kc3-lang/gnulib/lib/unigbrk/u32-grapheme-prev.c

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• Hash : a3fd683d
  Author :
  Date : 2017-01-01T02:59:23
  

  version-etc: new year
  
  * build-aux/gendocs.sh (version):
  * doc/gendocs_template:
  * doc/gendocs_template_min:
  * doc/gnulib.texi:
  * lib/version-etc.c (COPYRIGHT_YEAR):
  Update copyright dates by hand in templates and the like.
  * all files: Run 'make update-copyright'.
  

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• lib/unigbrk/u32-grapheme-prev.c

• /* Previous grapheme cluster function.
     Copyright (C) 2010-2017 Free Software Foundation, Inc.
     Written by Ben Pfaff <blp@cs.stanford.edu>, 2010.
  
     This program is free software: you can redistribute it and/or modify it
     under the terms of the GNU Lesser General Public License as published
     by the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include "unigbrk.h"
  
  #include "unistr.h"
  
  const uint32_t *
  u32_grapheme_prev (const uint32_t *s, const uint32_t *start)
  {
    ucs4_t next;
  
    if (s == start)
      return NULL;
  
    u32_prev (&next, s, start);
    for (s--; s != start; s--)
      {
        ucs4_t prev;
  
        if (u32_prev (&prev, s, start) == NULL)
          {
            /* Ill-formed UTF-32 encoding. */
            return start;
          }
  
        if (uc_is_grapheme_break (prev, next))
          break;
  
        next = prev;
      }
  
    return s;
  }
  

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