root/maint/gnulib/lib/unistr/u32-strncmp.c

/* */

DEFINITIONS

1. u32_strncmp

   1 /* Compare UTF-32 strings.
   2    Copyright (C) 1999, 2002, 2006, 2009-2021 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2002.
   4 
   5    This file is free software.
   6    It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
   7    You can redistribute it and/or modify it under either
   8      - the terms of the GNU Lesser General Public License as published
   9        by the Free Software Foundation; either version 3, or (at your
  10        option) any later version, or
  11      - the terms of the GNU General Public License as published by the
  12        Free Software Foundation; either version 2, or (at your option)
  13        any later version, or
  14      - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
  15 
  16    This file is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    Lesser General Public License and the GNU General Public License
  20    for more details.
  21 
  22    You should have received a copy of the GNU Lesser General Public
  23    License and of the GNU General Public License along with this
  24    program.  If not, see <https://www.gnu.org/licenses/>.  */
  25 
  26 #include <config.h>
  27 
  28 /* Specification.  */
  29 #include "unistr.h"
  30 
  31 int
  32 u32_strncmp (const uint32_t *s1, const uint32_t *s2, size_t n)
     /*  */
  33 {
  34   for (; n > 0;)
  35     {
  36       uint32_t uc1 = *s1++;
  37       uint32_t uc2 = *s2++;
  38       if (uc1 != 0 && uc1 == uc2)
  39         {
  40           n--;
  41           continue;
  42         }
  43       /* Note that uc1 and uc2 each have at most 31 bits. */
  44       return (int)uc1 - (int)uc2;
  45       /* > 0 if uc1 > uc2, < 0 if uc1 < uc2, = 0 if uc1 and uc2 are both 0.  */
  46     }
  47   return 0;
  48 }

/* */