mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 20:51:11 +00:00
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* Copyright (C) 1991, 1992, 1995 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <ansidecl.h>
|
|
#include <string.h>
|
|
|
|
|
|
/* 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. */
|
|
PTR
|
|
DEFUN(__memccpy, (dest, src, c, n),
|
|
PTR dest AND CONST PTR src AND int c AND size_t nbytes)
|
|
{
|
|
/* Except when N > 65535, this is what a hand-coded version would
|
|
do anyway. */
|
|
|
|
PTR found = memchr (src, c, n);
|
|
|
|
if (found == NULL)
|
|
{
|
|
(void) memcpy (dest, src, n);
|
|
return NULL;
|
|
}
|
|
|
|
(void) memcpy (dest, src, (char *) found + 1 - (char *) src);
|
|
return (PTR) ((char *) dest + ((char *) found + 1 - (char *) src));
|
|
}
|
|
|
|
weak_alias (__memccpy, memccpy)
|