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annotate tests/test-intprops.c @ 17460:d11431703671

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author Karl Berry <karl@freefriends.org>
date Fri, 09 Aug 2013 08:03:30 -0700
parents e542fd46ad6f
children
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1 /* Test intprops.h.
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2 Copyright (C) 2011-2013 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 Paul Eggert. */
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18
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19 /* Tell gcc not to warn about the many (X < 0) expressions that
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20 the overflow macros expand to. */
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21 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
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22 # pragma GCC diagnostic ignored "-Wtype-limits"
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23 #endif
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24
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25 #include <config.h>
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26
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27 #include "intprops.h"
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28 #include "verify.h"
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29
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30 #include <stdbool.h>
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31 #include <inttypes.h>
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32
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33 #include "macros.h"
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34
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35 /* VERIFY (X) uses a static assertion for compilers that are known to work,
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36 and falls back on a dynamic assertion for other compilers.
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37 These tests should be checkable via 'verify' rather than 'ASSERT', but
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38 using 'verify' would run into a bug with HP-UX 11.23 cc; see
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39 <http://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00401.html>. */
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40 #if __GNUC__ || __SUNPRO_C
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41 # define VERIFY(x) do { verify (x); } while (0)
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42 #else
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43 # define VERIFY(x) ASSERT (x)
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44 #endif
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45
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46 int
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47 main (void)
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48 {
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49 /* Use VERIFY for tests that must be integer constant expressions,
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50 ASSERT otherwise. */
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51
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52 /* TYPE_IS_INTEGER. */
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53 ASSERT (TYPE_IS_INTEGER (bool));
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54 ASSERT (TYPE_IS_INTEGER (char));
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55 ASSERT (TYPE_IS_INTEGER (signed char));
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56 ASSERT (TYPE_IS_INTEGER (unsigned char));
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57 ASSERT (TYPE_IS_INTEGER (short int));
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58 ASSERT (TYPE_IS_INTEGER (unsigned short int));
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59 ASSERT (TYPE_IS_INTEGER (int));
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60 ASSERT (TYPE_IS_INTEGER (unsigned int));
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61 ASSERT (TYPE_IS_INTEGER (long int));
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62 ASSERT (TYPE_IS_INTEGER (unsigned long int));
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63 ASSERT (TYPE_IS_INTEGER (intmax_t));
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64 ASSERT (TYPE_IS_INTEGER (uintmax_t));
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65 ASSERT (! TYPE_IS_INTEGER (float));
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66 ASSERT (! TYPE_IS_INTEGER (double));
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67 ASSERT (! TYPE_IS_INTEGER (long double));
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68
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69 /* TYPE_SIGNED. */
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70 /* VERIFY (! TYPE_SIGNED (bool)); // not guaranteed by gnulib substitute */
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71 VERIFY (TYPE_SIGNED (signed char));
