Class TclTkIp < Object

static VALUE
ip_init(argc, argv, self)
    int   argc;
    VALUE *argv;
    VALUE self;
{
    struct tcltkip *ptr;        /* tcltkip data struct */
    VALUE argv0, opts;
    int cnt;
    int st;
    int with_tk = 1;
    Tk_Window mainWin = (Tk_Window)NULL;

    /* security check */
    if (rb_safe_level() >= 4) {
        rb_raise(rb_eSecurityError,
                 "Cannot create a TclTkIp object at level %d",
                 rb_safe_level());
    }

    /* create object */
    Data_Get_Struct(self, struct tcltkip, ptr);
    ptr = ALLOC(struct tcltkip);
    /* ptr = RbTk_ALLOC_N(struct tcltkip, 1); */
    DATA_PTR(self) = ptr;
#ifdef RUBY_USE_NATIVE_THREAD
    ptr->tk_thread_id = 0;
#endif
    ptr->ref_count = 0;
    ptr->allow_ruby_exit = 1;
    ptr->return_value = 0;

    /* from Tk_Main() */
    DUMP1("Tcl_CreateInterp");
    ptr->ip = ruby_tcl_create_ip_and_stubs_init(&st);
    if (ptr->ip == NULL) {
        switch(st) {
        case TCLTK_STUBS_OK:
            break;
        case NO_TCL_DLL:
            rb_raise(rb_eLoadError, "tcltklib: fail to open tcl_dll");
        case NO_FindExecutable:
            rb_raise(rb_eLoadError, "tcltklib: can't find Tcl_FindExecutable");
        case NO_CreateInterp:
            rb_raise(rb_eLoadError, "tcltklib: can't find Tcl_CreateInterp()");
        case NO_DeleteInterp:
            rb_raise(rb_eLoadError, "tcltklib: can't find Tcl_DeleteInterp()");
        case FAIL_CreateInterp:
            rb_raise(rb_eRuntimeError, "tcltklib: fail to create a new IP");
        case FAIL_Tcl_InitStubs:
            rb_raise(rb_eRuntimeError, "tcltklib: fail to Tcl_InitStubs()");
        default:
            rb_raise(rb_eRuntimeError, "tcltklib: unknown error(%d) on ruby_tcl_create_ip_and_stubs_init", st);
        }
    }

#if TCL_MAJOR_VERSION >= 8
#if TCL_NAMESPACE_DEBUG
    DUMP1("get current namespace");
    if ((ptr->default_ns = Tcl_GetCurrentNamespace(ptr->ip))
        == (Tcl_Namespace*)NULL) {
      rb_raise(rb_eRuntimeError, "a new Tk interpreter has a NULL namespace");
    }
#endif
#endif

    rbtk_preserve_ip(ptr);
    DUMP2("IP ref_count = %d", ptr->ref_count);
    current_interp = ptr->ip;

    ptr->has_orig_exit
        = Tcl_GetCommandInfo(ptr->ip, "exit", &(ptr->orig_exit_info));

#if defined CREATE_RUBYTK_KIT || defined CREATE_RUBYKIT
    call_tclkit_init_script(current_interp);

# if 10 * TCL_MAJOR_VERSION + TCL_MINOR_VERSION > 84
    {
      Tcl_DString encodingName;
      Tcl_GetEncodingNameFromEnvironment(&encodingName);
      if (strcmp(Tcl_DStringValue(&encodingName), Tcl_GetEncodingName(NULL))) {
        /* fails, so we set a variable and do it in the boot.tcl script */
        Tcl_SetSystemEncoding(NULL, Tcl_DStringValue(&encodingName));
      }
      Tcl_SetVar(current_interp, "tclkit_system_encoding", Tcl_DStringValue(&encodingName), 0);
      Tcl_DStringFree(&encodingName);
    }
# endif
#endif

    /* set variables */
    Tcl_Eval(ptr->ip, "set argc 0; set argv {}; set argv0 tcltklib.so");

    cnt = rb_scan_args(argc, argv, "02", &argv0, &opts);
    switch(cnt) {
    case 2:
        /* options */
        if (NIL_P(opts) || opts == Qfalse) {
            /* without Tk */
            with_tk = 0;
        } else {
            /* Tcl_SetVar(ptr->ip, "argv", StringValuePtr(opts), 0); */
            Tcl_SetVar(ptr->ip, "argv", StringValuePtr(opts), TCL_GLOBAL_ONLY);
            Tcl_Eval(ptr->ip, "set argc [llength $argv]");
        }
    case 1:
        /* argv0 */
        if (!NIL_P(argv0)) {
            if (strncmp(StringValuePtr(argv0), "-e", 3) == 0
                || strncmp(StringValuePtr(argv0), "-", 2) == 0) {
                Tcl_SetVar(ptr->ip, "argv0", "ruby", TCL_GLOBAL_ONLY);
            } else {
                /* Tcl_SetVar(ptr->ip, "argv0", StringValuePtr(argv0), 0); */
                Tcl_SetVar(ptr->ip, "argv0", StringValuePtr(argv0),
                           TCL_GLOBAL_ONLY);
            }
        }
    case 0:
        /* no args */
        ;
    }

