/*************************************************
*      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) 2014 University of Cambridge

-----------------------------------------------------------------------------
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    * Redistributions of source code must retain the above copyright notice,
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    * Redistributions in binary form must reproduce the above copyright
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      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
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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*/


#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "pcre2_internal.h"


/*************************************************
*           Match a Regular Expression           *
*************************************************/

/* This function applies a compiled re to a subject string and picks out
portions of the string if it matches. Two elements in the vector are set for
each substring: the offsets to the start and end of the substring.

Arguments:
  context         points a PCRE2 context
  code            points to the compiled expression
  subject         points to the subject string
  length          length of subject string (may contain binary zeros)
  start_offset    where to start in the subject string
  options         option bits
  match_data      points to a match_data block 

Returns:          > 0 => success; value is the number of ovector pairs filled
                  = 0 => success, but ovector is not big enough
                   -1 => failed to match (PCRE_ERROR_NOMATCH)
                 < -1 => some kind of unexpected problem
*/

/* FIXME: this is currently a placeholder function */

PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION
pcre2_match(const pcre2_code *code, PCRE2_SPTR subject, int length, 
  size_t start_offset, uint32_t options, pcre2_match_data *match_data, 
  pcre2_match_context *mcontext)
{
int rc = PCRE2_ERROR_NOMATCH;

mcontext=mcontext;length=length;
options=options;


/* Fudges for testing pcre2test */

if (subject[0] == 'Y')
  {
  rc = 0;
  match_data->code = code;
  match_data->subject = subject;  
  match_data->leftchar = 0;
  match_data->rightchar = 3;
  match_data->startchar = 0;
  match_data->mark = NULL;
  
  switch (match_data->oveccount)
    {
    case 0: break;
    
    case 1: match_data->ovector[0] = start_offset; 
            match_data->ovector[1] = start_offset + 4;
            break;
            
    default:
    case 6:  match_data->ovector[10] = PCRE2_UNSET;
             match_data->ovector[11] = PCRE2_UNSET; 
            
    case 5:  match_data->ovector[8] = PCRE2_UNSET;
             match_data->ovector[9] = PCRE2_UNSET; 
            
    case 4:  match_data->ovector[6] = start_offset + 3;
             match_data->ovector[7] = start_offset + 4; 
             rc += 2; 
            
    case 3:  match_data->ovector[4] = PCRE2_UNSET;
             match_data->ovector[5] = PCRE2_UNSET; 
            
    case 2:  match_data->ovector[0] = start_offset; 
             match_data->ovector[1] = start_offset + 4;
             match_data->ovector[2] = start_offset + 1;    
             match_data->ovector[3] = start_offset + 3;
             match_data->mark = subject; 
             rc += 2;
             break; 
    }  
    
  } 

else if (subject[0] == 'P')
  {
  rc = PCRE2_ERROR_PARTIAL;
  match_data->code = code;
  match_data->subject = subject;  
  match_data->leftchar = 0;
  match_data->rightchar = length;
  match_data->startchar = 1;
  match_data->mark = NULL;
  } 


match_data->rc = rc;
return rc; 
}    

/* End of pcre2_match.c */