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[glibc.git] / sysdeps / generic / memccpy.c
blob44a874a9545a27fb5902ee68b201178701420589
1 /* Copyright (C) 1991, 1995, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
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 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #include <string.h>
21 #undef __memccpy
22 #undef memccpy
24 /* Copy no more than N bytes of SRC to DEST, stopping when C is found.
25 Return the position in DEST one byte past where C was copied, or
26 NULL if C was not found in the first N bytes of SRC. */
27 void *
28 __memccpy (dest, src, c, n)
29 void *dest; const void *src;
30 int c; size_t n;
32 register const char *s = src;
33 register char *d = dest;
34 register const int x = (unsigned char) c;
35 register size_t i = n;
37 while (i-- > 0)
38 if ((*d++ = *s++) == x)
39 return d;
41 return NULL;
44 weak_alias (__memccpy, memccpy)