rm_/lib/printf-frexpl.h
2022-07-28 14:16:50 +08:00

24 lines
1.1 KiB
C

/* Split a 'long double' into fraction and mantissa, for hexadecimal printf.
Copyright (C) 2007, 2009-2022 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser 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 >= LDBL_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 long double printf_frexpl (long double x, int *expptr);