/[pcre]/code/trunk/pcre_exec.c
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Diff of /code/trunk/pcre_exec.c

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revision 335 by ph10, Sat Apr 12 14:36:14 2008 UTC revision 336 by ph10, Sat Apr 12 15:59:03 2008 UTC
# Line 1731  for (;;) Line 1731  for (;;)
1731      case OP_REF:      case OP_REF:
1732        {        {
1733        offset = GET2(ecode, 1) << 1;               /* Doubled ref number */        offset = GET2(ecode, 1) << 1;               /* Doubled ref number */
1734        ecode += 3;                                 /* Advance past item */        ecode += 3;
1735    
1736        /* If the reference is unset, set the length to be longer than the amount        /* If the reference is unset, there are two possibilities:
1737        of subject left; this ensures that every attempt at a match fails. We  
1738        can't just fail here, because of the possibility of quantifiers with zero        (a) In the default, Perl-compatible state, set the length to be longer
1739        minima. */        than the amount of subject left; this ensures that every attempt at a
1740          match fails. We can't just fail here, because of the possibility of
1741        length = (offset >= offset_top || md->offset_vector[offset] < 0)?        quantifiers with zero minima.
1742          md->end_subject - eptr + 1 :  
1743          md->offset_vector[offset+1] - md->offset_vector[offset];        (b) If the JavaScript compatibility flag is set, set the length to zero
1744          so that the back reference matches an empty string.
1745    
1746          Otherwise, set the length to the length of what was matched by the
1747          referenced subpattern. */
1748    
1749          if (offset >= offset_top || md->offset_vector[offset] < 0)
1750            length = (md->jscript_compat)? 0 : md->end_subject - eptr + 1;
1751          else
1752            length = md->offset_vector[offset+1] - md->offset_vector[offset];
1753    
1754        /* Set up for repetition, or handle the non-repeated case */        /* Set up for repetition, or handle the non-repeated case */
1755    
# Line 4458  end_subject = md->end_subject; Line 4467  end_subject = md->end_subject;
4467    
4468  md->endonly = (re->options & PCRE_DOLLAR_ENDONLY) != 0;  md->endonly = (re->options & PCRE_DOLLAR_ENDONLY) != 0;
4469  utf8 = md->utf8 = (re->options & PCRE_UTF8) != 0;  utf8 = md->utf8 = (re->options & PCRE_UTF8) != 0;
4470    md->jscript_compat = (re->options & PCRE_JAVASCRIPT_COMPAT) != 0;
4471    
4472  md->notbol = (options & PCRE_NOTBOL) != 0;  md->notbol = (options & PCRE_NOTBOL) != 0;
4473  md->noteol = (options & PCRE_NOTEOL) != 0;  md->noteol = (options & PCRE_NOTEOL) != 0;

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