ZX_STREAM_MODE_READ = 1
ZX_STREAM_MODE_WRITE = 2
ZX_STREAM_MODE_APPEND = 4
ZX_STREAM_CREATE_MASK = 7
ZX_STREAM_APPEND = 1
ZX_STREAM_SEEK_ORIGIN_START = 0
ZX_STREAM_SEEK_ORIGIN_CURRENT = 1
ZX_STREAM_SEEK_ORIGIN_END = 2