100 // The number of content bytes we need to use all our magic numbers.  Feel free
101 // to increase this number if you add a longer magic number.
106   const std::string_view magic;  member
108   const char* const mask;  // if set, must have same length as |magic|
111 #define MAGIC_NUMBER(mime_type, magic) \  argument
112   { (mime_type), std::string_view((magic), sizeof(magic) - 1), false, nullptr }
122 #define verified_sizeof(magic, mask) \  argument
123 VerifySizes<sizeof(magic), sizeof(mask)>::SIZES
125 #define MAGIC_MASK(mime_type, magic, mask)                                    \  argument
127     (mime_type), std::string_view((magic), verified_sizeof(magic, mask) - 1), \
131 // Magic strings are case insensitive and must not include '\0' characters
132 #define MAGIC_STRING(mime_type, magic) \  argument
133   { (mime_type), std::string_view((magic), sizeof(magic) - 1), true, nullptr }
170   // Including these magic number for Flash is a trade off.
184 // The number of content bytes we need to use all our Microsoft Office magic
285 // Compare content header to a magic number where magic_entry can contain '.'
315   DCHECK_LE(magic_entry.magic.length(), kBytesRequiredForMagic);  in MatchMagicNumber()
318   if (content.length() >= magic_entry.magic.length()) {  in MatchMagicNumber()
321       DCHECK_EQ(std::string_view::npos, magic_entry.magic.find('\0'));  in MatchMagicNumber()
324       match = base::StartsWith(content, magic_entry.magic,  in MatchMagicNumber()
327       match = MagicCmp(content, magic_entry.magic);  in MatchMagicNumber()
329       std::string_view magic_mask(magic_entry.mask, magic_entry.magic.length());  in MatchMagicNumber()
330       match = MagicMaskCmp(content, magic_entry.magic, magic_mask);  in MatchMagicNumber()
344   for (const MagicNumber& magic : magic_numbers) {  in CheckForMagicNumbers()  local
345     if (MatchMagicNumber(content, magic, result))  in CheckForMagicNumbers()
387   // Check our big table of Magic Numbers  in SniffForMagicNumbers()
401   // Check our table of magic numbers for Office file types.  in SniffForOfficeDocs()
493   // Check our table of magic numbers for Office file types.  If it does not  in SniffForInvalidOfficeDocs()
642   // Technically, the crx magic number is just Cr24, but the bytes after that  in SniffCRX()
777   // Check the file extension and magic numbers to see if this is an Office  in SniffMimeType()
778   // document.  This needs to be checked before the general magic numbers  in SniffMimeType()
779   // because zip files and Office documents (OOXML) have the same magic number.  in SniffMimeType()
781     return true;  // We've matched a magic number.  No more content needed.  in SniffMimeType()
784   // We're not interested in sniffing for magic numbers when the type_hint  in SniffMimeType()
789   // Now we look in our large table of magic numbers to see if we can find  in SniffMimeType()
792     return true;  // We've matched a magic number.  No more content needed.  in SniffMimeType()