/* $Xorg: pexExtract.h,v 1.3 2000/08/17 19:47:19 cpqbld Exp $ */


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#ifndef PEX_EXTRACT_H
#define PEX_EXTRACT_H	1

/**  Note that these extract macros, when dealing with data items which
 ** require more than a few bytes of storage (the only exceptions being
 ** CARD8, CARD16, and CARD32), simply set the destination to point into
 ** the packet from which the data is being "extracted".  This is 
 ** legal since the data is in the correct format (PEX format) in
 ** that packet.  The pointer into the packet is then
 ** incremented by the appropriate number of bytes.
 **/
 
#define REFER_COORD3D(dstPtr, srcPtr) {	    \
    (dstPtr) = (ddCoord3D *)(srcPtr);	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(pexCoord3D); }

#define REFER_LISTOF_COORD3D(num, dstPtr, srcPtr) {	\
    (dstPtr) = (ddCoord3D *)(srcPtr);			\
    (srcPtr) = ((CARD8 *) (srcPtr)) + num * sizeof(pexCoord3D); }

#define REFER_LISTOF_COORD2D(num, dstPtr, srcPtr) {	\
    (dstPtr) = (ddCoord2D *)(srcPtr);			\
    (srcPtr) = ((CARD8 *) (srcPtr)) + num * sizeof(pexCoord2D); }

#define REFER_LISTOF_CARD16(num, dstPtr, srcPtr) {	\
    (dstPtr) = (CARD16 *)(srcPtr);			\
    (srcPtr) = ((CARD8 *) (srcPtr)) + num * sizeof(CARD16); }

#define REFER_CARD8(dst, srcPtr) {	    \
    (dst) = *((CARD8 *)(srcPtr));	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(CARD8); }

#define REFER_CARD16(dst, srcPtr) {	    \
    (dst) = *((CARD16 *)(srcPtr));	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(CARD16); }

#define REFER_CARD32(dst, srcPtr) {	    \
    (dst) = *((CARD32 *)(srcPtr));	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(CARD32); }

#define REFER_FLOAT(dst, srcPtr) {	    \
    (dst) = *((PEXFLOAT *)(srcPtr));	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(PEXFLOAT); }

/** This is a very general macro which will set the destination pointer to
 ** be whatever the src pointer is, typecast to the specified type.  The
 ** src pointer is then incremented by the size of the specified type
 ** multiplied by a factor representing the number of such structures to 
 ** be skipped over.
 **/

#define REFER_STRUCT(num, data_type, dstPtr, srcPtr) {	    \
    (dstPtr) = (data_type *)(srcPtr);			    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + num * sizeof(data_type); }


/*
    The next set of macros actually copy the data from a packet
    into the destination data structure.
*/

#define EXTRACT_COORD3D(dstPtr, srcPtr) {  \
    (dstPtr)->x = ((pexCoord3D *)((srcPtr)))->x;  \
    (dstPtr)->y = ((pexCoord3D *)(srcPtr))->y;  \
    (dstPtr)->z = ((pexCoord3D *)(srcPtr))->z;  \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(pexCoord3D); }

#define EXTRACT_VECTOR3D(dstPtr, srcPtr) {  \
    (dstPtr)->x = ((pexVector3D *)((srcPtr)))->x;  \
    (dstPtr)->y = ((pexVector3D *)(srcPtr))->y;  \
    (dstPtr)->z = ((pexVector3D *)(srcPtr))->z;  \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(pexVector3D); }

#define EXTRACT_LISTOF_COORD3D(num, dstPtr, srcPtr) \
    EXTRACT_STRUCT(num, ddCoord3D, dstPtr, srcPtr)

#define EXTRACT_COORD2D(dstPtr, srcPtr) {  \
    (dstPtr)->x = ((pexCoord2D *)(srcPtr))->x;  \
    (dstPtr)->y = ((pexCoord2D *)(srcPtr))->y;  \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(pexCoord2D); }

