ref: 5b5416aa05b0f66632ded929383c32c0a5aaa375 dir: /sys/src/libc/port/memchr.c/
#include <u.h> #include <libc.h> void* memchr(void *ap, int c, ulong n) { uchar *sp; sp = ap; c &= 0xFF; while(n > 0) { if(*sp++ == c) return sp-1; n--; } return 0; }