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72 VERIFY (! TYPE_SIGNED (unsigned char));
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73 VERIFY (TYPE_SIGNED (short int));
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74 VERIFY (! TYPE_SIGNED (unsigned short int));
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75 VERIFY (TYPE_SIGNED (int));
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76 VERIFY (! TYPE_SIGNED (unsigned int));
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77 VERIFY (TYPE_SIGNED (long int));
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78 VERIFY (! TYPE_SIGNED (unsigned long int));
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79 VERIFY (TYPE_SIGNED (intmax_t));
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80 VERIFY (! TYPE_SIGNED (uintmax_t));
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81 ASSERT (TYPE_SIGNED (float));
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82 ASSERT (TYPE_SIGNED (double));
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83 ASSERT (TYPE_SIGNED (long double));
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84
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85 /* Integer representation. */
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86 VERIFY (INT_MIN + INT_MAX < 0
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87 ? (TYPE_TWOS_COMPLEMENT (int)
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88 && ! TYPE_ONES_COMPLEMENT (int) && ! TYPE_SIGNED_MAGNITUDE (int))
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89 : (! TYPE_TWOS_COMPLEMENT (int)
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90 && (TYPE_ONES_COMPLEMENT (int) || TYPE_SIGNED_MAGNITUDE (int))));
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91
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92 /* TYPE_MINIMUM, TYPE_MAXIMUM. */
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93 VERIFY (TYPE_MINIMUM (char) == CHAR_MIN);
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94 VERIFY (TYPE_MAXIMUM (char) == CHAR_MAX);
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95 VERIFY (TYPE_MINIMUM (unsigned char) == 0);
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96 VERIFY (TYPE_MAXIMUM (unsigned char) == UCHAR_MAX);
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97 VERIFY (TYPE_MINIMUM (signed char) == SCHAR_MIN);
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98 VERIFY (TYPE_MAXIMUM (signed char) == SCHAR_MAX);
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99 VERIFY (TYPE_MINIMUM (short int) == SHRT_MIN);
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100 VERIFY (TYPE_MAXIMUM (short int) == SHRT_MAX);
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101 VERIFY (TYPE_MINIMUM (unsigned short int) == 0);
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102 VERIFY (TYPE_MAXIMUM (unsigned short int) == USHRT_MAX);
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103 VERIFY (TYPE_MINIMUM (int) == INT_MIN);
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104 VERIFY (TYPE_MAXIMUM (int) == INT_MAX);
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105 VERIFY (TYPE_MINIMUM (unsigned int) == 0);
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106 VERIFY (TYPE_MAXIMUM (unsigned int) == UINT_MAX);
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107 VERIFY (TYPE_MINIMUM (long int) == LONG_MIN);
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108 VERIFY (TYPE_MAXIMUM (long int) == LONG_MAX);
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109 VERIFY (TYPE_MINIMUM (unsigned long int) == 0);
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110 VERIFY (TYPE_MAXIMUM (unsigned long int) == ULONG_MAX);
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111 VERIFY (TYPE_MINIMUM (intmax_t) == INTMAX_MIN);
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112 VERIFY (TYPE_MAXIMUM (intmax_t) == INTMAX_MAX);
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113 VERIFY (TYPE_MINIMUM (uintmax_t) == 0);
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114 VERIFY (TYPE_MAXIMUM (uintmax_t) == UINTMAX_MAX);
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115
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116 /* INT_BITS_STRLEN_BOUND. */
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117 VERIFY (INT_BITS_STRLEN_BOUND (1) == 1);
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118 VERIFY (INT_BITS_STRLEN_BOUND (2620) == 789);
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119
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120 /* INT_STRLEN_BOUND, INT_BUFSIZE_BOUND. */
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121 #ifdef INT32_MAX /* POSIX guarantees int32_t; this ports to non-POSIX. */
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122 VERIFY (INT_STRLEN_BOUND (int32_t) == sizeof ("-2147483648") - 1);
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123 VERIFY (INT_BUFSIZE_BOUND (int32_t) == sizeof ("-2147483648"));
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124 #endif
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125 #ifdef INT64_MAX
