mirror of
https://github.com/dhewm/dhewm3.git
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680 lines
21 KiB
C++
680 lines
21 KiB
C++
/*
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===========================================================================
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Doom 3 GPL Source Code
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Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").
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Doom 3 Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 Source Code is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#ifndef __BITMSG_H__
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#define __BITMSG_H__
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#include "idlib/math/Vector.h"
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#include "idlib/Dict.h"
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#include "framework/Common.h"
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/*
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===============================================================================
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idBitMsg
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Handles byte ordering and avoids alignment errors.
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Allows concurrent writing and reading.
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The data set with Init is never freed.
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===============================================================================
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*/
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class idBitMsg {
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public:
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idBitMsg();
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~idBitMsg() {}
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void Init( byte *data, int length );
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void Init( const byte *data, int length );
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byte * GetData( void ); // get data for writing
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const byte * GetData( void ) const; // get data for reading
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int GetMaxSize( void ) const; // get the maximum message size
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void SetAllowOverflow( bool set ); // generate error if not set and message is overflowed
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bool IsOverflowed( void ) const; // returns true if the message was overflowed
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int GetSize( void ) const; // size of the message in bytes
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void SetSize( int size ); // set the message size
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int GetWriteBit( void ) const; // get current write bit
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void SetWriteBit( int bit ); // set current write bit
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int GetNumBitsWritten( void ) const; // returns number of bits written
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int GetRemainingWriteBits( void ) const; // space left in bits for writing
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void SaveWriteState( int &s, int &b ) const; // save the write state
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void RestoreWriteState( int s, int b ); // restore the write state
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int GetReadCount( void ) const; // bytes read so far
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void SetReadCount( int bytes ); // set the number of bytes and bits read
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int GetReadBit( void ) const; // get current read bit
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void SetReadBit( int bit ); // set current read bit
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int GetNumBitsRead( void ) const; // returns number of bits read
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int GetRemainingReadBits( void ) const; // number of bits left to read
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void SaveReadState( int &c, int &b ) const; // save the read state
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void RestoreReadState( int c, int b ); // restore the read state
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void BeginWriting( void ); // begin writing
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int GetRemainingSpace( void ) const; // space left in bytes
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void WriteByteAlign( void ); // write up to the next byte boundary
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void WriteBits( int value, int numBits ); // write the specified number of bits
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void WriteChar( int c );
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void WriteByte( int c );
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void WriteShort( int c );
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void WriteUShort( int c );
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void WriteInt( int c );
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void WriteFloat( float f );
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void WriteFloat( float f, int exponentBits, int mantissaBits );
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void WriteAngle8( float f );
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void WriteAngle16( float f );
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void WriteDir( const idVec3 &dir, int numBits );
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void WriteString( const char *s, int maxLength = -1, bool make7Bit = true );
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void WriteData( const void *data, int length );
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void WriteNetadr( const netadr_t adr );
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void WriteDeltaChar( int oldValue, int newValue );
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void WriteDeltaByte( int oldValue, int newValue );
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void WriteDeltaShort( int oldValue, int newValue );
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void WriteDeltaInt( int oldValue, int newValue );
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void WriteDeltaFloat( float oldValue, float newValue );
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void WriteDeltaFloat( float oldValue, float newValue, int exponentBits, int mantissaBits );
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void WriteDeltaByteCounter( int oldValue, int newValue );
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void WriteDeltaShortCounter( int oldValue, int newValue );
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void WriteDeltaIntCounter( int oldValue, int newValue );
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bool WriteDeltaDict( const idDict &dict, const idDict *base );
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void BeginReading( void ) const; // begin reading.
