A script for calculating the CRC32 checksum of a given file.

crc32.m

% [INPUT]
% file_path = A char array representing the file path.
%
% [OUTPUT]
% crc32     = A char array representing the CRC32 Checksum of the file.

function crc32 = calculate_crc32(file_path)

    persistent array;

    if isempty(array) 
        array = javaArray('java.lang.String',0);
    end
      
    if (exist(file_path,'file') ~= 2)
        error('The specified file does not exist.');
    end

    import('java.lang.Long');
    import('java.nio.file.Files');
    import('java.nio.file.Paths');
    import('java.util.zip.CRC32');

    path = Paths.get(file_path,array);
    data = Files.readAllBytes(path);

    provider = java.util.zip.CRC32();
    provider.update(data);

    crc32 = char(Long.toHexString(provider.getValue()));

end