    /* from Tcl_AppInit() */
    DUMP1("Tcl_Init");
#if (defined CREATE_RUBYTK_KIT || defined CREATE_RUBYKIT) && (!defined KIT_LITE) && (10 * TCL_MAJOR_VERSION + TCL_MINOR_VERSION == 85)
    /*************************************************************************/
    /*  FIX ME (2010/06/28)                                                  */
    /*    Don't use ::chan command for Mk4tcl + tclvfs-1.4 on Tcl8.5.        */
    /*    It fails to access VFS files because of vfs::zstream.              */
    /*    So, force to use ::rechan by temporaly hiding ::chan.              */
    /*************************************************************************/
    Tcl_Eval(ptr->ip, "catch {rename ::chan ::_tmp_chan}");
    if (Tcl_Init(ptr->ip) == TCL_ERROR) {
        rb_raise(rb_eRuntimeError, "%s", Tcl_GetStringResult(ptr->ip));
    }
    Tcl_Eval(ptr->ip, "catch {rename ::_tmp_chan ::chan}");
#else
    if (Tcl_Init(ptr->ip) == TCL_ERROR) {
        rb_raise(rb_eRuntimeError, "%s", Tcl_GetStringResult(ptr->ip));
    }
#endif

    st = ruby_tcl_stubs_init();
    /* from Tcl_AppInit() */
    if (with_tk) {
        DUMP1("Tk_Init");
        st = ruby_tk_stubs_init(ptr->ip);
        switch(st) {
        case TCLTK_STUBS_OK:
            break;
        case NO_Tk_Init:
            rb_raise(rb_eLoadError, "tcltklib: can't find Tk_Init()");
        case FAIL_Tk_Init:
            rb_raise(rb_eRuntimeError, "tcltklib: fail to Tk_Init(). %s",
                     Tcl_GetStringResult(ptr->ip));
        case FAIL_Tk_InitStubs:
            rb_raise(rb_eRuntimeError, "tcltklib: fail to Tk_InitStubs(). %s",
                     Tcl_GetStringResult(ptr->ip));
        default:
            rb_raise(rb_eRuntimeError, "tcltklib: unknown error(%d) on ruby_tk_stubs_init", st);
        }

        DUMP1("Tcl_StaticPackage(\"Tk\")");
#if TCL_MAJOR_VERSION >= 8
        Tcl_StaticPackage(ptr->ip, "Tk", Tk_Init, Tk_SafeInit);
#else /* TCL_MAJOR_VERSION < 8 */
        Tcl_StaticPackage(ptr->ip, "Tk", Tk_Init,
                          (Tcl_PackageInitProc *) NULL);
#endif

#ifdef RUBY_USE_NATIVE_THREAD
        /* set Tk thread ID */
        ptr->tk_thread_id = Tcl_GetCurrentThread();
#endif
        /* get main window */
        mainWin = Tk_MainWindow(ptr->ip);
        Tk_Preserve((ClientData)mainWin);
    }

    /* add ruby command to the interpreter */
#if TCL_MAJOR_VERSION >= 8
    DUMP1("Tcl_CreateObjCommand(\"ruby\")");
    Tcl_CreateObjCommand(ptr->ip, "ruby", ip_ruby_eval, (ClientData)NULL,
                         (Tcl_CmdDeleteProc *)NULL);
    DUMP1("Tcl_CreateObjCommand(\"ruby_eval\")");
    Tcl_CreateObjCommand(ptr->ip, "ruby_eval", ip_ruby_eval, (ClientData)NULL,
                         (Tcl_CmdDeleteProc *)NULL);
    DUMP1("Tcl_CreateObjCommand(\"ruby_cmd\")");
    Tcl_CreateObjCommand(ptr->ip, "ruby_cmd", ip_ruby_cmd, (ClientData)NULL,
                         (Tcl_CmdDeleteProc *)NULL);
#else /* TCL_MAJOR_VERSION < 8 */
    DUMP1("Tcl_CreateCommand(\"ruby\")");
    Tcl_CreateCommand(ptr->ip, "ruby", ip_ruby_eval, (ClientData)NULL,
                      (Tcl_CmdDeleteProc *)NULL);
    DUMP1("Tcl_CreateCommand(\"ruby_eval\")");
    Tcl_CreateCommand(ptr->ip, "ruby_eval", ip_ruby_eval, (ClientData)NULL,
                      (Tcl_CmdDeleteProc *)NULL);
    DUMP1("Tcl_CreateCommand(\"ruby_cmd\")");
    Tcl_CreateCommand(ptr->ip, "ruby_cmd", ip_ruby_cmd, (ClientData)NULL,
                      (Tcl_CmdDeleteProc *)NULL);
#endif

