1 /* Test and measure memccpy functions.
2 Copyright (C) 1999-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
20 #define TEST_NAME "memccpy"
21 #include "test-string.h"
25 /* Naive implementation to verify results. */
27 simple_memccpy (void *dst, const void *src, int c, size_t n)
33 if ((*d++ = *s++) == (char) c)
39 typedef void *(*proto_t) (void *, const void *, int c, size_t);
42 do_one_test (impl_t *impl, void *dst, const void *src, int c, size_t len,
45 void *expect = len > n ? NULL : (char *) dst + len;
46 if (CALL (impl, dst, src, c, n) != expect)
48 error (0, 0, "Wrong result in function %s %p %p", impl->name,
49 CALL (impl, dst, src, c, n), expect);
54 if (memcmp (dst, src, len > n ? n : len) != 0)
56 error (0, 0, "Wrong result in function %s", impl->name);
63 do_test (size_t align1, size_t align2, int c, size_t len, size_t n,
70 if (align1 + len >= page_size)
74 if (align2 + len >= page_size)
77 s1 = (char *) (buf1 + align1);
78 s2 = (char *) (buf2 + align2);
80 for (i = 0; i < len - 1; ++i)
82 s1[i] = 32 + 23 * i % (max_char - 32);
83 if (s1[i] == (char) c)
87 for (i = len; i + align1 < page_size && i < len + 64; ++i)
88 s1[i] = 32 + 32 * i % (max_char - 32);
90 FOR_EACH_IMPL (impl, 0)
91 do_one_test (impl, s2, s1, c, len, n);
95 do_random_tests (void)
97 size_t i, j, n, align1, align2, len, size, mode;
98 unsigned char *p1 = buf1 + page_size - 512;
99 unsigned char *p2 = buf2 + page_size - 512;
100 unsigned char *res, c;
102 for (n = 0; n < ITERATIONS; n++)
108 size = random () & 255;
109 align1 = 512 - size - (random () & 15);
111 align2 = align1 - (random () & 24);
113 align2 = align1 - (random () & 31);
121 len = size - (random () & 31);
125 len = random () & 511;
129 align1 = random () & 31;
131 align2 = random () & 31;
133 align2 = align1 + (random () & 24);
134 len = random () & 511;
140 size = random () & 511;
142 size = 512 - j - (random() & 31);
146 if ((mode & 8) && len + j >= 512)
147 len = 512 - j - (random () & 7);
149 j = len + align1 + 64;
152 for (i = 0; i < j; i++)
154 if (i == len + align1)
158 p1[i] = random () & 255;
159 if (i >= align1 && i < len + align1 && p1[i] == c)
160 p1[i] = (random () & 127) + 3 + c;
164 FOR_EACH_IMPL (impl, 1)
166 unsigned char *expect;
167 memset (p2 - 64, '\1', 512 + 64);
168 res = CALL (impl, p2 + align2, p1 + align1, (char) c, size);
172 expect = p2 + align2 + len + 1;
176 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd, %d) %p != %p",
177 n, impl->name, align1, align2, len, size, c, res, expect);
180 for (j = 0; j < align2 + 64; ++j)
182 if (p2[j - 64] != '\1')
184 error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
185 n, impl->name, align1, align2, len);
190 j = align2 + len + 1;
191 if (size + align2 < j)
197 error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
198 n, impl->name, align1, align2, len);
206 if (memcmp (p1 + align1, p2 + align2, j))
208 error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
209 n, impl->name, align1, align2, len);
224 FOR_EACH_IMPL (impl, 0)
225 printf ("\t%s", impl->name);
228 for (i = 1; i < 8; ++i)
230 do_test (i, i, 12, 16, 16, 127);
231 do_test (i, i, 23, 16, 16, 255);
232 do_test (i, 2 * i, 28, 16, 16, 127);
233 do_test (2 * i, i, 31, 16, 16, 255);
234 do_test (8 - i, 2 * i, 1, 1 << i, 2 << i, 127);
235 do_test (2 * i, 8 - i, 17, 2 << i, 1 << i, 127);
236 do_test (8 - i, 2 * i, 0, 1 << i, 2 << i, 255);
237 do_test (2 * i, 8 - i, i, 2 << i, 1 << i, 255);
240 for (i = 1; i < 8; ++i)
242 do_test (0, 0, i, 4 << i, 8 << i, 127);
243 do_test (0, 0, i, 16 << i, 8 << i, 127);
244 do_test (8 - i, 2 * i, i, 4 << i, 8 << i, 127);
245 do_test (8 - i, 2 * i, i, 16 << i, 8 << i, 127);
252 #include <support/test-driver.c>