[thirdparty/glibc.git] / string / memccpy.c

/* Copyright (C) 1991-2025 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library 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 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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 the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <string.h>

#undef __memccpy
#undef memccpy

#ifdef MEMCCPY
# define __memccpy MEMCCPY
#endif

/* Copy no more than N bytes of SRC to DEST, stopping when C is found.
   Return the position in DEST one byte past where C was copied, or
   NULL if C was not found in the first N bytes of SRC.  */
void *
__memccpy (void *dest, const void *src, int c, size_t n)
{
  void *p = memchr (src, c, n);

  if (p != NULL)
    return __mempcpy (dest, src, p - src + 1);

  memcpy (dest, src, n);
  return NULL;
}

weak_alias (__memccpy, memccpy)
Commit	Line	Data
	1	/* Copyright (C) 1991-2025 Free Software Foundation, Inc.
	2	This file is part of the GNU C Library.
	3
	4	The GNU C Library is free software; you can redistribute it and/or
	5	modify it under the terms of the GNU Lesser General Public
	6	License as published by the Free Software Foundation; either
	7	version 2.1 of the License, or (at your option) any later version.
	8
	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	Lesser General Public License for more details.
	13
	14	You should have received a copy of the GNU Lesser General Public
	15	License along with the GNU C Library; if not, see
	16	<https://www.gnu.org/licenses/>. */
	17
	18	#include <string.h>
	19
	20	#undef __memccpy
	21	#undef memccpy
	22
	23	#ifdef MEMCCPY
	24	# define __memccpy MEMCCPY
	25	#endif
	26
	27	/* Copy no more than N bytes of SRC to DEST, stopping when C is found.
	28	Return the position in DEST one byte past where C was copied, or
	29	NULL if C was not found in the first N bytes of SRC. */
	30	void *
	31	__memccpy (void dest, const void src, int c, size_t n)
	32	{
	33	void *p = memchr (src, c, n);
	34
	35	if (p != NULL)
	36	return __mempcpy (dest, src, p - src + 1);
	37
	38	memcpy (dest, src, n);
	39	return NULL;
	40	}
	41
	42	weak_alias (__memccpy, memccpy)