mirror of
https://github.com/dhewm/dhewm3.git
synced 2024-12-11 21:40:49 +00:00
1067 lines
22 KiB
C++
1067 lines
22 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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#include "sys/platform.h"
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#include "idlib/BitMsg.h"
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/*
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==============================================================================
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idBitMsg
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==============================================================================
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*/
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/*
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================
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idBitMsg::idBitMsg
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================
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*/
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idBitMsg::idBitMsg() {
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writeData = NULL;
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readData = NULL;
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maxSize = 0;
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curSize = 0;
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writeBit = 0;
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readCount = 0;
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readBit = 0;
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allowOverflow = false;
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overflowed = false;
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}
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/*
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================
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idBitMsg::CheckOverflow
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================
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*/
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bool idBitMsg::CheckOverflow( int numBits ) {
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assert( numBits >= 0 );
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if ( numBits > GetRemainingWriteBits() ) {
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if ( !allowOverflow ) {
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idLib::common->FatalError( "idBitMsg: overflow without allowOverflow set" );
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}
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if ( numBits > ( maxSize << 3 ) ) {
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idLib::common->FatalError( "idBitMsg: %i bits is > full message size", numBits );
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}
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idLib::common->Printf( "idBitMsg: overflow\n" );
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BeginWriting();
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overflowed = true;
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return true;
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}
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return false;
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}
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/*
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================
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idBitMsg::GetByteSpace
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================
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*/
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byte *idBitMsg::GetByteSpace( int length ) {
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byte *ptr;
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if ( !writeData ) {
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idLib::common->FatalError( "idBitMsg::GetByteSpace: cannot write to message" );
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}
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// round up to the next byte
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WriteByteAlign();
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// check for overflow
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CheckOverflow( length << 3 );
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ptr = writeData + curSize;
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curSize += length;
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return ptr;
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}
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/*
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================
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idBitMsg::WriteBits
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If the number of bits is negative a sign is included.
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================
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*/
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void idBitMsg::WriteBits( int value, int numBits ) {
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int put;
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int fraction;
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if ( !writeData ) {
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idLib::common->Error( "idBitMsg::WriteBits: cannot write to message" );
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}
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// check if the number of bits is valid
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if ( numBits == 0 || numBits < -31 || numBits > 32 ) {
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idLib::common->Error( "idBitMsg::WriteBits: bad numBits %i", numBits );
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}
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// check for value overflows
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// this should be an error really, as it can go unnoticed and cause either bandwidth or corrupted data transmitted
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if ( numBits != 32 ) {
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if ( numBits > 0 ) {
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if ( value > ( 1 << numBits ) - 1 ) {
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idLib::common->Warning( "idBitMsg::WriteBits: value overflow %d %d", value, numBits );
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} else if ( value < 0 ) {
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idLib::common->Warning( "idBitMsg::WriteBits: value overflow %d %d", value, numBits );
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}
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} else {
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int r = 1 << ( - 1 - numBits );
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if ( value > r - 1 ) {
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idLib::common->Warning( "idBitMsg::WriteBits: value overflow %d %d", value, numBits );
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} else if ( value < -r ) {
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idLib::common->Warning( "idBitMsg::WriteBits: value overflow %d %d", value, numBits );
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}
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}
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}
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if ( numBits < 0 ) {
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numBits = -numBits;
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}
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// check for msg overflow
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if ( CheckOverflow( numBits ) ) {
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return;
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}
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// write the bits
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while( numBits ) {
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if ( writeBit == 0 ) {
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writeData[curSize] = 0;
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curSize++;
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}
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put = 8 - writeBit;
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if ( put > numBits ) {
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put = numBits;
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}
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fraction = value & ( ( 1 << put ) - 1 );
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writeData[curSize - 1] |= fraction << writeBit;
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numBits -= put;
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value >>= put;
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writeBit = ( writeBit + put ) & 7;
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}
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}
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/*
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================
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idBitMsg::WriteString
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================
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*/
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void idBitMsg::WriteString( const char *s, int maxLength, bool make7Bit ) {
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if ( !s ) {
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WriteData( "", 1 );
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} else {
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int i, l;
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byte *dataPtr;
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const byte *bytePtr;
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l = idStr::Length( s );
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if ( maxLength >= 0 && l >= maxLength ) {
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l = maxLength - 1;
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}
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dataPtr = GetByteSpace( l + 1 );
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bytePtr = reinterpret_cast<const byte *>(s);
