name="l01281"></a><span class="lineno"> 1281</span> <span class="comment">* (Given) Pointer to an array of double which is to be allocated by the</span></div>
<div class="line"><a name="l01282"></a><span class="lineno"> 1282</span> <span class="comment">* user and into which the wcstab array is to be written.</span></div>
<div class="line"><a name="l01283"></a><span class="lineno"> 1283</span> <span class="comment">*</span></div>
<div class="line"><a name="l01284"></a><span class="lineno"> 1284</span> <span class="comment">*</span></div>
<div class="line"><a name="l01285"></a><span class="lineno"> 1285</span> <span class="comment">* Global variable: const char *wcs_errmsg[] - Status return messages</span></div>
<div class="line"><a name="l01286"></a><span class="lineno"> 1286</span> <span class="comment">* ------------------------------------------------------------------</span></div>
<div class="line"><a name="l01287"></a><span class="lineno"> 1287</span> <span class="comment">* Error messages to match the status value returned from each function.</span></div>
<div class="line"><a name="l01288"></a><span class="lineno"> 1288</span> <span class="comment">*</span></div>
<div class="line"><a name="l01289"></a><span class="lineno"> 1289</span> <span class="comment">*===========================================================================*/</span></div>
<div class="line"><a name="l01290"></a><span class="lineno"> 1290</span> </div>
<div class="line"><a name="l01291"></a><span class="lineno"> 1291</span> <span class="preprocessor">#ifndef WCSLIB_WCS</span></div>
<div class="line"><a name="l01292"></a><span class="lineno"> 1292</span> <span class="preprocessor"></span><span class="preprocessor">#define WCSLIB_WCS</span></div>
<div class="line"><a name="l01293"></a><span class="lineno"> 1293</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l01294"></a><span class="lineno"> 1294</span> <span class="preprocessor">#include "<a class="code" href="lin_8h.html">lin.h</a>"</span></div>
<div class="line"><a name="l01295"></a><span class="lineno"> 1295</span> <span class="preprocessor">#include "<a class="code" href="cel_8h.html">cel.h</a>"</span></div>
<div class="line"><a name="l01296"></a><span class="lineno"> 1296</span> <span class="preprocessor">#include "<a class="code" href="spc_8h.html">spc.h</a>"</span></div>
<div class="line"><a name="l01297"></a><span class="lineno"> 1297</span> <span class="preprocessor">#include "<a class="code" href="tab_8h.html">tab.h</a>"</span></div>
<div class="line"><a name="l01298"></a><span class="lineno"> 1298</span> <span class="preprocessor">#include "<a class="code" href="wcserr_8h.html">wcserr.h</a>"</span></div>
<div class="line"><a name="l01299"></a><span class="lineno"> 1299</span> </div>
<div class="line"><a name="l01300"></a><span class="lineno"> 1300</span> <span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a name="l01301"></a><span class="lineno"> 1301</span> <span class="preprocessor"></span><span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div>
<div class="line"><a name="l01302"></a><span class="lineno"> 1302</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l01303"></a><span class="lineno"> 1303</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l01304"></a><span class="lineno"><a class="code" href="wcs_8h.html#a0653c98b8a1bee5755740ae3f4854094"> 1304</a></span> <span class="preprocessor">#define WCSSUB_LONGITUDE 0x1001</span></div>
<div class="line"><a name="l01305"></a><span class="lineno"><a class="code" href="wcs_8h.html#a5d377c202850ee0eaf44b3e989d0736e"> 1305</a></span> <span class="preprocessor"></span><span class="preprocessor">#define WCSSUB_LATITUDE 0x1002</span></div>
<div class="line"><a name="l01306"></a><span class="lineno"><a class="code" href="wcs_8h.html#a22bbac394b025c4cfc7bd73b6d6e3962"> 1306</a></span> <span class="preprocessor"></span><span class="preprocessor">#define WCSSUB_CUBEFACE 0x1004</span></div>
<div class="line"><a name="l01307"></a><span class="lineno"><a class="code" href="wcs_8h.html#ab9885b02031ff7aa7b094f4a1edee2cd"> 1307</a></span> <span class="preprocessor"></span><span class="preprocessor">#define WCSSUB_CELESTIAL 0x1007</span></div>
<div class="line"><a name="l01308"></a><span class="lineno"><a class="code" href="wcs_8h.html#a4b2dfca2e80fe80ba85dc830cd9c377b"> 1308</a></span> <span class="preprocessor"></span><span class="preprocessor">#define WCSSUB_SPECTRAL 0x1008</span></div>
<div class="line"><a name="l01309"></a><span class="lineno"><a class="code" href="wcs_8h.html#a6ba6d2640572b12a11e3558fa75a01ed"> 1309</a></span> <span class="preprocessor"></span><span class="preprocessor">#define WCSSUB_STOKES 0x1010</span></div>
<div class="line"><a name="l01310"></a><span class="lineno"> 1310</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l01311"></a><span class="lineno"> 1311</span> </div>
<div class="line"><a name="l01312"></a><span class="lineno"> 1312</span> <span class="keyword">extern</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="wcs_8h.html#ad16bd8db875ee05b014429efdc1f3471" title="Status return messages. ">wcs_errmsg</a>[];</div>
<div class="line"><a name="l01313"></a><span class="lineno"> 1313</span> </div>
<div class="line"><a name="l01314"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25f"> 1314</a></span> <span class="keyword">enum</span> <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25f">wcs_errmsg_enum</a> {</div>
<div class="line"><a name="l01315"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa8b87c21d4a2cab41d4eea0a95378fca8"> 1315</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa8b87c21d4a2cab41d4eea0a95378fca8">WCSERR_SUCCESS</a> = 0, <span class="comment">/* Success. */</span></div>
<div class="line"><a name="l01316"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fac51c733d8a719dd698f9e96e9a4fa83f"> 1316</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fac51c733d8a719dd698f9e96e9a4fa83f">WCSERR_NULL_POINTER</a> = 1, <span class="comment">/* Null wcsprm pointer passed. */</span></div>
<div class="line"><a name="l01317"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa5c58d5530bc7577a70185376c15180af"> 1317</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa5c58d5530bc7577a70185376c15180af">WCSERR_MEMORY</a> = 2, <span class="comment">/* Memory allocation failed. */</span></div>
<div class="line"><a name="l01318"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa2904278d916c820236347783312a7ce0"> 1318</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa2904278d916c820236347783312a7ce0">WCSERR_SINGULAR_MTX</a> = 3, <span class="comment">/* Linear transformation matrix is</span></div>
<div class="line"><a name="l01319"></a><span class="lineno"> 1319</span> <span class="comment"> singular. */</span></div>
<div class="line"><a name="l01320"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa598db0fcc4961aa3c5e0a296bec2b313"> 1320</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa598db0fcc4961aa3c5e0a296bec2b313">WCSERR_BAD_CTYPE</a> = 4, <span class="comment">/* Inconsistent or unrecognized coordinate</span></div>
<div class="line"><a name="l01321"></a><span class="lineno"> 1321</span> <span class="comment"> axis types. */</span></div>
