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|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_tools.hxx"
#include <math.h>
#include <tools/tools.h>
#include <tools/bigint.hxx>
#include <tools/string.hxx>
#include <tools/debug.hxx>
#include <string.h>
#include <ctype.h>
static const long MY_MAXLONG = 0x3fffffff;
static const long MY_MINLONG = -MY_MAXLONG;
static const long MY_MAXSHORT = 0x00007fff;
static const long MY_MINSHORT = -MY_MAXSHORT;
/* Die ganzen Algorithmen zur Addition, Subtraktion, Multiplikation und
* Division von langen Zahlen stammen aus SEMINUMERICAL ALGORITHMS von
* DONALD E. KNUTH aus der Reihe The Art of Computer Programming. Zu finden
* sind diese Algorithmen im Kapitel 4.3.1. The Classical Algorithms.
*/
// Muss auf UINT16/INT16/UINT32/INT32 umgestellt werden !!! W.P.
// -----------------------------------------------------------------------
void BigInt::MakeBigInt( const BigInt& rVal )
{
if ( rVal.bIsBig )
{
memcpy( (void*)this, (const void*)&rVal, sizeof( BigInt ) );
while ( nLen > 1 && nNum[nLen-1] == 0 )
nLen--;
}
else
{
long nTmp = rVal.nVal;
nVal = rVal.nVal;
bIsBig = sal_True;
if ( nTmp < 0 )
{
bIsNeg = sal_True;
nTmp = -nTmp;
}
else
bIsNeg = sal_False;
nNum[0] = (sal_uInt16)(nTmp & 0xffffL);
nNum[1] = (sal_uInt16)(nTmp >> 16);
if ( nTmp & 0xffff0000L )
nLen = 2;
else
nLen = 1;
}
}
// -----------------------------------------------------------------------
void BigInt::Normalize()
{
if ( bIsBig )
{
while ( nLen > 1 && nNum[nLen-1] == 0 )
nLen--;
if ( nLen < 3 )
{
if ( nLen < 2 )
nVal = nNum[0];
else if ( nNum[1] & 0x8000 )
return;
else
nVal = ((long)nNum[1] << 16) + nNum[0];
bIsBig = sal_False;
if ( bIsNeg )
nVal = -nVal;
}
// else ist nVal undefiniert !!! W.P.
}
// wozu, nLen ist doch undefiniert ??? W.P.
else if ( nVal & 0xFFFF0000L )
nLen = 2;
else
nLen = 1;
}
// -----------------------------------------------------------------------
void BigInt::Mult( const BigInt &rVal, sal_uInt16 nMul )
{
sal_uInt16 nK = 0;
for ( int i = 0; i < rVal.nLen; i++ )
{
sal_uInt32 nTmp = (sal_uInt32)rVal.nNum[i] * (sal_uInt32)nMul + nK;
nK = (sal_uInt16)(nTmp >> 16);
nNum[i] = (sal_uInt16)nTmp;
}
if ( nK )
{
nNum[rVal.nLen] = nK;
nLen = rVal.nLen + 1;
}
else
nLen = rVal.nLen;
bIsBig = sal_True;
bIsNeg = rVal.bIsNeg;
}
// -----------------------------------------------------------------------
void BigInt::Div( sal_uInt16 nDiv, sal_uInt16& rRem )
{
sal_uInt32 nK = 0;
for ( int i = nLen - 1; i >= 0; i-- )
{
sal_uInt32 nTmp = (sal_uInt32)nNum[i] + (nK << 16);
nNum[i] = (sal_uInt16)(nTmp / nDiv);
nK = nTmp % nDiv;
}
rRem = (sal_uInt16)nK;
if ( nNum[nLen-1] == 0 )
nLen -= 1;
}
// -----------------------------------------------------------------------
sal_Bool BigInt::IsLess( const BigInt& rVal ) const
{
if ( rVal.nLen < nLen)
return sal_True;
if ( rVal.nLen > nLen )
return sal_False;
int i;
for ( i = nLen - 1; i > 0 && nNum[i] == rVal.nNum[i]; i-- )
{
}