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if ( make7Bit ) {
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for ( i = 0; i < l; i++ ) {
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if ( bytePtr[i] > 127 ) {
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dataPtr[i] = '.';
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} else {
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dataPtr[i] = bytePtr[i];
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}
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}
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} else {
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for ( i = 0; i < l; i++ ) {
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dataPtr[i] = bytePtr[i];
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}
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}
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dataPtr[i] = '\0';
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}
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}
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/*
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================
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idBitMsg::WriteData
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================
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*/
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void idBitMsg::WriteData( const void *data, int length ) {
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memcpy( GetByteSpace( length ), data, length );
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}
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/*
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================
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idBitMsg::WriteNetadr
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================
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*/
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void idBitMsg::WriteNetadr( const netadr_t adr ) {
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byte *dataPtr;
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dataPtr = GetByteSpace( 4 );
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memcpy( dataPtr, adr.ip, 4 );
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WriteUShort( adr.port );
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}
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/*
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================
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idBitMsg::WriteDelta
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================
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*/
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void idBitMsg::WriteDelta( int oldValue, int newValue, int numBits ) {
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if ( oldValue == newValue ) {
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WriteBits( 0, 1 );
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return;
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}
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WriteBits( 1, 1 );
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WriteBits( newValue, numBits );
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}
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/*
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================
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idBitMsg::WriteDeltaByteCounter
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================
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*/
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void idBitMsg::WriteDeltaByteCounter( int oldValue, int newValue ) {
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int i, x;
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x = oldValue ^ newValue;
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for ( i = 7; i > 0; i-- ) {
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if ( x & ( 1 << i ) ) {
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i++;
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break;
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}
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}
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WriteBits( i, 3 );
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if ( i ) {
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WriteBits( ( ( 1 << i ) - 1 ) & newValue, i );
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}
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}
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/*
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================
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idBitMsg::WriteDeltaShortCounter
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================
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*/
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void idBitMsg::WriteDeltaShortCounter( int oldValue, int newValue ) {
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int i, x;
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x = oldValue ^ newValue;
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for ( i = 15; i > 0; i-- ) {
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if ( x & ( 1 << i ) ) {
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i++;
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break;
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}
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}
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WriteBits( i, 4 );
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if ( i ) {
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WriteBits( ( ( 1 << i ) - 1 ) & newValue, i );
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}
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}
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/*
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================
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idBitMsg::WriteDeltaIntCounter
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================
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*/
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void idBitMsg::WriteDeltaIntCounter( int oldValue, int newValue ) {
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int i, x;
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x = oldValue ^ newValue;
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for ( i = 31; i > 0; i-- ) {
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if ( x & ( 1 << i ) ) {
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i++;
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break;
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}
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}
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WriteBits( i, 5 );
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if ( i ) {
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WriteBits( ( ( 1 << i ) - 1 ) & newValue, i );
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}
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}
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/*
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==================
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idBitMsg::WriteDeltaDict
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==================
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*/
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bool idBitMsg::WriteDeltaDict( const idDict &dict, const idDict *base ) {
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int i;
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const idKeyValue *kv, *basekv;
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bool changed = false;
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if ( base != NULL ) {
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for ( i = 0; i < dict.GetNumKeyVals(); i++ ) {
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kv = dict.GetKeyVal( i );
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basekv = base->FindKey( kv->GetKey() );
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if ( basekv == NULL || basekv->GetValue().Icmp( kv->GetValue() ) != 0 ) {
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WriteString( kv->GetKey() );
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WriteString( kv->GetValue() );
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changed = true;
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}
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}
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WriteString( "" );
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for ( i = 0; i < base->GetNumKeyVals(); i++ ) {
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basekv = base->GetKeyVal( i );
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kv = dict.FindKey( basekv->GetKey() );
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if ( kv == NULL ) {
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WriteString( basekv->GetKey() );
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changed = true;
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}
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}
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WriteString( "" );
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} else {
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for ( i = 0; i < dict.GetNumKeyVals(); i++ ) {
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kv = dict.GetKeyVal( i );
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WriteString( kv->GetKey() );
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WriteString( kv->GetValue() );
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changed = true;
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}
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WriteString( "" );
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WriteString( "" );
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}
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return changed;
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}
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/*
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================
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idBitMsg::ReadBits
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If the number of bits is negative a sign is included.
