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<div id="projectname">libdap++ <span id="projectnumber">Updated for version 3.8.2</span></div>
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<h1>escaping.cc</h1> </div>
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<a href="escaping_8cc.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
<a name="l00002"></a>00002 <span class="comment">// -*- mode: c++; c-basic-offset:4 -*-</span>
<a name="l00003"></a>00003
<a name="l00004"></a>00004 <span class="comment">// This file is part of libdap, A C++ implementation of the OPeNDAP Data</span>
<a name="l00005"></a>00005 <span class="comment">// Access Protocol.</span>
<a name="l00006"></a>00006
<a name="l00007"></a>00007 <span class="comment">// Copyright (c) 2002,2003 OPeNDAP, Inc.</span>
<a name="l00008"></a>00008 <span class="comment">// Author: James Gallagher <jgallagher@opendap.org></span>
<a name="l00009"></a>00009 <span class="comment">//</span>
<a name="l00010"></a>00010 <span class="comment">// This library is free software; you can redistribute it and/or</span>
<a name="l00011"></a>00011 <span class="comment">// modify it under the terms of the GNU Lesser General Public</span>
<a name="l00012"></a>00012 <span class="comment">// License as published by the Free Software Foundation; either</span>
<a name="l00013"></a>00013 <span class="comment">// version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00014"></a>00014 <span class="comment">//</span>
<a name="l00015"></a>00015 <span class="comment">// This library is distributed in the hope that it will be useful,</span>
<a name="l00016"></a>00016 <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00017"></a>00017 <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00018"></a>00018 <span class="comment">// Lesser General Public License for more details.</span>
<a name="l00019"></a>00019 <span class="comment">//</span>
<a name="l00020"></a>00020 <span class="comment">// You should have received a copy of the GNU Lesser General Public</span>
<a name="l00021"></a>00021 <span class="comment">// License along with this library; if not, write to the Free Software</span>
<a name="l00022"></a>00022 <span class="comment">// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
<a name="l00023"></a>00023 <span class="comment">//</span>
<a name="l00024"></a>00024 <span class="comment">// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="comment">// Copyright (c) 1996, California Institute of Technology.</span>
<a name="l00027"></a>00027 <span class="comment">// ALL RIGHTS RESERVED. U.S. Government Sponsorship acknowledged.</span>
<a name="l00028"></a>00028 <span class="comment">//</span>
<a name="l00029"></a>00029 <span class="comment">// Please read the full copyright notice in the file COPYRIGHT_URI</span>
<a name="l00030"></a>00030 <span class="comment">// in this directory.</span>
<a name="l00031"></a>00031 <span class="comment">//</span>
<a name="l00032"></a>00032 <span class="comment">// Author: Todd Karakashian, NASA/Jet Propulsion Laboratory</span>
<a name="l00033"></a>00033 <span class="comment">// Todd.K.Karakashian@jpl.nasa.gov</span>
<a name="l00034"></a>00034 <span class="comment">//</span>
<a name="l00035"></a>00035 <span class="comment">// $RCSfile: escaping.cc,v $ - Miscellaneous routines for OPeNDAP HDF server</span>
<a name="l00036"></a>00036 <span class="comment">//</span>
<a name="l00037"></a>00037 <span class="comment">// These two routines are for escaping/unescaping strings that are identifiers</span>
<a name="l00038"></a>00038 <span class="comment">// in DAP2</span>
<a name="l00039"></a>00039 <span class="comment">// id2www() -- escape (using WWW hex codes) non-allowable characters in a</span>
<a name="l00040"></a>00040 <span class="comment">// DAP2 identifier</span>
<a name="l00041"></a>00041 <span class="comment">// www2id() -- given an WWW hexcode escaped identifier, restore it</span>
<a name="l00042"></a>00042 <span class="comment">//</span>
<a name="l00043"></a>00043 <span class="comment">// These two routines are for escaping/unescaping strings storing attribute</span>
<a name="l00044"></a>00044 <span class="comment">// values. They use traditional octal escapes (\nnn) because they are</span>
