}

@JvmField
val EMPTY_BYTE_ARRAY: ByteArray = ByteArray(0)

/** Byte order marks. */
internal val UNICODE_BOMS =
  Options.of(
    // UTF-8.
    "efbbbf".decodeHex(),
    // UTF-16BE.
    "feff".decodeHex(),
    // UTF-16LE.
    "fffe".decodeHex(),
    // UTF-32BE.
    "0000ffff".decodeHex(),
    // UTF-32LE.
    "ffff0000".decodeHex(),
  )

/**

            "::1.2.3.4",
            "3ffe::1",
            "::",
            "::1",
            "2001:db8::0040:5efe:102:304",
            "2001:db8::5ffe:102:304",
            "2001:db8::5eff:102:304",
            "2001:0:102:203:200:5efe:506:708" // Teredo address; not ISATAP
            );

    for (String validIsatapAddress : validIsatapAddresses) {

            "::1.2.3.4",
            "3ffe::1",
            "::",
            "::1",
            "2001:db8::0040:5efe:102:304",
            "2001:db8::5ffe:102:304",
            "2001:db8::5eff:102:304",
            "2001:0:102:203:200:5efe:506:708" // Teredo address; not ISATAP
            );

    for (String validIsatapAddress : validIsatapAddresses) {

# U+3000 is mapped to U+0020 (space) which is disallowed
http://GOO\u00a0\u3000goo.com

# Other types of space (no-break, zero-width, zero-width-no-break) are
# name-prepped away to nothing.
# U+200B, U+2060, and U+FEFF, are ignored
http://GOO\u200b\u2060\ufeffgoo.com  s:http p:/ h:googoo.com

# Ideographic full stop (full-width period for Chinese, etc.) should be
# treated as a dot.
# U+3002 is mapped to U+002E (dot)

pkg image, method (*RGBA) RGBAAt(int, int) color.RGBA
pkg image, method (*RGBA64) RGBA64At(int, int) color.RGBA64
pkg image, method (*YCbCr) YCbCrAt(int, int) color.YCbCr

# CL 129190043 png: make the encoder configurable, Jeff R. Allen <******@****.***>
pkg image/png, const BestCompression = -3
pkg image/png, const BestCompression CompressionLevel
pkg image/png, const BestSpeed = -2
pkg image/png, const BestSpeed CompressionLevel