Structure
A UEF file consists of a fixed length header that identifies itself, followed by a linked list of chunks containing the data of interest. The header comprises the magic string UEF File!, a terminating null character, and the two-byte version number of the UEF specification in use. A reading application needs to pay attention to the version number, as the unit of measurement in some chunks differs according to the specification version, and one chunk has been redefined between versions.
Each chunk consists of a two-byte ID which determines its meaning, the length of the body in four bytes, and the body itself. An application can readily skip the bodies of chunks it does not need to process. After the last chunk the file simply ends. Currently, UEF chunks do not nest.
The whole UEF file, including the header, may optionally be compressed in gzip format. By examining the start of the file for a gzip or UEF header, a decompression library can be invoked as appropriate.
Read more about this topic: Unified Emulator Format
Famous quotes containing the word structure:
“The question is still asked of women: “How do you propose to answer the need for child care?” That is an obvious attempt to structure conflict in the old terms. The questions are rather: “If we as a human community want children, how does the total society propose to provide for them?””
—Jean Baker Miller (20th century)
“The structure was designed by an old sea captain who believed that the world would end in a flood. He built a home in the traditional shape of the Ark, inverted, with the roof forming the hull of the proposed vessel. The builder expected that the deluge would cause the house to topple and then reverse itself, floating away on its roof until it should land on some new Ararat.”
—For the State of New Jersey, U.S. public relief program (1935-1943)
“Man is more disposed to domination than freedom; and a structure of dominion not only gladdens the eye of the master who rears and protects it, but even its servants are uplifted by the thought that they are members of a whole, which rises high above the life and strength of single generations.”
—Karl Wilhelm Von Humboldt (1767–1835)