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      1 /*************************************************
      2 *      Perl-Compatible Regular Expressions       *
      3 *************************************************/
      4 
      5 /* PCRE is a library of functions to support regular expressions whose syntax
      6 and semantics are as close as possible to those of the Perl 5 language.
      7 
      8                        Written by Philip Hazel
      9      Original API code Copyright (c) 1997-2012 University of Cambridge
     10          New API code Copyright (c) 2016 University of Cambridge
     11 
     12 -----------------------------------------------------------------------------
     13 Redistribution and use in source and binary forms, with or without
     14 modification, are permitted provided that the following conditions are met:
     15 
     16     * Redistributions of source code must retain the above copyright notice,
     17       this list of conditions and the following disclaimer.
     18 
     19     * Redistributions in binary form must reproduce the above copyright
     20       notice, this list of conditions and the following disclaimer in the
     21       documentation and/or other materials provided with the distribution.
     22 
     23     * Neither the name of the University of Cambridge nor the names of its
     24       contributors may be used to endorse or promote products derived from
     25       this software without specific prior written permission.
     26 
     27 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
     28 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
     31 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37 POSSIBILITY OF SUCH DAMAGE.
     38 -----------------------------------------------------------------------------
     39 */
     40 
     41 
     42 #ifdef HAVE_CONFIG_H
     43 #include "config.h"
     44 #endif
     45 
     46 #include "pcre2_internal.h"
     47 
     48 
     49 
     50 /*************************************************
     51 *  Create a match data block given ovector size  *
     52 *************************************************/
     53 
     54 /* A minimum of 1 is imposed on the number of ovector triplets. */
     55 
     56 PCRE2_EXP_DEFN pcre2_match_data * PCRE2_CALL_CONVENTION
     57 pcre2_match_data_create(uint32_t oveccount, pcre2_general_context *gcontext)
     58 {
     59 pcre2_match_data *yield;
     60 if (oveccount < 1) oveccount = 1;
     61 yield = PRIV(memctl_malloc)(
     62   sizeof(pcre2_match_data) + 3*oveccount*sizeof(PCRE2_SIZE),
     63   (pcre2_memctl *)gcontext);
     64 if (yield == NULL) return NULL;
     65 yield->oveccount = oveccount;
     66 return yield;
     67 }
     68 
     69 
     70 
     71 /*************************************************
     72 *  Create a match data block using pattern data  *
     73 *************************************************/
     74 
     75 /* If no context is supplied, use the memory allocator from the code. */
     76 
     77 PCRE2_EXP_DEFN pcre2_match_data * PCRE2_CALL_CONVENTION
     78 pcre2_match_data_create_from_pattern(const pcre2_code *code,
     79   pcre2_general_context *gcontext)
     80 {
     81 if (gcontext == NULL) gcontext = (pcre2_general_context *)code;
     82 return pcre2_match_data_create(((pcre2_real_code *)code)->top_bracket + 1,
     83   gcontext);
     84 }
     85 
     86 
     87 
     88 /*************************************************
     89 *            Free a match data block             *
     90 *************************************************/
     91 
     92 PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION
     93 pcre2_match_data_free(pcre2_match_data *match_data)
     94 {
     95 if (match_data != NULL)
     96   match_data->memctl.free(match_data, match_data->memctl.memory_data);
     97 }
     98 
     99 
    100 
    101 /*************************************************
    102 *         Get last mark in match                 *
    103 *************************************************/
    104 
    105 PCRE2_EXP_DEFN PCRE2_SPTR PCRE2_CALL_CONVENTION
    106 pcre2_get_mark(pcre2_match_data *match_data)
    107 {
    108 return match_data->mark;
    109 }
    110 
    111 
    112 
    113 /*************************************************
    114 *          Get pointer to ovector                *
    115 *************************************************/
    116 
    117 PCRE2_EXP_DEFN PCRE2_SIZE * PCRE2_CALL_CONVENTION
    118 pcre2_get_ovector_pointer(pcre2_match_data *match_data)
    119 {
    120 return match_data->ovector;
    121 }
    122 
    123 
    124 
    125 /*************************************************
    126 *          Get number of ovector slots           *
    127 *************************************************/
    128 
    129 PCRE2_EXP_DEFN uint32_t PCRE2_CALL_CONVENTION
    130 pcre2_get_ovector_count(pcre2_match_data *match_data)
    131 {
    132 return match_data->oveccount;
    133 }
    134 
    135 
    136 
    137 /*************************************************
    138 *         Get starting code unit in match        *
    139 *************************************************/
    140 
    141 PCRE2_EXP_DEFN PCRE2_SIZE PCRE2_CALL_CONVENTION
    142 pcre2_get_startchar(pcre2_match_data *match_data)
    143 {
    144 return match_data->startchar;
    145 }
    146 
    147 /* End of pcre2_match_data.c */
    148