Engine directory for ticket #1

Engine/source/core/dataChunker.cpp

@@ -0,0 +1,97 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#include "platform/platform.h"
+#include "core/dataChunker.h"
+
+
+//----------------------------------------------------------------------------
+
+DataChunker::DataChunker(S32 size)
+{
+   mChunkSize          = size;
+   mCurBlock           = NULL;
+}
+
+DataChunker::~DataChunker()
+{
+   freeBlocks();
+}
+
+void *DataChunker::alloc(S32 size)
+{
+   if (size > mChunkSize)
+   {
+      DataBlock * temp = new DataBlock(size);
+      if (mCurBlock)
+      {
+         temp->next = mCurBlock->next;
+         mCurBlock->next = temp;
+      }
+      else
+      {
+         mCurBlock = temp;
+         temp->curIndex = mChunkSize;
+      }
+      return temp->data;
+   }
+
+   if(!mCurBlock || size + mCurBlock->curIndex > mChunkSize)
+   {
+      DataBlock *temp = new DataBlock(mChunkSize);
+      temp->next = mCurBlock;
+      temp->curIndex = 0;
+      mCurBlock = temp;
+   }
+
+   void *ret = mCurBlock->data + mCurBlock->curIndex;
+   mCurBlock->curIndex += (size + 3) & ~3; // dword align
+   return ret;
+}
+
+DataChunker::DataBlock::DataBlock(S32 size)
+{
+   data = new U8[size];
+}
+
+DataChunker::DataBlock::~DataBlock()
+{
+   delete[] data;
+}
+
+void DataChunker::freeBlocks(bool keepOne)
+{
+   while(mCurBlock && mCurBlock->next)
+   {
+      DataBlock *temp = mCurBlock->next;
+      delete mCurBlock;
+      mCurBlock = temp;
+   }
+   if (!keepOne)
+   {
+      delete mCurBlock;
+      mCurBlock = NULL;
+   }
+   else if (mCurBlock)
+      mCurBlock->curIndex = 0;
+}
+