<div class="line"><a name="l01322"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fafe9ed842ea8f525c7b8fed2f60015dd9"> 1322</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fafe9ed842ea8f525c7b8fed2f60015dd9">WCSERR_BAD_PARAM</a> = 5, <span class="comment">/* Invalid parameter value. */</span></div>
<div class="line"><a name="l01323"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa71cb7eaa633d9e0f560555a016f1f007"> 1323</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa71cb7eaa633d9e0f560555a016f1f007">WCSERR_BAD_COORD_TRANS</a> = 6, <span class="comment">/* Invalid coordinate transformation</span></div>
<div class="line"><a name="l01324"></a><span class="lineno"> 1324</span> <span class="comment"> parameters. */</span></div>
<div class="line"><a name="l01325"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fadfa2a8cf8021827378091315b8e0a020"> 1325</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fadfa2a8cf8021827378091315b8e0a020">WCSERR_ILL_COORD_TRANS</a> = 7, <span class="comment">/* Ill-conditioned coordinate transformation</span></div>
<div class="line"><a name="l01326"></a><span class="lineno"> 1326</span> <span class="comment"> parameters. */</span></div>
<div class="line"><a name="l01327"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa08306533cf0c7555dad662e82e8a4a69"> 1327</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa08306533cf0c7555dad662e82e8a4a69">WCSERR_BAD_PIX</a> = 8, <span class="comment">/* One or more of the pixel coordinates were</span></div>
<div class="line"><a name="l01328"></a><span class="lineno"> 1328</span> <span class="comment"> invalid. */</span></div>
<div class="line"><a name="l01329"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa03824b7b5c22e5f0cc91363eb695a804"> 1329</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa03824b7b5c22e5f0cc91363eb695a804">WCSERR_BAD_WORLD</a> = 9, <span class="comment">/* One or more of the world coordinates were</span></div>
<div class="line"><a name="l01330"></a><span class="lineno"> 1330</span> <span class="comment"> invalid. */</span></div>
<div class="line"><a name="l01331"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa5d662102c172495df1f9bb03cedd701d"> 1331</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa5d662102c172495df1f9bb03cedd701d">WCSERR_BAD_WORLD_COORD</a> = 10, <span class="comment">/* Invalid world coordinate. */</span></div>
<div class="line"><a name="l01332"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa832122bb304560f92df91e391d55948a"> 1332</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa832122bb304560f92df91e391d55948a">WCSERR_NO_SOLUTION</a> = 11, <span class="comment">/* No solution found in the specified</span></div>
<div class="line"><a name="l01333"></a><span class="lineno"> 1333</span> <span class="comment"> interval. */</span></div>
<div class="line"><a name="l01334"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa88e600163f719a759d3569bf1548109e"> 1334</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa88e600163f719a759d3569bf1548109e">WCSERR_BAD_SUBIMAGE</a> = 12, <span class="comment">/* Invalid subimage specification. */</span></div>
<div class="line"><a name="l01335"></a><span class="lineno"><a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa37c8aa0aedc12c63df08f39cb7177ff7"> 1335</a></span>  <a class="code" href="wcs_8h.html#a158615aa1622d8feedd228795ff9a25fa37c8aa0aedc12c63df08f39cb7177ff7">WCSERR_NON_SEPARABLE</a> = 13 <span class="comment">/* Non-separable subimage coordinate</span></div>
<div class="line"><a name="l01336"></a><span class="lineno"> 1336</span> <span class="comment"> system. */</span></div>
<div class="line"><a name="l01337"></a><span class="lineno"> 1337</span> };</div>
<div class="line"><a name="l01338"></a><span class="lineno"> 1338</span> </div>
<div class="line"><a name="l01339"></a><span class="lineno"> 1339</span> </div>
<div class="line"><a name="l01340"></a><span class="lineno"> 1340</span> <span class="comment">/* Struct used for storing PVi_ma keywords. */</span></div>
<div class="line"><a name="l01341"></a><span class="lineno"><a class="code" href="structpvcard.html"> 1341</a></span> <span class="keyword">struct </span><a class="code" href="structpvcard.html" title="Store for PVi_ma keyrecords. ">pvcard</a> {</div>
<div class="line"><a name="l01342"></a><span class="lineno"><a class="code" href="structpvcard.html#a88fa516543184eaffe6bd2c57946d9a7"> 1342</a></span>  <span class="keywordtype">int</span> <a class="code" href="structpvcard.html#a88fa516543184eaffe6bd2c57946d9a7">i</a>; <span class="comment">/* Axis number, as in PVi_ma (1-relative). */</span></div>
<div class="line"><a name="l01343"></a><span class="lineno"><a class="code" href="structpvcard.html#af011f1972d6d345540f36a5c08a30d1f"> 1343</a></span>  <span class="keywordtype">int</span> <a class="code" href="structpvcard.html#af011f1972d6d345540f36a5c08a30d1f">m</a>; <span class="comment">/* Parameter number, ditto (0-relative). */</span></div>
<div class="line"><a name="l01344"></a><span class="lineno"><a class="code" href="structpvcard.html#a5c97562bbadb55b8a2db59d9c7878059"> 1344</a></span>  <span class="keywordtype">double</span> <a class="code" href="structpvcard.html#a5c97562bbadb55b8a2db59d9c7878059">value</a>; <span class="comment">/* Parameter value. */</span></div>
<div class="line"><a name="l01345"></a><span class="lineno"> 1345</span> };</div>
<div class="line"><a name="l01346"></a><span class="lineno"> 1346</span> </div>
<div class="line"><a name="l01347"></a><span class="lineno"> 1347</span> <span class="comment">/* Struct used for storing PSi_ma keywords. */</span></div>
<div class="line"><a name="l01348"></a><span class="lineno"><a class="code" href="structpscard.html"> 1348</a></span> <span class="keyword">struct </span><a class="code" href="structpscard.html" title="Store for PSi_ma keyrecords. ">pscard</a> {</div>
<div class="line"><a name="l01349"></a><span class="lineno"><a class="code" href="structpscard.html#a37a06c885cf73736f2eb5e78bd1034a1"> 1349</a></span>  <span class="keywordtype">int</span> <a class="code" href="structpscard.html#a37a06c885cf73736f2eb5e78bd1034a1">i</a>; <span class="comment">/* Axis number, as in PSi_ma (1-relative). */</span></div>
<div class="line"><a name="l01350"></a><span class="lineno"><a class="code" href="structpscard.html#a71912f084bc3cadeb0758756a723071a"> 1350</a></span>  <span class="keywordtype">int</span> <a class="code" href="structpscard.html#a71912f084bc3cadeb0758756a723071a">m</a>; <span class="comment">/* Parameter number, ditto (0-relative). */</span></div>
<div class="line"><a name="l01351"></a><span class="lineno"><a class="code" href="structpscard.html#a9986f2ace84978f6cc543224b57592c9"> 1351</a></span>  <span class="keywordtype">char</span> <a class="code" href="structpscard.html#a9986f2ace84978f6cc543224b57592c9">value</a>[72]; <span class="comment">/* Parameter value. */</span></div>
<div class="line"><a name="l01352"></a><span class="lineno"> 1352</span> };</div>
<div class="line"><a name="l01353"></a><span class="lineno"> 1353</span> </div>
<div class="line"><a name="l01354"></a><span class="lineno"> 1354</span>  <span class="comment">/* For extracting wcstab arrays. Matches */</span></div>
<div class="line"><a name="l01355"></a><span class="lineno"> 1355</span>  <span class="comment">/* the wtbarr typedef defined in CFITSIO */</span></div>
