CodeTempla
66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
#ifndef ZLIB_EX__H_
|
|
#define ZLIB_EX__H_
|
|
|
|
#ifdef _WIN32
|
|
#pragma once
|
|
#endif
|
|
|
|
#include "zlib.h"
|
|
|
|
#ifdef _WIN32
|
|
#pragma comment(lib, "zlib.lib")
|
|
#endif
|
|
|
|
extern inline bool Gunzip(const char * pSrc, unsigned long nSrcSize, HDynamicArray<char> * pdaDst, unsigned long * pnDstSize)
|
|
{
|
|
if (nSrcSize == 0)
|
|
return false;
|
|
|
|
unsigned full_length = nSrcSize;
|
|
unsigned half_length = nSrcSize / 2;
|
|
|
|
unsigned uncompLength = full_length;
|
|
pdaDst->m_p = (char *)malloc(uncompLength + 8); // 8 : safety space for post process
|
|
|
|
z_stream strm;
|
|
strm.next_in = (Bytef *)pSrc;
|
|
strm.avail_in = nSrcSize;
|
|
strm.total_out = 0;
|
|
strm.zalloc = Z_NULL;
|
|
strm.zfree = Z_NULL;
|
|
|
|
bool done = false ;
|
|
|
|
if (inflateInit2(&strm, (16+MAX_WBITS)) != Z_OK)
|
|
return false;
|
|
|
|
while (!done)
|
|
{
|
|
if (strm.total_out >= uncompLength)
|
|
{
|
|
char * uncomp2 = (char *)malloc(uncompLength + half_length + 8); // 8 : safety space for post process
|
|
memcpy(uncomp2, pdaDst->m_p, uncompLength);
|
|
uncompLength += half_length;
|
|
pdaDst->Restruct(uncomp2);
|
|
}
|
|
|
|
strm.next_out = (Bytef *) (pdaDst->m_p + strm.total_out);
|
|
strm.avail_out = uncompLength - strm.total_out;
|
|
|
|
int err = inflate(&strm, Z_SYNC_FLUSH);
|
|
if (err == Z_STREAM_END)
|
|
done = true;
|
|
else if (err != Z_OK)
|
|
break;
|
|
}
|
|
|
|
if (inflateEnd(&strm) != Z_OK)
|
|
return false;
|
|
|
|
*pnDstSize = strm.total_out;
|
|
return true ;
|
|
}
|
|
|
|
|
|
#endif // ZLIB_EX__H_
|