#define EXTRACT_VECTOR2D(dstPtr, srcPtr) {  \
    (dstPtr)->x = ((pexVector2D *)(srcPtr))->x;  \
    (dstPtr)->y = ((pexVector2D *)(srcPtr))->y;  \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(pexVector2D); }

#define EXTRACT_LISTOF_COORD2D(num, dstPtr, srcPtr) \
    EXTRACT_STRUCT(num, ddCoord2D, dstPtr, srcPtr)

/* Takes a CARD8 from a 4 byte Protocol Field  */
#define EXTRACT_CARD8_FROM_4B(dst, srcPtr)	{   \
    (dst) = (CARD8) (*((CARD32 *)(srcPtr)));	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(CARD32); }

#define EXTRACT_CARD8(dst, srcPtr)	{   \
    (dst) = *((CARD8 *)(srcPtr));	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(CARD8); }

/* Takes a CARD16 from a 4 byte Protocol Field  */
#define EXTRACT_CARD16_FROM_4B(dst, srcPtr)	{   \
    (dst) = (CARD16) (*((CARD32 *)(srcPtr)));	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(CARD32); }

/* Takes a INT16 from a 4 byte Protocol Field  */
#define EXTRACT_INT16_FROM_4B(dst, srcPtr)	{   \
    (dst) = (INT16) (*((CARD32 *)(srcPtr)));	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(CARD32); }

#define EXTRACT_CARD16(dst, srcPtr)	{   \
    (dst) = *((CARD16 *)(srcPtr));	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(CARD16); }

#define EXTRACT_INT16(dst, srcPtr)	{   \
    (dst) = *((INT16 *)(srcPtr));	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(INT16); }

#define EXTRACT_CARD32(dst, srcPtr)	{   \
    (dst) = *((CARD32 *)(srcPtr));	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(CARD32); }

#define EXTRACT_FLOAT(dst, srcPtr)	{   \
    (dst) = *((PEXFLOAT *)(srcPtr));	    \
    (srcPtr) = ((CARD8 *) (srcPtr)) + sizeof(PEXFLOAT); }


#define EXTRACT_COLOUR_SPECIFIER(dst, srcPtr) { \
	EXTRACT_CARD16 ((dst).colourType, (srcPtr));\
	SKIP_PADDING ((srcPtr), 2);\
	switch ((dst).colourType) {\
	    case PEXIndexedColour: {\
		EXTRACT_CARD16((dst).colour.indexed.index, (srcPtr));\
		SKIP_PADDING((srcPtr),2);\
		break;\
	    }\
	    case PEXRgbFloatColour: {\
		EXTRACT_FLOAT((dst).colour.rgbFloat.red,(srcPtr));\
		EXTRACT_FLOAT((dst).colour.rgbFloat.green,(srcPtr));\
		EXTRACT_FLOAT((dst).colour.rgbFloat.blue,(srcPtr));\
		break;\
	    }\
	    case PEXCieFloatColour: {\
		EXTRACT_FLOAT((dst).colour.cieFloat.x,(srcPtr));\
		EXTRACT_FLOAT((dst).colour.cieFloat.y,(srcPtr));\
		EXTRACT_FLOAT((dst).colour.cieFloat.z,(srcPtr));\
		break;\
	    }\
	    case PEXHsvFloatColour: {\
		EXTRACT_FLOAT((dst).colour.hsvFloat.hue,(srcPtr));\
		EXTRACT_FLOAT((dst).colour.hsvFloat.saturation,(srcPtr));\
		EXTRACT_FLOAT((dst).colour.hsvFloat.value,(srcPtr));\
		break;\
	    }\
	    case PEXHlsFloatColour: {\
		EXTRACT_FLOAT((dst).colour.hlsFloat.hue,(srcPtr));\
		EXTRACT_FLOAT((dst).colour.hlsFloat.lightness,(srcPtr));\
		EXTRACT_FLOAT((dst).colour.hlsFloat.saturation,(srcPtr));\
		break;\
	    }\
	    case PEXRgb8Colour: {\
		EXTRACT_CARD8((dst).colour.rgb8.red,(srcPtr));\
		EXTRACT_CARD8((dst).colour.rgb8.green,(srcPtr));\
		EXTRACT_CARD8((dst).colour.rgb8.blue,(srcPtr));\
		SKIP_PADDING((srcPtr),1);\
		break;\
	    }\
	    case PEXRgb16Colour: {\
		EXTRACT_CARD16((dst).colour.rgb16.red,(srcPtr));\
		EXTRACT_CARD16((dst).colour.rgb16.green,(srcPtr));\
		EXTRACT_CARD16((dst).colour.rgb16.blue,(srcPtr));\
		SKIP_PADDING((srcPtr),2);\
		break;\
	    }\
	}}

