JUCE/extras/Introjucer/Source/Utility/jucer_FileHelpers.h

/*
  ==============================================================================

   This file is part of the JUCE library - "Jules' Utility Class Extensions"
   Copyright 2004-11 by Raw Material Software Ltd.

  ------------------------------------------------------------------------------

   JUCE can be redistributed and/or modified under the terms of the GNU General
   Public License (Version 2), as published by the Free Software Foundation.
   A copy of the license is included in the JUCE distribution, or can be found
   online at www.gnu.org/licenses.

   JUCE 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.

  ------------------------------------------------------------------------------

   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.rawmaterialsoftware.com/juce for more information.

  ==============================================================================
*/

#ifndef __JUCER_FILEHELPERS_JUCEHEADER__
#define __JUCER_FILEHELPERS_JUCEHEADER__


//==============================================================================
namespace FileHelpers
{
    int64 calculateStreamHashCode (InputStream& stream);
    int64 calculateFileHashCode (const File& file);

    bool overwriteFileWithNewDataIfDifferent (const File& file, const void* data, int numBytes);
    bool overwriteFileWithNewDataIfDifferent (const File& file, const MemoryOutputStream& newData);
    bool overwriteFileWithNewDataIfDifferent (const File& file, const String& newData);

    bool containsAnyNonHiddenFiles (const File& folder);

    String unixStylePath (const String& path);
    String windowsStylePath (const String& path);

    bool shouldPathsBeRelative (String path1, String path2);
    bool isAbsolutePath (const String& path);

    // A windows-aware version of File::getRelativePath()
    String getRelativePathFrom (const File& file, const File& sourceFolder);
}

//==============================================================================
class FileModificationDetector
{
public:
    FileModificationDetector (const File& file_)
        : file (file_)
    {
    }

    const File& getFile() const                     { return file; }
    void fileHasBeenRenamed (const File& newFile)   { file = newFile; }

    bool hasBeenModified() const
    {
        return fileModificationTime != file.getLastModificationTime()
                 && (fileSize != file.getSize()
                      || FileHelpers::calculateFileHashCode (file) != fileHashCode);
    }

    void updateHash()
    {
        fileModificationTime = file.getLastModificationTime();
        fileSize = file.getSize();
        fileHashCode = FileHelpers::calculateFileHashCode (file);
    }

private:
    File file;
    Time fileModificationTime;
    int64 fileHashCode, fileSize;
};


#endif   // __JUCER_FILEHELPERS_JUCEHEADER__