wetware-monitor-format

File Format

    |--  32 bits  --|

    +---------------+
    | file magic    |  0xa42d19a9
    |---------------|
    | record magic  |  see Record Magic
    |---------------|
    | total records |  actual number of stored records
    |---------------|
    | next record   |  index at which next record should be stored
    |---------------|
    | label         |  64-byte UTF-8 string
    :               :
    |               |
    |---------------|
    | record 0      |  see Record Format
    |               |
    |---------------|
    | record 1      |
    |               |
    |---------------|
    :               :
    |---------------|
    | record N      |
    |               |
    +---------------+


Record Format

    |--  32 bits  --|

    +---------------+
    | timestamp     |  epoch time
    |---------------|
    | sample        |  see Record Magic and Sample Formats
    +---------------+


Record Magic

    |--  16 bits  --|--  16 bits  --|

    +-------------------------------+
    | sample format | sample units  |
    +-------------------------------+


Sample Formats

U24 (0xa5f1)

    |-- 8 bits --|--             24 bits              --|

    +---------------------------------------------------+
    | exit code  | unsigned integer                     |
    +---------------------------------------------------+


Sample Units

microseconds (0x2fb5)