return rVal.nNum[i] < nNum[i];
}
// -----------------------------------------------------------------------
void BigInt::AddLong( BigInt& rB, BigInt& rErg )
{
if ( bIsNeg == rB.bIsNeg )
{
int i;
char len;
// wenn die Zahlen unterschiedlich lang sind, sollte zunaechst bei
// der kleineren Zahl die fehlenden Ziffern mit 0 initialisert werden
if (nLen >= rB.nLen)
{
len = nLen;
for (i = rB.nLen; i < len; i++)
rB.nNum[i] = 0;
}
else
{
len = rB.nLen;
for (i = nLen; i < len; i++)
nNum[i] = 0;
}
// Die Ziffern werden von hinten nach vorne addiert
long k;
long nZ = 0;
for (i = 0, k = 0; i < len; i++) {
nZ = (long)nNum[i] + (long)rB.nNum[i] + k;
if (nZ & 0xff0000L)
k = 1;
else
k = 0;
rErg.nNum[i] = (sal_uInt16)(nZ & 0xffffL);
}
// Trat nach der letzten Addition ein Ueberlauf auf, muss dieser
// noch ins Ergebis uebernommen werden
if (nZ & 0xff0000L) // oder if(k)
{
rErg.nNum[i] = 1;
len++;
}
// Die Laenge und das Vorzeichen setzen
rErg.nLen = len;
rErg.bIsNeg = bIsNeg && rB.bIsNeg;
rErg.bIsBig = sal_True;
}
// Wenn nur einer der beiden Operanten negativ ist, wird aus der
// Addition eine Subtaktion
else if (bIsNeg)
{
bIsNeg = sal_False;
rB.SubLong(*this, rErg);
bIsNeg = sal_True;
}
else
{
rB.bIsNeg = sal_False;
SubLong(rB, rErg);
rB.bIsNeg = sal_True;
}
}
// -----------------------------------------------------------------------
void BigInt::SubLong( BigInt& rB, BigInt& rErg )
{
if ( bIsNeg == rB.bIsNeg )
{
int i;
char len;
long nZ, k;
// wenn die Zahlen unterschiedlich lang sind, sollte zunaechst bei
// der kleineren Zahl die fehlenden Ziffern mit 0 initialisert werden
if (nLen >= rB.nLen)
{
len = nLen;
for (i = rB.nLen; i < len; i++)
rB.nNum[i] = 0;
}
else
{
len = rB.nLen;
for (i = nLen; i < len; i++)
nNum[i] = 0;
}
if ( IsLess(rB) )
{
for (i = 0, k = 0; i < len; i++)
{
nZ = (long)nNum[i] - (long)rB.nNum[i] + k;
if (nZ < 0)
k = -1;
else
k = 0;
rErg.nNum[i] = (sal_uInt16)(nZ & 0xffffL);
}
rErg.bIsNeg = bIsNeg;
}
else
{
for (i = 0, k = 0; i < len; i++)
{
nZ = (long)rB.nNum[i] - (long)nNum[i] + k;
if (nZ < 0)
k = -1;
else
k = 0;
rErg.nNum[i] = (sal_uInt16)(nZ & 0xffffL);
}
// wenn a < b, dann Vorzeichen vom Ergebnis umdrehen
rErg.bIsNeg = !bIsNeg;
}
rErg.nLen = len;
rErg.bIsBig = sal_True;
}
// Wenn nur einer der beiden Operanten negativ ist, wird aus der
// Subtaktion eine Addition
else if (bIsNeg)
{
bIsNeg = sal_False;
AddLong(rB, rErg);
bIsNeg = sal_True;
rErg.bIsNeg = sal_True;
}
else
{
rB.bIsNeg = sal_False;
AddLong(rB, rErg);
rB.bIsNeg = sal_True;
rErg.bIsNeg = sal_False;
}
}
// -----------------------------------------------------------------------
void BigInt::MultLong( const BigInt& rB, BigInt& rErg ) const
{
int i, j;
sal_uInt32 nZ, k;
rErg.bIsNeg = bIsNeg != rB.bIsNeg;
rErg.bIsBig = sal_True;
rErg.nLen = nLen + rB.nLen;
for (i = 0; i < rErg.nLen; i++)
rErg.nNum[i] = 0;
for (j = 0; j < rB.nLen; j++)
{
for (i = 0, k = 0; i < nLen; i++)
{
nZ = (sal_uInt32)nNum[i] * (sal_uInt32)rB.nNum[j] +
