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/* Split a double into fraction and mantissa, for hexadecimal printf.
Copyright (C) 2007, 2009-2019 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Write a finite, positive number x as
x = mantissa * 2^exp
where exp >= DBL_MIN_EXP - 1,
mantissa < 2.0,
if x is not a denormalized number then mantissa >= 1.0.
Store exp in *EXPPTR and return mantissa. */
extern double printf_frexp (double x, int *expptr);
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