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<div class="title">regexp.cpp</div> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// -*- c-basic-offset: 2 -*-</span>
<a name="l00002"></a>00002 <span class="comment">/*</span>
<a name="l00003"></a>00003 <span class="comment"> * This file is part of the KDE libraries</span>
<a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 1999-2001 Harri Porten (porten@kde.org)</span>
<a name="l00005"></a>00005 <span class="comment"> * Copyright (C) 2003,2004 Apple Computer, Inc.</span>
<a name="l00006"></a>00006 <span class="comment"> * Copyright (C) 2006 Maksim Orlovich (maksim@kde.org)</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
<a name="l00009"></a>00009 <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span>
<a name="l00010"></a>00010 <span class="comment"> * License as published by the Free Software Foundation; either</span>
<a name="l00011"></a>00011 <span class="comment"> * version 2 of the License, or (at your option) any later version.</span>
<a name="l00012"></a>00012 <span class="comment"> *</span>
<a name="l00013"></a>00013 <span class="comment"> * This library is distributed in the hope that it will be useful,</span>
<a name="l00014"></a>00014 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00015"></a>00015 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00016"></a>00016 <span class="comment"> * Lesser General Public License for more details.</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span>
<a name="l00019"></a>00019 <span class="comment"> * License along with this library; if not, write to the Free Software</span>
<a name="l00020"></a>00020 <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span>
<a name="l00021"></a>00021 <span class="comment"> *</span>
<a name="l00022"></a>00022 <span class="comment"> */</span>
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="preprocessor">#include "regexp.h"</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="preprocessor">#include "lexer.h"</span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <assert.h></span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <stdio.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <string.h></span>
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="keyword">using namespace </span>KJS;
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="preprocessor">#ifdef PCRE_CONFIG_UTF8</span>
<a name="l00035"></a>00035 <span class="preprocessor"></span>RegExp::UTF8SupportState RegExp::utf8Support = RegExp::Unknown;
<a name="l00036"></a>00036 <span class="preprocessor">#endif</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span>
<a name="l00038"></a>00038 RegExp::RegExp(<span class="keyword">const</span> <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> &p, <span class="keywordtype">int</span> f)
<a name="l00039"></a>00039 : pat(p), flgs(f), m_notEmpty(false), valid(true), buffer(0), originalPos(0)
<a name="l00040"></a>00040 {
<a name="l00041"></a>00041 <span class="comment">// Determine whether libpcre has unicode support if need be..</span>
<a name="l00042"></a>00042 <span class="preprocessor">#ifdef PCRE_CONFIG_UTF8</span>
<a name="l00043"></a>00043 <span class="preprocessor"></span> <span class="keywordflow">if</span> (utf8Support == Unknown) {
<a name="l00044"></a>00044 <span class="keywordtype">int</span> supported;
<a name="l00045"></a>00045 pcre_config(PCRE_CONFIG_UTF8, (<span class="keywordtype">void</span>*)&supported);
<a name="l00046"></a>00046 utf8Support = supported ? Supported : Unsupported;
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048 <span class="preprocessor">#endif</span>
<a name="l00049"></a>00049 <span class="preprocessor"></span>
<a name="l00050"></a>00050 nrSubPatterns = 0; <span class="comment">// determined in match() with POSIX regex.</span>
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="comment">// JS regexps can contain Unicode escape sequences (\uxxxx) which</span>
<a name="l00053"></a>00053 <span class="comment">// are rather uncommon elsewhere. As our regexp libs don't understand</span>
<a name="l00054"></a>00054 <span class="comment">// them we do the unescaping ourselves internally.</span>
<a name="l00055"></a>00055 <span class="comment">// Also make sure to expand out any nulls as pcre_compile </span>
<a name="l00056"></a>00056 <span class="comment">// expects null termination..</span>
<a name="l00057"></a>00057 <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> intern;
<a name="l00058"></a>00058 <span class="keyword">const</span> <span class="keywordtype">char</span>* <span class="keyword">const</span> nil = <span class="stringliteral">"\\x00"</span>;
