1 /* Test file for mpfr_sec. 2 3 Copyright 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 #define TEST_FUNCTION mpfr_sec 29 #define REDUCE_EMAX 262143 /* otherwise arg. reduction is too expensive */ 30 #include "tgeneric.c" 31 32 static void 33 check_specials (void) 34 { 35 mpfr_t x, y; 36 37 mpfr_init2 (x, 123L); 38 mpfr_init2 (y, 123L); 39 40 mpfr_set_nan (x); 41 mpfr_sec (y, x, MPFR_RNDN); 42 if (! mpfr_nan_p (y)) 43 { 44 printf ("Error: sec(NaN) != NaN\n"); 45 exit (1); 46 } 47 48 mpfr_set_inf (x, 1); 49 mpfr_sec (y, x, MPFR_RNDN); 50 if (! mpfr_nan_p (y)) 51 { 52 printf ("Error: sec(Inf) != NaN\n"); 53 exit (1); 54 } 55 56 mpfr_set_inf (x, -1); 57 mpfr_sec (y, x, MPFR_RNDN); 58 if (! mpfr_nan_p (y)) 59 { 60 printf ("Error: sec(-Inf) != NaN\n"); 61 exit (1); 62 } 63 64 /* sec(+/-0) = 1 */ 65 mpfr_set_ui (x, 0, MPFR_RNDN); 66 mpfr_sec (y, x, MPFR_RNDN); 67 if (mpfr_cmp_ui (y, 1)) 68 { 69 printf ("Error: sec(+0) != 1\n"); 70 exit (1); 71 } 72 mpfr_neg (x, x, MPFR_RNDN); 73 mpfr_sec (y, x, MPFR_RNDN); 74 if (mpfr_cmp_ui (y, 1)) 75 { 76 printf ("Error: sec(-0) != 1\n"); 77 exit (1); 78 } 79 80 mpfr_clear (x); 81 mpfr_clear (y); 82 } 83 84 static void 85 overflowed_sec0 (void) 86 { 87 mpfr_t x, y; 88 int emax, i, inex, rnd, err = 0; 89 mpfr_exp_t old_emax; 90 91 old_emax = mpfr_get_emax (); 92 93 mpfr_init2 (x, 8); 94 mpfr_init2 (y, 8); 95 96 for (emax = -1; emax <= 0; emax++) 97 { 98 mpfr_set_ui_2exp (y, 1, emax, MPFR_RNDN); 99 mpfr_nextbelow (y); 100 set_emax (emax); /* 1 is not representable. */ 101 for (i = -1; i <= 1; i++) 102 RND_LOOP (rnd) 103 { 104 mpfr_set_si_2exp (x, i, -512 * ABS (i), MPFR_RNDN); 105 mpfr_clear_flags (); 106 inex = mpfr_sec (x, x, (mpfr_rnd_t) rnd); 107 if (! mpfr_overflow_p ()) 108 { 109 printf ("Error in overflowed_sec0 (i = %d, rnd = %s):\n" 110 " The overflow flag is not set.\n", 111 i, mpfr_print_rnd_mode ((mpfr_rnd_t) rnd)); 112 err = 1; 113 } 114 if (rnd == MPFR_RNDZ || rnd == MPFR_RNDD) 115 { 116 if (inex >= 0) 117 { 118 printf ("Error in overflowed_sec0 (i = %d, rnd = %s):\n" 119 " The inexact value must be negative.\n", 120 i, mpfr_print_rnd_mode ((mpfr_rnd_t) rnd)); 121 err = 1; 122 } 123 if (! mpfr_equal_p (x, y)) 124 { 125 printf ("Error in overflowed_sec0 (i = %d, rnd = %s):\n" 126 " Got ", i, mpfr_print_rnd_mode ((mpfr_rnd_t) rnd)); 127 mpfr_print_binary (x); 128 printf (" instead of 0.11111111E%d.\n", emax); 129 err = 1; 130 } 131 } 132 else 133 { 134 if (inex <= 0) 135 { 136 printf ("Error in overflowed_sec0 (i = %d, rnd = %s):\n" 137 " The inexact value must be positive.\n", 138 i, mpfr_print_rnd_mode ((mpfr_rnd_t) rnd)); 139 err = 1; 140 } 141 if (! (mpfr_inf_p (x) && MPFR_SIGN (x) > 0)) 142 { 143 printf ("Error in overflowed_sec0 (i = %d, rnd = %s):\n" 144 " Got ", i, mpfr_print_rnd_mode ((mpfr_rnd_t) rnd)); 145 mpfr_print_binary (x); 146 printf (" instead of +Inf.\n"); 147 err = 1; 148 } 149 } 150 } 151 set_emax (old_emax); 152 } 153 154 if (err) 155 exit (1); 156 mpfr_clear (x); 157 mpfr_clear (y); 158 } 159 160 int 161 main (int argc, char *argv[]) 162 { 163 tests_start_mpfr (); 164 165 check_specials (); 166 167 test_generic (2, 200, 10); 168 overflowed_sec0 (); 169 170 tests_end_mpfr (); 171 return 0; 172 } 173