libs.marshal.binary_demarshaller source code

1 module libs.marshal.binary_demarshaller;
2 
3 import std.conv, std.algorithm, std.bitmanip;
4 import std.stdio;
5 
6 package interface IBinaryDemarshalerStorageStrategy 
7 {
8 package:
9 	immutable(ubyte[]) GetBuffer();
10 	void SetBuffer(immutable(ubyte[]) data);
11 
12 	T ReadVal(T)();
13 }
14 
15 public class InvalidFormattingException : Exception
16 {
17 	this(string s) { super(s); }
18 }
19 
20 package class BinaryDemarshallerStorageStrategy : IBinaryDemarshalerStorageStrategy
21 {
22 package:
23 	this() {}
24 
25 	this(const(ubyte[]) data)
26 	{
27 		SetBuffer(data);
28 	}
29 	
30 	final const(ubyte[]) GetBuffer()
31 	{
32 		return m_buffer.idup;
33 	}
34 	
35 	final void SetBuffer(const(ubyte)[] data)
36 	{
37 		m_buffer = data.dup;
38 		m_cursor = 0;
39 	}
40 	
41 	T ReadVal(T)()
42 	{
43 		T retval = m_buffer.peek!T(m_cursor);
44 		m_cursor += T.sizeof;
45 //		writefln("ReadVal!(%s) = %s", T.stringof, to!string(retval));
46 		return retval;
47 	}
48 	
49 private:
50 
51 	ubyte[] m_buffer;
52 	int m_cursor = 0;
53 	
54 	unittest {
55 		BinaryDemarshallerStorageStrategy tm = new BinaryDemarshallerStorageStrategy;
56 		tm.SetBuffer([0, 0, 0, 10, 65, 51, 51, 51]);
57 
58 		auto i = tm.ReadVal!int();
59 		auto f = tm.ReadVal!float();
60 		
61 		assert( i == 10 );
62 		assert( f == 11.2f );
63 		
64 	}
65 }