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Diffstat (limited to 'REORG.TODO/string/test-strnlen.c')
| -rw-r--r-- | REORG.TODO/string/test-strnlen.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/REORG.TODO/string/test-strnlen.c b/REORG.TODO/string/test-strnlen.c new file mode 100644 index 0000000000..e56cdb6708 --- /dev/null +++ b/REORG.TODO/string/test-strnlen.c @@ -0,0 +1,248 @@ +/* Test strlen 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 +#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> |