ICUBinary

ICU data header reader method. Takes a ICU generated big-endian input stream, parse the ICU standard file header and authenticates them.

Header format:

• Header size (char)
• Magic number 1 (byte)
• Magic number 2 (byte)
• Rest of the header size (char)
• Reserved word (char)
• Big endian indicator (byte)
• Character set family indicator (byte)
• Size of a char (byte) for c++ and c use
• Reserved byte (byte)
• Data format identifier (4 bytes), each ICU data has its own identifier to distinguish them. [0] major [1] minor [2] milli [3] micro
• Data version (4 bytes), the change version of the ICU data [0] major [1] minor [2] milli [3] micro
• Unicode version (4 bytes) this ICU is based on.

Example of use:

 try {
    FileInputStream input = new FileInputStream(filename);
    If (Utility.readICUDataHeader(input, dataformat, dataversion,
                                  unicode) {
        System.out.println("Verified file header, this is a ICU data file");
    }
 } catch (IOException e) {
    System.out.println("This is not a ICU data file");
 }