magic

var (
	// SevenZ matches a 7z archive.
	SevenZ = prefix([]byte{0x37, 0x7A, 0xBC, 0xAF, 0x27, 0x1C})
	// Gzip matches gzip files based on http://www.zlib.org/rfc-gzip.html#header-trailer.
	Gzip = prefix([]byte{0x1f, 0x8b})
	// Fits matches an Flexible Image Transport System file.
	Fits = prefix([]byte{
		0x53, 0x49, 0x4D, 0x50, 0x4C, 0x45, 0x20, 0x20, 0x3D, 0x20,
		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x54,
	})
	// Xar matches an eXtensible ARchive format file.
	Xar = prefix([]byte{0x78, 0x61, 0x72, 0x21})
	// Bz2 matches a bzip2 file.
	Bz2 = prefix([]byte{0x42, 0x5A, 0x68})
	// Ar matches an ar (Unix) archive file.
	Ar = prefix([]byte{0x21, 0x3C, 0x61, 0x72, 0x63, 0x68, 0x3E})
	// Deb matches a Debian package file.
	Deb = offset([]byte{
		0x64, 0x65, 0x62, 0x69, 0x61, 0x6E, 0x2D,
		0x62, 0x69, 0x6E, 0x61, 0x72, 0x79,
	}, 8)
	// Warc matches a Web ARChive file.
	Warc = prefix([]byte("WARC/1.0"), []byte("WARC/1.1"))
	// Cab matches a Microsoft Cabinet archive file.
	Cab = prefix([]byte("MSCF\x00\x00\x00\x00"))
	// Xz matches an xz compressed stream based on https://tukaani.org/xz/xz-file-format.txt.
	Xz = prefix([]byte{0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00})
	// Lzip matches an Lzip compressed file.
	Lzip = prefix([]byte{0x4c, 0x5a, 0x49, 0x50})
	// RPM matches an RPM or Delta RPM package file.
	RPM = prefix([]byte{0xed, 0xab, 0xee, 0xdb}, []byte("drpm"))
	// Cpio matches a cpio archive file.
	Cpio = prefix([]byte("070707"), []byte("070701"), []byte("070702"))
	// RAR matches a RAR archive file.
	RAR = prefix([]byte("Rar!\x1A\x07\x00"), []byte("Rar!\x1A\x07\x01\x00"))
)

var (
	// Flac matches a Free Lossless Audio Codec file.
	Flac = prefix([]byte("\x66\x4C\x61\x43\x00\x00\x00\x22"))
	// Midi matches a Musical Instrument Digital Interface file.
	Midi = prefix([]byte("\x4D\x54\x68\x64"))
	// Ape matches a Monkey's Audio file.
	Ape = prefix([]byte("\x4D\x41\x43\x20\x96\x0F\x00\x00\x34\x00\x00\x00\x18\x00\x00\x00\x90\xE3"))
	// MusePack matches a Musepack file.
	MusePack = prefix([]byte("MPCK"))
	// Au matches a Sun Microsystems au file.
	Au = prefix([]byte("\x2E\x73\x6E\x64"))
	// Amr matches an Adaptive Multi-Rate file.
	Amr = prefix([]byte("\x23\x21\x41\x4D\x52"))
	// Voc matches a Creative Voice file.
	Voc = prefix([]byte("Creative Voice File"))
	// M3u matches a Playlist file.
	M3u = prefix([]byte("#EXTM3U"))
	// AAC matches an Advanced Audio Coding file.
	AAC = prefix([]byte{0xFF, 0xF1}, []byte{0xFF, 0xF9})
)

