1 | /* Test mpz_abs, mpz_add, mpz_cmp, mpz_cmp_ui, mpz_fdiv_qr_ui, mpz_fdiv_q_ui, |
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2 | mpz_fdiv_r_ui, mpz_fdiv_ui, mpz_mul_ui. |
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3 | |
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4 | Copyright 1993, 1994, 1996, 2000, 2001, 2002 Free Software Foundation, Inc. |
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5 | |
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6 | This file is part of the GNU MP Library. |
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7 | |
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8 | The GNU MP Library is free software; you can redistribute it and/or modify |
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9 | it under the terms of the GNU Lesser General Public License as published by |
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10 | the Free Software Foundation; either version 2.1 of the License, or (at your |
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11 | option) any later version. |
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12 | |
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13 | The GNU MP Library is distributed in the hope that it will be useful, but |
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14 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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16 | License for more details. |
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17 | |
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18 | You should have received a copy of the GNU Lesser General Public License |
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19 | along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
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20 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
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21 | MA 02111-1307, USA. */ |
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22 | |
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23 | #include <stdio.h> |
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24 | #include <stdlib.h> |
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25 | |
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26 | #include "gmp.h" |
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27 | #include "gmp-impl.h" |
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28 | #include "tests.h" |
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29 | |
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30 | void dump_abort _PROTO ((char *, mpz_t, unsigned long)); |
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31 | void debug_mp _PROTO ((mpz_t, int)); |
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32 | |
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33 | int |
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34 | main (int argc, char **argv) |
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35 | { |
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36 | mpz_t dividend; |
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37 | mpz_t quotient, remainder; |
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38 | mpz_t quotient2, remainder2; |
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39 | mpz_t temp; |
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40 | mp_size_t dividend_size; |
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41 | unsigned long divisor; |
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42 | int i; |
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43 | int reps = 10000; |
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44 | gmp_randstate_ptr rands; |
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45 | mpz_t bs; |
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46 | unsigned long bsi, size_range; |
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47 | unsigned long r_rq, r_q, r_r, r; |
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48 | |
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49 | tests_start (); |
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50 | rands = RANDS; |
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51 | |
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52 | mpz_init (bs); |
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53 | |
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54 | if (argc == 2) |
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55 | reps = atoi (argv[1]); |
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56 | |
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57 | mpz_init (dividend); |
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58 | mpz_init (quotient); |
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59 | mpz_init (remainder); |
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60 | mpz_init (quotient2); |
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61 | mpz_init (remainder2); |
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62 | mpz_init (temp); |
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63 | |
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64 | for (i = 0; i < reps; i++) |
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65 | { |
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66 | mpz_urandomb (bs, rands, 32); |
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67 | size_range = mpz_get_ui (bs) % 10 + 2; /* 0..2047 bit operands */ |
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68 | |
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69 | do |
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70 | { |
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71 | mpz_rrandomb (bs, rands, 64); |
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72 | divisor = mpz_get_ui (bs); |
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73 | } |
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74 | while (divisor == 0); |
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75 | |
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76 | mpz_urandomb (bs, rands, size_range); |
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77 | dividend_size = mpz_get_ui (bs); |
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78 | mpz_rrandomb (dividend, rands, dividend_size); |
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79 | |
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80 | mpz_urandomb (bs, rands, 2); |
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81 | bsi = mpz_get_ui (bs); |
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82 | if ((bsi & 1) != 0) |
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83 | mpz_neg (dividend, dividend); |
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84 | |
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85 | /* printf ("%ld\n", SIZ (dividend)); */ |
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86 | |
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87 | r_rq = mpz_fdiv_qr_ui (quotient, remainder, dividend, divisor); |
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88 | r_q = mpz_fdiv_q_ui (quotient2, dividend, divisor); |
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89 | r_r = mpz_fdiv_r_ui (remainder2, dividend, divisor); |
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90 | r = mpz_fdiv_ui (dividend, divisor); |
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91 | |
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92 | /* First determine that the quotients and remainders computed |
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93 | with different functions are equal. */ |
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94 | if (mpz_cmp (quotient, quotient2) != 0) |
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95 | dump_abort ("quotients from mpz_fdiv_qr_ui and mpz_fdiv_q_ui differ", |
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96 | dividend, divisor); |
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97 | if (mpz_cmp (remainder, remainder2) != 0) |
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98 | dump_abort ("remainders from mpz_fdiv_qr_ui and mpz_fdiv_r_ui differ", |
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99 | dividend, divisor); |
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100 | |
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101 | /* Check if the sign of the quotient is correct. */ |
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102 | if (mpz_cmp_ui (quotient, 0) != 0) |
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103 | if ((mpz_cmp_ui (quotient, 0) < 0) |
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104 | != (mpz_cmp_ui (dividend, 0) < 0)) |
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105 | dump_abort ("quotient sign wrong", dividend, divisor); |
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106 | |
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107 | /* Check if the remainder has the same sign as the (positive) divisor |
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108 | (quotient rounded towards minus infinity). */ |
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109 | if (mpz_cmp_ui (remainder, 0) != 0) |
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110 | if (mpz_cmp_ui (remainder, 0) < 0) |
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111 | dump_abort ("remainder sign wrong", dividend, divisor); |
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112 | |
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113 | mpz_mul_ui (temp, quotient, divisor); |
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114 | mpz_add (temp, temp, remainder); |
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115 | if (mpz_cmp (temp, dividend) != 0) |
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116 | dump_abort ("n mod d != n - [n/d]*d", dividend, divisor); |
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117 | |
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118 | mpz_abs (remainder, remainder); |
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119 | if (mpz_cmp_ui (remainder, divisor) >= 0) |
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120 | dump_abort ("remainder greater than divisor", dividend, divisor); |
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121 | |
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122 | if (mpz_cmp_ui (remainder, r_rq) != 0) |
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123 | dump_abort ("remainder returned from mpz_fdiv_qr_ui is wrong", |
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124 | dividend, divisor); |
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125 | if (mpz_cmp_ui (remainder, r_q) != 0) |
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126 | dump_abort ("remainder returned from mpz_fdiv_q_ui is wrong", |
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127 | dividend, divisor); |
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128 | if (mpz_cmp_ui (remainder, r_r) != 0) |
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129 | dump_abort ("remainder returned from mpz_fdiv_r_ui is wrong", |
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130 | dividend, divisor); |
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131 | if (mpz_cmp_ui (remainder, r) != 0) |
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132 | dump_abort ("remainder returned from mpz_fdiv_ui is wrong", |
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133 | dividend, divisor); |
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134 | } |
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135 | |
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136 | mpz_clear (bs); |
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137 | mpz_clear (dividend); |
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138 | mpz_clear (quotient); |
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139 | mpz_clear (remainder); |
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140 | mpz_clear (quotient2); |
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141 | mpz_clear (remainder2); |
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142 | mpz_clear (temp); |
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143 | |
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144 | tests_end (); |
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145 | exit (0); |
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146 | } |
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147 | |
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148 | void |
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149 | dump_abort (char *str, mpz_t dividend, unsigned long divisor) |
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150 | { |
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151 | fprintf (stderr, "ERROR: %s\n", str); |
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152 | fprintf (stderr, "dividend = "); debug_mp (dividend, -16); |
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153 | fprintf (stderr, "divisor = %lX\n", divisor); |
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154 | abort(); |
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155 | } |
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156 | |
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157 | void |
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158 | debug_mp (mpz_t x, int base) |
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159 | { |
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160 | mpz_out_str (stderr, base, x); fputc ('\n', stderr); |
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161 | } |
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