1 /* Test and measure strncmp functions.
2 Copyright (C) 1999, 2002, 2003, 2010 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Written by Jakub Jelinek <jakub@redhat.com>, 1999.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 #include "test-string.h"
24 typedef int (*proto_t) (const char *, const char *, size_t);
25 int simple_strncmp (const char *, const char *, size_t);
26 int stupid_strncmp (const char *, const char *, size_t);
28 IMPL (stupid_strncmp, 0)
29 IMPL (simple_strncmp, 0)
33 simple_strncmp (const char *s1, const char *s2, size_t n)
37 while (n-- && (ret = *(unsigned char *) s1 - * (unsigned char *) s2++) == 0
43 stupid_strncmp (const char *s1, const char *s2, size_t n)
45 size_t ns1 = strnlen (s1, n) + 1, ns2 = strnlen (s2, n) + 1;
48 n = ns1 < n ? ns1 : n;
49 n = ns2 < n ? ns2 : n;
50 while (n-- && (ret = *(unsigned char *) s1++ - * (unsigned char *) s2++) == 0);
55 check_result (impl_t *impl, const char *s1, const char *s2, size_t n,
58 int result = CALL (impl, s1, s2, n);
59 if ((exp_result == 0 && result != 0)
60 || (exp_result < 0 && result >= 0)
61 || (exp_result > 0 && result <= 0))
63 error (0, 0, "Wrong result in function %s %d %d", impl->name,
73 do_one_test (impl_t *impl, const char *s1, const char *s2, size_t n,
76 if (check_result (impl, s1, s2, n, exp_result) < 0)
81 hp_timing_t start __attribute ((unused));
82 hp_timing_t stop __attribute ((unused));
83 hp_timing_t best_time = ~ (hp_timing_t) 0;
86 for (i = 0; i < 32; ++i)
88 HP_TIMING_NOW (start);
89 CALL (impl, s1, s2, n);
91 HP_TIMING_BEST (best_time, start, stop);
94 printf ("\t%zd", (size_t) best_time);
99 do_test_limit (size_t align1, size_t align2, size_t len, size_t n, int max_char,
107 s1 = (char*)(buf1 + page_size);
108 s2 = (char*)(buf2 + page_size);
110 printf ("Length %4zd/%4zd:", len, n);
112 FOR_EACH_IMPL (impl, 0)
113 do_one_test (impl, s1, s2, n, 0);
123 align_n = (page_size - n) & 15;
125 s1 = (char*)(buf1 + page_size - n);
126 s2 = (char*)(buf2 + page_size - n);
128 if (align1 < align_n)
129 s1 -= (align_n - align1);
131 if (align2 < align_n)
132 s2 -= (align_n - align2);
134 for (i = 0; i < n; i++)
135 s1[i] = s2[i] = 1 + 23 * i % max_char;
143 else if (exp_result > 0)
148 printf ("Length %4zd/%4zd, alignment %2zd/%2zd:", len, n, align1, align2);
150 FOR_EACH_IMPL (impl, 0)
151 do_one_test (impl, s1, s2, n, exp_result);
158 do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char,
168 if (align1 + n + 1 >= page_size)
172 if (align2 + n + 1 >= page_size)
175 s1 = (char*)(buf1 + align1);
176 s2 = (char*)(buf2 + align2);
178 for (i = 0; i < n; i++)
179 s1[i] = s2[i] = 1 + 23 * i % max_char;
181 s1[n] = 24 + exp_result;
187 else if (exp_result > 0)
190 s2[n - 1] -= exp_result;
193 printf ("Length %4zd/%4zd, alignment %2zd/%2zd:", len, n, align1, align2);
195 FOR_EACH_IMPL (impl, 0)
196 do_one_test (impl, (char*)s1, (char*)s2, n, exp_result);
203 do_page_test (size_t offset1, size_t offset2, char *s2)
208 if (offset1 >= page_size || offset2 >= page_size)
211 s1 = (char *) (buf1 + offset1);
216 FOR_EACH_IMPL (impl, 0)
218 check_result (impl, s1, s2, page_size, -exp_result);
219 check_result (impl, s2, s1, page_size, exp_result);
224 do_random_tests (void)
226 size_t i, j, n, align1, align2, pos, len1, len2, size;
229 unsigned char *p1 = buf1 + page_size - 512;
230 unsigned char *p2 = buf2 + page_size - 512;
232 for (n = 0; n < ITERATIONS; n++)
234 align1 = random () & 31;
236 align2 = random () & 31;
238 align2 = align1 + (random () & 24);
239 pos = random () & 511;
240 size = random () & 511;
241 j = align1 > align2 ? align1 : align2;
243 pos = 510 - j - (random () & 7);
244 len1 = random () & 511;
245 if (pos >= len1 && (random () & 1))
246 len1 = pos + (random () & 7);
