Mercurial > gnulib

annotate tests/test-memmem.c @ 40246:c34f677e6117 default tip master

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
_Noreturn: GCC 4.7 does not support [[noreturn]] in C++11 mode * lib/_Noreturn.h, m4/gnulib-common.m4: Don't use [[noreturn]] before GCC 4.8.
author Akim Demaille <akim.demaille@gmail.com>
date Sun, 17 Mar 2019 19:27:20 +0100
parents 452ab00796c7
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
1 /*
40057
b06060465f09 maint: Run 'make update-copyright'
Paul Eggert <eggert@cs.ucla.edu>
parents: 39838
diff changeset
2 * Copyright (C) 2004, 2007-2019 Free Software Foundation, Inc.
9542
3453517c439c Use standard idioms.
Bruno Haible <bruno@clisp.org>
parents: 9538
diff changeset
3 * Written by Bruno Haible and Eric Blake
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
4 *
9309
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
Bruno Haible <bruno@clisp.org>
parents: 8891
diff changeset
5 * This program is free software: you can redistribute it and/or modify
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
6 * it under the terms of the GNU General Public License as published by
9309
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
Bruno Haible <bruno@clisp.org>
parents: 8891
diff changeset
7 * the Free Software Foundation; either version 3 of the License, or
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
Bruno Haible <bruno@clisp.org>
parents: 8891
diff changeset
8 * (at your option) any later version.
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
9 *
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
10 * This program is distributed in the hope that it will be useful,
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
13 * GNU General Public License for more details.
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
14 *
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License
19190
9759915b2aca all: prefer https: URLs
Paul Eggert <eggert@cs.ucla.edu>
parents: 18717
diff changeset
16 * along with this program. If not, see <https://www.gnu.org/licenses/>. */
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
17
8891
633babea5f62 Unconditionally include <config.h> in unit tests.
Eric Blake <ebb9@byu.net>
parents: 7944
diff changeset
18 #include <config.h>
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
19
9542
3453517c439c Use standard idioms.
Bruno Haible <bruno@clisp.org>
parents: 9538
diff changeset
20 #include <string.h>
3453517c439c Use standard idioms.
Bruno Haible <bruno@clisp.org>
parents: 9538
diff changeset
21
12489
33ab12a7cea2 tests: add signature checks
Eric Blake <ebb9@byu.net>
parents: 12422
diff changeset
22 #include "signature.h"
33ab12a7cea2 tests: add signature checks
Eric Blake <ebb9@byu.net>
parents: 12422
diff changeset
23 SIGNATURE_CHECK (memmem, void *, (void const *, size_t, void const *, size_t));
33ab12a7cea2 tests: add signature checks
Eric Blake <ebb9@byu.net>
parents: 12422
diff changeset
24
10195
cc40656bc64e Add missing include.
Eric Blake <ebb9@byu.net>
parents: 10192
diff changeset
25 #include <signal.h>
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
26 #include <stdlib.h>
9569
c5dc234b375e Shorten duration of memmem test.
Eric Blake <ebb9@byu.net>
parents: 9542
diff changeset
27 #include <unistd.h>
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
28
11570
1e84e9b3384a Make some tests ISO C 99 compliant.
Bruno Haible <bruno@clisp.org>
parents: 10195
diff changeset
29 #include "zerosize-ptr.h"
12496
a48d3d749ca5 Refactor common macros used in tests.
Bruno Haible <bruno@clisp.org>
parents: 12489
diff changeset
30 #include "macros.h"
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
31
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
32 int
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
33 main (int argc, char *argv[])
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
34 {
9571
72670d754431 Fix memmem test for mingw.
Eric Blake <ebb9@byu.net>
parents: 9569
diff changeset
35 #if HAVE_DECL_ALARM
9569
c5dc234b375e Shorten duration of memmem test.
Eric Blake <ebb9@byu.net>
parents: 9542
diff changeset
36 /* Declare failure if test takes too long, by using default abort
9571
72670d754431 Fix memmem test for mingw.
Eric Blake <ebb9@byu.net>
parents: 9569
diff changeset
37 caused by SIGALRM. All known platforms that lack alarm also lack
72670d754431 Fix memmem test for mingw.
Eric Blake <ebb9@byu.net>
parents: 9569
diff changeset
38 memmem, and the replacement memmem is known to not take too
72670d754431 Fix memmem test for mingw.
