jehanne/sys/src/lib/jehanne/port/memchr.c

27 lines
624 B
C

/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
#include <u.h>
#include <libc.h>
void*
jehanne_memchr(const void *ap, int c, uint32_t n)
{
const char *sp;
sp = ap;
c &= 0xFF;
while(n > 0) {
if(*sp++ == c)
return (char *)sp-1;
n--;
}
return 0;
}