// this script is the command line wrapper for checksum.k
// usage: do_checksum.k <filename> <method> [<beg0> <end0>] ... [<begN> <endN>]
// Example: do_checksum.k test.bin crc16

if(Size(ARGV)<3; 
    PrintLn("Usage:"),
    PrintLn("do_checksum.k <filename> <method> [<beg0> <end0>] ... [<begN> <endN>]"),
    PrintLn("Example: do_checksum.k test.bin crc16"),
    PrintLn(),
    Error("wrong arguments")
);

Load("checksum.k");
// evaluate command line arguments
filename = ARGV[1];
method = Eval("'"+ARGV[2]+"(#)'"); // e.g. "crc16" -> 'crc16(#)'
if(Size(ARGV)>3; 
    // with segments, build segment list from ARGV first
    segments={}, for(i=0; i<Size(ARGV)-3; i+=2; segments+={{Eval(ARGV[i+3]),Eval(ARGV[i+4])}}),
    result=checksum(filename, method, segments);
    // without segments
    result=checksum(filename, method)
);
PrintLn(result);
PrintLn(Sprintf("Checksum = 0x%x", (u32) result));