1 /* Test file for mpfr_log10. 2 3 Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. 4 Contributed by the Arenaire and Cacao projects, INRIA. 5 6 This file is part of the GNU MPFR Library. 7 8 The GNU MPFR Library is free software; you can redistribute it and/or modify 9 it under the terms of the GNU Lesser General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or (at your 11 option) any later version. 12 13 The GNU MPFR Library is distributed in the hope that it will be useful, but 14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16 License for more details. 17 18 You should have received a copy of the GNU Lesser General Public License 19 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see 20 http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., 21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23 #include <stdio.h> 24 #include <stdlib.h> 25 26 #include "mpfr-test.h" 27 28 #ifdef CHECK_EXTERNAL 29 static int 30 test_log10 (mpfr_ptr a, mpfr_srcptr b, mpfr_rnd_t rnd_mode) 31 { 32 int res; 33 int ok = rnd_mode == MPFR_RNDN && mpfr_number_p (b) && mpfr_get_prec (a)>=53; 34 if (ok) 35 { 36 mpfr_print_raw (b); 37 } 38 res = mpfr_log10 (a, b, rnd_mode); 39 if (ok) 40 { 41 printf (" "); 42 mpfr_print_raw (a); 43 printf ("\n"); 44 } 45 return res; 46 } 47 #else 48 #define test_log10 mpfr_log10 49 #endif 50 51 #define TEST_FUNCTION test_log10 52 #define TEST_RANDOM_POS 8 53 #include "tgeneric.c" 54 55 int 56 main (int argc, char *argv[]) 57 { 58 mpfr_t x, y; 59 unsigned int n; 60 int inex; 61 62 tests_start_mpfr (); 63 64 test_generic (2, 100, 20); 65 66 mpfr_init2 (x, 53); 67 mpfr_init2 (y, 53); 68 69 /* check NaN */ 70 mpfr_set_nan (x); 71 inex = test_log10 (y, x, MPFR_RNDN); 72 MPFR_ASSERTN (mpfr_nan_p (y) && inex == 0); 73 74 /* check Inf */ 75 mpfr_set_inf (x, -1); 76 inex = test_log10 (y, x, MPFR_RNDN); 77 MPFR_ASSERTN (mpfr_nan_p (y) && inex == 0); 78 79 mpfr_set_inf (x, 1); 80 inex = test_log10 (y, x, MPFR_RNDN); 81 MPFR_ASSERTN (mpfr_inf_p (y) && mpfr_sgn (y) > 0 && inex == 0); 82 83 mpfr_set_ui (x, 0, MPFR_RNDN); 84 inex = test_log10 (x, x, MPFR_RNDN); 85 MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0); 86 mpfr_set_ui (x, 0, MPFR_RNDN); 87 mpfr_neg (x, x, MPFR_RNDN); 88 inex = test_log10 (x, x, MPFR_RNDN); 89 MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0); 90 91 /* check negative argument */ 92 mpfr_set_si (x, -1, MPFR_RNDN); 93 inex = test_log10 (y, x, MPFR_RNDN); 94 MPFR_ASSERTN (mpfr_nan_p (y) && inex == 0); 95 96 /* check log10(1) = 0 */ 97 mpfr_set_ui (x, 1, MPFR_RNDN); 98 inex = test_log10 (y, x, MPFR_RNDN); 99 MPFR_ASSERTN (mpfr_cmp_ui (y, 0) == 0 && MPFR_IS_POS (y) && inex == 0); 100 101 /* check log10(10^n)=n */ 102 mpfr_set_ui (x, 1, MPFR_RNDN); 103 for (n = 1; n <= 15; n++) 104 { 105 mpfr_mul_ui (x, x, 10, MPFR_RNDN); /* x = 10^n */ 106 inex = test_log10 (y, x, MPFR_RNDN); 107 if (mpfr_cmp_ui (y, n)) 108 { 109 printf ("log10(10^n) <> n for n=%u\n", n); 110 exit (1); 111 } 112 MPFR_ASSERTN (inex == 0); 113 } 114 115 mpfr_clear (x); 116 mpfr_clear (y); 117 118 data_check ("data/log10", mpfr_log10, "mpfr_log10"); 119 120 tests_end_mpfr (); 121 return 0; 122 } 123