00001 //------------------------------------------------------------------------------ 00002 // Lamp : Open source game middleware 00003 // Copyright (C) 2004 Junpei Ohtani ( Email : junpee@users.sourceforge.jp ) 00004 // 00005 // This library is free software; you can redistribute it and/or 00006 // modify it under the terms of the GNU Lesser General Public 00007 // License as published by the Free Software Foundation; either 00008 // version 2.1 of the License, or (at your option) any later version. 00009 // 00010 // This library is distributed in the hope that it will be useful, 00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 // Lesser General Public License for more details. 00014 // 00015 // You should have received a copy of the GNU Lesser General Public 00016 // License along with this library; if not, write to the Free Software 00017 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00018 //------------------------------------------------------------------------------ 00019 00020 /** @file 00021 * メモリ入力ストリーム実装 00022 * @author Junpee 00023 */ 00024 00025 #include <stdio.h> 00026 #include "LampBasic.h" 00027 #include "Core/InputOutput/MemoryInputStream.h" 00028 00029 namespace Lamp{ 00030 00031 //------------------------------------------------------------------------------ 00032 // コンストラクタ 00033 MemoryInputStream::MemoryInputStream(const char* buffer, int size) : 00034 buffer_(buffer), size_(size), position_(0){ 00035 } 00036 //------------------------------------------------------------------------------ 00037 // デストラクタ 00038 MemoryInputStream::~MemoryInputStream(){ 00039 } 00040 //------------------------------------------------------------------------------ 00041 // メモリ入力ストリームの複製 00042 MemoryInputStream* MemoryInputStream::cloneMemoryInputStream(){ 00043 MemoryInputStream* memoryInputStream = 00044 new MemoryInputStream(buffer_, size_); 00045 memoryInputStream->setPosition(getPosition()); 00046 return memoryInputStream; 00047 } 00048 //------------------------------------------------------------------------------ 00049 // 終端かどうか 00050 bool MemoryInputStream::isEnd(){ 00051 return (position_ == size_); 00052 } 00053 //------------------------------------------------------------------------------ 00054 // バイトデータの読み出し 00055 void MemoryInputStream::readBytes(void* data, int size){ 00056 Assert((position_ + size) <= size_); 00057 std::memcpy(data, buffer_ + position_, size); 00058 position_ += size; 00059 } 00060 //------------------------------------------------------------------------------ 00061 // サイズの取得 00062 int MemoryInputStream::getSize(){ 00063 return size_; 00064 } 00065 //------------------------------------------------------------------------------ 00066 // スキップ 00067 void MemoryInputStream::skip(int size){ 00068 Assert((position_ + size) <= size_); 00069 position_ += size; 00070 } 00071 //------------------------------------------------------------------------------ 00072 // アライメントを取る 00073 int MemoryInputStream::align(int alignSize){ 00074 int size = position_ % alignSize; 00075 if(size == 0){ return size; } 00076 size = alignSize - size; 00077 Assert((position_ + size) <= size_); 00078 position_ += size; 00079 return size; 00080 } 00081 //------------------------------------------------------------------------------ 00082 // 読み込み位置の取得 00083 int MemoryInputStream::getPosition(){ 00084 return position_; 00085 } 00086 //------------------------------------------------------------------------------ 00087 // 読み込み位置の設定 00088 void MemoryInputStream::setPosition(int position){ 00089 Assert(position >= 0); 00090 Assert(position <= size_); 00091 position_ = position; 00092 } 00093 //------------------------------------------------------------------------------ 00094 } // End of namespace Lamp 00095 //------------------------------------------------------------------------------