fixed24.cpp

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// $Id: fixed24.cpp 1282 2006-06-09 09:46:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
       Copyright on certain contributions may be held in joint with their
              respective authors. See AUTHORS file for details.

LICENSE TO USE AND MODIFY SOFTWARE
----------------------------------

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Xara LX is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License version 2 as published
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-----------------

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----------------

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 */


/*
*/ 

// Stardate 070494.10:25. Captain's Log - supplementary
// ====================================================
//
//      Pirated fixed16 code to base fixed24 upon
//      This was from revision 1.24 of fixed16.cpp
//                                                Jason



#include "camtypes.h"
//#include "fixed24.h" - in camtypes.h [AUTOMATICALLY REMOVED]

// this is a temporary kludge for the 32-bit MS compiler
#define F24ASSIGN( it )     it
#define F24ASSIGNTHIS       *this

// this is one as a fixed24 as a longword
const INT32 FIXED24_ONE = 0x01000000L;


#ifdef FULL_FIXED24
// the following functions are untouched copies from fixed16.cpp
// if you want them, you'll have to convert them to handle FIXED24's
// I've also removed the '>' from the help comments to avoid them being
// compiled into Camelot help

/********************************************************************************************

    static LPTCHAR LongToStringFormat( LPTCHAR p, INT32 value, BOOL leading, BOOL trailing)

    Author:     Andy_Pennell (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/8/93
    Inputs:     Pointer to result, INT32 value and flags for leading & trailing spaces
    Outputs:    Buffer contains up to 5 digits of result
    Returns:    Returns the updated result pointer
    Purpose:    Converts low-value INT32s into decimal strings, either ASCII or Unicode
                depending on the size of TCHAR. value must be in range 0-999999 inclusive.
    Errors:     None.

********************************************************************************************/
/* Technical Note
    As the value can exceed 16-bits a little bit (99,999 is bigger than 65535) all calculations
    have to be done using INT32s. This is only a performance problem on 16-bit platforms, so it
    doesn't matter
*/

static LPTCHAR LongToStringFormat( LPTCHAR p, INT32 value, BOOL leading, BOOL trailing)
{
    INT32 digits = 5;
    INT32 tens = 10000L;

    while (--digits)
    {
        if (value >= tens)
        {
            // we need to output a non-zero digit

            *p++ = (TCHAR) ( TEXT('0') + (INT32)(value/tens) );
            value = value % tens;
        }
        else if (leading)
        {
            *p++ = TEXT('0');
        }
        // stop if zero result and no trailing zeros required
        if ( (value==0L) && (!trailing) )
            break;
        tens /= 10L;                                    // reduce divisor by 10
    }

    // final digit easy
    *p++ = (TCHAR) ( TEXT('0') + (INT32)value );

    // return next character
    return p;
}

/********************************************************************************************

    String FIXED16::ToString() const 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com>
    Created:    2/6/93 - rewritten in C 12/8/93 by Andy
    Inputs:     None.
    Outputs:    None
    Returns:    Returns a string representing the value of a FIXED16. Optional - sign, up
                to five digits of integer, then option period and five fractional digits
                then zero terminator (max 13 character result)
    Purpose:    Converts value of FIXED16 into a string representing it. The string will be
                ASCII or Unicode depending on the size of TCHAR
    Errors:     None.

********************************************************************************************/

void fixed16::ToString(String* out) const
{
    TCHAR s[13];
    LPTCHAR p = s;
    INT32 value = this->all;

    if (value < 0L)
    {
        *p++ = TEXT('-');                               // negative values start with a -
        value = -value;                                 // ensure result positive
    }

    // integer part: no leading zeros, trailing zeros

    p = LongToStringFormat( p, value >> F16SHIFT, FALSE, FALSE);

    value &= 0xFFFF;                                    // get fractional part

    if (value)
    {
        *p++ = TEXT('.');                               // decimal point needed
        value = MulDiv32By32( value, 100000L, 65536L);  // convert fractional part into INT32

        // factional part: leading zeros, no trailing
        p = LongToStringFormat( p, value, TRUE, FALSE );
    }

