diff options
Diffstat (limited to 'usr/src/lib/libast/common/comp/memchr.c')
| -rw-r--r-- | usr/src/lib/libast/common/comp/memchr.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/usr/src/lib/libast/common/comp/memchr.c b/usr/src/lib/libast/common/comp/memchr.c new file mode 100644 index 0000000000..2baf827ca2 --- /dev/null +++ b/usr/src/lib/libast/common/comp/memchr.c @@ -0,0 +1,49 @@ +/*********************************************************************** +* * +* This software is part of the ast package * +* Copyright (c) 1985-2007 AT&T Knowledge Ventures * +* and is licensed under the * +* Common Public License, Version 1.0 * +* by AT&T Knowledge Ventures * +* * +* A copy of the License is available at * +* http://www.opensource.org/licenses/cpl1.0.txt * +* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * +* * +* Information and Software Systems Research * +* AT&T Research * +* Florham Park NJ * +* * +* Glenn Fowler <gsf@research.att.com> * +* David Korn <dgk@research.att.com> * +* Phong Vo <kpv@research.att.com> * +* * +***********************************************************************/ +#pragma prototyped + +#include <ast.h> + +#if _lib_memchr + +NoN(memchr) + +#else + +/* + * Return the ptr in sp at which the character c appears; + * 0 if not found in n chars; don't stop at \0. + */ + +void* +memchr(const void* asp, register int c, size_t n) +{ + register const char* sp = (char*)asp; + register const char* ep = sp + n; + + while (sp < ep) + if (*sp++ == c) + return(--sp); + return(0); +} + +#endif |