hex - Delphi - Reading a file signature and compare them -


i need of little in delphi. have search in places can't find answer question.

how can read file signature(4 bytes in case) , put value in hex string? signature program have identify $4e4553a1.

i need test if file, example. c:\happy.bin. have signature. avoid people put wrong format files in software. signature first 4 bytes in it.

thank much, english isn't first language, sorry mistakes. love

this easiest. call , pass in filename.

function checksignature(afilename: string): boolean; var   signature: uint32;   myfile: tfilestream; begin   myfile := tfilestream.create(afilename, fmopenread or fmsharedenywrite);   try     if myfile.read(signature, sizeof(signature)) = sizeof(signature)       result := (signature = $a153454e)     else       result := false;       myfile.free;   end; end;

the signature reversed because of way integer stores it's data (little endian).

to use function call this:

begin   if checksignature('c:\happy.bin')     showmessage('matched')   else     showmessage('didn''t match'); end;

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