    *p = (TCHAR)0;                                      // null terminate
    
    *out = s;                                           // convert to proper String
}
#endif      // FULL_FIXED24




// Friend Functions - Basic Operators

/********************************************************************************************

>   FIXED24 operator+ (const FIXED24& operand1, const FIXED24& operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Friend:     FIXED24
    Inputs:     Two values to be added together.
    Outputs:    None.
    Returns:    A FIXED24 with result of addition.
    Purpose:    Overloading the addition operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24 operator+ (const fixed24& operand1, const fixed24& operand2)
{
    fixed24 result;
                  
    result.all = operand1.all + operand2.all;
                  
    return result;
}

/********************************************************************************************

>   FIXED24 operator- (const FIXED24& operand1, const FIXED24& operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Friend:     FIXED24
    Inputs:     Two values to be subtracted from each other.
    Outputs:    None.
    Returns:    A FIXED24 with result of subtraction.
    Purpose:    Overloading the subtract operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24 operator- (const fixed24& operand1, const fixed24& operand2)
{
    fixed24 result;
                  
    result.all = operand1.all - operand2.all;
                  
    return result;
}

/********************************************************************************************

>   FIXED24 operator- (const FIXED24& operand1)

    Author:     Andy_Pennell (Xara Group Ltd) <camelotdev@xara.com>
    Created:    30/5/93
    Friend:     FIXED24
    Inputs:     A value to be negated.
    Outputs:    None.
    Returns:    A FIXED24 with result of negation.
    Purpose:    Overloading the negation operator for FIXED24s. Should be inline.
    Errors:     None.

********************************************************************************************/

fixed24 operator- (const fixed24& operand)
{
    fixed24 temp;

    temp.all = -operand.all;

    return temp;
}

/********************************************************************************************

>   FIXED24 operator* (const FIXED24& operand1, const FIXED24& operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    SeeAlso:    Fixed24Mul().
    Friend:     FIXED24
    Inputs:     Two values to be multiplied togther.
    Outputs:    None.
    Returns:    A FIXED24 with result of multiplication.
    Purpose:    Overloading the multiplication operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24 operator* (const fixed24& operand1, const fixed24& operand2)
{
    fixed24 result;
                  
    F24ASSIGN(result) = Fixed24Mul( operand1, operand2 );

    return result;
}

/********************************************************************************************

>   FIXED24 operator/ (const FIXED24& operand1, const FIXED24& operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    SeeAlso:    Fixed24Div().
    Friend:     FIXED24
    Inputs:     Two values to be divided.
    Outputs:    None.
    Returns:    A FIXED24 with result of division.
    Purpose:    Overloading the division operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24 operator/ (const fixed24& operand1, const fixed24& operand2)
{
    fixed24 result;
                  
    F24ASSIGN(result) = Fixed24Div( operand1, operand2 );

    return result;

}

/********************************************************************************************

>   FIXED24& operator>> (const FIXED24& operand1, UINT32 operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Friend:     FIXED24
    Inputs:     operand1 - value to be shifted.
                operand2 - shift count.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of ASR.
    Purpose:    Overloading the >> operator to mean shift right for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24 operator>> (const fixed24& operand1, UINT32 operand2)
{
    fixed24 result;
    
    result.all = operand1.all >> operand2;
    
    return result;
}

/********************************************************************************************

>   FIXED24 operator>> (const FIXED24& operand1, UINT32 operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Friend:     FIXED24
    Inputs:     operand1 - value to be shifted.
                operand2 - shift count.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of ASL.
    Purpose:    Overloading the << operator to mean shift left for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24 operator<< (const fixed24& operand1, UINT32 operand2)
{
    fixed24 result;
    
    result.all = operand1.all << operand2;
    
    return result;
}

// Relational operators

/********************************************************************************************

>   INT32 operator== (const FIXED24& operand1, const FIXED24& operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    5/5/93
    Friend:     FIXED24
    Inputs:     Two FIXED24s to be compared.
    Outputs:    None.
    Returns:    0 - False
                1 - True
    Purpose:    Overloading the equality operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

