Method getInfo

ij/src/main/java/ij/plugin/FITS_Reader.java:1429–1518

()

	}

	FileInfo getInfo() throws IOException {
		FileInfo fi = new FileInfo();
		fi.fileFormat = FileInfo.FITS;
		fi.fileName = fileName;
		fi.directory = directory;
		fi.width = 0;
		fi.height = 0;
		fi.offset = 0;

		InputStream is = new FileInputStream(directory + fileName);
		if (fileName.toLowerCase().endsWith(".gz")) is = new GZIPInputStream(is);
		f = new DataInputStream(is);
		String line = getString(80);
		info.append(line+"\n");
		if (!line.startsWith("SIMPLE")) {f.close(); return null;}
		int count = 1;
		while ( true ) {
			count++;
			line = getString(80);
			info.append(line+"\n");

			// Cut the key/value pair
			int index = line.indexOf ( "=" );

			// Strip out comments
			int commentIndex = line.indexOf ( "/", index );
			if ( commentIndex < 0 )
				commentIndex = line.length ();

			// Split that values
			String key;
			String value;
			if ( index >= 0 ) {
				key = line.substring ( 0, index ).trim ();
				value = line.substring ( index + 1, commentIndex ).trim ();
			} else {
				key = line.trim ();
				value = "";
			}

			// Time to stop ?
			if (key.equals ("END") ) break;

			// Look for interesting information
			if (key.equals("BITPIX")) {
				int bitsPerPixel = Integer.parseInt ( value );
				if (bitsPerPixel==8)
					fi.fileType = FileInfo.GRAY8;
				else if (bitsPerPixel==16)
					fi.fileType = FileInfo.GRAY16_SIGNED;
				else if (bitsPerPixel==32)
					fi.fileType = FileInfo.GRAY32_INT;
				else if (bitsPerPixel==-32)
					fi.fileType = FileInfo.GRAY32_FLOAT;
				else if (bitsPerPixel==-64)
					fi.fileType = FileInfo.GRAY64_FLOAT;
				else {
					IJ.error("BITPIX must be 8, 16, 32, -32 (float) or -64 (double).");