1 /* Test of case-insensitive searching in a string.
2 Copyright (C) 2007 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
22 #include "c-strcasestr.h"
28 #define ASSERT(expr) \
33 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
43 const char input[] = "foo";
44 const char *result = c_strcasestr (input, "");
45 ASSERT (result == input);
49 const char input[] = "foo";
50 const char *result = c_strcasestr (input, "O");
51 ASSERT (result == input + 1);
55 const char input[] = "ABC ABCDAB ABCDABCDABDE";
56 const char *result = c_strcasestr (input, "ABCDaBD");
57 ASSERT (result == input + 15);
61 const char input[] = "ABC ABCDAB ABCDABCDABDE";
62 const char *result = c_strcasestr (input, "ABCDaBE");
63 ASSERT (result == NULL);
66 /* Check that a very long haystack is handled quickly if the needle is
67 short and occurs near the beginning. */
69 size_t repeat = 10000;
72 "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
73 "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaAaaaaaaAAAAaaaaaaa"
74 "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
75 char *haystack = (char *) malloc (m + 1);
78 memset (haystack, 'A', m);
82 for (; repeat > 0; repeat--)
84 ASSERT (c_strcasestr (haystack, needle) == haystack + 1);
91 /* Check that a very long needle is discarded quickly if the haystack is
94 size_t repeat = 10000;
97 "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
98 "ABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABAB";
99 char *needle = (char *) malloc (m + 1);
102 memset (needle, 'A', m);
105 for (; repeat > 0; repeat--)
107 ASSERT (c_strcasestr (haystack, needle) == NULL);
114 /* Check that the asymptotic worst-case complexity is not quadratic. */
117 char *haystack = (char *) malloc (2 * m + 2);
118 char *needle = (char *) malloc (m + 2);
119 if (haystack != NULL && needle != NULL)
123 memset (haystack, 'A', 2 * m);
124 haystack[2 * m] = 'B';
125 haystack[2 * m + 1] = '\0';
127 memset (needle, 'a', m);
129 needle[m + 1] = '\0';
131 result = c_strcasestr (haystack, needle);
132 ASSERT (result == haystack + m);
136 if (haystack != NULL)