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int GetRemaingData( void ) const; // number of bytes left to read
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void ReadByteAlign( void ) const; // read up to the next byte boundary
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int ReadBits( int numBits ) const; // read the specified number of bits
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int ReadChar( void ) const;
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int ReadByte( void ) const;
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int ReadShort( void ) const;
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int ReadUShort( void ) const;
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int ReadInt( void ) const;
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float ReadFloat( void ) const;
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float ReadFloat( int exponentBits, int mantissaBits ) const;
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float ReadAngle8( void ) const;
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float ReadAngle16( void ) const;
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idVec3 ReadDir( int numBits ) const;
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int ReadString( char *buffer, int bufferSize ) const;
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int ReadData( void *data, int length ) const;
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void ReadNetadr( netadr_t *adr ) const;
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int ReadDeltaChar( int oldValue ) const;
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int ReadDeltaByte( int oldValue ) const;
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int ReadDeltaShort( int oldValue ) const;
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int ReadDeltaInt( int oldValue ) const;
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float ReadDeltaFloat( float oldValue ) const;
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float ReadDeltaFloat( float oldValue, int exponentBits, int mantissaBits ) const;
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int ReadDeltaByteCounter( int oldValue ) const;
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int ReadDeltaShortCounter( int oldValue ) const;
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int ReadDeltaIntCounter( int oldValue ) const;
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bool ReadDeltaDict( idDict &dict, const idDict *base ) const;
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static int DirToBits( const idVec3 &dir, int numBits );
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static idVec3 BitsToDir( int bits, int numBits );
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private:
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byte * writeData; // pointer to data for writing
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const byte * readData; // pointer to data for reading
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int maxSize; // maximum size of message in bytes
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int curSize; // current size of message in bytes
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int writeBit; // number of bits written to the last written byte
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mutable int readCount; // number of bytes read so far
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mutable int readBit; // number of bits read from the last read byte
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bool allowOverflow; // if false, generate an error when the message is overflowed
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bool overflowed; // set to true if the buffer size failed (with allowOverflow set)
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private:
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bool CheckOverflow( int numBits );
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byte * GetByteSpace( int length );
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void WriteDelta( int oldValue, int newValue, int numBits );
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int ReadDelta( int oldValue, int numBits ) const;
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};
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ID_INLINE void idBitMsg::Init( byte *data, int length ) {
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writeData = data;
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readData = data;
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maxSize = length;
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}
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ID_INLINE void idBitMsg::Init( const byte *data, int length ) {
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writeData = NULL;
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readData = data;
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maxSize = length;
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}
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ID_INLINE byte *idBitMsg::GetData( void ) {
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return writeData;
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}
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ID_INLINE const byte *idBitMsg::GetData( void ) const {
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return readData;
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}
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ID_INLINE int idBitMsg::GetMaxSize( void ) const {
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return maxSize;
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}
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ID_INLINE void idBitMsg::SetAllowOverflow( bool set ) {
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allowOverflow = set;
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}
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ID_INLINE bool idBitMsg::IsOverflowed( void ) const {
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return overflowed;
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}
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ID_INLINE int idBitMsg::GetSize( void ) const {
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return curSize;
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}
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ID_INLINE void idBitMsg::SetSize( int size ) {
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if ( size > maxSize ) {
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curSize = maxSize;
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} else {
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curSize = size;
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}
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}
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ID_INLINE int idBitMsg::GetWriteBit( void ) const {
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return writeBit;
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}
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ID_INLINE void idBitMsg::SetWriteBit( int bit ) {
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writeBit = bit & 7;
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if ( writeBit ) {
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writeData[curSize - 1] &= ( 1 << writeBit ) - 1;
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}
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}
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ID_INLINE int idBitMsg::GetNumBitsWritten( void ) const {
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return ( ( curSize << 3 ) - ( ( 8 - writeBit ) & 7 ) );
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}
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ID_INLINE int idBitMsg::GetRemainingWriteBits( void ) const {
