genesis-3d_engine/Engine/foundation/io/zipfs/zipfileentry.cc

/****************************************************************************
Copyright (c) 2006, Radon Labs GmbH
Copyright (c) 2011-2013,WebJet Business Division,CYOU
 
http://www.genesis-3d.com.cn

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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****************************************************************************/


#include "stdneb.h"
#include "io/zipfs/zipfileentry.h"

namespace IO
{
using namespace Util;
using namespace Threading;

//------------------------------------------------------------------------------
/**
*/
ZipFileEntry::ZipFileEntry() :
    archiveCritSect(0),
    zipFileHandle(0),
    uncompressedSize(0),
	mCurrentPos(0),
	m_localBuffer(0)
{
    Memory::Clear(&this->filePosInfo, sizeof(this->filePosInfo));
}

//------------------------------------------------------------------------------
/**
*/
ZipFileEntry::~ZipFileEntry()
{
    this->zipFileHandle = 0;
	mCurrentPos = 0;
}

//------------------------------------------------------------------------------
/**
*/
void
ZipFileEntry::Setup(const StringAtom& n, unzFile h, CriticalSection* critSect)
{
    n_assert(0 != h);
    n_assert(0 == this->zipFileHandle);
    n_assert(0 != critSect);

    this->name = n;
    this->zipFileHandle = h;

    // store pointer to archive's critical section
    this->archiveCritSect = critSect;

    // store file position
    int res = unzGetFilePos(this->zipFileHandle, &this->filePosInfo);
    n_assert(UNZ_OK == res);

    // get other data about the file
    unz_file_info fileInfo;
    res = unzGetCurrentFileInfo(this->zipFileHandle, &fileInfo, 0, 0, 0, 0, 0, 0);
    n_assert(UNZ_OK == res);
    this->uncompressedSize = fileInfo.uncompressed_size;
}

//------------------------------------------------------------------------------
/**
*/
bool
ZipFileEntry::Open(const String& password)
{
	if(m_localBuffer!=NULL)
	{
		return true;
	}
    // critical section active until close is called or this function fails
    this->archiveCritSect->Enter();

    // set current file to this file
    int res = unzGoToFilePos(this->zipFileHandle, const_cast<unz_file_pos*>(&this->filePosInfo));
    if (UNZ_OK != res) 
    {
 //       this->archiveCritSect->Leave();
        return false;
    }

    // open the current file with optional password
    if (password.IsValid())
    {
        res = unzOpenCurrentFilePassword(this->zipFileHandle, password.AsCharPtr());
    }
    else
    {
        res = unzOpenCurrentFile(this->zipFileHandle);
    }
	
	m_localBuffer = (char *) Memory::Alloc(Memory::StreamDataHeap, uncompressedSize);
	unzReadCurrentFile(this->zipFileHandle, m_localBuffer, uncompressedSize);
	unzCloseCurrentFile(this->zipFileHandle);
	 this->archiveCritSect->Leave();
    if (UNZ_OK != res) 
    {
      
        return false;
    }

    return true;
}

//------------------------------------------------------------------------------
/**
*/
void
ZipFileEntry::Close()
{
	mCurrentPos = 0;
	if(m_localBuffer!=NULL)
	{
		Memory::Free(Memory::StreamDataHeap, m_localBuffer);
		m_localBuffer = NULL;

	}
    // close the file
   // int res = unzCloseCurrentFile(this->zipFileHandle);
   // n_assert(UNZ_OK == res);

    // release the critical section
 //   this->archiveCritSect->Leave();
}

//------------------------------------------------------------------------------
/**
*/
bool
ZipFileEntry::Read(void* buf, Stream::Size numBytes)
{
    n_assert(0 != this->zipFileHandle);
    n_assert(0 != buf);
    n_assert(0 != this->archiveCritSect);

    // read uncompressed data 
	n_assert(m_localBuffer!=0);
	Memory::Copy(m_localBuffer+mCurrentPos,buf,numBytes);

	mCurrentPos+=numBytes;
    return true;
}

bool ZipFileEntry::SetOffset( IO::Stream::Size offset )
{
// 	int pos = unzSetOffset(zipFileHandle,offset);
// 	return pos == offset;

	mCurrentPos = offset;
	return true;
}

} // namespace ZipFileEntry