diff -r 463b4fa9f067 -r 6a6d2ef151e6 libgaim/plugins/tcl/tcl_signals.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgaim/plugins/tcl/tcl_signals.c	Sun Apr 15 02:10:37 2007 +0000
@@ -0,0 +1,396 @@
+/**
+ * @file tcl_signals.c Gaim Tcl signal API
+ *
+ * gaim
+ *
+ * Copyright (C) 2003 Ethan Blanton <eblanton@cs.purdue.edu>
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include <tcl.h>
+#include <stdarg.h>
+
+#include "tcl_gaim.h"
+
+#include "internal.h"
+#include "connection.h"
+#include "conversation.h"
+#include "signals.h"
+#include "debug.h"
+#include "value.h"
+#include "core.h"
+
+static GList *tcl_callbacks;
+
+static void *tcl_signal_callback(va_list args, struct tcl_signal_handler *handler);
+static Tcl_Obj *new_cb_namespace (void);
+
+void tcl_signal_init()
+{
+	tcl_callbacks = NULL;
+}
+
+void tcl_signal_handler_free(struct tcl_signal_handler *handler)
+{
+	if (handler == NULL)
+		return;
+
+	Tcl_DecrRefCount(handler->signal);
+	if (handler->namespace)
+		Tcl_DecrRefCount(handler->namespace);
+	g_free(handler);
+}
+
+void tcl_signal_cleanup(Tcl_Interp *interp)
+{
+	GList *cur;
+	struct tcl_signal_handler *handler;
+
+	for (cur = tcl_callbacks; cur != NULL; cur = g_list_next(cur)) {
+		handler = cur->data;
+		if (handler->interp == interp) {
+			tcl_signal_handler_free(handler);
+			cur->data = NULL;
+		}
+	}
+	tcl_callbacks = g_list_remove_all(tcl_callbacks, NULL);
+}
+
+gboolean tcl_signal_connect(struct tcl_signal_handler *handler)
+{
+	GString *proc;
+
+	gaim_signal_get_values(handler->instance,
+			       Tcl_GetString(handler->signal),
+			       &handler->returntype, &handler->nargs,
+			       &handler->argtypes);
+
+	tcl_signal_disconnect(handler->interp, Tcl_GetString(handler->signal),
+			      handler->interp);
+
+	if (!gaim_signal_connect_vargs(handler->instance,
+				       Tcl_GetString(handler->signal),
+				       (void *)handler->interp,
+				       GAIM_CALLBACK(tcl_signal_callback),
+				       (void *)handler))
+		return FALSE;
+
+	handler->namespace = new_cb_namespace ();
+	Tcl_IncrRefCount(handler->namespace);
+	proc = g_string_new("");
+	g_string_append_printf(proc, "namespace eval %s { proc cb { %s } { %s } }",
+			       Tcl_GetString(handler->namespace),
+			       Tcl_GetString(handler->args),
+	                       Tcl_GetString(handler->proc));
+	if (Tcl_Eval(handler->interp, proc->str) != TCL_OK) {
+		Tcl_DecrRefCount(handler->namespace);
+		g_string_free(proc, TRUE);
+		return FALSE;
+	}
+	g_string_free(proc, TRUE);
+
+	tcl_callbacks = g_list_append(tcl_callbacks, (gpointer)handler);
+
+	return TRUE;
+}
+
+void tcl_signal_disconnect(void *instance, const char *signal, Tcl_Interp *interp)
+{
+	GList *cur;
+	struct tcl_signal_handler *handler;
+	gboolean found = FALSE;
+	GString *cmd;
+
+	for (cur = tcl_callbacks; cur != NULL; cur = g_list_next(cur)) {
+		handler = cur->data;
+		if (handler->interp == interp && handler->instance == instance 
+		    && !strcmp(signal, Tcl_GetString(handler->signal))) {
+			gaim_signal_disconnect(instance, signal, handler->interp,
