1 /* Test mpn_scan0 and mpn_scan1. 2 3 Copyright 2002 Free Software Foundation, Inc. 4 5 This file is part of the GNU MP Library. 6 7 The GNU MP Library is free software; you can redistribute it and/or modify 8 it under the terms of the GNU Lesser General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or (at your 10 option) any later version. 11 12 The GNU MP Library is distributed in the hope that it will be useful, but 13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15 License for more details. 16 17 You should have received a copy of the GNU Lesser General Public License 18 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ 19 20 #include <stdio.h> 21 #include <stdlib.h> 22 23 #include "gmp.h" 24 #include "gmp-impl.h" 25 26 #include "tests.h" 27 28 29 #define SIZE ((mp_size_t) 3) 30 mp_limb_t x[SIZE+1]; 31 32 void 33 check (void) 34 { 35 unsigned long i, got, want; 36 37 x[SIZE] = 1; 38 for (i = 0; i < SIZE*GMP_NUMB_BITS; i++) 39 { 40 got = refmpn_scan1 (x, i); 41 want = mpn_scan1 (x, i); 42 if (got != want) 43 { 44 printf ("mpn_scan1\n"); 45 printf (" i %lu\n", i); 46 printf (" got %lu\n", got); 47 printf (" want %lu\n", want); 48 mpn_trace (" x ", x, SIZE); 49 abort (); 50 } 51 } 52 53 x[SIZE] = 0; 54 for (i = 0; i < SIZE*GMP_NUMB_BITS; i++) 55 { 56 got = refmpn_scan0 (x, i); 57 want = mpn_scan0 (x, i); 58 if (got != want) 59 { 60 printf ("mpn_scan0\n"); 61 printf (" i %lu\n", i); 62 printf (" got %lu\n", got); 63 printf (" want %lu\n", want); 64 mpn_trace (" x ", x, SIZE); 65 abort (); 66 } 67 } 68 } 69 70 void 71 check_twobits (void) 72 { 73 #define TWOBITS(a, b) \ 74 ((CNST_LIMB(1) << (a)) | (CNST_LIMB(1) << (b))) 75 76 refmpn_zero (x, SIZE); 77 x[0] = TWOBITS (1, 0); 78 check (); 79 80 refmpn_zero (x, SIZE); 81 x[0] = TWOBITS (GMP_NUMB_BITS-1, 1); 82 check (); 83 84 refmpn_zero (x, SIZE); 85 x[0] = CNST_LIMB(1); 86 x[1] = CNST_LIMB(1); 87 check (); 88 89 refmpn_zero (x, SIZE); 90 x[0] = CNST_LIMB(1) << (GMP_NUMB_BITS-1); 91 x[1] = CNST_LIMB(1); 92 check (); 93 94 refmpn_zero (x, SIZE); 95 x[1] = TWOBITS (1, 0); 96 check (); 97 98 refmpn_zero (x, SIZE); 99 x[1] = CNST_LIMB(1); 100 x[2] = CNST_LIMB(1); 101 check (); 102 } 103 104 /* This is unused, it takes too long, especially on 64-bit systems. */ 105 void 106 check_twobits_exhaustive (void) 107 { 108 unsigned long i, j; 109 110 for (i = 0; i < GMP_NUMB_BITS * SIZE; i++) 111 { 112 for (j = 0; j < GMP_NUMB_BITS * SIZE; j++) 113 { 114 refmpn_zero (x, SIZE); 115 refmpn_setbit (x, i); 116 refmpn_setbit (x, j); 117 check (); 118 } 119 } 120 } 121 122 void 123 check_rand (void) 124 { 125 int i; 126 127 for (i = 0; i < 100; i++) 128 { 129 refmpn_random2 (x, SIZE); 130 check (); 131 } 132 } 133 134 int 135 main (void) 136 { 137 mp_trace_base = -16; 138 tests_start (); 139 140 check_twobits (); 141 check_rand (); 142 143 tests_end (); 144 exit (0); 145 } 146