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return ( maxSize << 3 ) - GetNumBitsWritten();
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}
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ID_INLINE void idBitMsg::SaveWriteState( int &s, int &b ) const {
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s = curSize;
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b = writeBit;
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}
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ID_INLINE void idBitMsg::RestoreWriteState( int s, int b ) {
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curSize = s;
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writeBit = b & 7;
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if ( writeBit ) {
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writeData[curSize - 1] &= ( 1 << writeBit ) - 1;
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}
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}
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ID_INLINE int idBitMsg::GetReadCount( void ) const {
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return readCount;
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}
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ID_INLINE void idBitMsg::SetReadCount( int bytes ) {
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readCount = bytes;
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}
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ID_INLINE int idBitMsg::GetReadBit( void ) const {
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return readBit;
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}
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ID_INLINE void idBitMsg::SetReadBit( int bit ) {
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readBit = bit & 7;
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}
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ID_INLINE int idBitMsg::GetNumBitsRead( void ) const {
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return ( ( readCount << 3 ) - ( ( 8 - readBit ) & 7 ) );
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}
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ID_INLINE int idBitMsg::GetRemainingReadBits( void ) const {
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return ( curSize << 3 ) - GetNumBitsRead();
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}
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ID_INLINE void idBitMsg::SaveReadState( int &c, int &b ) const {
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c = readCount;
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b = readBit;
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}
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ID_INLINE void idBitMsg::RestoreReadState( int c, int b ) {
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readCount = c;
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readBit = b & 7;
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}
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ID_INLINE void idBitMsg::BeginWriting( void ) {
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curSize = 0;
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overflowed = false;
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writeBit = 0;
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}
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ID_INLINE int idBitMsg::GetRemainingSpace( void ) const {
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return maxSize - curSize;
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}
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ID_INLINE void idBitMsg::WriteByteAlign( void ) {
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writeBit = 0;
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}
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ID_INLINE void idBitMsg::WriteChar( int c ) {
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WriteBits( c, -8 );
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}
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ID_INLINE void idBitMsg::WriteByte( int c ) {
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WriteBits( c, 8 );
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}
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ID_INLINE void idBitMsg::WriteShort( int c ) {
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WriteBits( c, -16 );
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}
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ID_INLINE void idBitMsg::WriteUShort( int c ) {
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WriteBits( c, 16 );
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}
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ID_INLINE void idBitMsg::WriteInt( int c ) {
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WriteBits( c, 32 );
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}
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ID_INLINE void idBitMsg::WriteFloat( float f ) {
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WriteBits( *reinterpret_cast<int *>(&f), 32 );
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}
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ID_INLINE void idBitMsg::WriteFloat( float f, int exponentBits, int mantissaBits ) {
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int bits = idMath::FloatToBits( f, exponentBits, mantissaBits );
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WriteBits( bits, 1 + exponentBits + mantissaBits );
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}
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ID_INLINE void idBitMsg::WriteAngle8( float f ) {
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WriteByte( ANGLE2BYTE( f ) );
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}
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ID_INLINE void idBitMsg::WriteAngle16( float f ) {
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WriteShort( ANGLE2SHORT(f) );
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}
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ID_INLINE void idBitMsg::WriteDir( const idVec3 &dir, int numBits ) {
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WriteBits( DirToBits( dir, numBits ), numBits );
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}
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ID_INLINE void idBitMsg::WriteDeltaChar( int oldValue, int newValue ) {
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WriteDelta( oldValue, newValue, -8 );
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}
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ID_INLINE void idBitMsg::WriteDeltaByte( int oldValue, int newValue ) {
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WriteDelta( oldValue, newValue, 8 );
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}
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ID_INLINE void idBitMsg::WriteDeltaShort( int oldValue, int newValue ) {
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WriteDelta( oldValue, newValue, -16 );
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}
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ID_INLINE void idBitMsg::WriteDeltaInt( int oldValue, int newValue ) {
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WriteDelta( oldValue, newValue, 32 );
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}
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ID_INLINE void idBitMsg::WriteDeltaFloat( float oldValue, float newValue ) {
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WriteDelta( *reinterpret_cast<int *>(&oldValue), *reinterpret_cast<int *>(&newValue), 32 );
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}
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ID_INLINE void idBitMsg::WriteDeltaFloat( float oldValue, float newValue, int exponentBits, int mantissaBits ) {
