1/*
2 * strnlen test.
3 *
4 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 * See https://llvm.org/LICENSE.txt for license information.
6 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 */
8
9#define _POSIX_C_SOURCE 200809L
10
11#include <stdint.h>
12#include <stdio.h>
13#include <stdlib.h>
14#include <string.h>
15#include <limits.h>
16#include "stringlib.h"
17
18static const struct fun
19{
20 const char *name;
21 size_t (*fun)(const char *s, size_t m);
22} funtab[] = {
23#define F(x) {#x, x},
24F(strnlen)
25#if __aarch64__
26F(__strnlen_aarch64)
27# if __ARM_FEATURE_SVE
28F(__strnlen_aarch64_sve)
29# endif
30#endif
31#undef F
32 {0, 0}
33};
34
35static int test_status;
36#define ERR(...) (test_status=1, printf(__VA_ARGS__))
37
38#define A 32
39#define SP 512
40#define LEN 250000
41static char sbuf[LEN+2*A];
42
43static void *alignup(void *p)
44{
45 return (void*)(((uintptr_t)p + A-1) & -A);
46}
47
48static void test(const struct fun *fun, int align, int maxlen, int len)
49{
50 char *src = alignup(p: sbuf);
51 char *s = src + align;
52 size_t r;
53 size_t e = maxlen < len ? maxlen : len - 1;
54
55 if (len > LEN || align >= A)
56 abort();
57
58 for (int i = 0; i < len + A; i++)
59 src[i] = '?';
60 for (int i = 0; i < len - 2; i++)
61 s[i] = 'a' + i%23;
62 s[len - 1] = '\0';
63
64 r = fun->fun(s, maxlen);
65 if (r != e) {
66 ERR("%s(%p) returned %zu\n", fun->name, s, r);
67 ERR("input: %.*s\n", align+len+1, src);
68 ERR("expected: %d\n", len);
69 abort();
70 }
71}
72
73int main()
74{
75 int r = 0;
76 for (int i=0; funtab[i].name; i++) {
77 test_status = 0;
78 for (int a = 0; a < A; a++) {
79 int n;
80 for (n = 1; n < 100; n++)
81 for (int maxlen = 0; maxlen < 100; maxlen++)
82 test(fun: funtab+i, align: a, maxlen, len: n);
83 for (; n < LEN; n *= 2) {
84 test(fun: funtab+i, align: a, maxlen: n*2, len: n);
85 test(fun: funtab+i, align: a, maxlen: n, len: n);
86 test(fun: funtab+i, align: a, maxlen: n/2, len: n);
87 }
88 }
89 printf(format: "%s %s\n", test_status ? "FAIL" : "PASS", funtab[i].name);
90 if (test_status)
91 r = -1;
92 }
93 return r;
94}
95

source code of libc/AOR_v20.02/string/test/strnlen.c