DirTool.cpp

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/*
 * DirTool.cpp
 *
 *  This file is part of the HausmiSEP project
 *
 *  Copyright (C) 2012, 2013 Marco Alvarado (malvcr@gmail.com)
 *
 *  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 3 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, see <http://www.gnu.org/licenses/>.
 */

#include <HSEP/DirTool.h>

#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include <string.h>

namespace HSEP {

    ErrorCode DirTool::traverse(StringArray& pResultRef, string& pPathRef, string& pHeadRef) {

        ErrorCode vResult = EC::IncompleteProcessing;

        DIR*    vDirPtr;
        dirent* vDirEntPtr;
        string  vFilePath;
        size_t     vHeadSize = pHeadRef.size();
        const char* vHeadPtr = pHeadRef.c_str();

        if ((vDirPtr = opendir (pPathRef.c_str())) != nullptr) {
            while ((vDirEntPtr = readdir (vDirPtr)) != nullptr) {
                if (strncmp(vHeadPtr,vDirEntPtr->d_name,vHeadSize)==0) {
                    string vValue = string(vDirEntPtr->d_name);
                    pResultRef.push(vValue);
                }
            }
            closedir(vDirPtr);
            vResult = EC::OK;
        }
        else {
            switch (errno) {
                case EACCES:
                    vResult = EC::AccessError;
                    break;
                case EMFILE: 
                case ENFILE: 
                    vResult = EC::ManyOpenFiles;
                    break;
                case ENOMEM: 
                    vResult = EC::NotEnoughMemory;
                    break;
                default:
                    vResult = EC::NotCatalogedError;
                    break; // to avoid Eclipse editor warning (not really needed)
            } // switch (errno)
        } // else {

        return vResult;

    } // DirTool::traverse

    ErrorCode DirTool::traverse(StringArray& pResultRef, string& pPathRef, const char* pHeadPtr) {
        string vHead = string (pHeadPtr);
        return traverse(pResultRef,pPathRef,vHead);
    } // DirTool::traverse

} // HSEP namespace