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<h1>geo_keyp.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/**********************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"> *</span>
<a name="l00003"></a>00003 <span class="comment"> * geo_keyp.h - private interface for GeoTIFF geokey tag parsing</span>
<a name="l00004"></a>00004 <span class="comment"> *</span>
<a name="l00005"></a>00005 <span class="comment"> * Written by: Niles D. Ritter</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> **********************************************************************/</span>
<a name="l00008"></a>00008
<a name="l00009"></a>00009 <span class="preprocessor">#ifndef __geo_keyp_h_</span>
<a name="l00010"></a>00010 <span class="preprocessor"></span><span class="preprocessor">#define __geo_keyp_h_</span>
<a name="l00011"></a>00011 <span class="preprocessor"></span>
<a name="l00012"></a>00012 <span class="preprocessor">#include <stdlib.h></span> <span class="comment">/* for size_t */</span>
<a name="l00013"></a>00013
<a name="l00014"></a>00014 <span class="comment">/*</span>
<a name="l00015"></a>00015 <span class="comment"> * This structure contains the internal program</span>
<a name="l00016"></a>00016 <span class="comment"> * representation of the key entry.</span>
<a name="l00017"></a>00017 <span class="comment"> */</span>
<a name="l00018"></a>00018 <span class="keyword">struct </span>GeoKey {
<a name="l00019"></a>00019 <span class="keywordtype">int</span> gk_key; <span class="comment">/* GeoKey ID */</span>
<a name="l00020"></a>00020 <span class="keywordtype">size_t</span> gk_size; <span class="comment">/* data byte size */</span>
<a name="l00021"></a>00021 tagtype_t gk_type; <span class="comment">/* TIFF data type */</span>
<a name="l00022"></a>00022 <span class="keywordtype">long</span> gk_count; <span class="comment">/* number of values */</span>
<a name="l00023"></a>00023 <span class="keywordtype">char</span>* gk_data; <span class="comment">/* pointer to data, or value */</span>
<a name="l00024"></a>00024 };
<a name="l00025"></a>00025 <span class="keyword">typedef</span> <span class="keyword">struct </span>GeoKey GeoKey;
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="comment">/*</span>
<a name="l00028"></a>00028 <span class="comment"> * This structure represents the file-organization of</span>
<a name="l00029"></a>00029 <span class="comment"> * the key entry. Note that it assumes that short entries</span>
<a name="l00030"></a>00030 <span class="comment"> * are aligned along 2-byte boundaries.</span>
<a name="l00031"></a>00031 <span class="comment"> */</span>
<a name="l00032"></a>00032 <span class="keyword">struct </span>KeyEntry {
<a name="l00033"></a>00033 pinfo_t ent_key; <span class="comment">/* GeoKey ID */</span>
<a name="l00034"></a>00034 pinfo_t ent_location; <span class="comment">/* TIFF Tag ID or 0 */</span>
<a name="l00035"></a>00035 pinfo_t ent_count; <span class="comment">/* GeoKey value count */</span>
<a name="l00036"></a>00036 pinfo_t ent_val_offset; <span class="comment">/* value or tag offset */</span>
<a name="l00037"></a>00037 };
<a name="l00038"></a>00038 <span class="keyword">typedef</span> <span class="keyword">struct </span>KeyEntry KeyEntry;
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">/*</span>
<a name="l00041"></a>00041 <span class="comment"> * This is the header of the CoordSystemInfoTag. The 'Version'</span>
<a name="l00042"></a>00042 <span class="comment"> * will only change if the CoorSystemInfoTag structure changes;</span>
<a name="l00043"></a>00043 <span class="comment"> * The Major Revision will be incremented whenever a new set of</span>
<a name="l00044"></a>00044 <span class="comment"> * Keys is added or changed, while the Minor revision will be</span>
<a name="l00045"></a>00045 <span class="comment"> * incremented when only the set of Key-values is increased.</span>
<a name="l00046"></a>00046 <span class="comment"> */</span>
<a name="l00047"></a>00047 <span class="keyword">struct </span>KeyHeader{
<a name="l00048"></a>00048 pinfo_t hdr_version; <span class="comment">/* GeoTIFF Version */</span>
