C++ (Cpp) CheckMagic Examples

Example #1

File: DICOMParser.cpp Project: zenglb/mvtk

//
// read magic number from file
// return true if this is your image type, false if it is not
//
bool DICOMParser::IsDICOMFile(DICOMFile* file) {
  char magic_number[4];
  file->SkipToStart();
  file->Read(static_cast<void*>(magic_number),4);
  if (CheckMagic(magic_number))
    {
    return(true);
    }
  // try with optional skip
  else
    {
    file->Skip(OPTIONAL_SKIP-4);
    file->Read(static_cast<void*>(magic_number),4);
    if (CheckMagic(magic_number)) 
      {
      return true;
      }
    else
      {

#ifndef DICOMPARSER_IGNORE_MAGIC_NUMBER
      return false;
#else
      //
      // Try it anyways...
      //

      file->SkipToStart();

      doublebyte group = file->ReadDoubleByte();
      bool dicom;
      if (group == 0x0002 || group == 0x0008)
        {
        dicom_stream::cerr
          << "No DICOM magic number found, but file appears to be DICOM."
          << dicom_stream::endl;
        dicom_stream::cerr << "Proceeding without caution."
          << dicom_stream::endl;
        dicom = true;
        }
      else
        {
        dicom = false;
        }
      file->SkipToStart();

      return dicom;
#endif  // DICOMPARSER_IGNORE_MAGIC_NUMBER

      }
    }
}

Example #2

File: wad.c Project: samboy/Oblige

//
// ReadHeader
//
// Returns TRUE if successful, or FALSE if there was a problem (in
// which case the error message as been setup).
//
static int ReadHeader(const char *filename)
{
  size_t len;
  raw_wad_header_t header;

  len = fread(&header, sizeof(header), 1, in_file);

  if (len != 1)
  {
    SetErrorMsg("Trouble reading wad header for %s [%s]", 
      filename, strerror(errno));

    return FALSE;
  }

  if (! CheckMagic(header.type))
  {
    SetErrorMsg("%s does not appear to be a wad file (bad magic)", 
        filename);

    return FALSE;
  }

  wad.kind = (header.type[0] == 'I') ? IWAD : PWAD;
  
  wad.num_entries = UINT32(header.num_entries);
  wad.dir_start   = UINT32(header.dir_start);

  // initialise stuff
  wad.dir_head = NULL;
  wad.dir_tail = NULL;
  wad.current_level = NULL;
  wad.level_names = NULL;
  wad.num_level_names = 0;

  return TRUE;
}

Example #3

File: GlobalData.cpp Project: chr15m/LooperAdvance

// load all songs from ROM into memory
void GlobalData::LoadSongs()
{
	u16 checkmagic=0;
	offset = 0;
	
	REG_IME = 0; // disable interrupts
	
	debug("Loading songs.");

	// black = starting
	SetBG(0, 0, 0);
	
	ReadNumber(&checkmagic, sizeof(u16));
	
	// check first if there is any saved data in the databank
	if (checkmagic == magic)
	{
		// until we find the end of the songs
		while (!CheckMagic())
		{
			// red = song
			SetBG(10, 0, 0);
			
			// start a new song
			debug("Creating a new song struct.");
			NewSong();
			
			debug("Reading basic song data.");
			
			// read in the song name
			ReadString(&currentsong->name);
			debug("Song Name: %s", currentsong->name);

			// write bpm
			ReadNumber(&currentsong->bpm, sizeof(u16));
			debug("Song Speed: %d", currentsong->bpm);
			
			// until we find the end of the loops
			while (!CheckMagic())
			{
				// green = loop
				SetBG(0, 10, 0);
				
				// create a new loop
				debug("Creating a new loop struct.");
				NewLoop();
				
				debug("Reading basic loop data.");
				
				// write the loop name
				ReadString(&currentloop->name);
				// write the sample number
				ReadNumber(&currentloop->sample, sizeof(u16));
				// write the panning direction
				ReadNumber(&currentloop->pan, sizeof(bool));
				// write the pitch
				ReadNumber(&currentloop->pitch, sizeof(u16));
				// write the number of divisions
				ReadNumber(&currentloop->divisions, sizeof(u16));
				
				while (!CheckMagic())
				{
					// blue = note
					SetBG(0, 0, 10);
					
					// create a new note
					debug("Creating a new note struct.");
					NewNote();
					
					debug("Reading basic note data.");
					
					// write the note end action;
					ReadNumber(&currentnote->noteEnd, sizeof(u8));
					// write the beat offset
					ReadNumber(&currentnote->offset, sizeof(u8));
					// write the pitch
					ReadNumber(&currentnote->pitch, sizeof(u8));
					// write the swing
					ReadNumber(&currentnote->swing, sizeof(u8));
				}
			}
		}
	}

	// if we don't have a default song set yet
	if (!songdata)
	{
		debug("No load data; creating a new song.");
		NewSong();
	}

	REG_IME = 1; // enable interrupts
}