1 /* Test for sizeinbase function. 2 3 Copyright 2014 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 https://www.gnu.org/licenses/. */ 19 20 21 #include <stdlib.h> 22 #include <stdio.h> 23 24 #include "gmp.h" 25 #include "gmp-impl.h" 26 #include "tests.h" 27 28 /* Exponents up to 2^SIZE_LOG */ 29 #ifndef SIZE_LOG 30 #define SIZE_LOG 13 31 #endif 32 33 #ifndef COUNT 34 #define COUNT 30 35 #endif 36 37 #define MAX_N (1<<SIZE_LOG) 38 39 int 40 main (int argc, char **argv) 41 { 42 mp_limb_t a; 43 mp_ptr pp, scratch; 44 mp_limb_t max_b; 45 int count = COUNT; 46 int test; 47 gmp_randstate_ptr rands; 48 TMP_DECL; 49 50 if (argc > 1) 51 { 52 char *end; 53 count = strtol (argv[1], &end, 0); 54 if (*end || count <= 0) 55 { 56 fprintf (stderr, "Invalid test count: %s.\n", argv[1]); 57 return 1; 58 } 59 } 60 61 tests_start (); 62 TMP_MARK; 63 rands = RANDS; 64 65 pp = TMP_ALLOC_LIMBS (MAX_N); 66 scratch = TMP_ALLOC_LIMBS (MAX_N); 67 max_b = numberof (mp_bases); 68 69 ASSERT_ALWAYS (max_b > 62); 70 ASSERT_ALWAYS (max_b < GMP_NUMB_MAX); 71 72 for (a = 2; a < max_b; ++a) 73 for (test = 0; test < count; ++test) 74 { 75 mp_size_t pn; 76 mp_limb_t exp; 77 mp_bitcnt_t res; 78 79 exp = gmp_urandomm_ui (rands, MAX_N); 80 81 pn = mpn_pow_1 (pp, &a, 1, exp, scratch); 82 83 res = mpn_sizeinbase (pp, pn, a) - 1; 84 85 if ((res < exp) || (res > exp + 1)) 86 { 87 printf ("ERROR in test %d, base = %d, exp = %d, res = %d\n", 88 test, (int) a, (int) exp, (int) res); 89 abort(); 90 } 91 92 mpn_sub_1 (pp, pp, pn, CNST_LIMB(1)); 93 pn -= pp[pn-1] == 0; 94 95 res = mpn_sizeinbase (pp, pn, a); 96 97 if ((res < exp) || (res - 1 > exp)) 98 { 99 printf ("ERROR in -1 test %d, base = %d, exp = %d, res = %d\n", 100 test, (int) a, (int) exp, (int) res); 101 abort(); 102 } 103 } 104 105 TMP_FREE; 106 tests_end (); 107 return 0; 108 } 109