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pub fn is_epub(buf: &[u8]) -> bool {
buf.len() > 57
&& buf[0] == 0x50
&& buf[1] == 0x4B
&& buf[2] == 0x3
&& buf[3] == 0x4
&& buf[30] == 0x6D
&& buf[31] == 0x69
&& buf[32] == 0x6D
&& buf[33] == 0x65
&& buf[34] == 0x74
&& buf[35] == 0x79
&& buf[36] == 0x70
&& buf[37] == 0x65
&& buf[38] == 0x61
&& buf[39] == 0x70
&& buf[40] == 0x70
&& buf[41] == 0x6C
&& buf[42] == 0x69
&& buf[43] == 0x63
&& buf[44] == 0x61
&& buf[45] == 0x74
&& buf[46] == 0x69
&& buf[47] == 0x6F
&& buf[48] == 0x6E
&& buf[49] == 0x2F
&& buf[50] == 0x65
&& buf[51] == 0x70
&& buf[52] == 0x75
&& buf[53] == 0x62
&& buf[54] == 0x2B
&& buf[55] == 0x7A
&& buf[56] == 0x69
&& buf[57] == 0x70
}
pub fn is_zip(buf: &[u8]) -> bool {
buf.len() > 3
&& buf[0] == 0x50
&& buf[1] == 0x4B
&& (buf[2] == 0x3 || buf[2] == 0x5 || buf[2] == 0x7)
&& (buf[3] == 0x4 || buf[3] == 0x6 || buf[3] == 0x8)
}
pub fn is_tar(buf: &[u8]) -> bool {
buf.len() > 261
&& buf[257] == 0x75
&& buf[258] == 0x73
&& buf[259] == 0x74
&& buf[260] == 0x61
&& buf[261] == 0x72
}
pub fn is_rar(buf: &[u8]) -> bool {
buf.len() > 6
&& buf[0] == 0x52
&& buf[1] == 0x61
&& buf[2] == 0x72
&& buf[3] == 0x21
&& buf[4] == 0x1A
&& buf[5] == 0x7
&& (buf[6] == 0x0 || buf[6] == 0x1)
}
pub fn is_gz(buf: &[u8]) -> bool {
buf.len() > 2 && buf[0] == 0x1F && buf[1] == 0x8B && buf[2] == 0x8
}
pub fn is_bz2(buf: &[u8]) -> bool {
buf.len() > 2 && buf[0] == 0x42 && buf[1] == 0x5A && buf[2] == 0x68
}
pub fn is_7z(buf: &[u8]) -> bool {
buf.len() > 5
&& buf[0] == 0x37
&& buf[1] == 0x7A
&& buf[2] == 0xBC
&& buf[3] == 0xAF
&& buf[4] == 0x27
&& buf[5] == 0x1C
}
pub fn is_pdf(buf: &[u8]) -> bool {
buf.len() > 3 && buf[0] == 0x25 && buf[1] == 0x50 && buf[2] == 0x44 && buf[3] == 0x46
}
pub fn is_swf(buf: &[u8]) -> bool {
buf.len() > 2 && (buf[0] == 0x43 || buf[0] == 0x46) && buf[1] == 0x57 && buf[2] == 0x53
}
pub fn is_rtf(buf: &[u8]) -> bool {
buf.len() > 4
&& buf[0] == 0x7B
&& buf[1] == 0x5C
&& buf[2] == 0x72
&& buf[3] == 0x74
&& buf[4] == 0x66
}
pub fn is_nes(buf: &[u8]) -> bool {
buf.len() > 3 && buf[0] == 0x4E && buf[1] == 0x45 && buf[2] == 0x53 && buf[3] == 0x1A
}
pub fn is_crx(buf: &[u8]) -> bool {
buf.len() > 3 && buf[0] == 0x43 && buf[1] == 0x72 && buf[2] == 0x32 && buf[3] == 0x34
}
pub fn is_cab(buf: &[u8]) -> bool {
buf.len() > 3
&& ((buf[0] == 0x4D && buf[1] == 0x53 && buf[2] == 0x43 && buf[3] == 0x46)
|| (buf[0] == 0x49 && buf[1] == 0x53 && buf[2] == 0x63 && buf[3] == 0x28))
}
pub fn is_eot(buf: &[u8]) -> bool {
buf.len() > 35
&& buf[34] == 0x4C
&& buf[35] == 0x50
&& ((buf[8] == 0x02 && buf[9] == 0x00 && buf[10] == 0x01)
|| (buf[8] == 0x01 && buf[9] == 0x00 && buf[10] == 0x00)
|| (buf[8] == 0x02 && buf[9] == 0x00 && buf[10] == 0x02))
}
pub fn is_ps(buf: &[u8]) -> bool {
buf.len() > 1 && buf[0] == 0x25 && buf[1] == 0x21
}
pub fn is_xz(buf: &[u8]) -> bool {
buf.len() > 5
&& buf[0] == 0xFD
&& buf[1] == 0x37
&& buf[2] == 0x7A
&& buf[3] == 0x58
&& buf[4] == 0x5A
&& buf[5] == 0x00
}
pub fn is_sqlite(buf: &[u8]) -> bool {
buf.len() > 3 && buf[0] == 0x53 && buf[1] == 0x51 && buf[2] == 0x4C && buf[3] == 0x69
}
pub fn is_deb(buf: &[u8]) -> bool {
buf.len() > 20
&& buf[0] == 0x21
&& buf[1] == 0x3C
&& buf[2] == 0x61
&& buf[3] == 0x72
&& buf[4] == 0x63
&& buf[5] == 0x68
&& buf[6] == 0x3E
&& buf[7] == 0x0A
&& buf[8] == 0x64
&& buf[9] == 0x65
&& buf[10] == 0x62
&& buf[11] == 0x69
&& buf[12] == 0x61
&& buf[13] == 0x6E
&& buf[14] == 0x2D
&& buf[15] == 0x62
&& buf[16] == 0x69
&& buf[17] == 0x6E
&& buf[18] == 0x61
&& buf[19] == 0x72
&& buf[20] == 0x79
}
pub fn is_ar(buf: &[u8]) -> bool {
buf.len() > 6
&& buf[0] == 0x21
&& buf[1] == 0x3C
&& buf[2] == 0x61
&& buf[3] == 0x72
&& buf[4] == 0x63
&& buf[5] == 0x68
&& buf[6] == 0x3E
}
pub fn is_z(buf: &[u8]) -> bool {
buf.len() > 1 && buf[0] == 0x1F && (buf[1] == 0xA0 || buf[1] == 0x9D)
}
pub fn is_lz(buf: &[u8]) -> bool {
buf.len() > 3 && buf[0] == 0x4C && buf[1] == 0x5A && buf[2] == 0x49 && buf[3] == 0x50
}
pub fn is_rpm(buf: &[u8]) -> bool {
buf.len() > 96 && buf[0] == 0xED && buf[1] == 0xAB && buf[2] == 0xEE && buf[3] == 0xDB
}
pub fn is_dcm(buf: &[u8]) -> bool {
buf.len() > 131 && buf[128] == 0x44 && buf[129] == 0x49 && buf[130] == 0x43 && buf[131] == 0x4D
}
pub fn is_zst(buf: &[u8]) -> bool {
buf.len() > 3 && buf[0] == 0x28 && buf[1] == 0xB5 && buf[2] == 0x2F && buf[3] == 0xFD
}