INT32 operator== (const fixed24& operand1, const fixed24& operand2) 
{
    return operand1.all == operand2.all;
}

/********************************************************************************************

>   INT32 operator== (const FIXED24& operand1, const short operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    2/6/93
    Friend:     FIXED24
    Inputs:     FIXED24
                INT8
    Outputs:    None.
    Returns:    0 - False
                1 - True
    Purpose:    Overloading the equality operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

INT32 operator== (const fixed24& operand1, const short operand2) 
{
    return operand1.all == SHORT_FIXED24( operand2 );
}

/********************************************************************************************

>   INT32 operator!= (const FIXED24& operand1, const FIXED24& operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    5/5/93
    Friend:     FIXED24
    Inputs:     Two FIXED24s to be compared.
    Outputs:    None.
    Returns:    0 - False
                1 - True
    Purpose:    Overloading the inequality operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

INT32 operator!= (const fixed24& operand1, const fixed24& operand2) 
{
    return operand1.all != operand2.all;
}

/********************************************************************************************

>   INT32 operator!= (const FIXED24& operand1, const short operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    5/5/93
    Friend:     FIXED24
    Inputs:     FIXED24
                short
    Outputs:    None.
    Returns:    0 - False
                1 - True
    Purpose:    Overloading the inequality operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

INT32 operator!= (const fixed24& operand1, const short operand2) 
{
    return operand1.all != SHORT_FIXED24( operand2 );
}

/********************************************************************************************

>   INT32 operator> (const FIXED24& operand1, const FIXED24& operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    5/5/93
    Friend:     FIXED24
    Inputs:     Two FIXED24s to be compared.
    Outputs:    None.
    Returns:    0 - False
                1 - True
    Purpose:    Overloading the greater-than operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

INT32 operator> (const fixed24& operand1, const fixed24& operand2) 
{
    return operand1.all > operand2.all;
}

/********************************************************************************************

>   INT32 operator> (const FIXED24& operand1, const short operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    5/5/93
    Friend:     FIXED24
    Inputs:     FIXED24
                short
    Outputs:    None.
    Returns:    0 - False
                1 - True
    Purpose:    Overloading the greater-than operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

INT32 operator> (const fixed24& operand1, const short operand2) 
{
    return operand1.all > SHORT_FIXED24(operand2);
}

/********************************************************************************************

>   INT32 operator< (const FIXED24& operand1, const FIXED24& operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    5/5/93
    Friend:     FIXED24
    Inputs:     Two FIXED24s to be compared.
    Outputs:    None.
    Returns:    0 - False
                1 - True
    Purpose:    Overloading the less-than operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

INT32 operator< (const fixed24& operand1, const fixed24& operand2) 
{
    return operand1.all < operand2.all;
}

/********************************************************************************************

>   INT32 operator< (const FIXED24& operand1, const short operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    5/5/93
    Friend:     FIXED24
    Inputs:     FIXED24
                short
    Outputs:    None.
    Returns:    0 - False
                1 - True
    Purpose:    Overloading the less-than operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

INT32 operator< (const fixed24& operand1, const short operand2) 
{
    return operand1.all < SHORT_FIXED24( operand2 );
}

/********************************************************************************************

>   INT32 operator>= (const FIXED24& operand1, const FIXED24& operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    5/5/93
    Friend:     FIXED24
    Inputs:     Two FIXED24s to be compared.
    Outputs:    None.
    Returns:    0 - False
                1 - True
    Purpose:    Overloading the greater-than-equal-to operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

INT32 operator>= (const fixed24& operand1, const fixed24& operand2) 
{
    return operand1.all >= operand2.all;
}

/********************************************************************************************

>   INT32 operator>= (const FIXED24& operand1, const short operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    5/5/93
    Friend:     FIXED24
    Inputs:     FIXED24
                short
    Outputs:    None.
    Returns:    0 - False
                1 - True
    Purpose:    Overloading the greater-than-equal-to operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

INT32 operator>= (const fixed24& operand1, const short operand2) 
{
    return operand1.all >= SHORT_FIXED24( operand2 );
}

