ref: 740b766e5a9b0101225c23a5f9920d7d8b8fc67d 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; }