(sal_uInt32)rErg.nNum[i + j] + k;
rErg.nNum[i + j] = (sal_uInt16)(nZ & 0xffffUL);
k = nZ >> 16;
}
rErg.nNum[i + j] = (sal_uInt16)k;
}
}
// -----------------------------------------------------------------------
void BigInt::DivLong( const BigInt& rB, BigInt& rErg ) const
{
int i, j;
long nTmp;
sal_uInt16 nK, nQ, nMult;
short nLenB = rB.nLen;
short nLenB1 = rB.nLen - 1;
BigInt aTmpA, aTmpB;
nMult = (sal_uInt16)(0x10000L / ((long)rB.nNum[nLenB1] + 1));
aTmpA.Mult( *this, nMult );
if ( aTmpA.nLen == nLen )
{
aTmpA.nNum[aTmpA.nLen] = 0;
aTmpA.nLen++;
}
aTmpB.Mult( rB, nMult );
for (j = aTmpA.nLen - 1; j >= nLenB; j--)
{ // Raten des Divisors
nTmp = ( (long)aTmpA.nNum[j] << 16 ) + aTmpA.nNum[j - 1];
if (aTmpA.nNum[j] == aTmpB.nNum[nLenB1])
nQ = 0xFFFF;
else
nQ = (sal_uInt16)(((sal_uInt32)nTmp) / aTmpB.nNum[nLenB1]);
if ( ((sal_uInt32)aTmpB.nNum[nLenB1 - 1] * nQ) >
((((sal_uInt32)nTmp) - aTmpB.nNum[nLenB1] * nQ) << 16) + aTmpA.nNum[j - 2])
nQ--;
// Und hier faengt das Teilen an
nK = 0;
nTmp = 0;
for (i = 0; i < nLenB; i++)
{
nTmp = (long)aTmpA.nNum[j - nLenB + i]
- ((long)aTmpB.nNum[i] * nQ)
- nK;
aTmpA.nNum[j - nLenB + i] = (sal_uInt16)nTmp;
nK = (sal_uInt16) (nTmp >> 16);
if ( nK )
nK = (sal_uInt16)(0x10000UL - nK);
}
unsigned short& rNum( aTmpA.nNum[j - nLenB + i] );
rNum = rNum - nK; // MSVC yields a warning on -= here, so don't use it
if (aTmpA.nNum[j - nLenB + i] == 0)
rErg.nNum[j - nLenB] = nQ;
else
{
rErg.nNum[j - nLenB] = nQ - 1;
nK = 0;
for (i = 0; i < nLenB; i++)
{
nTmp = aTmpA.nNum[j - nLenB + i] + aTmpB.nNum[i] + nK;
aTmpA.nNum[j - nLenB + i] = (sal_uInt16)(nTmp & 0xFFFFL);
if (nTmp & 0xFFFF0000L)
nK = 1;
else
nK = 0;
}
}
}
rErg.bIsNeg = bIsNeg != rB.bIsNeg;
rErg.bIsBig = sal_True;
rErg.nLen = nLen - rB.nLen + 1;
}
// -----------------------------------------------------------------------
void BigInt::ModLong( const BigInt& rB, BigInt& rErg ) const
{
short i, j;
long nTmp;
sal_uInt16 nK, nQ, nMult;
short nLenB = rB.nLen;
short nLenB1 = rB.nLen - 1;
BigInt aTmpA, aTmpB;
nMult = (sal_uInt16)(0x10000L / ((long)rB.nNum[nLenB1] + 1));
aTmpA.Mult( *this, nMult);
if ( aTmpA.nLen == nLen )
{
aTmpA.nNum[aTmpA.nLen] = 0;
aTmpA.nLen++;
}
aTmpB.Mult( rB, nMult);
for (j = aTmpA.nLen - 1; j >= nLenB; j--)
{ // Raten des Divisors
nTmp = ( (long)aTmpA.nNum[j] << 16 ) + aTmpA.nNum[j - 1];
if (aTmpA.nNum[j] == aTmpB.nNum[nLenB1])
nQ = 0xFFFF;
else
nQ = (sal_uInt16)(((sal_uInt32)nTmp) / aTmpB.nNum[nLenB1]);
if ( ((sal_uInt32)aTmpB.nNum[nLenB1 - 1] * nQ) >
((((sal_uInt32)nTmp) - aTmpB.nNum[nLenB1] * nQ) << 16) + aTmpA.nNum[j - 2])
nQ--;
// Und hier faengt das Teilen an
nK = 0;
nTmp = 0;
for (i = 0; i < nLenB; i++)
{
nTmp = (long)aTmpA.nNum[j - nLenB + i]
- ((long)aTmpB.nNum[i] * nQ)
- nK;
aTmpA.nNum[j - nLenB + i] = (sal_uInt16)nTmp;
nK = (sal_uInt16) (nTmp >> 16);
if ( nK )
nK = (sal_uInt16)(0x10000UL - nK);
}
unsigned short& rNum( aTmpA.nNum[j - nLenB + i] );
rNum = rNum - nK;
