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. */
24 #include "c-strcasestr.h"
30 #define ASSERT(expr) \
35 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
45 const char input[] = "foo";
46 const char *result = c_strcasestr (input, "");
47 ASSERT (result == input);
51 const char input[] = "foo";
52 const char *result = c_strcasestr (input, "O");
53 ASSERT (result == input + 1);
57 const char input[] = "ABC ABCDAB ABCDABCDABDE";
58 const char *result = c_strcasestr (input, "ABCDaBD");
59 ASSERT (result == input + 15);
63 const char input[] = "ABC ABCDAB ABCDABCDABDE";
64 const char *result = c_strcasestr (input, "ABCDaBE");
65 ASSERT (result == NULL);
68 /* Check that a very long haystack is handled quickly if the needle is
69 short and occurs near the beginning. */
71 size_t repeat = 10000;
74 "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
75 "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaAaaaaaaAAAAaaaaaaa"
76 "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
77 char *haystack = (char *) malloc (m + 1);
80 memset (haystack, 'A', m);
84 for (; repeat > 0; repeat--)
86 ASSERT (c_strcasestr (haystack, needle) == haystack + 1);
93 /* Check that a very long needle is discarded quickly if the haystack is
96 size_t repeat = 10000;
99 "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
100 "ABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABAB";
101 char *needle = (char *) malloc (m + 1);
104 memset (needle, 'A', m);
107 for (; repeat > 0; repeat--)
109 ASSERT (c_strcasestr (haystack, needle) == NULL);
116 /* Check that the asymptotic worst-case complexity is not quadratic. */
119 char *haystack = (char *) malloc (2 * m + 2);
120 char *needle = (char *) malloc (m + 2);
121 if (haystack != NULL && needle != NULL)
125 memset (haystack, 'A', 2 * m);
126 haystack[2 * m] = 'B';
127 haystack[2 * m + 1] = '\0';
129 memset (needle, 'a', m);
131 needle[m + 1] = '\0';
133 result = c_strcasestr (haystack, needle);
134 ASSERT (result == haystack + m);
138 if (haystack != NULL)