1 /* Tests of mpz_scan0 and mpz_scan1. 2 3 Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc. 4 5 This file is part of the GNU MP Library test suite. 6 7 The GNU MP Library test suite is free software; you can redistribute it 8 and/or modify it under the terms of the GNU General Public License as 9 published by the Free Software Foundation; either version 3 of the License, 10 or (at your option) any later version. 11 12 The GNU MP Library test suite is distributed in the hope that it will be 13 useful, but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General 15 Public License for more details. 16 17 You should have received a copy of the GNU General Public License along with 18 the GNU MP Library test suite. If not, see http://www.gnu.org/licenses/. */ 19 20 #include <stdio.h> 21 #include <stdlib.h> 22 #include "gmp.h" 23 #include "gmp-impl.h" 24 #include "tests.h" 25 26 27 unsigned long 28 refmpz_scan (mpz_srcptr z, unsigned long i, int sought) 29 { 30 unsigned long z_bits = (unsigned long) ABSIZ(z) * GMP_NUMB_BITS; 31 32 do 33 { 34 if (mpz_tstbit (z, i) == sought) 35 return i; 36 i++; 37 } 38 while (i <= z_bits); 39 40 return ULONG_MAX; 41 } 42 43 unsigned long 44 refmpz_scan0 (mpz_srcptr z, unsigned long starting_bit) 45 { 46 return refmpz_scan (z, starting_bit, 0); 47 } 48 49 unsigned long 50 refmpz_scan1 (mpz_srcptr z, unsigned long starting_bit) 51 { 52 return refmpz_scan (z, starting_bit, 1); 53 } 54 55 56 void 57 check_ref (void) 58 { 59 static const int offset[] = { 60 -2, -1, 0, 1, 2, 3 61 }; 62 63 mpz_t z; 64 int test, neg, sought, oindex, o; 65 mp_size_t size, isize; 66 unsigned long start, got, want; 67 68 mpz_init (z); 69 for (test = 0; test < 5; test++) 70 { 71 for (size = 0; size < 5; size++) 72 { 73 mpz_random2 (z, size); 74 75 for (neg = 0; neg <= 1; neg++) 76 { 77 if (neg) 78 mpz_neg (z, z); 79 80 for (isize = 0; isize <= size; isize++) 81 { 82 for (oindex = 0; oindex < numberof (offset); oindex++) 83 { 84 o = offset[oindex]; 85 if ((int) isize*GMP_NUMB_BITS < -o) 86 continue; /* start would be negative */ 87 88 start = isize*GMP_NUMB_BITS + o; 89 90 for (sought = 0; sought <= 1; sought++) 91 { 92 if (sought == 0) 93 { 94 got = mpz_scan0 (z, start); 95 want = refmpz_scan0 (z, start); 96 } 97 else 98 { 99 got = mpz_scan1 (z, start); 100 want = refmpz_scan1 (z, start); 101 } 102 103 if (got != want) 104 { 105 printf ("wrong at test=%d, size=%ld, neg=%d, start=%lu, sought=%d\n", 106 test, size, neg, start, sought); 107 printf (" z 0x"); 108 mpz_out_str (stdout, -16, z); 109 printf ("\n"); 110 printf (" got=%lu, want=%lu\n", got, want); 111 exit (1); 112 } 113 } 114 } 115 } 116 } 117 } 118 } 119 mpz_clear (z); 120 } 121 122 123 int 124 main (int argc, char *argv[]) 125 { 126 tests_start (); 127 128 check_ref (); 129 130 tests_end (); 131 exit (0); 132 } 133