adapter128.cpp File Reference

Implementation of adapters for 128 bit versions of standard functions. More...

#include <string>
#include <charconv>
#include <cstdlib>
#include <quadmath.h>
#include <gmp.h>
#include "algo.h"
#include "dbc.h"
#include "helper.h"
#include "adapter128.h"
#include "error.h"

Include dependency graph for adapter128.cpp:

Functions
string	int128_to_string (const __int128 p_z)
	We need an adapter function, because __int128 isn't supported by std::to_string().
string	float128_to_string (__float128 p_float, size_t p_precision)
	We need an adapter function, because __float128 isn't supported by std::to_string().
__int128	string_to_int128 (const string &p_s)
	We need an adapter function, because __int128 isn't supported by the standard library.
__float128	string_to_float128 (const string &p_s)
	We need an adapter function, because __float128 isn't supported by the standard library.
bool	mpz_t_to___int128 (__int128 &p_dst, const mpz_t p_src)
	Converts a mpz_t into an __int128.
void	__int128_to_mpz_t (mpz_t p_dst, __int128 p_src)
	Converts an __int128 into a mpz_t.
void	__float128_to_mpf_t (mpf_t p_dst, __float128 p_f128)
	Converts a __float128 to a mpf_t, since GMP doesn't support 128 Bit floats directly.

Detailed Description

Implementation of adapters for 128 bit versions of standard functions.

Copyright

  Leonardus, a minimalist stack-based programming system.
  Copyright (C) 2025  Andreas Muckenschnabel
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/.

Function Documentation

__float128_to_mpf_t()

void __float128_to_mpf_t	(	mpf_t	p_dst,
		__float128	p_f128
	)

Converts a __float128 to a mpf_t, since GMP doesn't support 128 Bit floats directly.

Parameters

[out]	p_dst	... destination mpf_t
[in]	p_f128	... source __float128

float128_to_string()

string float128_to_string	(	__float128	p_float,
		size_t	p_precision
	)

We need an adapter function, because __float128 isn't supported by std::to_string().

Implementation with GNU quadmath.

Returns

std::string ... the string-representation of p_float

int128_to_string()

string int128_to_string

(

__int128

p_z

)

We need an adapter function, because __int128 isn't supported by std::to_string().

Parameters

[in]

p_z

we need a representation for this integer

Returns

std::string the string-representation of p_z

mpz_t_to___int128()

bool mpz_t_to___int128	(	__int128 &	p_dst,
		const mpz_t	p_src
	)

Converts a mpz_t into an __int128.

Returns

bool ... true if mpz_t fits into 128 bit integer

string_to_float128()

__float128 string_to_float128

(

const std::string &

p_s

)

We need an adapter function, because __float128 isn't supported by the standard library.

Implemented with GNU quadmath.

Parameters

[in]

p_s

contains a string representation as described in the POSIX strtof() function.

Returns

__float128 the IEEE float

string_to_int128()

__int128 string_to_int128

(

const std::string &

p_s

)

We need an adapter function, because __int128 isn't supported by the standard library.

Precondition

p_s format is: [-][digit]+

MIN_INT <= integer interpretation <= MAX_INT

Returns

__int128 ... the integer interpretation