/* JSH - assuming copy may overlap */
#define EXTRACT_STRUCT(num, data_type, dstPtr, srcPtr) {\
	memmove(	(char *)(dstPtr), (char *)(srcPtr), \
		(int)(num * sizeof(data_type)));\
	(srcPtr) = ((CARD8 *) (srcPtr)) + num * sizeof(data_type); }

/*
    The next set of macros actually copy the data from a structure
    into the destination reply packet.
*/

#define PACK_COORD3D(srcPtr, dstPtr)	{       \
    ((pexCoord3D *)(dstPtr))->x = (srcPtr)->x;  \
    ((pexCoord3D *)(dstPtr))->y = (srcPtr)->y;  \
    ((pexCoord3D *)(dstPtr))->z = (srcPtr)->z;  \
    (dstPtr) = ((CARD8 *) (dstPtr)) + sizeof(pexCoord3D); }

#define PACK_LISTOF_COORD3D(NUM, SRC, DST)  \
    PACK_LISTOF_STRUCT(NUM, pexCoord3D, SRC, DST)

#define PACK_COORD2D(srcPtr, dstPtr)	{       \
    ((pexCoord2D *)(dstPtr))->x = (srcPtr)->x;  \
    ((pexCoord2D *)(dstPtr))->y = (srcPtr)->y;  \
    (dstPtr) = ((CARD8 *) (dstPtr)) + sizeof(pexCoord2D); }

#define PACK_LISTOF_COORD2D(NUM, SRC, DST)  \
    PACK_LISTOF_STRUCT(NUM, pexCoord2D, SRC, DST)

#define PACK_VECTOR3D(srcPtr, dstPtr)	{       \
    ((pexVector3D *)(dstPtr))->x = (srcPtr)->x; \
    ((pexVector3D *)(dstPtr))->y = (srcPtr)->y; \
    ((pexVector3D *)(dstPtr))->z = (srcPtr)->z; \
    (dstPtr) = ((CARD8 *) (dstPtr)) + sizeof(pexCoord3D); }

#define PACK_VECTOR2D(srcPtr, dstPtr) {         \
    ((pexVector2D *)(dstPtr))->x = (srcPtr)->x; \
    ((pexVector2D *)(dstPtr))->y = (srcPtr)->y; \
    (dstPtr) = ((CARD8 *) (dstPtr)) + sizeof(pexCoord2D); }


#define PACK_CARD8(src, dstPtr)	{\
    *((CARD8 *)(dstPtr)) = (CARD8)(src);\
    (dstPtr) = ((CARD8 *) (dstPtr)) + sizeof(CARD8); }

#define PACK_CARD16(src, dstPtr)	{   \
    *((CARD16 *)(dstPtr)) = (CARD16)(src);  \
    (dstPtr) = ((CARD8 *) (dstPtr)) + sizeof(CARD16); }

#define PACK_INT16(src, dstPtr)	{   	\
    *((INT16 *)(dstPtr)) = (INT16)(src);\
    (dstPtr) = ((CARD8 *) (dstPtr)) + sizeof(INT16); }

#define PACK_CARD32(src, dstPtr)	{   \
    *((CARD32 *)(dstPtr)) = (CARD32)(src);  \
    (dstPtr) = ((CARD8 *) (dstPtr)) + sizeof(CARD32); }

#define PACK_FLOAT(src, dstPtr)	{\
    *((PEXFLOAT *)(dstPtr)) = (PEXFLOAT)(src);\
    (dstPtr) = ((CARD8 *) (dstPtr)) + sizeof(PEXFLOAT); }


