minix/lib/libc/ansi/memchr.c

23 lines
445 B
C

/*
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
* See the copyright notice in the ACK home directory, in the file "Copyright".
*/
/* $Header$ */
#include <string.h>
void *
memchr(const void *s, register int c, register size_t n)
{
register const unsigned char *s1 = s;
c = (unsigned char) c;
if (n) {
n++;
while (--n > 0) {
if (*s1++ != c) continue;
return (void *) --s1;
}
}
return NULL;
}