<a name="l00049"></a>00049 pinfo_t hdr_rev_major; <span class="comment">/* GeoKey Major Revision # */</span>
<a name="l00050"></a>00050 pinfo_t hdr_rev_minor; <span class="comment">/* GeoKey Minor Revision # */</span>
<a name="l00051"></a>00051 pinfo_t hdr_num_keys; <span class="comment">/* Number of GeoKeys */</span>
<a name="l00052"></a>00052 };
<a name="l00053"></a>00053 <span class="keyword">typedef</span> <span class="keyword">struct </span>KeyHeader KeyHeader;
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="comment">/*</span>
<a name="l00056"></a>00056 <span class="comment"> * This structure holds temporary data while reading or writing</span>
<a name="l00057"></a>00057 <span class="comment"> * the tags.</span>
<a name="l00058"></a>00058 <span class="comment"> */</span>
<a name="l00059"></a>00059 <span class="keyword">struct </span>TempKeyData {
<a name="l00060"></a>00060 <span class="keywordtype">char</span> *tk_asciiParams;
<a name="l00061"></a>00061 <span class="keywordtype">int</span> tk_asciiParamsLength;
<a name="l00062"></a>00062 <span class="keywordtype">int</span> tk_asciiParamsOffset;
<a name="l00063"></a>00063 };
<a name="l00064"></a>00064 <span class="keyword">typedef</span> <span class="keyword">struct </span>TempKeyData TempKeyData;
<a name="l00065"></a>00065
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="keyword">struct </span>gtiff {
<a name="l00068"></a>00068 tiff_t* gt_tif; <span class="comment">/* TIFF file descriptor */</span>
<a name="l00069"></a>00069 <span class="keyword">struct </span>_TIFFMethod gt_methods; <span class="comment">/* TIFF i/o methods */</span>
<a name="l00070"></a>00070 <span class="keywordtype">int</span> gt_flags; <span class="comment">/* file flags */</span>
<a name="l00071"></a>00071
<a name="l00072"></a>00072 pinfo_t gt_version; <span class="comment">/* GeoTIFF Version */</span>
<a name="l00073"></a>00073 pinfo_t gt_rev_major;<span class="comment">/* GeoKey Key Revision */</span>
<a name="l00074"></a>00074 pinfo_t gt_rev_minor;<span class="comment">/* GeoKey Code Revision */</span>
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="keywordtype">int</span> gt_num_keys; <span class="comment">/* number of keys */</span>
<a name="l00077"></a>00077 GeoKey* gt_keys; <span class="comment">/* array of keys */</span>
<a name="l00078"></a>00078 <span class="keywordtype">int</span>* gt_keyindex; <span class="comment">/* index of a key, if set*/</span>
<a name="l00079"></a>00079 <span class="keywordtype">int</span> gt_keymin; <span class="comment">/* smallest key set */</span>
<a name="l00080"></a>00080 <span class="keywordtype">int</span> gt_keymax; <span class="comment">/* largest key set */</span>
<a name="l00081"></a>00081
<a name="l00082"></a>00082 pinfo_t* gt_short; <span class="comment">/* array of SHORT vals */</span>
<a name="l00083"></a>00083 <span class="keywordtype">double</span>* gt_double; <span class="comment">/* array of DOUBLE vals */</span>
<a name="l00084"></a>00084 <span class="keywordtype">int</span> gt_nshorts; <span class="comment">/* number of SHORT vals */</span>
<a name="l00085"></a>00085 <span class="keywordtype">int</span> gt_ndoubles; <span class="comment">/* number of DOUBLE vals */</span>
<a name="l00086"></a>00086 };
<a name="l00087"></a>00087
<a name="l00088"></a>00088 <span class="keyword">typedef</span> <span class="keyword">enum</span> {
<a name="l00089"></a>00089 FLAG_FILE_OPEN=1,
<a name="l00090"></a>00090 FLAG_FILE_MODIFIED=2
<a name="l00091"></a>00091 } gtiff_flags;
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="preprocessor">#define MAX_KEYINDEX 65535 </span><span class="comment">/* largest possible key */</span>
<a name="l00094"></a>00094 <span class="preprocessor">#define MAX_KEYS 100 </span><span class="comment">/* maximum keys in a file */</span>
<a name="l00095"></a>00095 <span class="preprocessor">#define MAX_VALUES 1000 </span><span class="comment">/* maximum values in a tag */</span>
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="preprocessor">#endif </span><span class="comment">/* __geo_keyp_h_ */</span>
<a name="l00098"></a>00098
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