//%LICENSE////////////////////////////////////////////////////////////////
//
// Licensed to The Open Group (TOG) under one or more contributor license
// agreements.  Refer to the OpenPegasusNOTICE.txt file distributed with
// this work for additional information regarding copyright ownership.
// Each contributor licenses this file to you under the OpenPegasus Open
// Source License; you may not use this file except in compliance with the
// License.
//
// 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.
//
//////////////////////////////////////////////////////////////////////////
//
//%/////////////////////////////////////////////////////////////////////////////

#include "Dir.h"
#include "InternalException.h"

#include <iostream>
#include <errno.h>

PEGASUS_NAMESPACE_BEGIN

// Clone the string to a plain old C-String and null out
// trailing slash (if any).

static CString _clonePath(const String& path)
{
    String clone = path;

    if (clone.size() && clone[clone.size()-1] == '/')
        clone.remove(clone.size()-1);

    return clone.getCString();
}

Dir::Dir(const String& path)
    : _path(path)
{
    _dirRep.dir = opendir(_clonePath(_path));

    if (_dirRep.dir)
    {
#if defined(PEGASUS_OS_ZOS) || defined(PEGASUS_OS_VMS)
        // ATTN: DO NOT REMOVE THE errno = 0 assignment.
        // Reason: On some platforms readdir_r is a wrapper around
        // readdir. Without errno set to 0, readdir reports a bad return
        // code even in the case that just the end of directory was reached.
        errno = 0;
#endif
        // Need to use readdir_r since we are multithreaded
        if (readdir_r(_dirRep.dir, &_dirRep.buffer, &_dirRep.entry) != 0)
        {
            _more = false;
            closedir(_dirRep.dir);
            throw CannotOpenDirectory(_path);
        }
        _more = _dirRep.entry != NULL;
    }
    else
    {
        _more = false;
        throw CannotOpenDirectory(_path);
    }
}

Dir::~Dir()
{
    if (_dirRep.dir)
        closedir(_dirRep.dir);

}


const char* Dir::getName() const
{
    return _more ? _dirRep.entry->d_name : "";
}

void Dir::next()
{
    if (_more)
    {
#if defined(PEGASUS_OS_ZOS) || defined(PEGASUS_OS_VMS)
        // ATTN: DO NOT REMOVE THE errno = 0 assignment.
        // Reason: On some platforms readdir_r is a wrapper around
        // readdir. Without errno set to 0, readdir reports a bad return
        // code even in the case that just the end of directory was reached.
        errno = 0;
#endif
        // Need to use readdir_r since we are multithreaded
        if (readdir_r(_dirRep.dir, &_dirRep.buffer, &_dirRep.entry) != 0)
        {
            _more = false;
            throw CannotOpenDirectory(_path);
        }
        _more = _dirRep.entry != NULL;
    }
}

PEGASUS_NAMESPACE_END