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126 VERIFY (INT_STRLEN_BOUND (int64_t) == sizeof ("-9223372036854775808") - 1);
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127 VERIFY (INT_BUFSIZE_BOUND (int64_t) == sizeof ("-9223372036854775808"));
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128 #endif
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129
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130 /* All the INT_<op>_RANGE_OVERFLOW tests are equally valid as
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131 INT_<op>_OVERFLOW tests, so define a single macro to do both. */
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132 #define CHECK_BINOP(op, a, b, min, max, overflow) \
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133 (INT_##op##_RANGE_OVERFLOW (a, b, min, max) == (overflow) \
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134 && INT_##op##_OVERFLOW (a, b) == (overflow))
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135 #define CHECK_UNOP(op, a, min, max, overflow) \
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136 (INT_##op##_RANGE_OVERFLOW (a, min, max) == (overflow) \
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137 && INT_##op##_OVERFLOW (a) == (overflow))
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138
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139 /* INT_<op>_RANGE_OVERFLOW, INT_<op>_OVERFLOW. */
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140 VERIFY (INT_ADD_RANGE_OVERFLOW (INT_MAX, 1, INT_MIN, INT_MAX));
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141 VERIFY (INT_ADD_OVERFLOW (INT_MAX, 1));
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142 VERIFY (CHECK_BINOP (ADD, INT_MAX, 1, INT_MIN, INT_MAX, true));
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143 VERIFY (CHECK_BINOP (ADD, INT_MAX, -1, INT_MIN, INT_MAX, false));
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144 VERIFY (CHECK_BINOP (ADD, INT_MIN, 1, INT_MIN, INT_MAX, false));
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145 VERIFY (CHECK_BINOP (ADD, INT_MIN, -1, INT_MIN, INT_MAX, true));
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146 VERIFY (CHECK_BINOP (ADD, UINT_MAX, 1u, 0u, UINT_MAX, true));
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147 VERIFY (CHECK_BINOP (ADD, 0u, 1u, 0u, UINT_MAX, false));
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148
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149 VERIFY (CHECK_BINOP (SUBTRACT, INT_MAX, 1, INT_MIN, INT_MAX, false));
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150 VERIFY (CHECK_BINOP (SUBTRACT, INT_MAX, -1, INT_MIN, INT_MAX, true));
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151 VERIFY (CHECK_BINOP (SUBTRACT, INT_MIN, 1, INT_MIN, INT_MAX, true));
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152 VERIFY (CHECK_BINOP (SUBTRACT, INT_MIN, -1, INT_MIN, INT_MAX, false));
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153 VERIFY (CHECK_BINOP (SUBTRACT, UINT_MAX, 1u, 0u, UINT_MAX, false));
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154 VERIFY (CHECK_BINOP (SUBTRACT, 0u, 1u, 0u, UINT_MAX, true));
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155
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156 VERIFY (CHECK_UNOP (NEGATE, INT_MIN, INT_MIN, INT_MAX,
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157 TYPE_TWOS_COMPLEMENT (int)));
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158 VERIFY (CHECK_UNOP (NEGATE, 0, INT_MIN, INT_MAX, false));
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159 VERIFY (CHECK_UNOP (NEGATE, INT_MAX, INT_MIN, INT_MAX, false));
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160 VERIFY (CHECK_UNOP (NEGATE, 0u, 0u, UINT_MAX, false));
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161 VERIFY (CHECK_UNOP (NEGATE, 1u, 0u, UINT_MAX, true));
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162 VERIFY (CHECK_UNOP (NEGATE, UINT_MAX, 0u, UINT_MAX, true));
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163
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164 VERIFY (CHECK_BINOP (MULTIPLY, INT_MAX, INT_MAX, INT_MIN, INT_MAX, true));
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165 VERIFY (CHECK_BINOP (MULTIPLY, INT_MAX, INT_MIN, INT_MIN, INT_MAX, true));
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166 VERIFY (CHECK_BINOP (MULTIPLY, INT_MIN, INT_MAX, INT_MIN, INT_MAX, true));
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167 VERIFY (CHECK_BINOP (MULTIPLY, INT_MIN, INT_MIN, INT_MIN, INT_MAX, true));
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168 VERIFY (CHECK_BINOP (MULTIPLY, -1, INT_MIN, INT_MIN, INT_MAX,
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169 INT_NEGATE_OVERFLOW (INT_MIN)));
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170 VERIFY (CHECK_BINOP (MULTIPLY, LONG_MIN / INT_MAX, (long int) INT_MAX,
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171 LONG_MIN, LONG_MIN, false));
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172
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173 VERIFY (CHECK_BINOP (DIVIDE, INT_MIN, -1, INT_MIN, INT_MAX,