/********************************************************************************************

>   INT32 operator<= (const FIXED24& operand1, const FIXED24& operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    5/5/93
    Friend:     FIXED24
    Inputs:     Two FIXED24s to be compared.
    Outputs:    None.
    Returns:    0 - False
                1 - True
    Purpose:    Overloading the less-than-equal-to operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

INT32 operator<= (const fixed24& operand1, const fixed24& operand2) 
{
    return operand1.all <= operand2.all;
}

/********************************************************************************************

>   INT32 operator<= (const FIXED24& operand1, const short operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    5/5/93
    Friend:     FIXED24
    Inputs:     FIXED24
                short
    Outputs:    None.
    Returns:    0 - False
                1 - True
    Purpose:    Overloading the less-than-equal-to operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

INT32 operator<= (const fixed24& operand1, const short operand2) 
{
    return operand1.all <= SHORT_FIXED24( operand2 );
}

// Assignment operators

/********************************************************************************************

>   FIXED24& FIXED24::operator= (const INT32 operand) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Inputs:     operand to be  assigned - rhs of assignment.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of assignment.
    Purpose:    Overloading the assignment operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24& fixed24::operator= (const INT32 operand)
{
    this->all = SHORT_FIXED24( operand );
    return *this;
}

/********************************************************************************************

>   FIXED24& FIXED24::operator= (const double operand) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    SeeAlso:    DoubleToFixed24().
    Inputs:     operand to be  assigned - rhs of assignment.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of assignment.
    Purpose:    Overloading the assignment operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24& fixed24::operator= (const double operand)
{ 
    F24ASSIGNTHIS = DoubleToFixed24(operand);
    return *this;
}

/********************************************************************************************

>   FIXED24& FIXED24::operator+= (const FIXED24& operand) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Inputs:     lvalue to be incremented
                operand to be added - rhs of assignment.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of assignment.
    Purpose:    Overloading the plus-equals operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24& fixed24::operator+= (const fixed24& operand)
{ 
    this->all += operand.all;
    return *this;
}

/********************************************************************************************

>   FIXED24& FIXED24::operator+= (const short operand) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Inputs:     lvalue to be incremented
                operand to be added - rhs of assignment.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of assignment.
    Purpose:    Overloading the plus-equals operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24& fixed24::operator+= (const short operand)
{ 
    this->all += SHORT_FIXED24( operand );
    return *this;
}

/********************************************************************************************

>   FIXED24& FIXED24::operator-= (const FIXED24& operand) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Inputs:     lvalue to be decremented
                operand to be subtracted - rhs of assignment.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of assignment.
    Purpose:    Overloading the minus-equals operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24& fixed24::operator-= (const fixed24& operand)
{
    this->all -= operand.all;
    return *this;
}

/********************************************************************************************

>   FIXED24& FIXED24::operator-= (const short operand) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Inputs:     lvalue to be decremented
                operand to be subtracted - rhs of assignment.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of assignment.
    Purpose:    Overloading the minus-equals operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24& fixed24::operator-= (const short operand)
{
    this->all -= SHORT_FIXED24( operand );
    return *this;
}

/********************************************************************************************

>   FIXED24& FIXED24::operator*= (const FIXED24& operand) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    SeeAlso:    Fixed24Mul().
    Inputs:     lvalue to be multiplied
                multiplier - rhs of assignment.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of assignment.
    Purpose:    Overloading the times-equals operator for FIXED24s.
    Errors:     None.

********************************************************************************************/
 
fixed24& fixed24::operator*= (const fixed24& operand)
{
    F24ASSIGNTHIS = Fixed24Mul(*this, operand);
    
    return *this;
}

/********************************************************************************************

>   FIXED24& FIXED24::operator*= (const short operand) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    SeeAlso:    Fixed24Mul().
    Inputs:     lvalue to be multiplied
                multiplier - rhs of assignment.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of assignment.
    Purpose:    Overloading the times-equals operator for FIXED24s.
    Errors:     None.