<a name="l00045"></a>00045 <span class="comment">// intended to be viewed by a user</span>
<a name="l00046"></a>00046 <span class="comment">// escattr() -- escape (using traditional octal backslash) non-allowable</span>
<a name="l00047"></a>00047 <span class="comment">// characters in the value of a DAP2 attribute</span>
<a name="l00048"></a>00048 <span class="comment">// unescattr() -- given an octally escaped string, restore it</span>
<a name="l00049"></a>00049 <span class="comment">//</span>
<a name="l00050"></a>00050 <span class="comment">// These are routines used by the above, not intended to be called directly:</span>
<a name="l00051"></a>00051 <span class="comment">//</span>
<a name="l00052"></a>00052 <span class="comment">// hexstring()</span>
<a name="l00053"></a>00053 <span class="comment">// unhexstring()</span>
<a name="l00054"></a>00054 <span class="comment">// octstring()</span>
<a name="l00055"></a>00055 <span class="comment">// unoctstring()</span>
<a name="l00056"></a>00056 <span class="comment">//</span>
<a name="l00057"></a>00057 <span class="comment">// -Todd</span>
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="preprocessor">#include <ctype.h></span>
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="preprocessor">#include <iomanip></span>
<a name="l00062"></a>00062 <span class="preprocessor">#include <string></span>
<a name="l00063"></a>00063 <span class="preprocessor">#include <sstream></span>
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="preprocessor">#include "GNURegex.h"</span>
<a name="l00066"></a>00066 <span class="preprocessor">#include "<a class="code" href="Error_8h.html">Error.h</a>"</span>
<a name="l00067"></a>00067 <span class="preprocessor">#include "<a class="code" href="InternalErr_8h.html">InternalErr.h</a>"</span>
<a name="l00068"></a>00068 <span class="comment">//#define DODS_DEBUG</span>
<a name="l00069"></a>00069 <span class="preprocessor">#include "<a class="code" href="debug_8h.html">debug.h</a>"</span>
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="keyword">using namespace </span>std;
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="keyword">namespace </span>libdap {
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="comment">// The next four functions were originally defined static, but I removed that</span>
<a name="l00076"></a>00076 <span class="comment">// to make testing them (see generalUtilTest.cc) easier to write. 5/7/2001</span>
<a name="l00077"></a>00077 <span class="comment">// jhrg</span>
<a name="l00078"></a>00078
<a name="l00079"></a>00079 <span class="keywordtype">string</span>
<a name="l00080"></a><a class="code" href="namespacelibdap.html#a58976ab42baea9bf93449dda9e18342a">00080</a> <a class="code" href="namespacelibdap.html#a58976ab42baea9bf93449dda9e18342a">hexstring</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> val)
<a name="l00081"></a>00081 {
<a name="l00082"></a>00082 ostringstream buf;
<a name="l00083"></a>00083 buf << hex << setw(2) << setfill('0') << static_cast<unsigned int>(val);
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="keywordflow">return</span> buf.str();
<a name="l00086"></a>00086 }
<a name="l00087"></a>00087
<a name="l00088"></a>00088 <span class="keywordtype">string</span>
<a name="l00089"></a><a class="code" href="namespacelibdap.html#a9a3ca0a741a80db615410ac7dc3417f0">00089</a> <a class="code" href="namespacelibdap.html#a9a3ca0a741a80db615410ac7dc3417f0">unhexstring</a>(<span class="keywordtype">string</span> s)
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 <span class="keywordtype">int</span> val;
<a name="l00092"></a>00092 istringstream ss(s);
<a name="l00093"></a>00093 ss >> hex >> val;
<a name="l00094"></a>00094 <span class="keywordtype">char</span> tmp_str[2];
<a name="l00095"></a>00095 tmp_str[0] = <span class="keyword">static_cast<</span><span class="keywordtype">char</span><span class="keyword">></span>(val);
<a name="l00096"></a>00096 tmp_str[1] = <span class="charliteral">'\0'</span>;
<a name="l00097"></a>00097 <span class="keywordflow">return</span> string(tmp_str);
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="keywordtype">string</span>