<a name="l00059"></a>00059 <span class="keywordflow">if</span> (p.<a class="code" href="classKJS_1_1UString.html#a8a7e8222f9166800c8250cb02b0d717a">find</a>(<span class="charliteral">'\\'</span>) >= 0 || p.<a class="code" href="classKJS_1_1UString.html#a8a7e8222f9166800c8250cb02b0d717a">find</a>(<a class="code" href="structKJS_1_1UChar.html" title="Unicode character.">KJS::UChar</a>(<span class="charliteral">'\0'</span>)) >= 0) {
<a name="l00060"></a>00060 <span class="keywordtype">bool</span> escape = <span class="keyword">false</span>;
<a name="l00061"></a>00061 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < p.<a class="code" href="classKJS_1_1UString.html#a43b493879fd9d2d8e13039d1610cb3b9">size</a>(); ++i) {
<a name="l00062"></a>00062 <a class="code" href="structKJS_1_1UChar.html" title="Unicode character.">UChar</a> c = p[i];
<a name="l00063"></a>00063 <span class="keywordflow">if</span> (escape) {
<a name="l00064"></a>00064 escape = <span class="keyword">false</span>;
<a name="l00065"></a>00065 <span class="comment">// we only care about \u</span>
<a name="l00066"></a>00066 <span class="keywordflow">if</span> (c == <span class="charliteral">'u'</span>) {
<a name="l00067"></a>00067 <span class="comment">// standard unicode escape sequence looks like \uxxxx but</span>
<a name="l00068"></a>00068 <span class="comment">// other browsers also accept less then 4 hex digits</span>
<a name="l00069"></a>00069 <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> u = 0;
<a name="l00070"></a>00070 <span class="keywordtype">int</span> j = 0;
<a name="l00071"></a>00071 <span class="keywordflow">for</span> (j = 0; j < 4; ++j) {
<a name="l00072"></a>00072 <span class="keywordflow">if</span> (i + 1 < p.<a class="code" href="classKJS_1_1UString.html#a43b493879fd9d2d8e13039d1610cb3b9">size</a>() && Lexer::isHexDigit(p[i + 1].unicode())) {
<a name="l00073"></a>00073 u = (u << 4) + Lexer::convertHex(p[i + 1].unicode());
<a name="l00074"></a>00074 ++i;
<a name="l00075"></a>00075 } <span class="keywordflow">else</span> {
<a name="l00076"></a>00076 <span class="comment">// sequence incomplete. restore index.</span>
<a name="l00077"></a>00077 <span class="comment">// TODO: cleaner way to propagate warning</span>
<a name="l00078"></a>00078 fprintf(stderr, <span class="stringliteral">"KJS: saw %d digit \\u sequence.\n"</span>, j);
<a name="l00079"></a>00079 i -= j;
<a name="l00080"></a>00080 <span class="keywordflow">break</span>;
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083 <span class="keywordflow">if</span> (j < 4) {
<a name="l00084"></a>00084 <span class="comment">// sequence was incomplete. treat \u as u which IE always</span>
<a name="l00085"></a>00085 <span class="comment">// and FF sometimes does.</span>
<a name="l00086"></a>00086 intern.<a class="code" href="classKJS_1_1UString.html#af20edaa32eba4f5c3a148098e843742d" title="Append another string.">append</a>(<a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(<span class="charliteral">'u'</span>));
<a name="l00087"></a>00087 } <span class="keywordflow">else</span> {
<a name="l00088"></a>00088 c = <a class="code" href="structKJS_1_1UChar.html" title="Unicode character.">UChar</a>(u);
<a name="l00089"></a>00089 <span class="keywordflow">switch</span> (u) {
<a name="l00090"></a>00090 <span class="keywordflow">case</span> 0:
<a name="l00091"></a>00091 <span class="comment">// Make sure to encode 0, to avoid terminating the string</span>
<a name="l00092"></a>00092 intern += <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(nil);
<a name="l00093"></a>00093 <span class="keywordflow">break</span>;
<a name="l00094"></a>00094 <span class="keywordflow">case</span> <span class="charliteral">'^'</span>:
<a name="l00095"></a>00095 <span class="keywordflow">case</span> <span class="charliteral">'$'</span>:
<a name="l00096"></a>00096 <span class="keywordflow">case</span> <span class="charliteral">'\\'</span>:
<a name="l00097"></a>00097 <span class="keywordflow">case</span> <span class="charliteral">'.'</span>:
<a name="l00098"></a>00098 <span class="keywordflow">case</span> <span class="charliteral">'*'</span>:
<a name="l00099"></a>00099 <span class="keywordflow">case</span> <span class="charliteral">'+'</span>:
<a name="l00100"></a>00100 <span class="keywordflow">case</span> <span class="charliteral">'?'</span>:
<a name="l00101"></a>00101 <span class="keywordflow">case</span> <span class="charliteral">'('</span>: <span class="keywordflow">case</span> <span class="charliteral">')'</span>:
<a name="l00102"></a>00102 <span class="keywordflow">case</span> <span class="charliteral">'{'</span>: <span class="keywordflow">case</span> <span class="charliteral">'}'</span>:
