Blame lib/printf-frexpl.h
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/* Split a 'long double' into fraction and mantissa, for hexadecimal printf.
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Copyright (C) 2007, 2009-2018 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Write a finite, positive number x as
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x = mantissa * 2^exp
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where exp >= LDBL_MIN_EXP - 1,
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mantissa < 2.0,
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if x is not a denormalized number then mantissa >= 1.0.
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Store exp in *EXPPTR and return mantissa. */
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extern long double printf_frexpl (long double x, int *expptr);
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