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

/* */

DEFINITIONS

1. u32_strrchr

   1 /* Search character in UTF-32 string.
   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 uint32_t *
  32 u32_strrchr (const uint32_t *s, ucs4_t uc)
     /*  */
  33 {
  34   /* Calling u32_strlen and then searching from the other end would cause more
  35      memory accesses. Avoid that, at the cost of a few more comparisons.  */
  36   uint32_t *result = NULL;
  37 
  38   for (;; s++)
  39     {
  40       if (*s == uc)
  41         result = (uint32_t *) s;
  42       if (*s == 0)
  43         break;
  44     }
  45   return result;
  46 }

/* */