//--------------------------------------
// Gets the file name only from a given full path
// @full_path   GetFileName()
// @result      file name
//--------------------------------------
char[] get_filename(char full_path[])
{
   
    int i;
    int     length, del_index;
    char    file_name[];

    length = Strlen(full_path);
    file_name = full_path;
    i=0;
    while(Strstr(file_name, "\\") > -1)
    {
        del_index = Strstr(file_name, "\\");
        file_name = SubStr(file_name, del_index+1, 0);
    }
   
    return file_name;
}

//--------------------------------------
// Get the index of an opened file
// @file_name   The name of an opened file
// @result      index (can be used with FileSelect) of the opened file
//              -1 for no file found
//--------------------------------------
int get_fileindex(char file_name[])
{
    int         i, total_files;
    int         cur_fileindex, rtn_index;
    string      tmp_filename;
   
    // Set default index: no file found
    rtn_index = -1;

    // At the end, we want to return to our current script
    // So set the current file index that can be used later on
    cur_fileindex = GetFileNum();

    // Get the total files opened;
    total_files = FileCount();

    // We will run through each file opened;
    // Then we will select the file, check the file name, and then move to the next file
    for(i = 0; i < total_files; i++)
    {
        // Open first file
        FileSelect(i); 
       
        // Get file name
        tmp_filename = get_filename(GetFileName());

        // Check for a match
        if(tmp_filename == file_name)
        {
            rtn_index = GetFileNum();
            break;
        }
    }
    FileSelect(cur_fileindex);
    return rtn_index;
}