mirror of
https://github.com/dhewm/dhewm3.git
synced 2024-11-23 21:02:11 +00:00
1067 lines
22 KiB
C++
1067 lines
22 KiB
C++
/*
|
|
===========================================================================
|
|
|
|
Doom 3 GPL Source Code
|
|
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
|
|
|
|
This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").
|
|
|
|
Doom 3 Source Code is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
Doom 3 Source Code is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
===========================================================================
|
|
*/
|
|
|
|
#include "precompiled.h"
|
|
#pragma hdrstop
|
|
|
|
|
|
/*
|
|
==============================================================================
|
|
|
|
idBitMsg
|
|
|
|
==============================================================================
|
|
*/
|
|
|
|
/*
|
|
================
|
|
idBitMsg::idBitMsg
|
|
================
|
|
*/
|
|
idBitMsg::idBitMsg() {
|
|
writeData = NULL;
|
|
readData = NULL;
|
|
maxSize = 0;
|
|
curSize = 0;
|
|
writeBit = 0;
|
|
readCount = 0;
|
|
readBit = 0;
|
|
allowOverflow = false;
|
|
overflowed = false;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::CheckOverflow
|
|
================
|
|
*/
|
|
bool idBitMsg::CheckOverflow( int numBits ) {
|
|
assert( numBits >= 0 );
|
|
if ( numBits > GetRemainingWriteBits() ) {
|
|
if ( !allowOverflow ) {
|
|
idLib::common->FatalError( "idBitMsg: overflow without allowOverflow set" );
|
|
}
|
|
if ( numBits > ( maxSize << 3 ) ) {
|
|
idLib::common->FatalError( "idBitMsg: %i bits is > full message size", numBits );
|
|
}
|
|
idLib::common->Printf( "idBitMsg: overflow\n" );
|
|
BeginWriting();
|
|
overflowed = true;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::GetByteSpace
|
|
================
|
|
*/
|
|
byte *idBitMsg::GetByteSpace( int length ) {
|
|
byte *ptr;
|
|
|
|
if ( !writeData ) {
|
|
idLib::common->FatalError( "idBitMsg::GetByteSpace: cannot write to message" );
|
|
}
|
|
|
|
// round up to the next byte
|
|
WriteByteAlign();
|
|
|
|
// check for overflow
|
|
CheckOverflow( length << 3 );
|
|
|
|
ptr = writeData + curSize;
|
|
curSize += length;
|
|
return ptr;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::WriteBits
|
|
|
|
If the number of bits is negative a sign is included.
|
|
================
|
|
*/
|
|
void idBitMsg::WriteBits( int value, int numBits ) {
|
|
int put;
|
|
int fraction;
|
|
|
|
if ( !writeData ) {
|
|
idLib::common->Error( "idBitMsg::WriteBits: cannot write to message" );
|
|
}
|
|
|
|
// check if the number of bits is valid
|
|
if ( numBits == 0 || numBits < -31 || numBits > 32 ) {
|
|
idLib::common->Error( "idBitMsg::WriteBits: bad numBits %i", numBits );
|
|
}
|
|
|
|
// check for value overflows
|
|
// this should be an error really, as it can go unnoticed and cause either bandwidth or corrupted data transmitted
|
|
if ( numBits != 32 ) {
