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program hexfind;
uses
math;
type
tByteArray = array of byte;
procedure loadFile(out ar: tByteArray; nam: string);
var
f: file;
begin
assignfile(f,nam);
reset(f,1);
setlength(ar,filesize(f));
blockread(f,ar[0],length(ar));
closefile(f);
end;
function inttohex(b: byte): string;
const
h2s = '0123456789abcdef';
begin
result:=
h2s[1 + ((b and $f0) shr 4)]
+ h2s[1 + (b and $f)];
end;
var
haystack,needle: tByteArray;
iHay,iNee,i: longint;
const
matchLen = 10;
begin
if paramcount<>2 then begin
writeln('usage: '+paramstr(0)+' haystack needle');
halt(1);
end;
loadFile(haystack,paramstr(1));
loadFile(needle,paramstr(2));
for iHay:=1 to length(haystack)-matchlen do
for iNee:=0 to min(length(needle)-1,length(haystack)-iHay) do
if haystack[length(haystack)-iHay-iNee] <> needle[length(needle)-1-iNee] then begin
if iNee<matchLen then
break;
write('<');
for i:=0 to length(haystack)-iHay-iNee do
write(' '+inttohex(haystack[i]));
writeln;
write('>');
for i:=0 to length(needle)-1-iNee do
write(' '+inttohex(needle[i]));
writeln;
for i:=0 to 79 do
write('-');
writeln;
write('<');
for i:=length(haystack)-iHay+1 to length(haystack)-1 do
write(' '+inttohex(haystack[i]));
writeln;
setlength(haystack,0);
setlength(needle,0);
halt;
end;
setlength(haystack,0);
setlength(needle,0);
end.
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