167 lines
5.5 KiB
C
167 lines
5.5 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) 2016-2019 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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* Create a match data block given ovector size *
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*************************************************/
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/* A minimum of 1 is imposed on the number of ovector pairs. */
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PCRE2_EXP_DEFN pcre2_match_data * PCRE2_CALL_CONVENTION
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pcre2_match_data_create(uint32_t oveccount, pcre2_general_context *gcontext)
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{
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pcre2_match_data *yield;
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if (oveccount < 1) oveccount = 1;
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yield = PRIV(memctl_malloc)(
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offsetof(pcre2_match_data, ovector) + 2*oveccount*sizeof(PCRE2_SIZE),
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(pcre2_memctl *)gcontext);
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if (yield == NULL) return NULL;
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yield->oveccount = oveccount;
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yield->flags = 0;
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return yield;
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}
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/*************************************************
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* Create a match data block using pattern data *
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*************************************************/
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/* If no context is supplied, use the memory allocator from the code. */
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PCRE2_EXP_DEFN pcre2_match_data * PCRE2_CALL_CONVENTION
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pcre2_match_data_create_from_pattern(const pcre2_code *code,
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pcre2_general_context *gcontext)
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{
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if (gcontext == NULL) gcontext = (pcre2_general_context *)code;
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return pcre2_match_data_create(((pcre2_real_code *)code)->top_bracket + 1,
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gcontext);
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}
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/*************************************************
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* Free a match data block *
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*************************************************/
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PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
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pcre2_match_data_free(pcre2_match_data *match_data)
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{
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if (match_data != NULL)
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{
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if ((match_data->flags & PCRE2_MD_COPIED_SUBJECT) != 0)
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match_data->memctl.free((void *)match_data->subject,
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match_data->memctl.memory_data);
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match_data->memctl.free(match_data, match_data->memctl.memory_data);
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}
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}
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/*************************************************
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* Get last mark in match *
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*************************************************/
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PCRE2_EXP_DEFN PCRE2_SPTR PCRE2_CALL_CONVENTION
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pcre2_get_mark(pcre2_match_data *match_data)
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{
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return match_data->mark;
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}
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/*************************************************
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* Get pointer to ovector *
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*************************************************/
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PCRE2_EXP_DEFN PCRE2_SIZE * PCRE2_CALL_CONVENTION
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pcre2_get_ovector_pointer(pcre2_match_data *match_data)
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{
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return match_data->ovector;
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}
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/*************************************************
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* Get number of ovector slots *
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*************************************************/
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PCRE2_EXP_DEFN uint32_t PCRE2_CALL_CONVENTION
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pcre2_get_ovector_count(pcre2_match_data *match_data)
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{
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return match_data->oveccount;
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}
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/*************************************************
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* Get starting code unit in match *
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*************************************************/
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PCRE2_EXP_DEFN PCRE2_SIZE PCRE2_CALL_CONVENTION
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pcre2_get_startchar(pcre2_match_data *match_data)
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{
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return match_data->startchar;
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}
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/*************************************************
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* Get size of match data block *
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*************************************************/
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PCRE2_EXP_DEFN PCRE2_SIZE PCRE2_CALL_CONVENTION
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pcre2_get_match_data_size(pcre2_match_data *match_data)
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{
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return offsetof(pcre2_match_data, ovector) +
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2 * (match_data->oveccount) * sizeof(PCRE2_SIZE);
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}
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/* End of pcre2_match_data.c */
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