|
|
if ( numBits > 0 ) {
|
|
if ( value > ( 1 << numBits ) - 1 ) {
|
|
idLib::common->Warning( "idBitMsg::WriteBits: value overflow %d %d", value, numBits );
|
|
} else if ( value < 0 ) {
|
|
idLib::common->Warning( "idBitMsg::WriteBits: value overflow %d %d", value, numBits );
|
|
}
|
|
} else {
|
|
int r = 1 << ( - 1 - numBits );
|
|
if ( value > r - 1 ) {
|
|
idLib::common->Warning( "idBitMsg::WriteBits: value overflow %d %d", value, numBits );
|
|
} else if ( value < -r ) {
|
|
idLib::common->Warning( "idBitMsg::WriteBits: value overflow %d %d", value, numBits );
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( numBits < 0 ) {
|
|
numBits = -numBits;
|
|
}
|
|
|
|
// check for msg overflow
|
|
if ( CheckOverflow( numBits ) ) {
|
|
return;
|
|
}
|
|
|
|
// write the bits
|
|
while( numBits ) {
|
|
if ( writeBit == 0 ) {
|
|
writeData[curSize] = 0;
|
|
curSize++;
|
|
}
|
|
put = 8 - writeBit;
|
|
if ( put > numBits ) {
|
|
put = numBits;
|
|
}
|
|
fraction = value & ( ( 1 << put ) - 1 );
|
|
writeData[curSize - 1] |= fraction << writeBit;
|
|
numBits -= put;
|
|
value >>= put;
|
|
writeBit = ( writeBit + put ) & 7;
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::WriteString
|
|
================
|
|
*/
|
|
void idBitMsg::WriteString( const char *s, int maxLength, bool make7Bit ) {
|
|
if ( !s ) {
|
|
WriteData( "", 1 );
|
|
} else {
|
|
int i, l;
|
|
byte *dataPtr;
|
|
const byte *bytePtr;
|
|
|
|
l = idStr::Length( s );
|
|
if ( maxLength >= 0 && l >= maxLength ) {
|
|
l = maxLength - 1;
|
|
}
|
|
dataPtr = GetByteSpace( l + 1 );
|
|
bytePtr = reinterpret_cast<const byte *>(s);
|
|
if ( make7Bit ) {
|
|
for ( i = 0; i < l; i++ ) {
|
|
if ( bytePtr[i] > 127 ) {
|
|
dataPtr[i] = '.';
|
|
} else {
|
|
dataPtr[i] = bytePtr[i];
|
|
}
|
|
}
|
|
} else {
|
|
for ( i = 0; i < l; i++ ) {
|
|
dataPtr[i] = bytePtr[i];
|
|
}
|
|
}
|
|
dataPtr[i] = '\0';
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::WriteData
|
|
================
|
|
*/
|
|
void idBitMsg::WriteData( const void *data, int length ) {
|
|
memcpy( GetByteSpace( length ), data, length );
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::WriteNetadr
|
|
================
|
|
*/
|
|
void idBitMsg::WriteNetadr( const netadr_t adr ) {
|
|
byte *dataPtr;
|
|
dataPtr = GetByteSpace( 4 );
|
|
memcpy( dataPtr, adr.ip, 4 );
|
|
WriteUShort( adr.port );
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::WriteDelta
|
|
================
|
|
*/
|
|
void idBitMsg::WriteDelta( int oldValue, int newValue, int numBits ) {
|
|
if ( oldValue == newValue ) {
|
|
WriteBits( 0, 1 );
|
|
return;
|
|
}
|
|
WriteBits( 1, 1 );
|
|
WriteBits( newValue, numBits );
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::WriteDeltaByteCounter
|
|
================
|
|
*/
|
|
void idBitMsg::WriteDeltaByteCounter( int oldValue, int newValue ) {
|
|
int i, x;
|
|
|
|
x = oldValue ^ newValue;
|
|