if (aTmpA.nNum[j - nLenB + i] == 0)
rErg.nNum[j - nLenB] = nQ;
else
{
rErg.nNum[j - nLenB] = nQ - 1;
nK = 0;
for (i = 0; i < nLenB; i++) {
nTmp = aTmpA.nNum[j - nLenB + i] + aTmpB.nNum[i] + nK;
aTmpA.nNum[j - nLenB + i] = (sal_uInt16)(nTmp & 0xFFFFL);
if (nTmp & 0xFFFF0000L)
nK = 1;
else
nK = 0;
}
}
}
rErg = aTmpA;
rErg.Div( nMult, nQ );
}
// -----------------------------------------------------------------------
sal_Bool BigInt::ABS_IsLess( const BigInt& rB ) const
{
if (bIsBig || rB.bIsBig)
{
BigInt nA, nB;
nA.MakeBigInt( *this );
nB.MakeBigInt( rB );
if (nA.nLen == nB.nLen)
{
int i;
for (i = nA.nLen - 1; i > 0 && nA.nNum[i] == nB.nNum[i]; i--)
{
}
return nA.nNum[i] < nB.nNum[i];
}
else
return nA.nLen < nB.nLen;
}
if ( nVal < 0 )
if ( rB.nVal < 0 )
return nVal > rB.nVal;
else
return nVal > -rB.nVal;
else
if ( rB.nVal < 0 )
return nVal < -rB.nVal;
else
return nVal < rB.nVal;
}
// -----------------------------------------------------------------------
BigInt::BigInt( const BigInt& rBigInt )
{
if ( rBigInt.bIsBig )
memcpy( (void*)this, (const void*)&rBigInt, sizeof( BigInt ) );
else
{
bIsSet = rBigInt.bIsSet;
bIsBig = sal_False;
nVal = rBigInt.nVal;
}
}
// -----------------------------------------------------------------------
BigInt::BigInt( const ByteString& rString )
{
bIsSet = sal_True;
bIsNeg = sal_False;
bIsBig = sal_False;
nVal = 0;
sal_Bool bNeg = sal_False;
const sal_Char* p = rString.GetBuffer();
if ( *p == '-' )
{
bNeg = sal_True;
p++;
}
while( *p >= '0' && *p <= '9' )
{
*this *= 10;
*this += *p - '0';
p++;
}
if ( bIsBig )
bIsNeg = bNeg;
else if( bNeg )
nVal = -nVal;
}
// -----------------------------------------------------------------------
BigInt::BigInt( const UniString& rString )
{
bIsSet = sal_True;
bIsNeg = sal_False;
bIsBig = sal_False;
nVal = 0;
sal_Bool bNeg = sal_False;
const sal_Unicode* p = rString.GetBuffer();
if ( *p == '-' )
{
bNeg = sal_True;
p++;
}
while( *p >= '0' && *p <= '9' )
{
*this *= 10;
*this += *p - '0';
p++;
}
if ( bIsBig )
bIsNeg = bNeg;
else if( bNeg )
nVal = -nVal;
}
// -----------------------------------------------------------------------
BigInt::BigInt( double nValue )
{
bIsSet = sal_True;
if ( nValue < 0 )
{
nValue *= -1;
bIsNeg = sal_True;
}
else
{
bIsNeg = sal_False;
}
if ( nValue < 1 )
{
bIsBig = sal_False;
nVal = 0;
}
else
{
bIsBig = sal_True;
int i=0;
while ( ( nValue > 65536.0 ) && ( i < MAX_DIGITS ) )
{
nNum[i] = (sal_uInt16) fmod( nValue, 65536.0 );
nValue -= nNum[i];
nValue /= 65536.0;
i++;
}
if ( i < MAX_DIGITS )
nNum[i++] = (sal_uInt16) nValue;
nLen = i;
if ( i < 3 )
Normalize();
}
}
// -----------------------------------------------------------------------
BigInt::BigInt( sal_uInt32 nValue )
{
bIsSet = sal_True;
if ( nValue & 0x80000000UL )
{
bIsBig = sal_True;
bIsNeg = sal_False;
nNum[0] = (sal_uInt16)(nValue & 0xffffUL);
nNum[1] = (sal_uInt16)(nValue >> 16);
nLen = 2;
}
else
{
bIsBig = sal_False;
nVal = nValue;