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174 INT_NEGATE_OVERFLOW (INT_MIN)));
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175 VERIFY (CHECK_BINOP (DIVIDE, INT_MAX, 1, INT_MIN, INT_MAX, false));
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176 VERIFY (CHECK_BINOP (DIVIDE, (unsigned int) INT_MIN,
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177 -1u, 0u, UINT_MAX, false));
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178
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179 VERIFY (CHECK_BINOP (REMAINDER, INT_MIN, -1, INT_MIN, INT_MAX,
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180 INT_NEGATE_OVERFLOW (INT_MIN)));
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181 VERIFY (CHECK_BINOP (REMAINDER, INT_MAX, 1, INT_MIN, INT_MAX, false));
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182 VERIFY (CHECK_BINOP (REMAINDER, (unsigned int) INT_MIN,
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183 -1u, 0u, UINT_MAX, false));
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184
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185 VERIFY (CHECK_BINOP (LEFT_SHIFT, UINT_MAX, 1, 0u, UINT_MAX, true));
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186 VERIFY (CHECK_BINOP (LEFT_SHIFT, UINT_MAX / 2 + 1, 1, 0u, UINT_MAX, true));
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187 VERIFY (CHECK_BINOP (LEFT_SHIFT, UINT_MAX / 2, 1, 0u, UINT_MAX, false));
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188
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189 /* INT_<op>_OVERFLOW with mixed types. */
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190 #define CHECK_SUM(a, b, overflow) \
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191 VERIFY (INT_ADD_OVERFLOW (a, b) == (overflow)); \
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192 VERIFY (INT_ADD_OVERFLOW (b, a) == (overflow))
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193 CHECK_SUM (-1, LONG_MIN, true);
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194 CHECK_SUM (-1, UINT_MAX, false);
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195 CHECK_SUM (-1L, INT_MIN, INT_MIN == LONG_MIN);
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196 CHECK_SUM (0u, -1, true);
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197 CHECK_SUM (0u, 0, false);
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198 CHECK_SUM (0u, 1, false);
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199 CHECK_SUM (1, LONG_MAX, true);
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200 CHECK_SUM (1, UINT_MAX, true);
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diff changeset
201 CHECK_SUM (1L, INT_MAX, INT_MAX == LONG_MAX);
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diff changeset
202 CHECK_SUM (1u, INT_MAX, INT_MAX == UINT_MAX);
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diff changeset
203 CHECK_SUM (1u, INT_MIN, true);
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diff changeset
204
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diff changeset
205 VERIFY (! INT_SUBTRACT_OVERFLOW (INT_MAX, 1u));
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diff changeset
206 VERIFY (! INT_SUBTRACT_OVERFLOW (UINT_MAX, 1));
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diff changeset
207 VERIFY (! INT_SUBTRACT_OVERFLOW (0u, -1));
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diff changeset
208 VERIFY (INT_SUBTRACT_OVERFLOW (UINT_MAX, -1));
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diff changeset
209 VERIFY (INT_SUBTRACT_OVERFLOW (INT_MIN, 1u));
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diff changeset
210 VERIFY (INT_SUBTRACT_OVERFLOW (-1, 0u));
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diff changeset
211
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diff changeset
212 #define CHECK_PRODUCT(a, b, overflow) \
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213 VERIFY (INT_MULTIPLY_OVERFLOW (a, b) == (overflow)); \
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diff changeset
214 VERIFY (INT_MULTIPLY_OVERFLOW (b, a) == (overflow))
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diff changeset
215
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diff changeset
216 CHECK_PRODUCT (-1, 1u, true);
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diff changeset
217 CHECK_PRODUCT (-1, INT_MIN, INT_NEGATE_OVERFLOW (INT_MIN));
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diff changeset
218 CHECK_PRODUCT (-1, UINT_MAX, true);
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diff changeset
219 CHECK_PRODUCT (-12345, LONG_MAX / -12345 - 1, true);
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diff changeset
220 CHECK_PRODUCT (-12345, LONG_MAX / -12345, false);
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diff changeset
221 CHECK_PRODUCT (0, -1, false);
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diff changeset
222 CHECK_PRODUCT (0, 0, false);
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diff changeset
223 CHECK_PRODUCT (0, 0u, false);
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diff changeset