for ( i = 7; i > 0; i-- ) {
|
|
if ( x & ( 1 << i ) ) {
|
|
i++;
|
|
break;
|
|
}
|
|
}
|
|
WriteBits( i, 3 );
|
|
if ( i ) {
|
|
WriteBits( ( ( 1 << i ) - 1 ) & newValue, i );
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::WriteDeltaShortCounter
|
|
================
|
|
*/
|
|
void idBitMsg::WriteDeltaShortCounter( int oldValue, int newValue ) {
|
|
int i, x;
|
|
|
|
x = oldValue ^ newValue;
|
|
for ( i = 15; i > 0; i-- ) {
|
|
if ( x & ( 1 << i ) ) {
|
|
i++;
|
|
break;
|
|
}
|
|
}
|
|
WriteBits( i, 4 );
|
|
if ( i ) {
|
|
WriteBits( ( ( 1 << i ) - 1 ) & newValue, i );
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::WriteDeltaLongCounter
|
|
================
|
|
*/
|
|
void idBitMsg::WriteDeltaLongCounter( int oldValue, int newValue ) {
|
|
int i, x;
|
|
|
|
x = oldValue ^ newValue;
|
|
for ( i = 31; i > 0; i-- ) {
|
|
if ( x & ( 1 << i ) ) {
|
|
i++;
|
|
break;
|
|
}
|
|
}
|
|
WriteBits( i, 5 );
|
|
if ( i ) {
|
|
WriteBits( ( ( 1 << i ) - 1 ) & newValue, i );
|
|
}
|
|
}
|
|
|
|
/*
|
|
==================
|
|
idBitMsg::WriteDeltaDict
|
|
==================
|
|
*/
|
|
bool idBitMsg::WriteDeltaDict( const idDict &dict, const idDict *base ) {
|
|
int i;
|
|
const idKeyValue *kv, *basekv;
|
|
bool changed = false;
|
|
|
|
if ( base != NULL ) {
|
|
|
|
for ( i = 0; i < dict.GetNumKeyVals(); i++ ) {
|
|
kv = dict.GetKeyVal( i );
|
|
basekv = base->FindKey( kv->GetKey() );
|
|
if ( basekv == NULL || basekv->GetValue().Icmp( kv->GetValue() ) != 0 ) {
|
|
WriteString( kv->GetKey() );
|
|
WriteString( kv->GetValue() );
|
|
changed = true;
|
|
}
|
|
}
|
|
|
|
WriteString( "" );
|
|
|
|
for ( i = 0; i < base->GetNumKeyVals(); i++ ) {
|
|
basekv = base->GetKeyVal( i );
|
|
kv = dict.FindKey( basekv->GetKey() );
|
|
if ( kv == NULL ) {
|
|
WriteString( basekv->GetKey() );
|
|
changed = true;
|
|
}
|
|
}
|
|
|
|
WriteString( "" );
|
|
|
|
} else {
|
|
|
|
for ( i = 0; i < dict.GetNumKeyVals(); i++ ) {
|
|
kv = dict.GetKeyVal( i );
|
|
WriteString( kv->GetKey() );
|
|
WriteString( kv->GetValue() );
|
|
changed = true;
|
|
}
|
|
WriteString( "" );
|
|
|
|
WriteString( "" );
|
|
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::ReadBits
|
|
|
|
If the number of bits is negative a sign is included.
|
|
================
|
|
*/
|
|
int idBitMsg::ReadBits( int numBits ) const {
|
|
int value;
|
|
int valueBits;
|
|
int get;
|
|
int fraction;
|
|
bool sgn;
|
|
|
|
if ( !readData ) {
|
|
idLib::common->FatalError( "idBitMsg::ReadBits: cannot read from message" );
|
|
}
|
|
|
|
// check if the number of bits is valid
|
|
if ( numBits == 0 || numBits < -31 || numBits > 32 ) {
|
|
idLib::common->FatalError( "idBitMsg::ReadBits: bad numBits %i", numBits );
|
|
}
|
|
|
|
value = 0;
|
|
valueBits = 0;
|
|
|
|
if ( numBits < 0 ) {
|
|
numBits = -numBits;
|
|
sgn = true;
|
|
} else {
|
|
sgn = false;
|
|
}
|
|
|
|
// check for overflow
|
|
if ( numBits > GetRemainingReadBits() ) {
