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Diffstat (limited to 'benchtests/bench-strpbrk.c')
| -rw-r--r-- | benchtests/bench-strpbrk.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/benchtests/bench-strpbrk.c b/benchtests/bench-strpbrk.c new file mode 100644 index 0000000000..0163de89bc --- /dev/null +++ b/benchtests/bench-strpbrk.c @@ -0,0 +1,182 @@ +/* Measure strpbrk functions. + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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/>. */ + +#ifndef STRPBRK_RESULT +# define STRPBRK_RESULT(s, pos) ((s)[(pos)] ? (s) + (pos) : NULL) +# define RES_TYPE char * +# define TEST_MAIN +# define TEST_NAME "strpbrk" +# include "bench-string.h" + +typedef char *(*proto_t) (const char *, const char *); +char *simple_strpbrk (const char *, const char *); +char *stupid_strpbrk (const char *, const char *); + +IMPL (stupid_strpbrk, 0) +IMPL (simple_strpbrk, 0) +IMPL (strpbrk, 1) + +char * +simple_strpbrk (const char *s, const char *rej) +{ + const char *r; + char c; + + while ((c = *s++) != '\0') + for (r = rej; *r != '\0'; ++r) + if (*r == c) + return (char *) s - 1; + return NULL; +} + +char * +stupid_strpbrk (const char *s, const char *rej) +{ + size_t ns = strlen (s), nrej = strlen (rej); + size_t i, j; + + for (i = 0; i < ns; ++i) + for (j = 0; j < nrej; ++j) + if (s[i] == rej[j]) + return (char *) s + i; + return NULL; +} +#endif + +static void +do_one_test (impl_t *impl, const char *s, const char *rej, RES_TYPE exp_res) +{ + RES_TYPE res = CALL (impl, s, rej); + if (res != exp_res) + { + error (0, 0, "Wrong result in function %s %p %p", impl->name, + (void *) res, (void *) exp_res); + 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, rej); + 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 pos, size_t len) +{ + size_t i; + int c; + RES_TYPE result; + char *rej, *s; + + align &= 7; + if (align + pos + 10 >= page_size || len > 240) + return; + + rej = (char *) (buf2 + (random () & 255)); + s = (char *) (buf1 + align); + + for (i = 0; i < len; ++i) + { + rej[i] = random () & 255; + if (!rej[i]) + rej[i] = random () & 255; + if (!rej[i]) + rej[i] = 1 + (random () & 127); + } + rej[len] = '\0'; + for (c = 1; c <= 255; ++c) + if (strchr (rej, c) == NULL) + break; + + for (i = 0; i < pos; ++i) + { + s[i] = random () & 255; + if (strchr (rej, s[i])) + { + s[i] = random () & 255; + if (strchr (rej, s[i])) + s[i] = c; + } + } + s[pos] = rej[random () % (len + 1)]; + if (s[pos]) + { + for (i = pos + 1; i < pos + 10; ++i) + s[i] = random () & 255; + s[i] = '\0'; + } + result = STRPBRK_RESULT (s, pos); + + if (HP_TIMING_AVAIL) + printf ("Length %4zd, alignment %2zd, rej len %2zd:", pos, align, len); + + FOR_EACH_IMPL (impl, 0) + do_one_test (impl, s, rej, result); + + if (HP_TIMING_AVAIL) + putchar ('\n'); +} + +int +test_main (void) +{ + size_t i; + + test_init (); + + printf ("%32s", ""); + FOR_EACH_IMPL (impl, 0) + printf ("\t%s", impl->name); + putchar ('\n'); + + for (i = 0; i < 32; ++i) + { + do_test (0, 512, i); + do_test (i, 512, i); + } + + for (i = 1; i < 8; ++i) + { + do_test (0, 16 << i, 4); + do_test (i, 16 << i, 4); + } + + for (i = 1; i < 8; ++i) + do_test (i, 64, 10); + + for (i = 0; i < 64; ++i) + do_test (0, i, 6); + + return ret; +} + +#include "../test-skeleton.c" |