ref: 8f4053d1efa1ee75a7bea09e624f1134d71a289a
dir: /sys/src/libc/port/memccpy.c/
#include <u.h> #include <libc.h> void* memccpy(void *a1, void *a2, int c, usize n) { uchar *s1, *s2; s1 = a1; s2 = a2; c &= 0xFF; while(n > 0) { if((*s1++ = *s2++) == c) return s1; n--; } return 0; }