mirror of
https://github.com/DarkflameUniverse/DarkflameServer.git
synced 2024-11-10 02:08:20 +00:00
507 lines
8.1 KiB
C++
507 lines
8.1 KiB
C++
/// \file
|
|
///
|
|
/// This file is part of RakNet Copyright 2003 Kevin Jenkins.
|
|
///
|
|
/// Usage of RakNet is subject to the appropriate license agreement.
|
|
/// Creative Commons Licensees are subject to the
|
|
/// license found at
|
|
/// http://creativecommons.org/licenses/by-nc/2.5/
|
|
/// Single application licensees are subject to the license found at
|
|
/// http://www.jenkinssoftware.com/SingleApplicationLicense.html
|
|
/// Custom license users are subject to the terms therein.
|
|
/// GPL license users are subject to the GNU General Public
|
|
/// License as published by the Free
|
|
/// Software Foundation; either version 2 of the License, or (at your
|
|
/// option) any later version.
|
|
|
|
#include "StringCompressor.h"
|
|
#include "DS_HuffmanEncodingTree.h"
|
|
#include "BitStream.h"
|
|
#include "RakString.h"
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
#include <memory.h>
|
|
#if defined(_PS3)
|
|
#include "Console2Includes.h"
|
|
#endif
|
|
|
|
using namespace RakNet;
|
|
|
|
StringCompressor* StringCompressor::instance=0;
|
|
int StringCompressor::referenceCount=0;
|
|
|
|
void StringCompressor::AddReference(void)
|
|
{
|
|
if (++referenceCount==1)
|
|
{
|
|
instance = new StringCompressor;
|
|
}
|
|
}
|
|
void StringCompressor::RemoveReference(void)
|
|
{
|
|
assert(referenceCount > 0);
|
|
|
|
if (referenceCount > 0)
|
|
{
|
|
if (--referenceCount==0)
|
|
{
|
|
delete instance;
|
|
instance=0;
|
|
}
|
|
}
|
|
}
|
|
|
|
StringCompressor* StringCompressor::Instance(void)
|
|
{
|
|
return instance;
|
|
}
|
|
|
|
unsigned int englishCharacterFrequencies[ 256 ] =
|
|
{
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
722,
|
|
0,
|
|
0,
|
|
2,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
11084,
|
|
58,
|
|
63,
|
|
1,
|
|
0,
|
|
31,
|
|
0,
|
|
317,
|
|
64,
|
|
64,
|
|
44,
|
|
0,
|
|
695,
|
|
62,
|
|
980,
|
|
266,
|
|
69,
|
|
67,
|
|
56,
|
|
7,
|
|
73,
|
|
3,
|
|
14,
|
|
2,
|
|
69,
|
|
1,
|
|
167,
|
|
9,
|
|
1,
|
|
2,
|
|
25,
|
|
94,
|
|
0,
|
|
195,
|
|
139,
|
|
34,
|
|
96,
|
|
48,
|
|
103,
|
|
56,
|
|
125,
|
|
653,
|
|
21,
|
|
5,
|
|
23,
|
|
64,
|
|
85,
|
|
44,
|
|
34,
|
|
7,
|
|
92,
|
|
76,
|
|
147,
|
|
12,
|
|
14,
|
|
57,
|
|
15,
|
|
39,
|
|
15,
|
|
1,
|
|
1,
|
|
1,
|
|
2,
|
|
3,
|
|
0,
|
|
3611,
|
|
845,
|
|
1077,
|
|
1884,
|
|
5870,
|
|
841,
|
|
1057,
|
|
2501,
|
|
3212,
|
|
164,
|
|
531,
|
|
2019,
|
|
1330,
|
|
3056,
|
|
4037,
|
|
848,
|
|
47,
|
|
2586,
|
|
2919,
|
|
4771,
|
|
1707,
|
|
535,
|
|
1106,
|
|
152,
|
|
1243,
|
|
100,
|
|
0,
|
|
2,
|
|
0,
|
|
10,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0
|
|
};
|
|
|
|
StringCompressor::StringCompressor()
|
|
{
|
|
DataStructures::Map<int, HuffmanEncodingTree *>::IMPLEMENT_DEFAULT_COMPARISON();
|
|
|
|