+					       GAIM_CALLBACK(tcl_signal_callback));
+			cmd = g_string_sized_new(64);
+			g_string_printf(cmd, "namespace delete %s",
+					Tcl_GetString(handler->namespace));
+			Tcl_EvalEx(interp, cmd->str, -1, TCL_EVAL_GLOBAL);
+			tcl_signal_handler_free(handler);
+			g_string_free(cmd, TRUE);
+			cur->data = NULL;
+			found = TRUE;
+			break;
+		}
+	}
+	if (found)
+		tcl_callbacks = g_list_remove_all(tcl_callbacks, NULL);
+}
+
+static GaimStringref *ref_type(GaimSubType type)
+{
+	switch (type) {
+	case GAIM_SUBTYPE_ACCOUNT:
+		return GaimTclRefAccount;
+	case GAIM_SUBTYPE_CONNECTION:
+		return GaimTclRefConnection;
+	case GAIM_SUBTYPE_CONVERSATION:
+		return GaimTclRefConversation;
+	case GAIM_SUBTYPE_PLUGIN:
+		return GaimTclRefPlugin;
+	case GAIM_SUBTYPE_STATUS:
+		return GaimTclRefStatus;
+	case GAIM_SUBTYPE_XFER:
+		return GaimTclRefXfer;
+	default:
+		return NULL;
+	}
+}
+
+static void *tcl_signal_callback(va_list args, struct tcl_signal_handler *handler)
+{
+	GString *name, *val;
+	GaimBlistNode *node;
+	int error, i;
+	void *retval = NULL;
+	Tcl_Obj *cmd, *arg, *result;
+	void **vals; /* Used for inout parameters */
+	char ***strs;
+
+	vals = g_new0(void *, handler->nargs);
+	strs = g_new0(char **, handler->nargs);
+	name = g_string_sized_new(32);
+	val = g_string_sized_new(32);
+
+	cmd = Tcl_NewListObj(0, NULL);
+	Tcl_IncrRefCount(cmd);
+
+	arg = Tcl_DuplicateObj(handler->namespace);
+	Tcl_AppendStringsToObj(arg, "::cb", NULL);
+	Tcl_ListObjAppendElement(handler->interp, cmd, arg);
+
+	for (i = 0; i < handler->nargs; i++) {
+		if (gaim_value_is_outgoing(handler->argtypes[i]))
+			g_string_printf(name, "%s::arg%d",
+					Tcl_GetString(handler->namespace), i);
+
+		switch(gaim_value_get_type(handler->argtypes[i])) {
+		case GAIM_TYPE_UNKNOWN:	/* What?  I guess just pass the word ... */
+			/* treat this as a pointer, but complain first */
+			gaim_debug(GAIM_DEBUG_ERROR, "tcl", "unknown GaimValue type %d\n",
+				   gaim_value_get_type(handler->argtypes[i]));
+		case GAIM_TYPE_POINTER:
+		case GAIM_TYPE_OBJECT:
+		case GAIM_TYPE_BOXED:
+			/* These are all "pointer" types to us */
+			if (gaim_value_is_outgoing(handler->argtypes[i]))
+				gaim_debug_error("tcl", "pointer types do not currently support outgoing arguments\n");
+			arg = gaim_tcl_ref_new(GaimTclRefPointer, va_arg(args, void *));
+			break;
+		case GAIM_TYPE_BOOLEAN:
+			if (gaim_value_is_outgoing(handler->argtypes[i])) {
+				vals[i] = va_arg(args, gboolean *);
+				Tcl_LinkVar(handler->interp, name->str,
+					    (char *)&vals[i], TCL_LINK_BOOLEAN);
+				arg = Tcl_NewStringObj(name->str, -1);
+			} else {
+				arg = Tcl_NewBooleanObj(va_arg(args, gboolean));
+			}
+			break;
+		case GAIM_TYPE_CHAR:
+		case GAIM_TYPE_UCHAR:
+		case GAIM_TYPE_SHORT:
+		case GAIM_TYPE_USHORT:
+		case GAIM_TYPE_INT:
+		case GAIM_TYPE_UINT:
+		case GAIM_TYPE_LONG:
+		case GAIM_TYPE_ULONG:
+		case GAIM_TYPE_ENUM:
+			/* I should really cast these individually to
+			 * preserve as much information as possible ...