<a name="l00103"></a>00103 <span class="keywordflow">case</span> <span class="charliteral">'['</span>: <span class="keywordflow">case</span> <span class="charliteral">']'</span>:
<a name="l00104"></a>00104 <span class="keywordflow">case</span> <span class="charliteral">'|'</span>:
<a name="l00105"></a>00105 <span class="comment">// escape pattern characters have to remain escaped</span>
<a name="l00106"></a>00106 intern.<a class="code" href="classKJS_1_1UString.html#af20edaa32eba4f5c3a148098e843742d" title="Append another string.">append</a>(<a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(<span class="charliteral">'\\'</span>));
<a name="l00107"></a>00107 <span class="comment">// intentional fallthrough</span>
<a name="l00108"></a>00108 <span class="keywordflow">default</span>:
<a name="l00109"></a>00109 intern += <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(&c, 1);
<a name="l00110"></a>00110 <span class="keywordflow">break</span>;
<a name="l00111"></a>00111 }
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113 <span class="keywordflow">continue</span>;
<a name="l00114"></a>00114 }
<a name="l00115"></a>00115 intern += <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(<span class="charliteral">'\\'</span>);
<a name="l00116"></a>00116 intern += <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(&c, 1);
<a name="l00117"></a>00117 } <span class="keywordflow">else</span> {
<a name="l00118"></a>00118 <span class="keywordflow">if</span> (c == <span class="charliteral">'\\'</span>)
<a name="l00119"></a>00119 escape = <span class="keyword">true</span>;
<a name="l00120"></a>00120 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (c == <span class="charliteral">'\0'</span>)
<a name="l00121"></a>00121 intern += <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(nil);
<a name="l00122"></a>00122 <span class="keywordflow">else</span>
<a name="l00123"></a>00123 intern += <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(&c, 1);
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126 } <span class="keywordflow">else</span> {
<a name="l00127"></a>00127 intern = p;
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129
<a name="l00130"></a>00130 <span class="preprocessor">#ifdef HAVE_PCREPOSIX</span>
<a name="l00131"></a>00131 <span class="preprocessor"></span> <span class="keywordtype">int</span> pcreflags = 0;
<a name="l00132"></a>00132 <span class="keyword">const</span> <span class="keywordtype">char</span> *perrormsg;
<a name="l00133"></a>00133 <span class="keywordtype">int</span> errorOffset;
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="keywordflow">if</span> (flgs & IgnoreCase)
<a name="l00136"></a>00136 pcreflags |= PCRE_CASELESS;
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="keywordflow">if</span> (flgs & Multiline)
<a name="l00139"></a>00139 pcreflags |= PCRE_MULTILINE;
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <span class="preprocessor">#ifdef PCRE_CONFIG_UTF8</span>
<a name="l00142"></a>00142 <span class="preprocessor"></span> <span class="keywordflow">if</span> (utf8Support == Supported)
<a name="l00143"></a>00143 pcreflags |= (PCRE_UTF8 | PCRE_NO_UTF8_CHECK);
<a name="l00144"></a>00144 <span class="preprocessor">#endif</span>
<a name="l00145"></a>00145 <span class="preprocessor"></span>
<a name="l00146"></a>00146 <span class="comment">// Fill our buffer with an encoded version, whether utf-8, or, </span>
<a name="l00147"></a>00147 <span class="comment">// if PCRE is incapable, truncated.</span>
<a name="l00148"></a>00148 prepareMatch(intern);
<a name="l00149"></a>00149
<a name="l00150"></a>00150 pcregex = pcre_compile(buffer, pcreflags,
<a name="l00151"></a>00151 &perrormsg, &errorOffset, NULL);
<a name="l00152"></a>00152 doneMatch(); <span class="comment">// Cleanup buffers</span>
<a name="l00153"></a>00153 <span class="keywordflow">if</span> (!pcregex) {
<a name="l00154"></a>00154 <span class="preprocessor">#ifndef NDEBUG</span>
<a name="l00155"></a>00155 <span class="preprocessor"></span> fprintf(stderr, <span class="stringliteral">"KJS: pcre_compile() failed with '%s'\n"</span>, perrormsg);
<a name="l00156"></a>00156 <span class="preprocessor">#endif</span>
<a name="l00157"></a>00157 <span class="preprocessor"></span> valid = <span class="keyword">false</span>;
<a name="l00158"></a>00158 <span class="keywordflow">return</span>;
<a name="l00159"></a>00159 }
<a name="l00160"></a>00160
<a name="l00161"></a>00161 <span class="preprocessor">#ifdef PCRE_INFO_CAPTURECOUNT</span>
<a name="l00162"></a>00162 <span class="preprocessor"></span> <span class="comment">// Get number of subpatterns that will be returned</span>
<a name="l00163"></a>00163 <span class="keywordtype">int</span> rc = pcre_fullinfo( pcregex, NULL, PCRE_INFO_CAPTURECOUNT, &nrSubPatterns);