224 CHECK_PRODUCT (0, 1, false);
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diff changeset
225 CHECK_PRODUCT (0, INT_MAX, false);
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diff changeset
226 CHECK_PRODUCT (0, INT_MIN, false);
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diff changeset
227 CHECK_PRODUCT (0, UINT_MAX, false);
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diff changeset
228 CHECK_PRODUCT (0u, -1, false);
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diff changeset
229 CHECK_PRODUCT (0u, 0, false);
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diff changeset
230 CHECK_PRODUCT (0u, 0u, false);
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diff changeset
231 CHECK_PRODUCT (0u, 1, false);
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diff changeset
232 CHECK_PRODUCT (0u, INT_MAX, false);
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diff changeset
233 CHECK_PRODUCT (0u, INT_MIN, false);
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diff changeset
234 CHECK_PRODUCT (0u, UINT_MAX, false);
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diff changeset
235 CHECK_PRODUCT (1, INT_MAX, false);
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diff changeset
236 CHECK_PRODUCT (1, INT_MIN, false);
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diff changeset
237 CHECK_PRODUCT (1, UINT_MAX, false);
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diff changeset
238 CHECK_PRODUCT (1u, INT_MIN, true);
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diff changeset
239 CHECK_PRODUCT (1u, INT_MAX, UINT_MAX < INT_MAX);
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diff changeset
240 CHECK_PRODUCT (INT_MAX, UINT_MAX, true);
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241 CHECK_PRODUCT (INT_MAX, ULONG_MAX, true);
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242 CHECK_PRODUCT (INT_MIN, LONG_MAX / INT_MIN - 1, true);
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243 CHECK_PRODUCT (INT_MIN, LONG_MAX / INT_MIN, false);
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244 CHECK_PRODUCT (INT_MIN, UINT_MAX, true);
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245 CHECK_PRODUCT (INT_MIN, ULONG_MAX, true);
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246
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247 VERIFY (INT_DIVIDE_OVERFLOW (INT_MIN, -1L)
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248 == (TYPE_TWOS_COMPLEMENT (long int) && INT_MIN == LONG_MIN));
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249 VERIFY (! INT_DIVIDE_OVERFLOW (INT_MIN, UINT_MAX));
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250 VERIFY (! INT_DIVIDE_OVERFLOW (INTMAX_MIN, UINTMAX_MAX));
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251 VERIFY (! INT_DIVIDE_OVERFLOW (INTMAX_MIN, UINT_MAX));
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252 VERIFY (INT_DIVIDE_OVERFLOW (-11, 10u));
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253 VERIFY (INT_DIVIDE_OVERFLOW (-10, 10u));
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254 VERIFY (! INT_DIVIDE_OVERFLOW (-9, 10u));
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255 VERIFY (INT_DIVIDE_OVERFLOW (11u, -10));
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256 VERIFY (INT_DIVIDE_OVERFLOW (10u, -10));
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257 VERIFY (! INT_DIVIDE_OVERFLOW (9u, -10));
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258
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259 VERIFY (INT_REMAINDER_OVERFLOW (INT_MIN, -1L)
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260 == (TYPE_TWOS_COMPLEMENT (long int) && INT_MIN == LONG_MIN));
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261 VERIFY (INT_REMAINDER_OVERFLOW (-1, UINT_MAX));
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262 VERIFY (INT_REMAINDER_OVERFLOW ((intmax_t) -1, UINTMAX_MAX));
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263 VERIFY (INT_REMAINDER_OVERFLOW (INTMAX_MIN, UINT_MAX)
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264 == (INTMAX_MAX < UINT_MAX
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265 && - (unsigned int) INTMAX_MIN % UINT_MAX != 0));
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266 VERIFY (INT_REMAINDER_OVERFLOW (INT_MIN, ULONG_MAX)
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267 == (INT_MIN % ULONG_MAX != 1));
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268 VERIFY (! INT_REMAINDER_OVERFLOW (1u, -1));
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269 VERIFY (! INT_REMAINDER_OVERFLOW (37*39u, -39));
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270 VERIFY (INT_REMAINDER_OVERFLOW (37*39u + 1, -39));
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271 VERIFY (INT_REMAINDER_OVERFLOW (37*39u - 1, -39));
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272 VERIFY (! INT_REMAINDER_OVERFLOW (LONG_MAX, -INT_MAX));
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273
14741
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274 return 0;
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275 }