}
}
// -----------------------------------------------------------------------
BigInt::operator ULONG() const
{
if ( !bIsBig )
return (sal_uInt32)nVal;
else if ( nLen == 2 )
{
sal_uInt32 nRet;
nRet = ((sal_uInt32)nNum[1]) << 16;
nRet += nNum[0];
return nRet;
}
return 0;
}
// -----------------------------------------------------------------------
BigInt::operator double() const
{
if ( !bIsBig )
return (double) nVal;
else
{
int i = nLen-1;
double nRet = (double) ((sal_uInt32)nNum[i]);
while ( i )
{
nRet *= 65536.0;
i--;
nRet += (double) ((sal_uInt32)nNum[i]);
}
if ( bIsNeg )
nRet *= -1;
return nRet;
}
}
// -----------------------------------------------------------------------
ByteString BigInt::GetByteString() const
{
ByteString aString;
if ( !bIsBig )
aString = ByteString::CreateFromInt32( nVal );
else
{
BigInt aTmp( *this );
BigInt a1000000000( 1000000000L );
aTmp.Abs();
do
{
BigInt a = aTmp;
a %= a1000000000;
aTmp /= a1000000000;
ByteString aStr = aString;
if ( a.nVal < 100000000L )
{ // leading 0s
aString = ByteString::CreateFromInt32( a.nVal + 1000000000L );
aString.Erase( 0, 1 );
}
else
aString = ByteString::CreateFromInt32( a.nVal );
aString += aStr;
}
while( aTmp.bIsBig );
ByteString aStr = aString;
if ( bIsNeg )
aString = ByteString::CreateFromInt32( -aTmp.nVal );
else
aString = ByteString::CreateFromInt32( aTmp.nVal );
aString += aStr;
}
return aString;
}
// -----------------------------------------------------------------------
UniString BigInt::GetString() const
{
UniString aString;
if ( !bIsBig )
aString = UniString::CreateFromInt32( nVal );
else
{
BigInt aTmp( *this );
BigInt a1000000000( 1000000000L );
aTmp.Abs();
do
{
BigInt a = aTmp;
a %= a1000000000;
aTmp /= a1000000000;
UniString aStr = aString;
if ( a.nVal < 100000000L )
{ // leading 0s
aString = UniString::CreateFromInt32( a.nVal + 1000000000L );
aString.Erase(0,1);
}
else
aString = UniString::CreateFromInt32( a.nVal );
aString += aStr;
}
while( aTmp.bIsBig );
UniString aStr = aString;
if ( bIsNeg )
aString = UniString::CreateFromInt32( -aTmp.nVal );
else
aString = UniString::CreateFromInt32( aTmp.nVal );
aString += aStr;
}
return aString;
}
// -----------------------------------------------------------------------
BigInt& BigInt::operator=( const BigInt& rBigInt )
{
if ( rBigInt.bIsBig )
memcpy( (void*)this, (const void*)&rBigInt, sizeof( BigInt ) );
else
{
bIsSet = rBigInt.bIsSet;
bIsBig = sal_False;
nVal = rBigInt.nVal;
}
return *this;
}
// -----------------------------------------------------------------------
BigInt& BigInt::operator+=( const BigInt& rVal )
{
if ( !bIsBig && !rVal.bIsBig )
{
if( nVal <= MY_MAXLONG && rVal.nVal <= MY_MAXLONG
&& nVal >= MY_MINLONG && rVal.nVal >= MY_MINLONG )
{ // wir bewegen uns im ungefaehrlichem Bereich
nVal += rVal.nVal;
return *this;
}
if( (nVal < 0) != (rVal.nVal < 0) )
{ // wir bewegen uns im ungefaehrlichem Bereich
nVal += rVal.nVal;
return *this;
}
}
