/*
-Minetest-c55
-Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
--------------------------------
For map data (blocks, nodes, sectors).
-
+
NOTE: The goal is to increment this so that saved maps will be
loadable by any version. Other compatibility is not
maintained.
-
+
0: original networked test with 1-byte nodes
1: update with 2-byte nodes
2: lighting is transmitted in param
21: dynamic content type allocation
22: minerals removed, facedir & wallmounted changed
23: new node metadata format
- 24: 16-bit node ids and node timers
+ 24: 16-bit node ids and node timers (never released as stable)
+ 25: Improved node timer format
+ 26: Never written; read the same as 25
+ 27: Added light spreading flags to blocks
+ 28: Added "private" flag to NodeMetadata
*/
// This represents an uninitialized or invalid format
#define SER_FMT_VER_INVALID 255
// Highest supported serialization version
-#define SER_FMT_VER_HIGHEST 24
+#define SER_FMT_VER_HIGHEST_READ 28
+// Saved on disk version
+#define SER_FMT_VER_HIGHEST_WRITE 28
// Lowest supported serialization version
-#define SER_FMT_VER_LOWEST 0
+#define SER_FMT_VER_LOWEST_READ 0
+// Lowest serialization version for writing
+// Can't do < 24 anymore; we have 16-bit dynamically allocated node IDs
+// in memory; conversion just won't work in this direction.
+#define SER_FMT_VER_LOWEST_WRITE 24
-#define ser_ver_supported(v) (v >= SER_FMT_VER_LOWEST && v <= SER_FMT_VER_HIGHEST)
+inline bool ser_ver_supported(s32 v) {
+ return v >= SER_FMT_VER_LOWEST_READ && v <= SER_FMT_VER_HIGHEST_READ;
+}
/*
Misc. serialization functions
*/
-void compressZlib(SharedBuffer<u8> data, std::ostream &os);
-void compressZlib(const std::string &data, std::ostream &os);
+void compressZlib(SharedBuffer<u8> data, std::ostream &os, int level = -1);
+void compressZlib(const std::string &data, std::ostream &os, int level = -1);
void decompressZlib(std::istream &is, std::ostream &os);
// These choose between zlib and a self-made one according to version