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<hr><h1>search.cc</h1><a href="search_8cc.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <span class="comment">/*</span>
00002 <span class="comment"> *</span>
00003 <span class="comment"> * This file is part of the PCRE++ Class Library.</span>
00004 <span class="comment"> *</span>
00005 <span class="comment"> * By accessing this software, PCRE++, you are duly informed</span>
00006 <span class="comment"> * of and agree to be bound by the conditions described below</span>
00007 <span class="comment"> * in this notice:</span>
00008 <span class="comment"> *</span>
00009 <span class="comment"> * This software product, PCRE++, is developed by Thomas Linden</span>
00010 <span class="comment"> * and copyrighted (C) 2002-2003 by Thomas Linden,with all rights </span>
00011 <span class="comment"> * reserved.</span>
00012 <span class="comment"> *</span>
00013 <span class="comment"> * There is no charge for PCRE++ software. You can redistribute</span>
00014 <span class="comment"> * it and/or modify it under the terms of the GNU Lesser General</span>
00015 <span class="comment"> * Public License, which is incorporated by reference herein.</span>
00016 <span class="comment"> *</span>
00017 <span class="comment"> * PCRE++ is distributed WITHOUT ANY WARRANTY, IMPLIED OR EXPRESS,</span>
00018 <span class="comment"> * OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE or that</span>
00019 <span class="comment"> * the use of it will not infringe on any third party's intellec-</span>
00020 <span class="comment"> * tual property rights.</span>
00021 <span class="comment"> *</span>
00022 <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span>
00023 <span class="comment"> * License along with PCRE++. Copies can also be obtained from:</span>
00024 <span class="comment"> *</span>
00025 <span class="comment"> * http://www.gnu.org/licenses/lgpl.txt</span>
00026 <span class="comment"> *</span>
00027 <span class="comment"> * or by writing to:</span>
00028 <span class="comment"> *</span>
00029 <span class="comment"> * Free Software Foundation, Inc.</span>
00030 <span class="comment"> * 59 Temple Place, Suite 330</span>
00031 <span class="comment"> * Boston, MA 02111-1307</span>
00032 <span class="comment"> * USA</span>
00033 <span class="comment"> *</span>
00034 <span class="comment"> * Or contact:</span>
00035 <span class="comment"> *</span>
00036 <span class="comment"> * "Thomas Linden" <tom@daemon.de></span>
00037 <span class="comment"> *</span>
00038 <span class="comment"> *</span>
00039 <span class="comment"> */</span>
00040
00041
00042 <span class="preprocessor">#include "<a class="code" href="pcre++_8h.html">pcre++.h</a>"</span>
00043
00044 <span class="keyword">using</span> <span class="keyword">namespace </span>std;
00045 <span class="keyword">using</span> <span class="keyword">namespace </span>pcrepp;
00046
00047 <span class="comment">/*</span>
00048 <span class="comment"> * the search interface to pcre</span>
00049 <span class="comment"> */</span>
00050
00051
00052 <span class="comment">/*</span>
00053 <span class="comment"> * compile the expression</span>
00054 <span class="comment"> */</span>
00055 <span class="keywordtype">void</span> Pcre::Compile(<span class="keywordtype">int</span> flags) {
00056 p_pcre = pcre_compile((<span class="keywordtype">char</span> *)_expression.c_str(), flags,
00057 (<span class="keyword">const</span> <span class="keywordtype">char</span> **)(&err_str), &erroffset, tables);
00058
00059 <span class="keywordflow">if</span>(p_pcre == NULL) {
00060 <span class="comment">/* umh, that's odd, the parser should not fail at all */</span>
00061 string Error = err_str;
00062 <span class="keywordflow">throw</span> exception(<span class="stringliteral">"pcre_compile(..) failed: "</span> + Error + <span class="stringliteral">" at: "</span> + _expression.substr(erroffset));
00063 }
00064
00065 <span class="comment">/* calculate the number of substrings we are willing to catch */</span>
00066 <span class="keywordtype">int</span> where;
00067 <span class="keywordtype">int</span> info = pcre_fullinfo( p_pcre, p_pcre_extra, PCRE_INFO_CAPTURECOUNT, &where);
00068 <span class="keywordflow">if</span>(info == 0) {
00069 sub_len = (where +2) * 3; <span class="comment">/* see "man pcre" for the exact formula */</span>
00070 }
00071 <span class="keywordflow">else</span> {
00072 <span class="keywordflow">throw</span> exception(info);
00073 }
00074 reset();
00075 }
00076
00077
00078
00079
00080 <span class="comment">/*</span>
00081 <span class="comment"> * API methods</span>