#define PACK_COLOUR_SPECIFIER(src, dstPtr) {\
	PACK_CARD16 ((src).colourType, (dstPtr));\
	SKIP_PADDING ((dstPtr), 2);\
	switch ((src).colourType) {\
	    case PEXIndexedColour: {\
		PACK_CARD16((src).colour.indexed.index,(dstPtr));\
		SKIP_PADDING((dstPtr),2);\
		break;\
	    }\
	    case PEXRgbFloatColour: {\
		PACK_FLOAT((src).colour.rgbFloat.red,(dstPtr));\
		PACK_FLOAT((src).colour.rgbFloat.green,(dstPtr));\
		PACK_FLOAT((src).colour.rgbFloat.blue,(dstPtr));\
		break;\
	    }\
	    case PEXCieFloatColour: {\
		PACK_FLOAT((src).colour.cieFloat.x,(dstPtr));\
		PACK_FLOAT((src).colour.cieFloat.y,(dstPtr));\
		PACK_FLOAT((src).colour.cieFloat.z,(dstPtr));\
		break;\
	    }\
	    case PEXHsvFloatColour: {\
		PACK_FLOAT((src).colour.hsvFloat.hue,(dstPtr));\
		PACK_FLOAT((src).colour.hsvFloat.saturation,(dstPtr));\
		PACK_FLOAT((src).colour.hsvFloat.value,(dstPtr));\
		break;\
	    }\
	    case PEXHlsFloatColour: {\
		PACK_FLOAT((src).colour.hlsFloat.hue,(dstPtr));\
		PACK_FLOAT((src).colour.hlsFloat.lightness,(dstPtr));\
		PACK_FLOAT((src).colour.hlsFloat.saturation,(dstPtr));\
		break;\
	    }\
	    case PEXRgb8Colour: {\
		PACK_CARD8((src).colour.rgb8.red,(dstPtr));\
		PACK_CARD8((src).colour.rgb8.green,(dstPtr));\
		PACK_CARD8((src).colour.rgb8.blue,(dstPtr));\
		SKIP_PADDING((dstPtr),1);\
		break;\
	    }\
	    case PEXRgb16Colour: {\
		PACK_CARD16((src).colour.rgb16.red,(dstPtr));\
		PACK_CARD16((src).colour.rgb16.green,(dstPtr));\
		PACK_CARD16((src).colour.rgb16.blue,(dstPtr));\
		SKIP_PADDING((dstPtr),2);\
		break;\
	    }\
	}}

/* JSH - assuming copy may overlap */
#define PACK_STRUCT(data_type,srcPtr,dstPtr)	{       \
    memmove(  (char *)(dstPtr),	(char *)(srcPtr), 	\
	    sizeof(data_type));				\
    SKIP_STRUCT(dstPtr, 1, data_type); }

/* JSH - assuming copy may overlap */
#define PACK_LISTOF_STRUCT(num,data_type,srcPtr,dstPtr){\
    memmove(  (char *)(dstPtr),	(char *)(srcPtr), 	\
	    (int)(num * sizeof(data_type)));	\
    SKIP_STRUCT(dstPtr, num, data_type); }
/*
	Other useful macros
 */

#define SKIP_PADDING(skipPtr, bytesToSkip) \
  (skipPtr) = ((CARD8 *) (skipPtr)) + bytesToSkip

#define SKIP_STRUCT(skipPtr, num, data_type) \
   (skipPtr) = (unsigned char *)(((data_type *)skipPtr) + (num))

#define SIZE_COLOURSPEC(cs) ColourSpecSizes[cs.colourType]

/*
###define SIZE_COLOURSPEC(cs) \
    (cs->colourType == PEXIndexedColour)?sizeof(CARD32):\
	((cs->colourType == PEXRgb8Colour)?sizeof(CARD32):\
	    ((cs->colourType == PEXRgb16Colour)?2*sizeof(CARD32):\
		3*sizeof(PEXFLOAT) ) )
*/

#endif /* PEX_EXTRACT_H */