<div class="line"><a name="l01356"></a><span class="lineno"> 1356</span>  <span class="comment">/* header fitsio.h. */</span></div>
<div class="line"><a name="l01357"></a><span class="lineno"> 1357</span> <span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a name="l01358"></a><span class="lineno"> 1358</span> <span class="preprocessor"></span><span class="preprocessor">#define wtbarr wtbarr_s </span><span class="comment">/* See prologue above. */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l01359"></a><span class="lineno"> 1359</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l01360"></a><span class="lineno"> 1360</span> <span class="preprocessor"></span><span class="keyword">struct </span><a class="code" href="structwtbarr.html" title="Extraction of coordinate lookup tables from BINTABLE. ">wtbarr</a> {</div>
<div class="line"><a name="l01361"></a><span class="lineno"> 1361</span>  <span class="keywordtype">int</span> <a class="code" href="structwtbarr.html#a8743b84c99b4b5e7ab7bf0653507a180">i</a>; <span class="comment">/* Image axis number. */</span></div>
<div class="line"><a name="l01362"></a><span class="lineno"> 1362</span>  <span class="keywordtype">int</span> <a class="code" href="structwtbarr.html#a1e88ad32570534a006e96cba721489b5">m</a>; <span class="comment">/* Array axis number for index vectors. */</span></div>
<div class="line"><a name="l01363"></a><span class="lineno"> 1363</span>  <span class="keywordtype">int</span> <a class="code" href="structwtbarr.html#af8ea7b15992ab7a86be63ff83318be41">kind</a>; <span class="comment">/* wcstab array type. */</span></div>
<div class="line"><a name="l01364"></a><span class="lineno"> 1364</span>  <span class="keywordtype">char</span> <a class="code" href="structwtbarr.html#a9f1fcad814aa3da08dfa75ede2a07deb">extnam</a>[72]; <span class="comment">/* EXTNAME of binary table extension. */</span></div>
<div class="line"><a name="l01365"></a><span class="lineno"> 1365</span>  <span class="keywordtype">int</span> <a class="code" href="structwtbarr.html#a24487eda7b17800f41bd4a452c6306d5">extver</a>; <span class="comment">/* EXTVER of binary table extension. */</span></div>
<div class="line"><a name="l01366"></a><span class="lineno"> 1366</span>  <span class="keywordtype">int</span> <a class="code" href="structwtbarr.html#a10c8dba85b62e2794071dd50a41c4bb1">extlev</a>; <span class="comment">/* EXTLEV of binary table extension. */</span></div>
<div class="line"><a name="l01367"></a><span class="lineno"> 1367</span>  <span class="keywordtype">char</span> <a class="code" href="structwtbarr.html#a750832793167bbeebd1074e29844415d">ttype</a>[72]; <span class="comment">/* TTYPEn of column containing the array. */</span></div>
<div class="line"><a name="l01368"></a><span class="lineno"> 1368</span>  <span class="keywordtype">long</span> <a class="code" href="structwtbarr.html#a2ff7c235353320c6dd98951484012ee7">row</a>; <span class="comment">/* Table row number. */</span></div>
<div class="line"><a name="l01369"></a><span class="lineno"> 1369</span>  <span class="keywordtype">int</span> <a class="code" href="structwtbarr.html#af862b4f90b0406ed8dd0c240768d4bd3">ndim</a>; <span class="comment">/* Expected wcstab array dimensionality. */</span></div>
<div class="line"><a name="l01370"></a><span class="lineno"> 1370</span>  <span class="keywordtype">int</span> *<a class="code" href="structwtbarr.html#a901403d05f985d4a1fbd2fdc9585bd50">dimlen</a>; <span class="comment">/* Where to write the array axis lengths. */</span></div>
<div class="line"><a name="l01371"></a><span class="lineno"> 1371</span>  <span class="keywordtype">double</span> **<a class="code" href="structwtbarr.html#a41c30234dbdf18ac094872cf39562172">arrayp</a>; <span class="comment">/* Where to write the address of the array */</span></div>
<div class="line"><a name="l01372"></a><span class="lineno"> 1372</span>  <span class="comment">/* allocated to store the wcstab array. */</span></div>
<div class="line"><a name="l01373"></a><span class="lineno"> 1373</span> };</div>
<div class="line"><a name="l01374"></a><span class="lineno"> 1374</span> </div>
<div class="line"><a name="l01375"></a><span class="lineno"> 1375</span> </div>
<div class="line"><a name="l01376"></a><span class="lineno"><a class="code" href="structwcsprm.html"> 1376</a></span> <span class="keyword">struct </span><a class="code" href="structwcsprm.html" title="Coordinate transformation parameters. ">wcsprm</a> {</div>
<div class="line"><a name="l01377"></a><span class="lineno"> 1377</span>  <span class="comment">/* Initialization flag (see the prologue above). */</span></div>
<div class="line"><a name="l01378"></a><span class="lineno"> 1378</span>  <span class="comment">/*------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l01379"></a><span class="lineno"><a class="code" href="structwcsprm.html#a35bff8de85e5a8892e1b68db69ca7a68"> 1379</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#a35bff8de85e5a8892e1b68db69ca7a68">flag</a>; <span class="comment">/* Set to zero to force initialization. */</span></div>
<div class="line"><a name="l01380"></a><span class="lineno"> 1380</span> </div>
<div class="line"><a name="l01381"></a><span class="lineno"> 1381</span>  <span class="comment">/* FITS header keyvalues to be provided (see the prologue above). */</span></div>
<div class="line"><a name="l01382"></a><span class="lineno"> 1382</span>  <span class="comment">/*------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l01383"></a><span class="lineno"><a class="code" href="structwcsprm.html#a70cac2976524a5f0a6aeb2b3fcb95834"> 1383</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#a70cac2976524a5f0a6aeb2b3fcb95834">naxis</a>; <span class="comment">/* Number of axes (pixel and coordinate). */</span></div>
<div class="line"><a name="l01384"></a><span class="lineno"><a class="code" href="structwcsprm.html#aadad828f07e3affd1511e533b00da19f"> 1384</a></span>  <span class="keywordtype">double</span> *<a class="code" href="structwcsprm.html#aadad828f07e3affd1511e533b00da19f">crpix</a>; <span class="comment">/* CRPIXja keyvalues for each pixel axis. */</span></div>
<div class="line"><a name="l01385"></a><span class="lineno"><a class="code" href="structwcsprm.html#a3495a5b0ef529706ec9a0af5c3163d63"> 1385</a></span>  <span class="keywordtype">double</span> *<a class="code" href="structwcsprm.html#a3495a5b0ef529706ec9a0af5c3163d63">pc</a>; <span class="comment">/* PCi_ja linear transformation matrix. */</span></div>
<div class="line"><a name="l01386"></a><span class="lineno"><a class="code" href="structwcsprm.html#ade355cdce054938cfa36e06ef9c51446"> 1386</a></span>  <span class="keywordtype">double</span> *<a class="code" href="structwcsprm.html#ade355cdce054938cfa36e06ef9c51446">cdelt</a>; <span class="comment">/* CDELTia keyvalues for each coord axis. */</span></div>
<div class="line"><a name="l01387"></a><span class="lineno"><a class="code" href="structwcsprm.html#a7a0a1ce2432cef9377f70367ea1fd18c"> 1387</a></span>  <span class="keywordtype">double</span> *<a class="code" href="structwcsprm.html#a7a0a1ce2432cef9377f70367ea1fd18c">crval</a>; <span class="comment">/* CRVALia keyvalues for each coord axis. */</span></div>
<div class="line"><a name="l01388"></a><span class="lineno"> 1388</span> </div>