    /* add 'interp_exit', 'ruby_exit' and replace 'exit' command */
#if TCL_MAJOR_VERSION >= 8
    DUMP1("Tcl_CreateObjCommand(\"interp_exit\")");
    Tcl_CreateObjCommand(ptr->ip, "interp_exit", ip_InterpExitObjCmd,
                         (ClientData)mainWin, (Tcl_CmdDeleteProc *)NULL);
    DUMP1("Tcl_CreateObjCommand(\"ruby_exit\")");
    Tcl_CreateObjCommand(ptr->ip, "ruby_exit", ip_RubyExitObjCmd,
                         (ClientData)mainWin, (Tcl_CmdDeleteProc *)NULL);
    DUMP1("Tcl_CreateObjCommand(\"exit\") --> \"ruby_exit\"");
    Tcl_CreateObjCommand(ptr->ip, "exit", ip_RubyExitObjCmd,
                         (ClientData)mainWin, (Tcl_CmdDeleteProc *)NULL);
#else /* TCL_MAJOR_VERSION < 8 */
    DUMP1("Tcl_CreateCommand(\"interp_exit\")");
    Tcl_CreateCommand(ptr->ip, "interp_exit", ip_InterpExitCommand,
                      (ClientData)mainWin, (Tcl_CmdDeleteProc *)NULL);
    DUMP1("Tcl_CreateCommand(\"ruby_exit\")");
    Tcl_CreateCommand(ptr->ip, "ruby_exit", ip_RubyExitCommand,
                      (ClientData)mainWin, (Tcl_CmdDeleteProc *)NULL);
    DUMP1("Tcl_CreateCommand(\"exit\") --> \"ruby_exit\"");
    Tcl_CreateCommand(ptr->ip, "exit", ip_RubyExitCommand,
                      (ClientData)mainWin, (Tcl_CmdDeleteProc *)NULL);
#endif

    /* replace vwait and tkwait */
    ip_replace_wait_commands(ptr->ip, mainWin);

    /* wrap namespace command */
    ip_wrap_namespace_command(ptr->ip);

    /* define command to replace commands which depend on slave's MainWindow */
#if TCL_MAJOR_VERSION >= 8
    Tcl_CreateObjCommand(ptr->ip, "__replace_slave_tk_commands__",
                         ip_rb_replaceSlaveTkCmdsObjCmd,
                         (ClientData)NULL, (Tcl_CmdDeleteProc *)NULL);
#else /* TCL_MAJOR_VERSION < 8 */
    Tcl_CreateCommand(ptr->ip, "__replace_slave_tk_commands__",
                      ip_rb_replaceSlaveTkCmdsCommand,
                      (ClientData)NULL, (Tcl_CmdDeleteProc *)NULL);
#endif

    /* set finalizer */
    Tcl_CallWhenDeleted(ptr->ip, ip_CallWhenDeleted, (ClientData)mainWin);

    if (mainWin != (Tk_Window)NULL) {
        Tk_Release((ClientData)mainWin);
    }

    return self;
}

# File ext/tk/lib/tk.rb, line 30
def initialize(*args)
  __initialize__(*args)

  @force_default_encoding ||= TkUtil.untrust([false])
  @encoding ||= TkUtil.untrust([nil])
  def @encoding.to_s; self.join(nil); end
end

static VALUE
ip_cancel_eval(argc, argv, self)
    int   argc;
    VALUE *argv;
    VALUE self;
{
    VALUE retval;

    if (rb_scan_args(argc, argv, "01", &retval) == 0) {
        retval = Qnil;
    }
    if (ip_cancel_eval_core(get_ip(self)->ip, retval, 0) == TCL_OK) {
      return Qtrue;
    } else {
      return Qfalse;
    }
}

static VALUE
ip_cancel_eval_unwind(argc, argv, self)
    int   argc;
    VALUE *argv;
    VALUE self;
{
    int flag = 0;
    VALUE retval;

    if (rb_scan_args(argc, argv, "01", &retval) == 0) {
        retval = Qnil;
    }

    flag |= TCL_CANCEL_UNWIND;
    if (ip_cancel_eval_core(get_ip(self)->ip, retval, flag) == TCL_OK) {
      return Qtrue;
    } else {
      return Qfalse;
    }
}

static VALUE
lib_conv_listelement(self, src)
    VALUE self;
    VALUE src;
{
    int   len, scan_flag;
    volatile VALUE dst;
    int   taint_flag = OBJ_TAINTED(src);
    int thr_crit_bup;

    tcl_stubs_check();

    thr_crit_bup = rb_thread_critical;
    rb_thread_critical = Qtrue;

    StringValue(src);

