kc3-lang/gnulib/lib/unicase/ulc-casexfrm.c

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• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• lib/unicase/ulc-casexfrm.c

• /* Locale dependent transformation for case insensitive comparison of strings.
     Copyright (C) 2009-2023 Free Software Foundation, Inc.
     Written by Bruno Haible <bruno@clisp.org>, 2009.
  
     This file is free software.
     It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
     You can redistribute it and/or modify it under either
       - the terms of the GNU Lesser General Public License as published
         by the Free Software Foundation, either version 3, or (at your
         option) any later version, or
       - the terms of the GNU General Public License as published by the
         Free Software Foundation; either version 2, or (at your option)
         any later version, or
       - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
  
     This file 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 and the GNU General Public License
     for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License and of the GNU General Public License along with this
     program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include "unicase.h"
  
  #include <errno.h>
  #include <stdlib.h>
  
  #include "uniconv.h"
  
  char *
  ulc_casexfrm (const char *s, size_t n, const char *iso639_language,
                uninorm_t nf,
                char *resultbuf, size_t *lengthp)
  {
    uint8_t convbuf[2048 / sizeof (uint8_t)];
    uint8_t *conv;
    size_t conv_length;
    char *result;
  
    /* Convert the string to UTF-8.  */
    conv_length = sizeof (convbuf) / sizeof (uint8_t);
    conv =
      u8_conv_from_encoding (locale_charset (), iconveh_error, s, n, NULL,
                             convbuf, &conv_length);
    if (conv == NULL)
      /* errno is set here.  */
      return NULL;
  
    /* Case-fold and normalize.  */
    result = u8_casexfrm (conv, conv_length, iso639_language, nf,
                          resultbuf, lengthp);
    if (result == NULL)
      {
        if (conv != convbuf)
          {
            int saved_errno = errno;
            free (conv);
            errno = saved_errno;
          }
        return NULL;
      }
  
    if (conv != convbuf)
      free (conv);
    return result;
  }
  

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