148 lines
5.1 KiB
C
148 lines
5.1 KiB
C
/*************************************************
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* Perl-Compatible Regular Expressions *
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*************************************************/
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/* PCRE is a library of functions to support regular expressions whose syntax
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and semantics are as close as possible to those of the Perl 5 language.
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Written by Philip Hazel
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Original API code Copyright (c) 1997-2012 University of Cambridge
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New API code Copyright (c) 2014 University of Cambridge
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-----------------------------------------------------------------------------
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the University of Cambridge nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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-----------------------------------------------------------------------------
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "pcre2_internal.h"
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/*************************************************
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* Match a Regular Expression *
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*************************************************/
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/* This function applies a compiled re to a subject string and picks out
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portions of the string if it matches. Two elements in the vector are set for
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each substring: the offsets to the start and end of the substring.
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Arguments:
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context points a PCRE2 context
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code points to the compiled expression
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subject points to the subject string
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length length of subject string (may contain binary zeros)
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start_offset where to start in the subject string
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options option bits
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match_data points to a match_data block
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Returns: > 0 => success; value is the number of ovector pairs filled
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= 0 => success, but ovector is not big enough
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-1 => failed to match (PCRE_ERROR_NOMATCH)
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< -1 => some kind of unexpected problem
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*/
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/* FIXME: this is currently a placeholder function */
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PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
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pcre2_match(const pcre2_code *code, PCRE2_SPTR subject, int length,
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size_t start_offset, uint32_t options, pcre2_match_data *match_data,
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pcre2_match_context *mcontext)
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{
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int rc = PCRE2_ERROR_NOMATCH;
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mcontext=mcontext;length=length;
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options=options;
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/* Fudges for testing pcre2test */
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if (subject[0] == 'Y')
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{
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rc = 0;
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match_data->code = code;
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match_data->subject = subject;
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match_data->leftchar = 0;
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match_data->rightchar = 3;
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match_data->startchar = 0;
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match_data->mark = NULL;
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switch (match_data->oveccount)
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{
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case 0: break;
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case 1: match_data->ovector[0] = start_offset;
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match_data->ovector[1] = start_offset + 4;
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break;
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default:
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case 6: match_data->ovector[10] = PCRE2_UNSET;
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match_data->ovector[11] = PCRE2_UNSET;
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case 5: match_data->ovector[8] = PCRE2_UNSET;
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match_data->ovector[9] = PCRE2_UNSET;
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case 4: match_data->ovector[6] = start_offset + 3;
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match_data->ovector[7] = start_offset + 4;
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rc += 2;
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case 3: match_data->ovector[4] = PCRE2_UNSET;
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match_data->ovector[5] = PCRE2_UNSET;
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case 2: match_data->ovector[0] = start_offset;
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match_data->ovector[1] = start_offset + 4;
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match_data->ovector[2] = start_offset + 1;
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match_data->ovector[3] = start_offset + 3;
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match_data->mark = subject;
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rc += 2;
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break;
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}
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}
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else if (subject[0] == 'P')
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{
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rc = PCRE2_ERROR_PARTIAL;
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match_data->code = code;
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match_data->subject = subject;
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match_data->leftchar = 0;
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match_data->rightchar = length;
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match_data->startchar = 1;
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match_data->mark = NULL;
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}
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else if (subject[0] == 'E') rc = PCRE2_ERROR_MATCHLIMIT;
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match_data->rc = rc;
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return rc;
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}
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/* End of pcre2_match.c */
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