#if TCL_MAJOR_VERSION >= 8
    len = Tcl_ScanCountedElement(RSTRING_PTR(src), RSTRING_LENINT(src),
                                 &scan_flag);
    dst = rb_str_new(0, len + 1);
    len = Tcl_ConvertCountedElement(RSTRING_PTR(src), RSTRING_LENINT(src),
                                    RSTRING_PTR(dst), scan_flag);
#else /* TCL_MAJOR_VERSION < 8 */
    len = Tcl_ScanElement(RSTRING_PTR(src), &scan_flag);
    dst = rb_str_new(0, len + 1);
    len = Tcl_ConvertElement(RSTRING_PTR(src), RSTRING_PTR(dst), scan_flag);
#endif

    rb_str_resize(dst, len);
    if (taint_flag) RbTk_OBJ_UNTRUST(dst);

    rb_thread_critical = thr_crit_bup;

    return dst;
}

static VALUE
ip_create_console(self)
    VALUE self;
{
    struct tcltkip *ptr = get_ip(self);

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        rb_raise(rb_eRuntimeError, "interpreter is deleted");
    }

    return tk_funcall(ip_create_console_core, 0, (VALUE*)NULL, self);
}

# File ext/tk/sample/demos-en/tkencoding.rb, line 13
def _eval(cmd)
  if( @encoding )
    _fromUTF8(__eval(_toUTF8(cmd,@encoding)),@encoding)
  else
    __eval(cmd)
  end
end

static VALUE
ip_fromUTF8(argc, argv, self)
    int   argc;
    VALUE *argv;
    VALUE self;
{
    VALUE str, encodename;

    if (rb_scan_args(argc, argv, "11", &str, &encodename) == 1) {
        encodename = Qnil;
    }
    return lib_fromUTF8_core(self, str, encodename);
}

static VALUE
ip_get_global_var(self, varname)
    VALUE self;
    VALUE varname;
{
    return ip_get_variable(self, varname,
                           INT2FIX(TCL_GLOBAL_ONLY | TCL_LEAVE_ERR_MSG));
}

static VALUE
ip_get_global_var2(self, varname, index)
    VALUE self;
    VALUE varname;
    VALUE index;
{
    return ip_get_variable2(self, varname, index,
                            INT2FIX(TCL_GLOBAL_ONLY | TCL_LEAVE_ERR_MSG));
}

static VALUE
ip_get_variable(self, varname, flag)
    VALUE self;
    VALUE varname;
    VALUE flag;
{
    return ip_get_variable2(self, varname, Qnil, flag);
}

static VALUE
ip_get_variable2(self, varname, index, flag)
    VALUE self;
    VALUE varname;
    VALUE index;
    VALUE flag;
{
    VALUE argv[3];
    VALUE retval;

    StringValue(varname);
    if (!NIL_P(index)) StringValue(index);

    argv[0] = varname;
    argv[1] = index;
    argv[2] = flag;

    retval = tk_funcall(ip_get_variable2_core, 3, argv, self);

    if (NIL_P(retval)) {
        return rb_tainted_str_new2("");
    } else {
        return retval;
    }
}

static VALUE
ip_invoke_immediate(argc, argv, obj)
    int argc;
    VALUE *argv;
    VALUE obj;
{
    /* POTENTIALY INSECURE : can create infinite loop */
    rb_secure(4);
    return ip_invoke_with_position(argc, argv, obj, TCL_QUEUE_HEAD);
}

# File ext/tk/sample/demos-en/tkencoding.rb, line 21
def _invoke(*cmds)
  if( @encoding )
    cmds = cmds.collect{|cmd| _toUTF8(cmd,@encoding)}
    _fromUTF8(__invoke(*cmds),@encoding)
  else
    __invoke(*cmds)
  end
end

# File ext/tk/lib/tk.rb, line 22
def _ip_id_
  # for RemoteTkIp
  ''
end

static VALUE
ip_make_menu_embeddable(interp, menu_path)
    VALUE interp;
    VALUE menu_path;
{
    VALUE argv[1];

    argv[0] = menu_path;
    return tk_funcall(ip_make_menu_embeddable_core, 1, argv, interp);
}

static VALUE
lib_merge_tklist(argc, argv, obj)
    int argc;
    VALUE *argv;
    VALUE obj;
{
    int  num, len;
    int  *flagPtr;
    char *dst, *result;
    volatile VALUE str;
    int taint_flag = 0;
    int thr_crit_bup;
    VALUE old_gc;

    if (argc == 0) return rb_str_new2("");

    tcl_stubs_check();

    thr_crit_bup = rb_thread_critical;
    rb_thread_critical = Qtrue;
    old_gc = rb_gc_disable();

    /* based on Tcl/Tk's Tcl_Merge() */
    /* flagPtr = ALLOC_N(int, argc); */
    flagPtr = RbTk_ALLOC_N(int, argc);
#if 0 /* use Tcl_Preserve/Release */
    Tcl_Preserve((ClientData)flagPtr); /* XXXXXXXXXX */
#endif

