@JvmField
  val CONNECTION_PREFACE = "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n".encodeUtf8()

  /** The initial max frame size, applied independently writing to, or reading from the peer. */
  const val INITIAL_MAX_FRAME_SIZE = 0x4000 // 16384

  const val TYPE_DATA = 0x0
  const val TYPE_HEADERS = 0x1
  const val TYPE_PRIORITY = 0x2
  const val TYPE_RST_STREAM = 0x3
  const val TYPE_SETTINGS = 0x4
  const val TYPE_PUSH_PROMISE = 0x5

	Cur int64
	Max int64
}

type _Gid_t uint32

const (
	S_IFMT   = 0xf000
	S_IFIFO  = 0x1000
	S_IFCHR  = 0x2000
	S_IFDIR  = 0x4000
	S_IFBLK  = 0x6000
	S_IFREG  = 0x8000
	S_IFLNK  = 0xa000
	S_IFSOCK = 0xc000
	S_ISUID  = 0x800
	S_ISGID  = 0x400
	S_ISVTX  = 0x200
	S_IRUSR  = 0x100
	S_IWUSR  = 0x80
	S_IXUSR  = 0x40
	S_IRWXG  = 0x38
	S_IRWXO  = 0x7
)

const (
	_statfsVersion = 0x20140518

	Cur int64
	Max int64
}

type _Gid_t uint32

const (
	S_IFMT   = 0xf000
	S_IFIFO  = 0x1000
	S_IFCHR  = 0x2000
	S_IFDIR  = 0x4000
	S_IFBLK  = 0x6000
	S_IFREG  = 0x8000
	S_IFLNK  = 0xa000
	S_IFSOCK = 0xc000
	S_ISUID  = 0x800
	S_ISGID  = 0x400
	S_ISVTX  = 0x200
	S_IRUSR  = 0x100
	S_IWUSR  = 0x80
	S_IXUSR  = 0x40
	S_IRWXG  = 0x38
	S_IRWXO  = 0x7
)

const (
	_statfsVersion = 0x20140518

	Cur int64
	Max int64
}

type _Gid_t uint32

const (
	S_IFMT   = 0xf000
	S_IFIFO  = 0x1000
	S_IFCHR  = 0x2000
	S_IFDIR  = 0x4000
	S_IFBLK  = 0x6000
	S_IFREG  = 0x8000
	S_IFLNK  = 0xa000
	S_IFSOCK = 0xc000
	S_ISUID  = 0x800
	S_ISGID  = 0x400
	S_ISVTX  = 0x200
	S_IRUSR  = 0x100
	S_IWUSR  = 0x80
	S_IXUSR  = 0x40
	S_IRWXG  = 0x38
	S_IRWXO  = 0x7
)

const (
	_statfsVersion = 0x20140518

		},
		{
			v:       0x1001000,
			shift:   1,
			wantErr: true,
		},
		{
			v:       0xfffffe,
			shift:   2,
			wantErr: true,
		},
		{
			v:      0x4004,
			shift:  2,
			wantHi: 0x4000,
			wantLo: 0x1,
		},
		{
			v:      0xfffffc,
			shift:  2,
			wantHi: 0xffc000,
			wantLo: 0xfff,
		},
		{
			v:      0x1002ffc,
			shift:  2,
			wantHi: 0xfff000,
			wantLo: 0xfff,
		},

      Mapping(0x40100, 0x4017f, TYPE_DISALLOWED, ByteString.EMPTY),
      Mapping(0x40180, 0x40180, TYPE_DISALLOWED, ByteString.EMPTY),
    )
  }

  @Test fun withSectionStartAlreadySplit() {
    assertThat(
      withoutSectionSpans(
        listOf(
          Mapping(0x40000, 0x4007f, TYPE_DISALLOWED, ByteString.EMPTY),
          Mapping(0x40080, 0x400ff, TYPE_DISALLOWED, ByteString.EMPTY),
        ),

	O_TRUNC   = 16
	O_CLOEXEC = 32
	O_EXCL    = 0x1000
)

// Bind flags
const (
	MORDER  = 0x0003 // mask for bits defining order of mounting
	MREPL   = 0x0000 // mount replaces object
	MBEFORE = 0x0001 // mount goes before others in union directory
	MAFTER  = 0x0002 // mount goes after others in union directory
	MCREATE = 0x0004 // permit creation in mounted directory
	MCACHE  = 0x0010 // cache some data
	MMASK   = 0x0017 // all bits on

	// Entry 0 - 3F
	0x0000, 0x0000, 0x0001, 0x0001, 0x0000, 0x0004, 0x0000, 0x0006,
	0x0000, 0x0008, 0x0000, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a,
	0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a,
	0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a,
	0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x0000,
	0x0000, 0x0028, 0x0000, 0x002a, 0x0000, 0x002c, 0x0000, 0x0000,

	FILE_NOFOLLOW      = 0x10000000
	FILE_DELETE        = 0x10
	FILE_RENAME_TO     = 0x20
	FILE_RENAME_FROM   = 0x40
	UNMOUNTED          = 0x20000000
	MOUNTEDOVER        = 0x40000000
	FILE_EXCEPTION     = 0x60000070
)

const (
	TUNNEWPPA = 0x540001
	TUNSETPPA = 0x540002

	I_STR     = 0x5308
	I_POP     = 0x5303
	I_PUSH    = 0x5302
	I_LINK    = 0x530c
	I_UNLINK  = 0x530d

		}
	}
	return string(b)
}

func isSpace(r rune) bool {
	if r < 0x2000 {
		switch r {
		// Note: not the same as Unicode Z class.
		case '\t', '\n', '\v', '\f', '\r', ' ', 0x85, 0xA0, 0x1680:
			return true
		}
	} else {
		if r <= 0x200a {
			return true
		}
		switch r {
		case 0x2028, 0x2029, 0x202f, 0x205f, 0x3000:
			return true
		}
	}
	return false