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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_TOOLS_BIGINT_HXX
#define INCLUDED_TOOLS_BIGINT_HXX
#include <tools/toolsdllapi.h>
#include <tools/long.hxx>
#include <cassert>
#include <string_view>
#define MAX_DIGITS 8
class SAL_WARN_UNUSED TOOLS_DLLPUBLIC BigInt
{
private:
// we only use one of these two fields at a time
union {
sal_Int32 nVal;
sal_uInt16 nNum[MAX_DIGITS];
};
sal_uInt8 nLen : 5; // current length, if 0, data is in nVal, otherwise data is in nNum
bool bIsNeg : 1; // Is Sign negative?
TOOLS_DLLPRIVATE void MakeBigInt(BigInt const &);
TOOLS_DLLPRIVATE void Normalize();
TOOLS_DLLPRIVATE void Mult(BigInt const &, sal_uInt16);
TOOLS_DLLPRIVATE void Div(sal_uInt16, sal_uInt16 &);
TOOLS_DLLPRIVATE bool IsLess(BigInt const &) const;
TOOLS_DLLPRIVATE void AddLong(BigInt &, BigInt &);
TOOLS_DLLPRIVATE void SubLong(BigInt &, BigInt &);
TOOLS_DLLPRIVATE void MultLong(BigInt const &, BigInt &) const;
TOOLS_DLLPRIVATE void DivLong(BigInt const &, BigInt &) const;
TOOLS_DLLPRIVATE void ModLong(BigInt const &, BigInt &) const;
TOOLS_DLLPRIVATE bool ABS_IsLess(BigInt const &) const;
public:
BigInt()
: nVal(0)
, nLen(0)
, bIsNeg(false)
{
}
BigInt(sal_Int32 nValue)
: nVal(nValue)
, nLen(0)
, bIsNeg(false)
{
}
#if SAL_TYPES_SIZEOFLONG == 4
BigInt(int nValue)
: nVal(nValue)
, nLen(0)
, bIsNeg(false)
{
}
#endif
BigInt( double nVal );
BigInt( sal_uInt32 nVal );
BigInt( sal_Int64 nVal );
BigInt( const BigInt& rBigInt );
BigInt( std::u16string_view rString );
operator sal_Int16() const;
operator sal_uInt16() const;
operator sal_Int32() const;
operator sal_uInt32() const;
operator double() const;
#if SAL_TYPES_SIZEOFPOINTER == 8
operator tools::Long() const;
#endif
bool IsNeg() const;
bool IsZero() const;
bool IsLong() const { return nLen == 0; }
void Abs();
BigInt& operator =( const BigInt& rVal );
BigInt& operator +=( const BigInt& rVal );
BigInt& operator -=( const BigInt& rVal );
BigInt& operator *=( const BigInt& rVal );
BigInt& operator /=( const BigInt& rVal );
BigInt& operator %=( const BigInt& rVal );
BigInt& operator =( sal_Int32 nValue );
/* Scale and round value */
static tools::Long Scale(tools::Long nVal, tools::Long nMult, tools::Long nDiv);
friend inline BigInt operator +( const BigInt& rVal1, const BigInt& rVal2 );
friend inline BigInt operator -( const BigInt& rVal1, const BigInt& rVal2 );
friend inline BigInt operator *( const BigInt& rVal1, const BigInt& rVal2 );
friend inline BigInt operator /( const BigInt& rVal1, const BigInt& rVal2 );
friend inline BigInt operator %( const BigInt& rVal1, const BigInt& rVal2 );
TOOLS_DLLPUBLIC friend bool operator==( const BigInt& rVal1, const BigInt& rVal2 );
friend inline bool operator!=( const BigInt& rVal1, const BigInt& rVal2 );
TOOLS_DLLPUBLIC friend bool operator< ( const BigInt& rVal1, const BigInt& rVal2 );
friend inline bool operator> ( const BigInt& rVal1, const BigInt& rVal2 );
friend inline bool operator<=( const BigInt& rVal1, const BigInt& rVal2 );
friend inline bool operator>=( const BigInt& rVal1, const BigInt& rVal2 );
friend class Fraction;
};
inline BigInt::operator sal_Int16() const
{
if ( nLen == 0 && nVal >= SAL_MIN_INT16 && nVal <= SAL_MAX_INT16 )
return static_cast<sal_Int16>(nVal);
assert(false && "out of range");
return 0;
}
inline BigInt::operator sal_uInt16() const
{
if ( nLen == 0 && nVal >= 0 && nVal <= SAL_MAX_UINT16 )
return static_cast<sal_uInt16>(nVal);
assert(false && "out of range");
return 0;
}
inline BigInt::operator sal_Int32() const
{
if (nLen == 0)
return nVal;
assert(false && "out of range");
return 0;
}
inline BigInt::operator sal_uInt32() const
{
if ( nLen == 0 && nVal >= 0 )
return static_cast<sal_uInt32>(nVal);
assert(false && "out of range");
return 0;
}
#if SAL_TYPES_SIZEOFPOINTER == 8
inline BigInt::operator tools::Long() const
{
// Clamp to int32 since long is int32 on Windows.
if (nLen == 0)
return nVal;
assert(false && "out of range");
return 0;
}
#endif
inline BigInt& BigInt::operator =( sal_Int32 nValue )
{
nLen = 0;
nVal = nValue;
return *this;
}
inline bool BigInt::IsNeg() const
{
if ( nLen == 0 )
return (nVal < 0);
else
return bIsNeg;
}
inline bool BigInt::IsZero() const
{
if ( nLen != 0 )
return false;
else
return (nVal == 0);
}
inline void BigInt::Abs()
{
if ( nLen != 0 )
bIsNeg = false;
else if ( nVal < 0 )
nVal = -nVal;
}
inline BigInt operator+( const BigInt &rVal1, const BigInt &rVal2 )
{
BigInt aErg( rVal1 );
aErg += rVal2;
return aErg;
}
inline BigInt operator-( const BigInt &rVal1, const BigInt &rVal2 )
{
BigInt aErg( rVal1 );
aErg -= rVal2;
return aErg;
}
inline BigInt operator*( const BigInt &rVal1, const BigInt &rVal2 )
{
BigInt aErg( rVal1 );
aErg *= rVal2;
return aErg;
}
inline BigInt operator/( const BigInt &rVal1, const BigInt &rVal2 )
{
BigInt aErg( rVal1 );
aErg /= rVal2;
return aErg;
}
inline BigInt operator%( const BigInt &rVal1, const BigInt &rVal2 )
{
BigInt aErg( rVal1 );
aErg %= rVal2;
return aErg;
}
inline bool operator!=( const BigInt& rVal1, const BigInt& rVal2 )
{
return !(rVal1 == rVal2);
}
inline bool operator>(const BigInt& rVal1, const BigInt& rVal2) { return rVal2 < rVal1; }
inline bool operator<=( const BigInt& rVal1, const BigInt& rVal2 )
{
return !( rVal1 > rVal2);
}
inline bool operator>=( const BigInt& rVal1, const BigInt& rVal2 )
{
return !(rVal1 < rVal2);
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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