248 len1 = 511 - j - (random () & 7);
252 len2 = len1 + (len1 != 511 - j ? random () % (511 - j - len1) : 0);
253 j = (pos > len2 ? pos : len2) + align1 + 64;
256 for (i = 0; i < j; ++i)
258 p1[i] = random () & 255;
259 if (i < len1 + align1 && !p1[i])
261 p1[i] = random () & 255;
263 p1[i] = 1 + (random () & 127);
266 for (i = 0; i < j; ++i)
268 p2[i] = random () & 255;
269 if (i < len2 + align2 && !p2[i])
271 p2[i] = random () & 255;
273 p2[i] = 1 + (random () & 127);
278 memcpy (p2 + align2, p1 + align1, pos);
281 if (p2[align2 + pos] == p1[align1 + pos])
283 p2[align2 + pos] = random () & 255;
284 if (p2[align2 + pos] == p1[align1 + pos])
285 p2[align2 + pos] = p1[align1 + pos] + 3 + (random () & 127);
290 if (p1[align1 + pos] < p2[align2 + pos])
296 p1[len1 + align1] = 0;
297 p2[len2 + align2] = 0;
299 FOR_EACH_IMPL (impl, 1)
301 r = CALL (impl, (char*)(p1 + align1), (char*)(p2 + align2), size);
302 /* Test whether on 64-bit architectures where ABI requires
303 callee to promote has the promotion been done. */
304 asm ("" : "=g" (r) : "0" (r));
305 if ((r == 0 && result)
306 || (r < 0 && result >= 0)
307 || (r > 0 && result <= 0))
309 error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd, %zd, %zd) %ld != %d, p1 %p p2 %p",
310 n, impl->name, align1, align2, len1, len2, pos, size, r, result, p1, p2);
320 char *s1 = (char *)(buf1 + 0xb2c);
321 char *s2 = (char *)(buf1 + 0xfd8);
325 strcpy(s1, "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrs");
326 strcpy(s2, "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkLMNOPQRSTUV");
328 for (i = 0; i < 80; i++)
330 exp_result = simple_strncmp (s1, s2, i);
331 FOR_EACH_IMPL (impl, 0)
332 check_result (impl, s1, s2, i, exp_result);
343 for (i = 0; i < page_size - 1; i++)
349 for (i = 0; i < 64; ++i)
350 do_page_test (3990 + i, 2635, s2);
366 FOR_EACH_IMPL (impl, 0)
367 printf ("\t%s", impl->name);
370 for (i =0; i < 16; ++i)
372 do_test (0, 0, 8, i, 127, 0);
373 do_test (0, 0, 8, i, 127, -1);
374 do_test (0, 0, 8, i, 127, 1);
375 do_test (i, i, 8, i, 127, 0);
376 do_test (i, i, 8, i, 127, 1);
377 do_test (i, i, 8, i, 127, -1);
378 do_test (i, 2 * i, 8, i, 127, 0);
379 do_test (2 * i, i, 8, i, 127, 1);
380 do_test (i, 3 * i, 8, i, 127, -1);
381 do_test (0, 0, 8, i, 255, 0);
382 do_test (0, 0, 8, i, 255, -1);
383 do_test (0, 0, 8, i, 255, 1);
384 do_test (i, i, 8, i, 255, 0);
385 do_test (i, i, 8, i, 255, 1);
386 do_test (i, i, 8, i, 255, -1);
387 do_test (i, 2 * i, 8, i, 255, 0);
388 do_test (2 * i, i, 8, i, 255, 1);
389 do_test (i, 3 * i, 8, i, 255, -1);
392 for (i = 1; i < 8; ++i)
394 do_test (0, 0, 8 << i, 16 << i, 127, 0);
395 do_test (0, 0, 8 << i, 16 << i, 127, 1);
396 do_test (0, 0, 8 << i, 16 << i, 127, -1);
397 do_test (0, 0, 8 << i, 16 << i, 255, 0);
398 do_test (0, 0, 8 << i, 16 << i, 255, 1);
399 do_test (0, 0, 8 << i, 16 << i, 255, -1);
400 do_test (8 - i, 2 * i, 8 << i, 16 << i, 127, 0);
401 do_test (8 - i, 2 * i, 8 << i, 16 << i, 127, 1);
402 do_test (2 * i, i, 8 << i, 16 << i, 255, 0);
403 do_test (2 * i, i, 8 << i, 16 << i, 255, 1);
406 do_test_limit (0, 0, 0, 0, 127, 0);
407 do_test_limit (4, 0, 21, 20, 127, 0);
408 do_test_limit (0, 4, 21, 20, 127, 0);
409 do_test_limit (8, 0, 25, 24, 127, 0);
410 do_test_limit (0, 8, 25, 24, 127, 0);
412 for (i = 0; i < 8; ++i)
414 do_test_limit (0, 0, 17 - i, 16 - i, 127, 0);
415 do_test_limit (0, 0, 17 - i, 16 - i, 255, 0);
416 do_test_limit (0, 0, 15 - i, 16 - i, 127, 0);
417 do_test_limit (0, 0, 15 - i, 16 - i, 127, 1);
418 do_test_limit (0, 0, 15 - i, 16 - i, 127, -1);
419 do_test_limit (0, 0, 15 - i, 16 - i, 255, 0);
420 do_test_limit (0, 0, 15 - i, 16 - i, 255, 1);
421 do_test_limit (0, 0, 15 - i, 16 - i, 255, -1);
428 #include "../test-skeleton.c"