Eric Blake <ebb9@byu.net>
parents: 9569
diff changeset
39 long. */
17356
639f60219717 tests: make it easier to bypass alarm time in debugger
Eric Blake <eblake@redhat.com>
parents: 17249
diff changeset
40 int alarm_value = 100;
10192
0553e4d56bcc Work around environments that (stupidly) ignore SIGALRM.
Bruno Haible <bruno@clisp.org>
parents: 9889
diff changeset
41 signal (SIGALRM, SIG_DFL);
17356
639f60219717 tests: make it easier to bypass alarm time in debugger
Eric Blake <eblake@redhat.com>
parents: 17249
diff changeset
42 alarm (alarm_value);
9571
72670d754431 Fix memmem test for mingw.
Eric Blake <ebb9@byu.net>
parents: 9569
diff changeset
43 #endif
72670d754431 Fix memmem test for mingw.
Eric Blake <ebb9@byu.net>
parents: 9569
diff changeset
44
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
45 {
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
46 const char input[] = "foo";
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
47 const char *result = memmem (input, strlen (input), "", 0);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
48 ASSERT (result == input);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
49 }
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
50
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
51 {
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
52 const char input[] = "foo";
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
53 const char *result = memmem (input, strlen (input), "o", 1);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
54 ASSERT (result == input + 1);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
55 }
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
56
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
57 {
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
58 const char input[] = "ABC ABCDAB ABCDABCDABDE";
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
59 const char *result = memmem (input, strlen (input), "ABCDABD", 7);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
60 ASSERT (result == input + 15);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
61 }
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
62
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
63 {
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
64 const char input[] = "ABC ABCDAB ABCDABCDABDE";
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
65 const char *result = memmem (input, strlen (input), "ABCDABE", 7);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
66 ASSERT (result == NULL);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
67 }
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
68
9584
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
69 {
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
70 const char input[] = "ABC ABCDAB ABCDABCDABDE";
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
71 const char *result = memmem (input, strlen (input), "ABCDABCD", 8);
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
72 ASSERT (result == input + 11);
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
73 }
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
74
11570
1e84e9b3384a Make some tests ISO C 99 compliant.
Bruno Haible <bruno@clisp.org>
parents: 10195
diff changeset
75 /* Check that length 0 does not dereference the pointer. */
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
76 {
11570
1e84e9b3384a Make some tests ISO C 99 compliant.
Bruno Haible <bruno@clisp.org>
parents: 10195
diff changeset
77 const char *result = memmem (zerosize_ptr (), 0, "foo", 3);
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
78 ASSERT (result == NULL);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
79 }
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
80
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
81 {
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
82 const char input[] = "foo";
40214
452ab00796c7 Fix undefined behaviour.
Bruno Haible <bruno@clisp.org>
parents: 40057
diff changeset
83 const char *result = memmem (input, strlen (input), zerosize_ptr (), 0);
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
84 ASSERT (result == input);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
85 }
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
86
13772
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
87 /* Check that a long periodic needle does not cause false positives. */
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
88 {
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
89 const char input[] = ("F_BD_CE_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD"
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
90 "_C3_88_20_EF_BF_BD_EF_BF_BD_EF_BF_BD"
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
91 "_C3_A7_20_EF_BF_BD");
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
92 const char need[] = "_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD";
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
93 const char *result = memmem (input, strlen (input), need, strlen (need));
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
94 ASSERT (result == NULL);
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
95 }
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
96 {
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
97 const char input[] = ("F_BD_CE_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD"
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
98 "_C3_88_20_EF_BF_BD_EF_BF_BD_EF_BF_BD"
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
99 "_C3_A7_20_EF_BF_BD_DA_B5_C2_A6_20"
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
100 "_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD");
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
101 const char need[] = "_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD";
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
102 const char *result = memmem (input, strlen (input), need, strlen (need));
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
103 ASSERT (result == input + 115);
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
104 }
1d8a613275c6 memmem, strstr, strcasestr: fix bug with long periodic needle
Eric Blake <eblake@redhat.com>
parents: 13415
diff changeset
105
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
106 /* Check that a very long haystack is handled quickly if the needle is
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
107 short and occurs near the beginning. */
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
108 {
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
109 size_t repeat = 10000;
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
110 size_t m = 1000000;
13415
a884db63982b Avoid some more warnings from "gcc -Wwrite-strings".
