ref: 4a120a381652668b7eb9313d9b8ca1835ddccb91
dir: /sys/src/libc/port/memcmp.c/
#include <u.h> #include <libc.h> int memcmp(void *a1, void *a2, ulong n) { uchar *s1, *s2; uint c1, c2; s1 = a1; s2 = a2; while(n > 0) { c1 = *s1++; c2 = *s2++; if(c1 != c2) { if(c1 > c2) return 1; return -1; } n--; } return 0; }