TraverseDirectory.cxx

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/*
 * Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG)
 *                         UNIVERSITAT POMPEU FABRA
 *
 *
 * This program 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 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include "TraverseDirectory.hxx"
#include <sys/types.h>
#include <cstring>

TraverseDirectory::TraverseDirectory(void)
{

}
// Helper method for TraverseHelper
bool TraverseDirectory::IsCurrentOrParentDir(DirectoryEntry dirEntry) const
{
#ifndef WIN32
        return !strcmp(dirEntry->d_name,".") || !strcmp(dirEntry->d_name,"..");
#else
        return false;
#endif
}

std::string TraverseDirectory::CompleteName(const std::string& currentDirName, DirectoryEntry dirEntry) const
{
#ifndef WIN32
        bool noDirName = currentDirName == "";
        return noDirName? dirEntry->d_name : currentDirName+"/"+dirEntry->d_name;
#else
        return "";
#endif

}

void TraverseDirectory::TraverseHelper( Directory dir, const std::string& currentDirname,
        int curdepth, int maxdepth )
{
#ifndef WIN32
        dirent* dirEntry;
        while ((dirEntry = readdir(dir)))
        {
                if (IsCurrentOrParentDir(dirEntry))
                        continue;

                std::string currentItemName = CompleteName(currentDirname, dirEntry);
                DIR* subdir = opendir(currentItemName.c_str());
                if (subdir)
                {
                        OnDirectory(currentItemName); // 'template method'
                        if (curdepth<maxdepth || maxdepth==-1)
                        {
                                TraverseHelper(subdir, currentItemName, curdepth+1, maxdepth);
                        }
                        closedir(subdir);
                }else
                {
                        OnFile(currentItemName); // 'template method'
                }
        }
#else
        WIN32_FIND_DATA fd;
        HANDLE hFind;
        std::string tmp;;
        if(currentDirname!="")
        {
                tmp+=currentDirname;
                tmp+="/";
        }
        tmp+="*.*";
        hFind = FindFirstFile(tmp.c_str(), &fd);
        if (hFind == INVALID_HANDLE_VALUE) return;
        
        do
        {
                std::string tmp2=currentDirname;
                tmp2+="/";
                tmp2+=fd.cFileName;
                                
                if ((fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) 
                {       
                        if (strcmp(fd.cFileName,".") && strcmp(fd.cFileName,".."))
                        {
                                
                                OnDirectory(tmp2);
                                if (curdepth<maxdepth || maxdepth==-1)
                                {
                                        TraverseHelper(fd, tmp2, curdepth+1, maxdepth);
                                }
                        }       
                }
                else
                {
                        OnFile(tmp2);
                }
        } while (FindNextFile(hFind, &fd)); // enumerates contents
        FindClose(hFind);
#endif
}

void TraverseDirectory::Traverse(const std::string& rootname,int maxdepth)
{
#ifndef WIN32
        DIR* dir;

        dir = opendir(rootname == "" ? "." : rootname.c_str());

        if (dir)
        {
                OnDirectory(rootname);
                TraverseHelper(dir,rootname,0,maxdepth);
                closedir(dir);
        }
#else
        WIN32_FIND_DATA fd;
        HANDLE hFind;
        std::string tmp = rootname;
        if ((tmp.rfind("/")!=tmp.length()-1)
                &&
                (tmp.rfind("\\")!=tmp.length()-1))
        {
                tmp += "\\";
        }
        tmp += "*.*";
        hFind = FindFirstFile(tmp.c_str(), &fd);
        if (hFind == INVALID_HANDLE_VALUE) return;
        if ((fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
        {       
                OnDirectory(rootname);
                TraverseHelper(fd,rootname,0,maxdepth);
        }
        FindClose(hFind);;

#endif
}


//Auxiliary function to return the extension of a given filename
std::string TraverseDirectory::GetExtension(const std::string& filename)
{
        return filename.substr(filename.rfind('.')+1);  
}