|
|
return -1;
|
|
}
|
|
|
|
while ( valueBits < numBits ) {
|
|
if ( readBit == 0 ) {
|
|
readCount++;
|
|
}
|
|
get = 8 - readBit;
|
|
if ( get > (numBits - valueBits) ) {
|
|
get = numBits - valueBits;
|
|
}
|
|
fraction = readData[readCount - 1];
|
|
fraction >>= readBit;
|
|
fraction &= ( 1 << get ) - 1;
|
|
value |= fraction << valueBits;
|
|
|
|
valueBits += get;
|
|
readBit = ( readBit + get ) & 7;
|
|
}
|
|
|
|
if ( sgn ) {
|
|
if ( value & ( 1 << ( numBits - 1 ) ) ) {
|
|
value |= -1 ^ ( ( 1 << numBits ) - 1 );
|
|
}
|
|
}
|
|
|
|
return value;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::ReadString
|
|
================
|
|
*/
|
|
int idBitMsg::ReadString( char *buffer, int bufferSize ) const {
|
|
int l, c;
|
|
|
|
ReadByteAlign();
|
|
l = 0;
|
|
while( 1 ) {
|
|
c = ReadByte();
|
|
if ( c <= 0 || c >= 255 ) {
|
|
break;
|
|
}
|
|
// translate all fmt spec to avoid crash bugs in string routines
|
|
if ( c == '%' ) {
|
|
c = '.';
|
|
}
|
|
|
|
// we will read past any excessively long string, so
|
|
// the following data can be read, but the string will
|
|
// be truncated
|
|
if ( l < bufferSize - 1 ) {
|
|
buffer[l] = c;
|
|
l++;
|
|
}
|
|
}
|
|
|
|
buffer[l] = 0;
|
|
return l;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::ReadData
|
|
================
|
|
*/
|
|
int idBitMsg::ReadData( void *data, int length ) const {
|
|
int cnt;
|
|
|
|
ReadByteAlign();
|
|
cnt = readCount;
|
|
|
|
if ( readCount + length > curSize ) {
|
|
if ( data ) {
|
|
memcpy( data, readData + readCount, GetRemaingData() );
|
|
}
|
|
readCount = curSize;
|
|
} else {
|
|
if ( data ) {
|
|
memcpy( data, readData + readCount, length );
|
|
}
|
|
readCount += length;
|
|
}
|
|
|
|
return ( readCount - cnt );
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::ReadNetadr
|
|
================
|
|
*/
|
|
void idBitMsg::ReadNetadr( netadr_t *adr ) const {
|
|
int i;
|
|
|
|
adr->type = NA_IP;
|
|
for ( i = 0; i < 4; i++ ) {
|
|
adr->ip[ i ] = ReadByte();
|
|
}
|
|
adr->port = ReadUShort();
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::ReadDelta
|
|
================
|
|
*/
|
|
int idBitMsg::ReadDelta( int oldValue, int numBits ) const {
|
|
if ( ReadBits( 1 ) ) {
|
|
return ReadBits( numBits );
|
|
}
|
|
return oldValue;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::ReadDeltaByteCounter
|
|
================
|
|
*/
|
|
int idBitMsg::ReadDeltaByteCounter( int oldValue ) const {
|
|
int i, newValue;
|
|
|
|
i = ReadBits( 3 );
|
|
if ( !i ) {
|
|
return oldValue;
|
|
}
|
|
newValue = ReadBits( i );
|
|
return ( oldValue & ~( ( 1 << i ) - 1 ) | newValue );
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::ReadDeltaShortCounter
|
|
================
|
|
*/
|
|
int idBitMsg::ReadDeltaShortCounter( int oldValue ) const {
|
|
int i, newValue;
|
|
|
|
i = ReadBits( 4 );
|
|
if ( !i ) {
|
|
return oldValue;
|
|
}
|
|
newValue = ReadBits( i );