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================
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*/
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int idBitMsg::ReadBits( int numBits ) const {
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int value;
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int valueBits;
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int get;
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int fraction;
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bool sgn;
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if ( !readData ) {
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idLib::common->FatalError( "idBitMsg::ReadBits: cannot read from message" );
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}
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// check if the number of bits is valid
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if ( numBits == 0 || numBits < -31 || numBits > 32 ) {
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idLib::common->FatalError( "idBitMsg::ReadBits: bad numBits %i", numBits );
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}
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value = 0;
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valueBits = 0;
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if ( numBits < 0 ) {
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numBits = -numBits;
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sgn = true;
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} else {
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sgn = false;
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}
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// check for overflow
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if ( numBits > GetRemainingReadBits() ) {
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return -1;
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}
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while ( valueBits < numBits ) {
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if ( readBit == 0 ) {
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readCount++;
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}
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get = 8 - readBit;
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if ( get > (numBits - valueBits) ) {
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get = numBits - valueBits;
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}
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fraction = readData[readCount - 1];
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fraction >>= readBit;
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fraction &= ( 1 << get ) - 1;
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value |= fraction << valueBits;
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valueBits += get;
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readBit = ( readBit + get ) & 7;
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}
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if ( sgn ) {
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if ( value & ( 1 << ( numBits - 1 ) ) ) {
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value |= -1 ^ ( ( 1 << numBits ) - 1 );
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}
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}
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return value;
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}
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/*
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================
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idBitMsg::ReadString
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================
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*/
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int idBitMsg::ReadString( char *buffer, int bufferSize ) const {
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int l, c;
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ReadByteAlign();
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l = 0;
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while( 1 ) {
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c = ReadByte();
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if ( c <= 0 || c >= 255 ) {
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break;
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}
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// translate all fmt spec to avoid crash bugs in string routines
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if ( c == '%' ) {
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c = '.';
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}
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// we will read past any excessively long string, so
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// the following data can be read, but the string will
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// be truncated
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if ( l < bufferSize - 1 ) {