<a name="l00101"></a><a class="code" href="namespacelibdap.html#a5efc80c1583d1a764da47096650e1455">00101</a> <a class="code" href="namespacelibdap.html#a5efc80c1583d1a764da47096650e1455">octstring</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> val)
<a name="l00102"></a>00102 {
<a name="l00103"></a>00103 ostringstream buf;
<a name="l00104"></a>00104 buf << oct << setw(3) << setfill(<span class="charliteral">'0'</span>)
<a name="l00105"></a>00105 << <span class="keyword">static_cast<</span><span class="keywordtype">unsigned</span> <span class="keywordtype">int</span><span class="keyword">></span>(val);
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="keywordflow">return</span> buf.str();
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="keywordtype">string</span>
<a name="l00111"></a><a class="code" href="namespacelibdap.html#afbc8888b9891cac063f4d77b368b1021">00111</a> <a class="code" href="namespacelibdap.html#afbc8888b9891cac063f4d77b368b1021">unoctstring</a>(<span class="keywordtype">string</span> s)
<a name="l00112"></a>00112 {
<a name="l00113"></a>00113 <span class="keywordtype">int</span> val;
<a name="l00114"></a>00114
<a name="l00115"></a>00115 istringstream ss(s);
<a name="l00116"></a>00116 ss >> oct >> val;
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <a class="code" href="debug_8h.html#a32adf79142f0a426b5e782fb7cd4cad3">DBG</a>(cerr << <span class="stringliteral">"unoctstring: "</span> << val << endl);
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="keywordtype">char</span> tmp_str[2];
<a name="l00121"></a>00121 tmp_str[0] = <span class="keyword">static_cast<</span><span class="keywordtype">char</span><span class="keyword">></span>(val);
<a name="l00122"></a>00122 tmp_str[1] = <span class="charliteral">'\0'</span>;
<a name="l00123"></a>00123 <span class="keywordflow">return</span> string(tmp_str);
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125
<a name="l00150"></a>00150 <span class="keywordtype">string</span>
<a name="l00151"></a><a class="code" href="namespacelibdap.html#afbd709ed83699c11234a213463d16b9c">00151</a> <a class="code" href="namespacelibdap.html#afbd709ed83699c11234a213463d16b9c">id2www</a>(<span class="keywordtype">string</span> in, <span class="keyword">const</span> <span class="keywordtype">string</span> &allowable)
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153 string::size_type i = 0;
<a name="l00154"></a>00154 <a class="code" href="debug_8h.html#a32adf79142f0a426b5e782fb7cd4cad3">DBG</a>(cerr<<<span class="stringliteral">"Input string: ["</span> << in << <span class="stringliteral">"]"</span> << endl);
<a name="l00155"></a>00155 <span class="keywordflow">while</span> ((i = in.find_first_not_of(allowable, i)) != string::npos) {
<a name="l00156"></a>00156 <a class="code" href="debug_8h.html#a32adf79142f0a426b5e782fb7cd4cad3">DBG</a>(cerr<<<span class="stringliteral">"Found escapee: ["</span> << in[i] << <span class="stringliteral">"]"</span>);
<a name="l00157"></a>00157 in.replace(i, 1, <span class="stringliteral">"%"</span> + <a class="code" href="namespacelibdap.html#a58976ab42baea9bf93449dda9e18342a">hexstring</a>(in[i]));
<a name="l00158"></a>00158 <a class="code" href="debug_8h.html#a0d28d57d1228cf13a4c1288cc4758344">DBGN</a>(cerr<<<span class="stringliteral">" now the string is: "</span> << in << endl);
<a name="l00159"></a>00159 i += 3;<span class="comment">//i++;</span>
<a name="l00160"></a>00160 }
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="keywordflow">return</span> in;
<a name="l00163"></a>00163 }
<a name="l00164"></a>00164
<a name="l00175"></a>00175 <span class="keywordtype">string</span>
<a name="l00176"></a><a class="code" href="namespacelibdap.html#adc33774947740cc181b6d4d7ca90e22d">00176</a> <a class="code" href="namespacelibdap.html#adc33774947740cc181b6d4d7ca90e22d">id2www_ce</a>(<span class="keywordtype">string</span> in, <span class="keyword">const</span> <span class="keywordtype">string</span> &allowable)
<a name="l00177"></a>00177 {
<a name="l00178"></a>00178 <span class="keywordflow">return</span> <a class="code" href="namespacelibdap.html#afbd709ed83699c11234a213463d16b9c">id2www</a>(in, allowable);
<a name="l00179"></a>00179 }
<a name="l00180"></a>00180
<a name="l00213"></a>00213 <span class="keywordtype">string</span>
