////////////////////////////////////////////////////////////////////////////////

// $Workfile: ZipPlatform.cpp $

// $Archive: /ZipArchive_Linux/ZipPlatform.cpp $

// $Date$ $Author$

////////////////////////////////////////////////////////////////////////////////

// This source file is part of the ZipArchive library source distribution and

// is Copyright 2000-2003 by Tadeusz Dracz (http://www.artpol-software.com/)

//

// This program is free software; you can redistribute it and/or

// modify it under the terms of the GNU General Public License

// as published by the Free Software Foundation; either version 2

// of the License, or (at your option) any later version.

// 

// For the licensing details see the file License.txt

////////////////////////////////////////////////////////////////////////////////





#include "stdafx.h"

#include "zipplatform.h"

#include "zipfileheader.h"

#include "zipexception.h"

#include "zipautobuffer.h"





#include <utime.h>







#include "zippathcomponent.h"





#include "zipcompatibility.h"

#include <sys/vfs.h>

#include <unistd.h>

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>



const TCHAR CZipPathComponent::m_cSeparator = _T('/');



#ifndef _UTIMBUF_DEFINED

#define _utimbuf utimbuf

#endif



//////////////////////////////////////////////////////////////////////

// Construction/Destruction

//////////////////////////////////////////////////////////////////////

DWORD ZipPlatform::GetDeviceFreeSpace(LPCTSTR lpszPath)

{

	struct statfs sStats;

	if (statfs(lpszPath, &sStats) == -1)

		return 0;



        return sStats.f_bsize * sStats.f_bavail;

}



bool ZipPlatform::GetFileSize(LPCTSTR lpszFileName, DWORD& dSize)

{

	int f = open(lpszFileName, O_RDONLY);

	if (f == -1)

		return false;

	int iSize = lseek(f, 0, SEEK_END);

	close(f);

	if (iSize == -1)

		return false;

	dSize = (DWORD)iSize;

	return true;

}



CZipString ZipPlatform::GetTmpFileName(LPCTSTR lpszPath, DWORD iSizeNeeded)

{

	TCHAR empty[] = _T(""), prefix [] = _T("zar");

	TCHAR* buf = NULL;

	CZipString tempPath;

	if (lpszPath)

	{

		// first try the user provided directory

		tempPath = lpszPath;

		if (ZipPlatform::GetDeviceFreeSpace(tempPath) < iSizeNeeded)

			tempPath.Empty();

		else

		{

			CZipPathComponent::AppendSeparator(tempPath);

			tempPath += prefix;

			tempPath += _T("XXXXXX");

			TCHAR* c = mktemp(tempPath.GetBuffer(tempPath.GetLength()));

			tempPath.ReleaseBuffer();

			if (c)

				return tempPath;

			else

				tempPath.Empty();

		}

	}





	TCHAR* v = tempnam(tempPath, prefix);

	tempPath = v;

        free(v);



	if (!tempPath.IsEmpty())

	{

		CZipPathComponent zpc(tempPath);

		if (ZipPlatform::GetDeviceFreeSpace(zpc.GetFilePath()) < iSizeNeeded)

			return empty;

		return tempPath;

	}

	else 

		return empty;

}



bool ZipPlatform::GetCurrentDirectory(CZipString& sz)

{

	char* pBuf = getcwd(NULL, 0);

	if (!pBuf)

		return false;

	sz = pBuf;

	free(pBuf);

	return true;

}



bool ZipPlatform::SetFileAttr(LPCTSTR lpFileName, DWORD uAttr)

{

	return chmod(lpFileName, uAttr >> 16) == 0;



}



bool ZipPlatform::GetFileAttr(LPCTSTR lpFileName, DWORD& uAttr)

{

	struct stat sStats;

	if (stat(lpFileName, &sStats) == -1)

		return false;

  	uAttr = (sStats.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO | S_IFMT)) << 16;

  	return true;





}



bool ZipPlatform::GetFileModTime(LPCTSTR lpFileName, time_t & ttime)

{



    	struct stat st;

	if (stat(lpFileName, &st) != 0)

		return false;



 	ttime = st.st_mtime;

	return ttime != -1;

}



bool ZipPlatform::SetFileModTime(LPCTSTR lpFileName, time_t ttime)

{

	struct utimbuf ub;

	ub.actime = time(NULL);

	ub.modtime = ttime == -1 ? time(NULL) : ttime; // if wrong file time, set it to the current

	return utime(lpFileName, &ub) == 0;

}





bool ZipPlatform::ChangeDirectory(LPCTSTR lpDirectory)

{

	return chdir(lpDirectory) == 0; 

}

int ZipPlatform::FileExists(LPCTSTR lpszName)

{

    	struct stat st;

	if (stat(lpszName, &st) != 0)

		return 0;

	else

	{

		if (S_ISDIR(st.st_mode))

			return -1;

		else

			return 1;

	}







}



ZIPINLINE  bool ZipPlatform::IsDriveRemovable(LPCTSTR lpszFilePath)

{

	// not implemmented

	return true;

}



ZIPINLINE  bool ZipPlatform::SetVolLabel(LPCTSTR lpszPath, LPCTSTR lpszLabel)

{

	// not implemmented

        return true;

}



ZIPINLINE void ZipPlatform::AnsiOem(CZipAutoBuffer& buffer, bool bAnsiToOem)

{

	// not implemmented

}



ZIPINLINE  bool ZipPlatform::RemoveFile(LPCTSTR lpszFileName, bool bThrow)

{

	if (unlink(lpszFileName) != 0)

		if (bThrow)

			CZipException::Throw(CZipException::notRemoved, lpszFileName);

		else 

			return false;

	return true;





}

ZIPINLINE  bool ZipPlatform::RenameFile( LPCTSTR lpszOldName, LPCTSTR lpszNewName , bool bThrow)

{



	if (rename(lpszOldName, lpszNewName) != 0)

		if (bThrow)

			CZipException::Throw(CZipException::notRenamed, lpszOldName);

		else 

			return false;

		return true;



}

ZIPINLINE  bool ZipPlatform::IsDirectory(DWORD uAttr)

{

	return S_ISDIR(uAttr >> 16) != 0;

}

ZIPINLINE  bool ZipPlatform::CreateDirectory(LPCTSTR lpDirectory)

{

	return mkdir(lpDirectory, S_IRUSR | S_IWUSR | S_IRGRP |S_IROTH) == 0;



}



ZIPINLINE  DWORD ZipPlatform::GetDefaultAttributes()

{

	return 0x81a40000;

}



ZIPINLINE  DWORD ZipPlatform::GetDefaultDirAttributes()

{

	return 0x41ff0010;

}





ZIPINLINE  int ZipPlatform::GetSystemID()

{

	return ZipCompatibility::zcUnix;

}



ZIPINLINE bool ZipPlatform::GetSystemCaseSensitivity()

{

	return true;

}





bool ZipPlatform::TruncateFile(int iDes, DWORD iSize)

{

	return ftruncate(iDes, iSize) == 0;



}



int ZipPlatform::OpenFile(LPCTSTR lpszFileName, UINT iMode, int iShareMode)

{

	return  open(lpszFileName, iMode, S_IRUSR | S_IWUSR | S_IRGRP |S_IROTH );

}



bool ZipPlatform::FlushFile(int iDes)

{

	return fsync(iDes) == 0;

}



int ZipPlatform::GetFileSystemHandle(int iDes)

{

        return iDes;

}