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int oldBits = idMath::FloatToBits( oldValue, exponentBits, mantissaBits );
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int newBits = idMath::FloatToBits( newValue, exponentBits, mantissaBits );
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WriteDelta( oldBits, newBits, 1 + exponentBits + mantissaBits );
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}
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ID_INLINE void idBitMsg::BeginReading( void ) const {
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readCount = 0;
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readBit = 0;
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}
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ID_INLINE int idBitMsg::GetRemaingData( void ) const {
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return curSize - readCount;
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}
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ID_INLINE void idBitMsg::ReadByteAlign( void ) const {
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readBit = 0;
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}
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ID_INLINE int idBitMsg::ReadChar( void ) const {
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return (signed char)ReadBits( -8 );
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}
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ID_INLINE int idBitMsg::ReadByte( void ) const {
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return (unsigned char)ReadBits( 8 );
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}
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ID_INLINE int idBitMsg::ReadShort( void ) const {
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return (short)ReadBits( -16 );
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}
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ID_INLINE int idBitMsg::ReadUShort( void ) const {
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return (unsigned short)ReadBits( 16 );
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}
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ID_INLINE int idBitMsg::ReadInt( void ) const {
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return ReadBits( 32 );
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}
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ID_INLINE float idBitMsg::ReadFloat( void ) const {
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float value;
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*reinterpret_cast<int *>(&value) = ReadBits( 32 );
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return value;
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}
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ID_INLINE float idBitMsg::ReadFloat( int exponentBits, int mantissaBits ) const {
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int bits = ReadBits( 1 + exponentBits + mantissaBits );
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return idMath::BitsToFloat( bits, exponentBits, mantissaBits );
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}
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ID_INLINE float idBitMsg::ReadAngle8( void ) const {
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return BYTE2ANGLE( ReadByte() );
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}
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ID_INLINE float idBitMsg::ReadAngle16( void ) const {
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return SHORT2ANGLE( ReadShort() );
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}
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ID_INLINE idVec3 idBitMsg::ReadDir( int numBits ) const {
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return BitsToDir( ReadBits( numBits ), numBits );
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}
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ID_INLINE int idBitMsg::ReadDeltaChar( int oldValue ) const {
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return (signed char)ReadDelta( oldValue, -8 );
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}
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ID_INLINE int idBitMsg::ReadDeltaByte( int oldValue ) const {
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return (unsigned char)ReadDelta( oldValue, 8 );
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}
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ID_INLINE int idBitMsg::ReadDeltaShort( int oldValue ) const {
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return (short)ReadDelta( oldValue, -16 );
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}
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ID_INLINE int idBitMsg::ReadDeltaInt( int oldValue ) const {
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return ReadDelta( oldValue, 32 );
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}
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ID_INLINE float idBitMsg::ReadDeltaFloat( float oldValue ) const {
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float value;
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*reinterpret_cast<int *>(&value) = ReadDelta( *reinterpret_cast<int *>(&oldValue), 32 );
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return value;
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}
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ID_INLINE float idBitMsg::ReadDeltaFloat( float oldValue, int exponentBits, int mantissaBits ) const {
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int oldBits = idMath::FloatToBits( oldValue, exponentBits, mantissaBits );
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int newBits = ReadDelta( oldBits, 1 + exponentBits + mantissaBits );
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return idMath::BitsToFloat( newBits, exponentBits, mantissaBits );
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}
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/*
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===============================================================================
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idBitMsgDelta
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===============================================================================
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*/
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class idBitMsgDelta {
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public:
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idBitMsgDelta();
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~idBitMsgDelta() {}
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void Init( const idBitMsg *base, idBitMsg *newBase, idBitMsg *delta );
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void Init( const idBitMsg *base, idBitMsg *newBase, const idBitMsg *delta );
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bool HasChanged( void ) const;
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void WriteBits( int value, int numBits );
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void WriteChar( int c );
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void WriteByte( int c );
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void WriteShort( int c );
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void WriteUShort( int c );
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void WriteInt( int c );
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void WriteFloat( float f );
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void WriteFloat( float f, int exponentBits, int mantissaBits );
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void WriteAngle8( float f );
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void WriteAngle16( float f );
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void WriteDir( const idVec3 &dir, int numBits );
