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Diffstat (limited to 'string/tst-cmp.c')
| -rw-r--r-- | string/tst-cmp.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/string/tst-cmp.c b/string/tst-cmp.c deleted file mode 100644 index d7720194e9..0000000000 --- a/string/tst-cmp.c +++ /dev/null @@ -1,212 +0,0 @@ -/* Alignment/padding coverage test for string comparison. - Copyright (C) 2016-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -/* This performs test comparisons with various (mis)alignments and - characters in the padding. It is partly a regression test for bug - 20327. */ - -#include <limits.h> -#include <malloc.h> -#include <stdbool.h> -#include <stdint.h> -#include <stdlib.h> -#include <string.h> - -static int -signum (int val) -{ - if (val < 0) - return -1; - if (val > 0) - return 1; - else - return 0; -} - -static size_t -max_size_t (size_t left, size_t right) -{ - if (left > right) - return left; - else - return right; -} - -/* Wrappers for strncmp and strncasecmp which determine the maximum - string length in some, either based on the input string length, or - using fixed constants. */ - -static int -strncmp_no_terminator (const char *left, const char *right) -{ - size_t left_len = strlen (left); - size_t right_len = strlen (right); - return strncmp (left, right, max_size_t (left_len, right_len)); -} - -static int -strncasecmp_no_terminator (const char *left, const char *right) -{ - size_t left_len = strlen (left); - size_t right_len = strlen (right); - return strncasecmp (left, right, max_size_t (left_len, right_len)); -} - -static int -strncmp_terminator (const char *left, const char *right) -{ - size_t left_len = strlen (left); - size_t right_len = strlen (right); - return strncmp (left, right, max_size_t (left_len, right_len)); -} - -static int -strncasecmp_terminator (const char *left, const char *right) -{ - size_t left_len = strlen (left); - size_t right_len = strlen (right); - return strncasecmp (left, right, max_size_t (left_len, right_len)); -} - -static int -strncmp_64 (const char *left, const char *right) -{ - return strncmp (left, right, 64); -} - -static int -strncasecmp_64 (const char *left, const char *right) -{ - return strncasecmp (left, right, 64); -} - -static int -strncmp_max (const char *left, const char *right) -{ - return strncmp (left, right, SIZE_MAX); -} - -static int -strncasecmp_max (const char *left, const char *right) -{ - return strncasecmp (left, right, SIZE_MAX); -} - -int -do_test (void) -{ - enum { - max_align = 64, - max_string_length = 33 - }; - size_t blob_size = max_align + max_string_length + 1; - char *left = memalign (max_align, blob_size); - char *right = memalign (max_align, blob_size); - if (left == NULL || right == NULL) - { - printf ("error: out of memory\n"); - return 1; - } - - const struct - { - const char *name; - int (*implementation) (const char *, const char *); - } functions[] = - { - { "strcmp", strcmp }, - { "strcasecmp", strcasecmp }, - { "strncmp (without NUL)", strncmp_no_terminator}, - { "strncasecmp (without NUL)", strncasecmp_no_terminator}, - { "strncmp (with NUL)", strncmp_terminator}, - { "strncasecmp (with NUL)", strncasecmp_terminator}, - { "strncmp (length 64)", strncmp_64}, - { "strncasecmp (length 64)", strncasecmp_64}, - { "strncmp (length SIZE_MAX)", strncmp_max}, - { "strncasecmp (length SIZE_MAX)", strncasecmp_max}, - { NULL, NULL } - }; - const char *const strings[] = - { - "", - "0", - "01", - "01234567", - "0123456789abcde", - "0123456789abcdef", - "0123456789abcdefg", - "1", - "10", - "123456789abcdef", - "123456789abcdefg", - "23456789abcdef", - "23456789abcdefg", - "abcdefghijklmnopqrstuvwxyzABCDEF", - NULL - }; - const unsigned char pads[] = - { 0, 1, 32, 64, 128, '0', '1', 'e', 'f', 'g', 127, 192, 255 }; - - bool errors = false; - for (int left_idx = 0; strings[left_idx] != NULL; ++left_idx) - for (int left_align = 0; left_align < max_align; ++left_align) - for (unsigned pad_left = 0; pad_left < sizeof (pads); ++pad_left) - { - memset (left, pads[pad_left], blob_size); - strcpy (left + left_align, strings[left_idx]); - - for (int right_idx = 0; strings[right_idx] != NULL; ++right_idx) - for (unsigned pad_right = 0; pad_right < sizeof (pads); - ++pad_right) - for (int right_align = 0; right_align < max_align; - ++right_align) - { - memset (right, pads[pad_right], blob_size); - strcpy (right + right_align, strings[right_idx]); - - for (int func = 0; functions[func].name != NULL; ++func) - { - int expected = left_idx - right_idx; - int actual = functions[func].implementation - (left + left_align, right + right_align); - if (signum (actual) != signum (expected)) - { - printf ("error: mismatch for %s: %d\n" - " left: \"%s\"\n" - " right: \"%s\"\n" - " pad_left = %u, pad_right = %u,\n" - " left_align = %d, right_align = %d\n", - functions[func].name, actual, - strings[left_idx], strings[right_idx], - pad_left, pad_right, - left_align, right_align); - errors = true; - } - } - } - } - free (right); - free (left); - return errors; -} - -/* The nested loops need a long time to complete on slower - machines. */ -#define TIMEOUT 300 - -#include <support/test-driver.c> |