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Diffstat (limited to 'string/test-strnlen.c')
| -rw-r--r-- | string/test-strnlen.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/string/test-strnlen.c b/string/test-strnlen.c new file mode 100644 index 0000000000..cb8c80fe35 --- /dev/null +++ b/string/test-strnlen.c @@ -0,0 +1,197 @@ +/* Test and measure strlen functions. + Copyright (C) 1999, 2002, 2003, 2005, 2010 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#define TEST_MAIN +#include "test-string.h" + +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; + } + + if (HP_TIMING_AVAIL) + { + hp_timing_t start __attribute ((unused)); + hp_timing_t stop __attribute ((unused)); + hp_timing_t best_time = ~ (hp_timing_t) 0; + size_t i; + + for (i = 0; i < 32; ++i) + { + HP_TIMING_NOW (start); + CALL (impl, s, maxlen); + HP_TIMING_NOW (stop); + HP_TIMING_BEST (best_time, start, stop); + } + + printf ("\t%zd", (size_t) best_time); + } +} + +static void +do_test (size_t align, size_t len, size_t maxlen, int max_char) +{ + size_t i; + + align &= 7; + if (align + len >= page_size) + return; + + for (i = 0; i < len; ++i) + buf1[align + i] = 1 + 7 * i % max_char; + buf1[align + len] = 0; + + if (HP_TIMING_AVAIL) + printf ("Length %4zd, alignment %2zd:", len, align); + + FOR_EACH_IMPL (impl, 0) + do_one_test (impl, (char *) (buf1 + align), maxlen, MIN (len, maxlen)); + + if (HP_TIMING_AVAIL) + putchar ('\n'); +} + +static void +do_random_tests (void) +{ + size_t i, j, n, align, len; + unsigned char *p = buf1 + page_size - 512; + + 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; + } + } + } +} + +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, 127); + do_test (0, i, i, 127); + do_test (0, i, i + 1, 127); + } + + for (i = 1; i < 8; ++i) + { + do_test (i, i, i - 1, 127); + do_test (i, i, i, 127); + do_test (i, i, i + 1, 127); + } + + for (i = 2; i <= 10; ++i) + { + do_test (0, 1 << i, 5000, 127); + do_test (1, 1 << i, 5000, 127); + } + + for (i = 1; i < 8; ++i) + do_test (0, i, 5000, 255); + + for (i = 1; i < 8; ++i) + do_test (i, i, 5000, 255); + + for (i = 2; i <= 10; ++i) + { + do_test (0, 1 << i, 5000, 255); + do_test (1, 1 << i, 5000, 255); + } + + do_random_tests (); + return ret; +} + +#include "../test-skeleton.c" |