annotate tests/test-memchr2.c @ 17149:a49df7b88261

errno: port to LynxOS 178 2.2.2 Problem reported by Joel Brobecker in <http://lists.gnu.org/archive/html/bug-gnulib/2012-10/msg00088.html>. * doc/posix-headers/errno.texi (errno.h): Document this. * lib/errno.in.h (EILSEQ, GNULIB_defined_EILSEQ) [!EILSEQ]: New macros. * lib/strerror-override.c, lib/strerror-override.h (strerror_override): Supply a string for EILSEQ. * m4/errno_h.m4 (gl_HEADER_ERRNO_H): Check for EILSEQ.
author Paul Eggert <eggert@cs.ucla.edu>
date Thu, 01 Nov 2012 15:29:14 -0700
parents 8250f2777afc
children e542fd46ad6f
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1 /*
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2 * Copyright (C) 2008-2012 Free Software Foundation, Inc.
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3 * Written by Eric Blake
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4 *
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5 * This program is free software: you can redistribute it and/or modify
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6 * it under the terms of the GNU General Public License as published by
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7 * the Free Software Foundation; either version 3 of the License, or
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8 * (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 #include <config.h>
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19
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20 #include "memchr2.h"
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21
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22 #include <stdlib.h>
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23 #include <string.h>
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24
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25 #include "zerosize-ptr.h"
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26 #include "macros.h"
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27
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28 /* Calculating void * + int is not portable, so this wrapper converts
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29 to char * to make the tests easier to write. */
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30 #define MEMCHR2 (char *) memchr2
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31
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32 int
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33 main (void)
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34 {
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35 size_t n = 0x100000;
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36 char *input = malloc (n);
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37 ASSERT (input);
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38
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39 input[0] = 'a';
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40 input[1] = 'b';
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41 memset (input + 2, 'c', 1024);
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42 memset (input + 1026, 'd', n - 1028);
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43 input[n - 2] = 'e';
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44 input[n - 1] = 'a';
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45
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46 /* Basic behavior tests. */
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47 ASSERT (MEMCHR2 (input, 'a', 'b', n) == input);
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48 ASSERT (MEMCHR2 (input, 'b', 'a', n) == input);
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49
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50 ASSERT (MEMCHR2 (input, 'a', 'b', 0) == NULL);
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51 ASSERT (MEMCHR2 (zerosize_ptr (), 'a', 'b', 0) == NULL);
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52
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53 ASSERT (MEMCHR2 (input, 'b', 'd', n) == input + 1);
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54 ASSERT (MEMCHR2 (input + 2, 'b', 'd', n - 2) == input + 1026);
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55
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56 ASSERT (MEMCHR2 (input, 'd', 'e', n) == input + 1026);
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57 ASSERT (MEMCHR2 (input, 'e', 'd', n) == input + 1026);
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58
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59 ASSERT (MEMCHR2 (input + 1, 'a', 'e', n - 1) == input + n - 2);
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60 ASSERT (MEMCHR2 (input + 1, 'e', 'a', n - 1) == input + n - 2);
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61
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62 ASSERT (MEMCHR2 (input, 'f', 'g', n) == NULL);
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63 ASSERT (MEMCHR2 (input, 'f', '\0', n) == NULL);
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64
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65 ASSERT (MEMCHR2 (input, 'a', 'a', n) == input);
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66 ASSERT (MEMCHR2 (input + 1, 'a', 'a', n - 1) == input + n - 1);
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67 ASSERT (MEMCHR2 (input, 'f', 'f', n) == NULL);
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68
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69 /* Check that a very long haystack is handled quickly if one of the
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70 two bytes is found near the beginning. */
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71 {
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72 size_t repeat = 10000;
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73 for (; repeat > 0; repeat--)
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74 {
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75 ASSERT (MEMCHR2 (input, 'c', 'e', n) == input + 2);
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76 ASSERT (MEMCHR2 (input, 'e', 'c', n) == input + 2);
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77 ASSERT (MEMCHR2 (input, 'c', '\0', n) == input + 2);
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78 ASSERT (MEMCHR2 (input, '\0', 'c', n) == input + 2);
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79 }
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80 }
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81
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82 /* Alignment tests. */
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83 {
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84 int i, j;
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85 for (i = 0; i < 32; i++)
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86 {
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87 for (j = 0; j < 256; j++)
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88 input[i + j] = j;
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89 for (j = 0; j < 256; j++)
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90 {
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91 ASSERT (MEMCHR2 (input + i, j, 0xff, 256) == input + i + j);
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92 ASSERT (MEMCHR2 (input + i, 0xff, j, 256) == input + i + j);
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93 }
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94 }
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95 }
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96
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97 free (input);
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98
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99 return 0;
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100 }