
#ifndef dirobj_h
#define dirobj_h

/*
* NIST Utils Class Library
* clutils/dirobj.h
* April 1997
* David Sauder
* K. C. Morris

* Development of this software was funded by the United States Government,
* and is not subject to copyright.
*/

/*
 * DirObj - This object contains a list of files in a directory.
 *		Can be used for checking paths etc.
 *	based on InterViews FBDirectory 
 *		Copyright (c) 1987, 1988, 1989 Stanford University from 
 *		/depot/iv/src/libInterViews/filebrowser.c <= notice
 *	I commented it, changed variable and function names, added a
 *	few things, and made it so we can actually use it.
 *		David Sauder
 */

///////////////////////////////////////////////////////////////////////////////
//
// These header files are a pain between compilers etc ... and 
// I agree they are in a mess.  You will have to CHECK them yourself
// depending on what you are using -- it works the way it is with g++
// but you need -I/depot/gnu/lib/g++-include
//
///////////////////////////////////////////////////////////////////////////////

#include <stdlib.h>

#include <string.h>
#include <sys/param.h>

#include <string>


/*****************************************************************************/

class DirObj {       
public:
    DirObj(const char* dirName);
    virtual ~DirObj();

    bool LoadDirectory(const std::string & name);
    static const std::string Normalize(const std::string & s);

    const char* ValidDirectories(const char*);

    int Index(const char*);
    const char* File(int index);
	// check for file in the currently loaded directory
    bool FileExists(const char* file) { return Index(file) ? true : false;};
    bool FileExists(const std::string & file) { return Index(file.c_str()) ? true : false;};
    int Count();

    static bool IsADirectory(const char*);
private:
    const char* RealPath(const char*);

    bool Reset(const std::string & path);
    void ClearFileList();
    void CheckIndex(int index);
    void InsertFile(const char*, int index);
    void AppendFile(const char*);
    void RemoveFile(int index);
    virtual int Position(const char*);
private:
    char** fileList;
    int fileCount;
    int fileListSize;
};

// Return the number of files in the loaded directory.
inline int DirObj::Count () { return fileCount; }

// Insert a new file into the fileList.
inline void DirObj::AppendFile (const char* s) { InsertFile(s, fileCount); }

// Return the file at the given index (starting at 0) in the fileList
inline const char* DirObj::File (int index) { 
    return (0 <= index && index < fileCount) ? fileList[index] : 0;
}

#endif