|
|
return ( oldValue & ~( ( 1 << i ) - 1 ) | newValue );
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::ReadDeltaLongCounter
|
|
================
|
|
*/
|
|
int idBitMsg::ReadDeltaLongCounter( int oldValue ) const {
|
|
int i, newValue;
|
|
|
|
i = ReadBits( 5 );
|
|
if ( !i ) {
|
|
return oldValue;
|
|
}
|
|
newValue = ReadBits( i );
|
|
return ( oldValue & ~( ( 1 << i ) - 1 ) | newValue );
|
|
}
|
|
|
|
/*
|
|
==================
|
|
idBitMsg::ReadDeltaDict
|
|
==================
|
|
*/
|
|
bool idBitMsg::ReadDeltaDict( idDict &dict, const idDict *base ) const {
|
|
char key[MAX_STRING_CHARS];
|
|
char value[MAX_STRING_CHARS];
|
|
bool changed = false;
|
|
|
|
if ( base != NULL ) {
|
|
dict = *base;
|
|
} else {
|
|
dict.Clear();
|
|
}
|
|
|
|
while( ReadString( key, sizeof( key ) ) != 0 ) {
|
|
ReadString( value, sizeof( value ) );
|
|
dict.Set( key, value );
|
|
changed = true;
|
|
}
|
|
|
|
while( ReadString( key, sizeof( key ) ) != 0 ) {
|
|
dict.Delete( key );
|
|
changed = true;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
/*
|
|
================
|
|
idBitMsg::DirToBits
|
|
================
|
|
*/
|
|
int idBitMsg::DirToBits( const idVec3 &dir, int numBits ) {
|
|
int max, bits;
|
|
float bias;
|
|
|
|
assert( numBits >= 6 && numBits <= 32 );
|
|
assert( dir.LengthSqr() - 1.0f < 0.01f );
|
|
|
|
numBits /= 3;
|
|
max = ( 1 << ( numBits - 1 ) ) - 1;
|
|
bias = 0.5f / max;
|
|
|
|
bits = FLOATSIGNBITSET( dir.x ) << ( numBits * 3 - 1 );
|
|
bits |= ( idMath::Ftoi( ( idMath::Fabs( dir.x ) + bias ) * max ) ) << ( numBits * 2 );
|
|
bits |= FLOATSIGNBITSET( dir.y ) << ( numBits * 2 - 1 );
|
|
bits |= ( idMath::Ftoi( ( idMath::Fabs( dir.y ) + bias ) * max ) ) << ( numBits * 1 );
|
|
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::WriteDeltaLongCounter
|
|
================
|
|
*/
|
|
void idBitMsgDelta::WriteDeltaLongCounter( int oldValue, int newValue ) {
|
|
if ( newBase ) {
|
|
newBase->WriteBits( newValue, 32 );
|
|
}
|
|
|
|
if ( !base ) {
|
|
writeDelta->WriteDeltaLongCounter( oldValue, newValue );
|
|
changed = true;
|
|
} else {
|
|
int baseValue = base->ReadBits( 32 );
|
|
if ( baseValue == newValue ) {
|
|
writeDelta->WriteBits( 0, 1 );
|
|
} else {
|
|
writeDelta->WriteBits( 1, 1 );
|
|
writeDelta->WriteDeltaLongCounter( 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::ReadDeltaLongCounter
|
|
================
|
|
*/
|
|
int idBitMsgDelta::ReadDeltaLongCounter( int oldValue ) const {
|
|
int value;
|
|
|
|
if ( !base ) {
|
|
value = readDelta->ReadDeltaLongCounter( oldValue );
|
|
changed = true;
|
|
} else {
|
|
int baseValue = base->ReadBits( 32 );
|
|
if ( !readDelta || readDelta->ReadBits( 1 ) == 0 ) {
|
|
value = baseValue;
|
|
} else {
|
|
value = readDelta->ReadDeltaLongCounter( oldValue );
|
|
changed = true;
|
|
}
|
|
}
|
|
|
|
if ( newBase ) {
|
|
newBase->WriteBits( value, 32 );
|
|
}
|
|
return value;
|
|
}
|