+			 * but heh */
+			if (gaim_value_is_outgoing(handler->argtypes[i])) {
+				vals[i] = va_arg(args, int *);
+				Tcl_LinkVar(handler->interp, name->str,
+					    vals[i], TCL_LINK_INT);
+				arg = Tcl_NewStringObj(name->str, -1);
+			} else {
+				arg = Tcl_NewIntObj(va_arg(args, int));
+			}
+			break;
+		case GAIM_TYPE_INT64:
+		case GAIM_TYPE_UINT64:
+			/* Tcl < 8.4 doesn't have wide ints, so we have ugly
+			 * ifdefs in here */
+			if (gaim_value_is_outgoing(handler->argtypes[i])) {
+				vals[i] = (void *)va_arg(args, gint64 *);
+				#if (TCL_MAJOR_VERSION >= 8 && TCL_MINOR_VERSION >= 4)
+				Tcl_LinkVar(handler->interp, name->str,
+					    vals[i], TCL_LINK_WIDE_INT);
+				#else
+				/* This is going to cause weirdness at best,
+				 * but what do you want ... we're losing
+				 * precision */
+				Tcl_LinkVar(handler->interp, name->str,
+					    vals[i], TCL_LINK_INT);
+				#endif /* Tcl >= 8.4 */
+				arg = Tcl_NewStringObj(name->str, -1);
+			} else {
+				#if (TCL_MAJOR_VERSION >= 8 && TCL_MINOR_VERSION >= 4)
+				arg = Tcl_NewWideIntObj(va_arg(args, gint64));
+				#else
+				arg = Tcl_NewIntObj((int)va_arg(args, int));
+				#endif /* Tcl >= 8.4 */
+			}
+			break;
+		case GAIM_TYPE_STRING:
+			if (gaim_value_is_outgoing(handler->argtypes[i])) {
+				strs[i] = va_arg(args, char **);
+				if (strs[i] == NULL || *strs[i] == NULL) {
+					vals[i] = ckalloc(1);
+					*(char *)vals[i] = '\0';
+				} else {
+					vals[i] = ckalloc(strlen(*strs[i]) + 1);
+					strcpy(vals[i], *strs[i]);
+				}
+				Tcl_LinkVar(handler->interp, name->str,
+					    (char *)&vals[i], TCL_LINK_STRING);
+				arg = Tcl_NewStringObj(name->str, -1);
+			} else {
+				arg = Tcl_NewStringObj(va_arg(args, char *), -1);
+			}
+			break;
+		case GAIM_TYPE_SUBTYPE:
+			switch (gaim_value_get_subtype(handler->argtypes[i])) {
+			case GAIM_SUBTYPE_UNKNOWN:
+				gaim_debug(GAIM_DEBUG_ERROR, "tcl", "subtype unknown\n");
+			case GAIM_SUBTYPE_ACCOUNT:
+			case GAIM_SUBTYPE_CONNECTION:
+			case GAIM_SUBTYPE_CONVERSATION:
+			case GAIM_SUBTYPE_STATUS:
+			case GAIM_SUBTYPE_PLUGIN:
+			case GAIM_SUBTYPE_XFER:
+				if (gaim_value_is_outgoing(handler->argtypes[i]))
+					gaim_debug_error("tcl", "pointer subtypes do not currently support outgoing arguments\n");
+				arg = gaim_tcl_ref_new(ref_type(gaim_value_get_subtype(handler->argtypes[i])), va_arg(args, void *));
+				break;
+			case GAIM_SUBTYPE_BLIST:
+			case GAIM_SUBTYPE_BLIST_BUDDY:
+			case GAIM_SUBTYPE_BLIST_GROUP:
+			case GAIM_SUBTYPE_BLIST_CHAT:
+				/* We're going to switch again for code-deduping */
+				if (gaim_value_is_outgoing(handler->argtypes[i]))
+					node = *va_arg(args, GaimBlistNode **);
+				else
+					node = va_arg(args, GaimBlistNode *);
+				switch (node->type) {
+				case GAIM_BLIST_GROUP_NODE:
+					arg = Tcl_NewListObj(0, NULL);
+					Tcl_ListObjAppendElement(handler->interp, arg,
+								 Tcl_NewStringObj("group", -1));
+					Tcl_ListObjAppendElement(handler->interp, arg,
+								 Tcl_NewStringObj(((GaimGroup *)node)->name, -1));
+					break;