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void WriteString( const char *s, int maxLength = -1 );
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void WriteData( const void *data, int length );
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void WriteDict( const idDict &dict );
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void WriteDeltaChar( int oldValue, int newValue );
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void WriteDeltaByte( int oldValue, int newValue );
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void WriteDeltaShort( int oldValue, int newValue );
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void WriteDeltaInt( int oldValue, int newValue );
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void WriteDeltaFloat( float oldValue, float newValue );
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void WriteDeltaFloat( float oldValue, float newValue, int exponentBits, int mantissaBits );
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void WriteDeltaByteCounter( int oldValue, int newValue );
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void WriteDeltaShortCounter( int oldValue, int newValue );
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void WriteDeltaIntCounter( int oldValue, int newValue );
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int ReadBits( int numBits ) const;
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int ReadChar( void ) const;
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int ReadByte( void ) const;
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int ReadShort( void ) const;
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int ReadUShort( void ) const;
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int ReadInt( void ) const;
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float ReadFloat( void ) const;
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float ReadFloat( int exponentBits, int mantissaBits ) const;
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float ReadAngle8( void ) const;
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float ReadAngle16( void ) const;
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idVec3 ReadDir( int numBits ) const;
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void ReadString( char *buffer, int bufferSize ) const;
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void ReadData( void *data, int length ) const;
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void ReadDict( idDict &dict );
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int ReadDeltaChar( int oldValue ) const;
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int ReadDeltaByte( int oldValue ) const;
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int ReadDeltaShort( int oldValue ) const;
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int ReadDeltaInt( int oldValue ) const;
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float ReadDeltaFloat( float oldValue ) const;
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float ReadDeltaFloat( float oldValue, int exponentBits, int mantissaBits ) const;
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int ReadDeltaByteCounter( int oldValue ) const;
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int ReadDeltaShortCounter( int oldValue ) const;
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int ReadDeltaIntCounter( int oldValue ) const;
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private:
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const idBitMsg *base; // base
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idBitMsg * newBase; // new base
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idBitMsg * writeDelta; // delta from base to new base for writing
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const idBitMsg *readDelta; // delta from base to new base for reading
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mutable bool changed; // true if the new base is different from the base
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private:
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void WriteDelta( int oldValue, int newValue, int numBits );
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int ReadDelta( int oldValue, int numBits ) const;
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};
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ID_INLINE idBitMsgDelta::idBitMsgDelta() {
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base = NULL;
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newBase = NULL;
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writeDelta = NULL;
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readDelta = NULL;
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changed = false;
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}
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ID_INLINE void idBitMsgDelta::Init( const idBitMsg *base, idBitMsg *newBase, idBitMsg *delta ) {
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this->base = base;
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this->newBase = newBase;
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this->writeDelta = delta;
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this->readDelta = delta;
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this->changed = false;
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}
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ID_INLINE void idBitMsgDelta::Init( const idBitMsg *base, idBitMsg *newBase, const idBitMsg *delta ) {
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this->base = base;
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this->newBase = newBase;
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this->writeDelta = NULL;
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this->readDelta = delta;
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this->changed = false;
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}
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ID_INLINE bool idBitMsgDelta::HasChanged( void ) const {
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return changed;
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}
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ID_INLINE void idBitMsgDelta::WriteChar( int c ) {
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WriteBits( c, -8 );
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}
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ID_INLINE void idBitMsgDelta::WriteByte( int c ) {
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WriteBits( c, 8 );
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}
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ID_INLINE void idBitMsgDelta::WriteShort( int c ) {
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WriteBits( c, -16 );
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}
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ID_INLINE void idBitMsgDelta::WriteUShort( int c ) {
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WriteBits( c, 16 );
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}
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ID_INLINE void idBitMsgDelta::WriteInt( int c ) {
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WriteBits( c, 32 );
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}
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ID_INLINE void idBitMsgDelta::WriteFloat( float f ) {
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WriteBits( *reinterpret_cast<int *>(&f), 32 );
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}
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ID_INLINE void idBitMsgDelta::WriteFloat( float f, int exponentBits, int mantissaBits ) {
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int bits = idMath::FloatToBits( f, exponentBits, mantissaBits );
