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https://github.com/tursodatabase/libsql.git
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d3a156caf5
A common complain with libSQL is how to run extensions. The main mechanism, with a .so, has a lot of issues around how those .so are distributed. The most common extensions are the ones in the sqlean package. We can improve this experience by bundling them in our sqlite build. Not all SQLean extensions are kosher: some of them, like fileio, use the vfs. Others, are deemed too complex. The extensions included here are a subset that we deem important enough, and low risk enough, to just be a part of the main bundle.
186 lines
6.0 KiB
C
186 lines
6.0 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) 2016-2022 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 "regexp/pcre2/config.h"
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#endif
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#include "regexp/pcre2/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. A maximum is also
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imposed because the oveccount field in a match data block is uintt6_t. */
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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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if (oveccount > UINT16_MAX) oveccount = UINT16_MAX;
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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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yield->heapframes = NULL;
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yield->heapframes_size = 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->heapframes != NULL)
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match_data->memctl.free(match_data->heapframes,
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match_data->memctl.memory_data);
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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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/*************************************************
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* Get heapframes size *
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*************************************************/
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PCRE2_EXP_DEFN PCRE2_SIZE PCRE2_CALL_CONVENTION
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pcre2_get_match_data_heapframes_size(pcre2_match_data *match_data)
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{
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return match_data->heapframes_size;
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}
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/* End of pcre2_match_data.c */
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