<a name="l00214"></a><a class="code" href="namespacelibdap.html#a376f9593431111a80ef78c98b8f4a0e2">00214</a> <a class="code" href="namespacelibdap.html#a376f9593431111a80ef78c98b8f4a0e2">www2id</a>(<span class="keyword">const</span> <span class="keywordtype">string</span> &in, <span class="keyword">const</span> <span class="keywordtype">string</span> &escape, <span class="keyword">const</span> <span class="keywordtype">string</span> &except)
<a name="l00215"></a>00215 {
<a name="l00216"></a>00216 string::size_type i = 0;
<a name="l00217"></a>00217 <span class="keywordtype">string</span> res = in;
<a name="l00218"></a>00218 <span class="keywordflow">while</span> ((i = res.find_first_of(escape, i)) != string::npos) {
<a name="l00219"></a>00219 <span class="keywordflow">if</span> (except.find(res.substr(i, 3)) != string::npos) {
<a name="l00220"></a>00220 i += 3;
<a name="l00221"></a>00221 <span class="keywordflow">continue</span>;
<a name="l00222"></a>00222 }
<a name="l00223"></a>00223 res.replace(i, 3, <a class="code" href="namespacelibdap.html#a9a3ca0a741a80db615410ac7dc3417f0">unhexstring</a>(res.substr(i + 1, 2)));
<a name="l00224"></a>00224 ++i;
<a name="l00225"></a>00225 }
<a name="l00226"></a>00226
<a name="l00227"></a>00227 <span class="keywordflow">return</span> res;
<a name="l00228"></a>00228 }
<a name="l00229"></a>00229
<a name="l00230"></a>00230 <span class="keyword">static</span> <span class="keywordtype">string</span>
<a name="l00231"></a>00231 entity(<span class="keywordtype">char</span> c)
<a name="l00232"></a>00232 {
<a name="l00233"></a>00233 <span class="keywordflow">switch</span> (c) {
<a name="l00234"></a>00234 <span class="keywordflow">case</span> <span class="charliteral">'>'</span>: <span class="keywordflow">return</span> <span class="stringliteral">"&gt;"</span>;
<a name="l00235"></a>00235 <span class="keywordflow">case</span> <span class="charliteral">'<'</span>: <span class="keywordflow">return</span> <span class="stringliteral">"&lt;"</span>;
<a name="l00236"></a>00236 <span class="keywordflow">case</span> <span class="charliteral">'&'</span>: <span class="keywordflow">return</span> <span class="stringliteral">"&amp;"</span>;
<a name="l00237"></a>00237 <span class="keywordflow">case</span> <span class="charliteral">'\''</span>: <span class="keywordflow">return</span> <span class="stringliteral">"&apos;"</span>;
<a name="l00238"></a>00238 <span class="keywordflow">case</span> <span class="charliteral">'\"'</span>: <span class="keywordflow">return</span> <span class="stringliteral">"&quot;"</span>;
<a name="l00239"></a>00239 <span class="keywordflow">default</span>:
<a name="l00240"></a>00240 <span class="keywordflow">throw</span> InternalErr(__FILE__, __LINE__, <span class="stringliteral">"Unrecognized character."</span>);
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242 }
<a name="l00243"></a>00243
<a name="l00244"></a>00244 <span class="comment">// Assumption: There are always exactly two octal digits in the input</span>
<a name="l00245"></a>00245 <span class="comment">// and two hex digits in the result.</span>
<a name="l00246"></a>00246 <span class="keywordtype">string</span>
<a name="l00247"></a><a class="code" href="namespacelibdap.html#a61f9b10ef0e659cebdca50a89d8ea7c3">00247</a> <a class="code" href="namespacelibdap.html#a61f9b10ef0e659cebdca50a89d8ea7c3">octal_to_hex</a>(<span class="keyword">const</span> <span class="keywordtype">string</span> &octal_digits)
<a name="l00248"></a>00248 {
<a name="l00249"></a>00249 <span class="keywordtype">int</span> val;
<a name="l00250"></a>00250
<a name="l00251"></a>00251 istringstream ss(octal_digits);
<a name="l00252"></a>00252 ss >> oct >> val;
<a name="l00253"></a>00253
<a name="l00254"></a>00254 ostringstream ds;
<a name="l00255"></a>00255 ds << hex << setw(2) << setfill(<span class="charliteral">'0'</span>) << val;
<a name="l00256"></a>00256 <span class="keywordflow">return</span> ds.str();
<a name="l00257"></a>00257 }
<a name="l00258"></a>00258
<a name="l00265"></a>00265 <span class="keywordtype">string</span>
<a name="l00266"></a><a class="code" href="namespacelibdap.html#a62463a13bf510db3a14c0053fea14f4d">00266</a> <a class="code" href="namespacelibdap.html#a62463a13bf510db3a14c0053fea14f4d">id2xml</a>(<span class="keywordtype">string</span> in, <span class="keyword">const</span> <span class="keywordtype">string</span> &not_allowed)