<div class="line"><a name="l01389"></a><span class="lineno"><a class="code" href="structwcsprm.html#aa0ae3f3605566be2e85e51e5b52c3b52"> 1389</a></span>  char (*<a class="code" href="structwcsprm.html#aa0ae3f3605566be2e85e51e5b52c3b52">cunit</a>)[72]; <span class="comment">/* CUNITia keyvalues for each coord axis. */</span></div>
<div class="line"><a name="l01390"></a><span class="lineno"><a class="code" href="structwcsprm.html#ae1f462606974e1324cd38f143eda691e"> 1390</a></span>  char (*<a class="code" href="structwcsprm.html#ae1f462606974e1324cd38f143eda691e">ctype</a>)[72]; <span class="comment">/* CTYPEia keyvalues for each coord axis. */</span></div>
<div class="line"><a name="l01391"></a><span class="lineno"> 1391</span> </div>
<div class="line"><a name="l01392"></a><span class="lineno"><a class="code" href="structwcsprm.html#af8f679749574250cb9ba09e1f05fab5d"> 1392</a></span>  <span class="keywordtype">double</span> <a class="code" href="structwcsprm.html#af8f679749574250cb9ba09e1f05fab5d">lonpole</a>; <span class="comment">/* LONPOLEa keyvalue. */</span></div>
<div class="line"><a name="l01393"></a><span class="lineno"><a class="code" href="structwcsprm.html#a5e04127eb71da6e1350467a7a6d236f5"> 1393</a></span>  <span class="keywordtype">double</span> <a class="code" href="structwcsprm.html#a5e04127eb71da6e1350467a7a6d236f5">latpole</a>; <span class="comment">/* LATPOLEa keyvalue. */</span></div>
<div class="line"><a name="l01394"></a><span class="lineno"> 1394</span> </div>
<div class="line"><a name="l01395"></a><span class="lineno"><a class="code" href="structwcsprm.html#ada1b98589c0127d34766b4c6b5d6cb41"> 1395</a></span>  <span class="keywordtype">double</span> <a class="code" href="structwcsprm.html#ada1b98589c0127d34766b4c6b5d6cb41">restfrq</a>; <span class="comment">/* RESTFRQa keyvalue. */</span></div>
<div class="line"><a name="l01396"></a><span class="lineno"><a class="code" href="structwcsprm.html#a5d0b60efc55a61525b9beb26ead4859e"> 1396</a></span>  <span class="keywordtype">double</span> <a class="code" href="structwcsprm.html#a5d0b60efc55a61525b9beb26ead4859e">restwav</a>; <span class="comment">/* RESTWAVa keyvalue. */</span></div>
<div class="line"><a name="l01397"></a><span class="lineno"> 1397</span> </div>
<div class="line"><a name="l01398"></a><span class="lineno"><a class="code" href="structwcsprm.html#a0e31f1eef036258c2957da9b985945dd"> 1398</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#a0e31f1eef036258c2957da9b985945dd">npv</a>; <span class="comment">/* Number of PVi_ma keywords, and the */</span></div>
<div class="line"><a name="l01399"></a><span class="lineno"><a class="code" href="structwcsprm.html#a912eed291f15134e8cfb8750acc6c4bc"> 1399</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#a912eed291f15134e8cfb8750acc6c4bc">npvmax</a>; <span class="comment">/* number for which space was allocated. */</span></div>
<div class="line"><a name="l01400"></a><span class="lineno"><a class="code" href="structwcsprm.html#a04fbd6ed1b338e225f2291523e64be2c"> 1400</a></span>  <span class="keyword">struct </span><a class="code" href="structpvcard.html" title="Store for PVi_ma keyrecords. ">pvcard</a> *<a class="code" href="structwcsprm.html#a04fbd6ed1b338e225f2291523e64be2c">pv</a>; <span class="comment">/* PVi_ma keywords for each i and m. */</span></div>
<div class="line"><a name="l01401"></a><span class="lineno"> 1401</span> </div>
<div class="line"><a name="l01402"></a><span class="lineno"><a class="code" href="structwcsprm.html#a4c89dafecd036e169f96cb84d53ace65"> 1402</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#a4c89dafecd036e169f96cb84d53ace65">nps</a>; <span class="comment">/* Number of PSi_ma keywords, and the */</span></div>
<div class="line"><a name="l01403"></a><span class="lineno"><a class="code" href="structwcsprm.html#a42052d557bdef2c5640a6d19b6d9ed8b"> 1403</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#a42052d557bdef2c5640a6d19b6d9ed8b">npsmax</a>; <span class="comment">/* number for which space was allocated. */</span></div>
<div class="line"><a name="l01404"></a><span class="lineno"><a class="code" href="structwcsprm.html#a9eca2fcc30058310d020181ae16bf256"> 1404</a></span>  <span class="keyword">struct </span><a class="code" href="structpscard.html" title="Store for PSi_ma keyrecords. ">pscard</a> *<a class="code" href="structwcsprm.html#a9eca2fcc30058310d020181ae16bf256">ps</a>; <span class="comment">/* PSi_ma keywords for each i and m. */</span></div>
<div class="line"><a name="l01405"></a><span class="lineno"> 1405</span> </div>
<div class="line"><a name="l01406"></a><span class="lineno"> 1406</span>  <span class="comment">/* Alternative header keyvalues (see the prologue above). */</span></div>
<div class="line"><a name="l01407"></a><span class="lineno"> 1407</span>  <span class="comment">/*------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l01408"></a><span class="lineno"><a class="code" href="structwcsprm.html#afd2f31d782b3becce4ca2f9b495ec0b1"> 1408</a></span>  <span class="keywordtype">double</span> *<a class="code" href="structwcsprm.html#afd2f31d782b3becce4ca2f9b495ec0b1">cd</a>; <span class="comment">/* CDi_ja linear transformation matrix. */</span></div>
<div class="line"><a name="l01409"></a><span class="lineno"><a class="code" href="structwcsprm.html#af124a4259475ea355ced38e73a05363a"> 1409</a></span>  <span class="keywordtype">double</span> *<a class="code" href="structwcsprm.html#af124a4259475ea355ced38e73a05363a">crota</a>; <span class="comment">/* CROTAia keyvalues for each coord axis. */</span></div>
<div class="line"><a name="l01410"></a><span class="lineno"><a class="code" href="structwcsprm.html#a8b3a65921acc0dabfa4efd19a003ea6e"> 1410</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#a8b3a65921acc0dabfa4efd19a003ea6e">altlin</a>; <span class="comment">/* Alternative representations */</span></div>
<div class="line"><a name="l01411"></a><span class="lineno"> 1411</span>  <span class="comment">/* Bit 0: PCi_ja is present, */</span></div>
<div class="line"><a name="l01412"></a><span class="lineno"> 1412</span>  <span class="comment">/* Bit 1: CDi_ja is present, */</span></div>
<div class="line"><a name="l01413"></a><span class="lineno"> 1413</span>  <span class="comment">/* Bit 2: CROTAia is present. */</span></div>
<div class="line"><a name="l01414"></a><span class="lineno"><a class="code" href="structwcsprm.html#ac3c9c869bef4e4850dfd9762b33ce908"> 1414</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#ac3c9c869bef4e4850dfd9762b33ce908">velref</a>; <span class="comment">/* AIPS velocity code, VELREF. */</span></div>
<div class="line"><a name="l01415"></a><span class="lineno"> 1415</span> </div>
<div class="line"><a name="l01416"></a><span class="lineno"> 1416</span>  <span class="comment">/* Auxiliary coordinate system information, not used by WCSLIB. */</span></div>
<div class="line"><a name="l01417"></a><span class="lineno"><a class="code" href="structwcsprm.html#ae7609283351ea46484690f873f8ea9c3"> 1417</a></span>  <span class="keywordtype">char</span> <a class="code" href="structwcsprm.html#ae7609283351ea46484690f873f8ea9c3">alt</a>[4];</div>
<div class="line"><a name="l01418"></a><span class="lineno"><a class="code" href="structwcsprm.html#a9ee8fb568ca75874bab00825b768f8ca"> 1418</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#a9ee8fb568ca75874bab00825b768f8ca">colnum</a>;</div>
