| /* Test strlen functions. |
| Copyright (C) 1999-2018 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 |
| #ifndef WIDE |
| # define TEST_NAME "strnlen" |
| #else |
| # define TEST_NAME "wcsnlen" |
| #endif /* !WIDE */ |
| #include "test-string.h" |
| |
| #ifndef WIDE |
| # define STRNLEN strnlen |
| # define CHAR char |
| # define BIG_CHAR CHAR_MAX |
| # define MIDDLE_CHAR 127 |
| # define SIMPLE_STRNLEN simple_strnlen |
| #else |
| # include <wchar.h> |
| # define STRNLEN wcsnlen |
| # define CHAR wchar_t |
| # define BIG_CHAR WCHAR_MAX |
| # define MIDDLE_CHAR 1121 |
| # define SIMPLE_STRNLEN simple_wcsnlen |
| #endif /* !WIDE */ |
| |
| typedef size_t (*proto_t) (const CHAR *, size_t); |
| size_t SIMPLE_STRNLEN (const CHAR *, size_t); |
| |
| IMPL (SIMPLE_STRNLEN, 0) |
| IMPL (STRNLEN, 1) |
| |
| size_t |
| SIMPLE_STRNLEN (const CHAR *s, size_t maxlen) |
| { |
| size_t i; |
| |
| for (i = 0; i < maxlen && s[i]; ++i); |
| return i; |
| } |
| |
| static void |
| do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len) |
| { |
| size_t len = CALL (impl, s, maxlen); |
| if (len != exp_len) |
| { |
| error (0, 0, "Wrong result in function %s %zd %zd", impl->name, |
| len, exp_len); |
| ret = 1; |
| return; |
| } |
| } |
| |
| static void |
| do_test (size_t align, size_t len, size_t maxlen, int max_char) |
| { |
| size_t i; |
| |
| align &= 63; |
| if ((align + len) * sizeof (CHAR) >= page_size) |
| return; |
| |
| CHAR *buf = (CHAR *) (buf1); |
| |
| for (i = 0; i < len; ++i) |
| buf[align + i] = 1 + 11111 * i % max_char; |
| buf[align + len] = 0; |
| |
| FOR_EACH_IMPL (impl, 0) |
| do_one_test (impl, (CHAR *) (buf + align), maxlen, MIN (len, maxlen)); |
| } |
| |
| static void |
| do_random_tests (void) |
| { |
| size_t i, j, n, align, len; |
| CHAR *p = (CHAR *) (buf1 + page_size - 512 * sizeof (CHAR)); |
| |
| for (n = 0; n < ITERATIONS; n++) |
| { |
| align = random () & 15; |
| len = random () & 511; |
| if (len + align > 510) |
| len = 511 - align - (random () & 7); |
| j = len + align + 64; |
| if (j > 512) |
| j = 512; |
| |
| for (i = 0; i < j; i++) |
| { |
| if (i == len + align) |
| p[i] = 0; |
| else |
| { |
| p[i] = random () & 255; |
| if (i >= align && i < len + align && !p[i]) |
| p[i] = (random () & 127) + 1; |
| } |
| } |
| |
| FOR_EACH_IMPL (impl, 1) |
| { |
| if (len > 0 |
| && CALL (impl, (CHAR *) (p + align), len - 1) != len - 1) |
| { |
| error (0, 0, "Iteration %zd (limited) - wrong result in function %s (%zd) %zd != %zd, p %p", |
| n, impl->name, align, |
| CALL (impl, (CHAR *) (p + align), len - 1), len - 1, p); |
| ret = 1; |
| } |
| if (CALL (impl, (CHAR *) (p + align), len) != len) |
| { |
| error (0, 0, "Iteration %zd (exact) - wrong result in function %s (%zd) %zd != %zd, p %p", |
| n, impl->name, align, |
| CALL (impl, (CHAR *) (p + align), len), len, p); |
| ret = 1; |
| } |
| if (CALL (impl, (CHAR *) (p + align), len + 1) != len) |
| { |