<a name="l00267"></a>00267 {
<a name="l00268"></a>00268 string::size_type i = 0;
<a name="l00269"></a>00269
<a name="l00270"></a>00270 <span class="keywordflow">while</span> ((i = in.find_first_of(not_allowed, i)) != string::npos) {
<a name="l00271"></a>00271 in.replace(i, 1, entity(in[i]));
<a name="l00272"></a>00272 ++i;
<a name="l00273"></a>00273 }
<a name="l00274"></a>00274 <span class="preprocessor">#if 0</span>
<a name="l00275"></a>00275 <span class="preprocessor"></span> <span class="comment">// Removed the encoding of octal escapes. This function is used by</span>
<a name="l00276"></a>00276 <span class="comment">// AttrTable to encode the stuff that is the value of the <value></span>
<a name="l00277"></a>00277 <span class="comment">// element in the DDX. The problem is that some of the values are not</span>
<a name="l00278"></a>00278 <span class="comment">// valid UTF-8 and that makes a XML parser gag.; ticket 1512.</span>
<a name="l00279"></a>00279 <span class="comment">// jhrg 3/19/10</span>
<a name="l00280"></a>00280
<a name="l00281"></a>00281 <span class="comment">// OK, now scan for octal escape sequences like \\012 (where the '\'</span>
<a name="l00282"></a>00282 <span class="comment">// is itself escaped). This type of attribute value comes from the netCDF</span>
<a name="l00283"></a>00283 <span class="comment">// handler and maybe others. Assumption: The '\' will always appear as</span>
<a name="l00284"></a>00284 <span class="comment">// in its escaped form: '\\'. NB: Both backslashes must be escaped in the</span>
<a name="l00285"></a>00285 <span class="comment">// C++ string.</span>
<a name="l00286"></a>00286 <span class="keywordtype">string</span> octal_escape = <span class="stringliteral">"\\\\"</span>;
<a name="l00287"></a>00287 i = 0;
<a name="l00288"></a>00288 string::size_type length = in.length();
<a name="l00289"></a>00289 <span class="keywordflow">while</span> ((i = in.find(octal_escape, i)) != string::npos) {
<a name="l00290"></a>00290 <span class="comment">// Get the three octal digits following the '\\0'</span>
<a name="l00291"></a>00291 string::size_type j = i + 2;
<a name="l00292"></a>00292 <span class="keywordflow">if</span> (j + 1 >= length) <span class="comment">// Check that we're not past the end</span>
<a name="l00293"></a>00293 <span class="keywordflow">break</span>;
<a name="l00294"></a>00294 <span class="keywordtype">string</span> octal_digits = in.substr(j, 3);
<a name="l00295"></a>00295 <span class="comment">// convert to a &#xdd; XML escape</span>
<a name="l00296"></a>00296 <span class="keywordtype">string</span> hex_escape = string(<span class="stringliteral">"&#x"</span>);
<a name="l00297"></a>00297 hex_escape.append(<a class="code" href="namespacelibdap.html#a61f9b10ef0e659cebdca50a89d8ea7c3">octal_to_hex</a>(octal_digits));
<a name="l00298"></a>00298 hex_escape.append(<span class="keywordtype">string</span>(<span class="stringliteral">";"</span>));
<a name="l00299"></a>00299
<a name="l00300"></a>00300 <span class="comment">// replace the octal escape with an XML/hex escape</span>
<a name="l00301"></a>00301 in.replace(i, 5, hex_escape);
<a name="l00302"></a>00302
<a name="l00303"></a>00303 <span class="comment">// increment i</span>
<a name="l00304"></a>00304 i += 6;
<a name="l00305"></a>00305 }
<a name="l00306"></a>00306 <span class="preprocessor">#endif</span>
<a name="l00307"></a>00307 <span class="preprocessor"></span> <span class="keywordflow">return</span> in;
<a name="l00308"></a>00308 }
<a name="l00309"></a>00309
<a name="l00315"></a>00315 <span class="keywordtype">string</span>
<a name="l00316"></a><a class="code" href="namespacelibdap.html#a613e8502fe2c16fd938d1bd9065fceb0">00316</a> <a class="code" href="namespacelibdap.html#a613e8502fe2c16fd938d1bd9065fceb0">xml2id</a>(<span class="keywordtype">string</span> in)
<a name="l00317"></a>00317 {
<a name="l00318"></a>00318 string::size_type i = 0;
<a name="l00319"></a>00319
<a name="l00320"></a>00320 <span class="keywordflow">while</span> ((i = in.find(<span class="stringliteral">"&gt;"</span>, i)) != string::npos)
<a name="l00321"></a>00321 in.replace(i, 4, <span class="stringliteral">">"</span>);