var (
	// Lnk matches Microsoft lnk binary format.
	Lnk = prefix([]byte{0x4C, 0x00, 0x00, 0x00, 0x01, 0x14, 0x02, 0x00})
	// Wasm matches a web assembly File Format file.
	Wasm = prefix([]byte{0x00, 0x61, 0x73, 0x6D})
	// Exe matches a Windows/DOS executable file.
	Exe = prefix([]byte{0x4D, 0x5A})
	// Elf matches an Executable and Linkable Format file.
	Elf = prefix([]byte{0x7F, 0x45, 0x4C, 0x46})
	// Nes matches a Nintendo Entertainment system ROM file.
	Nes = prefix([]byte{0x4E, 0x45, 0x53, 0x1A})
	// SWF matches an Adobe Flash swf file.
	SWF = prefix([]byte("CWS"), []byte("FWS"), []byte("ZWS"))
	// Torrent has bencoded text in the beginning.
	Torrent = prefix([]byte("d8:announce"))
)

var (
	// Sqlite matches an SQLite database file.
	Sqlite = prefix([]byte{
		0x53, 0x51, 0x4c, 0x69, 0x74, 0x65, 0x20, 0x66,
		0x6f, 0x72, 0x6d, 0x61, 0x74, 0x20, 0x33, 0x00,
	})
	// MsAccessAce matches Microsoft Access dababase file.
	MsAccessAce = offset([]byte("Standard ACE DB"), 4)
	// MsAccessMdb matches legacy Microsoft Access database file (JET, 2003 and earlier).
	MsAccessMdb = offset([]byte("Standard Jet DB"), 4)
)

var (
	// Pdf matches a Portable Document Format file.
	Pdf = prefix([]byte{0x25, 0x50, 0x44, 0x46})
	// Fdf matches a Forms Data Format file.
	Fdf = prefix([]byte("%FDF"))
	// Mobi matches a Mobi file.
	Mobi = offset([]byte("BOOKMOBI"), 60)
	// Lit matches a Microsoft Lit file.
	Lit = prefix([]byte("ITOLITLS"))
)

var (
	// Woff matches a Web Open Font Format file.
	Woff = prefix([]byte("wOFF"))
	// Woff2 matches a Web Open Font Format version 2 file.
	Woff2 = prefix([]byte("wOF2"))
	// Otf matches an OpenType font file.
	Otf = prefix([]byte{0x4F, 0x54, 0x54, 0x4F, 0x00})
)

var (
	// AVIF matches an AV1 Image File Format still or animated.
	// Wikipedia page seems outdated listing image/avif-sequence for animations.
	// https://github.com/AOMediaCodec/av1-avif/issues/59
	AVIF = ftyp([]byte("avif"), []byte("avis"))
	// Mp4 matches an MP4 file.
	Mp4 = ftyp(
		[]byte("avc1"), []byte("dash"), []byte("iso2"), []byte("iso3"),
		[]byte("iso4"), []byte("iso5"), []byte("iso6"), []byte("isom"),
		[]byte("mmp4"), []byte("mp41"), []byte("mp42"), []byte("mp4v"),
		[]byte("mp71"), []byte("MSNV"), []byte("NDAS"), []byte("NDSC"),
		[]byte("NSDC"), []byte("NSDH"), []byte("NDSM"), []byte("NDSP"),
		[]byte("NDSS"), []byte("NDXC"), []byte("NDXH"), []byte("NDXM"),
		[]byte("NDXP"), []byte("NDXS"), []byte("F4V "), []byte("F4P "),
	)
	// ThreeGP matches a 3GPP file.
	ThreeGP = ftyp(
		[]byte("3gp1"), []byte("3gp2"), []byte("3gp3"), []byte("3gp4"),
		[]byte("3gp5"), []byte("3gp6"), []byte("3gp7"), []byte("3gs7"),
		[]byte("3ge6"), []byte("3ge7"), []byte("3gg6"),
	)
	// ThreeG2 matches a 3GPP2 file.
	ThreeG2 = ftyp(
		[]byte("3g24"), []byte("3g25"), []byte("3g26"), []byte("3g2a"),
		[]byte("3g2b"), []byte("3g2c"), []byte("KDDI"),
	)
	// AMp4 matches an audio MP4 file.
	AMp4 = ftyp(

