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117 lines
2.6 KiB
C++
117 lines
2.6 KiB
C++
//====== Copyright 1996-2004, Valve Corporation, All rights reserved. =======
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//
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// Purpose:
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//
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//=============================================================================
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#include "tier1/utlbinaryblock.h"
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//-----------------------------------------------------------------------------
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// Base class, containing simple memory management
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//-----------------------------------------------------------------------------
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CUtlBinaryBlock::CUtlBinaryBlock( int growSize, int initSize ) : m_Memory( growSize, initSize )
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{
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m_nActualLength = 0;
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}
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CUtlBinaryBlock::CUtlBinaryBlock( void* pMemory, int nSizeInBytes, int nInitialLength ) : m_Memory( (unsigned char*)pMemory, nSizeInBytes )
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{
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m_nActualLength = nInitialLength;
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}
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CUtlBinaryBlock::CUtlBinaryBlock( const void* pMemory, int nSizeInBytes ) : m_Memory( (const unsigned char*)pMemory, nSizeInBytes )
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{
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m_nActualLength = nSizeInBytes;
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}
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CUtlBinaryBlock::CUtlBinaryBlock( const CUtlBinaryBlock& src )
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{
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Set( src.Get(), src.Length() );
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}
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void CUtlBinaryBlock::Get( void *pValue, int nLen ) const
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{
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Assert( nLen > 0 );
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if ( m_nActualLength < nLen )
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{
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nLen = m_nActualLength;
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}
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if ( nLen > 0 )
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{
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memcpy( pValue, m_Memory.Base(), nLen );
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}
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}
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void CUtlBinaryBlock::SetLength( int nLength )
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{
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Assert( !m_Memory.IsReadOnly() );
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m_nActualLength = nLength;
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if ( nLength > m_Memory.NumAllocated() )
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{
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int nOverFlow = nLength - m_Memory.NumAllocated();
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m_Memory.Grow( nOverFlow );
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// If the reallocation failed, clamp length
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if ( nLength > m_Memory.NumAllocated() )
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{
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m_nActualLength = m_Memory.NumAllocated();
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}
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}
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#ifdef _DEBUG
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if ( m_Memory.NumAllocated() > m_nActualLength )
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{
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memset( ( ( char * )m_Memory.Base() ) + m_nActualLength, 0xEB, m_Memory.NumAllocated() - m_nActualLength );
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}
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#endif
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}
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void CUtlBinaryBlock::Set( const void *pValue, int nLen )
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{
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Assert( !m_Memory.IsReadOnly() );
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if ( !pValue )
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{
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nLen = 0;
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}
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SetLength( nLen );
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if ( m_nActualLength )
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{
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if ( ( ( const char * )m_Memory.Base() ) >= ( ( const char * )pValue ) + nLen ||
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( ( const char * )m_Memory.Base() ) + m_nActualLength <= ( ( const char * )pValue ) )
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{
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memcpy( m_Memory.Base(), pValue, m_nActualLength );
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}
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else
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{
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memmove( m_Memory.Base(), pValue, m_nActualLength );
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}
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}
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}
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CUtlBinaryBlock &CUtlBinaryBlock::operator=( const CUtlBinaryBlock &src )
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{
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Assert( !m_Memory.IsReadOnly() );
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Set( src.Get(), src.Length() );
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return *this;
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}
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bool CUtlBinaryBlock::operator==( const CUtlBinaryBlock &src ) const
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{
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if ( src.Length() != Length() )
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return false;
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return !memcmp( src.Get(), Get(), Length() );
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}
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