128 lines
1.9 KiB
C
128 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <malloc.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include "utils.h"
|
|
|
|
#define SIZE 256
|
|
#define ITERATIONS 1000
|
|
#define ITERATIONS_BENCH 100000
|
|
|
|
int test_strlen(const void *s);
|
|
|
|
/* test all offsets and lengths */
|
|
static void test_one(char *s)
|
|
{
|
|
unsigned long offset;
|
|
|
|
for (offset = 0; offset < SIZE; offset++) {
|
|
int x, y;
|
|
unsigned long i;
|
|
|
|
y = strlen(s + offset);
|
|
x = test_strlen(s + offset);
|
|
|
|
if (x != y) {
|
|
printf("strlen() returned %d, should have returned %d (%p offset %ld)\n", x, y, s, offset);
|
|
|
|
for (i = offset; i < SIZE; i++)
|
|
printf("%02x ", s[i]);
|
|
printf("\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
static void bench_test(char *s)
|
|
{
|
|
struct timespec ts_start, ts_end;
|
|
int i;
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &ts_start);
|
|
|
|
for (i = 0; i < ITERATIONS_BENCH; i++)
|
|
test_strlen(s);
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &ts_end);
|
|
|
|
printf("len %3.3d : time = %.6f\n", test_strlen(s), ts_end.tv_sec - ts_start.tv_sec + (ts_end.tv_nsec - ts_start.tv_nsec) / 1e9);
|
|
}
|
|
|
|
static int testcase(void)
|
|
{
|
|
char *s;
|
|
unsigned long i;
|
|
|
|
s = memalign(128, SIZE);
|
|
if (!s) {
|
|
perror("memalign");
|
|
exit(1);
|
|
}
|
|
|
|
srandom(1);
|
|
|
|
memset(s, 0, SIZE);
|
|
for (i = 0; i < SIZE; i++) {
|
|
char c;
|
|
|
|
do {
|
|
c = random() & 0x7f;
|
|
} while (!c);
|
|
s[i] = c;
|
|
test_one(s);
|
|
}
|
|
|
|
for (i = 0; i < ITERATIONS; i++) {
|
|
unsigned long j;
|
|
|
|
for (j = 0; j < SIZE; j++) {
|
|
char c;
|
|
|
|
do {
|
|
c = random() & 0x7f;
|
|
} while (!c);
|
|
s[j] = c;
|
|
}
|
|
for (j = 0; j < sizeof(long); j++) {
|
|
s[SIZE - 1 - j] = 0;
|
|
test_one(s);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < SIZE; i++) {
|
|
char c;
|
|
|
|
do {
|
|
c = random() & 0x7f;
|
|
} while (!c);
|
|
s[i] = c;
|
|
}
|
|
|
|
bench_test(s);
|
|
|
|
s[16] = 0;
|
|
bench_test(s);
|
|
|
|
s[8] = 0;
|
|
bench_test(s);
|
|
|
|
s[4] = 0;
|
|
bench_test(s);
|
|
|
|
s[3] = 0;
|
|
bench_test(s);
|
|
|
|
s[2] = 0;
|
|
bench_test(s);
|
|
|
|
s[1] = 0;
|
|
bench_test(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
return test_harness(testcase, "strlen");
|
|
}
|