    /* pass 1 */
    len = 1;
    for(num = 0; num < argc; num++) {
        if (OBJ_TAINTED(argv[num])) taint_flag = 1;
        dst = StringValuePtr(argv[num]);
#if TCL_MAJOR_VERSION >= 8
        len += Tcl_ScanCountedElement(dst, RSTRING_LENINT(argv[num]),
                                      &flagPtr[num]) + 1;
#else /* TCL_MAJOR_VERSION < 8 */
        len += Tcl_ScanElement(dst, &flagPtr[num]) + 1;
#endif
    }

    /* pass 2 */
    /* result = (char *)Tcl_Alloc(len); */
    result = (char *)ckalloc(len);
#if 0 /* use Tcl_Preserve/Release */
    Tcl_Preserve((ClientData)result);
#endif
    dst = result;
    for(num = 0; num < argc; num++) {
#if TCL_MAJOR_VERSION >= 8
        len = Tcl_ConvertCountedElement(RSTRING_PTR(argv[num]),
                                        RSTRING_LENINT(argv[num]),
                                        dst, flagPtr[num]);
#else /* TCL_MAJOR_VERSION < 8 */
        len = Tcl_ConvertElement(RSTRING_PTR(argv[num]), dst, flagPtr[num]);
#endif
        dst += len;
        *dst = ' ';
        dst++;
    }
    if (dst == result) {
        *dst = 0;
    } else {
        dst[-1] = 0;
    }

#if 0 /* use Tcl_EventuallyFree */
    Tcl_EventuallyFree((ClientData)flagPtr, TCL_DYNAMIC); /* XXXXXXXX */
#else
#if 0 /* use Tcl_Preserve/Release */
    Tcl_Release((ClientData)flagPtr);
#else
    /* free(flagPtr); */
    ckfree((char*)flagPtr);
#endif
#endif

    /* create object */
    str = rb_str_new(result, dst - result - 1);
    if (taint_flag) RbTk_OBJ_UNTRUST(str);
#if 0 /* use Tcl_EventuallyFree */
    Tcl_EventuallyFree((ClientData)result, TCL_DYNAMIC); /* XXXXXXXX */
#else
#if 0 /* use Tcl_Preserve/Release */
    Tcl_Release((ClientData)result); /* XXXXXXXXXXX */
#else
    /* Tcl_Free(result); */
    ckfree(result);
#endif
#endif

    if (old_gc == Qfalse) rb_gc_enable();
    rb_thread_critical = thr_crit_bup;

    return str;
}

static VALUE
ip_retval(self)
    VALUE self;
{
    struct tcltkip *ptr;        /* tcltkip data struct */

    /* get the data strcut */
    ptr = get_ip(self);

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        return rb_tainted_str_new2("");
    }

    return (INT2FIX(ptr->return_value));
}

static VALUE
ip_set_global_var(self, varname, value)
    VALUE self;
    VALUE varname;
    VALUE value;
{
    return ip_set_variable(self, varname, value,
                           INT2FIX(TCL_GLOBAL_ONLY | TCL_LEAVE_ERR_MSG));
}

static VALUE
ip_set_global_var2(self, varname, index, value)
    VALUE self;
    VALUE varname;
    VALUE index;
    VALUE value;
{
    return ip_set_variable2(self, varname, index, value,
                            INT2FIX(TCL_GLOBAL_ONLY | TCL_LEAVE_ERR_MSG));
}

static VALUE
ip_set_variable(self, varname, value, flag)
    VALUE self;
    VALUE varname;
    VALUE value;
    VALUE flag;
{
    return ip_set_variable2(self, varname, Qnil, value, flag);
}

static VALUE
ip_set_variable2(self, varname, index, value, flag)
    VALUE self;
    VALUE varname;
    VALUE index;
    VALUE value;
    VALUE flag;
{
    VALUE argv[4];
    VALUE retval;

    StringValue(varname);
    if (!NIL_P(index)) StringValue(index);
    StringValue(value);

    argv[0] = varname;
    argv[1] = index;
    argv[2] = value;
    argv[3] = flag;

    retval = tk_funcall(ip_set_variable2_core, 4, argv, self);

    if (NIL_P(retval)) {
        return rb_tainted_str_new2("");
    } else {
        return retval;
    }
}

static VALUE
ip_split_tklist(self, list_str)
    VALUE self;
    VALUE list_str;
{
    return lib_split_tklist_core(self, list_str);
}

static VALUE
ip_thread_tkwait(self, mode, target)
    VALUE self;
    VALUE mode;
    VALUE target;
{
    VALUE argv[3];
    volatile VALUE cmd_str = rb_str_new2("thread_tkwait");

    argv[0] = cmd_str;
    argv[1] = mode;
    argv[2] = target;

    return ip_invoke_with_position(3, argv, self, TCL_QUEUE_TAIL);
}

static VALUE
ip_thread_vwait(self, var)
    VALUE self;
    VALUE var;
{
    VALUE argv[2];
    volatile VALUE cmd_str = rb_str_new2("thread_vwait");

