1/* Split a double into fraction and mantissa, for hexadecimal printf.
2 Copyright (C) 2007, 2009-2019 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 <https://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. */
23extern double printf_frexp (double x, int *expptr);
24