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annotate tests/test-freading.c @ 14351:724011432f7b

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Consistent macro naming for macros that use GCC __attribute__. * lib/di-set.h (_GL_ATTRIBUTE_NONNULL): Renamed from _ATTRIBUTE_NONNULL_. * lib/ino-map.h (_GL_ATTRIBUTE_NONNULL): Likewise. * lib/hash.h (_GL_ATTRIBUTE_WUR): Renamed from ATTRIBUTE_WUR. * lib/ignore-value.h (_GL_ATTRIBUTE_DEPRECATED): Renamed from ATTRIBUTE_DEPRECATED. * lib/openat.h (_GL_ATTRIBUTE_NORETURN): Renamed from ATTRIBUTE_NORETURN. * lib/sigpipe-die.h (_GL_ATTRIBUTE_NORETURN): Likewise. * lib/xmemdup0.h (_GL_ATTRIBUTE_NORETURN): Likewise. * lib/xstrtol.h (_GL_ATTRIBUTE_NORETURN): Likewise. * lib/xalloc.h (_GL_ATTRIBUTE_NORETURN): Likewise. (_GL_ATTRIBUTE_MALLOC): Renamed from ATTRIBUTE_MALLOC. (_GL_ATTRIBUTE_ALLOC_SIZE): Renamed from ATTRIBUTE_ALLOC_SIZE. * lib/version-etc.h (_GL_ATTRIBUTE_SENTINEL): Renamed from ATTRIBUTE_SENTINEL. * lib/safe-alloc.h (_GL_ATTRIBUTE_RETURN_CHECK): Renamed from ATTRIBUTE_RETURN_CHECK. * tests/test-ignore-value.c (_GL_ATTRIBUTE_RETURN_CHECK): Likewise. * tests/test-argmatch.c (_GL_ATTRIBUTE_NORETURN): Renamed from ATTRIBUTE_NORETURN. * tests/test-exclude.c (_GL_ATTRIBUTE_NORETURN): Likewise. Reported by Paul Eggert.
author Bruno Haible <bruno@clisp.org>
date Sun, 13 Feb 2011 23:44:28 +0100
parents 97fc9a21a8fb
children 8250f2777afc
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1 /* Test of freading() function.
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2 Copyright (C) 2007-2011 Free Software Foundation, Inc.
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3
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4 This program is free software: you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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16
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17 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
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18
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19 #include <config.h>
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20
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21 /* None of the files accessed by this test are large, so disable the
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22 fseek link warning if we are not using the gnulib fseek module. */
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23 #define _GL_NO_LARGE_FILES
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24 #include "freading.h"
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25
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26 #include <stdio.h>
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27
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28 #include "macros.h"
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29
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30 #define TESTFILE "t-freading.tmp"
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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 FILE *fp;
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36
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37 /* Create a file with some contents. Write-only file is never reading. */
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38 fp = fopen (TESTFILE, "w");
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39 ASSERT (fp);
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40 ASSERT (!freading (fp));
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41 ASSERT (fwrite ("foobarsh", 1, 8, fp) == 8);
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42 ASSERT (!freading (fp));
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43 ASSERT (fclose (fp) == 0);
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44
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45 /* Open it in read-only mode. Read-only file is always reading. */
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46 fp = fopen (TESTFILE, "r");
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47 ASSERT (fp);
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48 ASSERT (freading (fp));
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49 ASSERT (fgetc (fp) == 'f');
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50 ASSERT (freading (fp));
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51 ASSERT (fseek (fp, 2, SEEK_CUR) == 0);
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52 ASSERT (freading (fp));
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53 ASSERT (fgetc (fp) == 'b');
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54 ASSERT (freading (fp));
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55 fflush (fp);
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56 ASSERT (freading (fp));
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57 ASSERT (fgetc (fp) == 'a');
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58 ASSERT (freading (fp));
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59 ASSERT (fseek (fp, 0, SEEK_END) == 0);
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60 ASSERT (freading (fp));
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61 ASSERT (fclose (fp) == 0);
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62
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63 /* Open it in read-write mode. POSIX requires a reposition (fseek,
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64 fsetpos, rewind) or EOF when transitioning from read to write;
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65 freading is only deterministic after input or output, but this
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66 test case should be portable even on open, after reposition, and
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67 at EOF. */
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68 /* First a scenario with only fgetc, fseek, fputc. */
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69 fp = fopen (TESTFILE, "r+");
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70 ASSERT (fp);
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71 ASSERT (!freading (fp));
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72 ASSERT (fgetc (fp) == 'f');
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73 ASSERT (freading (fp));
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74 ASSERT (fseek (fp, 2, SEEK_CUR) == 0);
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75 /* freading (fp) is undefined here, but fwriting (fp) is false. */
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76 ASSERT (fgetc (fp) == 'b');
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77 ASSERT (freading (fp));
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78 /* This fseek call is necessary when switching from reading to writing.