<a name="l00164"></a>00164 <span class="keywordflow">if</span> (rc != 0)
<a name="l00165"></a>00165 <span class="preprocessor">#endif</span>
<a name="l00166"></a>00166 <span class="preprocessor"></span> nrSubPatterns = 0; <span class="comment">// fallback. We always need the first pair of offsets.</span>
<a name="l00167"></a>00167
<a name="l00168"></a>00168 <span class="preprocessor">#else </span><span class="comment">/* HAVE_PCREPOSIX */</span>
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <span class="keywordtype">int</span> regflags = 0;
<a name="l00171"></a>00171 <span class="preprocessor">#ifdef REG_EXTENDED</span>
<a name="l00172"></a>00172 <span class="preprocessor"></span> regflags |= REG_EXTENDED;
<a name="l00173"></a>00173 <span class="preprocessor">#endif</span>
<a name="l00174"></a>00174 <span class="preprocessor"></span><span class="preprocessor">#ifdef REG_ICASE</span>
<a name="l00175"></a>00175 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( f & IgnoreCase )
<a name="l00176"></a>00176 regflags |= REG_ICASE;
<a name="l00177"></a>00177 <span class="preprocessor">#endif</span>
<a name="l00178"></a>00178 <span class="preprocessor"></span>
<a name="l00179"></a>00179 <span class="comment">//NOTE: Multiline is not feasible with POSIX regex.</span>
<a name="l00180"></a>00180 <span class="comment">//if ( f & Multiline )</span>
<a name="l00181"></a>00181 <span class="comment">// ;</span>
<a name="l00182"></a>00182 <span class="comment">// Note: the Global flag is already handled by RegExpProtoFunc::execute</span>
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <span class="keywordtype">int</span> errorCode = regcomp(&preg, intern.<a class="code" href="classKJS_1_1UString.html#a2ac3d2b62d65d075f2d99bf7ed2ec366" title="Convert the Unicode string to plain ASCII chars chopping of any higher bytes.">ascii</a>(), regflags);
<a name="l00185"></a>00185 <span class="keywordflow">if</span> (errorCode != 0) {
<a name="l00186"></a>00186 <span class="preprocessor">#ifndef NDEBUG</span>
<a name="l00187"></a>00187 <span class="preprocessor"></span> <span class="keywordtype">char</span> errorMessage[80];
<a name="l00188"></a>00188 regerror(errorCode, &preg, errorMessage, <span class="keyword">sizeof</span> errorMessage);
<a name="l00189"></a>00189 fprintf(stderr, <span class="stringliteral">"KJS: regcomp failed with '%s'\n"</span>, errorMessage);
<a name="l00190"></a>00190 <span class="preprocessor">#endif</span>
<a name="l00191"></a>00191 <span class="preprocessor"></span> valid = <span class="keyword">false</span>;
<a name="l00192"></a>00192 }
<a name="l00193"></a>00193 <span class="preprocessor">#endif</span>
<a name="l00194"></a>00194 <span class="preprocessor"></span>}
<a name="l00195"></a>00195
<a name="l00196"></a>00196 RegExp::~RegExp()
<a name="l00197"></a>00197 {
<a name="l00198"></a>00198 doneMatch(); <span class="comment">// Be 100% sure buffers are freed</span>
<a name="l00199"></a>00199 <span class="preprocessor">#ifdef HAVE_PCREPOSIX</span>
<a name="l00200"></a>00200 <span class="preprocessor"></span> <span class="keywordflow">if</span> (pcregex)
<a name="l00201"></a>00201 pcre_free(pcregex);
<a name="l00202"></a>00202 <span class="preprocessor">#else</span>
<a name="l00203"></a>00203 <span class="preprocessor"></span> <span class="comment">/* TODO: is this really okay after an error ? */</span>
<a name="l00204"></a>00204 regfree(&preg);
<a name="l00205"></a>00205 <span class="preprocessor">#endif</span>
<a name="l00206"></a>00206 <span class="preprocessor"></span>}
<a name="l00207"></a>00207
<a name="l00208"></a>00208 <span class="keywordtype">void</span> RegExp::prepareUtf8(<span class="keyword">const</span> <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>& s)
<a name="l00209"></a>00209 {
<a name="l00210"></a>00210 <span class="comment">// Allocate a buffer big enough to hold all the characters plus \0</span>
<a name="l00211"></a>00211 <span class="keyword">const</span> <span class="keywordtype">int</span> length = s.<a class="code" href="classKJS_1_1UString.html#a43b493879fd9d2d8e13039d1610cb3b9">size</a>();
<a name="l00212"></a>00212 buffer = <span class="keyword">new</span> <span class="keywordtype">char</span>[length * 3 + 1];
<a name="l00213"></a>00213
<a name="l00214"></a>00214 <span class="comment">// Also create buffer for positions. We need one extra character in there,</span>
<a name="l00215"></a>00215 <span class="comment">// even past the \0 since the non-empty handling may jump one past the end</span>
<a name="l00216"></a>00216 originalPos = <span class="keyword">new</span> <span class="keywordtype">int</span>[length * 3 + 2];
<a name="l00217"></a>00217
<a name="l00218"></a>00218 <span class="comment">// Convert to runs of 8-bit characters, and generate indeces</span>
