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Diffstat (limited to 'tests/test-strstr.c')
| -rw-r--r-- | tests/test-strstr.c | 279 |
1 files changed, 0 insertions, 279 deletions
diff --git a/tests/test-strstr.c b/tests/test-strstr.c deleted file mode 100644 index 70ebf50c..00000000 --- a/tests/test-strstr.c +++ /dev/null @@ -1,279 +0,0 @@ -/* - * Copyright (C) 2004, 2007-2015 Free Software Foundation, Inc. - * Written by Bruno Haible and Eric Blake - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. */ - -#include <config.h> - -#include <string.h> - -#include "signature.h" -SIGNATURE_CHECK (strstr, char *, (char const *, char const *)); - -#include <signal.h> -#include <stdlib.h> -#include <unistd.h> - -#include "zerosize-ptr.h" -#include "macros.h" - -int -main (int argc, char *argv[]) -{ -#if HAVE_DECL_ALARM - /* Declare failure if test takes too long, by using default abort - caused by SIGALRM. All known platforms that lack alarm also have - a quadratic strstr, and the replacement strstr is known to not - take too long. */ - int alarm_value = 50; - signal (SIGALRM, SIG_DFL); - alarm (alarm_value); -#endif - - { - const char input[] = "foo"; - const char *result = strstr (input, ""); - ASSERT (result == input); - } - - { - const char input[] = "foo"; - const char *result = strstr (input, "o"); - ASSERT (result == input + 1); - } - - { - /* On some platforms, the memchr() functions reads past the first - occurrence of the byte to be searched, leading to an out-of-bounds - read access for strstr(). - See <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=521737>. - This is a bug in memchr(), see the Austin Group's clarification - <http://www.opengroup.org/austin/docs/austin_454.txt>. */ - const char *fix = "aBaaaaaaaaaaax"; - char *page_boundary = (char *) zerosize_ptr (); - size_t len = strlen (fix) + 1; - char *input = page_boundary ? page_boundary - len : malloc (len); - const char *result; - - strcpy (input, fix); - result = strstr (input, "B1x"); - ASSERT (result == NULL); - if (!page_boundary) - free (input); - } - - { - const char input[] = "ABC ABCDAB ABCDABCDABDE"; - const char *result = strstr (input, "ABCDABD"); - ASSERT (result == input + 15); - } - - { - const char input[] = "ABC ABCDAB ABCDABCDABDE"; - const char *result = strstr (input, "ABCDABE"); - ASSERT (result == NULL); - } - - { - const char input[] = "ABC ABCDAB ABCDABCDABDE"; - const char *result = strstr (input, "ABCDABCD"); - ASSERT (result == input + 11); - } - - /* Check that a long periodic needle does not cause false positives. */ - { - const char input[] = "F_BD_CE_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD" - "_C3_88_20_EF_BF_BD_EF_BF_BD_EF_BF_BD" - "_C3_A7_20_EF_BF_BD"; - const char need[] = "_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD"; - const char *result = strstr (input, need); - ASSERT (result == NULL); - } - { - const char input[] = "F_BD_CE_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD" - "_C3_88_20_EF_BF_BD_EF_BF_BD_EF_BF_BD" - "_C3_A7_20_EF_BF_BD_DA_B5_C2_A6_20" - "_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD"; - const char need[] = "_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD"; - const char *result = strstr (input, need); - ASSERT (result == input + 115); - } - - /* Check that a very long haystack is handled quickly if the needle is - short and occurs near the beginning. */ - { - size_t repeat = 10000; - size_t m = 1000000; - const char *needle = - "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" - "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"; - char *haystack = (char *) malloc (m + 1); - if (haystack != NULL) - { - memset (haystack, 'A', m); - haystack[0] = 