<a name="l00322"></a>00322
<a name="l00323"></a>00323 i = 0;
<a name="l00324"></a>00324 <span class="keywordflow">while</span> ((i = in.find(<span class="stringliteral">"&lt;"</span>, i)) != string::npos)
<a name="l00325"></a>00325 in.replace(i, 4, <span class="stringliteral">"<"</span>);
<a name="l00326"></a>00326
<a name="l00327"></a>00327 i = 0;
<a name="l00328"></a>00328 <span class="keywordflow">while</span> ((i = in.find(<span class="stringliteral">"&amp;"</span>, i)) != string::npos)
<a name="l00329"></a>00329 in.replace(i, 5, <span class="stringliteral">"&"</span>);
<a name="l00330"></a>00330
<a name="l00331"></a>00331 i = 0;
<a name="l00332"></a>00332 <span class="keywordflow">while</span> ((i = in.find(<span class="stringliteral">"&apos;"</span>, i)) != string::npos)
<a name="l00333"></a>00333 in.replace(i, 6, <span class="stringliteral">"'"</span>);
<a name="l00334"></a>00334
<a name="l00335"></a>00335 i = 0;
<a name="l00336"></a>00336 <span class="keywordflow">while</span> ((i = in.find(<span class="stringliteral">"&quot;"</span>, i)) != string::npos)
<a name="l00337"></a>00337 in.replace(i, 6, <span class="stringliteral">"\""</span>);
<a name="l00338"></a>00338
<a name="l00339"></a>00339 <span class="keywordflow">return</span> in;
<a name="l00340"></a>00340 }
<a name="l00341"></a>00341
<a name="l00347"></a>00347 <span class="keywordtype">string</span>
<a name="l00348"></a><a class="code" href="namespacelibdap.html#a164a636683af9444c41c17c84d88e5f7">00348</a> <a class="code" href="namespacelibdap.html#a164a636683af9444c41c17c84d88e5f7">esc2underscore</a>(<span class="keywordtype">string</span> s)
<a name="l00349"></a>00349 {
<a name="l00350"></a>00350 string::size_type pos;
<a name="l00351"></a>00351 <span class="keywordflow">while</span> ((pos = s.find(<span class="charliteral">'%'</span>)) != string::npos)
<a name="l00352"></a>00352 s.replace(pos, 3, <span class="stringliteral">"_"</span>);
<a name="l00353"></a>00353
<a name="l00354"></a>00354 <span class="keywordflow">return</span> s;
<a name="l00355"></a>00355 }
<a name="l00356"></a>00356
<a name="l00357"></a>00357
<a name="l00361"></a>00361 <span class="keywordtype">string</span>
<a name="l00362"></a><a class="code" href="namespacelibdap.html#a17b72fe083734a5fefaf5542f640d87e">00362</a> <a class="code" href="namespacelibdap.html#a17b72fe083734a5fefaf5542f640d87e">escattr</a>(<span class="keywordtype">string</span> s)
<a name="l00363"></a>00363 {
<a name="l00364"></a>00364 <span class="keyword">const</span> <span class="keywordtype">string</span> printable = <span class="stringliteral">" ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789~`!@#$%^&*()_-+={[}]|\\:;<,>.?/'\""</span>;
<a name="l00365"></a>00365 <span class="keyword">const</span> <span class="keywordtype">string</span> ESC = <span class="stringliteral">"\\"</span>;
<a name="l00366"></a>00366 <span class="keyword">const</span> <span class="keywordtype">string</span> DOUBLE_ESC = ESC + ESC;
<a name="l00367"></a>00367 <span class="keyword">const</span> <span class="keywordtype">string</span> QUOTE = <span class="stringliteral">"\""</span>;
<a name="l00368"></a>00368 <span class="keyword">const</span> <span class="keywordtype">string</span> ESCQUOTE = ESC + QUOTE;
<a name="l00369"></a>00369
<a name="l00370"></a>00370 <span class="comment">// escape non-printing characters with octal escape</span>
<a name="l00371"></a>00371 string::size_type ind = 0;
<a name="l00372"></a>00372 <span class="keywordflow">while</span> ((ind = s.find_first_not_of(printable, ind)) != s.npos)
<a name="l00373"></a>00373 s.replace(ind, 1, ESC + <a class="code" href="namespacelibdap.html#a5efc80c1583d1a764da47096650e1455">octstring</a>(s[ind]));
<a name="l00374"></a>00374
<a name="l00375"></a>00375 <span class="comment">// escape \ with a second backslash</span>
<a name="l00376"></a>00376 ind = 0;
<a name="l00377"></a>00377 <span class="keywordflow">while</span> ((ind = s.find(ESC, ind)) != s.npos) {
<a name="l00378"></a>00378 s.replace(ind, 1, DOUBLE_ESC);
<a name="l00379"></a>00379 ind += DOUBLE_ESC.length();
<a name="l00380"></a>00380 }
<a name="l00381"></a>00381
<a name="l00382"></a>00382 <span class="comment">// escape " with backslash</span>
<a name="l00383"></a>00383 ind = 0;