Bruno Haible <bruno@clisp.org>
parents: 12825
diff changeset
111 const char *needle =
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
112 "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
113 "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
114 size_t n = strlen (needle);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
115 char *haystack = (char *) malloc (m + 1);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
116 if (haystack != NULL)
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
117 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
118 memset (haystack, 'A', m);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
119 haystack[0] = 'B';
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
120
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
121 for (; repeat > 0; repeat--)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
122 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
123 ASSERT (memmem (haystack, m, needle, n) == haystack + 1);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
124 }
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
125
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
126 free (haystack);
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
127 }
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
128 }
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
129
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
130 /* Check that a very long needle is discarded quickly if the haystack is
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
131 short. */
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
132 {
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
133 size_t repeat = 10000;
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
134 size_t m = 1000000;
13415
a884db63982b Avoid some more warnings from "gcc -Wwrite-strings".
Bruno Haible <bruno@clisp.org>
parents: 12825
diff changeset
135 const char *haystack =
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
136 "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
137 "ABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABAB";
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
138 size_t n = strlen (haystack);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
139 char *needle = (char *) malloc (m + 1);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
140 if (needle != NULL)
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
141 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
142 memset (needle, 'A', m);
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
143
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
144 for (; repeat > 0; repeat--)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
145 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
146 ASSERT (memmem (haystack, n, needle, m) == NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
147 }
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
148
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
149 free (needle);
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
150 }
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
151 }
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
152
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
153 /* Check that the asymptotic worst-case complexity is not quadratic. */
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
154 {
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
155 size_t m = 1000000;
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
156 char *haystack = (char *) malloc (2 * m + 1);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
157 char *needle = (char *) malloc (m + 1);
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
158 if (haystack != NULL && needle != NULL)
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
159 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
160 const char *result;
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
161
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
162 memset (haystack, 'A', 2 * m);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
163 haystack[2 * m] = 'B';
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
164
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
165 memset (needle, 'A', m);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
166 needle[m] = 'B';
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
167
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
168 result = memmem (haystack, 2 * m + 1, needle, m + 1);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
169 ASSERT (result == haystack + m);
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
170 }
9749
daf5ba9fe2d9 Remove useless "if" tests before free. Deprecate "free" module.
Jim Meyering <meyering@redhat.com>
parents: 9608
diff changeset
171 free (needle);
daf5ba9fe2d9 Remove useless "if" tests before free. Deprecate "free" module.
Jim Meyering <meyering@redhat.com>
parents: 9608
diff changeset
172 free (haystack);
9538
43d9769bf4d0 Fix memmem to avoid O(n^2) worst-case complexity.
Eric Blake <ebb9@byu.net>
parents: 9309
diff changeset
173 }
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
174
9584
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
175 /* Check that long needles not present in a haystack can be handled
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
176 with sublinear speed. */
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
177 {
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
178 size_t repeat = 10000;
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
179 size_t m = 1000000;
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
180 size_t n = 1000;
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
181 char *haystack = (char *) malloc (m);
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
182 char *needle = (char *) malloc (n);
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
183 if (haystack != NULL && needle != NULL)
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
184 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
185 const char *result;
9584
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
186
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
187 memset (haystack, 'A', m);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
188 memset (needle, 'B', n);
9584
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
189
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
190 for (; repeat > 0; repeat--)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
191 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
192 result = memmem (haystack, m, needle, n);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
193 ASSERT (result == NULL);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11570
diff changeset
194 }
9584
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
195 }
9749
daf5ba9fe2d9 Remove useless "if" tests before free. Deprecate "free" module.
Jim Meyering <meyering@redhat.com>
parents: 9608
diff changeset
196 free (haystack);
daf5ba9fe2d9 Remove useless "if" tests before free. Deprecate "free" module.
Jim Meyering <meyering@redhat.com>
parents: 9608
diff changeset
197 free (needle);
9584
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
198 }
f490fd6e4955 Rewrite memmem to guarantee linear complexity without malloc.
Eric Blake <ebb9@byu.net>
parents: 9571
diff changeset
199
14395
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
200 {
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
201 /* Ensure that with a barely periodic "short" needle, memmem's
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
202 search does not mistakenly skip just past the match point.