<div class="line"><a name="l01419"></a><span class="lineno"><a class="code" href="structwcsprm.html#a7320fc64e7705cc7495eba07482b5c55"> 1419</a></span>  <span class="keywordtype">int</span> *<a class="code" href="structwcsprm.html#a7320fc64e7705cc7495eba07482b5c55">colax</a>;</div>
<div class="line"><a name="l01420"></a><span class="lineno"> 1420</span> </div>
<div class="line"><a name="l01421"></a><span class="lineno"><a class="code" href="structwcsprm.html#a922f0f57b8c35cad3d01ceedeba01d4b"> 1421</a></span>  char (*<a class="code" href="structwcsprm.html#a922f0f57b8c35cad3d01ceedeba01d4b">cname</a>)[72];</div>
<div class="line"><a name="l01422"></a><span class="lineno"><a class="code" href="structwcsprm.html#a49eee6450b1a646d3fe01b8965a63af4"> 1422</a></span>  <span class="keywordtype">double</span> *<a class="code" href="structwcsprm.html#a49eee6450b1a646d3fe01b8965a63af4">crder</a>;</div>
<div class="line"><a name="l01423"></a><span class="lineno"><a class="code" href="structwcsprm.html#a15485177ea8bbacefc29a5a5cba98c8f"> 1423</a></span>  <span class="keywordtype">double</span> *<a class="code" href="structwcsprm.html#a15485177ea8bbacefc29a5a5cba98c8f">csyer</a>;</div>
<div class="line"><a name="l01424"></a><span class="lineno"><a class="code" href="structwcsprm.html#ae6b40e2adeb31414871c7cae68619d63"> 1424</a></span>  <span class="keywordtype">char</span> <a class="code" href="structwcsprm.html#ae6b40e2adeb31414871c7cae68619d63">dateavg</a>[72];</div>
<div class="line"><a name="l01425"></a><span class="lineno"><a class="code" href="structwcsprm.html#aad387ccbd7847672b5dc2223d9124120"> 1425</a></span>  <span class="keywordtype">char</span> <a class="code" href="structwcsprm.html#aad387ccbd7847672b5dc2223d9124120">dateobs</a>[72];</div>
<div class="line"><a name="l01426"></a><span class="lineno"><a class="code" href="structwcsprm.html#a88b55f6c8d122f3ff63532de85698864"> 1426</a></span>  <span class="keywordtype">double</span> <a class="code" href="structwcsprm.html#a88b55f6c8d122f3ff63532de85698864">equinox</a>;</div>
<div class="line"><a name="l01427"></a><span class="lineno"><a class="code" href="structwcsprm.html#a0730c37f09502eb364f4e7d7addb8ab8"> 1427</a></span>  <span class="keywordtype">double</span> <a class="code" href="structwcsprm.html#a0730c37f09502eb364f4e7d7addb8ab8">mjdavg</a>;</div>
<div class="line"><a name="l01428"></a><span class="lineno"><a class="code" href="structwcsprm.html#ac0cb013b1505fb7abd4167ac0db0e0aa"> 1428</a></span>  <span class="keywordtype">double</span> <a class="code" href="structwcsprm.html#ac0cb013b1505fb7abd4167ac0db0e0aa">mjdobs</a>;</div>
<div class="line"><a name="l01429"></a><span class="lineno"><a class="code" href="structwcsprm.html#a6a88e64207df5007151c2c25028ce3eb"> 1429</a></span>  <span class="keywordtype">double</span> <a class="code" href="structwcsprm.html#a6a88e64207df5007151c2c25028ce3eb">obsgeo</a>[3];</div>
<div class="line"><a name="l01430"></a><span class="lineno"><a class="code" href="structwcsprm.html#a65801f93622504672ee3faf8f2110e48"> 1430</a></span>  <span class="keywordtype">char</span> <a class="code" href="structwcsprm.html#a65801f93622504672ee3faf8f2110e48">radesys</a>[72];</div>
<div class="line"><a name="l01431"></a><span class="lineno"><a class="code" href="structwcsprm.html#ac089e5d0e3191255ceaea7f8591b27ea"> 1431</a></span>  <span class="keywordtype">char</span> <a class="code" href="structwcsprm.html#ac089e5d0e3191255ceaea7f8591b27ea">specsys</a>[72];</div>
<div class="line"><a name="l01432"></a><span class="lineno"><a class="code" href="structwcsprm.html#a9eac54f497e1244c8106dd3ebba12223"> 1432</a></span>  <span class="keywordtype">char</span> <a class="code" href="structwcsprm.html#a9eac54f497e1244c8106dd3ebba12223">ssysobs</a>[72];</div>
<div class="line"><a name="l01433"></a><span class="lineno"><a class="code" href="structwcsprm.html#af300da5a94594a9769ab312bb56dde83"> 1433</a></span>  <span class="keywordtype">double</span> <a class="code" href="structwcsprm.html#af300da5a94594a9769ab312bb56dde83">velosys</a>;</div>
<div class="line"><a name="l01434"></a><span class="lineno"><a class="code" href="structwcsprm.html#a0936d10c2ac93d13d096b1711ac639a1"> 1434</a></span>  <span class="keywordtype">double</span> <a class="code" href="structwcsprm.html#a0936d10c2ac93d13d096b1711ac639a1">zsource</a>;</div>
<div class="line"><a name="l01435"></a><span class="lineno"><a class="code" href="structwcsprm.html#a8715975565c8bbd0c562a32eee40fd20"> 1435</a></span>  <span class="keywordtype">char</span> <a class="code" href="structwcsprm.html#a8715975565c8bbd0c562a32eee40fd20">ssyssrc</a>[72];</div>
<div class="line"><a name="l01436"></a><span class="lineno"><a class="code" href="structwcsprm.html#a9fd60ce9e6bc31df07ed02ce64b48be4"> 1436</a></span>  <span class="keywordtype">double</span> <a class="code" href="structwcsprm.html#a9fd60ce9e6bc31df07ed02ce64b48be4">velangl</a>;</div>
<div class="line"><a name="l01437"></a><span class="lineno"><a class="code" href="structwcsprm.html#a2166fb650f937d8870711d8be5986b66"> 1437</a></span>  <span class="keywordtype">char</span> <a class="code" href="structwcsprm.html#a2166fb650f937d8870711d8be5986b66">wcsname</a>[72];</div>
<div class="line"><a name="l01438"></a><span class="lineno"> 1438</span> </div>
<div class="line"><a name="l01439"></a><span class="lineno"> 1439</span>  <span class="comment">/* Coordinate lookup tables (see the prologue above). */</span></div>
<div class="line"><a name="l01440"></a><span class="lineno"> 1440</span>  <span class="comment">/*------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l01441"></a><span class="lineno"><a class="code" href="structwcsprm.html#a94c26ce331cc876d63baeeada9820241"> 1441</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#a94c26ce331cc876d63baeeada9820241">ntab</a>; <span class="comment">/* Number of separate tables. */</span></div>
<div class="line"><a name="l01442"></a><span class="lineno"><a class="code" href="structwcsprm.html#a8625c0a6ff99c754566c46c2372df801"> 1442</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#a8625c0a6ff99c754566c46c2372df801">nwtb</a>; <span class="comment">/* Number of wtbarr structs. */</span></div>
<div class="line"><a name="l01443"></a><span class="lineno"><a class="code" href="structwcsprm.html#a292133b2b7143b969a3af6a3f2cf3709"> 1443</a></span>  <span class="keyword">struct </span><a class="code" href="structtabprm.html" title="Tabular transformation parameters. ">tabprm</a> *<a class="code" href="structwcsprm.html#a292133b2b7143b969a3af6a3f2cf3709">tab</a>; <span class="comment">/* Tabular transformation parameters. */</span></div>
<div class="line"><a name="l01444"></a><span class="lineno"><a class="code" href="structwcsprm.html#a9063e8d0c956e9eae7f7d6f3608b9ed2"> 1444</a></span>  <span class="keyword">struct </span><a class="code" href="structwtbarr.html" title="Extraction of coordinate lookup tables from BINTABLE. ">wtbarr</a> *<a class="code" href="structwcsprm.html#a9063e8d0c956e9eae7f7d6f3608b9ed2">wtb</a>; <span class="comment">/* Array of wtbarr structs. */</span></div>
<div class="line"><a name="l01445"></a><span class="lineno"> 1445</span> </div>