| error (0, 0, "Iteration %zd (long) - wrong result in function %s (%zd) %zd != %zd, p %p", |
| n, impl->name, align, |
| CALL (impl, (CHAR *) (p + align), len + 1), len, p); |
| ret = 1; |
| } |
| } |
| } |
| } |
| |
| /* Tests meant to unveil fail on implementation that does not access bytes |
| around the page boundary accordingly. */ |
| static void |
| do_page_tests (void) |
| { |
| size_t i, exp_len, start_offset, offset; |
| /* Calculate the null character offset. */ |
| size_t last_offset = (page_size / sizeof (CHAR)) - 1; |
| |
| CHAR *s = (CHAR *) buf2; |
| memset (s, 65, (last_offset - 1)); |
| s[last_offset] = 0; |
| |
| /* Place short strings ending at page boundary. */ |
| offset = last_offset; |
| for (i = 0; i < 128; i++) |
| { |
| /* Decrease offset to stress several sizes and alignments. */ |
| offset--; |
| exp_len = last_offset - offset; |
| FOR_EACH_IMPL (impl, 0) |
| { |
| /* Varies maxlen value to cover the cases where it is: |
| - larger than length; |
| - slightly greater than length; |
| - equal to length; |
| - slightly less than length. */ |
| do_one_test (impl, (CHAR *) (s + offset), page_size, exp_len); |
| do_one_test (impl, (CHAR *) (s + offset), exp_len + 1, exp_len); |
| do_one_test (impl, (CHAR *) (s + offset), exp_len, exp_len); |
| if (exp_len > 0) |
| do_one_test (impl, (CHAR *) (s + offset), exp_len - 1, exp_len - 1); |
| } |
| } |
| |
| /* Place long strings ending at page boundary. */ |
| start_offset = (last_offset + 1) / 2; |
| for (i = 0; i < 64; ++i) |
| { |
| /* Increase offset to stress several alignments. */ |
| offset = start_offset + i; |
| if (offset >= (last_offset + 1)) |
| break; |
| exp_len = last_offset - offset; |
| FOR_EACH_IMPL (impl, 0) |
| { |
| /* Checks only for maxlen much larger than length because smaller |
| values are already covered in do_random_tests function. */ |
| do_one_test (impl, (CHAR *) (s + offset), page_size, exp_len); |
| } |
| } |
| } |
| |
| int |
| test_main (void) |
| { |
| size_t i; |
| |
| test_init (); |
| |
| printf ("%20s", ""); |
| FOR_EACH_IMPL (impl, 0) |
| printf ("\t%s", impl->name); |
| putchar ('\n'); |
| |
| for (i = 1; i < 8; ++i) |
| { |
| do_test (0, i, i - 1, MIDDLE_CHAR); |
| do_test (0, i, i, MIDDLE_CHAR); |
| do_test (0, i, i + 1, MIDDLE_CHAR); |
| } |
| |
| for (i = 1; i < 8; ++i) |
| { |
| do_test (i, i, i - 1, MIDDLE_CHAR); |
| do_test (i, i, i, MIDDLE_CHAR); |
| do_test (i, i, i + 1, MIDDLE_CHAR); |
| } |
| |
| for (i = 2; i <= 10; ++i) |
| { |
| do_test (0, 1 << i, 5000, MIDDLE_CHAR); |
| do_test (1, 1 << i, 5000, MIDDLE_CHAR); |
| } |
| |
| for (i = 1; i < 8; ++i) |
| do_test (0, i, 5000, BIG_CHAR); |
| |
| for (i = 1; i < 8; ++i) |
| do_test (i, i, 5000, BIG_CHAR); |
| |
| for (i = 2; i <= 10; ++i) |
| { |
| do_test (0, 1 << i, 5000, BIG_CHAR); |
| do_test (1, 1 << i, 5000, BIG_CHAR); |
| } |
| |
| do_random_tests (); |
| do_page_tests (); |
| return ret; |
| } |
| |
| #include <support/test-driver.c> |