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Author: Ralph Mor, X Consortium
******************************************************************************/

#ifndef _ICEMSG_H_
#define _ICEMSG_H_

#include <X11/Xfuncproto.h>

#include <X11/ICE/ICEconn.h>

_XFUNCPROTOBEGIN

/*
 * Function prototypes for internal ICElib functions
 */

extern Status _IceRead (
    IceConn		/* iceConn */,
    unsigned long	/* nbytes */,
    char *		/* ptr */
);

extern void _IceReadSkip (
    IceConn		/* iceConn */,
    unsigned long	/* nbytes */
);

extern void _IceWrite (
    IceConn		/* iceConn */,
    unsigned long	/* nbytes */,
    char *		/* ptr */
);

extern void _IceErrorBadMinor (
    IceConn		/* iceConn */,
    int			/* majorOpcode */,
    int			/* offendingMinor */,
    int			/* severity */
);

extern void _IceErrorBadState (
    IceConn		/* iceConn */,
    int			/* majorOpcode */,
    int			/* offendingMinor */,
    int			/* severity */
);

extern void _IceErrorBadLength (
    IceConn		/* iceConn */,
    int			/* majorOpcode */,
    int			/* offendingMinor */,
    int			/* severity */
);

extern void _IceErrorBadValue (
    IceConn		/* iceConn */,
    int			/* majorOpcode */,
    int			/* offendingMinor */,
    int			/* offset */,
    int			/* length */,
    IcePointer		/* value */
);

extern IcePoAuthStatus _IcePoMagicCookie1Proc (
    IceConn		/* iceConn */,
    IcePointer *	/* authStatePtr */,
    Bool 		/* cleanUp */,
    Bool		/* swap */,
    int     		/* authDataLen */,
    IcePointer		/* authData */,
    int *		/* replyDataLenRet */,
    IcePointer *	/* replyDataRet */,
    char **		/* errorStringRet */
);

extern IcePaAuthStatus _IcePaMagicCookie1Proc (
    IceConn		/* iceConn */,
    IcePointer *	/* authStatePtr */,
    Bool		/* swap */,
    int     		/* authDataLen */,
    IcePointer		/* authData */,
    int *		/* replyDataLenRet */,
    IcePointer *	/* replyDataRet */,
    char **		/* errorStringRet */
);

/*
 * Macro to check if IO operations are valid on an ICE connection.
 */

#define IceValidIO(_iceConn) _iceConn->io_ok

/*
 * Macros for writing messages.
 */

#define IceGetHeader(_iceConn, _major, _minor, _headerSize, _msgType, _pMsg) \
    if ((_iceConn->outbufptr + _headerSize) > _iceConn->outbufmax) \
        IceFlush (_iceConn); \
    _pMsg = (_msgType *) _iceConn->outbufptr; \
    _pMsg->majorOpcode = _major; \
    _pMsg->minorOpcode = _minor; \
    _pMsg->length = (_headerSize - SIZEOF (iceMsg)) >> 3; \
    _iceConn->outbufptr += _headerSize; \
    _iceConn->send_sequence++

#define IceGetHeaderExtra(_iceConn, _major, _minor, _headerSize, _extra, _msgType, _pMsg, _pData) \
    if ((_iceConn->outbufptr + \
	_headerSize + ((_extra) << 3)) > _iceConn->outbufmax) \
        IceFlush (_iceConn); \
    _pMsg = (_msgType *) _iceConn->outbufptr; \
    if ((_iceConn->outbufptr + \
	_headerSize + ((_extra) << 3)) <= _iceConn->outbufmax) \
        _pData = (char *) _pMsg + _headerSize; \
    else \
        _pData = NULL; \
    _pMsg->majorOpcode = _major; \
    _pMsg->minorOpcode = _minor; \
    _pMsg->length = ((_headerSize - SIZEOF (iceMsg)) >> 3) + (_extra); \
    _iceConn->outbufptr += (_headerSize + ((_extra) << 3)); \
    _iceConn->send_sequence++

#define IceSimpleMessage(_iceConn, _major, _minor) \
{ \
    iceMsg *_pMsg; \
    IceGetHeader (_iceConn, _major, _minor, SIZEOF (iceMsg), iceMsg, _pMsg); \
}

#define IceErrorHeader(_iceConn, _offendingMajorOpcode, _offendingMinorOpcode, _offendingSequenceNum, _severity, _errorClass, _dataLength) \
{ \
    iceErrorMsg	*_pMsg; \
\
    IceGetHeader (_iceConn, _offendingMajorOpcode, ICE_Error, \
	SIZEOF (iceErrorMsg), iceErrorMsg, _pMsg); \
    _pMsg->length += (_dataLength); \
    _pMsg->offendingMinorOpcode = (CARD8) _offendingMinorOpcode; \
    _pMsg->severity = (CARD8) _severity; \
    _pMsg->offendingSequenceNum = (CARD32) _offendingSequenceNum; \
    _pMsg->errorClass = (CARD16) _errorClass; \
}

