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- /*
- 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
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- #pragma once
- #include "irrlichttypes.h"
- #include "exceptions.h"
- #include <iostream>
- #include <string_view>
- /*
- Map format serialization version
- --------------------------------
- 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
- 3: optional fetching of far blocks
- 4: block compression
- 5: sector objects NOTE: block compression was left accidentally out
- 6: failed attempt at switching block compression on again
- 7: block compression switched on again
- 8: server-initiated block transfers and all kinds of stuff
- 9: block objects
- 10: water pressure
- 11: zlib'd blocks, block flags
- 12: UnlimitedHeightmap now uses interpolated areas
- 13: Mapgen v2
- 14: NodeMetadata
- 15: StaticObjects
- 16: larger maximum size of node metadata, and compression
- 17: MapBlocks contain timestamp
- 18: new generator (not really necessary, but it's there)
- 19: new content type handling
- 20: many existing content types translated to extended ones
- 21: dynamic content type allocation
- 22: minerals removed, facedir & wallmounted changed
- 23: new node metadata format
- 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
- 29: Switched compression to zstd, a bit of reorganization
- */
- // This represents an uninitialized or invalid format
- #define SER_FMT_VER_INVALID 255
- // Highest supported serialization version
- #define SER_FMT_VER_HIGHEST_READ 29
- // Saved on disk version
- #define SER_FMT_VER_HIGHEST_WRITE 29
- // Lowest supported serialization version
- #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
- inline bool ser_ver_supported(s32 v) {
- return v >= SER_FMT_VER_LOWEST_READ && v <= SER_FMT_VER_HIGHEST_READ;
- }
- /*
- Compression functions
- */
- void compressZlib(const u8 *data, size_t data_size, std::ostream &os, int level = -1);
- inline void compressZlib(std::string_view data, std::ostream &os, int level = -1)
- {
- compressZlib(reinterpret_cast<const u8*>(data.data()), data.size(), os, level);
- }
- void decompressZlib(std::istream &is, std::ostream &os, size_t limit = 0);
- void compressZstd(const u8 *data, size_t data_size, std::ostream &os, int level = 0);
- inline void compressZstd(std::string_view data, std::ostream &os, int level = 0)
- {
- compressZstd(reinterpret_cast<const u8*>(data.data()), data.size(), os, level);
- }
- void decompressZstd(std::istream &is, std::ostream &os);
- // These choose between zstd, zlib and a self-made one according to version
- void compress(const u8 *data, u32 size, std::ostream &os, u8 version, int level = -1);
- inline void compress(std::string_view data, std::ostream &os, u8 version, int level = -1)
- {
- compress(reinterpret_cast<const u8*>(data.data()), data.size(), os, version, level);
- }
- void decompress(std::istream &is, std::ostream &os, u8 version);
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