<a name="l00219"></a>00219 <span class="comment">// Note that we do NOT combine surrogate pairs here, as </span>
<a name="l00220"></a>00220 <span class="comment">// regexps operate on them as separate characters</span>
<a name="l00221"></a>00221 <span class="keywordtype">char</span> *p = buffer;
<a name="l00222"></a>00222 <span class="keywordtype">int</span> *posOut = originalPos;
<a name="l00223"></a>00223 <span class="keyword">const</span> <a class="code" href="structKJS_1_1UChar.html" title="Unicode character.">UChar</a> *d = s.<a class="code" href="classKJS_1_1UString.html#a7dd595aa3385b55938014b32a0e88d0e">data</a>();
<a name="l00224"></a>00224 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i != length; ++i) {
<a name="l00225"></a>00225 <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> c = d[i].<a class="code" href="structKJS_1_1UChar.html#a27abfa37a66ab6e4dfc2bf59d66bacef">unicode</a>();
<a name="l00226"></a>00226
<a name="l00227"></a>00227 <span class="keywordtype">int</span> sequenceLen;
<a name="l00228"></a>00228 <span class="keywordflow">if</span> (c < 0x80) {
<a name="l00229"></a>00229 *p++ = (char)c;
<a name="l00230"></a>00230 sequenceLen = 1;
<a name="l00231"></a>00231 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (c < 0x800) {
<a name="l00232"></a>00232 *p++ = (char)((c >> 6) | 0xC0); <span class="comment">// C0 is the 2-byte flag for UTF-8</span>
<a name="l00233"></a>00233 *p++ = (char)((c | 0x80) & 0xBF); <span class="comment">// next 6 bits, with high bit set</span>
<a name="l00234"></a>00234 sequenceLen = 2;
<a name="l00235"></a>00235 } <span class="keywordflow">else</span> {
<a name="l00236"></a>00236 *p++ = (char)((c >> 12) | 0xE0); <span class="comment">// E0 is the 3-byte flag for UTF-8</span>
<a name="l00237"></a>00237 *p++ = (char)(((c >> 6) | 0x80) & 0xBF); <span class="comment">// next 6 bits, with high bit set</span>
<a name="l00238"></a>00238 *p++ = (char)((c | 0x80) & 0xBF); <span class="comment">// next 6 bits, with high bit set</span>
<a name="l00239"></a>00239 sequenceLen = 3;
<a name="l00240"></a>00240 }
<a name="l00241"></a>00241
<a name="l00242"></a>00242 <span class="keywordflow">while</span> (sequenceLen > 0) {
<a name="l00243"></a>00243 *posOut = i;
<a name="l00244"></a>00244 ++posOut;
<a name="l00245"></a>00245 --sequenceLen;
<a name="l00246"></a>00246 }
<a name="l00247"></a>00247 }
<a name="l00248"></a>00248
<a name="l00249"></a>00249 bufferSize = p - buffer;
<a name="l00250"></a>00250
<a name="l00251"></a>00251 *p++ = <span class="charliteral">'\0'</span>;
<a name="l00252"></a>00252
<a name="l00253"></a>00253 <span class="comment">// Record positions for \0, and the fictional character after that.</span>
<a name="l00254"></a>00254 *posOut = length;
<a name="l00255"></a>00255 *(posOut+1) = length+1;
<a name="l00256"></a>00256 }
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <span class="keywordtype">void</span> RegExp::prepareASCII (<span class="keyword">const</span> <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>& s)
<a name="l00259"></a>00259 {
<a name="l00260"></a>00260 originalPos = 0;
<a name="l00261"></a>00261
<a name="l00262"></a>00262 <span class="comment">// Best-effort attempt to get something done</span>
<a name="l00263"></a>00263 <span class="comment">// when we don't have utf 8 available -- use </span>
<a name="l00264"></a>00264 <span class="comment">// truncated version, and pray for the best </span>
<a name="l00265"></a>00265 <a class="code" href="classKJS_1_1CString.html" title="8 bit char based string class">CString</a> truncated = s.<a class="code" href="classKJS_1_1UString.html#a8698c19cee7a6ac284cedcc213a16149">cstring</a>();
<a name="l00266"></a>00266 buffer = <span class="keyword">new</span> <span class="keywordtype">char</span>[truncated.size() + 1];
<a name="l00267"></a>00267 memcpy(buffer, truncated.c_str(), truncated.size());
<a name="l00268"></a>00268 buffer[truncated.size()] = <span class="charliteral">'\0'</span>; <span class="comment">// For _compile use</span>
<a name="l00269"></a>00269 bufferSize = truncated.size();
<a name="l00270"></a>00270 }
<a name="l00271"></a>00271
<a name="l00272"></a>00272 <span class="keywordtype">void</span> RegExp::prepareMatch(<span class="keyword">const</span> <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> &s)
<a name="l00273"></a>00273 {
<a name="l00274"></a>00274 <span class="keyword">delete</span>[] originalPos; <span class="comment">// Just to be sure..</span>
<a name="l00275"></a>00275 <span class="keyword">delete</span>[] buffer;
<a name="l00276"></a>00276 <span class="preprocessor">#ifdef PCRE_CONFIG_UTF8</span>
