ref: cc4ac997a0da6ea60e23ffb5f8c9361a3eebef32 dir: /sys/src/libc/port/memchr.c/
#include <u.h> #include <libc.h> void* memchr(void *ap, int c, usize n) { uchar *sp; sp = ap; c &= 0xFF; while(n > 0) { if(*sp++ == c) return sp-1; n--; } return 0; }