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comparison lib/printf-frexp.h @ 8240:536315dcb204

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New module 'printf-frexp'.
author Bruno Haible <bruno@clisp.org>
date Sun, 25 Feb 2007 14:20:46 +0000
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children bbbbbf4cd1c5
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8239:d31f3019f697 8240:536315dcb204
1 /* Split a double into fraction and mantissa, for hexadecimal printf.
2 Copyright (C) 2007 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 2, or (at your option)
7 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 along
15 with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
17
18 /* Write a finite, positive number x as
19 x = mantissa * 2^exp
20 where exp >= DBL_MIN_EXP - 1,
21 mantissa < 2.0,
22 if x is not a denormalized number then mantissa >= 1.0.
23 Store exp and return mantissa. */
24 extern double printf_frexp (double x, int *exp);