strnlen.c
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/*
* strnlen test.
*
* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
* See https://llvm.org/LICENSE.txt for license information.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#define _POSIX_C_SOURCE 200809L
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "stringlib.h"
static const struct fun
{
const char *name;
size_t (*fun)(const char *s, size_t m);
} funtab[] = {
#define F(x) {#x, x},
F(strnlen)
#if __aarch64__
F(__strnlen_aarch64)
# if __ARM_FEATURE_SVE
F(__strnlen_aarch64_sve)
# endif
#endif
#undef F
{0, 0}
};
static int test_status;
#define ERR(...) (test_status=1, printf(__VA_ARGS__))
#define A 32
#define SP 512
#define LEN 250000
static char sbuf[LEN+2*A];
static void *alignup(void *p)
{
return (void*)(((uintptr_t)p + A-1) & -A);
}
static void test(const struct fun *fun, int align, int maxlen, int len)
{
char *src = alignup(sbuf);
char *s = src + align;
size_t r;
size_t e = maxlen < len ? maxlen : len - 1;
if (len > LEN || align >= A)
abort();
for (int i = 0; i < len + A; i++)
src[i] = '?';
for (int i = 0; i < len - 2; i++)
s[i] = 'a' + i%23;
s[len - 1] = '\0';
r = fun->fun(s, maxlen);
if (r != e) {
ERR("%s(%p) returned %zu\n", fun->name, s, r);
ERR("input: %.*s\n", align+len+1, src);
ERR("expected: %d\n", len);
abort();
}
}
int main()
{
int r = 0;
for (int i=0; funtab[i].name; i++) {
test_status = 0;
for (int a = 0; a < A; a++) {
int n;
for (n = 1; n < 100; n++)
for (int maxlen = 0; maxlen < 100; maxlen++)
test(funtab+i, a, maxlen, n);
for (; n < LEN; n *= 2) {
test(funtab+i, a, n*2, n);
test(funtab+i, a, n, n);
test(funtab+i, a, n/2, n);
}
}
printf("%s %s\n", test_status ? "FAIL" : "PASS", funtab[i].name);
if (test_status)
r = -1;
}
return r;
}