// Make a default tree immediately, since this is used for RPC possibly from multiple threads at the same time
|
|
HuffmanEncodingTree *huffmanEncodingTree = new HuffmanEncodingTree;
|
|
huffmanEncodingTree->GenerateFromFrequencyTable( englishCharacterFrequencies );
|
|
|
|
huffmanEncodingTrees.Set(0, huffmanEncodingTree);
|
|
}
|
|
void StringCompressor::GenerateTreeFromStrings( unsigned char *input, unsigned inputLength, int languageID )
|
|
{
|
|
HuffmanEncodingTree *huffmanEncodingTree;
|
|
if (huffmanEncodingTrees.Has(languageID))
|
|
{
|
|
huffmanEncodingTree = huffmanEncodingTrees.Get(languageID);
|
|
delete huffmanEncodingTree;
|
|
}
|
|
|
|
unsigned index;
|
|
unsigned int frequencyTable[ 256 ];
|
|
|
|
if ( inputLength == 0 )
|
|
return ;
|
|
|
|
// Zero out the frequency table
|
|
memset( frequencyTable, 0, sizeof( frequencyTable ) );
|
|
|
|
// Generate the frequency table from the strings
|
|
for ( index = 0; index < inputLength; index++ )
|
|
frequencyTable[ input[ index ] ] ++;
|
|
|
|
// Build the tree
|
|
huffmanEncodingTree = new HuffmanEncodingTree;
|
|
huffmanEncodingTree->GenerateFromFrequencyTable( frequencyTable );
|
|
huffmanEncodingTrees.Set(languageID, huffmanEncodingTree);
|
|
}
|
|
|
|
StringCompressor::~StringCompressor()
|
|
{
|
|
for (unsigned i=0; i < huffmanEncodingTrees.Size(); i++)
|
|
delete huffmanEncodingTrees[i];
|
|
}
|
|
|
|
void StringCompressor::EncodeString( const char *input, int maxCharsToWrite, RakNet::BitStream *output, int languageID )
|
|
{
|
|
HuffmanEncodingTree *huffmanEncodingTree;
|
|
if (huffmanEncodingTrees.Has(languageID)==false)
|
|
return;
|
|
huffmanEncodingTree=huffmanEncodingTrees.Get(languageID);
|
|
|
|
if ( input == 0 )
|
|
{
|
|
output->WriteCompressed( (unsigned int) 0 );
|
|
return ;
|
|
}
|
|
|
|
RakNet::BitStream encodedBitStream;
|
|
|
|
unsigned int stringBitLength;
|
|
|
|
int charsToWrite;
|
|
|
|
if ( maxCharsToWrite<=0 || ( int ) strlen( input ) < maxCharsToWrite )
|
|
charsToWrite = ( int ) strlen( input );
|
|
else
|
|
charsToWrite = maxCharsToWrite - 1;
|
|
|
|
huffmanEncodingTree->EncodeArray( ( unsigned char* ) input, charsToWrite, &encodedBitStream );
|
|
|
|
stringBitLength = (unsigned int) encodedBitStream.GetNumberOfBitsUsed();
|
|
|
|
output->WriteCompressed( stringBitLength );
|
|
|
|
output->WriteBits( encodedBitStream.GetData(), stringBitLength );
|
|
}
|
|
|
|
bool StringCompressor::DecodeString( char *output, int maxCharsToWrite, RakNet::BitStream *input, int languageID )
|
|
{
|
|
HuffmanEncodingTree *huffmanEncodingTree;
|
|
if (huffmanEncodingTrees.Has(languageID)==false)
|
|
return false;
|
|
if (maxCharsToWrite<=0)
|
|
return false;
|
|
huffmanEncodingTree=huffmanEncodingTrees.Get(languageID);
|
|
|
|
unsigned int stringBitLength;
|
|
int bytesInStream;
|
|
|
|
output[ 0 ] = 0;
|
|
|
|
if ( input->ReadCompressed( stringBitLength ) == false )
|
|
return false;
|
|
|
|
if ( (unsigned) input->GetNumberOfUnreadBits() < stringBitLength )
