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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /string/test-strcmp.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.gz glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.xz glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.zip |
Prepare for radical source tree reorganization. zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
Diffstat (limited to 'string/test-strcmp.c')
-rw-r--r-- | string/test-strcmp.c | 409 |
1 files changed, 0 insertions, 409 deletions
diff --git a/string/test-strcmp.c b/string/test-strcmp.c deleted file mode 100644 index f7af219149..0000000000 --- a/string/test-strcmp.c +++ /dev/null @@ -1,409 +0,0 @@ -/* Test and measure strcmp and wcscmp 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. - Added wcscmp support by Liubov Dmitrieva <liubov.dmitrieva@gmail.com>, 2011. - - 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 "wcscmp" -#else -# define TEST_NAME "strcmp" -#endif -#include "test-string.h" - -#ifdef WIDE -# include <wchar.h> - -# define L(str) L##str -# define STRCMP wcscmp -# define STRCPY wcscpy -# define STRLEN wcslen -# define MEMCPY wmemcpy -# define SIMPLE_STRCMP simple_wcscmp -# define STUPID_STRCMP stupid_wcscmp -# define CHAR wchar_t -# define UCHAR wchar_t -# define CHARBYTES 4 -# define CHARBYTESLOG 2 -# define CHARALIGN __alignof__ (CHAR) -# define MIDCHAR 0x7fffffff -# define LARGECHAR 0xfffffffe -# define CHAR__MAX WCHAR_MAX -# define CHAR__MIN WCHAR_MIN - -/* Wcscmp uses signed semantics for comparison, not unsigned */ -/* Avoid using substraction since possible overflow */ - -int -simple_wcscmp (const wchar_t *s1, const wchar_t *s2) -{ - wchar_t c1, c2; - do - { - c1 = *s1++; - c2 = *s2++; - if (c2 == L'\0') - return c1 - c2; - } - while (c1 == c2); - - return c1 < c2 ? -1 : 1; -} - -int -stupid_wcscmp (const wchar_t *s1, const wchar_t *s2) -{ - size_t ns1 = wcslen (s1) + 1; - size_t ns2 = wcslen (s2) + 1; - size_t n = ns1 < ns2 ? ns1 : ns2; - int ret = 0; - - wchar_t c1, c2; - - while (n--) { - c1 = *s1++; - c2 = *s2++; - if ((ret = c1 < c2 ? -1 : c1 == c2 ? 0 : 1) != 0) - break; - } - return ret; -} - -#else -# include <limits.h> - -# define L(str) str -# define STRCMP strcmp -# define STRCPY strcpy -# define STRLEN strlen -# define MEMCPY memcpy -# define SIMPLE_STRCMP simple_strcmp -# define STUPID_STRCMP stupid_strcmp -# define CHAR char -# define UCHAR unsigned char -# define CHARBYTES 1 -# define CHARBYTESLOG 0 -# define CHARALIGN 1 -# define MIDCHAR 0x7f -# define LARGECHAR 0xfe -# define CHAR__MAX CHAR_MAX -# define CHAR__MIN CHAR_MIN - -/* Strcmp uses unsigned semantics for comparison. */ -int -simple_strcmp (const char *s1, const char *s2) -{ - int ret; - - while ((ret = *(unsigned char *) s1 - *(unsigned char*) s2++) == 0 && *s1++); - return ret; -} - -int -stupid_strcmp (const char *s1, const char *s2) -{ - size_t ns1 = strlen (s1) + 1; - size_t ns2 = strlen (s2) + 1; - size_t n = ns1 < ns2 ? ns1 : ns2; - int ret = 0; - - while (n--) - if ((ret = *(unsigned char *) s1++ - *(unsigned char *) s2++) != 0) - break; - return ret; -} -#endif - -typedef int (*proto_t) (const CHAR *, const CHAR *); - -IMPL (STUPID_STRCMP, 1) -IMPL (SIMPLE_STRCMP, 1) -IMPL (STRCMP, 1) - -static int -check_result (impl_t *impl, - const CHAR *s1, const CHAR *s2, - int exp_result) -{ - int result = CALL (impl, s1, s2); - 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, - int exp_result) -{ - if (check_result (impl, s1, s2, exp_result) < 0) - return; -} - -static void -do_test (size_t align1, size_t align2, size_t len, int max_char, - int exp_result) -{ - size_t i; - - CHAR *s1, *s2; - - if (len == 0) - return; - - align1 &= 63; - if (align1 + (len + 1) * CHARBYTES >= page_size) - return; - - align2 &= 63; - if (align2 + (len + 1) * CHARBYTES >= page_size) - return; - - /* Put them close to the end of page. */ - i = align1 + CHARBYTES * (len + 2); - s1 = (CHAR *) (buf1 + ((page_size - i) / 16 * 16) + align1); - i = align2 + CHARBYTES * (len + 2); - s2 = (CHAR *) (buf2 + ((page_size - i) / 16 * 16) + align2); - - for (i = 0; i < len; i++) - s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % max_char; - - s1[len] = s2[len] = 0; - s1[len + 1] = 23; - s2[len + 1] = 24 + exp_result; - s2[len - 1] -= exp_result; - - FOR_EACH_IMPL (impl, 0) - do_one_test (impl, s1, s2, exp_result); -} - -static void -do_random_tests (void) -{ - UCHAR *p1 = (UCHAR *) (buf1 + page_size - 512 * CHARBYTES); - UCHAR *p2 = (UCHAR *) (buf2 + page_size - 512 * CHARBYTES); - - for (size_t n = 0; n < ITERATIONS; n++) - { - /* for wcscmp case align1 and align2 mean here alignment - in wchar_t symbols, it equal 4*k alignment in bytes, we - don't check other alignments like for example - p1 = (wchar_t *)(buf1 + 1) - because it's wrong using of wchar_t type. */ - size_t align1 = random () & 31; - size_t align2; - if (random () & 1) - align2 = random () & 31; - else - align2 = align1 + (random () & 24); - size_t pos = random () & 511; - size_t j = align1 > align2 ? align1 : align2; - if (pos + j >= 511) - pos = 510 - j - (random () & 7); - size_t len1 = random () & 511; - if (pos >= len1 && (random () & 1)) - len1 = pos + (random () & 7); - if (len1 + j >= 512) - len1 = 511 - j - (random () & 7); - size_t len2; - 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 (size_t 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 (size_t 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); - } - } - - int 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 (p1[align1 + pos] < p2[align2 + pos]) - result = -1; - else - result = 1; - } - p1[len1 + align1] = 0; - p2[len2 + align2] = 0; - - FOR_EACH_IMPL (impl, 1) - { - int r = CALL (impl, (CHAR *) (p1 + align1), (CHAR *) (p2 + align2)); - /* 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 (align in bytes: %zd, align in bytes: %zd, len1: %zd, len2: %zd, pos: %zd) %d != %d, p1 %p p2 %p", - n, impl->name, (size_t) (p1 + align1) & 63, (size_t) (p1 + align2) & 63, len1, len2, pos, r, result, p1, p2); - ret = 1; - } - } - } -} - -static void -check (void) -{ - CHAR *s1 = (CHAR *) (buf1 + 0xb2c); - CHAR *s2 = (CHAR *) (buf1 + 0xfd8); - - STRCPY(s1, L("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrs")); - STRCPY(s2, L("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkLMNOPQRSTUV")); - - /* Check correct working for negatives values */ - - s1[0] = 1; - s2[0] = 1; - s1[1] = 1; - s2[1] = 1; - s1[2] = -1; - s2[2] = 3; - s1[3] = 0; - s2[3] = -1; - - /* Check possible overflow bug, actual more for wcscmp */ - - s1[7] = CHAR__MIN; - s2[7] = CHAR__MAX; - - size_t l1 = STRLEN (s1); - size_t l2 = STRLEN (s2); - - for (size_t i1 = 0; i1 < l1; i1++) - for (size_t i2 = 0; i2 < l2; i2++) - { - int exp_result = SIMPLE_STRCMP (s1 + i1, s2 + i2); - FOR_EACH_IMPL (impl, 0) - check_result (impl, s1 + i1, s2 + i2, exp_result); - } - - /* Test cases where there are multiple zero bytes after the first. */ - - for (size_t i = 0; i < 16 + 1; i++) - { - s1[i] = 0x00; - s2[i] = 0x00; - } - - for (size_t i = 0; i < 16; i++) - { - int exp_result; - - for (int val = 0x01; val < 0x100; val++) - { - for (size_t j = 0; j < i; j++) - { - s1[j] = val; - s2[j] = val; - } - - s2[i] = val; - - exp_result = SIMPLE_STRCMP (s1, s2); - FOR_EACH_IMPL (impl, 0) - check_result (impl, s1, s2, exp_result); - } - } -} - - -int -test_main (void) -{ - size_t i; - - test_init (); - check(); - - printf ("%23s", ""); - FOR_EACH_IMPL (impl, 0) - printf ("\t%s", impl->name); - putchar ('\n'); - - for (i = 1; i < 32; ++i) - { - do_test (CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 0); - do_test (CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 1); - do_test (CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, -1); - } - - for (i = 1; i < 10 + CHARBYTESLOG; ++i) - { - do_test (0, 0, 2 << i, MIDCHAR, 0); - do_test (0, 0, 2 << i, LARGECHAR, 0); - do_test (0, 0, 2 << i, MIDCHAR, 1); - do_test (0, 0, 2 << i, LARGECHAR, 1); - do_test (0, 0, 2 << i, MIDCHAR, -1); - do_test (0, 0, 2 << i, LARGECHAR, -1); - do_test (0, CHARBYTES * i, 2 << i, MIDCHAR, 1); - do_test (CHARBYTES * i, CHARBYTES * (i + 1), 2 << i, LARGECHAR, 1); - } - - for (i = 1; i < 8; ++i) - { - do_test (CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, 0); - do_test (2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, 0); - do_test (CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, 1); - do_test (2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, 1); - do_test (CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, -1); - do_test (2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, -1); - } - - do_random_tests (); - return ret; -} - -#include <support/test-driver.c> |