    argv[0] = cmd_str;
    argv[1] = var;

    return ip_invoke_with_position(2, argv, self, TCL_QUEUE_TAIL);
}

static VALUE
ip_toUTF8(argc, argv, self)
    int   argc;
    VALUE *argv;
    VALUE self;
{
    VALUE str, encodename;

    if (rb_scan_args(argc, argv, "11", &str, &encodename) == 1) {
        encodename = Qnil;
    }
    return lib_toUTF8_core(self, str, encodename);
}

static VALUE
ip_unset_global_var(self, varname)
    VALUE self;
    VALUE varname;
{
    return ip_unset_variable(self, varname,
                             INT2FIX(TCL_GLOBAL_ONLY | TCL_LEAVE_ERR_MSG));
}

static VALUE
ip_unset_global_var2(self, varname, index)
    VALUE self;
    VALUE varname;
    VALUE index;
{
    return ip_unset_variable2(self, varname, index,
                              INT2FIX(TCL_GLOBAL_ONLY | TCL_LEAVE_ERR_MSG));
}

static VALUE
ip_unset_variable(self, varname, flag)
    VALUE self;
    VALUE varname;
    VALUE flag;
{
    return ip_unset_variable2(self, varname, Qnil, flag);
}

static VALUE
ip_unset_variable2(self, varname, index, flag)
    VALUE self;
    VALUE varname;
    VALUE index;
    VALUE flag;
{
    VALUE argv[3];
    VALUE retval;

    StringValue(varname);
    if (!NIL_P(index)) StringValue(index);

    argv[0] = varname;
    argv[1] = index;
    argv[2] = flag;

    retval = tk_funcall(ip_unset_variable2_core, 3, argv, self);

    if (NIL_P(retval)) {
        return rb_tainted_str_new2("");
    } else {
        return retval;
    }
}

static VALUE
ip_allow_ruby_exit_set(self, val)
    VALUE self, val;
{
    struct tcltkip *ptr = get_ip(self);
    Tk_Window mainWin;

    rb_secure(4);

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        rb_raise(rb_eRuntimeError, "interpreter is deleted");
    }

    if (Tcl_IsSafe(ptr->ip)) {
        rb_raise(rb_eSecurityError,
                 "insecure operation on a safe interpreter");
    }

    /*
     *  Because of cross-threading, the following line may fail to find
     *  the MainWindow, even if the Tcl/Tk interpreter has one or more.
     *  But it has no problem. Current implementation of both type of
     *  the "exit" command don't need maiinWin token.
     */
    mainWin = (tk_stubs_init_p())? Tk_MainWindow(ptr->ip): (Tk_Window)NULL;

    if (RTEST(val)) {
        ptr->allow_ruby_exit = 1;
#if TCL_MAJOR_VERSION >= 8
        DUMP1("Tcl_CreateObjCommand(\"exit\") --> \"ruby_exit\"");
        Tcl_CreateObjCommand(ptr->ip, "exit", ip_RubyExitObjCmd,
                             (ClientData)mainWin, (Tcl_CmdDeleteProc *)NULL);
#else /* TCL_MAJOR_VERSION < 8 */
        DUMP1("Tcl_CreateCommand(\"exit\") --> \"ruby_exit\"");
        Tcl_CreateCommand(ptr->ip, "exit", ip_RubyExitCommand,
                          (ClientData)mainWin, (Tcl_CmdDeleteProc *)NULL);
#endif
        return Qtrue;

    } else {
        ptr->allow_ruby_exit = 0;
#if TCL_MAJOR_VERSION >= 8
        DUMP1("Tcl_CreateObjCommand(\"exit\") --> \"interp_exit\"");
        Tcl_CreateObjCommand(ptr->ip, "exit", ip_InterpExitObjCmd,
                             (ClientData)mainWin, (Tcl_CmdDeleteProc *)NULL);
#else /* TCL_MAJOR_VERSION < 8 */
        DUMP1("Tcl_CreateCommand(\"exit\") --> \"interp_exit\"");
        Tcl_CreateCommand(ptr->ip, "exit", ip_InterpExitCommand,
                          (ClientData)mainWin, (Tcl_CmdDeleteProc *)NULL);
#endif
        return Qfalse;
    }
}

static VALUE
ip_allow_ruby_exit_p(self)
    VALUE self;
{
    struct tcltkip *ptr = get_ip(self);

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        rb_raise(rb_eRuntimeError, "interpreter is deleted");
    }

    if (ptr->allow_ruby_exit) {
        return Qtrue;
    } else {
        return Qfalse;
    }
}

static VALUE
create_dummy_encoding_for_tk(interp, name)
     VALUE interp;
     VALUE name;
{
  return create_dummy_encoding_for_tk_core(interp, name, Qtrue);
}

static VALUE
ip_create_slave(argc, argv, self)
    int   argc;
    VALUE *argv;
    VALUE self;
{
    struct tcltkip *master = get_ip(self);
    VALUE safemode;
    VALUE name;
    VALUE callargv[2];