|
|
return false;
|
|
|
|
bytesInStream = huffmanEncodingTree->DecodeArray( input, stringBitLength, maxCharsToWrite, ( unsigned char* ) output );
|
|
|
|
if ( bytesInStream < maxCharsToWrite )
|
|
output[ bytesInStream ] = 0;
|
|
else
|
|
output[ maxCharsToWrite - 1 ] = 0;
|
|
|
|
return true;
|
|
}
|
|
#ifdef _CSTRING_COMPRESSOR
|
|
void StringCompressor::EncodeString( const CString &input, int maxCharsToWrite, RakNet::BitStream *output )
|
|
{
|
|
LPTSTR p = input;
|
|
EncodeString(p, maxCharsToWrite*sizeof(TCHAR), output, languageID);
|
|
}
|
|
bool StringCompressor::DecodeString( CString &output, int maxCharsToWrite, RakNet::BitStream *input, int languageID )
|
|
{
|
|
LPSTR p = output.GetBuffer(maxCharsToWrite*sizeof(TCHAR));
|
|
DecodeString(p,maxCharsToWrite*sizeof(TCHAR), input, languageID);
|
|
output.ReleaseBuffer(0)
|
|
|
|
}
|
|
#endif
|
|
#ifdef _STD_STRING_COMPRESSOR
|
|
void StringCompressor::EncodeString( const std::string &input, int maxCharsToWrite, RakNet::BitStream *output, int languageID )
|
|
{
|
|
EncodeString(input.c_str(), maxCharsToWrite, output, languageID);
|
|
}
|
|
bool StringCompressor::DecodeString( std::string *output, int maxCharsToWrite, RakNet::BitStream *input, int languageID )
|
|
{
|
|
if (maxCharsToWrite <= 0)
|
|
{
|
|
output->clear();
|
|
return true;
|
|
}
|
|
|
|
char *destinationBlock;
|
|
bool out;
|
|
|
|
#ifndef _XBOX360
|
|
if (maxCharsToWrite < MAX_ALLOCA_STACK_ALLOCATION)
|
|
{
|
|
destinationBlock = (char*) alloca(maxCharsToWrite);
|
|
out=DecodeString(destinationBlock, maxCharsToWrite, input, languageID);
|
|
*output=destinationBlock;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
destinationBlock = (char*) rakMalloc( maxCharsToWrite );
|
|
out=DecodeString(destinationBlock, maxCharsToWrite, input, languageID);
|
|
*output=destinationBlock;
|
|
rakFree(destinationBlock);
|
|
}
|
|
|
|
return out;
|
|
}
|
|
#endif
|
|
void StringCompressor::EncodeString( const RakString *input, int maxCharsToWrite, RakNet::BitStream *output, int languageID )
|
|
{
|
|
EncodeString(input->C_String(), maxCharsToWrite, output, languageID);
|
|
}
|
|
bool StringCompressor::DecodeString( RakString *output, int maxCharsToWrite, RakNet::BitStream *input, int languageID )
|
|
{
|
|
if (maxCharsToWrite <= 0)
|
|
{
|
|
output->Clear();
|
|
return true;
|
|
}
|
|
|
|
char *destinationBlock;
|
|
bool out;
|
|
|
|
#ifndef _XBOX360
|
|
if (maxCharsToWrite < MAX_ALLOCA_STACK_ALLOCATION)
|
|
{
|
|
destinationBlock = (char*) alloca(maxCharsToWrite);
|
|
out=DecodeString(destinationBlock, maxCharsToWrite, input, languageID);
|
|
*output=destinationBlock;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
destinationBlock = (char*) rakMalloc( maxCharsToWrite );
|
|
out=DecodeString(destinationBlock, maxCharsToWrite, input, languageID);
|
|
*output=destinationBlock;
|
|
rakFree(destinationBlock);
|
|
}
|
|
|
|
return out;
|
|
}
|