tar.h

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/*
 * Copyright (c) 2013-2015:  G-CSC, Goethe University Frankfurt
 * Author: Martin Rupp
 * 
 * This file is part of UG4.
 * 
 * UG4 is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License version 3 (as published by the
 * Free Software Foundation) with the following additional attribution
 * requirements (according to LGPL/GPL v3 §7):
 * 
 * (1) The following notice must be displayed in the Appropriate Legal Notices
 * of covered and combined works: "Based on UG4 (www.ug4.org/license)".
 * 
 * (2) The following notice must be displayed at a prominent place in the
 * terminal output of covered works: "Based on UG4 (www.ug4.org/license)".
 * 
 * (3) The following bibliography is recommended for citation and must be
 * preserved in all covered files:
 * "Reiter, S., Vogel, A., Heppner, I., Rupp, M., and Wittum, G. A massively
 *   parallel geometric multigrid solver on hierarchically distributed grids.
 *   Computing and visualization in science 16, 4 (2013), 151-164"
 * "Vogel, A., Reiter, S., Rupp, M., Nägel, A., and Wittum, G. UG4 -- a novel
 *   flexible software system for simulating pde based models on high performance
 *   computers. Computing and visualization in science 16, 4 (2013), 165-179"
 * 
 * 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 Lesser General Public License for more details.
 */
 
#ifndef __H__TAR_H_
#define __H__TAR_H_
 
#include <stdio.h>
namespace ug{
struct TarHeader
{
  char filename[100];
  char filemode[8];
  char userID[8];
  char groupID[8];
  char octalFileSize[12];
  char octalModificationTimeStamp[12];
  char checksum[8];
  char linkIndicator;
  char linkedFilename[100];
 
  char ustarIndicator[6];
  char ustarVersion[2];
  char ustarOwnerUserName[32];
  char ustarOwnerGroupName[32];
  char ustarDeviceMajorNumber[8];
  char ustarDeviceMinorNumber[8];
  char ustarFilenamePrefix[155];
  char padding[12];
 
 
  //char padding[512 - (100+8+8+8+12+12+8+1+100)];
 
  TarHeader()
  {
    memset(this, 0, sizeof(TarHeader));
    strcpy(filemode, "000644 ");
    strcpy(userID,  "000765 ");
    strcpy(groupID,   "000024 ");
    strcpy(ustarIndicator, "ustar");
    memcpy(ustarVersion, "00", 2);
    strcpy(ustarOwnerUserName, "");
    strcpy(ustarOwnerGroupName, "");
    strcpy(ustarDeviceMajorNumber, "000000 ");
    strcpy(ustarDeviceMinorNumber, "000000 ");
 
    sprintf(octalModificationTimeStamp, "%o", ((unsigned int)time(NULL)));
//    strncpy(octalModificationTimeStamp, "12253557334 ", 12);
    linkIndicator = '0';
  }
  void set_filename(std::string name)
  {
    strcpy(filename, name.c_str());
  }
  void set_filesize(size_t size)
  {
    char buf[13];
    sprintf(buf, "%011o ", (unsigned int)size);
    memcpy(octalFileSize, buf, 12);
  }
 
  void set_checksum()
  {
    memset(checksum, 32, sizeof(checksum));
    unsigned char *p = (unsigned char *) this;
    unsigned int cs = 0;
    for(size_t i=0; i<sizeof(TarHeader); i++)
      cs += p[i];
    sprintf(checksum, "%06o", ((unsigned int)cs));
    //       std:: cout << "checksum = " << checksum << "\n";
  }
};
 
}
#endif /* TAR_H_ */