--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/DataBuffer.h Sun Feb 02 17:06:39 2014 +0200
@@ -0,0 +1,94 @@
+/*
+ Copyright 2012-2014 Santeri Piippo
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ 3. The name of the author may not be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef BOTC_DATABUFFER_H
+#define BOTC_DATABUFFER_H
+
+#include <stdio.h>
+#include <string.h>
+#include "Main.h"
+#include "StringTable.h"
+
+#define MAX_MARKS 512
+
+// ============================================================================
+// data_buffer: A dynamic data buffer.
+//
+// Notes:
+//
+// - A mark is a "pointer" to a particular position in the bytecode. The actual
+// permanent position cannot be predicted in any way or form, thus these things
+// are used to "mark" a position like that for future use.
+//
+// - A reference is another "mark" that references a mark. When the bytecode
+// is written to file, they are changed into their marks' current
+// positions. Marks themselves are never written to files, only refs are
+//
+class DataBuffer
+{
+ PROPERTY (private, byte*, Buffer, NO_OPS, STOCK_WRITE)
+ PROPERTY (private, int, AllocatedSize, NUM_OPS, STOCK_WRITE)
+ PROPERTY (private, byte*, Position, NO_OPS, STOCK_WRITE)
+ PROPERTY (private, List<ByteMark*>, Marks, LIST_OPS, STOCK_WRITE)
+ PROPERTY (private, List<MarkReference*>, References, LIST_OPS, STOCK_WRITE)
+
+ public:
+ DataBuffer (int size = 128);
+ ~DataBuffer();
+
+ // ====================================================================
+ // Merge another data buffer into this one.
+ // Note: @other is destroyed in the process!
+ void MergeAndDestroy (DataBuffer* other);
+
+ // Clones this databuffer to a new one and returns it.
+ DataBuffer* Clone();
+
+ ByteMark* AddMark (String name);
+ MarkReference* AddReference (ByteMark* mark, bool write_placeholder = true);
+ void CheckSpace (int bytes);
+ void DeleteMark (int marknum);
+ void AdjustMark (ByteMark* mark);
+ void OffsetMark (ByteMark* mark, int offset);
+ ByteMark* FindMarkByName (const String& target);
+ void Dump();
+ void WriteFloat (float a);
+ void WriteStringIndex (const String& a);
+ void WriteString (const String& a);
+ void WriteByte (int8_t data);
+ void WriteWord (int16_t data);
+ void WriteDWord (int32_t data);
+ void CopyBuffer (const DataBuffer* buf);
+
+ inline int GetWrittenSize() const
+ {
+ return GetPosition() - GetBuffer();
+ }
+};
+
+#endif // BOTC_DATABUFFER_H