<a name="l00277"></a>00277 <span class="preprocessor"></span> <span class="keywordflow">if</span> (utf8Support == Supported)
<a name="l00278"></a>00278 prepareUtf8(s);
<a name="l00279"></a>00279 <span class="keywordflow">else</span>
<a name="l00280"></a>00280 <span class="preprocessor">#endif</span>
<a name="l00281"></a>00281 <span class="preprocessor"></span> prepareASCII(s);
<a name="l00282"></a>00282
<a name="l00283"></a>00283 <span class="preprocessor">#ifndef NDEBUG</span>
<a name="l00284"></a>00284 <span class="preprocessor"></span> originalS = s;
<a name="l00285"></a>00285 <span class="preprocessor">#endif</span>
<a name="l00286"></a>00286 <span class="preprocessor"></span>}
<a name="l00287"></a>00287
<a name="l00288"></a>00288 <span class="keywordtype">void</span> RegExp::doneMatch()
<a name="l00289"></a>00289 {
<a name="l00290"></a>00290 <span class="keyword">delete</span>[] originalPos; originalPos = 0;
<a name="l00291"></a>00291 <span class="keyword">delete</span>[] buffer; buffer = 0;
<a name="l00292"></a>00292 }
<a name="l00293"></a>00293
<a name="l00294"></a>00294 <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> RegExp::match(<span class="keyword">const</span> <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> &s, <span class="keywordtype">int</span> i, <span class="keywordtype">int</span> *pos, <span class="keywordtype">int</span> **ovector)
<a name="l00295"></a>00295 {
<a name="l00296"></a>00296 <span class="preprocessor">#ifndef NDEBUG</span>
<a name="l00297"></a>00297 <span class="preprocessor"></span> assert(s.<a class="code" href="classKJS_1_1UString.html#a7dd595aa3385b55938014b32a0e88d0e">data</a>() == originalS.data()); <span class="comment">// Make sure prepareMatch got called right..</span>
<a name="l00298"></a>00298 <span class="preprocessor">#endif</span>
<a name="l00299"></a>00299 <span class="preprocessor"></span> assert(valid);
<a name="l00300"></a>00300
<a name="l00301"></a>00301 <span class="keywordflow">if</span> (i < 0)
<a name="l00302"></a>00302 i = 0;
<a name="l00303"></a>00303 <span class="keywordflow">if</span> (ovector)
<a name="l00304"></a>00304 *ovector = 0L;
<a name="l00305"></a>00305 <span class="keywordtype">int</span> dummyPos;
<a name="l00306"></a>00306 <span class="keywordflow">if</span> (!pos)
<a name="l00307"></a>00307 pos = &dummyPos;
<a name="l00308"></a>00308 *pos = -1;
<a name="l00309"></a>00309 <span class="keywordflow">if</span> (i > s.<a class="code" href="classKJS_1_1UString.html#a43b493879fd9d2d8e13039d1610cb3b9">size</a>() || s.<a class="code" href="classKJS_1_1UString.html#a13c9d3fb7c7f081736b28ee2d76471d4">isNull</a>())
<a name="l00310"></a>00310 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1UString.html#ab593c40f5576c145960dc5e9bbdb80ea" title="Static instance of a null string.">UString::null</a>;
<a name="l00311"></a>00311
<a name="l00312"></a>00312 <span class="preprocessor">#ifdef HAVE_PCREPOSIX</span>
<a name="l00313"></a>00313 <span class="preprocessor"></span> <span class="keywordtype">int</span> ovecsize = (nrSubPatterns+1)*3; <span class="comment">// see pcre docu</span>
<a name="l00314"></a>00314 <span class="keywordflow">if</span> (ovector) *ovector = <span class="keyword">new</span> <span class="keywordtype">int</span>[ovecsize];
<a name="l00315"></a>00315 <span class="keywordflow">if</span> (!pcregex)
<a name="l00316"></a>00316 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1UString.html#ab593c40f5576c145960dc5e9bbdb80ea" title="Static instance of a null string.">UString::null</a>;
<a name="l00317"></a>00317
<a name="l00318"></a>00318 <span class="keywordtype">int</span> startPos;
<a name="l00319"></a>00319 <span class="keywordtype">int</span> nextPos;
<a name="l00320"></a>00320
<a name="l00321"></a>00321 <span class="preprocessor">#ifdef PCRE_CONFIG_UTF8</span>
<a name="l00322"></a>00322 <span class="preprocessor"></span> <span class="keywordflow">if</span> (utf8Support == Supported) {
<a name="l00323"></a>00323 startPos = i;
<a name="l00324"></a>00324 <span class="keywordflow">while</span> (originalPos[startPos] < i)
<a name="l00325"></a>00325 ++startPos;
<a name="l00326"></a>00326
<a name="l00327"></a>00327 nextPos = startPos;
<a name="l00328"></a>00328 <span class="keywordflow">while</span> (originalPos[nextPos] < (i + 1))
<a name="l00329"></a>00329 ++nextPos;
<a name="l00330"></a>00330 } <span class="keywordflow">else</span>
<a name="l00331"></a>00331 <span class="preprocessor">#endif</span>
<a name="l00332"></a>00332 <span class="preprocessor"></span> {
<a name="l00333"></a>00333 startPos = i;
<a name="l00334"></a>00334 nextPos = i + 1;
<a name="l00335"></a>00335 }
<a name="l00336"></a>00336
<a name="l00337"></a>00337 <span class="keywordtype">int</span> baseFlags =
<a name="l00338"></a>00338 <span class="preprocessor">#ifdef PCRE_CONFIG_UTF8</span>
