/* Search character in UTF-32 string.
   Copyright (C) 1999, 2002, 2006, 2009-2025 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/>.  */

/* Don't use the const-improved function macros in this compilation unit.  */
#define _LIBUNISTRING_NO_CONST_GENERICS

#include <config.h>

/* Specification.  */
#include "unistr.h"

uint32_t *
u32_strrchr (const uint32_t *s, ucs4_t uc)
{
  /* Calling u32_strlen and then searching from the other end would cause more
     memory accesses. Avoid that, at the cost of a few more comparisons.  */
  uint32_t *result = NULL;

  for (;; s++)
    {
      if (*s == uc)
        result = (uint32_t *) s;
      if (*s == 0)
        break;
    }
  return result;
}
