Looks up the Unicode script for
iso15924. ISO 15924 assigns four-letter
codes to scripts. For example, the code for Arabic is ‘Arab’.
This function accepts four letter codes encoded as a
guint32 in a
big-endian fashion. That is, the code expected for Arabic is
0x41726162 (0x41 is ASCII code for ‘A’, 0x72 is ASCII code for ‘r’, etc).
See Codes for the representation of names of scripts for details.
a Unicode script