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Diffstat (limited to 'string/test-memmove.c')
| -rw-r--r-- | string/test-memmove.c | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/string/test-memmove.c b/string/test-memmove.c new file mode 100644 index 0000000000..deb06e1e19 --- /dev/null +++ b/string/test-memmove.c @@ -0,0 +1,279 @@ +/* Test and measure memmove functions. + Copyright (C) 1999, 2002 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 char *(*proto_t) (char *, const char *, size_t); +char *simple_memmove (char *, const char *, size_t); + +IMPL (simple_memmove, 0) +IMPL (memmove, 1) + +char * +simple_memmove (char *dst, const char *src, size_t n) +{ + char *ret = dst; + if (src < dst) + { + dst += n; + src += n; + while (n--) + *--dst = *--src; + } + else + while (n--) + *dst++ = *src++; + return ret; +} + +static void +do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src, + size_t len) +{ + char *res; + + memcpy (src, orig_src, len); + res = CALL (impl, dst, src, len); + if (res != dst) + { + error (0, 0, "Wrong result in function %s %p %p", impl->name, + res, dst); + ret = 1; + return; + } + + if (memcmp (dst, orig_src, len) != 0) + { + error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"", + impl->name, dst, src); + ret = 1; + return; + } + + if (HP_TIMING_AVAIL) + { + hp_timing_t start, stop, best_time = ~ (hp_timing_t) 0; + size_t i; + + for (i = 0; i < 32; ++i) + { + HP_TIMING_NOW (start); + CALL (impl, dst, src, len); + HP_TIMING_NOW (stop); + HP_TIMING_BEST (best_time, start, stop); + } + + printf ("\t%zd", (size_t) best_time); + } +} + +static void +do_test (size_t align1, size_t align2, size_t len) +{ + size_t i, j; + char *s1, *s2; + + align1 &= 63; + if (align1 + len >= page_size) + return; + + align2 &= 63; + if (align2 + len >= page_size) + return; + + s1 = buf1 + align1; + s2 = buf2 + align2; + + for (i = 0, j = 1; i < len; i++, j += 23) + s1[i] = j; + + if (HP_TIMING_AVAIL) + printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2); + + FOR_EACH_IMPL (impl, 0) + do_one_test (impl, s2, buf2 + align1, s1, len); + + if (HP_TIMING_AVAIL) + putchar ('\n'); +} + +static void +do_random_tests (void) +{ + size_t i, n, align1, align2, len, size; + size_t srcstart, srcend, dststart, dstend; + int c; + unsigned char *p1, *p2; + unsigned char *res; + + for (n = 0; n < ITERATIONS; n++) + { + if ((random () & 255) == 0) + size = 65536; + else + size = 512; + if (size > page_size) + size = page_size; + if ((random () & 3) == 0) + { + len = random () & (size - 1); + align1 = size - len - (random () & 31); + align2 = size - len - (random () & 31); + if (align1 > size) + align1 = 0; + if (align2 > size) + align2 = 0; + } + else + { + align1 = random () & (size / 2 - 1); + align2 = random () & (size / 2 - 1); + len = random () & (size - 1); + if (align1 + len > size) + align1 = size - len; + if (align2 + len > size) + align2 = size - len; + } + + p1 = buf1 + page_size - size; + p2 = buf2 + page_size - size; + c = random () & 255; + srcend = align1 + len + 256; + if (srcend > size) + srcend = size; + if (align1 > 256) + srcstart = align1 - 256; + else + srcstart = 0; + for (i = srcstart; i < srcend; ++i) + p1[i] = random () & 255; + dstend = align2 + len + 256; + if (dstend > size) + dstend = size; + if (align2 > 256) + dststart = align2 - 256; + else + dststart = 0; + + FOR_EACH_IMPL (impl, 1) + { + memset (p2 + dststart, c, dstend - dststart); + memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart); + res = CALL (impl, p2 + align2, p2 + align1, len); + if (res != p2 + align2) + { + error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p", + n, impl->name, align1, align2, len, res, p2 + align2); + ret = 1; + } + if (memcmp (p1 + align1, p2 + align2, len)) + { + error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)", + n, impl->name, align1, align2, len); + ret = 1; + } + for (i = dststart; i < dstend; ++i) + { + if (i >= align2 && i < align2 + len) + { + i = align2 + len - 1; + continue; + } + if (i >= srcstart && i < srcend) + { + i = srcend - 1; + continue; + } + if (p2[i] != c) + { + error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)", + n, impl->name, align1, align2, len); + ret = 1; + break; + } + } + + if (srcstart < align2 + && memcmp (p2 + srcstart, p1 + srcstart, + (srcend > align2 ? align2 : srcend) - srcstart)) + { + error (0, 0, "Iteration %zd - garbage before dst, %s (%zd, %zd, %zd)", + n, impl->name, align1, align2, len); + ret = 1; + break; + } + + i = srcstart > align2 + len ? srcstart : align2 + len; + if (srcend > align2 + len + && memcmp (p2 + i, p1 + i, srcend - i)) + { + error (0, 0, "Iteration %zd - garbage after dst, %s (%zd, %zd, %zd)", + n, impl->name, align1, align2, len); + ret = 1; + break; + } + } + } +} + +int +test_main (void) +{ + size_t i; + + test_init (); + + printf ("%23s", ""); + FOR_EACH_IMPL (impl, 0) + printf ("\t%s", impl->name); + putchar ('\n'); + + for (i = 0; i < 14; ++i) + { + do_test (0, 32, 1 << i); + do_test (32, 0, 1 << i); + do_test (0, i, 1 << i); + do_test (i, 0, 1 << i); + } + + for (i = 0; i < 32; ++i) + { + do_test (0, 32, i); + do_test (32, 0, i); + do_test (0, i, i); + do_test (i, 0, i); + } + + for (i = 3; i < 32; ++i) + { + if ((i & (i - 1)) == 0) + continue; + do_test (0, 32, 16 * i); + do_test (32, 0, 16 * i); + do_test (0, i, 16 * i); + do_test (i, 0, 16 * i); + } + + do_random_tests (); + return ret; +} + +#include "../test-skeleton.c" |