    /* ip is deleted? */
    if (deleted_ip(master)) {
        rb_raise(rb_eRuntimeError,
                 "deleted master cannot create a new slave interpreter");
    }

    /* argument check */
    if (rb_scan_args(argc, argv, "11", &name, &safemode) == 1) {
        safemode = Qfalse;
    }
    if (Tcl_IsSafe(master->ip) != 1
        && (safemode == Qfalse || NIL_P(safemode))) {
        rb_secure(4);
    }

    StringValue(name);
    callargv[0] = name;
    callargv[1] = safemode;

    return tk_funcall(ip_create_slave_core, 2, callargv, self);
}

static VALUE
ip_delete(self)
    VALUE self;
{
    int  thr_crit_bup;
    struct tcltkip *ptr = get_ip(self);

    /* if (ptr == (struct tcltkip *)NULL || ptr->ip == (Tcl_Interp*)NULL) { */
    if (deleted_ip(ptr)) {
        DUMP1("delete deleted IP");
        return Qnil;
    }

    thr_crit_bup = rb_thread_critical;
    rb_thread_critical = Qtrue;

    DUMP1("delete interp");
    if (!Tcl_InterpDeleted(ptr->ip)) {
      DUMP1("call ip_finalize");
      ip_finalize(ptr->ip);

      Tcl_DeleteInterp(ptr->ip);
      Tcl_Release(ptr->ip);
    }

    rb_thread_critical = thr_crit_bup;

    return Qnil;
}

static VALUE
ip_is_deleted_p(self)
    VALUE self;
{
    struct tcltkip *ptr = get_ip(self);

    if (deleted_ip(ptr)) {
        return Qtrue;
    } else {
        return Qfalse;
    }
}

static VALUE
ip_do_one_event(argc, argv, self)
    int   argc;
    VALUE *argv;
    VALUE self;
{
    return lib_do_one_event_core(argc, argv, self, 0);
}

static VALUE
ip_get_encoding_table(interp)
     VALUE interp;
{
  volatile VALUE table = Qnil;

  table = rb_ivar_get(interp, ID_encoding_table);

  if (NIL_P(table)) {
    /* initialize encoding_table */
    table = create_encoding_table(interp);
    rb_define_singleton_method(table, "get_name", encoding_table_get_name, 1);
    rb_define_singleton_method(table, "get_obj",  encoding_table_get_obj,  1);
  }

  return table;
}

static VALUE
ip_get_eventloop_tick(self)
    VALUE self;
{
    return get_eventloop_tick(self);
}

static VALUE
ip_get_eventloop_weight(self)
    VALUE self;
{
    return get_eventloop_weight(self);
}

static VALUE
ip_get_no_event_wait(self)
    VALUE self;
{
    return get_no_event_wait(self);
}

static VALUE
ip_has_mainwindow_p(self)
    VALUE self;
{
    return tk_funcall(ip_has_mainwindow_p_core, 0, (VALUE*)NULL, self);
}

static VALUE
ip_has_invalid_namespace_p(self)
    VALUE self;
{
    struct tcltkip *ptr = get_ip(self);

    if (ptr == (struct tcltkip *)NULL || ptr->ip == (Tcl_Interp *)NULL) {
        /* deleted IP */
        return Qtrue;
    }

#if TCL_NAMESPACE_DEBUG
    if (rbtk_invalid_namespace(ptr)) {
        return Qtrue;
    } else {
        return Qfalse;
    }
#else
    return Qfalse;
#endif
}

static VALUE
ip_mainloop(argc, argv, self)
    int   argc;
    VALUE *argv;
    VALUE self;
{
    volatile VALUE ret;
    struct tcltkip *ptr = get_ip(self);

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        return Qnil;
    }

    if (Tcl_GetMaster(ptr->ip) != (Tcl_Interp*)NULL) {
        /* slave IP */
        return Qnil;
    }

    eventloop_interp = ptr->ip;
    ret = lib_mainloop(argc, argv, self);
    eventloop_interp = (Tcl_Interp*)NULL;
    return ret;
}

static VALUE
ip_evloop_abort_on_exc(self)
    VALUE self;
{
    return lib_evloop_abort_on_exc(self);
}

static VALUE
ip_evloop_abort_on_exc_set(self, val)
    VALUE self, val;
{
    struct tcltkip *ptr = get_ip(self);

    rb_secure(4);

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        return lib_evloop_abort_on_exc(self);
    }

    if (Tcl_GetMaster(ptr->ip) != (Tcl_Interp*)NULL) {
        /* slave IP */
        return lib_evloop_abort_on_exc(self);
    }
    return lib_evloop_abort_on_exc_set(self, val);
}

static VALUE
ip_mainloop_watchdog(argc, argv, self)
    int   argc;
    VALUE *argv;
    VALUE self;
{
    struct tcltkip *ptr = get_ip(self);