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79 See the description of fopen(), ISO C 99 7.19.5.3.(6). */
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80 ASSERT (fseek (fp, 0, SEEK_CUR) == 0);
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81 /* freading (fp) is undefined here, but fwriting (fp) is false. */
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82 ASSERT (fputc ('x', fp) == 'x');
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83 ASSERT (!freading (fp));
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84 ASSERT (fseek (fp, 0, SEEK_END) == 0);
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85 /* freading (fp) is undefined here, because on some implementations (e.g.
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86 glibc) fseek causes a buffer to be read.
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87 fwriting (fp) is undefined as well. */
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88 ASSERT (fclose (fp) == 0);
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89
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90 /* Open it in read-write mode. POSIX requires a reposition (fseek,
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91 fsetpos, rewind) or EOF when transitioning from read to write;
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92 freading is only deterministic after input or output, but this
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93 test case should be portable even on open, after reposition, and
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94 at EOF. */
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95 /* Here a scenario that includes fflush. */
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96 fp = fopen (TESTFILE, "r+");
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97 ASSERT (fp);
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98 ASSERT (!freading (fp));
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99 ASSERT (fgetc (fp) == 'f');
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100 ASSERT (freading (fp));
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101 ASSERT (fseek (fp, 2, SEEK_CUR) == 0);
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102 /* freading (fp) is undefined here, but fwriting (fp) is false. */
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103 ASSERT (fgetc (fp) == 'b');
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104 ASSERT (freading (fp));
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105 fflush (fp);
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106 /* freading (fp) is undefined here, but fwriting (fp) is false. */
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107 ASSERT (fgetc (fp) == 'x');
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108 ASSERT (freading (fp));
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109 /* This fseek call is necessary when switching from reading to writing.
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110 See the description of fopen(), ISO C 99 7.19.5.3.(6). */
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111 ASSERT (fseek (fp, 0, SEEK_CUR) == 0);
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112 /* freading (fp) is undefined here, but fwriting (fp) is false. */
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113 ASSERT (fputc ('z', fp) == 'z');
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114 ASSERT (!freading (fp));
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115 ASSERT (fseek (fp, 0, SEEK_END) == 0);
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116 /* freading (fp) is undefined here, because on some implementations (e.g.
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117 glibc) fseek causes a buffer to be read.
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118 fwriting (fp) is undefined as well. */
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119 ASSERT (fclose (fp) == 0);
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120
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121 /* Open it in append mode. Write-only file is never reading. */
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122 fp = fopen (TESTFILE, "a");
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123 ASSERT (fp);
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124 ASSERT (!freading (fp));
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125 ASSERT (fwrite ("bla", 1, 3, fp) == 3);
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parents:
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126 ASSERT (!freading (fp));
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127 ASSERT (fclose (fp) == 0);
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128 ASSERT (remove (TESTFILE) == 0);
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129 return 0;
367787d55c9c Implement freading and fwriting.
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130 }