kc3-lang/gnulib/lib/wcscmp-impl.h

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• Hash : 4b440d35
  Author :
  Date : 2023-04-19T02:14:09
  

  wcscmp: Work around two ISO C compliance bugs on several platforms.
  
  * lib/wchar.in.h (wcscmp): Consider REPLACE_WCSCMP.
  * lib/wcscmp-impl.h (wcscmp): Don't assume that the two wide characters
  are in the range 0..INT_MAX.
  * m4/wcscmp.m4 (gl_FUNC_WCSCMP): Test whether wcscmp works for all wide
  characters. Set REPLACE_WCSCMP.
  * m4/wchar_h.m4 (gl_WCHAR_H_DEFAULTS): Initialize REPLACE_WCSCMP.
  * modules/wchar (Makefile.am): Substitute REPLACE_WCSCMP.
  * modules/wcscmp (Status, Notice): Un-obsolete this module.
  (configure.ac): Consider REPLACE_WCSCMP.
  * doc/posix-functions/wcscmp.texi: Mention the two bugs.
  

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• lib/wcscmp-impl.h

• /* Compare two wide strings.
     Copyright (C) 1999, 2011-2023 Free Software Foundation, Inc.
     Written by Bruno Haible <bruno@clisp.org>, 1999.
  
     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 3 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/>.  */
  
  int
  wcscmp (const wchar_t *s1, const wchar_t *s2)
  {
    for (;;)
      {
        wchar_t wc1 = *s1++;
        wchar_t wc2 = *s2++;
        if (wc1 != (wchar_t)'\0' && wc1 == wc2)
          continue;
        /* ISO C requires wcscmp to work with all wchar_t values.
           We cannot assume that wc1 and wc2 are in the range 0..INT_MAX.  */
        return _GL_CMP (wc1, wc2);
               /* > 0 if wc1 > wc2, < 0 if wc1 < wc2,
                  = 0 if wc1 and wc2 are both '\0'.  */
      }
  }
  

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