<a name="l00384"></a>00384 <span class="keywordflow">while</span> ((ind = s.find(QUOTE, ind)) != s.npos) {
<a name="l00385"></a>00385 s.replace(ind, 1, ESCQUOTE);
<a name="l00386"></a>00386 ind += ESCQUOTE.length();
<a name="l00387"></a>00387 }
<a name="l00388"></a>00388
<a name="l00389"></a>00389 <span class="keywordflow">return</span> s;
<a name="l00390"></a>00390 }
<a name="l00391"></a>00391
<a name="l00400"></a>00400 <span class="keywordtype">string</span>
<a name="l00401"></a><a class="code" href="namespacelibdap.html#a8ea51bd234898fe461d77dfbe3a678fe">00401</a> <a class="code" href="namespacelibdap.html#a8ea51bd234898fe461d77dfbe3a678fe">unescattr</a>(<span class="keywordtype">string</span> s)
<a name="l00402"></a>00402 {
<a name="l00403"></a>00403 Regex octal(<span class="stringliteral">"\\\\[0-3][0-7][0-7]"</span>); <span class="comment">// matches 4 characters</span>
<a name="l00404"></a>00404 Regex esc_quote(<span class="stringliteral">"\\\\\""</span>); <span class="comment">// matches 3 characters</span>
<a name="l00405"></a>00405 Regex esc_esc(<span class="stringliteral">"\\\\\\\\"</span>); <span class="comment">// matches 2 characters</span>
<a name="l00406"></a>00406 <span class="keyword">const</span> <span class="keywordtype">string</span> ESC = <span class="stringliteral">"\\"</span>;
<a name="l00407"></a>00407 <span class="keyword">const</span> <span class="keywordtype">string</span> QUOTE = <span class="stringliteral">"\""</span>;
<a name="l00408"></a>00408 <span class="keywordtype">int</span> matchlen;
<a name="l00409"></a>00409 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> index;
<a name="l00410"></a>00410
<a name="l00411"></a>00411 <a class="code" href="debug_8h.html#a32adf79142f0a426b5e782fb7cd4cad3">DBG</a>(cerr << <span class="stringliteral">"0XX"</span> << s << <span class="stringliteral">"XXX"</span> << endl);
<a name="l00412"></a>00412 <span class="comment">// unescape any escaped backslashes</span>
<a name="l00413"></a>00413 index = esc_esc.search(s.c_str(), s.length(), matchlen, 0);
<a name="l00414"></a>00414 <span class="keywordflow">while</span> (index < s.length()) {
<a name="l00415"></a>00415 <a class="code" href="debug_8h.html#a32adf79142f0a426b5e782fb7cd4cad3">DBG</a>(cerr << <span class="stringliteral">"1aXX"</span> << s << <span class="stringliteral">"XXX index: "</span> << index << endl);
<a name="l00416"></a>00416 s.replace(index, 2, ESC);
<a name="l00417"></a>00417 <a class="code" href="debug_8h.html#a32adf79142f0a426b5e782fb7cd4cad3">DBG</a>(cerr << <span class="stringliteral">"1bXX"</span> << s << <span class="stringliteral">"XXX index: "</span> << index << endl);
<a name="l00418"></a>00418 index = esc_esc.search(s.c_str(), s.length(), matchlen, 0);
<a name="l00419"></a>00419 }
<a name="l00420"></a>00420
<a name="l00421"></a>00421 <span class="comment">// unescape any escaped double quote characters</span>
<a name="l00422"></a>00422 index = esc_quote.search(s.c_str(), s.length(), matchlen, 0);
<a name="l00423"></a>00423 <span class="keywordflow">while</span> (index < s.length()) {
<a name="l00424"></a>00424 s.replace(index, 2, QUOTE);
<a name="l00425"></a>00425 <a class="code" href="debug_8h.html#a32adf79142f0a426b5e782fb7cd4cad3">DBG</a>(cerr << <span class="stringliteral">"2XX"</span> << s << <span class="stringliteral">"XXX index: "</span> << index << endl);
<a name="l00426"></a>00426 index = esc_quote.search(s.c_str(), s.length(), matchlen, 0);
<a name="l00427"></a>00427 }
<a name="l00428"></a>00428
<a name="l00429"></a>00429 <span class="comment">// unescape octal characters</span>
<a name="l00430"></a>00430 index = octal.search(s.c_str(), s.length(), matchlen, 0);
<a name="l00431"></a>00431 <span class="keywordflow">while</span> (index < s.length()) {
<a name="l00432"></a>00432 s.replace(index, 4, <a class="code" href="namespacelibdap.html#afbc8888b9891cac063f4d77b368b1021">unoctstring</a>(s.substr(index + 1, 3)));
<a name="l00433"></a>00433 <a class="code" href="debug_8h.html#a32adf79142f0a426b5e782fb7cd4cad3">DBG</a>(cerr << <span class="stringliteral">"3XX"</span> << s << <span class="stringliteral">"XXX index: "</span> << index << endl);
<a name="l00434"></a>00434 index = octal.search(s.c_str(), s.length(), matchlen, 0);
<a name="l00435"></a>00435 }
