/* ==================================================================

    FILE: "/home/joze/src/tclreadline/tclreadline.c"
    LAST MODIFICATION: "Fri Sep 10 02:57:55 1999 (joze)"
    (C) 1998, 1999 by Johannes Zellner, <johannes@zellner.org>
    $Id$
    ---

    tclreadline -- gnu readline for tcl
    Copyright (C) 1999  Johannes Zellner

}
#endif

int
TclReadlineInitialize(Tcl_Interp* interp, char* historyfile)
{
    rl_readline_name = "tclreadline";
    //    rl_special_prefixes = "${\"[";
    rl_special_prefixes = "$";
    /**
     * default is " \t\n\"\\'`@$><=;|&{("
     * removed "(" <-- arrays
     * removed "{" <-- `${' variables 
     * removed "<" <-- completion lists with < ... >
     * added "[]"
     * added "}"
     */
    rl_basic_word_break_characters = " \t\n\"\\@$}>=;|&[]";
    // rl_basic_quote_characters = "\"{"; // XXX ??? XXX
    // rl_completer_quote_characters = "\"";
    /*
    rl_filename_quote_characters
    = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

    rl_filename_quoting_function
        = (CPFunction*) TclReadlineFilenameQuotingFunction;
    */

    return 1;
}

char**
TclReadlineCompletion(char* text, int start, int end)
{
    char** matches = (char**) NULL;
    int status;
    // rl_attempted_completion_over = 0;

#if 0
    fprintf(stderr, "DEBUG> TclReadlineCompletion: text=|%s|\n", text);
    fprintf(stderr, "DEBUG> TclReadlineCompletion: start=|%d|\n", start);
    fprintf(stderr, "DEBUG> TclReadlineCompletion: end=|%d|\n", end);
#endif

    if (history_event)
#endif

    if (text && ('!' == text[0]
            || (start && rl_line_buffer[start - 1] == '!' /* for '$' */))) {
        char* expansion = (char*) NULL;
        int oldlen = strlen(rl_line_buffer);
        status = history_expand(rl_line_buffer, &expansion);
        if (status >= 1) {
            rl_extend_line_buffer(strlen(expansion) + 1);
            strcpy(rl_line_buffer, expansion);
            rl_end = strlen(expansion);
            rl_point += strlen(expansion) - oldlen;
            FREE(expansion);
            /* rl_redisplay(); */

        FREE(quoted_text);
        FREE(quoted_rl_line_buffer);
        if (TCL_OK != tclrl_state) {
            rl_callback_handler_remove();
            Tcl_AppendResult (tclrl_interp, " `", tclrl_custom_completer,
                " \"", quoted_text, "\" ", start_s, " ", end_s,
                " \"", quoted_rl_line_buffer, "\"' failed.", (char*) NULL);
            return matches;
        }
#if 0
        fprintf(stderr, "\nscript returned |%s|\n",
            Tcl_GetStringResult(tclrl_interp));
#endif


        obj = Tcl_GetObjResult(tclrl_interp);
        status = Tcl_ListObjGetElements(tclrl_interp, obj, &objc, &objv);
        if (TCL_OK != status)
            return matches;
        /* fprintf (stderr, "(TclReadlineCompletion) objc = %d\n", objc); */
        if (objc) {
            int i, length;
            matches = (char**) MALLOC(sizeof(char*) * (objc + 1));
            for (i = 0; i < objc; i++) {
                matches[i] = strdup(Tcl_GetStringFromObj(objv[i], &length));
                if (1 == objc && !strlen(matches[i])) {
                    // rl_attempted_completion_over = 1;
                    FREE(matches[i]);
                    FREE(matches);
                    return (char**) NULL;
                }
                /*
                fprintf (stderr, "(TclReadlineCompletion) len[%s]=%d\n",
                    matches[i], strlen(matches[i]));