<div class="line"><a name="l01446"></a><span class="lineno"> 1446</span>  <span class="comment">/* Information derived from the FITS header keyvalues by wcsset(). */</span></div>
<div class="line"><a name="l01447"></a><span class="lineno"> 1447</span>  <span class="comment">/*------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l01448"></a><span class="lineno"><a class="code" href="structwcsprm.html#a5b56e1b378a6ae9f8dfff5c364f0653c"> 1448</a></span>  <span class="keywordtype">char</span> <a class="code" href="structwcsprm.html#a5b56e1b378a6ae9f8dfff5c364f0653c">lngtyp</a>[8], <a class="code" href="structwcsprm.html#ae352318ce3202dab1b5db8b9ceec7703">lattyp</a>[8]; <span class="comment">/* Celestial axis types, e.g. RA, DEC. */</span></div>
<div class="line"><a name="l01449"></a><span class="lineno"><a class="code" href="structwcsprm.html#ab9729795155b8f37afd80784fb70068b"> 1449</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#a08098820949433d1336841d32d0b62b5">lng</a>, <a class="code" href="structwcsprm.html#ab7f7173e6d2b1b8028a3275bdd751e79">lat</a>, <a class="code" href="structwcsprm.html#ab9729795155b8f37afd80784fb70068b">spec</a>; <span class="comment">/* Longitude, latitude and spectral axis */</span></div>
<div class="line"><a name="l01450"></a><span class="lineno"> 1450</span>  <span class="comment">/* indices (0-relative). */</span></div>
<div class="line"><a name="l01451"></a><span class="lineno"><a class="code" href="structwcsprm.html#ade8495d3ca5047eeadba5934d0bb2708"> 1451</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#ade8495d3ca5047eeadba5934d0bb2708">cubeface</a>; <span class="comment">/* True if there is a CUBEFACE axis. */</span></div>
<div class="line"><a name="l01452"></a><span class="lineno"><a class="code" href="structwcsprm.html#ab63cdcf6ff8febd1b40d0e044ca7d7ef"> 1452</a></span>  <span class="keywordtype">int</span> *<a class="code" href="structwcsprm.html#ab63cdcf6ff8febd1b40d0e044ca7d7ef">types</a>; <span class="comment">/* Coordinate type codes for each axis. */</span></div>
<div class="line"><a name="l01453"></a><span class="lineno"><a class="code" href="structwcsprm.html#a0cc4f20f62b3473d2ff3756bdfff6fd4"> 1453</a></span>  <span class="keywordtype">void</span> *<a class="code" href="structwcsprm.html#a0cc4f20f62b3473d2ff3756bdfff6fd4">padding</a>; <span class="comment">/* (Dummy inserted for alignment purposes.) */</span></div>
<div class="line"><a name="l01454"></a><span class="lineno"> 1454</span> </div>
<div class="line"><a name="l01455"></a><span class="lineno"><a class="code" href="structwcsprm.html#a3224bd06f8f4d2d7d398533eb44a49e8"> 1455</a></span>  <span class="keyword">struct </span><a class="code" href="structlinprm.html" title="Linear transformation parameters. ">linprm</a> <a class="code" href="structwcsprm.html#a3224bd06f8f4d2d7d398533eb44a49e8">lin</a>; <span class="comment">/* Linear transformation parameters. */</span></div>
<div class="line"><a name="l01456"></a><span class="lineno"><a class="code" href="structwcsprm.html#ac8391dd770637dbb841067996b7777ba"> 1456</a></span>  <span class="keyword">struct </span><a class="code" href="structcelprm.html" title="Celestial transformation parameters. ">celprm</a> <a class="code" href="structwcsprm.html#ac8391dd770637dbb841067996b7777ba">cel</a>; <span class="comment">/* Celestial transformation parameters. */</span></div>
<div class="line"><a name="l01457"></a><span class="lineno"><a class="code" href="structwcsprm.html#ae83952aec7c1ac76c090bc89bf4eeea7"> 1457</a></span>  <span class="keyword">struct </span><a class="code" href="structspcprm.html" title="Spectral transformation parameters. ">spcprm</a> <a class="code" href="structwcsprm.html#ae83952aec7c1ac76c090bc89bf4eeea7">spc</a>; <span class="comment">/* Spectral transformation parameters. */</span></div>
<div class="line"><a name="l01458"></a><span class="lineno"> 1458</span> </div>
<div class="line"><a name="l01459"></a><span class="lineno"> 1459</span>  <span class="comment">/* Error handling */</span></div>
<div class="line"><a name="l01460"></a><span class="lineno"> 1460</span>  <span class="comment">/*------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l01461"></a><span class="lineno"><a class="code" href="structwcsprm.html#af54ce939604be183231f0ee006e2f8ed"> 1461</a></span>  <span class="keyword">struct </span><a class="code" href="structwcserr.html" title="Error message handling. ">wcserr</a> *<a class="code" href="structwcsprm.html#af54ce939604be183231f0ee006e2f8ed">err</a>;</div>
<div class="line"><a name="l01462"></a><span class="lineno"> 1462</span> </div>
<div class="line"><a name="l01463"></a><span class="lineno"> 1463</span>  <span class="comment">/* Private - the remainder are for memory management. */</span></div>
<div class="line"><a name="l01464"></a><span class="lineno"> 1464</span>  <span class="comment">/*------------------------------------------------------------------------*/</span></div>
<div class="line"><a name="l01465"></a><span class="lineno"><a class="code" href="structwcsprm.html#a5c80dded8a6e9bbb9e26c32c17443563"> 1465</a></span>  <span class="keywordtype">void</span> *<a class="code" href="structwcsprm.html#a5c80dded8a6e9bbb9e26c32c17443563">m_padding</a>;</div>
<div class="line"><a name="l01466"></a><span class="lineno"><a class="code" href="structwcsprm.html#a5ed753e401cda620a04adfb4ebfb8e0d"> 1466</a></span>  <span class="keywordtype">int</span> <a class="code" href="structwcsprm.html#a5780880281f2f9d085d2e06919b7647a">m_flag</a>, <a class="code" href="structwcsprm.html#a5ed753e401cda620a04adfb4ebfb8e0d">m_naxis</a>;</div>
<div class="line"><a name="l01467"></a><span class="lineno"><a class="code" href="structwcsprm.html#a6778d31ec5a2ee643dc5f0a8af630b03"> 1467</a></span>  <span class="keywordtype">double</span> *<a class="code" href="structwcsprm.html#a164e3852bcd2dea8b5f73e1dff79ddf5">m_crpix</a>, *<a class="code" href="structwcsprm.html#a6778d31ec5a2ee643dc5f0a8af630b03">m_pc</a>, *<a class="code" href="structwcsprm.html#a42e0ff2da3b0c1ca0a9509f787ed1951">m_cdelt</a>, *<a class="code" href="structwcsprm.html#a5072893bd9beddb33967697d501acdce">m_crval</a>;</div>
<div class="line"><a name="l01468"></a><span class="lineno"><a class="code" href="structwcsprm.html#af1cb3e68560d1ac42c620cfe3900af95"> 1468</a></span>  char (*<a class="code" href="structwcsprm.html#af1cb3e68560d1ac42c620cfe3900af95">m_cunit</a>)[72], (*m_ctype)[72];</div>
<div class="line"><a name="l01469"></a><span class="lineno"><a class="code" href="structwcsprm.html#a6a3fa7adc304567271c5cc0eda3ac986"> 1469</a></span>  <span class="keyword">struct </span><a class="code" href="structpvcard.html" title="Store for PVi_ma keyrecords. ">pvcard</a> *<a class="code" href="structwcsprm.html#a6a3fa7adc304567271c5cc0eda3ac986">m_pv</a>;</div>
<div class="line"><a name="l01470"></a><span class="lineno"><a class="code" href="structwcsprm.html#a042875def8cab8354c5b2c40ab9fa374"> 1470</a></span>  <span class="keyword">struct </span><a class="code" href="structpscard.html" title="Store for PSi_ma keyrecords. ">pscard</a> *<a class="code" href="structwcsprm.html#a042875def8cab8354c5b2c40ab9fa374">m_ps</a>;</div>