********************************************************************************************/
 
fixed24& fixed24::operator*= (const short operand)
{                                  
    fixed24 temp;
    
    temp.all = SHORT_FIXED24( operand );
    
    F24ASSIGNTHIS = Fixed24Mul(*this, temp);
    
    return *this;
}

/********************************************************************************************

>   FIXED24& FIXED24::operator/= (const FIXED24& operand) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    SeeAlso:    Fixed24Div().
    Inputs:     lvalue to be divided
                divisor - rhs of assignment.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of assignment.
    Purpose:    Overloading the divide-equals operator for FIXED24s.
    Errors:     None.

********************************************************************************************/
 
fixed24& fixed24::operator/= (const fixed24& operand)
{
    F24ASSIGNTHIS = Fixed24Div(*this, operand);
    
    return *this;
}
 
/********************************************************************************************

>   FIXED24& FIXED24::operator/= (const short operand) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    SeeAlso:    Fixed24Div().
    Inputs:     lvalue to be divided
                divisor - rhs of assignment.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of assignment.
    Purpose:    Overloading the divide-equals operator for FIXED24s.
    Errors:     None.

********************************************************************************************/
 
fixed24& fixed24::operator/= (const short operand)
{
    fixed24 temp;
    
    temp.all = SHORT_FIXED24( operand );
    
    F24ASSIGNTHIS = Fixed24Div(*this, temp);
    
    return *this;
}
 
/********************************************************************************************

>   FIXED24& FIXED24::operator<<= (const UINT32 operand) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Inputs:     lvalue to be shifted
                shift count - rhs of assignment.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of assignment.
    Purpose:    Overloading the left-shift-equals operator for FIXED24s.
    Errors:     None.

********************************************************************************************/
 
fixed24& fixed24::operator<<= (const UINT32 operand)
{
    this->all <<= operand;
    return *this;
}

/********************************************************************************************

>   FIXED24& FIXED24::operator>>= (const UINT32 operand) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Inputs:     lvalue to be shifted
                shift count - rhs of assignment.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of assignment.
    Purpose:    Overloading the right-shift-equals operator for FIXED24s.
    Errors:     None.

********************************************************************************************/
  
fixed24& fixed24::operator>>= (const UINT32 operand)
{
    this->all >>= operand;
    return *this;
} 

// Increment FIXED24::operators

/********************************************************************************************

>   FIXED24& FIXED24::operator++ () 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Inputs:     None.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of increment.
    Purpose:    Overloading the prefix plus-plus operator for FIXED24s.
    Errors:     None.

********************************************************************************************/
  
fixed24& fixed24::operator++ ()                         // prefix
{
    this->all += FIXED24_ONE;
    return *this;
}
                            
/********************************************************************************************

>   FIXED24 FIXED24::operator++ (INT32 dummy) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Inputs:     dummy value to distinguish between pre- and post-fix application.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of increment.
    Purpose:    Overloading the postfix plus-plus operator for FIXED24s.
    Errors:     None.

********************************************************************************************/
  
fixed24 fixed24::operator++ (INT32 dummy)                   // postfix 
{                
    fixed24 result = *this;
    
    this->all += FIXED24_ONE;
    
    return result;
}

/********************************************************************************************

>   FIXED24& FIXED24::operator-- () 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Inputs:     None.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of decrement.
    Purpose:    Overloading the prefix minus-minus operator for FIXED24s.
    Errors:     None.

********************************************************************************************/
  
fixed24& fixed24::operator-- ()                         // prefix 
{
    this->all -= FIXED24_ONE;
    return *this;
}

/********************************************************************************************

>   FIXED24 FIXED24::operator-- (INT32 dummy) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com> (Jason Williams)
    Created:    27/4/93
    Inputs:     dummy value to distinguish between pre- and post-fix application.
    Outputs:    None.
    Returns:    A reference to an FIXED24 with result of decrement.
    Purpose:    Overloading the postfix minus-minus operator for FIXED24s.
    Errors:     None.

********************************************************************************************/

fixed24 fixed24::operator-- (INT32 dummy)               // postfix 
{
    fixed24 result = *this;
    
    this->all -= FIXED24_ONE;
    
    return result;
}
    

---