<a name="l00339"></a>00339 <span class="preprocessor"></span> utf8Support == Supported ? PCRE_NO_UTF8_CHECK :
<a name="l00340"></a>00340 <span class="preprocessor">#endif</span>
<a name="l00341"></a>00341 <span class="preprocessor"></span> 0;
<a name="l00342"></a>00342 <span class="keywordflow">if</span> (pcre_exec(pcregex, NULL, buffer, bufferSize, startPos,
<a name="l00343"></a>00343 m_notEmpty ? (PCRE_NOTEMPTY | PCRE_ANCHORED | baseFlags) : baseFlags, <span class="comment">// see man pcretest</span>
<a name="l00344"></a>00344 ovector ? *ovector : 0L, ovecsize) == PCRE_ERROR_NOMATCH)
<a name="l00345"></a>00345 {
<a name="l00346"></a>00346 <span class="comment">// Failed to match.</span>
<a name="l00347"></a>00347 <span class="keywordflow">if</span> ((flgs & Global) && m_notEmpty && ovector)
<a name="l00348"></a>00348 {
<a name="l00349"></a>00349 <span class="comment">// We set m_notEmpty ourselves, to look for a non-empty match</span>
<a name="l00350"></a>00350 <span class="comment">// (see man pcretest or pcretest.c for details).</span>
<a name="l00351"></a>00351 <span class="comment">// So we don't stop here, we want to try again at i+1.</span>
<a name="l00352"></a>00352 <span class="preprocessor">#ifdef KJS_VERBOSE</span>
<a name="l00353"></a>00353 <span class="preprocessor"></span> fprintf(stderr, <span class="stringliteral">"No match after m_notEmpty. +1 and keep going.\n"</span>);
<a name="l00354"></a>00354 <span class="preprocessor">#endif</span>
<a name="l00355"></a>00355 <span class="preprocessor"></span> m_notEmpty = 0;
<a name="l00356"></a>00356 <span class="keywordflow">if</span> (pcre_exec(pcregex, NULL, buffer, bufferSize, nextPos, baseFlags,
<a name="l00357"></a>00357 ovector ? *ovector : 0L, ovecsize) == PCRE_ERROR_NOMATCH)
<a name="l00358"></a>00358 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1UString.html#ab593c40f5576c145960dc5e9bbdb80ea" title="Static instance of a null string.">UString::null</a>;
<a name="l00359"></a>00359 }
<a name="l00360"></a>00360 <span class="keywordflow">else</span> <span class="comment">// done</span>
<a name="l00361"></a>00361 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1UString.html#ab593c40f5576c145960dc5e9bbdb80ea" title="Static instance of a null string.">UString::null</a>;
<a name="l00362"></a>00362 }
<a name="l00363"></a>00363
<a name="l00364"></a>00364 <span class="comment">// Got a match, proceed with it.</span>
<a name="l00365"></a>00365 <span class="comment">// But fix up the ovector if need be..</span>
<a name="l00366"></a>00366 <span class="keywordflow">if</span> (ovector && originalPos) {
<a name="l00367"></a>00367 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> c = 0; c < 2 * (nrSubPatterns + 1); ++c) {
<a name="l00368"></a>00368 <span class="keywordflow">if</span> ((*ovector)[c] != -1)
<a name="l00369"></a>00369 (*ovector)[c] = originalPos[(*ovector)[c]];
<a name="l00370"></a>00370 }
<a name="l00371"></a>00371 }
<a name="l00372"></a>00372
<a name="l00373"></a>00373 <span class="keywordflow">if</span> (!ovector)
<a name="l00374"></a>00374 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1UString.html#ab593c40f5576c145960dc5e9bbdb80ea" title="Static instance of a null string.">UString::null</a>; <span class="comment">// don't rely on the return value if you pass ovector==0</span>
<a name="l00375"></a>00375 <span class="preprocessor">#else</span>
<a name="l00376"></a>00376 <span class="preprocessor"></span> <span class="keyword">const</span> uint maxMatch = 10;
<a name="l00377"></a>00377 regmatch_t rmatch[maxMatch];
<a name="l00378"></a>00378
<a name="l00379"></a>00379 <span class="keywordtype">char</span> *str = strdup(s.<a class="code" href="classKJS_1_1UString.html#a2ac3d2b62d65d075f2d99bf7ed2ec366" title="Convert the Unicode string to plain ASCII chars chopping of any higher bytes.">ascii</a>()); <span class="comment">// TODO: why ???</span>
<a name="l00380"></a>00380 <span class="keywordflow">if</span> (regexec(&preg, str + i, maxMatch, rmatch, 0)) {
<a name="l00381"></a>00381 free(str);
<a name="l00382"></a>00382 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1UString.html#ab593c40f5576c145960dc5e9bbdb80ea" title="Static instance of a null string.">UString::null</a>;
<a name="l00383"></a>00383 }
<a name="l00384"></a>00384 free(str);
<a name="l00385"></a>00385
<a name="l00386"></a>00386 <span class="keywordflow">if</span> (!ovector) {
<a name="l00387"></a>00387 *pos = rmatch[0].rm_so + i;
<a name="l00388"></a>00388 <span class="keywordflow">return</span> s.<a class="code" href="classKJS_1_1UString.html#a9803bb317f9ad51ce189c2f688cf1941">substr</a>(rmatch[0].rm_so + i, rmatch[0].rm_eo - rmatch[0].rm_so);
