1 /* Test and measure strcasestr functions.
2 Copyright (C) 2010-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #define TEST_MAIN
20 #define TEST_NAME "strcasestr"
21 #include "test-string.h"
22
23
24 #define STRCASESTR c_strcasestr
25 #define NO_ALIAS
26 #define __strncasecmp strncasecmp
27 #define __strnlen strnlen
28 #include "strcasestr.c"
29
30 /* Naive implementation to verify results. */
31 static char *
32 simple_strcasestr (const char *s1, const char *s2)
33 {
34 ssize_t s1len = strlen (s1);
35 ssize_t s2len = strlen (s2);
36
37 if (s2len > s1len)
38 return NULL;
39
40 for (ssize_t i = 0; i <= s1len - s2len; ++i)
41 {
42 size_t j;
43 for (j = 0; j < s2len; ++j)
44 if (tolower (s1[i + j]) != tolower (s2[j]))
45 break;
46 if (j == s2len)
47 return (char *) s1 + i;
48 }
49
50 return NULL;
51 }
52
53
54 typedef char *(*proto_t) (const char *, const char *);
55
56 IMPL (c_strcasestr, 0)
57 IMPL (strcasestr, 1)
58
59
60 static int
61 check_result (impl_t *impl, const char *s1, const char *s2,
62 char *exp_result)
63 {
64 char *result = CALL (impl, s1, s2);
65 if (result != exp_result)
66 {
67 error (0, 0, "Wrong result in function %s %s %s", impl->name,
68 (result == NULL) ? "(null)" : result,
69 (exp_result == NULL) ? "(null)" : exp_result);
70 ret = 1;
71 return -1;
72 }
73 return 0;
74 }
75
76 static void
77 do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result)
78 {
79 if (check_result (impl, s1, s2, exp_result) < 0)
80 return;
81 }
82
83
84 static void
85 do_test (size_t align1, size_t align2, size_t len1, size_t len2,
86 int fail)
87 {
88 char *s1 = (char *) (buf1 + align1);
89 char *s2 = (char *) (buf2 + align2);
90
91 static const char d[] = "1234567890abcxyz";
92 #define dl (sizeof (d) - 1)
93 char *ss2 = s2;
94 for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
95 {
96 size_t t = l > dl ? dl : l;
97 ss2 = mempcpy (ss2, d, t);
98 }
99 s2[len2] = '\0';
100
101 if (fail)
102 {
103 char *ss1 = s1;
104 for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
105 {
106 size_t t = l > dl ? dl : l;
107 memcpy (ss1, d, t);
108 ++ss1[len2 > 7 ? 7 : len2 - 1];
109 ss1 += t;
110 }
111 }
112 else
113 {
114 memset (s1, '0', len1);
115 for (size_t i = 0; i < len2; ++i)
116 s1[len1 - len2 + i] = toupper (s2[i]);
117 }
118 s1[len1] = '\0';
119
120 FOR_EACH_IMPL (impl, 0)
121 do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
122 }
123
124 static void
125 check1 (void)
126 {
127 const char s1[] = "AOKB";
128 const char s2[] = "OK";
129 char *exp_result;
130
131 exp_result = simple_strcasestr (s1, s2);
132 FOR_EACH_IMPL (impl, 0)
133 check_result (impl, s1, s2, exp_result);
134 }
135
136 static int
137 test_main (void)
138 {
139 test_init ();
140
141 check1 ();
142
143 printf ("%23s", "");
144 FOR_EACH_IMPL (impl, 0)
145 printf ("\t%s", impl->name);
146 putchar ('\n');
147
148 for (size_t klen = 2; klen < 32; ++klen)
149 for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
150 {
151 do_test (0, 0, hlen, klen, 0);
152 do_test (0, 0, hlen, klen, 1);
153 do_test (0, 3, hlen, klen, 0);
154 do_test (0, 3, hlen, klen, 1);
155 do_test (0, 9, hlen, klen, 0);
156 do_test (0, 9, hlen, klen, 1);
157 do_test (0, 15, hlen, klen, 0);
158 do_test (0, 15, hlen, klen, 1);
159
160 do_test (3, 0, hlen, klen, 0);
161 do_test (3, 0, hlen, klen, 1);
162 do_test (3, 3, hlen, klen, 0);
163 do_test (3, 3, hlen, klen, 1);
164 do_test (3, 9, hlen, klen, 0);
165 do_test (3, 9, hlen, klen, 1);
166 do_test (3, 15, hlen, klen, 0);
167 do_test (3, 15, hlen, klen, 1);
168
169 do_test (9, 0, hlen, klen, 0);
170 do_test (9, 0, hlen, klen, 1);
171 do_test (9, 3, hlen, klen, 0);
172 do_test (9, 3, hlen, klen, 1);
173 do_test (9, 9, hlen, klen, 0);
174 do_test (9, 9, hlen, klen, 1);
175 do_test (9, 15, hlen, klen, 0);
176 do_test (9, 15, hlen, klen, 1);
177
178 do_test (15, 0, hlen, klen, 0);
179 do_test (15, 0, hlen, klen, 1);
180 do_test (15, 3, hlen, klen, 0);
181 do_test (15, 3, hlen, klen, 1);
182 do_test (15, 9, hlen, klen, 0);
183 do_test (15, 9, hlen, klen, 1);
184 do_test (15, 15, hlen, klen, 0);
185 do_test (15, 15, hlen, klen, 1);
186 }
187
188 do_test (0, 0, page_size - 1, 16, 0);
189 do_test (0, 0, page_size - 1, 16, 1);
190
191 return ret;
192 }
193
194 #include <support/test-driver.c>