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// 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");
}
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