How can I represent a hexadecimal string in a 128-bit format in MATLAB?

How can I represent a hexadecimal string as a 128-bit format in MATLAB?

 

Answer 1

[MathWorks Support Team]

You can change the string representation and then use ‘uint8’ so that the two hexadecimal characters fit into one byte.

Please find the sample code below with the necessary comments.

   % Get UUID and store as character
    uuid=char(java.util.UUID.randomUUID);
    val=uuid;

    % Remove the '-' to get the hexadecimal values
    val(val == '-') = '';

    % Turn 'val' into string elements each representing bytes
    % reshape(val,2,16) gives a 2x16 char array
    % permute(reshapedvalue,[2 1])' gives a 1x16 string array with each element
    % of the string representing a byte
    byte_hex = string(permute(reshape(val,2,16),[2 1]))';

    % Create an array of bytes
    bytes_vector = uint8(hex2dec(byte_hex));

    % dec2hex is to verify that the byte set is as expected
    dec2hex(bytes_vector);