mirror of
https://github.com/nillerusr/source-engine.git
synced 2024-12-22 06:06:50 +00:00
160 lines
3.4 KiB
C++
160 lines
3.4 KiB
C++
|
|
//========= Copyright Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// The copyright to the contents herein is the property of Valve, L.L.C.
|
|
// The contents may be used and/or copied only with the written permission of
|
|
// Valve, L.L.C., or in accordance with the terms and conditions stipulated in
|
|
// the agreement/contract under which the contents have been supplied.
|
|
//
|
|
//*****************************************************************************
|
|
//
|
|
// Contents:
|
|
//
|
|
// CSimpleBitString
|
|
//
|
|
// Authors:
|
|
//
|
|
// Target restrictions:
|
|
//
|
|
// Tool restrictions:
|
|
//
|
|
// Things to do:
|
|
//
|
|
//
|
|
//
|
|
//*****************************************************************************
|
|
|
|
#ifndef INCLUDED_COMMON_SIMPLEBITSTRING_H
|
|
#define INCLUDED_COMMON_SIMPLEBITSTRING_H
|
|
|
|
#if defined(_MSC_VER) && (_MSC_VER > 1000)
|
|
#pragma once
|
|
#endif
|
|
|
|
|
|
//*****************************************************************************
|
|
//
|
|
// Include files required by this header.
|
|
//
|
|
// Note: Do NOT place any 'using' directives or declarations in header files -
|
|
// put them at the top of the source files that require them.
|
|
// Use fully-qualified names in header files.
|
|
//
|
|
//*****************************************************************************
|
|
|
|
// All precompiled headers (Stable.h) include this first to give use a common
|
|
// place for including order-dependent library headers (things that need to go first).
|
|
|
|
|
|
|
|
|
|
|
|
class CSimpleBitString
|
|
{
|
|
public:
|
|
explicit CSimpleBitString( uint32 ReserveNumBits = 0 )
|
|
:
|
|
m_uNumBits( 0 ),
|
|
m_vecU8()
|
|
{
|
|
m_vecU8.EnsureCapacity( (ReserveNumBits / 8) + 1 );
|
|
m_vecU8[ m_vecU8.AddToTail() ] = 0x00; // always need 1 byte
|
|
}
|
|
|
|
void clear()
|
|
{
|
|
m_uNumBits = 0;
|
|
m_vecU8.RemoveAll();
|
|
m_vecU8[ m_vecU8.AddToTail() ] = 0x00; // always need 1 byte
|
|
}
|
|
|
|
void AppendBits( uint64 data, uint32 NumSignificantLowBitsOfData );
|
|
void AppendBits( const uint8 * pData, uint32 NumBitsOfData );
|
|
|
|
void ReversiblyObfusticateBitsFromStart( uint32 NumBits, const uint8 * pObfusticationData, size_t uSizeOfObfusticationData );
|
|
uint8 GetByteChecksumFromStart( uint32 NumBits ) const;
|
|
|
|
uint GetCurrNumBits() const
|
|
{
|
|
return m_uNumBits;
|
|
}
|
|
|
|
const uint8 * data() const
|
|
{
|
|
return & m_vecU8[0];
|
|
}
|
|
|
|
size_t size() const
|
|
{
|
|
return m_vecU8.Count();
|
|
}
|
|
|
|
private:
|
|
uint32 m_uNumBits;
|
|
CUtlVector<uint8> m_vecU8;
|
|
|
|
public:
|
|
|
|
// Iterator class for retrieving bits
|
|
class iterator
|
|
{
|
|
public:
|
|
explicit iterator( const CSimpleBitString & bs )
|
|
:
|
|
m_rSimpleBitString( bs ),
|
|
m_uNextBitIdx( 0 )
|
|
{
|
|
}
|
|
|
|
void ResetToStart()
|
|
{
|
|
m_uNextBitIdx = 0;
|
|
}
|
|
|
|
uint32 GetNumConsumedBits() const
|
|
{
|
|
return m_uNextBitIdx;
|
|
}
|
|
|
|
uint32 GetNumRemainingBits() const
|
|
{
|
|
return m_rSimpleBitString.m_uNumBits - m_uNextBitIdx;
|
|
}
|
|
|
|
uint32 GetNextBits( uint32 NumBitsToGet );
|
|
uint64 GetNextBits64( uint32 NumBitsToGet );
|
|
|
|
void SkipNextBits( uint32 NumBitsToSkip )
|
|
{
|
|
if ( m_uNextBitIdx + NumBitsToSkip > m_rSimpleBitString.m_uNumBits )
|
|
{
|
|
AssertMsg( false, "Not enough bits in CSimpleBitString" );
|
|
NumBitsToSkip = 0;
|
|
}
|
|
|
|
m_uNextBitIdx += NumBitsToSkip;
|
|
}
|
|
|
|
bool operator ==( const iterator & other ) const
|
|
{
|
|
return (& m_rSimpleBitString == & other.m_rSimpleBitString)
|
|
&& m_uNextBitIdx == other.m_uNextBitIdx;
|
|
}
|
|
|
|
void DoAssertClassInvariant() const;
|
|
|
|
private:
|
|
const CSimpleBitString & m_rSimpleBitString; //lint !e1725 reference
|
|
uint32 m_uNextBitIdx;
|
|
};
|
|
|
|
friend class iterator;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
#endif
|