mirror of
https://github.com/DarkflameUniverse/DarkflameServer.git
synced 2024-11-27 07:57:21 +00:00
73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
|
#include "ZCompression.h"
|
|||
|
|
|
|||
|
|
#include <zlib.h>
|
|||
|
|
|
|||
|
|
namespace ZCompression
|
|||
|
|
{
|
|||
|
|
int32_t GetMaxCompressedLength(int32_t nLenSrc)
|
|||
|
|
{
|
|||
|
|
int32_t n16kBlocks = (nLenSrc + 16383) / 16384; // round up any fraction of a block
|
|||
|
|
return (nLenSrc + 6 + (n16kBlocks * 5));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
int32_t Compress(const uint8_t* abSrc, int32_t nLenSrc, uint8_t* abDst, int32_t nLenDst)
|
|||
|
|
{
|
|||
|
|
z_stream zInfo = { 0 };
|
|||
|
|
zInfo.total_in = zInfo.avail_in = nLenSrc;
|
|||
|
|
zInfo.total_out = zInfo.avail_out = nLenDst;
|
|||
|
|
zInfo.next_in = const_cast<Bytef*>(abSrc);
|
|||
|
|
zInfo.next_out = abDst;
|
|||
|
|
|
|||
|
|
int nErr, nRet = -1;
|
|||
|
|
nErr = deflateInit(&zInfo, Z_DEFAULT_COMPRESSION); // zlib function
|
|||
|
|
if (nErr == Z_OK) {
|
|||
|
|
nErr = deflate(&zInfo, Z_FINISH); // zlib function
|
|||
|
|
if (nErr == Z_STREAM_END) {
|
|||
|
|
nRet = zInfo.total_out;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
deflateEnd(&zInfo); // zlib function
|
|||
|
|
return(nRet);
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
int32_t Decompress(const uint8_t* abSrc, int32_t nLenSrc, uint8_t* abDst, int32_t nLenDst, int32_t& nErr)
|
|||
|
|
{
|
|||
|
|
// Get the size of the decompressed data
|
|||
|
|
z_stream zInfo = { 0 };
|
|||
|
|
zInfo.total_in = zInfo.avail_in = nLenSrc;
|
|||
|
|
zInfo.total_out = zInfo.avail_out = nLenDst;
|
|||
|
|
zInfo.next_in = const_cast<Bytef*>(abSrc);
|
|||
|
|
zInfo.next_out = abDst;
|
|||
|
|
|
|||
|
|
int nRet = -1;
|
|||
|
|
nErr = inflateInit(&zInfo); // zlib function
|
|||
|
|
if (nErr == Z_OK) {
|
|||
|
|
nErr = inflate(&zInfo, Z_FINISH); // zlib function
|
|||
|
|
if (nErr == Z_STREAM_END) {
|
|||
|
|
nRet = zInfo.total_out;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
inflateEnd(&zInfo); // zlib function
|
|||
|
|
return(nRet);
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
z_stream zInfo = { 0 };
|
|||
|
|
zInfo.total_in = zInfo.avail_in = nLenSrc;
|
|||
|
|
zInfo.total_out = zInfo.avail_out = nLenDst;
|
|||
|
|
zInfo.next_in = const_cast<Bytef*>(abSrc);
|
|||
|
|
zInfo.next_out = const_cast<Bytef*>(abDst);
|
|||
|
|
|
|||
|
|
int nRet = -1;
|
|||
|
|
nErr = inflateInit(&zInfo); // zlib function
|
|||
|
|
if (nErr == Z_OK) {
|
|||
|
|
nErr = inflate(&zInfo, Z_FINISH); // zlib function
|
|||
|
|
if (nErr == Z_STREAM_END) {
|
|||
|
|
nRet = zInfo.total_out;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
inflateEnd(&zInfo); // zlib function
|
|||
|
|
return(nRet); // -1 or len of output
|
|||
|
|
*/
|
|||
|
|
}
|
|||
|
|
}
|