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WriteBits( bits, 1 + exponentBits + mantissaBits );
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}
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ID_INLINE void idBitMsgDelta::WriteAngle8( float f ) {
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WriteBits( ANGLE2BYTE( f ), 8 );
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}
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ID_INLINE void idBitMsgDelta::WriteAngle16( float f ) {
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WriteBits( ANGLE2SHORT(f), 16 );
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}
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ID_INLINE void idBitMsgDelta::WriteDir( const idVec3 &dir, int numBits ) {
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WriteBits( idBitMsg::DirToBits( dir, numBits ), numBits );
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}
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ID_INLINE void idBitMsgDelta::WriteDeltaChar( int oldValue, int newValue ) {
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WriteDelta( oldValue, newValue, -8 );
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}
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ID_INLINE void idBitMsgDelta::WriteDeltaByte( int oldValue, int newValue ) {
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WriteDelta( oldValue, newValue, 8 );
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}
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ID_INLINE void idBitMsgDelta::WriteDeltaShort( int oldValue, int newValue ) {
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WriteDelta( oldValue, newValue, -16 );
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}
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ID_INLINE void idBitMsgDelta::WriteDeltaInt( int oldValue, int newValue ) {
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WriteDelta( oldValue, newValue, 32 );
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}
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ID_INLINE void idBitMsgDelta::WriteDeltaFloat( float oldValue, float newValue ) {
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WriteDelta( *reinterpret_cast<int *>(&oldValue), *reinterpret_cast<int *>(&newValue), 32 );
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}
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ID_INLINE void idBitMsgDelta::WriteDeltaFloat( float oldValue, float newValue, int exponentBits, int mantissaBits ) {
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int oldBits = idMath::FloatToBits( oldValue, exponentBits, mantissaBits );
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int newBits = idMath::FloatToBits( newValue, exponentBits, mantissaBits );
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WriteDelta( oldBits, newBits, 1 + exponentBits + mantissaBits );
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}
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ID_INLINE int idBitMsgDelta::ReadChar( void ) const {
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return (signed char)ReadBits( -8 );
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}
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ID_INLINE int idBitMsgDelta::ReadByte( void ) const {
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return (unsigned char)ReadBits( 8 );
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}
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ID_INLINE int idBitMsgDelta::ReadShort( void ) const {
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return (short)ReadBits( -16 );
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}
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ID_INLINE int idBitMsgDelta::ReadUShort( void ) const {
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return (unsigned short)ReadBits( 16 );
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}
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ID_INLINE int idBitMsgDelta::ReadInt( void ) const {
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return ReadBits( 32 );
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}
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ID_INLINE float idBitMsgDelta::ReadFloat( void ) const {
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float value;
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*reinterpret_cast<int *>(&value) = ReadBits( 32 );
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return value;
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}
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ID_INLINE float idBitMsgDelta::ReadFloat( int exponentBits, int mantissaBits ) const {
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int bits = ReadBits( 1 + exponentBits + mantissaBits );
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return idMath::BitsToFloat( bits, exponentBits, mantissaBits );
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}
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ID_INLINE float idBitMsgDelta::ReadAngle8( void ) const {
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return BYTE2ANGLE( ReadByte() );
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}
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ID_INLINE float idBitMsgDelta::ReadAngle16( void ) const {
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return SHORT2ANGLE( ReadShort() );
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}
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ID_INLINE idVec3 idBitMsgDelta::ReadDir( int numBits ) const {
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return idBitMsg::BitsToDir( ReadBits( numBits ), numBits );
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}
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ID_INLINE int idBitMsgDelta::ReadDeltaChar( int oldValue ) const {
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return (signed char)ReadDelta( oldValue, -8 );
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}
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ID_INLINE int idBitMsgDelta::ReadDeltaByte( int oldValue ) const {
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return (unsigned char)ReadDelta( oldValue, 8 );
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}
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ID_INLINE int idBitMsgDelta::ReadDeltaShort( int oldValue ) const {
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return (short)ReadDelta( oldValue, -16 );
|
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}
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ID_INLINE int idBitMsgDelta::ReadDeltaInt( int oldValue ) const {
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return ReadDelta( oldValue, 32 );
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}
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ID_INLINE float idBitMsgDelta::ReadDeltaFloat( float oldValue ) const {
|
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float value;
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*reinterpret_cast<int *>(&value) = ReadDelta( *reinterpret_cast<int *>(&oldValue), 32 );
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return value;
|
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}
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ID_INLINE float idBitMsgDelta::ReadDeltaFloat( float oldValue, int exponentBits, int mantissaBits ) const {
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int oldBits = idMath::FloatToBits( oldValue, exponentBits, mantissaBits );
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int newBits = ReadDelta( oldBits, 1 + exponentBits + mantissaBits );
|
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return idMath::BitsToFloat( newBits, exponentBits, mantissaBits );
|
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}
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#endif /* !__BITMSG_H__ */
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