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        return Qnil;
    }

    if (Tcl_GetMaster(ptr->ip) != (Tcl_Interp*)NULL) {
        /* slave IP */
        return Qnil;
    }
    return lib_mainloop_watchdog(argc, argv, self);
}

static VALUE
ip_make_safe(self)
    VALUE self;
{
    struct tcltkip *ptr = get_ip(self);

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        rb_raise(rb_eRuntimeError, "interpreter is deleted");
    }

    return tk_funcall(ip_make_safe_core, 0, (VALUE*)NULL, self);
}

# File ext/tk/lib/multi-tk.rb, line 27
def new(*args)
  if Thread.current.group != ThreadGroup::Default
    raise SecurityError, 'only ThreadGroup::Default can call TclTkIp.new'
  end
  obj = __new__(*args)
  obj.instance_eval{
    @force_default_encoding ||= TkUtil.untrust([false])
    @encoding ||= TkUtil.untrust([nil])
    def @encoding.to_s; self.join(nil); end
  }
  obj
end

static VALUE
ip_restart(self)
    VALUE self;
{
    struct tcltkip *ptr = get_ip(self);

    rb_secure(4);

    tcl_stubs_check();

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        rb_raise(rb_eRuntimeError, "interpreter is deleted");
    }

    if (Tcl_GetMaster(ptr->ip) != (Tcl_Interp*)NULL) {
        /* slave IP */
        return Qnil;
    }
    return lib_restart(self);
}

static VALUE
ip_is_safe_p(self)
    VALUE self;
{
    struct tcltkip *ptr = get_ip(self);

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        rb_raise(rb_eRuntimeError, "interpreter is deleted");
    }

    if (Tcl_IsSafe(ptr->ip)) {
        return Qtrue;
    } else {
        return Qfalse;
    }
}

static VALUE
ip_set_eventloop_tick(self, tick)
    VALUE self;
    VALUE tick;
{
    struct tcltkip *ptr = get_ip(self);

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        return get_eventloop_tick(self);
    }

    if (Tcl_GetMaster(ptr->ip) != (Tcl_Interp*)NULL) {
        /* slave IP */
        return get_eventloop_tick(self);
    }
    return set_eventloop_tick(self, tick);
}

static VALUE
ip_set_eventloop_weight(self, loop_max, no_event)
    VALUE self;
    VALUE loop_max;
    VALUE no_event;
{
    struct tcltkip *ptr = get_ip(self);

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        return get_eventloop_weight(self);
    }

    if (Tcl_GetMaster(ptr->ip) != (Tcl_Interp*)NULL) {
        /* slave IP */
        return get_eventloop_weight(self);
    }
    return set_eventloop_weight(self, loop_max, no_event);
}

static VALUE
set_max_block_time(self, time)
    VALUE self;
    VALUE time;
{
    struct Tcl_Time tcl_time;
    VALUE divmod;

    switch(TYPE(time)) {
    case T_FIXNUM:
    case T_BIGNUM:
        /* time is micro-second value */
        divmod = rb_funcall(time, rb_intern("divmod"), 1, LONG2NUM(1000000));
        tcl_time.sec  = NUM2LONG(RARRAY_PTR(divmod)[0]);
        tcl_time.usec = NUM2LONG(RARRAY_PTR(divmod)[1]);
        break;

    case T_FLOAT:
        /* time is second value */
        divmod = rb_funcall(time, rb_intern("divmod"), 1, INT2FIX(1));
        tcl_time.sec  = NUM2LONG(RARRAY_PTR(divmod)[0]);
        tcl_time.usec = (long)(NUM2DBL(RARRAY_PTR(divmod)[1]) * 1000000);

    default:
        {
            VALUE tmp = rb_funcall(time, ID_inspect, 0, 0);
            rb_raise(rb_eArgError, "invalid value for time: '%s'",
                     StringValuePtr(tmp));
        }
    }

    Tcl_SetMaxBlockTime(&tcl_time);

    return Qnil;
}

static VALUE
ip_set_no_event_wait(self, wait)
    VALUE self;
    VALUE wait;
{
    struct tcltkip *ptr = get_ip(self);

    /* ip is deleted? */
    if (deleted_ip(ptr)) {
        return get_no_event_wait(self);
    }

    if (Tcl_GetMaster(ptr->ip) != (Tcl_Interp*)NULL) {
        /* slave IP */
        return get_no_event_wait(self);
    }
    return set_no_event_wait(self, wait);
}

static VALUE
ip_is_slave_of_p(self, master)
    VALUE self, master;
{
    if (!rb_obj_is_kind_of(master, tcltkip_class)) {
        rb_raise(rb_eArgError, "expected TclTkIp object");
    }

    if (Tcl_GetMaster(get_ip(self)->ip) == get_ip(master)->ip) {
      return Qtrue;
    } else {
      return Qfalse;
    }
}