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Add performance tests for strstr and strcasestr.
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Ulrich Drepper
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Jul 24, 2010
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| /* Test and measure strcasestr functions. | ||
| Copyright (C) 2010 Free Software Foundation, Inc. | ||
| This file is part of the GNU C Library. | ||
| Written by Ulrich Drepper <drepper@redhat.com>, 2010. | ||
| 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. */ | ||
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| #define TEST_MAIN | ||
| #include "test-string.h" | ||
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| #define STRCASESTR simple_strcasestr | ||
| #define NO_ALIAS | ||
| #define __strncasecmp strncasecmp | ||
| #include "strcasestr.c" | ||
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| static char * | ||
| stupid_strcasestr (const char *s1, const char *s2) | ||
| { | ||
| ssize_t s1len = strlen (s1); | ||
| ssize_t s2len = strlen (s2); | ||
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| if (s2len > s1len) | ||
| return NULL; | ||
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| for (ssize_t i = 0; i <= s1len - s2len; ++i) | ||
| { | ||
| size_t j; | ||
| for (j = 0; j < s2len; ++j) | ||
| if (tolower (s1[i + j]) != tolower (s2[j])) | ||
| break; | ||
| if (j == s2len) | ||
| return (char *) s1 + i; | ||
| } | ||
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| return NULL; | ||
| } | ||
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| typedef char *(*proto_t) (const char *, const char *); | ||
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| IMPL (stupid_strcasestr, 0) | ||
| IMPL (simple_strcasestr, 0) | ||
| IMPL (strcasestr, 1) | ||
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| static void | ||
| do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result) | ||
| { | ||
| char *result = CALL (impl, s1, s2); | ||
| if (result != exp_result) | ||
| { | ||
| error (0, 0, "Wrong result in function %s %s %s", impl->name, | ||
| result, exp_result); | ||
| ret = 1; | ||
| return; | ||
| } | ||
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| 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; | ||
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| for (i = 0; i < 32; ++i) | ||
| { | ||
| HP_TIMING_NOW (start); | ||
| CALL (impl, s1, s2); | ||
| HP_TIMING_NOW (stop); | ||
| HP_TIMING_BEST (best_time, start, stop); | ||
| } | ||
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| printf ("\t%zd", (size_t) best_time); | ||
| } | ||
| } | ||
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| static void | ||
| do_test (size_t align1, size_t align2, size_t len1, size_t len2, | ||
| int fail) | ||
| { | ||
| char *s1 = (char *) (buf1 + align1); | ||
| char *s2 = (char *) (buf2 + align2); | ||
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| static const char d[] = "1234567890abcdef"; | ||
| #define dl (sizeof (d) - 1) | ||
| char *ss2 = s2; | ||
| for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0) | ||
| { | ||
| size_t t = l > dl ? dl : l; | ||
| ss2 = mempcpy (ss2, d, t); | ||
| } | ||
| s2[len2] = '\0'; | ||
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| if (fail) | ||
| { | ||
| char *ss1 = s1; | ||
| for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0) | ||
| { | ||
| size_t t = l > dl ? dl : l; | ||
| memcpy (ss1, d, t); | ||
| ++ss1[len2 > 7 ? 7 : len2 - 1]; | ||
| ss1 += t; | ||
| } | ||
| } | ||
| else | ||
| { | ||
| memset (s1, '0', len1); | ||
| for (size_t i = 0; i < len2; ++i) | ||
| s1[len1 - len2 + i] = toupper (s2[i]); | ||
| } | ||
| s1[len1] = '\0'; | ||
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| if (HP_TIMING_AVAIL) | ||
| printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:", | ||
| len1, len2, align1, align2, fail ? "fail" : "found"); | ||
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| FOR_EACH_IMPL (impl, 0) | ||
| do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2); | ||
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| if (HP_TIMING_AVAIL) | ||
| putchar ('\n'); | ||
| } | ||
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| static int | ||
| test_main (void) | ||
| { | ||
| test_init (); | ||
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| printf ("%23s", ""); | ||
| FOR_EACH_IMPL (impl, 0) | ||
| printf ("\t%s", impl->name); | ||
| putchar ('\n'); | ||
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| for (size_t klen = 2; klen < 32; ++klen) | ||
| for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen) | ||
| { | ||
| do_test (0, 0, hlen, klen, 0); | ||
| do_test (0, 0, hlen, klen, 1); | ||
| do_test (0, 3, hlen, klen, 0); | ||
| do_test (0, 3, hlen, klen, 1); | ||
| do_test (0, 9, hlen, klen, 0); | ||
| do_test (0, 9, hlen, klen, 1); | ||
| do_test (0, 15, hlen, klen, 0); | ||
| do_test (0, 15, hlen, klen, 1); | ||
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| do_test (3, 0, hlen, klen, 0); | ||
| do_test (3, 0, hlen, klen, 1); | ||
| do_test (3, 3, hlen, klen, 0); | ||
| do_test (3, 3, hlen, klen, 1); | ||
| do_test (3, 9, hlen, klen, 0); | ||
| do_test (3, 9, hlen, klen, 1); | ||
| do_test (3, 15, hlen, klen, 0); | ||
| do_test (3, 15, hlen, klen, 1); | ||
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| do_test (9, 0, hlen, klen, 0); | ||
| do_test (9, 0, hlen, klen, 1); | ||
| do_test (9, 3, hlen, klen, 0); | ||
| do_test (9, 3, hlen, klen, 1); | ||
| do_test (9, 9, hlen, klen, 0); | ||
| do_test (9, 9, hlen, klen, 1); | ||
| do_test (9, 15, hlen, klen, 0); | ||
| do_test (9, 15, hlen, klen, 1); | ||
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| do_test (15, 0, hlen, klen, 0); | ||
| do_test (15, 0, hlen, klen, 1); | ||
| do_test (15, 3, hlen, klen, 0); | ||
| do_test (15, 3, hlen, klen, 1); | ||
| do_test (15, 9, hlen, klen, 0); | ||
| do_test (15, 9, hlen, klen, 1); | ||
| do_test (15, 15, hlen, klen, 0); | ||
| do_test (15, 15, hlen, klen, 1); | ||
| } | ||
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| do_test (0, 0, page_size - 1, 16, 0); | ||
| do_test (0, 0, page_size - 1, 16, 1); | ||
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| return ret; | ||
| } | ||
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| #include "../test-skeleton.c" |
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