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annotate tests/test-obstack-printf.c @ 17290:44c34bc536ac

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Fix typo in comment.
author Paul Eggert <eggert@cs.ucla.edu>
date Wed, 16 Jan 2013 09:38:28 -0800
parents e542fd46ad6f
children 344018b6e5d7
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1 /* Test of obstack_printf() and obstack_vprintf() functions.
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2 Copyright (C) 2008-2013 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 Eric Blake <ebb9@byu.net>, 2008. */
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18
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19 #include <config.h>
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20
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21 #include <stdio.h>
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22
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23 #include "signature.h"
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24 SIGNATURE_CHECK (obstack_printf, int, (struct obstack *, char const *, ...));
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25 SIGNATURE_CHECK (obstack_vprintf, int, (struct obstack *, char const *,
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26 va_list));
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27
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28 #include "obstack.h"
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29 #include "xalloc.h"
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30
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31 #include <stdarg.h>
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32 #include <stdlib.h>
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33 #include <string.h>
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34
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35 #include "progname.h"
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36 #include "macros.h"
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37
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38 #define obstack_chunk_alloc xmalloc
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39 #define obstack_chunk_free free
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40
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41 static void
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42 test_function (int (*my_obstack_printf) (struct obstack *, const char *, ...))
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43 {
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44 struct obstack obs;
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45 obstack_init (&obs);
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46 /* In general, be careful that arguments to obstack_* don't have
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47 side effects, as not all compilers evaluate macro arguments only
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48 once. */
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49
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50 /* Grow the obstack to near its boundary, then check that short
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51 output longer than the obstack free space grows the obstack. */
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52 {
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53 char *base = obstack_base (&obs);
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54 char *new_base;
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55 int result;
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56 int room = obstack_room (&obs) - 4;
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57
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58 obstack_blank_fast (&obs, room);
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59 result = my_obstack_printf (&obs, "%d %s", 123, "456");
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60 ASSERT (result == 7);
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61 ASSERT (result + room == obstack_object_size (&obs));
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62 obstack_1grow (&obs, 0);
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63 new_base = obstack_finish (&obs);
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64 ASSERT (base != new_base);
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65 ASSERT (strcmp (new_base + room, "123 456") == 0);
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66 }
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67
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68 /* Check that strings shorter than the obstack free space don't
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69 cause a reshuffling of the obstack. */
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70 {
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71 char *base = obstack_base (&obs);
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72 char *new_base;
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73 int result;
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74 int room = obstack_room (&obs);
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75
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76 ASSERT (8 < room);
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77 result = my_obstack_printf (&obs, "%d %s", 123, "456");
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78 ASSERT (result == 7);
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79 ASSERT (result == obstack_object_size (&obs));
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80 new_base = obstack_base (&obs);
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81 ASSERT (base == new_base);
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82 ASSERT (strncmp (base, "123 456", result) == 0);
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83 obstack_finish (&obs);
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84 }
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85
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86 /* Check for generating much more output than a chunk size. */
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87 {
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88 char *base = obstack_base (&obs);
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89 char *new_base;
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90 int result;
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91 int i;
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92
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93 ASSERT (obstack_chunk_size (&obs) < 10000);
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94 result = my_obstack_printf (&obs, "%010000d", 0);
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95 ASSERT (result == 10000);
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96 ASSERT (result == obstack_object_size (&obs));
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97 new_base = obstack_base (&obs);
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98 ASSERT (base != new_base);
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99 for (i = 0; i < 10000; i++)
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100 ASSERT (new_base[i] == '0');
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101 }
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102
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103 obstack_free (&obs, NULL);
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104 }
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105
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106 static int
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107 my_obstack_printf (struct obstack *obs, const char *format, ...)
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108 {
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109 va_list args;
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110 int ret;
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111
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112 va_start (args, format);
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113 ret = obstack_vprintf (obs, format, args);
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114 va_end (args);
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115 return ret;
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116 }
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117
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118 static void
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119 test_obstack_vprintf ()
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120 {
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121 test_function (my_obstack_printf);
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122 }
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123
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124 static void
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125 test_obstack_printf ()
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126 {
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127 test_function (obstack_printf);
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128 }
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129
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130 int
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131 main (int argc, char *argv[])
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132 {
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133 set_program_name (argv[0]);
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134
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135 test_obstack_vprintf ();
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136 test_obstack_printf ();
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137 return 0;
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138 }