00082 <span class="comment"> */</span>
<a name="l00083"></a><a class="code" href="classpcrepp_1_1Pcre.html#a9">00083</a> <span class="keywordtype">bool</span> Pcre::search(<span class="keyword">const</span> string& stuff, <span class="keywordtype">int</span> OffSet){
00084 <span class="keywordflow">return</span> dosearch(stuff, OffSet);
00085 }
00086
<a name="l00087"></a><a class="code" href="classpcrepp_1_1Pcre.html#a8">00087</a> <span class="keywordtype">bool</span> Pcre::search(<span class="keyword">const</span> string& stuff){
00088 <span class="keywordflow">return</span> dosearch(stuff, 0);
00089 }
00090
00091 <span class="keywordtype">bool</span> Pcre::dosearch(<span class="keyword">const</span> string& stuff, <span class="keywordtype">int</span> OffSet){
00092 reset();
00093 <span class="keywordflow">if</span> (sub_vec != NULL)
00094 <span class="keyword">delete</span>[] sub_vec;
00095
00096 sub_vec = <span class="keyword">new</span> <span class="keywordtype">int</span>[sub_len];
00097 <span class="keywordtype">int</span> num = pcre_exec(p_pcre, p_pcre_extra, (<span class="keywordtype">char</span> *)stuff.c_str(),
00098 (int)stuff.length(), OffSet, 0, (<span class="keywordtype">int</span> *)sub_vec, sub_len);
00099
00100 <a class="code" href="pcre++_8h.html#a0">__pcredebug</a> << <span class="stringliteral">"Pcre::dosearch(): pcre_exec() returned: "</span> << num << endl;
00101
00102 <span class="keywordflow">if</span>(num < 0) {
00103 <span class="comment">/* no match at all */</span>
00104 <a class="code" href="pcre++_8h.html#a0">__pcredebug</a> << <span class="stringliteral">" - no match"</span> << endl;
00105 <span class="keywordflow">return</span> <span class="keyword">false</span>;
00106 }
00107 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(num == 0) {
00108 <span class="comment">/* vector too small, there were too many substrings in stuff */</span>
00109 <a class="code" href="pcre++_8h.html#a0">__pcredebug</a> << <span class="stringliteral">" - too many substrings"</span> << endl;
00110 <span class="keywordflow">return</span> <span class="keyword">false</span>;
00111 }
00112 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(num == 1) {
00113 <span class="comment">/* we had a match, but without substrings */</span>
00114 <a class="code" href="pcre++_8h.html#a0">__pcredebug</a> << <span class="stringliteral">" - match without substrings"</span> << endl;
00115 did_match = <span class="keyword">true</span>;
00116 num_matches = 0;
00117 <span class="keywordflow">return</span> <span class="keyword">true</span>;
00118 }
00119 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(num > 1) {
00120 <span class="comment">/* we had matching substrings */</span>
00121 <span class="keywordflow">if</span> (resultset != NULL)
00122 <span class="keyword">delete</span> resultset;
00123 resultset = <span class="keyword">new</span> vector<string>;
00124 <span class="keyword">const</span> <span class="keywordtype">char</span> **stringlist;
00125 did_match = <span class="keyword">true</span>;
00126 num_matches = num - 1;
00127
00128 <a class="code" href="pcre++_8h.html#a0">__pcredebug</a> << <span class="stringliteral">" - match with "</span> << num_matches << <span class="stringliteral">" substrings"</span> << endl;
00129
00130 <span class="keywordtype">int</span> res = pcre_get_substring_list((<span class="keywordtype">char</span> *)stuff.c_str(), sub_vec, num, &stringlist);
00131 <span class="keywordflow">if</span>(res == 0) {
00132 <a class="code" href="pcre++_8h.html#a0">__pcredebug</a> << <span class="stringliteral">"Pcre::dosearch(): matched substrings: "</span> << endl;
00133 <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=1; i<num; i++) {
00134 <a class="code" href="pcre++_8h.html#a0">__pcredebug</a> << <span class="stringliteral">" "</span> << string(stringlist[i]) << endl;
00135 resultset->push_back(stringlist[i]);
00136 }
00137 pcre_free_substring_list(stringlist);
00138 }
00139 <span class="keywordflow">else</span> {
00140 <span class="keywordflow">throw</span> exception(res);
00141 }
00142 <span class="keywordflow">return</span> <span class="keyword">true</span>;
00143 }
00144 <span class="keywordflow">else</span> {
00145 <span class="comment">/* some other uncommon error occured */</span>
00146 <a class="code" href="pcre++_8h.html#a0">__pcredebug</a> << <span class="stringliteral">" - uncommon error"</span> << endl;
00147 <span class="keywordflow">return</span> <span class="keyword">false</span>;
00148 }
00149 }
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