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Help in c++, going backwards through binary files

  • 29-03-2005 3:34pm
    #1
    Elfman
    Registered Users, Registered Users 2 Posts: 221 ✭✭


    I hope someone can help me
    i'm wondering how to search backwards through a binary file i havent
    done it in ages and can't remeber the notation

    if anyone can help that would be great thanks

    -Sean


Comments

  • #2
    Tobias Greeshman
    Registered Users, Registered Users 2 Posts: 2,082 ✭✭✭Tobias Greeshman


    int start_pos = fgetpos(fp, &start_pos);

    Use the seek function to move to the end of the file
    fseek(fp, SEEK_END, 0L);

    Then use the above function
    do {
    int i = fseek(fp, SEEK_END, -chunk);
    } while(i != start_pos);

    You get the idea, get start position, move to end of file, read data there move back x bytes read that data, continue until you reach the start of the file.

    My code is probably a bit off, but ya get the idea (i've written it in C, but C++ standard library has similar functions to do the same thing).


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