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compressZlib: don't use a SharedBuffer but a raw u8 * pointer

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Remove usage of the SharedBuffer in zlib compression which has two problems:
* We copied the whole memory block to compress it (not good with mapblocks)
* We copied sometimes strings to SharedBuffer to SharedBuffer (2nd time)

Use this method in MapNode::serializeBulk + optimize serialization but merging 3 identical loops in a single loop
This commit is contained in:
Loic Blot
2017-07-26 23:37:44 +02:00
committed by Loïc Blot
parent 61e4877190
commit c27504a322
3 changed files with 34 additions and 40 deletions
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4
src/serialization.h
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@@ -86,12 +86,12 @@ inline bool ser_ver_supported(s32 v) {
Misc. serialization functions
*/
void compressZlib(SharedBuffer<u8> data, std::ostream &os, int level = -1);
void compressZlib(const u8 *data, size_t data_size, 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
void compress(SharedBuffer<u8> data, std::ostream &os, u8 version);
void compress(const SharedBuffer<u8> &data, std::ostream &os, u8 version);
//void compress(const std::string &data, std::ostream &os, u8 version);
void decompress(std::istream &is, std::ostream &os, u8 version);