BigInt aTmp1, aTmp2;
aTmp1.MakeBigInt( *this );
aTmp2.MakeBigInt( rVal );
aTmp1.AddLong( aTmp2, *this );
Normalize();
return *this;
}
// -----------------------------------------------------------------------
BigInt& BigInt::operator-=( const BigInt& rVal )
{
if ( !bIsBig && !rVal.bIsBig )
{
if ( nVal <= MY_MAXLONG && rVal.nVal <= MY_MAXLONG &&
nVal >= MY_MINLONG && rVal.nVal >= MY_MINLONG )
{ // wir bewegen uns im ungefaehrlichem Bereich
nVal -= rVal.nVal;
return *this;
}
if ( (nVal < 0) == (rVal.nVal < 0) )
{ // wir bewegen uns im ungefaehrlichem Bereich
nVal -= rVal.nVal;
return *this;
}
}
BigInt aTmp1, aTmp2;
aTmp1.MakeBigInt( *this );
aTmp2.MakeBigInt( rVal );
aTmp1.SubLong( aTmp2, *this );
Normalize();
return *this;
}
// -----------------------------------------------------------------------
BigInt& BigInt::operator*=( const BigInt& rVal )
{
if ( !bIsBig && !rVal.bIsBig
&& nVal <= MY_MAXSHORT && rVal.nVal <= MY_MAXSHORT
&& nVal >= MY_MINSHORT && rVal.nVal >= MY_MINSHORT )
// nicht optimal !!! W.P.
{ // wir bewegen uns im ungefaehrlichem Bereich
nVal *= rVal.nVal;
}
else
{
BigInt aTmp1, aTmp2;
aTmp1.MakeBigInt( rVal );
aTmp2.MakeBigInt( *this );
aTmp1.MultLong(aTmp2, *this);
Normalize();
}
return *this;
}
// -----------------------------------------------------------------------
BigInt& BigInt::operator/=( const BigInt& rVal )
{
if ( !rVal.bIsBig )
{
if ( rVal.nVal == 0 )
{
OSL_FAIL( "BigInt::operator/ --> divide by zero" );
return *this;
}
if ( !bIsBig )
{
// wir bewegen uns im ungefaehrlichem Bereich
nVal /= rVal.nVal;
return *this;
}
if ( rVal.nVal == 1 )
return *this;
if ( rVal.nVal == -1 )
{
bIsNeg = !bIsNeg;
return *this;
}
if ( rVal.nVal <= (long)0xFFFF && rVal.nVal >= -(long)0xFFFF )
{
// ein BigInt durch ein sal_uInt16 teilen
sal_uInt16 nTmp;
if ( rVal.nVal < 0 )
{
nTmp = (sal_uInt16) -rVal.nVal;
bIsNeg = !bIsNeg;
}
else
nTmp = (sal_uInt16) rVal.nVal;
Div( nTmp, nTmp );
Normalize();
return *this;
}
}
if ( ABS_IsLess( rVal ) )
{
*this = BigInt( (long)0 );
return *this;
}
// BigInt durch BigInt teilen
BigInt aTmp1, aTmp2;
aTmp1.MakeBigInt( *this );
aTmp2.MakeBigInt( rVal );
aTmp1.DivLong(aTmp2, *this);
Normalize();
return *this;
}
// -----------------------------------------------------------------------
void BigInt::DivMod( const BigInt& rVal, BigInt& rMod )
{
if ( !rVal.bIsBig )
{
if ( rVal.nVal == 0 )
{
OSL_FAIL( "BigInt::operator/ --> divide by zero" );
return;
}
if ( !bIsBig )
{
// wir bewegen uns im ungefaehrlichem Bereich
rMod = BigInt( nVal % rVal.nVal );
nVal /= rVal.nVal;
return;
}
if ( rVal.nVal == 1 )
{
rMod = BigInt( (long)0 );
return;
}
if ( rVal.nVal == -1 )
{
rMod = BigInt( (long)0 );
bIsNeg = !bIsNeg;
return;
}
if ( rVal.nVal <= (long)0xFFFF && rVal.nVal >= -(long)0xFFFF )
{
// ein BigInt durch ein sal_uInt16 teilen
sal_uInt16 nTmp;
if ( rVal.nVal < 0 )
{
nTmp = (sal_uInt16) -rVal.nVal;
bIsNeg = !bIsNeg;
}
else
nTmp = (sal_uInt16) rVal.nVal;
