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Support zlib-ng

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this provides a 60% speed improvement on an older map I have
This commit is contained in:
sfan5 2025-03-05 20:40:19 +01:00
parent 4ba09ec532
commit 8b1a143cda
3 changed files with 26 additions and 6 deletions
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11
CMakeLists.txt
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@ -57,7 +57,16 @@ endif(NOT LIBGD_LIBRARY OR NOT LIBGD_INCLUDE_DIR)
# Libraries: zlib # Libraries: zlib
find_package(ZLIB REQUIRED) find_package(zlib-ng QUIET)
if(zlib-ng_FOUND)
set(ZLIB_INCLUDE_DIR zlib-ng::zlib)
set(ZLIB_LIBRARY zlib-ng::zlib)
set(USE_ZLIB_NG TRUE)
message(STATUS "Found zlib-ng, using it instead of zlib.")
else()
find_package(ZLIB REQUIRED)
set(USE_ZLIB_NG FALSE)
endif()
# Libraries: zstd # Libraries: zstd

20
src/ZlibDecompressor.cpp
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@ -1,6 +1,16 @@
#include <zlib.h> #include <cstdint>
#include <stdint.h>
#include "ZlibDecompressor.h" #include "ZlibDecompressor.h"
#include "config.h"
// for convenient usage of both
#if USE_ZLIB_NG
#include <zlib-ng.h>
#define z_stream zng_stream
#define Z(x) zng_ ## x
#else
#include <zlib.h>
#define Z(x) x
#endif
ZlibDecompressor::ZlibDecompressor(const u8 *data, size_t size): ZlibDecompressor::ZlibDecompressor(const u8 *data, size_t size):
m_data(data), m_data(data),
@ -38,7 +48,7 @@ ustring ZlibDecompressor::decompress()
strm.next_in = Z_NULL; strm.next_in = Z_NULL;
strm.avail_in = 0; strm.avail_in = 0;
if (inflateInit(&strm) != Z_OK) if (Z(inflateInit)(&strm) != Z_OK)
throw DecompressError(); throw DecompressError();
strm.next_in = const_cast<unsigned char *>(data); strm.next_in = const_cast<unsigned char *>(data);
@ -49,7 +59,7 @@ ustring ZlibDecompressor::decompress()
int ret = 0; int ret = 0;
do { do {
ret = inflate(&strm, Z_NO_FLUSH); ret = Z(inflate)(&strm, Z_NO_FLUSH);
if (strm.avail_out == 0) { if (strm.avail_out == 0) {
const auto off = buffer.size(); const auto off = buffer.size();
buffer.reserve(off + BUFSIZE); buffer.reserve(off + BUFSIZE);
@ -62,7 +72,7 @@ ustring ZlibDecompressor::decompress()
m_seekPos += strm.next_in - data; m_seekPos += strm.next_in - data;
buffer.resize(buffer.size() - strm.avail_out); buffer.resize(buffer.size() - strm.avail_out);
(void) inflateEnd(&strm); (void) Z(inflateEnd)(&strm);
return buffer; return buffer;
} }

1
src/cmake_config.h.in
View File

@ -6,6 +6,7 @@
#cmakedefine01 USE_POSTGRESQL #cmakedefine01 USE_POSTGRESQL
#cmakedefine01 USE_LEVELDB #cmakedefine01 USE_LEVELDB
#cmakedefine01 USE_REDIS #cmakedefine01 USE_REDIS
#cmakedefine01 USE_ZLIB_NG
#define SHAREDIR "@SHAREDIR@" #define SHAREDIR "@SHAREDIR@"