7 #define ITERATIONS 10000
9 int test_memcmp(const void *s1, const void *s2, size_t n);
11 /* test all offsets and lengths */
12 static void test_one(char *s1, char *s2)
14 unsigned long offset, size;
16 for (offset = 0; offset < SIZE; offset++) {
17 for (size = 0; size < (SIZE-offset); size++) {
21 y = memcmp(s1+offset, s2+offset, size);
22 x = test_memcmp(s1+offset, s2+offset, size);
24 if (((x ^ y) < 0) && /* Trick to compare sign */
25 ((x | y) != 0)) { /* check for zero */
26 printf("memcmp returned %d, should have returned %d (offset %ld size %ld)\n", x, y, offset, size);
28 for (i = offset; i < offset+size; i++)
29 printf("%02x ", s1[i]);
32 for (i = offset; i < offset+size; i++)
33 printf("%02x ", s2[i]);
41 static int testcase(void)
47 s1 = memalign(128, SIZE);
53 s2 = memalign(128, SIZE);
61 for (i = 0; i < ITERATIONS; i++) {
65 for (j = 0; j < SIZE; j++)
71 change = random() % SIZE;
72 s2[change] = random() & 0xff;
79 for (i = 0; i < ITERATIONS; i++) {
83 for (j = 0; j < SIZE; j++)
88 /* change multiple bytes, 1/8 of total */
89 for (j = 0; j < SIZE / 8; j++) {
90 change = random() % SIZE;
91 s2[change] = random() & 0xff;
102 return test_harness(testcase, "memcmp");