1 /* Test file for mpfr_const_euler. 2 3 Copyright 2001-2018 Free Software Foundation, Inc. 4 Contributed by the AriC and Caramba 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 "mpfr-test.h" 24 25 /* Wrapper for tgeneric */ 26 static int 27 my_const_euler (mpfr_ptr x, mpfr_srcptr y, mpfr_rnd_t r) 28 { 29 return mpfr_const_euler (x, r); 30 } 31 32 #define RAND_FUNCTION(x) mpfr_set_ui ((x), 0, MPFR_RNDN) 33 #define TEST_FUNCTION my_const_euler 34 #include "tgeneric.c" 35 36 int 37 main (int argc, char *argv[]) 38 { 39 mpfr_t gamma, y, z, t; 40 unsigned int err, prec, yprec, p0 = 2, p1 = 200; 41 int rnd; 42 43 tests_start_mpfr (); 44 45 prec = (argc < 2) ? 53 : atoi(argv[1]); 46 47 if (argc > 1) 48 { 49 mpfr_init2 (gamma, prec); 50 mpfr_const_euler (gamma, MPFR_RNDN); 51 printf("gamma="); mpfr_out_str (stdout, 10, 0, gamma, MPFR_RNDD); 52 puts (""); 53 mpfr_clear (gamma); 54 return 0; 55 } 56 57 mpfr_init (y); 58 mpfr_init (z); 59 mpfr_init (t); 60 61 mpfr_set_prec (y, 32); 62 mpfr_set_prec (z, 32); 63 (mpfr_const_euler) (y, MPFR_RNDN); 64 mpfr_set_str_binary (z, "0.10010011110001000110011111100011"); 65 if (mpfr_cmp (y, z)) 66 { 67 printf ("Error for prec=32\n"); 68 exit (1); 69 } 70 71 for (prec = p0; prec <= p1; prec++) 72 { 73 mpfr_set_prec (z, prec); 74 mpfr_set_prec (t, prec); 75 yprec = prec + 10; 76 77 RND_LOOP_NO_RNDF (rnd) 78 { 79 mpfr_set_prec (y, yprec); 80 mpfr_const_euler (y, (mpfr_rnd_t) rnd); 81 err = (rnd == MPFR_RNDN) ? yprec + 1 : yprec; 82 /* Note: for rnd = RNDF, rnd1 = RNDF is equivalent to rnd1 = RNDN 83 in mpfr_can_round, thus rnd2 = RNDF reduces to rnd2 = RNDN in that 84 case, we are duplicating the test for rnd = RNDN. */ 85 if (mpfr_can_round (y, err, (mpfr_rnd_t) rnd, (mpfr_rnd_t) rnd, prec)) 86 { 87 mpfr_set (t, y, (mpfr_rnd_t) rnd); 88 mpfr_const_euler (z, (mpfr_rnd_t) rnd); 89 if (mpfr_cmp (t, z)) 90 { 91 printf ("results differ for prec=%u rnd_mode=%s\n", prec, 92 mpfr_print_rnd_mode ((mpfr_rnd_t) rnd)); 93 printf (" got "); 94 mpfr_out_str (stdout, 2, prec, z, MPFR_RNDN); 95 puts (""); 96 printf (" expected "); 97 mpfr_out_str (stdout, 2, prec, t, MPFR_RNDN); 98 puts (""); 99 printf (" approximation was "); 100 mpfr_dump (y); 101 exit (1); 102 } 103 } 104 } 105 } 106 107 mpfr_clear (y); 108 mpfr_clear (z); 109 mpfr_clear (t); 110 111 test_generic (MPFR_PREC_MIN, 200, 1); 112 113 tests_end_mpfr (); 114 return 0; 115 } 116