1 /* Split a double into fraction and mantissa, for hexadecimal printf. 2 Copyright (C) 2007, 2009-2012 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 16 17 /* Write a finite, positive number x as 18 x = mantissa * 2^exp 19 where exp >= DBL_MIN_EXP - 1, 20 mantissa < 2.0, 21 if x is not a denormalized number then mantissa >= 1.0. 22 Store exp in *EXPPTR and return mantissa. */ 23 extern double printf_frexp (double x, int *expptr); 24
