byteBuffer.cpp

Engine/source/core/util/byteBuffer.cpp

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  1
  2//-----------------------------------------------------------------------------
  3// Copyright (c) 2012 GarageGames, LLC
  4//
  5// Permission is hereby granted, free of charge, to any person obtaining a copy
  6// of this software and associated documentation files (the "Software"), to
  7// deal in the Software without restriction, including without limitation the
  8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  9// sell copies of the Software, and to permit persons to whom the Software is
 10// furnished to do so, subject to the following conditions:
 11//
 12// The above copyright notice and this permission notice shall be included in
 13// all copies or substantial portions of the Software.
 14//
 15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 21// IN THE SOFTWARE.
 22//-----------------------------------------------------------------------------
 23
 24#include "core/util/byteBuffer.h"
 25
 26
 27namespace Torque
 28{
 29
 30class PrivateBBData
 31{
 32public:
 33   PrivateBBData()
 34      :  refCount( 1 ),
 35         dataSize( 0 ),
 36         data( NULL )
 37   {
 38   }
 39
 40   U32   refCount;   ///< Reference count
 41   U32   dataSize;   ///< Length of buffer
 42   U8    *data;      ///< Our data buffer
 43};
 44
 45//--------------------------------------
 46
 47ByteBuffer::ByteBuffer()
 48{
 49   _data = new PrivateBBData;
 50   _data->dataSize = 0;
 51   _data->data = NULL;
 52}
 53
 54ByteBuffer::ByteBuffer(U8 *dataPtr, U32 bufferSize)
 55{
 56   _data = new PrivateBBData;
 57   _data->dataSize = bufferSize;
 58   _data->data = new U8[bufferSize];
 59
 60   dMemcpy( _data->data, dataPtr, bufferSize );
 61}
 62
 63ByteBuffer::ByteBuffer(U32 bufferSize)
 64{
 65   _data = new PrivateBBData;
 66   _data->dataSize = bufferSize;
 67   _data->data = new U8[bufferSize];
 68}
 69
 70ByteBuffer::ByteBuffer(const ByteBuffer &theBuffer)
 71{
 72   _data = theBuffer._data;
 73   _data->refCount++;
 74}
 75
 76ByteBuffer  &ByteBuffer::operator=(const ByteBuffer &theBuffer)
 77{
 78   _data = theBuffer._data;
 79   _data->refCount++;
 80
 81   return *this;
 82}
 83
 84ByteBuffer::~ByteBuffer()
 85{
 86   if (!--_data->refCount)
 87   {
 88      delete [] _data->data;
 89      delete _data;
 90
 91      _data = NULL;
 92   }
 93}
 94
 95void ByteBuffer::setBuffer(U8 *dataPtr, U32 bufferSize, bool copyData)
 96{
 97   U8 *newData = dataPtr;
 98
 99   if ( copyData )
100   {
101      newData = new U8[bufferSize];
102
103      dMemcpy( newData, dataPtr, bufferSize );
104   }
105
106   delete [] _data->data;
107
108   _data->data = newData;
109   _data->dataSize = bufferSize;
110}
111
112void ByteBuffer::resize(U32 newBufferSize)
113{
114   U8    *newData = new U8[newBufferSize];
115
116   U32   copyLen = getMin( newBufferSize, _data->dataSize );
117   
118   dMemcpy( newData, _data->data, copyLen );
119
120   delete [] _data->data;
121
122   _data->data = newData;
123   _data->dataSize = newBufferSize;
124}
125
126void ByteBuffer::appendBuffer(const U8 *dataBuffer, U32 bufferSize)
127{
128   U32 start = _data->dataSize;
129   resize(start + bufferSize);
130   dMemcpy(_data->data + start, dataBuffer, bufferSize);
131}
132
133U32 ByteBuffer::getBufferSize() const
134{
135   return _data->dataSize;
136}
137
138U8 *ByteBuffer::getBuffer()
139{
140   return _data->data;
141}
142
143const U8 *ByteBuffer::getBuffer() const
144{
145   return _data->data;
146}
147
148ByteBuffer  ByteBuffer::getCopy() const
149{
150   return ByteBuffer( _data->data, _data->dataSize );
151}
152
153void ByteBuffer::clear()
154{
155   dMemset(_data->data, 0, _data->dataSize);
156}
157
158
159}
160