		[]byte("F4A "), []byte("F4B "),

		[]byte("M4B "), []byte("M4P "),

		[]byte("MSNV"),

		[]byte("NDAS"),
	)
	// QuickTime matches a QuickTime File Format file.
	QuickTime = ftyp([]byte("qt  "), []byte("moov"))
	// Mqv matches a Sony / Mobile QuickTime  file.
	Mqv = ftyp([]byte("mqt "))
	// M4a matches an audio M4A file.
	M4a = ftyp([]byte("M4A "))
	// M4v matches an Appl4 M4V video file.
	M4v = ftyp([]byte("M4V "), []byte("M4VH"), []byte("M4VP"))
	// Heic matches a High Efficiency Image Coding (HEIC) file.
	Heic = ftyp([]byte("heic"), []byte("heix"))
	// HeicSequence matches a High Efficiency Image Coding (HEIC) file sequence.
	HeicSequence = ftyp([]byte("hevc"), []byte("hevx"))
	// Heif matches a High Efficiency Image File Format (HEIF) file.
	Heif = ftyp([]byte("mif1"), []byte("heim"), []byte("heis"), []byte("avic"))
	// HeifSequence matches a High Efficiency Image File Format (HEIF) file sequence.
	HeifSequence = ftyp([]byte("msf1"), []byte("hevm"), []byte("hevs"), []byte("avcs"))
)

var (
	// Png matches a Portable Network Graphics file.
	// https://www.w3.org/TR/PNG/
	Png = prefix([]byte{0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A})
	// Apng matches an Animated Portable Network Graphics file.
	// https://wiki.mozilla.org/APNG_Specification
	Apng = offset([]byte("acTL"), 37)
	// Jpg matches a Joint Photographic Experts Group file.
	Jpg = prefix([]byte{0xFF, 0xD8, 0xFF})
	// Jp2 matches a JPEG 2000 Image file (ISO 15444-1).
	Jp2 = jpeg2k([]byte{0x6a, 0x70, 0x32, 0x20})
	// Jpx matches a JPEG 2000 Image file (ISO 15444-2).
	Jpx = jpeg2k([]byte{0x6a, 0x70, 0x78, 0x20})
	// Jpm matches a JPEG 2000 Image file (ISO 15444-6).
	Jpm = jpeg2k([]byte{0x6a, 0x70, 0x6D, 0x20})
	// Gif matches a Graphics Interchange Format file.
	Gif = prefix([]byte("GIF87a"), []byte("GIF89a"))
	// Bmp matches a bitmap image file.
	Bmp = prefix([]byte{0x42, 0x4D})
	// Ps matches a PostScript file.
	Ps = prefix([]byte("%!PS-Adobe-"))
	// Psd matches a Photoshop Document file.
	Psd = prefix([]byte("8BPS"))
	// Ico matches an ICO file.
	Ico = prefix([]byte{0x00, 0x00, 0x01, 0x00}, []byte{0x00, 0x00, 0x02, 0x00})
	// Icns matches an ICNS (Apple Icon Image format) file.
	Icns = prefix([]byte("icns"))
	// Tiff matches a Tagged Image File Format file.
	Tiff = prefix([]byte{0x49, 0x49, 0x2A, 0x00}, []byte{0x4D, 0x4D, 0x00, 0x2A})
	// Bpg matches a Better Portable Graphics file.
	Bpg = prefix([]byte{0x42, 0x50, 0x47, 0xFB})
	// Xcf matches GIMP image data.
	Xcf = prefix([]byte("gimp xcf"))
	// Pat matches GIMP pattern data.
	Pat = offset([]byte("GPAT"), 20)
	// Gbr matches GIMP brush data.
	Gbr = offset([]byte("GIMP"), 20)
	// Hdr matches Radiance HDR image.
	// https://web.archive.org/web/20060913152809/http://local.wasp.uwa.edu.au/~pbourke/dataformats/pic/
	Hdr = prefix([]byte("#?RADIANCE\n"))
	// Xpm matches X PixMap image data.
	Xpm = prefix([]byte{0x2F, 0x2A, 0x20, 0x58, 0x50, 0x4D, 0x20, 0x2A, 0x2F})
)

