Thread: Load values from end of file (exe)

  1. #1
    Registered User
    Join Date
    Jan 2012

    Load values from end of file (exe)


    I'm writing an application which saving some values to EXE file.
    I wrote 'SaveToEXE' function.

    Now I've got a problem.
    How to read saved values in EXE file? Values are stored at the end of the file. How to read this string:

    Load values from end of file (exe)-generator-jpg

    I found the function LoadFromEXE, but in Delphi:

    FUNCTION LoadFromFile(FName: string): string;
    F: File of Byte;
    I: Integer;
    Result := '';
    AssignFile(F, FName);
    FileMode := fmOpenRead;
    Seek(F, FileSize(F) - SizeOf(I));
    BlockRead(F, I, SizeOf(I));
    if (I < SizeOf(I)) or (I > FileSize(F)) then
    Seek(F, FileSize(F) - I);
    SetLength(Result, I - SizeOf(I));
    BlockRead(F, Result[1], Length(Result));
    XXX := Result;
    How to do it in C++?

    // Sorry for my english.

    Last edited by Kirgeron; 01-01-2012 at 06:53 AM.

  2. #2
    - - - - - - - - oogabooga's Avatar
    Join Date
    Jan 2008
    If you're just learning C++ perhaps you should start on something a little easier. However, since the exe file is just a file, you could open it (in binary mode) and either seek to a fixed number of bytes from the end (easiest) or seek to the end and search backwards for a delimiter to find your data. But why would you want to do this anyway?

  3. #3
    Algorithm Dissector iMalc's Avatar
    Join Date
    Dec 2005
    New Zealand
    What does SaveToEXE look like? Knowing will make it a lot easier to getLoadFromEXE correct.
    Also, do you know about program resources? They are the correct way to deal with this kind of thing.
    My homepage
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  4. #4
    Officially An Architect brewbuck's Avatar
    Join Date
    Mar 2007
    Portland, OR
    Quote Originally Posted by oogabooga View Post
    But why would you want to do this anyway?
    You'd want to do it if you're writing a virus that appends its own code and resources to the end of an executable.
    	if (a) do { f( b); } while(1);
    	else   do { f(!b); } while(1);

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