Method LoadPacketsFromFile

src/par2repairer.cpp:332–573

Load the packets from the specified file

// Load the packets from the specified file
bool Par2Repairer::LoadPacketsFromFile(std::string filename)
{
  // Skip the file if it has already been processed
  if (diskFileMap.Find(filename) != 0)
  {
    return true;
  }

  DiskFile *diskfile = new DiskFile(sout, serr);

  // Open the file
  if (!diskfile->Open(filename))
  {
    // If we could not open the file, ignore the error and
    // proceed to the next file
    delete diskfile;
    return true;
  }

  if (noiselevel > nlSilent)
  {
    std::string path;
    std::string name;
    DiskFile::SplitFilename(filename, path, name);
    sout << "Loading \"" << name << "\"." << std::endl;
  }

  // How many useable packets have we found
  u32 packets = 0;

  // How many recovery packets were there
  u32 recoverypackets = 0;

  // How big is the file
  u64 filesize = diskfile->FileSize();
  if (filesize > 0)
  {
    // Allocate a buffer to read data into
    // The buffer should be large enough to hold a whole
    // critical packet (i.e. file verification, file description, main,
    // and creator), but not necessarily a whole recovery packet.
    size_t buffersize = (size_t)std::min((u64)1048576, filesize);
    u8 *buffer = new u8[buffersize];

    // Progress indicator
    u64 progress = 0;

    // Start at the beginning of the file
    u64 offset = 0;

    // Continue as long as there is at least enough for the packet header
    while (offset + sizeof(PACKET_HEADER) <= filesize)
    {
      if (noiselevel > nlQuiet)
      {
        // Update a progress indicator
        u32 oldfraction = (u32)(1000 * progress / filesize);
        u32 newfraction = (u32)(1000 * offset / filesize);