<a name="l00436"></a>00436
<a name="l00437"></a>00437 <a class="code" href="debug_8h.html#a32adf79142f0a426b5e782fb7cd4cad3">DBG</a>(cerr << <span class="stringliteral">"4XX"</span> << s << <span class="stringliteral">"XXX"</span> << endl);
<a name="l00438"></a>00438 <span class="keywordflow">return</span> s;
<a name="l00439"></a>00439 }
<a name="l00440"></a>00440
<a name="l00441"></a>00441 <span class="keywordtype">string</span>
<a name="l00442"></a><a class="code" href="namespacelibdap.html#a959e3920299235f2615b8db7bc822b6d">00442</a> <a class="code" href="namespacelibdap.html#a959e3920299235f2615b8db7bc822b6d">munge_error_message</a>(<span class="keywordtype">string</span> msg)
<a name="l00443"></a>00443 {
<a name="l00444"></a>00444 <span class="comment">// First, add enclosing quotes if needed.</span>
<a name="l00445"></a>00445 <span class="keywordflow">if</span> (*msg.begin() != <span class="charliteral">'"'</span>)
<a name="l00446"></a>00446 msg.insert(msg.begin(), <span class="charliteral">'"'</span>);
<a name="l00447"></a>00447 <span class="keywordflow">if</span> (*(msg.end() - 1) != <span class="charliteral">'"'</span>)
<a name="l00448"></a>00448 msg += <span class="stringliteral">"\""</span>;
<a name="l00449"></a>00449
<a name="l00450"></a>00450 <span class="comment">// Now escape any internal double quotes that aren't escaped.</span>
<a name="l00451"></a>00451 string::iterator miter;
<a name="l00452"></a>00452 <span class="keywordflow">for</span> (miter = msg.begin() + 1; miter != msg.end() - 1; miter++)
<a name="l00453"></a>00453 <span class="keywordflow">if</span> (*miter == <span class="charliteral">'"'</span> && *(miter - 1) != <span class="charliteral">'\\'</span>)
<a name="l00454"></a>00454 miter = msg.insert(miter, <span class="charliteral">'\\'</span>);
<a name="l00455"></a>00455
<a name="l00456"></a>00456 <span class="keywordflow">return</span> msg;
<a name="l00457"></a>00457 }
<a name="l00458"></a>00458
<a name="l00463"></a>00463 <span class="keywordtype">string</span>
<a name="l00464"></a><a class="code" href="namespacelibdap.html#aa26bd967ca156771d2bd79db8bd3a91f">00464</a> <a class="code" href="namespacelibdap.html#aa26bd967ca156771d2bd79db8bd3a91f">escape_double_quotes</a>(<span class="keywordtype">string</span> source)
<a name="l00465"></a>00465 {
<a name="l00466"></a>00466 string::size_type idx = 0;
<a name="l00467"></a>00467 <span class="keywordflow">while</span>((idx = source.find(<span class="charliteral">'\"'</span>, idx)) != string::npos) {
<a name="l00468"></a>00468 source.replace(idx, 1, <span class="stringliteral">"\\\""</span>); <span class="comment">// a backslash and a double quote</span>
<a name="l00469"></a>00469 idx += 2;
<a name="l00470"></a>00470 }
<a name="l00471"></a>00471
<a name="l00472"></a>00472 <span class="keywordflow">return</span> source;
<a name="l00473"></a>00473 }
<a name="l00474"></a>00474
<a name="l00480"></a>00480 <span class="keywordtype">string</span>
<a name="l00481"></a><a class="code" href="namespacelibdap.html#a4c3ce7a705067cd34a90d2481033fdb6">00481</a> <a class="code" href="namespacelibdap.html#a4c3ce7a705067cd34a90d2481033fdb6">unescape_double_quotes</a>(<span class="keywordtype">string</span> source)
<a name="l00482"></a>00482 {
<a name="l00483"></a>00483 string::size_type idx = 0;
<a name="l00484"></a>00484 <span class="keywordflow">while</span>((idx = source.find(<span class="stringliteral">"\\\""</span>, idx)) != string::npos) {
<a name="l00485"></a>00485 source.replace(idx, 2, <span class="stringliteral">"\""</span>); <span class="comment">// a backslash and a double quote</span>
<a name="l00486"></a>00486 ++idx;
<a name="l00487"></a>00487 }
<a name="l00488"></a>00488
<a name="l00489"></a>00489 <span class="keywordflow">return</span> source;
<a name="l00490"></a>00490 }
<a name="l00491"></a>00491
<a name="l00492"></a>00492 } <span class="comment">// namespace libdap</span>
<a name="l00493"></a>00493
</pre></div></div>
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<li class="navelem"><a class="el" href="escaping_8cc.html">escaping.cc</a> </li>
<li class="footer">Generated on Tue Feb 8 2011 for libdap++ by 
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.3 </li>
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