/*************************************************

*      Perl-Compatible Regular Expressions       *

*************************************************/

/* PCRE is a library of functions to support regular expressions whose syntax

and semantics are as close as possible to those of the Perl 5 language.

                       Written by Philip Hazel

     Original API code Copyright (c) 1997-2012 University of Cambridge

          New API code Copyright (c) 2016-2024 University of Cambridge

-----------------------------------------------------------------------------

Redistribution and use in source and binary forms, with or without

modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,

      this list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright

      notice, this list of conditions and the following disclaimer in the

      documentation and/or other materials provided with the distribution.

    * Neither the name of the University of Cambridge nor the names of its

      contributors may be used to endorse or promote products derived from

      this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

POSSIBILITY OF SUCH DAMAGE.

-----------------------------------------------------------------------------

*/

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include "pcre2_internal.h"

/*************************************************

*  Create a match data block given ovector size  *

*************************************************/

/* A minimum of 1 is imposed on the number of ovector pairs. A maximum is also

imposed because the oveccount field in a match data block is uintt6_t. */

PCRE2_EXP_DEFN pcre2_match_data * PCRE2_CALL_CONVENTION

pcre2_match_data_create(uint32_t oveccount, pcre2_general_context *gcontext)

{

pcre2_match_data *yield;

if (oveccount < 1) oveccount = 1;

if (oveccount > UINT16_MAX) oveccount = UINT16_MAX;

yield = PRIV(memctl_malloc)(

  offsetof(pcre2_match_data, ovector) + 2*oveccount*sizeof(PCRE2_SIZE),

  (pcre2_memctl *)gcontext);

if (yield == NULL) return NULL;

yield->oveccount = oveccount;

yield->flags = 0;

yield->heapframes = NULL;

yield->heapframes_size = 0;

return yield;

}

/*************************************************

*  Create a match data block using pattern data  *

*************************************************/

/* If no context is supplied, use the memory allocator from the code. This code

assumes that a general context contains nothing other than a memory allocator.

If that ever changes, this code will need fixing. */

PCRE2_EXP_DEFN pcre2_match_data * PCRE2_CALL_CONVENTION

pcre2_match_data_create_from_pattern(const pcre2_code *code,

  pcre2_general_context *gcontext)

{

if (gcontext == NULL) gcontext = (pcre2_general_context *)code;

return pcre2_match_data_create(((const pcre2_real_code *)code)->top_bracket + 1,

  gcontext);

}

/*************************************************

*            Free a match data block             *

*************************************************/

PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION

pcre2_match_data_free(pcre2_match_data *match_data)

{

if (match_data != NULL)

  {

  if (match_data->heapframes != NULL)

    match_data->memctl.free(match_data->heapframes,

      match_data->memctl.memory_data);

  if ((match_data->flags & PCRE2_MD_COPIED_SUBJECT) != 0)

    match_data->memctl.free((void *)match_data->subject,

      match_data->memctl.memory_data);

  match_data->memctl.free(match_data, match_data->memctl.memory_data);

  }

}

/*************************************************

*         Get last mark in match                 *

*************************************************/

PCRE2_EXP_DEFN PCRE2_SPTR PCRE2_CALL_CONVENTION

pcre2_get_mark(pcre2_match_data *match_data)

{

return match_data->mark;

}

/*************************************************

*          Get pointer to ovector                *

*************************************************/

PCRE2_EXP_DEFN PCRE2_SIZE * PCRE2_CALL_CONVENTION

pcre2_get_ovector_pointer(pcre2_match_data *match_data)

{

return match_data->ovector;

}

/*************************************************

*          Get number of ovector slots           *

*************************************************/

PCRE2_EXP_DEFN uint32_t PCRE2_CALL_CONVENTION

pcre2_get_ovector_count(pcre2_match_data *match_data)

{

return match_data->oveccount;

}

/*************************************************

*         Get starting code unit in match        *

*************************************************/

PCRE2_EXP_DEFN PCRE2_SIZE PCRE2_CALL_CONVENTION

pcre2_get_startchar(pcre2_match_data *match_data)

{

return match_data->startchar;

}

/*************************************************

*         Get size of match data block           *

*************************************************/

PCRE2_EXP_DEFN PCRE2_SIZE PCRE2_CALL_CONVENTION

pcre2_get_match_data_size(pcre2_match_data *match_data)

{

return offsetof(pcre2_match_data, ovector) +

  2 * (match_data->oveccount) * sizeof(PCRE2_SIZE);

}

/*************************************************

*             Get heapframes size                *

*************************************************/

PCRE2_EXP_DEFN PCRE2_SIZE PCRE2_CALL_CONVENTION

pcre2_get_match_data_heapframes_size(pcre2_match_data *match_data)

{

return match_data->heapframes_size;

}

/* End of pcre2_match_data.c */