var (
	// HTML matches a Hypertext Markup Language file.
	HTML = markup(
		[]byte("<!DOCTYPE HTML"),
		[]byte("<HTML"),
		[]byte("<HEAD"),
		[]byte("<SCRIPT"),
		[]byte("<IFRAME"),
		[]byte("<H1"),
		[]byte("<DIV"),
		[]byte("<FONT"),
		[]byte("<TABLE"),
		[]byte("<A"),
		[]byte("<STYLE"),
		[]byte("<TITLE"),
		[]byte("<B"),
		[]byte("<BODY"),
		[]byte("<BR"),
		[]byte("<P"),
	)
	// XML matches an Extensible Markup Language file.
	XML = markup([]byte("<?XML"))
	// Owl2 matches an Owl ontology file.
	Owl2 = xml(newXMLSig("Ontology", `xmlns="http://www.w3.org/2002/07/owl#"`))
	// Rss matches a Rich Site Summary file.
	Rss = xml(newXMLSig("rss", ""))
	// Atom matches an Atom Syndication Format file.
	Atom = xml(newXMLSig("feed", `xmlns="http://www.w3.org/2005/Atom"`))
	// Kml matches a Keyhole Markup Language file.
	Kml = xml(
		newXMLSig("kml", `xmlns="http://www.opengis.net/kml/2.2"`),
		newXMLSig("kml", `xmlns="http://earth.google.com/kml/2.0"`),
		newXMLSig("kml", `xmlns="http://earth.google.com/kml/2.1"`),
		newXMLSig("kml", `xmlns="http://earth.google.com/kml/2.2"`),
	)
	// Xliff matches a XML Localization Interchange File Format file.
	Xliff = xml(newXMLSig("xliff", `xmlns="urn:oasis:names:tc:xliff:document:1.2"`))
	// Collada matches a COLLAborative Design Activity file.
	Collada = xml(newXMLSig("COLLADA", `xmlns="http://www.collada.org/2005/11/COLLADASchema"`))
	// Gml matches a Geography Markup Language file.
	Gml = xml(
		newXMLSig("", `xmlns:gml="http://www.opengis.net/gml"`),
		newXMLSig("", `xmlns:gml="http://www.opengis.net/gml/3.2"`),
		newXMLSig("", `xmlns:gml="http://www.opengis.net/gml/3.3/exr"`),
	)
	// Gpx matches a GPS Exchange Format file.
	Gpx = xml(newXMLSig("gpx", `xmlns="http://www.topografix.com/GPX/1/1"`))
	// Tcx matches a Training Center XML file.
	Tcx = xml(newXMLSig("TrainingCenterDatabase", `xmlns="http://www.garmin.com/xmlschemas/TrainingCenterDatabase/v2"`))
	// X3d matches an Extensible 3D Graphics file.
	X3d = xml(newXMLSig("X3D", `xmlns:xsd="http://www.w3.org/2001/XMLSchema-instance"`))
	// Amf matches an Additive Manufacturing XML file.
	Amf = xml(newXMLSig("amf", ""))
	// Threemf matches a 3D Manufacturing Format file.
	Threemf = xml(newXMLSig("model", `xmlns="http://schemas.microsoft.com/3dmanufacturing/core/2015/02"`))
	// Xfdf matches a XML Forms Data Format file.
	Xfdf = xml(newXMLSig("xfdf", `xmlns="http://ns.adobe.com/xfdf/"`))
	// VCard matches a Virtual Contact File.
	VCard = ciPrefix([]byte("BEGIN:VCARD\n"), []byte("BEGIN:VCARD\r\n"))
	// ICalendar matches a iCalendar file.
	ICalendar = ciPrefix([]byte("BEGIN:VCALENDAR\n"), []byte("BEGIN:VCALENDAR\r\n"))

