#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_