/*  					W3C Sample Code Library libwww MUX Header Definition!  MUX Header Definition!*//***	(c) COPYRIGHT MIT 1995.**	Please first read the full copyright statement in the file COPYRIGH.*//*Define the parts of a mux header as defined by the MUX draft specification.This is not finalized so be warned!This module is does not contain a .c file. It is a part of the W3C Sample Code Library.*/#ifndef HTMUXHEADER_H#define HTMUXHEADER_H/*.  Byte Swapping.MUX is currently using little endian headers.*/#ifdef WORDS_BIGENDIAN#define HT_WORDSWAP(a) ( ((a) << 24) | \		         (((a) << 8) & 0x00ff0000) | \		         (((a) >> 8) & 0x0000ff00) | \	                 ((unsigned int)(a) >> 24) )#else#define HT_WORDSWAP(a) ((a))#endif/*.  The MUX Header.Simple, huh?*/typedef unsigned int  HTMuxHeader;/*(  Generic Header flags)*/#define MUX_LONG_LENGTH	0x80000000#define MUX_CONTROL	0x40000000/*(  Data Header Flags)*/#define MUX_FLAGS       0x3C000000#define MUX_SYN		0x20000000#define MUX_FIN		0x10000000#define MUX_RST		0x08000000#define MUX_PUSH 	0x04000000/*(  Control Header Opcodes)*/#define MUX_OPCODES     0x3C000000#define MUX_STRING	0x00000000#define MUX_STACK	0x04000000#define MUX_FRAGMENT	0x08000000#define MUX_CREDIT	0x0C000000/*(  Length and Session ID)*/#define MUX_SESSION	0x03FC0000#define MUX_LENGTH	0x0003FFFF/*.  Macros for Byte Shifting.*/#define MUX_SET_SID(sid)	((sid) << 18)#define MUX_SET_LEN(len)	((len))#define MUX_SET_PID             MUX_SET_LEN#define MUX_SET_OPCODE(op)      ((op) << 26)#define MUX_GET_SID(sid)	(((sid) & MUX_SESSION) >> 18)#define MUX_GET_LEN(len)	((len) & MUX_LENGTH)#define MUX_GET_PID             MUX_GET_LEN#define MUX_GET_OPCODE(op)      ((op) & MUX_OPCODES >> 26)/*.  Header Alignment.You can force 8 byte alignment by defining this to 1. Normally, we decidepr MUX segment whether we have to use a long header or not.*/#define LONG_LENGTH	0			     /* 4 or 8 bytes header? */#define MUX_IS_LONG(hdr)     ((hdr) & MUX_LONG_LENGTH)#define MUX_ALIGN(len)       ((len) + ((4-(len)%4) % 4))#define MUX_LONG_ALIGN(len)  ((len) + ((8-(len)%8) % 8))/*.Default Values.*/#define DEFAULT_CREDIT          4096/**/#endif/*    @(#) $Id: HTMuxHeader.html,v 2.3 1998/05/14 02:10:48 frystyk Exp $*/