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buffer[l] = c;
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l++;
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}
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}
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buffer[l] = 0;
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return l;
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}
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/*
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================
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idBitMsg::ReadData
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================
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*/
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int idBitMsg::ReadData( void *data, int length ) const {
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int cnt;
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ReadByteAlign();
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cnt = readCount;
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if ( readCount + length > curSize ) {
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if ( data ) {
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memcpy( data, readData + readCount, GetRemaingData() );
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}
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readCount = curSize;
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} else {
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if ( data ) {
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memcpy( data, readData + readCount, length );
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}
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readCount += length;
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}
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return ( readCount - cnt );
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}
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/*
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================
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idBitMsg::ReadNetadr
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================
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*/
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void idBitMsg::ReadNetadr( netadr_t *adr ) const {
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int i;
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adr->type = NA_IP;
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for ( i = 0; i < 4; i++ ) {
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adr->ip[ i ] = ReadByte();
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}
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adr->port = ReadUShort();
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}
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/*
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================
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idBitMsg::ReadDelta
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================
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*/
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int idBitMsg::ReadDelta( int oldValue, int numBits ) const {
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if ( ReadBits( 1 ) ) {
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return ReadBits( numBits );
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}
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return oldValue;
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}
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/*
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================
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idBitMsg::ReadDeltaByteCounter
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================
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*/
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int idBitMsg::ReadDeltaByteCounter( int oldValue ) const {
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int i, newValue;
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i = ReadBits( 3 );
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if ( !i ) {
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return oldValue;
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}
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newValue = ReadBits( i );
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return ( (oldValue & ~( ( 1 << i ) - 1 ) ) | newValue );
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}
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/*
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================
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idBitMsg::ReadDeltaShortCounter
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================
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*/
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int idBitMsg::ReadDeltaShortCounter( int oldValue ) const {
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int i, newValue;
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i = ReadBits( 4 );