+				case GAIM_BLIST_CONTACT_NODE:
+					/* g_string_printf(val, "contact {%s}", Contact Name? ); */
+					arg = Tcl_NewStringObj("contact", -1);
+					break;
+				case GAIM_BLIST_BUDDY_NODE:
+					arg = Tcl_NewListObj(0, NULL);
+					Tcl_ListObjAppendElement(handler->interp, arg,
+								 Tcl_NewStringObj("buddy", -1));
+					Tcl_ListObjAppendElement(handler->interp, arg,
+								 Tcl_NewStringObj(((GaimBuddy *)node)->name, -1));
+					Tcl_ListObjAppendElement(handler->interp, arg,
+								 gaim_tcl_ref_new(GaimTclRefAccount,
+										  ((GaimBuddy *)node)->account));
+					break;
+				case GAIM_BLIST_CHAT_NODE:
+					arg = Tcl_NewListObj(0, NULL);
+					Tcl_ListObjAppendElement(handler->interp, arg,
+								 Tcl_NewStringObj("chat", -1));
+					Tcl_ListObjAppendElement(handler->interp, arg,
+								 Tcl_NewStringObj(((GaimChat *)node)->alias, -1));
+					Tcl_ListObjAppendElement(handler->interp, arg,
+								 gaim_tcl_ref_new(GaimTclRefAccount,
+										  ((GaimChat *)node)->account));
+					break;
+				case GAIM_BLIST_OTHER_NODE:
+					arg = Tcl_NewStringObj("other", -1);
+					break;
+				}
+				break;
+			}
+		}
+		Tcl_ListObjAppendElement(handler->interp, cmd, arg);
+	}
+
+	/* Call the friggin' procedure already */
+	if ((error = Tcl_EvalObjEx(handler->interp, cmd, TCL_EVAL_GLOBAL)) != TCL_OK) {
+		gaim_debug(GAIM_DEBUG_ERROR, "tcl", "error evaluating callback: %s\n",
+			   Tcl_GetString(Tcl_GetObjResult(handler->interp)));
+	} else {
+		result = Tcl_GetObjResult(handler->interp);
+		/* handle return values -- strings and words only */
+		if (handler->returntype) {
+			if (gaim_value_get_type(handler->returntype) == GAIM_TYPE_STRING) {
+				retval = (void *)g_strdup(Tcl_GetString(result));
+			} else {
+				if ((error = Tcl_GetIntFromObj(handler->interp, result, (int *)&retval)) != TCL_OK) {
+					gaim_debug(GAIM_DEBUG_ERROR, "tcl", "Error retrieving procedure result: %s\n",
+						   Tcl_GetString(Tcl_GetObjResult(handler->interp)));
+					retval = NULL;
+				}
+			}
+		}
+	}
+
+	/* And finally clean up */
+	for (i = 0; i < handler->nargs; i++) {
+		g_string_printf(name, "%s::arg%d",
+				Tcl_GetString(handler->namespace), i);
+		if (gaim_value_is_outgoing(handler->argtypes[i])
+		    && gaim_value_get_type(handler->argtypes[i]) != GAIM_TYPE_SUBTYPE)
+			Tcl_UnlinkVar(handler->interp, name->str);
+
+		/* We basically only have to deal with strings on the
+		 * way out */
+		switch (gaim_value_get_type(handler->argtypes[i])) {
+		case GAIM_TYPE_STRING:
+			if (gaim_value_is_outgoing(handler->argtypes[i])) {
+				if (vals[i] != NULL && *(char **)vals[i] != NULL) {
+					g_free(*strs[i]);
+					*strs[i] = g_strdup(vals[i]);
+				}
+				ckfree(vals[i]);
+			}
+			break;
+		default:
+			/* nothing */
+			;
+		}
+	}
+
+	g_string_free(name, TRUE);
+	g_string_free(val, TRUE);
+	g_free(vals);
+	g_free(strs);
+
+	return retval;
+}
+
+static Tcl_Obj *new_cb_namespace ()
+{
+	static int cbnum;
+	char name[32];
+
+	g_snprintf (name, sizeof(name), "::gaim::_callback::cb_%d", cbnum++);
+	return Tcl_NewStringObj (name, -1);
+}