<a name="l00389"></a>00389 }
<a name="l00390"></a>00390
<a name="l00391"></a>00391 <span class="comment">// map rmatch array to ovector used in PCRE case</span>
<a name="l00392"></a>00392 nrSubPatterns = 0;
<a name="l00393"></a>00393 <span class="keywordflow">for</span> (uint j = 0; j < maxMatch && rmatch[j].rm_so >= 0 ; j++) {
<a name="l00394"></a>00394 nrSubPatterns++;
<a name="l00395"></a>00395 <span class="comment">// if the nonEmpty flag is set, return a failed match if any of the</span>
<a name="l00396"></a>00396 <span class="comment">// subMatches happens to be an empty string.</span>
<a name="l00397"></a>00397 <span class="keywordflow">if</span> (m_notEmpty && rmatch[j].rm_so == rmatch[j].rm_eo)
<a name="l00398"></a>00398 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1UString.html#ab593c40f5576c145960dc5e9bbdb80ea" title="Static instance of a null string.">UString::null</a>;
<a name="l00399"></a>00399 }
<a name="l00400"></a>00400 <span class="comment">// Allow an ovector slot to return the (failed) match result.</span>
<a name="l00401"></a>00401 <span class="keywordflow">if</span> (nrSubPatterns == 0) nrSubPatterns = 1;
<a name="l00402"></a>00402
<a name="l00403"></a>00403 <span class="keywordtype">int</span> ovecsize = (nrSubPatterns)*3; <span class="comment">// see above</span>
<a name="l00404"></a>00404 *ovector = <span class="keyword">new</span> <span class="keywordtype">int</span>[ovecsize];
<a name="l00405"></a>00405 <span class="keywordflow">for</span> (uint j = 0; j < nrSubPatterns; j++) {
<a name="l00406"></a>00406 (*ovector)[2*j] = rmatch[j].rm_so + i;
<a name="l00407"></a>00407 (*ovector)[2*j+1] = rmatch[j].rm_eo + i;
<a name="l00408"></a>00408 }
<a name="l00409"></a>00409 <span class="preprocessor">#endif</span>
<a name="l00410"></a>00410 <span class="preprocessor"></span>
<a name="l00411"></a>00411 *pos = (*ovector)[0];
<a name="l00412"></a>00412 <span class="keywordflow">if</span> ( *pos == (*ovector)[1] && (flgs & Global) )
<a name="l00413"></a>00413 {
<a name="l00414"></a>00414 <span class="comment">// empty match, next try will be with m_notEmpty=true</span>
<a name="l00415"></a>00415 m_notEmpty=<span class="keyword">true</span>;
<a name="l00416"></a>00416 }
<a name="l00417"></a>00417 <span class="keywordflow">return</span> s.<a class="code" href="classKJS_1_1UString.html#a9803bb317f9ad51ce189c2f688cf1941">substr</a>((*ovector)[0], (*ovector)[1] - (*ovector)[0]);
<a name="l00418"></a>00418 }
<a name="l00419"></a>00419
<a name="l00420"></a>00420 <span class="preprocessor">#if 0 // unused</span>
<a name="l00421"></a>00421 <span class="preprocessor"></span><span class="keywordtype">bool</span> RegExp::test(<span class="keyword">const</span> <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> &s, <span class="keywordtype">int</span>)
<a name="l00422"></a>00422 {
<a name="l00423"></a>00423 <span class="preprocessor">#ifdef HAVE_PCREPOSIX</span>
<a name="l00424"></a>00424 <span class="preprocessor"></span> <span class="keywordtype">int</span> ovector[300];
<a name="l00425"></a>00425 <a class="code" href="classKJS_1_1CString.html" title="8 bit char based string class">CString</a> buffer(s.<a class="code" href="classKJS_1_1UString.html#a8698c19cee7a6ac284cedcc213a16149">cstring</a>());
<a name="l00426"></a>00426
<a name="l00427"></a>00427 <span class="keywordflow">if</span> (s.<a class="code" href="classKJS_1_1UString.html#a13c9d3fb7c7f081736b28ee2d76471d4">isNull</a>() ||
<a name="l00428"></a>00428 pcre_exec(pcregex, NULL, buffer.c_str(), buffer.size(), 0,
<a name="l00429"></a>00429 0, ovector, 300) == PCRE_ERROR_NOMATCH)
<a name="l00430"></a>00430 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00431"></a>00431 <span class="keywordflow">else</span>
<a name="l00432"></a>00432 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00433"></a>00433
<a name="l00434"></a>00434 <span class="preprocessor">#else</span>
<a name="l00435"></a>00435 <span class="preprocessor"></span>
<a name="l00436"></a>00436 <span class="keywordtype">char</span> *str = strdup(s.<a class="code" href="classKJS_1_1UString.html#a2ac3d2b62d65d075f2d99bf7ed2ec366" title="Convert the Unicode string to plain ASCII chars chopping of any higher bytes.">ascii</a>());
<a name="l00437"></a>00437 <span class="keywordtype">int</span> r = regexec(&preg, str, 0, 0, 0);
<a name="l00438"></a>00438 free(str);
<a name="l00439"></a>00439
<a name="l00440"></a>00440 <span class="keywordflow">return</span> r == 0;
<a name="l00441"></a>00441 <span class="preprocessor">#endif</span>
<a name="l00442"></a>00442 <span class="preprocessor"></span>}
<a name="l00443"></a>00443 <span class="preprocessor">#endif</span>
</pre></div></div>
</div>
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