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if ( !i ) {
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return oldValue;
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}
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newValue = ReadBits( i );
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return ( (oldValue & ~( ( 1 << i ) - 1 ) ) | newValue );
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}
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/*
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================
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idBitMsg::ReadDeltaIntCounter
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================
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*/
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int idBitMsg::ReadDeltaIntCounter( int oldValue ) const {
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int i, newValue;
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i = ReadBits( 5 );
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if ( !i ) {
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return oldValue;
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}
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newValue = ReadBits( i );
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return ( ( oldValue & ~( ( 1 << i ) - 1 ) ) | newValue );
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}
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/*
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==================
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idBitMsg::ReadDeltaDict
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==================
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*/
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bool idBitMsg::ReadDeltaDict( idDict &dict, const idDict *base ) const {
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char key[MAX_STRING_CHARS];
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char value[MAX_STRING_CHARS];
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bool changed = false;
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if ( base != NULL ) {
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dict = *base;
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} else {
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dict.Clear();
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}
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while( ReadString( key, sizeof( key ) ) != 0 ) {
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ReadString( value, sizeof( value ) );
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dict.Set( key, value );
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changed = true;
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}
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while( ReadString( key, sizeof( key ) ) != 0 ) {
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dict.Delete( key );
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changed = true;
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}
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return changed;
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}
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/*
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================
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idBitMsg::DirToBits
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================
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*/
|
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int idBitMsg::DirToBits( const idVec3 &dir, int numBits ) {
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int max, bits;
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float bias;
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assert( numBits >= 6 && numBits <= 32 );
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assert( dir.LengthSqr() - 1.0f < 0.01f );
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numBits /= 3;
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max = ( 1 << ( numBits - 1 ) ) - 1;
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bias = 0.5f / max;
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bits = FLOATSIGNBITSET( dir.x ) << ( numBits * 3 - 1 );
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bits |= ( idMath::Ftoi( ( idMath::Fabs( dir.x ) + bias ) * max ) ) << ( numBits * 2 );
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bits |= FLOATSIGNBITSET( dir.y ) << ( numBits * 2 - 1 );
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bits |= ( idMath::Ftoi( ( idMath::Fabs( dir.y ) + bias ) * max ) ) << ( numBits * 1 );
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|
bits |= FLOATSIGNBITSET( dir.z ) << ( numBits * 1 - 1 );
|
|
bits |= ( idMath::Ftoi( ( idMath::Fabs( dir.z ) + bias ) * max ) ) << ( numBits * 0 );
|
|
return bits;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::BitsToDir
|
|
================
|
|
*/
|
|
idVec3 idBitMsg::BitsToDir( int bits, int numBits ) {
|
|
static float sign[2] = { 1.0f, -1.0f };
|
|
int max;
|
|
float invMax;
|
|
idVec3 dir;
|
|
|
|
