ccmaths.cpp

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// $Id: ccmaths.cpp 1282 2006-06-09 09:46:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
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               Xara LX, a vector drawing and manipulation program.
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 */


#include "camtypes.h"
//#include "fixed.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "xlong.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "ccmaths.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "fixed16.h" - in camtypes.h [AUTOMATICALLY REMOVED]

DECLARE_SOURCE("$Revision: 1282 $");


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

>   XLONG Mul(const INT32 operand1, const INT32 operand2) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com>
    Created:    26/4/93
    Inputs:     Two INT32 values
    SeeAlso:    Xlongasm.h
    Outputs:    None
    Returns:    A reference to an xlong with result of multiplication.
    Purpose:    Multiplication of two 32-bit signed numbers (xlongs). 
    Errors:     None.

********************************************************************************************/
/*
Technical notes:

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

XLONG Mul(const INT32 operand1, const INT32 operand2)
{
    XLONG result;

    XMul32(operand1, operand2, result);

    return result;
}

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

>   XLONG Asl (const INT32, UINT32)

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com>
    Created:    5/5/93
    Inputs:     INT32 - value to be shifted
                UINT32 - shift count
    Outputs:    None
    Returns:    XLONG - shifted number. 
    Purpose:    Performs arithmetic shift left. 
    Errors:     None.

********************************************************************************************/
/*
Technical notes:

    Using the ASL provided with xlong for now.

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

XLONG Asl (const INT32 value, UINT32 shift)
{   
    XLONG result;
    
    result = MakeXLong(value);
    
    return  (result << shift);

}

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

>   XLONG Asr (const INT32, UINT32)

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com>
    Created:    5/5/93
    Inputs:     INT32 - value to be shifted
                UINT32 - shift count
    Outputs:    None
    Returns:    XLONG - shifted number. 
    Purpose:    Performs arithmetic shift right. 
    Errors:     None.

********************************************************************************************/
/*
Technical notes:

    Using the ASR provided with xlong for now.

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

XLONG Asr (const INT32 value, UINT32 shift)
{   
    return ( XLONG(value) >> shift);
}

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

>   INT32 MulDiv32By32(const INT32 operand1, const INT32 operand2, const INT32 operand3) 

    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com>
    Created:    5/5/93
    SeeAlso:    Xlongasm.h
    Inputs:     operand1 - multiplicand 1
                operand2 - multiplicand 2
                operand3 - divisor
    Outputs:    None
    Returns:    INT32 -  result of multiply-divide. 
    Purpose:    Multiplies two 32-bit values and divides the result by another 32-bit value. 
    Errors:     None.

********************************************************************************************/
/*
Technical notes:

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

INT32 MulDiv32By32(const INT32 operand1, const INT32 operand2, const INT32 operand3)  
{
    return Mul32Div32( operand1, operand2, operand3 );
}

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

>   XLONG MakeXLong (const INT32 operand)
    
    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com>
    Created:    5/5/93
    SeeAlso:    Xlongasm.h
    Inputs:     Long value to be converted.
    Outputs:    None.
    Returns:    an xlong value.
    Purpose:    To convert an INT32 value to an xlong. 
    Errors:     None.

**********************************************************************************************/
/*
Technical notes:

**********************************************************************************************/
                                
XLONG MakeXLong (const INT32 operand)
{
    return XLONG(operand);
}

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

>   XLONG MakeXLong (const double operand)
    
    Author:     Mario_Shamtani (Xara Group Ltd) <camelotdev@xara.com>
    Created:    5/5/93
    SeeAlso:    Xlongasm.h
    Inputs:     double value to be converted.
    Outputs:    None.
    Returns:    an xlong value.
    Purpose:    To convert a double value to an xlong. 
    Errors:     None.

**********************************************************************************************/
/*
Technical notes:

**********************************************************************************************/
                                
XLONG MakeXLong(const double operand)
{
    xlong result;

    DoubleToXlong(operand, result);

    return result;
}
/********************************************************************************************

>   FIXED16 Div32By32( INT32 arg1, INT32 arg2 )

    Author:     Andy_Pennell (Xara Group Ltd) <camelotdev@xara.com>
    Created:    11/5/93
    Inputs:     two signed 32-bit numbers
    Outputs:    None
    Returns:    FIXED16 result of arg1/arg2
    Scope:      Private to the CCMATHS library.
    Purpose:    Obtain a fixed-point representation of the ratio between two signed
            numbers.
    Errors:     None. Div0 and overflow will create a div0 exception.
    See Also:   InternalDiv32by32

This fn is inline.

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

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

< Maths Types
< Maths Conversion Table
< Conversion

comment:
\pard\plain
\trowd \trgaph108\trleft-108 
\cellx1593\cellx3294\cellx4995\cellx6696\cellx8397\cellx10098\pard\plain 
\qc \intbl \fs20\lang2057 {\b From}{\b  }{\b \\}{\b  }{\b To}{\b \cell }{\b INT32}{\b \cell }
{\b INT32}{\b \cell }{\b XLONG}{\b \cell }{\b FIXED16}{\b \cell }{\b double}{\b \cell }\row 
\qc\intbl {\b INT32}{\b \cell }-\cell auto
\cell constructor
\par operator=\cell constructor
\par operator=\cell auto\cell \pard \intbl \row \pard \qc\intbl {\b INT32}{\b \cell }
built-in cast\cell -\cell MakeXlong()
\par constructor
\par operator=
\par cast operator\cell operator=
\par constructor\cell auto\cell \pard \intbl \row \pard \qc\intbl {\b XLONG}{\b \cell }
MakeInt()\cell MakeLong()\cell -\cell MakeFixed16()\cell MakeDouble()\cell \pard 
\intbl \row \pard \qc\intbl {\b FIXED16}{\b \cell }MakeInt()\cell MakeLong()\cell 
MakeXlong()\cell -\cell MakeDouble()\cell \row \qc\intbl {\b double}
{\b \cell }explicit cast\cell explicit cast\cell MakeXlong()\cell operator=
\par constructor\cell -\cell \pard \intbl \row \pard 

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

---