refactor(Minecraft.World): Implement LCEMP changes.

Minecraft.World/ByteArrayOutputStream.cpp

@@ -49,18 +49,27 @@ void ByteArrayOutputStream::write(byteArray b)
 //b - the data.
 //off - the start offset in the data.
 //len - the number of bytes to write.
-void ByteArrayOutputStream::write(byteArray b, unsigned int offset, unsigned int length)
-{
-	assert( b.length >= offset + length );
-
-	// If we will fill the buffer we need to make it bigger
-	if( count + length >=  buf.length )
-		buf.resize( max( count + length + 1, buf.length * 2 ) );
-
-	XMemCpy( &buf[count], &b[offset], length );
-	//std::copy( b->data+offset, b->data+offset+length, buf->data + count ); // Or this instead?
-
-	count += length;
+void ByteArrayOutputStream::write(byteArray b, unsigned int offset, unsigned int length)
+{
+
+	if (offset > b.length || length > b.length - offset)
+		return;
+
+	if (length > 0xFFFFFFFF - count)
+		return;
+
+	// If we will fill the buffer we need to make it bigger
+	if( count + length >=  buf.length )
+	{
+		unsigned int newSize = (std::max)( count + length + 1, buf.length * 2 );
+		if( newSize <= buf.length )
+			return;
+		buf.resize( newSize );
+	}
+
+	XMemCpy( &buf[count], &b[offset], length );
+
+	count += length;
 }
 
 //Closing a ByteArrayOutputStream has no effect.