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
203 This use of memmem would mistakenly return NULL before
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
204 gnulib v0.0-4927. */
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
205 const char *haystack =
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
206 "\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
207 "with_build_libsubdir\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
208 "with_local_prefix\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
209 "with_gxx_include_dir\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
210 "with_cpp_install_dir\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
211 "enable_generated_files_in_srcdir\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
212 "with_gnu_ld\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
213 "with_ld\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
214 "with_demangler_in_ld\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
215 "with_gnu_as\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
216 "with_as\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
217 "enable_largefile\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
218 "enable_werror_always\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
219 "enable_checking\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
220 "enable_coverage\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
221 "enable_gather_detailed_mem_stats\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
222 "enable_build_with_cxx\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
223 "with_stabs\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
224 "enable_multilib\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
225 "enable___cxa_atexit\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
226 "enable_decimal_float\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
227 "enable_fixed_point\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
228 "enable_threads\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
229 "enable_tls\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
230 "enable_objc_gc\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
231 "with_dwarf2\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
232 "enable_shared\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
233 "with_build_sysroot\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
234 "with_sysroot\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
235 "with_specs\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
236 "with_pkgversion\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
237 "with_bugurl\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
238 "enable_languages\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
239 "with_multilib_list\n";
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
240 const char *needle = "\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
241 "with_gnu_ld\n";
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
242 const char* p = memmem (haystack, strlen (haystack),
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
243 needle, strlen (needle));
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
244 ASSERT (p - haystack == 114);
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
245 }
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
246
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
247 {
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
248 /* Same bug, shorter trigger. */
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
249 const char *haystack = "..wi.d.";
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
250 const char *needle = ".d.";
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
251 const char* p = memmem (haystack, strlen (haystack),
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
252 needle, strlen (needle));
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
253 ASSERT (p - haystack == 4);
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
254 }
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
255
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
256 {
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
257 /* Like the above, but trigger the flaw in two_way_long_needle
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
258 by using a needle of length LONG_NEEDLE_THRESHOLD (32) or greater.
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
259 Rather than trying to find the right alignment manually, I've
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
260 arbitrarily chosen the following needle and template for the
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
261 haystack, and ensure that for each placement of the needle in
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
262 that haystack, memmem finds it. */
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
263 const char *needle = "\nwith_gnu_ld-extend-to-len-32-b\n";
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
264 const char *h =
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
265 "\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
266 "with_build_libsubdir\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
267 "with_local_prefix\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
268 "with_gxx_include_dir\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
269 "with_cpp_install_dir\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
270 "with_e_\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
271 "..............................\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
272 "with_FGHIJKLMNOPQRSTUVWXYZ\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
273 "with_567890123456789\n"
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
274 "with_multilib_list\n";
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
275 size_t h_len = strlen (h);
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
276 char *haystack = malloc (h_len + 1);
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
277 size_t i;
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
278 ASSERT (haystack);
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
279 for (i = 0; i < h_len - strlen (needle); i++)
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
280 {
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
281 const char *p;
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
282 memcpy (haystack, h, h_len + 1);
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
283 memcpy (haystack + i, needle, strlen (needle) + 1);
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
284 p = memmem (haystack, strlen (haystack), needle, strlen (needle));
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
285 ASSERT (p);
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
286 ASSERT (p - haystack == i);
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
287 }
39836
7e5ce9b777a1 Apply Jim Meyering's fix from 2015-01-11 to more tests.
Bruno Haible <bruno@clisp.org>
parents: 19484
diff changeset
288 free (haystack);
14395
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
289 }
bf7bdef206dd strstr: expand test coverage
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
290
39838
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
291 /* Test long needles. */
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
292 {
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
293 size_t m = 1024;
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
294 char *haystack = (char *) malloc (2 * m + 1);
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
295 char *needle = (char *) malloc (m + 1);
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
296 if (haystack != NULL && needle != NULL)
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
297 {
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
298 const char *p;
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
299 haystack[0] = 'x';
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
300 memset (haystack + 1, ' ', m - 1);
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
301 memset (haystack + m, 'x', m);
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
302 haystack[2 * m] = '\0';
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
303 memset (needle, 'x', m);
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
304 needle[m] = '\0';
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
305 p = memmem (haystack, strlen (haystack), needle, strlen (needle));
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
306 ASSERT (p);
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
307 ASSERT (p - haystack == m);
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
308 }
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
309 free (needle);
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
310 free (haystack);
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
311 }
92143bff3a3f Add test case from a recent glibc bug.
Bruno Haible <bruno@clisp.org>
parents: 39836
diff changeset
312
5310
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
313 return 0;
26382eb5dbd2 New module 'memmem', from Simon Josefsson.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
314 }