| /* Measure strncat functions. |
| Copyright (C) 2013-2018 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/>. */ |
| |
| #define TEST_MAIN |
| #ifndef WIDE |
| # define TEST_NAME "strncat" |
| #else |
| # define TEST_NAME "wcsncat" |
| #endif /* WIDE */ |
| #include "bench-string.h" |
| |
| #ifndef WIDE |
| # define STRNCAT strncat |
| # define CHAR char |
| # define SIMPLE_STRNCAT simple_strncat |
| # define STUPID_STRNCAT stupid_strncat |
| # define STRLEN strlen |
| # define MEMCMP memcmp |
| # define BIG_CHAR CHAR_MAX |
| # define SMALL_CHAR 127 |
| #else |
| # include <wchar.h> |
| # define STRNCAT wcsncat |
| # define CHAR wchar_t |
| # define SIMPLE_STRNCAT simple_wcsncat |
| # define STUPID_STRNCAT stupid_wcsncat |
| # define STRLEN wcslen |
| # define MEMCMP wmemcmp |
| # define BIG_CHAR WCHAR_MAX |
| # define SMALL_CHAR 1273 |
| #endif /* WIDE */ |
| |
| typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t); |
| CHAR *STUPID_STRNCAT (CHAR *, const CHAR *, size_t); |
| CHAR *SIMPLE_STRNCAT (CHAR *, const CHAR *, size_t); |
| |
| IMPL (STUPID_STRNCAT, 0) |
| IMPL (STRNCAT, 2) |
| |
| CHAR * |
| STUPID_STRNCAT (CHAR *dst, const CHAR *src, size_t n) |
| { |
| CHAR *ret = dst; |
| while (*dst++ != '\0'); |
| --dst; |
| while (n--) |
| if ((*dst++ = *src++) == '\0') |
| return ret; |
| *dst = '\0'; |
| return ret; |
| } |
| |
| static void |
| do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t n) |
| { |
| size_t k = STRLEN (dst), i, iters = INNER_LOOP_ITERS; |
| timing_t start, stop, cur; |
| |
| if (CALL (impl, dst, src, n) != dst) |
| { |
| error (0, 0, "Wrong result in function %s %p != %p", impl->name, |
| CALL (impl, dst, src, n), dst); |
| ret = 1; |
| return; |
| } |
| |
| size_t len = STRLEN (src); |
| if (MEMCMP (dst + k, src, len + 1 > n ? n : len + 1) != 0) |
| { |
| error (0, 0, "Incorrect concatenation in function %s", |
| impl->name); |
| ret = 1; |
| return; |
| } |
| if (n < len && dst[k + n] != '\0') |
| { |
| error (0, 0, "There is no zero in the end of output string in %s", |
| impl->name); |
| ret = 1; |
| return; |
| } |
| |
| TIMING_NOW (start); |
| for (i = 0; i < iters; ++i) |
| { |
| dst[k] = '\0'; |
| CALL (impl, dst, src, n); |
| } |
| TIMING_NOW (stop); |
| |
| TIMING_DIFF (cur, start, stop); |
| |
| TIMING_PRINT_MEAN ((double) cur, (double) iters); |
| } |
| |
| static void |
| do_test (size_t align1, size_t align2, size_t len1, size_t len2, |
| size_t n, int max_char) |
| { |
| size_t i; |
| CHAR *s1, *s2; |
| |
| align1 &= 7; |
| if ((align1 + len1) * sizeof (CHAR) >= page_size) |
| return; |
| if ((align1 + n) * sizeof (CHAR) > page_size) |
| return; |
| align2 &= 7; |
| if ((align2 + len1 + len2) * sizeof (CHAR) >= page_size) |
| return; |
| if ((align2 + len1 + n) * sizeof (CHAR) > page_size) |
| return; |
| s1 = (CHAR *) (buf1) + align1; |
| s2 = (CHAR *) (buf2) + align2; |
| |
| for (i = 0; i < len1; ++i) |
| s1[i] = 32 + 23 * i % (max_char - 32); |
| s1[len1] = '\0'; |
| |
| for (i = 0; i < len2; i++) |
| s2[i] = 32 + 23 * i % (max_char - 32); |
| |
| printf ("Length %4zd/%4zd, alignment %2zd/%2zd, N %4zd:", |
| len1, len2, align1, align2, n); |
| |
| FOR_EACH_IMPL (impl, 0) |
| { |
| s2[len2] = '\0'; |
| do_one_test (impl, s2, s1, n); |
| } |
| |
| putchar ('\n'); |
| } |
| |
| int |
| main (void) |
| { |
| size_t i, n; |
| |
| test_init (); |
| |
| printf ("%28s", ""); |
| FOR_EACH_IMPL (impl, 0) |
| printf ("\t%s", impl->name); |
| putchar ('\n'); |
| |
| for (n = 2; n <= 2048; n*=4) |
| { |
| do_test (0, 2, 2, 2, n, SMALL_CHAR); |
| do_test (0, 0, 4, 4, n, SMALL_CHAR); |
| do_test (4, 0, 4, 4, n, BIG_CHAR); |
| do_test (0, 0, 8, 8, n, SMALL_CHAR); |
| do_test (0, 8, 8, 8, n, SMALL_CHAR); |
| |
| for (i = 1; i < 8; ++i) |
| { |
| do_test (0, 0, 8 << i, 8 << i, n, SMALL_CHAR); |
| do_test (8 - i, 2 * i, 8 << i, 8 << i, n, SMALL_CHAR); |
| do_test (0, 0, 8 << i, 2 << i, n, SMALL_CHAR); |
| do_test (8 - i, 2 * i, 8 << i, 2 << i, n, SMALL_CHAR); |
| } |
| |
| for (i = 1; i < 8; ++i) |
| { |
| do_test (i, 2 * i, 8 << i, 1, n, SMALL_CHAR); |
| do_test (2 * i, i, 8 << i, 1, n, BIG_CHAR); |
| do_test (i, i, 8 << i, 10, n, SMALL_CHAR); |
| } |
| } |
| |
| return ret; |
| } |