1/*
2 * strncmp 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#include <stdint.h>
10#include <stdio.h>
11#include <stdlib.h>
12#include <string.h>
13#include "stringlib.h"
14
15static const struct fun
16{
17 const char *name;
18 int (*fun)(const char *, const char *, size_t);
19} funtab[] = {
20#define F(x) {#x, x},
21F(strncmp)
22#if __aarch64__
23F(__strncmp_aarch64)
24# if __ARM_FEATURE_SVE
25F(__strncmp_aarch64_sve)
26# endif
27#endif
28#undef F
29 {0, 0}
30};
31
32static int test_status;
33#define ERR(...) (test_status=1, printf(__VA_ARGS__))
34
35#define A 32
36#define LEN 250000
37static char s1buf[LEN+2*A];
38static char s2buf[LEN+2*A];
39
40static void *alignup(void *p)
41{
42 return (void*)(((uintptr_t)p + A-1) & -A);
43}
44
45static void test(const struct fun *fun, int s1align, int s2align, int maxlen, int diffpos, int len)
46{
47 char *src1 = alignup(p: s1buf);
48 char *src2 = alignup(p: s2buf);
49 char *s1 = src1 + s1align;
50 char *s2 = src2 + s2align;
51 int r;
52
53 if (len > LEN || s1align >= A || s2align >= A)
54 abort();
55 if (diffpos > 1 && diffpos >= len-1)
56 abort();
57
58 for (int i = 0; i < len+A; i++)
59 src1[i] = src2[i] = '?';
60 for (int i = 0; i < len-1; i++)
61 s1[i] = s2[i] = 'a' + i%23;
62 if (diffpos > 1)
63 s1[diffpos]++;
64 s1[len] = s2[len] = '\0';
65
66 r = fun->fun(s1, s2, maxlen);
67
68 diffpos = maxlen <= diffpos ? 0 : diffpos;
69
70 if (((diffpos <= 1) && r != 0) || (diffpos > 1 && r == 0)) {
71 ERR("%s(align %d, align %d, %d (%d)) failed, returned %d (%d)\n",
72 fun->name, s1align, s2align, maxlen, len, r, diffpos);
73 ERR("src1: %.*s\n", s1align+len+1, src1);
74 ERR("src2: %.*s\n", s2align+len+1, src2);
75 }
76}
77
78int main()
79{
80 int r = 0;
81 for (int i=0; funtab[i].name; i++) {
82 test_status = 0;
83 for (int d = 0; d < A; d++)
84 for (int s = 0; s < A; s++) {
85 int n;
86 for (n = 0; n < 100; n++) {
87 test(fun: funtab+i, s1align: d, s2align: s, maxlen: n, diffpos: 0, len: n);
88 test(fun: funtab+i, s1align: d, s2align: s, maxlen: n, diffpos: n/2, len: n);
89 test(fun: funtab+i, s1align: d, s2align: s, maxlen: n/2, diffpos: 0, len: n);
90 test(fun: funtab+i, s1align: d, s2align: s, maxlen: n/2, diffpos: n/2, len: n);
91 }
92 for (; n < LEN; n *= 2) {
93 test(fun: funtab+i, s1align: d, s2align: s, maxlen: n, diffpos: 0, len: n);
94 test(fun: funtab+i, s1align: d, s2align: s, maxlen: n, diffpos: n/2, len: n);
95 test(fun: funtab+i, s1align: d, s2align: s, maxlen: n/2, diffpos: 0, len: n);
96 test(fun: funtab+i, s1align: d, s2align: s, maxlen: n/2, diffpos: n/2, len: n);
97 }
98 }
99 printf(format: "%s %s\n", test_status ? "FAIL" : "PASS", funtab[i].name);
100 if (test_status)
101 r = -1;
102 }
103 return r;
104}
105

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