1 /* mpf_set_d -- Assign a float from a double. 2 3 Copyright 1993, 1994, 1995, 1996, 2001, 2003, 2004 Free Software Foundation, 4 Inc. 5 6 This file is part of the GNU MP Library. 7 8 The GNU MP 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 MP 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 MP Library. If not, see http://www.gnu.org/licenses/. */ 20 21 #include "config.h" 22 23 #if HAVE_FLOAT_H 24 #include <float.h> /* for DBL_MAX */ 25 #endif 26 27 #include "gmp.h" 28 #include "gmp-impl.h" 29 30 void 31 mpf_set_d (mpf_ptr r, double d) 32 { 33 int negative; 34 35 DOUBLE_NAN_INF_ACTION (d, 36 __gmp_invalid_operation (), 37 __gmp_invalid_operation ()); 38 39 if (UNLIKELY (d == 0)) 40 { 41 SIZ(r) = 0; 42 EXP(r) = 0; 43 return; 44 } 45 negative = d < 0; 46 d = ABS (d); 47 48 SIZ(r) = negative ? -LIMBS_PER_DOUBLE : LIMBS_PER_DOUBLE; 49 EXP(r) = __gmp_extract_double (PTR(r), d); 50 } 51