kc3-lang/gnulib/lib/mbsnlen.c

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• Hash : 7b089321
  Author :
  Date : 2025-01-01T09:24:36
  

  maint: run 'make update-copyright'
  

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• lib/mbsnlen.c

• /* Counting the multibyte characters in a string.
     Copyright (C) 2007-2025 Free Software Foundation, Inc.
     Written by Bruno Haible <bruno@clisp.org>, 2007.
  
     This file 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 2.1 of the
     License, or (at your option) any later version.
  
     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 for more details.
  
     You should have received a copy of the GNU Lesser General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <string.h>
  
  #include <stdlib.h>
  
  #if GNULIB_MCEL_PREFER
  # include "mcel.h"
  #else
  # include "mbiterf.h"
  #endif
  
  /* Return the number of multibyte characters in the character string starting
     at STRING and ending at STRING + LEN.  */
  size_t
  mbsnlen (const char *string, size_t len)
  {
    if (MB_CUR_MAX > 1)
      {
        size_t count = 0;
  
        const char *string_end = string + len;
  
  #if GNULIB_MCEL_PREFER
        for (; string < string_end; string += mcel_scan (string, string_end).len)
          count++;
  #else
        mbif_state_t state;
        const char *iter;
        for (mbif_init (state), iter = string; mbif_avail (state, iter, string_end); )
          {
            mbchar_t cur = mbif_next (state, iter, string_end);
            count++;
            iter += mb_len (cur);
          }
  #endif
  
        return count;
      }
    else
      return len;
  }
  

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