//%2004////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
// Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation, The Open Group.
// Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
// ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
// "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
// LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//==============================================================================
//
// Author: Mike Brasher (mbrasher@bmc.com)
//
// Modified By: Amit K Arora, IBM (amita@in.ibm.com)
//
//%/////////////////////////////////////////////////////////////////////////////

#ifndef Pegasus_Dir_h
#define Pegasus_Dir_h

#include <Pegasus/Common/Config.h>
#include <Pegasus/Common/String.h>
#include <Pegasus/Common/InternalException.h>
#include <Pegasus/Common/Linkage.h>
#include <Pegasus/Common/AutoPtr.h> 

PEGASUS_NAMESPACE_BEGIN

#if defined(PEGASUS_OS_TYPE_WINDOWS)
#include <io.h>
typedef struct 
{
    long file;
    struct _finddata_t findData;
} DirRep;
#elif defined(PEGASUS_OS_TYPE_UNIX)
#ifdef PEGASUS_OS_SOLARIS
#include <sys/param.h>
#endif
#include <dirent.h>

// ATTN: If a platform is found that does not have the readdir_r interface,
// this next line should be conditionally compiled out for that platform.
// Otherwise, the old readdir code can be removed.
#define PEGASUS_HAS_READDIR_R

typedef struct DirRep
{
    DIR* dir;
#ifdef PEGASUS_OS_OS400
    struct dirent_lg* entry;
#else
    struct dirent* entry;
#endif
#ifdef PEGASUS_HAS_READDIR_R
#ifdef PEGASUS_OS_OS400
    struct dirent_lg buffer;
#else
#ifdef PEGASUS_OS_SOLARIS
private:
        char buf[sizeof(dirent) + MAXNAMELEN];
public:
        struct dirent &buffer;
        inline DirRep()
                : buffer(*reinterpret_cast<struct dirent *>(buf))
        { }
#else
    struct dirent buffer;
#endif
#endif
#endif
};
#endif

/** The Dir class provides a platform independent way of iterating the
    files in a directory.
*/
class PEGASUS_COMMON_LINKAGE Dir
{
public:

    /** Starts this iterator class on the given path.
	@param String path is the path to the target directory 
	@return
	@exception throws CannotOpenDirectory if invalid directory.

	<pre>
	char* path = "."
	try
	{ 
	   for (Dir dir(path); dir.more(); dir.next())
	   {
	       cout << "name: " << dir.getName() << endl;
	   }
	}
	catch(CannotOpenDirectory&)
	{
	   // Error!
	}
	</pre>
    */
    Dir(const String& path);

    /** Release any iterator resources. */
    ~Dir();

    /** Return true if there are more file names to iterator. */
    Boolean more() const { return _more; }
 
    #if defined(PEGASUS_PLATFORM_DARWIN_PPC_GNU)
    /** Returns the file inode number. */
    const Uint32 getInode() const;
    #endif

    /** Returns the current file name. */
    const char* getName() const;

    /** Advance to next file in directory. */
    void next();

private:

    Boolean _more;
    Boolean _isValid;
    String _path;
    DirRep _dirRep;
};

PEGASUS_NAMESPACE_END

#endif /* Pegasus_Dir_h */