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/* Copyright © 2018, Keith Packard
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of the copyright holders nor the names of
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE. */
#ifndef _LDTOA_ENGINE_H_
#define _LDTOA_ENGINE_H_
#include <stdlib.h>
#include <stdint.h>
#include <float.h>
#include <stdbool.h>
#if __LDBL_MANT_DIG__ == 113
#define LDTOA_MAX_DIG 34
#elif __LDBL_MANT_DIG__ == 106
#define LDTOA_MAX_DIG 32
#elif __LDBL_MANT_DIG__ == 64
#define LDTOA_MAX_DIG 20
#endif
struct ldtoa {
int32_t exp;
uint8_t flags;
char digits[LDTOA_MAX_DIG + 1];
};
int
__ldtoa_engine(long double x, struct ldtoa *dtoa, int max_digits, bool fmode, int max_decimals);
/* '__ldtoa_engine' flags return value */
#define LDTOA_MINUS 1
#define LDTOA_ZERO 2
#define LDTOA_INF 4
#define LDTOA_NAN 8
#define LDTOA_CARRY 16 /* Carry was to most significant position. */
#endif /* !_LDTOA_ENGINE_H_ */
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