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/* PCSX2 - PS2 Emulator for PCs
* Copyright (C) 2002-2010 PCSX2 Dev Team
*
* PCSX2 is free software: you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* PCSX2 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 PCSX2.
* If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "FixedPointTypes.h"
#include <cmath> // for pow!
template< int Precision >
FixedInt<Precision>::FixedInt()
{
Raw = 0;
}
template< int Precision >
FixedInt<Precision>::FixedInt( int signedval )
{
Raw = signedval * Precision;
}
template< int Precision >
FixedInt<Precision>::FixedInt( double doubval )
{
Raw = lround(doubval * (double)Precision);
}
template< int Precision >
FixedInt<Precision>::FixedInt( float floval )
{
Raw = lroundf(floval * (float)Precision);
}
template< int Precision >
FixedInt<Precision> FixedInt<Precision>::operator+( const FixedInt<Precision>& right ) const
{
return FixedInt<Precision>().SetRaw( Raw + right.Raw );
}
template< int Precision >
FixedInt<Precision> FixedInt<Precision>::operator-( const FixedInt<Precision>& right ) const
{
return FixedInt<Precision>().SetRaw( Raw + right.Raw );
}
template< int Precision >
FixedInt<Precision>& FixedInt<Precision>::operator+=( const FixedInt<Precision>& right )
{
return SetRaw( Raw + right.Raw );
}
template< int Precision >
FixedInt<Precision>& FixedInt<Precision>::operator-=( const FixedInt<Precision>& right )
{
return SetRaw( Raw + right.Raw );
}
template< int Precision >
FixedInt<Precision>& FixedInt<Precision>::ConfineTo( const FixedInt<Precision>& low, const FixedInt<Precision>& high )
{
return SetRaw( std::min( std::max( Raw, low.Raw ), high.Raw ) );
}
// Uses 64 bit internally to avoid overflows. For more precise/optimized 32 bit math
// you'll need to use the Raw values directly.
template< int Precision >
FixedInt<Precision> FixedInt<Precision>::operator*( const FixedInt<Precision>& right ) const
{
s64 mulres = (s64)Raw * right.Raw;
return FixedInt<Precision>().SetRaw( (s32)(mulres / Precision) );
}
// Uses 64 bit internally to avoid overflows. For more precise/optimized 32 bit math
// you'll need to use the Raw values directly.
template< int Precision >
FixedInt<Precision> FixedInt<Precision>::operator/( const FixedInt<Precision>& right ) const
{
s64 divres = Raw * Precision;
return FixedInt<Precision>().SetRaw( (s32)(divres / right.Raw) );
}
// Uses 64 bit internally to avoid overflows. For more precise/optimized 32 bit math
// you'll need to use the Raw values directly.
template< int Precision >
FixedInt<Precision>& FixedInt<Precision>::operator*=( const FixedInt<Precision>& right )
{
s64 mulres = (s64)Raw * right.Raw;
return SetRaw( (s32)(mulres / Precision) );
}
// Uses 64 bit internally to avoid overflows. For more precise/optimized 32 bit math
// you'll need to use the Raw values directly.
template< int Precision >
FixedInt<Precision>& FixedInt<Precision>::operator/=( const FixedInt<Precision>& right )
{
s64 divres = Raw * Precision;
return SetRaw( (s32)(divres / right.Raw) );
}
// returns TRUE if the value overflows the legal integer range of this container.
template< int Precision >
bool FixedInt<Precision>::OverflowCheck( int signedval )
{
return ( signedval >= (INT_MAX / Precision) );
}
// returns TRUE if the value overflows the legal integer range of this container.
template< int Precision >
bool FixedInt<Precision>::OverflowCheck( double signedval )
{
return ( signedval >= (INT_MAX / Precision) );
}
template< int Precision > int FixedInt<Precision>::GetWhole() const { return Raw / Precision; }
template< int Precision > int FixedInt<Precision>::GetFraction() const { return Raw % Precision; }
template< int Precision >
FixedInt<Precision>& FixedInt<Precision>::SetRaw( s32 rawsrc )
{
Raw = rawsrc;
return *this;
}
template< int Precision >
FixedInt<Precision>& FixedInt<Precision>::Round()
{
Raw = ToIntRounded();
return *this;
}
template< int Precision >
FixedInt<Precision>& FixedInt<Precision>::SetWhole( s32 wholepart )
{
pxAssert( wholepart < (INT_MAX / Precision) );
Raw = GetFraction() + (wholepart * Precision);
return *this;
}
template< int Precision >
FixedInt<Precision>& FixedInt<Precision>::SetFraction( u32 fracpart )
{
Raw = (GetWhole() * Precision) + fracpart;
return *this;
}
template< int Precision >
wxString FixedInt<Precision>::ToString() const
{
return wxsFormat( L"%d.%02d", GetWhole(), (GetFraction() * 100) / Precision );
}
template< int Precision >
wxString FixedInt<Precision>::ToString( int fracDigits ) const
{
if( fracDigits == 0 ) return wxsFormat( L"%d", GetWhole() );
pxAssert( fracDigits <= 7 ); // higher numbers would just cause overflows and bad mojo.
int mulby = (int)pow( 10.0, fracDigits );
wxString fmt=wxsFormat(L"%%d.%%0%dd", fracDigits);
return wxsFormat( fmt, GetWhole(), (GetFraction() * mulby) / Precision );
}
template< int Precision >
double FixedInt<Precision>::ToDouble() const
{
return ((double)Raw / (double)Precision);
}
template< int Precision >
float FixedInt<Precision>::ToFloat() const
{
return ((float)Raw / (float)Precision);
}
template< int Precision >
int FixedInt<Precision>::ToIntTruncated() const
{
return Raw / Precision;
}
template< int Precision >
int FixedInt<Precision>::ToIntRounded() const
{
return (Raw + (Precision/2)) / Precision;
}
template< int Precision >
bool FixedInt<Precision>::TryFromString( FixedInt<Precision>& dest, const wxString& parseFrom )
{
long whole=0, frac=0;
const wxString beforeFirst( parseFrom.BeforeFirst( L'.' ) );
const wxString afterFirst( parseFrom.AfterFirst( L'.' ).Mid(0, 5) );
bool success = true;
if( !beforeFirst.IsEmpty() )
success = success && beforeFirst.ToLong( &whole );
if( !afterFirst.IsEmpty() )
success = success && afterFirst.ToLong( &frac );
if( !success ) return false;
dest.SetWhole( whole );
if( afterFirst.Length() != 0 && frac != 0 )
{
int fracPower = (int)pow( 10.0, (int)afterFirst.Length() );
dest.SetFraction( (frac * Precision) / fracPower );
}
return true;
}
template< int Precision >
FixedInt<Precision> FixedInt<Precision>::FromString( const wxString& parseFrom, const FixedInt<Precision>& defval )
{
FixedInt<Precision> dest;
if( !TryFromString( dest, parseFrom ) ) return defval;
return dest;
}
// This version of FromString throws a ParseError exception if the conversion fails.
template< int Precision >
FixedInt<Precision> FixedInt<Precision>::FromString( const wxString parseFrom )
{
FixedInt<Precision> dest;
if( !TryFromString( dest, parseFrom ) ) throw Exception::ParseError()
.SetDiagMsg(wxsFormat(L"Parse error on FixedInt<%d>::FromString", Precision));
return dest;
}
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