grib/src/main/java/ucar/nc2/grib/GribNumbers.java
public static long int8(RandomAccessFile raf) throws IOException {
    int a = raf.read();
    int b = raf.read();
    int c = raf.read();
    int d = raf.read();
    int e = raf.read();
    int f = raf.read();
    int g = raf.read();
    int h = raf.read();

    return (1 - ((a & 128) >> 6))
            * ((long)(a & 127) << 56 | (long) b << 48 | (long) c << 40 | (long) d << 32 | e << 24
            | f << 16 | g << 8 | h);

  }
public static long int8(RandomAccessFile raf) throws IOException {
    int a = raf.read();
    int b = raf.read();
    int c = raf.read();
    int d = raf.read();
    int e = raf.read();
    int f = raf.read();
    int g = raf.read();
    int h = raf.read();

    return (1 - ((a & 128) >> 6))
            * ((long)(a & 127) << 56 | (long) b << 48 | (long) c << 40 | (long) d << 32 | e << 24
            | f << 16 | g << 8 | h);

  }
public static long int8 ( RandomAccessFile raf ) throws IOException { int a = raf . read ( ) ; int b = raf . read ( ) ; int c = raf . read ( ) ; int d = raf . read ( ) ; int e = raf . read ( ) ; int f = raf . read ( ) ; int g = raf . read ( ) ; int h = raf . read ( ) ; return ( 1 - ( ( a & 128 ) >> 6 ) ) * ( ( long ) ( a & 127 ) << 56 | ( long ) b << 48 | ( long ) c << 40 | ( long ) d << 32 | e << 24 | f << 16 | g << 8 | h ) ; }
Convert 8 bytes into a signed long.

@param raf RandomAccessFile
@return long value
@throws IOException on read error
Convert 8 bytes into a signed long .