assert( numBits >= 6 && numBits <= 32 );
|
|
|
|
numBits /= 3;
|
|
max = ( 1 << ( numBits - 1 ) ) - 1;
|
|
invMax = 1.0f / max;
|
|
|
|
dir.x = sign[( bits >> ( numBits * 3 - 1 ) ) & 1] * ( ( bits >> ( numBits * 2 ) ) & max ) * invMax;
|
|
dir.y = sign[( bits >> ( numBits * 2 - 1 ) ) & 1] * ( ( bits >> ( numBits * 1 ) ) & max ) * invMax;
|
|
dir.z = sign[( bits >> ( numBits * 1 - 1 ) ) & 1] * ( ( bits >> ( numBits * 0 ) ) & max ) * invMax;
|
|
dir.NormalizeFast();
|
|
return dir;
|
|
}
|
|
|
|
|
|
/*
|
|
==============================================================================
|
|
|
|
idBitMsgDelta
|
|
|
|
==============================================================================
|
|
*/
|
|
|
|
const int MAX_DATA_BUFFER = 1024;
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::WriteBits
|
|
================
|
|
*/
|
|
void idBitMsgDelta::WriteBits( int value, int numBits ) {
|
|
if ( newBase ) {
|
|
newBase->WriteBits( value, numBits );
|
|
}
|
|
|
|
if ( !base ) {
|
|
writeDelta->WriteBits( value, numBits );
|
|
changed = true;
|
|
} else {
|
|
int baseValue = base->ReadBits( numBits );
|
|
if ( baseValue == value ) {
|
|
writeDelta->WriteBits( 0, 1 );
|
|
} else {
|
|
writeDelta->WriteBits( 1, 1 );
|
|
writeDelta->WriteBits( value, numBits );
|
|
changed = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::WriteDelta
|
|
================
|
|
*/
|
|
void idBitMsgDelta::WriteDelta( int oldValue, int newValue, int numBits ) {
|
|
if ( newBase ) {
|
|
newBase->WriteBits( newValue, numBits );
|
|
}
|
|
|
|
if ( !base ) {
|
|
if ( oldValue == newValue ) {
|
|
writeDelta->WriteBits( 0, 1 );
|
|
} else {
|
|
writeDelta->WriteBits( 1, 1 );
|
|
writeDelta->WriteBits( newValue, numBits );
|
|
}
|
|
changed = true;
|
|
} else {
|
|
int baseValue = base->ReadBits( numBits );
|
|
if ( baseValue == newValue ) {
|
|
writeDelta->WriteBits( 0, 1 );
|
|
} else {
|
|
writeDelta->WriteBits( 1, 1 );
|
|
if ( oldValue == newValue ) {
|
|
writeDelta->WriteBits( 0, 1 );
|
|
changed = true;
|
|
} else {
|
|
writeDelta->WriteBits( 1, 1 );
|
|
writeDelta->WriteBits( newValue, numBits );
|
|
changed = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::ReadBits
|
|
================
|
|
*/
|
|
int idBitMsgDelta::ReadBits( int numBits ) const {
|
|
int value;
|
|
|
|
if ( !base ) {
|
|
value = readDelta->ReadBits( numBits );
|
|
changed = true;
|
|
} else {
|
|
int baseValue = base->ReadBits( numBits );
|
|
if ( !readDelta || readDelta->ReadBits( 1 ) == 0 ) {
|
|
value = baseValue;
|
|
} else {
|
|
value = readDelta->ReadBits( numBits );
|
|
changed = true;
|
|
}
|
|
}
|
|
|
|
if ( newBase ) {
|
|
newBase->WriteBits( value, numBits );
|
|
}
|
|
return value;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::ReadDelta
|
|
================
|
|
*/
|
|
int idBitMsgDelta::ReadDelta( int oldValue, int numBits ) const {
|
|
int value;
|
|
|
|
if ( !base ) {
|
|
if ( readDelta->ReadBits( 1 ) == 0 ) {
|
|
value = oldValue;
|
|
} else {
|
|
value = readDelta->ReadBits( numBits );
|
|
}
|
|
changed = true;
|
|
} else {
|
|
int baseValue = base->ReadBits( numBits );
|
|
if ( !readDelta || readDelta->ReadBits( 1 ) == 0 ) {
|
|
value = baseValue;
|
|
} else if ( readDelta->ReadBits( 1 ) == 0 ) {
|
|
value = oldValue;
|
|
changed = true;
|
|
} else {
|
|
value = readDelta->ReadBits( numBits );
|
|
changed = true;
|
|
}
|
|
}
|
|
|
|
if ( newBase ) {
|
|
newBase->WriteBits( value, numBits );
|
|
}
|
|
return value;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::WriteString
|
|
================
|
|
*/
|
|
void idBitMsgDelta::WriteString( const char *s, int maxLength ) {
|
|
if ( newBase ) {
|
|
newBase->WriteString( s, maxLength );
|
|
}
|
|
|
|
if ( !base ) {
|
|
writeDelta->WriteString( s, maxLength );
|
|
changed = true;
|
|
} else {
|
|
char baseString[MAX_DATA_BUFFER];
|
|
base->ReadString( baseString, sizeof( baseString ) );
|
|
if ( idStr::Cmp( s, baseString ) == 0 ) {
|
|
writeDelta->WriteBits( 0, 1 );
|
|
} else {
|
|
writeDelta->WriteBits( 1, 1 );
|
|
writeDelta->WriteString( s, maxLength );
|
|
changed = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::WriteData
|
|
================
|
|
*/
|
|
void idBitMsgDelta::WriteData( const void *data, int length ) {
|
|
if ( newBase ) {
|
|
newBase->WriteData( data, length );
|
|
}
|
|
|
|
if ( !base ) {
|
|
writeDelta->WriteData( data, length );
|
|
changed = true;
|
|
} else {
|
|
byte baseData[MAX_DATA_BUFFER];
|
|
assert( length < sizeof( baseData ) );
|
|
base->ReadData( baseData, length );
|
|
if ( memcmp( data, baseData, length ) == 0 ) {
|
|
writeDelta->WriteBits( 0, 1 );
|
|
} else {
|
|
writeDelta->WriteBits( 1, 1 );
|
|
writeDelta->WriteData( data, length );
|
|
changed = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::WriteDict
|
|
================
|
|
*/
|
|
void idBitMsgDelta::WriteDict( const idDict &dict ) {
|
|
if ( newBase ) {
|
|
newBase->WriteDeltaDict( dict, NULL );
|
|
}
|
|
|
|
if ( !base ) {
|
|
writeDelta->WriteDeltaDict( dict, NULL );
|
|
changed = true;
|
|
} else {
|
|
idDict baseDict;
|
|
base->ReadDeltaDict( baseDict, NULL );
|
|
changed = writeDelta->WriteDeltaDict( dict, &baseDict );
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::WriteDeltaByteCounter
|
|
================
|
|
*/
|
|
void idBitMsgDelta::WriteDeltaByteCounter( int oldValue, int newValue ) {
|
|
if ( newBase ) {
|
|
newBase->WriteBits( newValue, 8 );
|
|
}
|
|
|
|
if ( !base ) {
|
|
writeDelta->WriteDeltaByteCounter( oldValue, newValue );
|
|
changed = true;
|
|
} else {
|
|
int baseValue = base->ReadBits( 8 );
|
|
if ( baseValue == newValue ) {
|
|
writeDelta->WriteBits( 0, 1 );
|
|
} else {
|
|
writeDelta->WriteBits( 1, 1 );
|
|
writeDelta->WriteDeltaByteCounter( oldValue, newValue );
|
|
changed = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::WriteDeltaShortCounter
|
|
================
|
|
*/
|
|
void idBitMsgDelta::WriteDeltaShortCounter( int oldValue, int newValue ) {
|
|
if ( newBase ) {
|
|
newBase->WriteBits( newValue, 16 );
|
|
}
|
|
|
|
if ( !base ) {
|
|
writeDelta->WriteDeltaShortCounter( oldValue, newValue );
|
|
changed = true;
|
|
} else {
|
|
int baseValue = base->ReadBits( 16 );
|
|
if ( baseValue == newValue ) {
|
|
writeDelta->WriteBits( 0, 1 );
|
|
} else {
|
|
writeDelta->WriteBits( 1, 1 );
|
|
writeDelta->WriteDeltaShortCounter( oldValue, newValue );
|
|
changed = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::WriteDeltaIntCounter
|
|
================
|
|
*/
|
|
void idBitMsgDelta::WriteDeltaIntCounter( int oldValue, int newValue ) {
|
|
if ( newBase ) {
|
|
newBase->WriteBits( newValue, 32 );
|
|
}
|
|
|
|
if ( !base ) {
|
|
writeDelta->WriteDeltaIntCounter( oldValue, newValue );
|
|
changed = true;
|
|
} else {
|
|
int baseValue = base->ReadBits( 32 );
|
|
if ( baseValue == newValue ) {
|
|
writeDelta->WriteBits( 0, 1 );
|
|
} else {
|
|
writeDelta->WriteBits( 1, 1 );
|
|
writeDelta->WriteDeltaIntCounter( oldValue, newValue );
|
|
changed = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::ReadString
|
|
================
|
|
*/
|
|
void idBitMsgDelta::ReadString( char *buffer, int bufferSize ) const {
|
|
if ( !base ) {
|
|
readDelta->ReadString( buffer, bufferSize );
|
|
changed = true;
|
|
} else {
|
|
char baseString[MAX_DATA_BUFFER];
|
|
base->ReadString( baseString, sizeof( baseString ) );
|
|
if ( !readDelta || readDelta->ReadBits( 1 ) == 0 ) {
|
|
idStr::Copynz( buffer, baseString, bufferSize );
|
|
} else {
|
|
readDelta->ReadString( buffer, bufferSize );
|
|
changed = true;
|
|
}
|
|
}
|
|
|
|
if ( newBase ) {
|
|
newBase->WriteString( buffer );
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::ReadData
|
|
================
|
|
*/
|
|
void idBitMsgDelta::ReadData( void *data, int length ) const {
|
|
if ( !base ) {
|
|
readDelta->ReadData( data, length );
|
|
changed = true;
|
|
} else {
|
|
char baseData[MAX_DATA_BUFFER];
|
|
assert( length < sizeof( baseData ) );
|
|
base->ReadData( baseData, length );
|
|
if ( !readDelta || readDelta->ReadBits( 1 ) == 0 ) {
|
|
memcpy( data, baseData, length );
|
|
} else {
|
|
readDelta->ReadData( data, length );
|
|
changed = true;
|
|
}
|
|
}
|
|
|
|
if ( newBase ) {
|
|
newBase->WriteData( data, length );
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::ReadDict
|
|
================
|
|
*/
|
|
void idBitMsgDelta::ReadDict( idDict &dict ) {
|
|
if ( !base ) {
|
|
readDelta->ReadDeltaDict( dict, NULL );
|
|
changed = true;
|
|
} else {
|
|
idDict baseDict;
|
|
base->ReadDeltaDict( baseDict, NULL );
|
|
if ( !readDelta ) {
|
|
dict = baseDict;
|
|
} else {
|
|
changed = readDelta->ReadDeltaDict( dict, &baseDict );
|
|
}
|
|
}
|
|
|
|
if ( newBase ) {
|
|
newBase->WriteDeltaDict( dict, NULL );
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::ReadDeltaByteCounter
|
|
================
|
|
*/
|
|
int idBitMsgDelta::ReadDeltaByteCounter( int oldValue ) const {
|
|
int value;
|
|
|
|
if ( !base ) {
|
|
value = readDelta->ReadDeltaByteCounter( oldValue );
|
|
changed = true;
|
|
} else {
|
|
int baseValue = base->ReadBits( 8 );
|
|
if ( !readDelta || readDelta->ReadBits( 1 ) == 0 ) {
|
|
value = baseValue;
|
|
} else {
|
|
value = readDelta->ReadDeltaByteCounter( oldValue );
|
|
changed = true;
|
|
}
|
|
}
|
|
|
|
if ( newBase ) {
|
|
newBase->WriteBits( value, 8 );
|
|
}
|
|
return value;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::ReadDeltaShortCounter
|
|
================
|
|
*/
|
|
int idBitMsgDelta::ReadDeltaShortCounter( int oldValue ) const {
|
|
int value;
|
|
|
|
if ( !base ) {
|
|
value = readDelta->ReadDeltaShortCounter( oldValue );
|
|
changed = true;
|
|
} else {
|
|
int baseValue = base->ReadBits( 16 );
|
|
if ( !readDelta || readDelta->ReadBits( 1 ) == 0 ) {
|
|
value = baseValue;
|
|
} else {
|
|
value = readDelta->ReadDeltaShortCounter( oldValue );
|
|
changed = true;
|
|
}
|
|
}
|
|
|
|
if ( newBase ) {
|
|
newBase->WriteBits( value, 16 );
|
|
}
|
|
return value;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsgDelta::ReadDeltaIntCounter
|
|
================
|
|
*/
|
|
int idBitMsgDelta::ReadDeltaIntCounter( int oldValue ) const {
|
|
int value;
|
|
|
|
if ( !base ) {
|
|
value = readDelta->ReadDeltaIntCounter( oldValue );
|
|
changed = true;
|
|
} else {
|
|
int baseValue = base->ReadBits( 32 );
|
|
if ( !readDelta || readDelta->ReadBits( 1 ) == 0 ) {
|
|
value = baseValue;
|
|
} else {
|
|
value = readDelta->ReadDeltaIntCounter( oldValue );
|
|
changed = true;
|
|
}
|
|
}
|
|
|
|
if ( newBase ) {
|
|
newBase->WriteBits( value, 32 );
|
|
}
|
|
return value;
|
|
}
|