fileName.H

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License
    This file is part of OpenFOAM.
 
    OpenFOAM 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 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::fileName
 
Description
    A class for handling file names.
 
    A fileName is a string of characters without whitespace or quotes.
    A fileName can be
      - constructed from a char*, a string or a word
      - concatenated by adding a '/' separator
      - decomposed into the path, name or component list
      - interrogated for type and access mode
 
    The string::expand() method expands environment variables, etc,
 
SourceFiles
    fileName.C
    fileNameIO.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef fileName_H
#define fileName_H
 
#include "word.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
template<class T> class List;
typedef List<word> wordList;
 
// Forward declaration of friend functions and operators
 
class fileName;
 
Istream& operator>>(Istream&, fileName&);
Ostream& operator<<(Ostream&, const fileName&);
 
 
//- Enumeration of file types
enum class fileType
{
    undefined,
    file,
    directory,
    link
};
 
 
/*---------------------------------------------------------------------------*\
                          Class fileName Declaration
\*---------------------------------------------------------------------------*/
 
class fileName
:
    public string
{
    // Private Member Functions
 
        //- Strip invalid characters
        inline void stripInvalid();
 
 
public:
 
    // Static Data Members
 
        static const char* const typeName;
        static int debug;
 
        //- An empty fileName
        static const fileName null;
 
 
    // Constructors
 
        //- Construct null
        inline fileName();
 
        //- Copy constructor
        inline fileName(const fileName&);
 
        //- Move constructor
        inline fileName(fileName&&);
 
        //- Copy constructor of word
        inline fileName(const word&);
 
        //- Copy constructor of string
        inline fileName(const string&);
 
        //- Copy constructor of std::string
        inline fileName(const std::string&);
 
        //- Copy constructor of character array
        inline fileName(const char*);
 
        //- Construct by concatenating elements of wordList separated by '/'
        explicit fileName(const wordList&);
 
        //- Construct from Istream
        fileName(Istream&);
 
 
    // Member Functions
 
        //- Is this character valid for a fileName?
        inline static bool valid(char);
 
        //- Cleanup file name
        //
        // * Removes repeated slashes
        //       /abc////def        -->   /abc/def
        //
        // * Removes '/./'
        //       /abc/def/./ghi/.   -->   /abc/def/./ghi
        //       abc/def/./         -->   abc/def
        //
        // * Removes '/../'
        //       /abc/def/../ghi/jkl/nmo/..   -->   /abc/ghi/jkl
        //       abc/../def/ghi/../jkl        -->   abc/../def/jkl
        //
        // * Removes trailing '/'
        //
        bool clean();
 
        //- Cleanup file name
        //  eg, remove repeated slashes, etc.
        fileName clean() const;
 
 
        // Interrogation
 
            //- Return the file type: file, directory, undefined or
            //  link (only if followLink=false)
            fileType type
            (
                const bool checkVariants = true,
                const bool followLink = true
            ) const;
 
            //- Return true if file name is a name without a path
            // i.e. does not contain a '/'
            bool isName() const;
 
            //- Return true if file name has a path
            // i.e. contains a '/'
            bool hasPath() const;
 
            //- Return true if file name is absolute
            bool isAbsolute() const;
 
            //- Convert from relative to absolute
            fileName& toAbsolute();
 
 
        // Decomposition
 
            //- Return file name (part beyond last /)
            //
            //  Behaviour compared to /usr/bin/basename:
            //    Input           name()          basename
            //    -----           ------          --------
            //    "foo"           "foo"           "foo"
            //    "/foo"          "foo"           "foo"
            //    "foo/bar"       "bar"           "bar"
            //    "/foo/bar"      "bar"           "bar"
            //    "/foo/bar/"     ""              "bar"
            //
            word name() const;
 
            //- Return file name (part beyond last /), substitute for FOAM_CASE
            string caseName() const;
 
            //- Return file name, optionally without extension
            word name(const bool noExt) const;
 
            //- Return directory path name (part before last /)
            //
            //  Behaviour compared to /usr/bin/dirname:
            //    input           path()          dirname
            //    -----           ------          -------
            //    "foo"           "."             "."
            //    "/foo"          "/"             "foo"
            //    "foo/bar"       "foo"           "foo"
            //    "/foo/bar"      "/foo"          "/foo"
            //    "/foo/bar/"     "/foo/bar/"     "/foo"
            //
            fileName path() const;
 
            //- Return file name without extension (part before last .)
            fileName lessExt() const;
 
            //- Return file name extension (part after last .)
            word ext() const;
 
            //- Return path components as wordList
            //
            //  Behaviour:
            //    Input           components()
            //    -----           ------
            //    "foo"           1("foo")
            //    "/foo"          1("foo")
            //    "foo/bar"       2("foo", "bar")
            //    "/foo/bar"      2("foo", "bar")
            //    "/foo/bar/"     2("foo", "bar")
            wordList components(const char delimiter='/') const;
 
            //- Return a single component of the path
            word component(const size_type, const char delimiter='/') const;
 
 
    // Member Operators
 
        // Assignment
 
            void operator=(const fileName&);
            void operator=(fileName&&);
            void operator=(const word&);
            void operator=(const string&);
            void operator=(const std::string&);
            void operator=(const char*);
 
 
    // IOstream Operators
 
        friend Istream& operator>>(Istream&, fileName&);
        friend Ostream& operator<<(Ostream&, const fileName&);
};
 
 
//- Assemble words and fileNames as filePaths by adding a '/' separator
fileName operator/(const string&, const string&);
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "fileNameI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //