33b8f7c10b
we can just use nLen != 0 to get the same information Change-Id: I2406322aa8b7cfc5e276818df763c6de08397454 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/108834 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
253 lines
6.9 KiB
C++
253 lines
6.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_TOOLS_BIGINT_HXX
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#define INCLUDED_TOOLS_BIGINT_HXX
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#include <rtl/ustring.hxx>
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#include <tools/toolsdllapi.h>
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#include <tools/long.hxx>
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#define MAX_DIGITS 8
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class SAL_WARN_UNUSED TOOLS_DLLPUBLIC BigInt
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{
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private:
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// we only use one of these two fields at a time
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union {
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sal_Int32 nVal;
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sal_uInt16 nNum[MAX_DIGITS];
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};
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sal_uInt8 nLen : 5; // current length, if 0, data is in nVal, otherwise data is in nNum
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bool bIsNeg : 1; // Is Sign negative?
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TOOLS_DLLPRIVATE void MakeBigInt(BigInt const &);
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TOOLS_DLLPRIVATE void Normalize();
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TOOLS_DLLPRIVATE void Mult(BigInt const &, sal_uInt16);
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TOOLS_DLLPRIVATE void Div(sal_uInt16, sal_uInt16 &);
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TOOLS_DLLPRIVATE bool IsLess(BigInt const &) const;
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TOOLS_DLLPRIVATE void AddLong(BigInt &, BigInt &);
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TOOLS_DLLPRIVATE void SubLong(BigInt &, BigInt &);
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TOOLS_DLLPRIVATE void MultLong(BigInt const &, BigInt &) const;
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TOOLS_DLLPRIVATE void DivLong(BigInt const &, BigInt &) const;
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TOOLS_DLLPRIVATE void ModLong(BigInt const &, BigInt &) const;
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TOOLS_DLLPRIVATE bool ABS_IsLess(BigInt const &) const;
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public:
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BigInt()
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: nVal(0)
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, nLen(0)
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, bIsNeg(false)
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{
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}
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BigInt(sal_Int32 nValue)
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: nVal(nValue)
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, nLen(0)
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, bIsNeg(false)
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{
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}
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#if SAL_TYPES_SIZEOFLONG == 4
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BigInt(int nValue)
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: nVal(nValue)
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, nLen(0)
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, bIsNeg(false)
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{
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}
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#endif
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BigInt( double nVal );
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BigInt( sal_uInt32 nVal );
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BigInt( sal_Int64 nVal );
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BigInt( const BigInt& rBigInt );
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BigInt( const OUString& rString );
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operator sal_Int16() const;
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operator sal_uInt16() const;
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operator sal_Int32() const;
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operator sal_uInt32() const;
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operator double() const;
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#if SAL_TYPES_SIZEOFPOINTER == 8
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operator tools::Long() const;
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#endif
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bool IsNeg() const;
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bool IsZero() const;
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bool IsLong() const { return nLen == 0; }
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void Abs();
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BigInt& operator =( const BigInt& rVal );
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BigInt& operator +=( const BigInt& rVal );
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BigInt& operator -=( const BigInt& rVal );
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BigInt& operator *=( const BigInt& rVal );
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BigInt& operator /=( const BigInt& rVal );
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BigInt& operator %=( const BigInt& rVal );
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BigInt& operator =( sal_Int32 nValue );
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/* Scale and round value */
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static tools::Long Scale(tools::Long nVal, tools::Long nMult, tools::Long nDiv);
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friend inline BigInt operator +( const BigInt& rVal1, const BigInt& rVal2 );
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friend inline BigInt operator -( const BigInt& rVal1, const BigInt& rVal2 );
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friend inline BigInt operator *( const BigInt& rVal1, const BigInt& rVal2 );
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friend inline BigInt operator /( const BigInt& rVal1, const BigInt& rVal2 );
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friend inline BigInt operator %( const BigInt& rVal1, const BigInt& rVal2 );
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TOOLS_DLLPUBLIC friend bool operator==( const BigInt& rVal1, const BigInt& rVal2 );
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friend inline bool operator!=( const BigInt& rVal1, const BigInt& rVal2 );
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TOOLS_DLLPUBLIC friend bool operator< ( const BigInt& rVal1, const BigInt& rVal2 );
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friend inline bool operator> ( const BigInt& rVal1, const BigInt& rVal2 );
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friend inline bool operator<=( const BigInt& rVal1, const BigInt& rVal2 );
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friend inline bool operator>=( const BigInt& rVal1, const BigInt& rVal2 );
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friend class Fraction;
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};
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inline BigInt::operator sal_Int16() const
