kc3-lang/gnulib/lib/unistr/u-strcspn.h

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

  maint: run 'make update-copyright'
  

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• lib/unistr/u-strcspn.h

• /* Search for some characters in UTF-8/UTF-16/UTF-32 string.
     Copyright (C) 1999, 2002, 2006, 2009-2023 Free Software Foundation, Inc.
     Written by Bruno Haible <bruno@clisp.org>, 2002.
  
     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/>.  */
  
  size_t
  FUNC (const UNIT *str, const UNIT *reject)
  {
    /* Optimize two cases.  */
    if (reject[0] == 0)
      return U_STRLEN (str);
    {
      ucs4_t uc;
      int count = U_STRMBTOUC (&uc, reject);
      if (count >= 0 && reject[count] == 0)
        {
          const UNIT *found = U_STRCHR (str, uc);
          if (found != NULL)
            return found - str;
          else
            return U_STRLEN (str);
        }
    }
    /* General case.  */
    {
      const UNIT *ptr = str;
  
      for (;;)
        {
          ucs4_t uc;
          int count = U_STRMBTOUC (&uc, ptr);
          if (count == 0)
            return ptr - str;
          if (count < 0)
            break;
          if (U_STRCHR (reject, uc))
            return ptr - str;
          ptr += count;
        }
      return U_STRLEN (str);
    }
  }
  

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