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Diffstat (limited to 'string/test-strncmp.c')
-rw-r--r-- | string/test-strncmp.c | 479 |
1 files changed, 0 insertions, 479 deletions
diff --git a/string/test-strncmp.c b/string/test-strncmp.c deleted file mode 100644 index fe3c4e3320..0000000000 --- a/string/test-strncmp.c +++ /dev/null @@ -1,479 +0,0 @@ -/* Test strncmp and wcsncmp functions. - Copyright (C) 1999-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Written by Jakub Jelinek <jakub@redhat.com>, 1999. - - 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/>. */ - -#define TEST_MAIN -#ifdef WIDE -# define TEST_NAME "wcsncmp" -#else -# define TEST_NAME "strncmp" -#endif -#include "test-string.h" - -#ifdef WIDE -# include <wchar.h> - -# define L(str) L##str -# define STRNCMP wcsncmp -# define STRCPY wcscpy -# define STRDUP wcsdup -# define MEMCPY wmemcpy -# define SIMPLE_STRNCMP simple_wcsncmp -# define STUPID_STRNCMP stupid_wcsncmp -# define CHAR wchar_t -# define UCHAR wchar_t -# define CHARBYTES 4 -# define CHAR__MAX WCHAR_MAX -# define CHAR__MIN WCHAR_MIN - -/* Wcsncmp uses signed semantics for comparison, not unsigned. - Avoid using substraction since possible overflow */ -int -simple_wcsncmp (const CHAR *s1, const CHAR *s2, size_t n) -{ - wchar_t c1, c2; - - while (n--) - { - c1 = *s1++; - c2 = *s2++; - if (c1 == L('\0') || c1 != c2) - return c1 > c2 ? 1 : (c1 < c2 ? -1 : 0); - } - return 0; -} - -int -stupid_wcsncmp (const CHAR *s1, const CHAR *s2, size_t n) -{ - wchar_t c1, c2; - size_t ns1 = wcsnlen (s1, n) + 1, ns2 = wcsnlen (s2, n) + 1; - - n = ns1 < n ? ns1 : n; - n = ns2 < n ? ns2 : n; - - while (n--) - { - c1 = *s1++; - c2 = *s2++; - if (c1 != c2) - return c1 > c2 ? 1 : -1; - } - return 0; -} - -#else -# define L(str) str -# define STRNCMP strncmp -# define STRCPY strcpy -# define STRDUP strdup -# define MEMCPY memcpy -# define SIMPLE_STRNCMP simple_strncmp -# define STUPID_STRNCMP stupid_strncmp -# define CHAR char -# define UCHAR unsigned char -# define CHARBYTES 1 -# define CHAR__MAX CHAR_MAX -# define CHAR__MIN CHAR_MIN - -/* Strncmp uses unsigned semantics for comparison. */ -int -simple_strncmp (const char *s1, const char *s2, size_t n) -{ - int ret = 0; - - while (n-- && (ret = *(unsigned char *) s1 - * (unsigned char *) s2++) == 0 - && *s1++); - return ret; -} - -int -stupid_strncmp (const char *s1, const char *s2, size_t n) -{ - size_t ns1 = strnlen (s1, n) + 1, ns2 = strnlen (s2, n) + 1; - int ret = 0; - - n = ns1 < n ? ns1 : n; - n = ns2 < n ? ns2 : n; - while (n-- && (ret = *(unsigned char *) s1++ - * (unsigned char *) s2++) == 0); - return ret; -} - -#endif - -typedef int (*proto_t) (const CHAR *, const CHAR *, size_t); - -IMPL (STUPID_STRNCMP, 0) -IMPL (SIMPLE_STRNCMP, 0) -IMPL (STRNCMP, 1) - - -static int -check_result (impl_t *impl, const CHAR *s1, const CHAR *s2, size_t n, - int exp_result) -{ - int result = CALL (impl, s1, s2, n); - if ((exp_result == 0 && result != 0) - || (exp_result < 0 && result >= 0) - || (exp_result > 0 && result <= 0)) - { - error (0, 0, "Wrong result in function %s %d %d", impl->name, - result, exp_result); - ret = 1; - return -1; - } - - return 0; -} - -static void -do_one_test (impl_t *impl, const CHAR *s1, const CHAR *s2, size_t n, - int exp_result) -{ - if (check_result (impl, s1, s2, n, exp_result) < 0) - return; -} - -static void -do_test_limit (size_t align1, size_t align2, size_t len, size_t n, int max_char, - int exp_result) -{ - size_t i, align_n; - CHAR *s1, *s2; - - align1 &= ~(CHARBYTES - 1); - align2 &= ~(CHARBYTES - 1); - - if (n == 0) - { - s1 = (CHAR *) (buf1 + page_size); - s2 = (CHAR *) (buf2 + page_size); - - FOR_EACH_IMPL (impl, 0) - do_one_test (impl, s1, s2, n, 0); - - return; - } - - align1 &= 15; - align2 &= 15; - align_n = (page_size - n * CHARBYTES) & 15; - - s1 = (CHAR *) (buf1 + page_size - n * CHARBYTES); - s2 = (CHAR *) (buf2 + page_size - n * CHARBYTES); - - if (align1 < align_n) - s1 = (CHAR *) ((char *) s1 - (align_n - align1)); - - if (align2 < align_n) - s2 = (CHAR *) ((char *) s2 - (align_n - align2)); - - for (i = 0; i < n; i++) - s1[i] = s2[i] = 1 + 23 * i % max_char; - - if (len < n) - { - s1[len] = 0; - s2[len] = 0; - if (exp_result < 0) - s2[len] = 32; - else if (exp_result > 0) - s1[len] = 64; - } - - FOR_EACH_IMPL (impl, 0) - do_one_test (impl, s1, s2, n, exp_result); -} - -static void -do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char, - int exp_result) -{ - size_t i; - CHAR *s1, *s2; - - align1 &= ~(CHARBYTES - 1); - align2 &= ~(CHARBYTES - 1); - - if (n == 0) - return; - - align1 &= 63; - if (align1 + (n + 1) * CHARBYTES >= page_size) - return; - - align2 &= 63; - if (align2 + (n + 1) * CHARBYTES >= page_size) - return; - - s1 = (CHAR *) (buf1 + align1); - s2 = (CHAR *) (buf2 + align2); - - for (i = 0; i < n; i++) - s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % max_char; - - s1[n] = 24 + exp_result; - s2[n] = 23; - s1[len] = 0; - s2[len] = 0; - if (exp_result < 0) - s2[len] = 32; - else if (exp_result > 0) - s1[len] = 64; - if (len >= n) - s2[n - 1] -= exp_result; - - FOR_EACH_IMPL (impl, 0) - do_one_test (impl, s1, s2, n, exp_result); -} - -static void -do_page_test (size_t offset1, size_t offset2, CHAR *s2) -{ - CHAR *s1; - int exp_result; - - if (offset1 * CHARBYTES >= page_size || offset2 * CHARBYTES >= page_size) - return; - - s1 = (CHAR *) buf1; - s1 += offset1; - s2 += offset2; - - exp_result= *s1; - - FOR_EACH_IMPL (impl, 0) - { - check_result (impl, s1, s2, page_size, -exp_result); - check_result (impl, s2, s1, page_size, exp_result); - } -} - -static void -do_random_tests (void) -{ - size_t i, j, n, align1, align2, pos, len1, len2, size; - int result; - long r; - UCHAR *p1 = (UCHAR *) (buf1 + page_size - 512 * CHARBYTES); - UCHAR *p2 = (UCHAR *) (buf2 + page_size - 512 * CHARBYTES); - - for (n = 0; n < ITERATIONS; n++) - { - align1 = random () & 31; - if (random () & 1) - align2 = random () & 31; - else - align2 = align1 + (random () & 24); - pos = random () & 511; - size = random () & 511; - j = align1 > align2 ? align1 : align2; - if (pos + j >= 511) - pos = 510 - j - (random () & 7); - len1 = random () & 511; - if (pos >= len1 && (random () & 1)) - len1 = pos + (random () & 7); - if (len1 + j >= 512) - len1 = 511 - j - (random () & 7); - if (pos >= len1) - len2 = len1; - else - len2 = len1 + (len1 != 511 - j ? random () % (511 - j - len1) : 0); - j = (pos > len2 ? pos : len2) + align1 + 64; - if (j > 512) - j = 512; - for (i = 0; i < j; ++i) - { - p1[i] = random () & 255; - if (i < len1 + align1 && !p1[i]) - { - p1[i] = random () & 255; - if (!p1[i]) - p1[i] = 1 + (random () & 127); - } - } - for (i = 0; i < j; ++i) - { - p2[i] = random () & 255; - if (i < len2 + align2 && !p2[i]) - { - p2[i] = random () & 255; - if (!p2[i]) - p2[i] = 1 + (random () & 127); - } - } - - result = 0; - MEMCPY (p2 + align2, p1 + align1, pos); - if (pos < len1) - { - if (p2[align2 + pos] == p1[align1 + pos]) - { - p2[align2 + pos] = random () & 255; - if (p2[align2 + pos] == p1[align1 + pos]) - p2[align2 + pos] = p1[align1 + pos] + 3 + (random () & 127); - } - - if (pos < size) - { - if (p1[align1 + pos] < p2[align2 + pos]) - result = -1; - else - result = 1; - } - } - p1[len1 + align1] = 0; - p2[len2 + align2] = 0; - - FOR_EACH_IMPL (impl, 1) - { - r = CALL (impl, (CHAR *) (p1 + align1), (CHAR *) (p2 + align2), size); - /* Test whether on 64-bit architectures where ABI requires - callee to promote has the promotion been done. */ - asm ("" : "=g" (r) : "0" (r)); - if ((r == 0 && result) - || (r < 0 && result >= 0) - || (r > 0 && result <= 0)) - { - error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd, %zd, %zd) %ld != %d, p1 %p p2 %p", - n, impl->name, align1, align2, len1, len2, pos, size, r, result, p1, p2); - ret = 1; - } - } - } -} - -static void -check1 (void) -{ - CHAR *s1 = (CHAR *) (buf1 + 0xb2c); - CHAR *s2 = (CHAR *) (buf1 + 0xfd8); - size_t i, offset; - int exp_result; - - STRCPY(s1, L("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrs")); - STRCPY(s2, L("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkLMNOPQRSTUV")); - - /* Check possible overflow bug for wcsncmp */ - s1[4] = CHAR__MAX; - s2[4] = CHAR__MIN; - - for (offset = 0; offset < 6; offset++) - { - for (i = 0; i < 80; i++) - { - exp_result = SIMPLE_STRNCMP (s1 + offset, s2 + offset, i); - FOR_EACH_IMPL (impl, 0) - check_result (impl, s1 + offset, s2 + offset, i, exp_result); - } - } -} - -static void -check2 (void) -{ - size_t i; - CHAR *s1, *s2; - - s1 = (CHAR *) buf1; - for (i = 0; i < (page_size / CHARBYTES) - 1; i++) - s1[i] = 23; - s1[i] = 0; - - s2 = STRDUP (s1); - - for (i = 0; i < 64; ++i) - do_page_test ((3988 / CHARBYTES) + i, (2636 / CHARBYTES), s2); - - free (s2); -} - -int -test_main (void) -{ - size_t i; - - test_init (); - - check1 (); - check2 (); - - printf ("%23s", ""); - FOR_EACH_IMPL (impl, 0) - printf ("\t%s", impl->name); - putchar ('\n'); - - for (i =0; i < 16; ++i) - { - do_test (0, 0, 8, i, 127, 0); - do_test (0, 0, 8, i, 127, -1); - do_test (0, 0, 8, i, 127, 1); - do_test (i, i, 8, i, 127, 0); - do_test (i, i, 8, i, 127, 1); - do_test (i, i, 8, i, 127, -1); - do_test (i, 2 * i, 8, i, 127, 0); - do_test (2 * i, i, 8, i, 127, 1); - do_test (i, 3 * i, 8, i, 127, -1); - do_test (0, 0, 8, i, 255, 0); - do_test (0, 0, 8, i, 255, -1); - do_test (0, 0, 8, i, 255, 1); - do_test (i, i, 8, i, 255, 0); - do_test (i, i, 8, i, 255, 1); - do_test (i, i, 8, i, 255, -1); - do_test (i, 2 * i, 8, i, 255, 0); - do_test (2 * i, i, 8, i, 255, 1); - do_test (i, 3 * i, 8, i, 255, -1); - } - - for (i = 1; i < 8; ++i) - { - do_test (0, 0, 8 << i, 16 << i, 127, 0); - do_test (0, 0, 8 << i, 16 << i, 127, 1); - do_test (0, 0, 8 << i, 16 << i, 127, -1); - do_test (0, 0, 8 << i, 16 << i, 255, 0); - do_test (0, 0, 8 << i, 16 << i, 255, 1); - do_test (0, 0, 8 << i, 16 << i, 255, -1); - do_test (8 - i, 2 * i, 8 << i, 16 << i, 127, 0); - do_test (8 - i, 2 * i, 8 << i, 16 << i, 127, 1); - do_test (2 * i, i, 8 << i, 16 << i, 255, 0); - do_test (2 * i, i, 8 << i, 16 << i, 255, 1); - } - - do_test_limit (0, 0, 0, 0, 127, 0); - do_test_limit (4, 0, 21, 20, 127, 0); - do_test_limit (0, 4, 21, 20, 127, 0); - do_test_limit (8, 0, 25, 24, 127, 0); - do_test_limit (0, 8, 25, 24, 127, 0); - - for (i = 0; i < 8; ++i) - { - do_test_limit (0, 0, 17 - i, 16 - i, 127, 0); - do_test_limit (0, 0, 17 - i, 16 - i, 255, 0); - do_test_limit (0, 0, 15 - i, 16 - i, 127, 0); - do_test_limit (0, 0, 15 - i, 16 - i, 127, 1); - do_test_limit (0, 0, 15 - i, 16 - i, 127, -1); - do_test_limit (0, 0, 15 - i, 16 - i, 255, 0); - do_test_limit (0, 0, 15 - i, 16 - i, 255, 1); - do_test_limit (0, 0, 15 - i, 16 - i, 255, -1); - } - - do_random_tests (); - return ret; -} - -#include <support/test-driver.c> |