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{
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if ( nLen == 0 && nVal >= SAL_MIN_INT16 && nVal <= SAL_MAX_INT16 )
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return static_cast<sal_Int16>(nVal);
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assert(false && "out of range");
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return 0;
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}
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inline BigInt::operator sal_uInt16() const
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{
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if ( nLen == 0 && nVal >= 0 && nVal <= SAL_MAX_UINT16 )
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return static_cast<sal_uInt16>(nVal);
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assert(false && "out of range");
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return 0;
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}
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inline BigInt::operator sal_Int32() const
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{
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if (nLen == 0)
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return nVal;
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assert(false && "out of range");
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return 0;
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}
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inline BigInt::operator sal_uInt32() const
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{
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if ( nLen == 0 && nVal >= 0 )
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return static_cast<sal_uInt32>(nVal);
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assert(false && "out of range");
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return 0;
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}
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#if SAL_TYPES_SIZEOFPOINTER == 8
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inline BigInt::operator tools::Long() const
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{
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// Clamp to int32 since long is int32 on Windows.
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if (nLen == 0)
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return nVal;
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assert(false && "out of range");
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return 0;
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}
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#endif
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inline BigInt& BigInt::operator =( sal_Int32 nValue )
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{
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nLen = 0;
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nVal = nValue;
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return *this;
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}
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inline bool BigInt::IsNeg() const
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{
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if ( nLen == 0 )
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return (nVal < 0);
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else
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return bIsNeg;
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}
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inline bool BigInt::IsZero() const
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{
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if ( nLen != 0 )
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return false;
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else
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return (nVal == 0);
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}
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inline void BigInt::Abs()
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{
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if ( nLen != 0 )
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bIsNeg = false;
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else if ( nVal < 0 )
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nVal = -nVal;
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}
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inline BigInt operator+( const BigInt &rVal1, const BigInt &rVal2 )
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{
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BigInt aErg( rVal1 );
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aErg += rVal2;
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return aErg;
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}
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inline BigInt operator-( const BigInt &rVal1, const BigInt &rVal2 )
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{
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BigInt aErg( rVal1 );
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aErg -= rVal2;
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return aErg;
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}
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inline BigInt operator*( const BigInt &rVal1, const BigInt &rVal2 )
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{
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BigInt aErg( rVal1 );
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aErg *= rVal2;
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return aErg;
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}
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inline BigInt operator/( const BigInt &rVal1, const BigInt &rVal2 )
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{
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BigInt aErg( rVal1 );
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aErg /= rVal2;
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return aErg;
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}
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inline BigInt operator%( const BigInt &rVal1, const BigInt &rVal2 )
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{
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BigInt aErg( rVal1 );
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aErg %= rVal2;
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return aErg;
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}
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inline bool operator!=( const BigInt& rVal1, const BigInt& rVal2 )
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{
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return !(rVal1 == rVal2);
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}
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inline bool operator>(const BigInt& rVal1, const BigInt& rVal2) { return rVal2 < rVal1; }
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inline bool operator<=( const BigInt& rVal1, const BigInt& rVal2 )
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{
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return !( rVal1 > rVal2);
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}
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inline bool operator>=( const BigInt& rVal1, const BigInt& rVal2 )
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{
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return !(rVal1 < rVal2);
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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