Merge branch 'master' of git://github.com/peterix/MultiMC5

1 files changed, 64 insertions, 0 deletions

diff --git a/java/membuffer.h b/java/membuffer.h
new file mode 100644
index 00000000..48304b9f
--- /dev/null
+++ b/java/membuffer.h
@@ -0,0 +1,64 @@
+#pragma once
+#include <stdint.h>
+#include <string>
+#include <vector>
+#include <exception>
+#include "endian.h"
+
+namespace util
+{
+	class membuffer
+	{
+	public:
+		membuffer(char * buffer, std::size_t size)
+		{
+			current = start = buffer;
+			end = start + size;
+		}
+		~membuffer()
+		{
+			// maybe? possibly? left out to avoid confusion. for now.
+			//delete start;
+		}
+		/**
+			* Read some value. That's all ;)
+			*/
+		template <class T>
+		void read(T& val)
+		{
+			val = *(T *)current;
+			current += sizeof(T);
+		}
+		/**
+			* Read a big-endian number
+			* valid for 2-byte, 4-byte and 8-byte variables
+			*/
+		template <class T>
+		void read_be(T& val)
+		{
+			val = util::bigswap(*(T *)current);
+			current += sizeof(T);
+		}
+		/**
+			* Read a string in the format:
+			* 2B length (big endian, unsigned)
+			* length bytes data
+			*/
+		void read_jstr(std::string & str)
+		{
+			uint16_t length = 0;
+			read_be(length);
+			str.append(current,length);
+			current += length;
+		}
+		/**
+			* Skip N bytes
+			*/
+		void skip (std::size_t N)
+		{
+			current += N;
+		}
+	private:
+		char * start, *end, *current;
+	};
+}