<div class="line"><a name="l01471"></a><span class="lineno"><a class="code" href="structwcsprm.html#a5444415c94c7ab0226788f5efe93221d"> 1471</a></span>  <span class="keywordtype">double</span> *<a class="code" href="structwcsprm.html#a7a88af56c4c978c6d4213ae1f4bec87a">m_cd</a>, *<a class="code" href="structwcsprm.html#a5444415c94c7ab0226788f5efe93221d">m_crota</a>;</div>
<div class="line"><a name="l01472"></a><span class="lineno"><a class="code" href="structwcsprm.html#a4ed527b90d49e8365c1b727f7bec29c7"> 1472</a></span>  <span class="keywordtype">int</span> *<a class="code" href="structwcsprm.html#a4ed527b90d49e8365c1b727f7bec29c7">m_colax</a>;</div>
<div class="line"><a name="l01473"></a><span class="lineno"><a class="code" href="structwcsprm.html#a092c11d209ecdd16bb79858c68e4d582"> 1473</a></span>  char (*<a class="code" href="structwcsprm.html#a092c11d209ecdd16bb79858c68e4d582">m_cname</a>)[72];</div>
<div class="line"><a name="l01474"></a><span class="lineno"><a class="code" href="structwcsprm.html#a13fab263ca03f35844fdaca289b7dfac"> 1474</a></span>  <span class="keywordtype">double</span> *<a class="code" href="structwcsprm.html#a0d15534535c7f9308c9daa2cceff29e7">m_crder</a>, *<a class="code" href="structwcsprm.html#a13fab263ca03f35844fdaca289b7dfac">m_csyer</a>;</div>
<div class="line"><a name="l01475"></a><span class="lineno"><a class="code" href="structwcsprm.html#ae09d5bf005e3bd7ee880353e8816ceb8"> 1475</a></span>  <span class="keyword">struct </span><a class="code" href="structtabprm.html" title="Tabular transformation parameters. ">tabprm</a> *<a class="code" href="structwcsprm.html#ae09d5bf005e3bd7ee880353e8816ceb8">m_tab</a>;</div>
<div class="line"><a name="l01476"></a><span class="lineno"><a class="code" href="structwcsprm.html#ace7e0986c79d73bd3a0613034b71974f"> 1476</a></span>  <span class="keyword">struct </span><a class="code" href="structwtbarr.html" title="Extraction of coordinate lookup tables from BINTABLE. ">wtbarr</a> *<a class="code" href="structwcsprm.html#ace7e0986c79d73bd3a0613034b71974f">m_wtb</a>;</div>
<div class="line"><a name="l01477"></a><span class="lineno"> 1477</span> };</div>
<div class="line"><a name="l01478"></a><span class="lineno"> 1478</span> </div>
<div class="line"><a name="l01479"></a><span class="lineno"> 1479</span> <span class="comment">/* Size of the wcsprm struct in int units, used by the Fortran wrappers. */</span></div>
<div class="line"><a name="l01480"></a><span class="lineno"><a class="code" href="wcs_8h.html#a6852f6dd2883c82296f1108b897d337e"> 1480</a></span> <span class="preprocessor">#define WCSLEN (sizeof(struct wcsprm)/sizeof(int))</span></div>
<div class="line"><a name="l01481"></a><span class="lineno"> 1481</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l01482"></a><span class="lineno"> 1482</span> </div>
<div class="line"><a name="l01483"></a><span class="lineno"> 1483</span> <span class="keywordtype">int</span> <a class="code" href="wcs_8h.html#a42b2578d76ace7ca6114d82b7ae46a89" title="Memory allocation for PVi_ma. ">wcsnpv</a>(<span class="keywordtype">int</span> n);</div>
<div class="line"><a name="l01484"></a><span class="lineno"> 1484</span> </div>
<div class="line"><a name="l01485"></a><span class="lineno"> 1485</span> <span class="keywordtype">int</span> <a class="code" href="wcs_8h.html#ae790c9ce6c9b7a4845cf1c3c97b1e97a" title="Memory allocation for PSi_ma. ">wcsnps</a>(<span class="keywordtype">int</span> n);</div>
<div class="line"><a name="l01486"></a><span class="lineno"> 1486</span> </div>
<div class="line"><a name="l01487"></a><span class="lineno"> 1487</span> <span class="keywordtype">int</span> <a class="code" href="wcs_8h.html#a2afc8255fde0965dddaa374463666d45" title="Default constructor for the wcsprm struct. ">wcsini</a>(<span class="keywordtype">int</span> alloc, <span class="keywordtype">int</span> naxis, <span class="keyword">struct</span> <a class="code" href="structwcsprm.html" title="Coordinate transformation parameters. ">wcsprm</a> *wcs);</div>
<div class="line"><a name="l01488"></a><span class="lineno"> 1488</span> </div>
<div class="line"><a name="l01489"></a><span class="lineno"> 1489</span> <span class="keywordtype">int</span> <a class="code" href="wcs_8h.html#a864c99fef9f3eee29085ce42d0ee0d64" title="Subimage extraction routine for the wcsprm struct. ">wcssub</a>(<span class="keywordtype">int</span> alloc, <span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structwcsprm.html" title="Coordinate transformation parameters. ">wcsprm</a> *wcssrc, <span class="keywordtype">int</span> *nsub, <span class="keywordtype">int</span> axes[],</div>
<div class="line"><a name="l01490"></a><span class="lineno"> 1490</span>  <span class="keyword">struct</span> <a class="code" href="structwcsprm.html" title="Coordinate transformation parameters. ">wcsprm</a> *wcsdst);</div>
<div class="line"><a name="l01491"></a><span class="lineno"> 1491</span> </div>
<div class="line"><a name="l01492"></a><span class="lineno"> 1492</span> <span class="keywordtype">int</span> <a class="code" href="wcs_8h.html#a4ab38bc642c4656f62c43acf84a849f1" title="Destructor for the wcsprm struct. ">wcsfree</a>(<span class="keyword">struct</span> <a class="code" href="structwcsprm.html" title="Coordinate transformation parameters. ">wcsprm</a> *wcs);</div>
<div class="line"><a name="l01493"></a><span class="lineno"> 1493</span> </div>
<div class="line"><a name="l01494"></a><span class="lineno"> 1494</span> <span class="keywordtype">int</span> <a class="code" href="wcs_8h.html#ab9aeb8cf1afb1bfb22e989580d90fca8" title="Print routine for the wcsprm struct. ">wcsprt</a>(<span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structwcsprm.html" title="Coordinate transformation parameters. ">wcsprm</a> *wcs);</div>
<div class="line"><a name="l01495"></a><span class="lineno"> 1495</span> </div>
<div class="line"><a name="l01496"></a><span class="lineno"> 1496</span> <span class="keywordtype">int</span> <a class="code" href="wcs_8h.html#a8fe5dcd9927240dc0348b850ee662367" title="Print error messages from a wcsprm struct. ">wcsperr</a>(<span class="keyword">const</span> <span class="keyword">struct</span> <a class="code" href="structwcsprm.html" title="Coordinate transformation parameters. ">wcsprm</a> *wcs, <span class="keyword">const</span> <span class="keywordtype">char</span> *prefix);</div>
<div class="line"><a name="l01497"></a><span class="lineno"> 1497</span> </div>
<div class="line"><a name="l01498"></a><span class="lineno"> 1498</span> <span class="keywordtype">int</span> <a class="code" href="wcs_8h.html#ae5cc3f5d249755583403cdf54d2ebb91" title="Setup routine for the wcsprm struct. ">wcsset</a>(<span class="keyword">struct</span> <a class="code" href="structwcsprm.html" title="Coordinate transformation parameters. ">wcsprm</a> *wcs);</div>
<div class="line"><a name="l01499"></a><span class="lineno"> 1499</span> </div>
<div class="line"><a name="l01500"></a><span class="lineno"> 1500</span> <span class="keywordtype">int</span> <a class="code" href="wcs_8h.html#a27d3dd209db3e76cf4c50f48c01ba986" title="Pixel-to-world transformation. ">wcsp2s</a>(<span class="keyword">struct</span> <a class="code" href="structwcsprm.html" title="Coordinate transformation parameters. ">wcsprm</a> *wcs, <span class="keywordtype">int</span> ncoord, <span class="keywordtype">int</span> nelem, <span class="keyword">const</span> <span class="keywordtype">double</span> pixcrd[],</div>
