Function backup

source/src/stream.cpp:490–496

}

void backup(char *name, char *backupname)
{
    string backupfile;
    copystring(backupfile, findfile(backupname, "wb"));
    remove(backupfile);
    rename(findfile(name, "wb"), backupfile);
}

#ifndef STANDALONE
static Sint64 rwopsseek(SDL_RWops *rw, Sint64 offset, int whence)