	// Js matches a Javascript file.
	Js = shebang(
		[]byte("/bin/node"),
		[]byte("/usr/bin/node"),
		[]byte("/bin/nodejs"),
		[]byte("/usr/bin/nodejs"),
		[]byte("/usr/bin/env node"),
		[]byte("/usr/bin/env nodejs"),
	)
	// Lua matches a Lua programming language file.
	Lua = shebang(
		[]byte("/usr/bin/lua"),
		[]byte("/usr/local/bin/lua"),
		[]byte("/usr/bin/env lua"),
	)
	// Perl matches a Perl programming language file.
	Perl = shebang(
		[]byte("/usr/bin/perl"),
		[]byte("/usr/bin/env perl"),
	)
	// Python matches a Python programming language file.
	Python = shebang(
		[]byte("/usr/bin/python"),
		[]byte("/usr/local/bin/python"),
		[]byte("/usr/bin/env python"),
	)
	// Tcl matches a Tcl programming language file.
	Tcl = shebang(
		[]byte("/usr/bin/tcl"),
		[]byte("/usr/local/bin/tcl"),
		[]byte("/usr/bin/env tcl"),
		[]byte("/usr/bin/tclsh"),
		[]byte("/usr/local/bin/tclsh"),
		[]byte("/usr/bin/env tclsh"),
		[]byte("/usr/bin/wish"),
		[]byte("/usr/local/bin/wish"),
		[]byte("/usr/bin/env wish"),
	)
	// Rtf matches a Rich Text Format file.
	Rtf = prefix([]byte("{\\rtf1"))
)

var (
	// Flv matches a Flash video file.
	Flv = prefix([]byte("\x46\x4C\x56\x01"))
	// Asf matches an Advanced Systems Format file.
	Asf = prefix([]byte{
		0x30, 0x26, 0xB2, 0x75, 0x8E, 0x66, 0xCF, 0x11,
		0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C,
	})
	// Rmvb matches a RealMedia Variable Bitrate file.
	Rmvb = prefix([]byte{0x2E, 0x52, 0x4D, 0x46})
)

var (
	// Odt matches an OpenDocument Text file.
	Odt = offset([]byte("mimetypeapplication/vnd.oasis.opendocument.text"), 30)
	// Ott matches an OpenDocument Text Template file.
	Ott = offset([]byte("mimetypeapplication/vnd.oasis.opendocument.text-template"), 30)
	// Ods matches an OpenDocument Spreadsheet file.
	Ods = offset([]byte("mimetypeapplication/vnd.oasis.opendocument.spreadsheet"), 30)
	// Ots matches an OpenDocument Spreadsheet Template file.
	Ots = offset([]byte("mimetypeapplication/vnd.oasis.opendocument.spreadsheet-template"), 30)
	// Odp matches an OpenDocument Presentation file.
	Odp = offset([]byte("mimetypeapplication/vnd.oasis.opendocument.presentation"), 30)
	// Otp matches an OpenDocument Presentation Template file.
	Otp = offset([]byte("mimetypeapplication/vnd.oasis.opendocument.presentation-template"), 30)
	// Odg matches an OpenDocument Drawing file.
	Odg = offset([]byte("mimetypeapplication/vnd.oasis.opendocument.graphics"), 30)
	// Otg matches an OpenDocument Drawing Template file.
	Otg = offset([]byte("mimetypeapplication/vnd.oasis.opendocument.graphics-template"), 30)
	// Odf matches an OpenDocument Formula file.
	Odf = offset([]byte("mimetypeapplication/vnd.oasis.opendocument.formula"), 30)
	// Odc matches an OpenDocument Chart file.
	Odc = offset([]byte("mimetypeapplication/vnd.oasis.opendocument.chart"), 30)
	// Epub matches an EPUB file.
	Epub = offset([]byte("mimetypeapplication/epub+zip"), 30)
	// Sxc matches an OpenOffice Spreadsheet file.
	Sxc = offset([]byte("mimetypeapplication/vnd.sun.xml.calc"), 30)
)

var Glb = prefix([]byte("\x67\x6C\x54\x46\x02\x00\x00\x00"),
	[]byte("\x67\x6C\x54\x46\x01\x00\x00\x00"))