int/to-bytes

    cfunction
    src/core/inttypes.c on line 237, column 1

    (int/to-bytes value &opt endianness buffer)

    Write the bytes of an `int/s64` or `int/u64` into a buffer. The 
    `buffer` parameter specifies an existing buffer to write to, if 
    unset a new buffer will be created. Returns the modified buffer. 
    The `endianness` parameter indicates the byte order:

    $*$ `nil` (unset): system byte order
    $*$ `:le`: little-endian, least significant byte first
    $*$ `:be`: big-endian, most significant byte first