Div( nTmp, nTmp );
rMod = BigInt( (long)nTmp );
Normalize();
return;
}
}
if ( ABS_IsLess( rVal ) )
{
rMod = *this;
*this = BigInt( (long)0 );
return;
}
// BigInt durch BigInt teilen
BigInt aTmp1, aTmp2;
aTmp1.MakeBigInt( *this );
aTmp2.MakeBigInt( rVal );
aTmp1.DivLong(aTmp2, *this);
Normalize();
aTmp1.ModLong(aTmp2, rMod); // nicht optimal
rMod.Normalize();
}
// -----------------------------------------------------------------------
BigInt& BigInt::operator%=( const BigInt& rVal )
{
if ( !rVal.bIsBig )
{
if ( rVal.nVal == 0 )
{
OSL_FAIL( "BigInt::operator/ --> divide by zero" );
return *this;
}
if ( !bIsBig )
{
// wir bewegen uns im ungefaehrlichem Bereich
nVal %= rVal.nVal;
return *this;
}
if ( rVal.nVal <= (long)0xFFFF && rVal.nVal >= -(long)0xFFFF )
{
// ein BigInt durch ein short teilen
sal_uInt16 nTmp;
if ( rVal.nVal < 0 )
{
nTmp = (sal_uInt16) -rVal.nVal;
bIsNeg = !bIsNeg;
}
else
nTmp = (sal_uInt16) rVal.nVal;
Div( nTmp, nTmp );
*this = BigInt( (long)nTmp );
return *this;
}
}
if ( ABS_IsLess( rVal ) )
return *this;
// BigInt durch BigInt teilen
BigInt aTmp1, aTmp2;
aTmp1.MakeBigInt( *this );
aTmp2.MakeBigInt( rVal );
aTmp1.ModLong(aTmp2, *this);
Normalize();
return *this;
}
// -----------------------------------------------------------------------
sal_Bool operator==( const BigInt& rVal1, const BigInt& rVal2 )
{
if ( rVal1.bIsBig || rVal2.bIsBig )
{
BigInt nA, nB;
nA.MakeBigInt( rVal1 );
nB.MakeBigInt( rVal2 );
if ( nA.bIsNeg == nB.bIsNeg )
{
if ( nA.nLen == nB.nLen )
{
int i;
for ( i = nA.nLen - 1; i > 0 && nA.nNum[i] == nB.nNum[i]; i-- )
{
}
return nA.nNum[i] == nB.nNum[i];
}
return sal_False;
}
return sal_False;
}
return rVal1.nVal == rVal2.nVal;
}
// -----------------------------------------------------------------------
sal_Bool operator<( const BigInt& rVal1, const BigInt& rVal2 )
{
if ( rVal1.bIsBig || rVal2.bIsBig )
{
BigInt nA, nB;
nA.MakeBigInt( rVal1 );
nB.MakeBigInt( rVal2 );
if ( nA.bIsNeg == nB.bIsNeg )
{
if ( nA.nLen == nB.nLen )
{
int i;
for ( i = nA.nLen - 1; i > 0 && nA.nNum[i] == nB.nNum[i]; i-- )
{
}
if ( nA.bIsNeg )
return nA.nNum[i] > nB.nNum[i];
else
return nA.nNum[i] < nB.nNum[i];
}
if ( nA.bIsNeg )
return nA.nLen > nB.nLen;
else
return nA.nLen < nB.nLen;
}
return !nB.bIsNeg;
}
return rVal1.nVal < rVal2.nVal;
}
// -----------------------------------------------------------------------
sal_Bool operator >(const BigInt& rVal1, const BigInt& rVal2 )
{
if ( rVal1.bIsBig || rVal2.bIsBig )
{
BigInt nA, nB;
nA.MakeBigInt( rVal1 );
nB.MakeBigInt( rVal2 );
if ( nA.bIsNeg == nB.bIsNeg )
{
if ( nA.nLen == nB.nLen )
{
int i;
for ( i = nA.nLen - 1; i > 0 && nA.nNum[i] == nB.nNum[i]; i-- )
{
}
if ( nA.bIsNeg )
return nA.nNum[i] < nB.nNum[i];
else
return nA.nNum[i] > nB.nNum[i];
}
if ( nA.bIsNeg )
return nA.nLen < nB.nLen;
else
return nA.nLen > nB.nLen;
}
return !nA.bIsNeg;
}
return rVal1.nVal > rVal2.nVal;
}
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