'B'; - haystack[m] = '\0'; - - for (; repeat > 0; repeat--) - { - ASSERT (strstr (haystack, needle) == haystack + 1); - } - - free (haystack); - } - } - - /* Check that a very long needle is discarded quickly if the haystack is - short. */ - { - size_t repeat = 10000; - size_t m = 1000000; - const char *haystack = - "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" - "ABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABABAB"; - char *needle = (char *) malloc (m + 1); - if (needle != NULL) - { - memset (needle, 'A', m); - needle[m] = '\0'; - - for (; repeat > 0; repeat--) - { - ASSERT (strstr (haystack, needle) == NULL); - } - - free (needle); - } - } - - /* Check that the asymptotic worst-case complexity is not quadratic. */ - { - size_t m = 1000000; - char *haystack = (char *) malloc (2 * m + 2); - char *needle = (char *) malloc (m + 2); - if (haystack != NULL && needle != NULL) - { - const char *result; - - memset (haystack, 'A', 2 * m); - haystack[2 * m] = 'B'; - haystack[2 * m + 1] = '\0'; - - memset (needle, 'A', m); - needle[m] = 'B'; - needle[m + 1] = '\0'; - - result = strstr (haystack, needle); - ASSERT (result == haystack + m); - } - free (needle); - free (haystack); - } - - /* Sublinear speed is only possible in memmem; strstr must examine - every character of haystack to find its length. */ - - - { - /* Ensure that with a barely periodic "short" needle, strstr's - search does not mistakenly skip just past the match point. - This use of strstr would mistakenly return NULL before - gnulib v0.0-4927. */ - const char *haystack = - "\n" - "with_build_libsubdir\n" - "with_local_prefix\n" - "with_gxx_include_dir\n" - "with_cpp_install_dir\n" - "enable_generated_files_in_srcdir\n" - "with_gnu_ld\n" - "with_ld\n" - "with_demangler_in_ld\n" - "with_gnu_as\n" - "with_as\n" - "enable_largefile\n" - "enable_werror_always\n" - "enable_checking\n" - "enable_coverage\n" - "enable_gather_detailed_mem_stats\n" - "enable_build_with_cxx\n" - "with_stabs\n" - "enable_multilib\n" - "enable___cxa_atexit\n" - "enable_decimal_float\n" - "enable_fixed_point\n" - "enable_threads\n" - "enable_tls\n" - "enable_objc_gc\n" - "with_dwarf2\n" - "enable_shared\n" - "with_build_sysroot\n" - "with_sysroot\n" - "with_specs\n" - "with_pkgversion\n" - "with_bugurl\n" - "enable_languages\n" - "with_multilib_list\n"; - const char *needle = "\n" - "with_gnu_ld\n"; - const char* p = strstr (haystack, needle); - ASSERT (p - haystack == 114); - } - - { - /* Same bug, shorter trigger. */ - const char *haystack = "..wi.d."; - const char *needle = ".d."; - const char* p = strstr (haystack, needle); - ASSERT (p - haystack == 4); - } - - { - /* Like the above, but trigger the flaw in two_way_long_needle - by using a needle of length LONG_NEEDLE_THRESHOLD (32) or greater. - Rather than trying to find the right alignment manually, I've - arbitrarily chosen the following needle and template for the - haystack, and ensure that for each placement of the needle in - that haystack, strstr finds it. */ - const char *needle = "\nwith_gnu_ld-extend-to-len-32-b\n"; - const char *h = - "\n" - "with_build_libsubdir\n" - "with_local_prefix\n" - "with_gxx_include_dir\n" - "with_cpp_install_dir\n" - "with_e_\n" - "..............................\n" - "with_FGHIJKLMNOPQRSTUVWXYZ\n" - "with_567890123456789\n" - "with_multilib_list\n"; - size_t h_len = strlen (h); - char *haystack = malloc (h_len + 1); - size_t i; - ASSERT (haystack); - for (i = 0; i < h_len - strlen (needle); i++) - { - const char *p; - memcpy (haystack, h, h_len + 1); - memcpy (haystack + i, needle, strlen (needle) + 1); - p = strstr (haystack, needle); - ASSERT (p); - ASSERT (p - haystack == i); - } - free (haystack); - } - - return 0; -} |