diff -r 8d0d1b368de0 -r 09dcaeaa216b sources/network/bytestream.h
--- a/sources/network/bytestream.h	Sat Dec 13 04:32:15 2014 +0200
+++ b/sources/network/bytestream.h	Sat Dec 13 04:50:33 2014 +0200
@@ -29,6 +29,7 @@
 */
 
 #pragma once
+#include <stdexcept>
 #include "../main.h"
 
 class String;
@@ -39,7 +40,20 @@
 class Bytestream
 {
 public:
-	static bool sink;
+	class IOError : public std::exception
+	{
+		String m_message;
+
+	public:
+		IOError (String message) :
+			m_message (message) {}
+
+		inline METHOD
+		what() const throw() -> const char*
+		{
+			return m_message.chars();
+		}
+	};
 
 	Bytestream (unsigned long length = 0x800);
 	Bytestream (const unsigned char* data, unsigned long length);
@@ -54,12 +68,12 @@
 	inline METHOD data() const -> const unsigned char*;
 	       METHOD grow_to_fit (unsigned long bytes) -> void;
 	inline METHOD position() const -> unsigned long;
-	       METHOD read (unsigned char* buffer, unsigned long length, bool* ok = &sink) -> void;
-	       METHOD read_byte (bool* ok = &sink) -> char;
-	       METHOD read_short (bool* ok = &sink) -> short int;
-	       METHOD read_long (bool* ok = &sink) -> long int;
-	       METHOD read_string (bool* ok = &sink) -> String;
-	       METHOD read_float (bool* ok = &sink) -> float;
+	       METHOD read (unsigned char* buffer, unsigned long length) -> void;
+	       METHOD read_byte() -> char;
+	       METHOD read_short() -> short int;
+	       METHOD read_long() -> long int;
+	       METHOD read_string() -> String;
+	       METHOD read_float() -> float;
 	       METHOD resize (unsigned long length) -> void;
 	inline METHOD rewind() -> void;
 	inline METHOD seek (unsigned long pos) -> void;
@@ -87,6 +101,7 @@
 
 	METHOD init (const unsigned char* data, unsigned long length) -> void;
 	METHOD write (unsigned char val) -> void;
+	METHOD ensure_read_space (unsigned int bytes) -> void;
 	inline METHOD space_left() const -> unsigned long;
 };