Unified Emulator Format - Structure

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:

    “There is no such thing as a language, not if a language is anything like what many philosophers and linguists have supposed. There is therefore no such thing to be learned, mastered, or born with. We must give up the idea of a clearly defined shared structure which language-users acquire and then apply to cases.”
    —Donald Davidson (b. 1917)

    “... the structure of our public morality crashed to earth. Above its grave a tombstone read, “Be tolerant—even of evil.” Logically the next step would be to say to our commonwealth’s criminals, “I disagree that it’s all right to rob and murder, but naturally I respect your opinion.” Tolerance is only complacence when it makes no distinction between right and wrong.”
    —Sarah Patton Boyle, U.S. civil rights activist and author. The Desegregated Heart, part 2, ch. 2 (1962)

    “In the extent and proper structure of the Union, therefore, we behold a republican remedy for the diseases most incident to republican government.”
    —James Madison (1751–1836)