<div class="line"><a name="l01501"></a><span class="lineno"> 1501</span>  <span class="keywordtype">double</span> imgcrd[], <span class="keywordtype">double</span> phi[], <span class="keywordtype">double</span> theta[], <span class="keywordtype">double</span> world[],</div>
<div class="line"><a name="l01502"></a><span class="lineno"> 1502</span>  <span class="keywordtype">int</span> stat[]);</div>
<div class="line"><a name="l01503"></a><span class="lineno"> 1503</span> </div>
<div class="line"><a name="l01504"></a><span class="lineno"> 1504</span> <span class="keywordtype">int</span> <a class="code" href="wcs_8h.html#a60673d05a3513659ac848a9cb3d0cb07" title="World-to-pixel transformation. ">wcss2p</a>(<span class="keyword">struct</span> <a class="code" href="structwcsprm.html" title="Coordinate transformation parameters. ">wcsprm</a> *wcs, <span class="keywordtype">int</span> ncoord, <span class="keywordtype">int</span> nelem, <span class="keyword">const</span> <span class="keywordtype">double</span> world[],</div>
<div class="line"><a name="l01505"></a><span class="lineno"> 1505</span>  <span class="keywordtype">double</span> phi[], <span class="keywordtype">double</span> theta[], <span class="keywordtype">double</span> imgcrd[], <span class="keywordtype">double</span> pixcrd[],</div>
<div class="line"><a name="l01506"></a><span class="lineno"> 1506</span>  <span class="keywordtype">int</span> stat[]);</div>
<div class="line"><a name="l01507"></a><span class="lineno"> 1507</span> </div>
<div class="line"><a name="l01508"></a><span class="lineno"> 1508</span> <span class="keywordtype">int</span> <a class="code" href="wcs_8h.html#af3f00b876c8212d43f32a51feeadaa81" title="Hybrid coordinate transformation. ">wcsmix</a>(<span class="keyword">struct</span> <a class="code" href="structwcsprm.html" title="Coordinate transformation parameters. ">wcsprm</a> *wcs, <span class="keywordtype">int</span> mixpix, <span class="keywordtype">int</span> mixcel, <span class="keyword">const</span> <span class="keywordtype">double</span> vspan[],</div>
<div class="line"><a name="l01509"></a><span class="lineno"> 1509</span>  <span class="keywordtype">double</span> vstep, <span class="keywordtype">int</span> viter, <span class="keywordtype">double</span> world[], <span class="keywordtype">double</span> phi[],</div>
<div class="line"><a name="l01510"></a><span class="lineno"> 1510</span>  <span class="keywordtype">double</span> theta[], <span class="keywordtype">double</span> imgcrd[], <span class="keywordtype">double</span> pixcrd[]);</div>
<div class="line"><a name="l01511"></a><span class="lineno"> 1511</span> </div>
<div class="line"><a name="l01512"></a><span class="lineno"> 1512</span> <span class="keywordtype">int</span> <a class="code" href="wcs_8h.html#a57975833fe0588eb7c7b6d79f13a7693" title="Spectral axis translation. ">wcssptr</a>(<span class="keyword">struct</span> <a class="code" href="structwcsprm.html" title="Coordinate transformation parameters. ">wcsprm</a> *wcs, <span class="keywordtype">int</span> *<a class="code" href="structwtbarr.html#a8743b84c99b4b5e7ab7bf0653507a180">i</a>, <span class="keywordtype">char</span> ctype[9]);</div>
<div class="line"><a name="l01513"></a><span class="lineno"> 1513</span> </div>
<div class="line"><a name="l01514"></a><span class="lineno"> 1514</span> <span class="comment">/* Defined mainly for backwards compatibility, use wcssub() instead. */</span></div>
<div class="line"><a name="l01515"></a><span class="lineno"><a class="code" href="wcs_8h.html#ac55946dadc53ac592cb686275902ae7b"> 1515</a></span> <span class="preprocessor">#define wcscopy(alloc, wcssrc, wcsdst) wcssub(alloc, wcssrc, 0x0, 0x0, wcsdst)</span></div>
<div class="line"><a name="l01516"></a><span class="lineno"> 1516</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l01517"></a><span class="lineno"> 1517</span> </div>
<div class="line"><a name="l01518"></a><span class="lineno"> 1518</span> <span class="comment">/* Deprecated. */</span></div>
<div class="line"><a name="l01519"></a><span class="lineno"><a class="code" href="wcs_8h.html#a1bcf49cfe1ed1bb2bc4c930f98d808fa"> 1519</a></span> <span class="preprocessor">#define wcsini_errmsg wcs_errmsg</span></div>
<div class="line"><a name="l01520"></a><span class="lineno"><a class="code" href="wcs_8h.html#a465ef3c77aaf546324dae0692e6de7fe"> 1520</a></span> <span class="preprocessor"></span><span class="preprocessor">#define wcssub_errmsg wcs_errmsg</span></div>
<div class="line"><a name="l01521"></a><span class="lineno"><a class="code" href="wcs_8h.html#ae1738854472218541bda531653ef2709"> 1521</a></span> <span class="preprocessor"></span><span class="preprocessor">#define wcscopy_errmsg wcs_errmsg</span></div>
<div class="line"><a name="l01522"></a><span class="lineno"><a class="code" href="wcs_8h.html#a3d64b57cec404114c75bd25a562e8053"> 1522</a></span> <span class="preprocessor"></span><span class="preprocessor">#define wcsfree_errmsg wcs_errmsg</span></div>
<div class="line"><a name="l01523"></a><span class="lineno"><a class="code" href="wcs_8h.html#a8f5c31a6983b17abbe2fead61550d55c"> 1523</a></span> <span class="preprocessor"></span><span class="preprocessor">#define wcsprt_errmsg wcs_errmsg</span></div>
<div class="line"><a name="l01524"></a><span class="lineno"><a class="code" href="wcs_8h.html#a84a67c964e212bbf004c264b3ca70fee"> 1524</a></span> <span class="preprocessor"></span><span class="preprocessor">#define wcsset_errmsg wcs_errmsg</span></div>
<div class="line"><a name="l01525"></a><span class="lineno"><a class="code" href="wcs_8h.html#ade3959355dc9d0987e7ccc4070795c38"> 1525</a></span> <span class="preprocessor"></span><span class="preprocessor">#define wcsp2s_errmsg wcs_errmsg</span></div>
<div class="line"><a name="l01526"></a><span class="lineno"><a class="code" href="wcs_8h.html#a37c4884cf58baf25b2984ec3bccb80a5"> 1526</a></span> <span class="preprocessor"></span><span class="preprocessor">#define wcss2p_errmsg wcs_errmsg</span></div>
<div class="line"><a name="l01527"></a><span class="lineno"><a class="code" href="wcs_8h.html#acfbadc770489b6b5186b95eaa35467f1"> 1527</a></span> <span class="preprocessor"></span><span class="preprocessor">#define wcsmix_errmsg wcs_errmsg</span></div>
<div class="line"><a name="l01528"></a><span class="lineno"> 1528</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l01529"></a><span class="lineno"> 1529</span> <span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a name="l01530"></a><span class="lineno"> 1530</span> <span class="preprocessor"></span><span class="preprocessor">#undef wtbarr</span></div>
<div class="line"><a name="l01531"></a><span class="lineno"> 1531</span> <span class="preprocessor"></span>}</div>
<div class="line"><a name="l01532"></a><span class="lineno"> 1532</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l01533"></a><span class="lineno"> 1533</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l01534"></a><span class="lineno"> 1534</span> <span class="preprocessor">#endif </span><span class="comment">/* WCSLIB_WCS */</span><span class="preprocessor"></span></div>
</div><!-- fragment --></div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated on Sat Jul 13 2013 20:00:26 for WCSLIB 4.18 by  <a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/>
</a> 1.8.4
</small></address>
</body>
</html>