/*
 * Write data into the ICE output buffer.
 */

#define IceWriteData(_iceConn, _bytes, _data) \
{ \
    if ((_iceConn->outbufptr + (_bytes)) > _iceConn->outbufmax) \
    { \
	IceFlush (_iceConn); \
        _IceWrite (_iceConn, (unsigned long) (_bytes), _data); \
    } \
    else \
    { \
        memcpy (_iceConn->outbufptr, _data, _bytes); \
        _iceConn->outbufptr += (_bytes); \
    } \
}

#define IceWriteData16(_iceConn, _bytes, _data) \
    IceWriteData (_iceConn, _bytes, (char *) _data)

#define IceWriteData32(_iceConn, _bytes, _data) \
    IceWriteData (_iceConn, _bytes, (char *) _data)

/*
 * The IceSendData macro bypasses copying the data to the
 * ICE connection buffer and sends the data directly.  If necessary,
 * the ICE connection buffer is first flushed.
 */

#define IceSendData(_iceConn, _bytes, _data) \
{ \
    if (_iceConn->outbufptr > _iceConn->outbuf) \
	IceFlush (_iceConn); \
    _IceWrite (_iceConn, (unsigned long) (_bytes), _data); \
}

/*
 * Write pad bytes.  Used to force 32 or 64 bit alignment.
 * A maximum of 7 pad bytes can be specified.
 */

#define IceWritePad(_iceConn, _bytes) \
{ \
    if ((_iceConn->outbufptr + (_bytes)) > _iceConn->outbufmax) \
    { \
        char _dummy[7] = { 0 }; \
        IceFlush (_iceConn); \
        _IceWrite (_iceConn, (unsigned long) (_bytes), _dummy); \
    } \
    else \
    { \
        _iceConn->outbufptr += (_bytes); \
    } \
}

/*
 * Macros for reading messages.
 */

#define IceReadCompleteMessage(_iceConn, _headerSize, _msgType, _pMsg, _pData)\
{ \
    unsigned long _bytes; \
    IceReadMessageHeader (_iceConn, _headerSize, _msgType, _pMsg); \
    _bytes = (_pMsg->length << 3) - (_headerSize - SIZEOF (iceMsg)); \
    if ((_iceConn->inbufmax - _iceConn->inbufptr) >= _bytes) \
    { \
	_IceRead (_iceConn, _bytes, _iceConn->inbufptr); \
	_pData = _iceConn->inbufptr; \
	_iceConn->inbufptr += _bytes; \
    } \
    else \
    { \
	_pData = malloc (_bytes); \
        if (_pData) \
	    _IceRead (_iceConn, _bytes, _pData); \
        else \
	    _IceReadSkip (_iceConn, _bytes); \
    } \
}

#define IceDisposeCompleteMessage(_iceConn, _pData) \
    if ((char *) _pData < _iceConn->inbuf || \
	(char *) _pData >= _iceConn->inbufmax) \
        free (_pData);

#define IceReadSimpleMessage(_iceConn, _msgType, _pMsg) \
    _pMsg = (_msgType *) (_iceConn->inbuf);

#define IceReadMessageHeader(_iceConn, _headerSize, _msgType, _pMsg) \
{ \
    _IceRead (_iceConn, \
	(unsigned long) (_headerSize - SIZEOF (iceMsg)), \
	_iceConn->inbufptr); \
    _pMsg = (_msgType *) (_iceConn->inbuf); \
    _iceConn->inbufptr += (_headerSize - SIZEOF (iceMsg)); \
}

#define IceReadData(_iceConn, _bytes, _pData) \
    _IceRead (_iceConn, (unsigned long) (_bytes), (char *) _pData); \

#define IceReadData16(_iceConn, _swap, _bytes, _pData) \
{ \
    _IceRead (_iceConn, (unsigned long) (_bytes), (char *) _pData); \
}

#define IceReadData32(_iceConn, _swap, _bytes, _pData) \
{ \
    _IceRead (_iceConn, (unsigned long) (_bytes), (char *) _pData); \
}

/*
 * Read pad bytes (for 32 or 64 bit alignment).
 * A maxium of 7 pad bytes can be specified.
 */

#define IceReadPad(_iceConn, _bytes) \
{ \
    char _dummy[7]; \
    _IceRead (_iceConn, (unsigned long) (_bytes), _dummy); \
}

_XFUNCPROTOEND

#endif /* _ICEMSG_H_ */

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