| /* Measure strncpy 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/>. */ |
| |
| #ifdef WIDE |
| # include <wchar.h> |
| # define CHAR wchar_t |
| # define UCHAR wchar_t |
| # define BIG_CHAR WCHAR_MAX |
| # define SMALL_CHAR 1273 |
| # define MEMCMP wmemcmp |
| # define MEMSET wmemset |
| # define STRNLEN wcsnlen |
| #else |
| # define CHAR char |
| # define UCHAR unsigned char |
| # define BIG_CHAR CHAR_MAX |
| # define SMALL_CHAR 127 |
| # define MEMCMP memcmp |
| # define MEMSET memset |
| # define STRNLEN strnlen |
| #endif /* !WIDE */ |
| |
| |
| #ifndef STRNCPY_RESULT |
| # define STRNCPY_RESULT(dst, len, n) dst |
| # define TEST_MAIN |
| # ifndef WIDE |
| # define TEST_NAME "strncpy" |
| # else |
| # define TEST_NAME "wcsncpy" |
| # endif /* WIDE */ |
| # include "bench-string.h" |
| # ifndef WIDE |
| # define SIMPLE_STRNCPY simple_strncpy |
| # define STUPID_STRNCPY stupid_strncpy |
| # define STRNCPY strncpy |
| # else |
| # define SIMPLE_STRNCPY simple_wcsncpy |
| # define STUPID_STRNCPY stupid_wcsncpy |
| # define STRNCPY wcsncpy |
| # endif /* WIDE */ |
| |
| CHAR *SIMPLE_STRNCPY (CHAR *, const CHAR *, size_t); |
| CHAR *STUPID_STRNCPY (CHAR *, const CHAR *, size_t); |
| |
| IMPL (STUPID_STRNCPY, 0) |
| IMPL (SIMPLE_STRNCPY, 0) |
| IMPL (STRNCPY, 1) |
| |
| CHAR * |
| SIMPLE_STRNCPY (CHAR *dst, const CHAR *src, size_t n) |
| { |
| CHAR *ret = dst; |
| while (n--) |
| if ((*dst++ = *src++) == '\0') |
| { |
| while (n--) |
| *dst++ = '\0'; |
| return ret; |
| } |
| return ret; |
| } |
| |
| CHAR * |
| STUPID_STRNCPY (CHAR *dst, const CHAR *src, size_t n) |
| { |
| size_t nc = STRNLEN (src, n); |
| size_t i; |
| |
| for (i = 0; i < nc; ++i) |
| dst[i] = src[i]; |
| for (; i < n; ++i) |
| dst[i] = '\0'; |
| return dst; |
| } |
| #endif /* !STRNCPY_RESULT */ |
| |
| typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t); |
| |
| static void |
| do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t len, size_t n) |
| { |
| size_t i, iters = INNER_LOOP_ITERS; |
| timing_t start, stop, cur; |
| |
| if (CALL (impl, dst, src, n) != STRNCPY_RESULT (dst, len, n)) |
| { |
| error (0, 0, "Wrong result in function %s %p %p", impl->name, |
| CALL (impl, dst, src, n), dst); |
| ret = 1; |
| return; |
| } |
| |
| if (memcmp (dst, src, (len > n ? n : len) * sizeof (CHAR)) != 0) |
| { |
| error (0, 0, "Wrong result in function %s", impl->name); |
| ret = 1; |
| return; |
| } |
| |
| if (n > len) |
| { |
| size_t i; |
| |
| for (i = len; i < n; ++i) |
| if (dst [i] != '\0') |
| { |
| error (0, 0, "Wrong result in function %s", impl->name); |
| ret = 1; |
| return; |
| } |
| } |
| |
| TIMING_NOW (start); |
| for (i = 0; i < iters; ++i) |
| { |
| 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 len, size_t n, int max_char) |
| { |
| size_t i; |
| CHAR *s1, *s2; |
| |
| /* For wcsncpy: align1 and align2 here mean alignment not in bytes, |
| but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t)). */ |
| align1 &= 7; |
| if ((align1 + len) * sizeof (CHAR) >= page_size) |
| return; |
| |
| align2 &= 7; |
| if ((align2 + len) * sizeof (CHAR) >= page_size) |
| return; |
| |
| s1 = (CHAR *) (buf1) + align1; |
| s2 = (CHAR *) (buf2) + align2; |
| |
| for (i = 0; i < len; ++i) |
| s1[i] = 32 + 23 * i % (max_char - 32); |
| s1[len] = 0; |
| for (i = len + 1; (i + align1) * sizeof (CHAR) < page_size && i < len + 64; |
| ++i) |
| s1[i] = 32 + 32 * i % (max_char - 32); |
| |
| printf ("Length %4zd, n %4zd, alignment %2zd/%2zd:", len, n, align1, align2); |
| |
| FOR_EACH_IMPL (impl, 0) |
| do_one_test (impl, s2, s1, len, n); |
| |
| putchar ('\n'); |
| } |
| |
| static int |
| test_main (void) |
| { |
| size_t i; |
| |
| test_init (); |
| |
| printf ("%28s", ""); |
| FOR_EACH_IMPL (impl, 0) |
| printf ("\t%s", impl->name); |
| putchar ('\n'); |
| |
| for (i = 1; i < 8; ++i) |
| { |
| do_test (i, i, 16, 16, SMALL_CHAR); |
| do_test (i, i, 16, 16, BIG_CHAR); |
| do_test (i, 2 * i, 16, 16, SMALL_CHAR); |
| do_test (2 * i, i, 16, 16, BIG_CHAR); |
| do_test (8 - i, 2 * i, 1 << i, 2 << i, SMALL_CHAR); |
| do_test (2 * i, 8 - i, 2 << i, 1 << i, SMALL_CHAR); |
| do_test (8 - i, 2 * i, 1 << i, 2 << i, BIG_CHAR); |
| do_test (2 * i, 8 - i, 2 << i, 1 << i, BIG_CHAR); |
| } |
| |
| for (i = 1; i < 8; ++i) |
| { |
| do_test (0, 0, 4 << i, 8 << i, SMALL_CHAR); |
| do_test (0, 0, 16 << i, 8 << i, SMALL_CHAR); |
| do_test (8 - i, 2 * i, 4 << i, 8 << i, SMALL_CHAR); |
| do_test (8 - i, 2 * i, 16 << i, 8 << i, SMALL_CHAR); |
| } |
| |
| return ret; |
| } |
| |
| #include <support/test-driver.c> |