* @file tcl_signals.c Purple Tcl signal API * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA #include "conversation.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_handler_free(struct tcl_signal_handler *handler) Tcl_DecrRefCount(handler->signal); Tcl_DecrRefCount(handler->namespace); void tcl_signal_cleanup(Tcl_Interp *interp) struct tcl_signal_handler *handler; for (cur = tcl_callbacks; cur != NULL; cur = g_list_next(cur)) { if (handler->interp == interp) { tcl_signal_handler_free(handler); tcl_callbacks = g_list_remove_all(tcl_callbacks, NULL); gboolean tcl_signal_connect(struct tcl_signal_handler *handler) purple_signal_get_values(handler->instance, Tcl_GetString(handler->signal), &handler->returntype, &handler->nargs, tcl_signal_disconnect(handler->interp, Tcl_GetString(handler->signal), if (!purple_signal_connect_vargs(handler->instance, Tcl_GetString(handler->signal), PURPLE_CALLBACK(tcl_signal_callback), handler->namespace = new_cb_namespace (); Tcl_IncrRefCount(handler->namespace); 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); g_string_free(proc, TRUE); tcl_callbacks = g_list_append(tcl_callbacks, (gpointer)handler); void tcl_signal_disconnect(void *instance, const char *signal, Tcl_Interp *interp) struct tcl_signal_handler *handler; for (cur = tcl_callbacks; cur != NULL; cur = g_list_next(cur)) { if (handler->interp == interp && handler->instance == instance && !strcmp(signal, Tcl_GetString(handler->signal))) { purple_signal_disconnect(instance, signal, handler->interp, PURPLE_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); tcl_callbacks = g_list_remove_all(tcl_callbacks, NULL); static PurpleStringref *ref_type(PurpleSubType type) case PURPLE_SUBTYPE_ACCOUNT: return PurpleTclRefAccount; case PURPLE_SUBTYPE_CONNECTION: return PurpleTclRefConnection; case PURPLE_SUBTYPE_CONVERSATION: return PurpleTclRefConversation; case PURPLE_SUBTYPE_PLUGIN: return PurpleTclRefPlugin; case PURPLE_SUBTYPE_STATUS: return PurpleTclRefStatus; case PURPLE_SUBTYPE_XFER: static void *tcl_signal_callback(va_list args, struct tcl_signal_handler *handler) Tcl_Obj *cmd, *arg, *result; void **vals; /* Used for inout parameters */ 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); arg = Tcl_DuplicateObj(handler->namespace); Tcl_AppendStringsToObj(arg, "::cb", NULL); Tcl_ListObjAppendElement(handler->interp, cmd, arg); for (i = 0; i < handler->nargs; i++) { if (purple_value_is_outgoing(handler->argtypes[i])) g_string_printf(name, "%s::arg%d", Tcl_GetString(handler->namespace), i); switch(purple_value_get_type(handler->argtypes[i])) { case PURPLE_TYPE_UNKNOWN: /* What? I guess just pass the word ... */ /* treat this as a pointer, but complain first */ purple_debug(PURPLE_DEBUG_ERROR, "tcl", "unknown PurpleValue type %d\n", purple_value_get_type(handler->argtypes[i])); case PURPLE_TYPE_POINTER: /* These are all "pointer" types to us */ if (purple_value_is_outgoing(handler->argtypes[i])) purple_debug_error("tcl", "pointer types do not currently support outgoing arguments\n"); arg = purple_tcl_ref_new(PurpleTclRefPointer, va_arg(args, void *)); case PURPLE_TYPE_BOOLEAN: if (purple_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); arg = Tcl_NewBooleanObj(va_arg(args, gboolean)); /* I should really cast these individually to * preserve as much information as possible ... if (purple_value_is_outgoing(handler->argtypes[i])) { vals[i] = va_arg(args, int *); Tcl_LinkVar(handler->interp, name->str, arg = Tcl_NewStringObj(name->str, -1); arg = Tcl_NewIntObj(va_arg(args, int)); /* Tcl < 8.4 doesn't have wide ints, so we have ugly if (purple_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); /* This is going to cause weirdness at best, * but what do you want ... we're losing Tcl_LinkVar(handler->interp, name->str, arg = Tcl_NewStringObj(name->str, -1); #if (TCL_MAJOR_VERSION >= 8 && TCL_MINOR_VERSION >= 4) arg = Tcl_NewWideIntObj(va_arg(args, gint64)); arg = Tcl_NewIntObj((int)va_arg(args, int)); if (purple_value_is_outgoing(handler->argtypes[i])) { strs[i] = va_arg(args, char **); if (strs[i] == NULL || *strs[i] == NULL) { size_t len = strlen(*strs[i]) + 1; g_strlcpy(vals[i], *strs[i], len); Tcl_LinkVar(handler->interp, name->str, (char *)&vals[i], TCL_LINK_STRING); arg = Tcl_NewStringObj(name->str, -1); arg = Tcl_NewStringObj(va_arg(args, char *), -1); case PURPLE_TYPE_SUBTYPE: switch (purple_value_get_subtype(handler->argtypes[i])) { case PURPLE_SUBTYPE_UNKNOWN: purple_debug(PURPLE_DEBUG_ERROR, "tcl", "subtype unknown\n"); case PURPLE_SUBTYPE_ACCOUNT: case PURPLE_SUBTYPE_CONNECTION: case PURPLE_SUBTYPE_CONVERSATION: case PURPLE_SUBTYPE_STATUS: case PURPLE_SUBTYPE_PLUGIN: case PURPLE_SUBTYPE_XFER: if (purple_value_is_outgoing(handler->argtypes[i])) purple_debug_error("tcl", "pointer subtypes do not currently support outgoing arguments\n"); arg = purple_tcl_ref_new(ref_type(purple_value_get_subtype(handler->argtypes[i])), va_arg(args, void *)); case PURPLE_SUBTYPE_BLIST: case PURPLE_SUBTYPE_BLIST_BUDDY: case PURPLE_SUBTYPE_BLIST_GROUP: case PURPLE_SUBTYPE_BLIST_CHAT: /* We're going to switch again for code-deduping */ if (purple_value_is_outgoing(handler->argtypes[i])) node = *va_arg(args, PurpleBlistNode **); node = va_arg(args, PurpleBlistNode *); switch (purple_blist_node_get_type(node)) { case PURPLE_BLIST_GROUP_NODE: arg = Tcl_NewListObj(0, NULL); Tcl_ListObjAppendElement(handler->interp, arg, Tcl_NewStringObj("group", -1)); Tcl_ListObjAppendElement(handler->interp, arg, Tcl_NewStringObj(purple_group_get_name((PurpleGroup *)node), -1)); case PURPLE_BLIST_CONTACT_NODE: /* g_string_printf(val, "contact {%s}", Contact Name? ); */ arg = Tcl_NewStringObj("contact", -1); case PURPLE_BLIST_BUDDY_NODE: arg = Tcl_NewListObj(0, NULL); Tcl_ListObjAppendElement(handler->interp, arg, Tcl_NewStringObj("buddy", -1)); Tcl_ListObjAppendElement(handler->interp, arg, Tcl_NewStringObj(purple_buddy_get_name((PurpleBuddy *)node), -1)); Tcl_ListObjAppendElement(handler->interp, arg, purple_tcl_ref_new(PurpleTclRefAccount, purple_buddy_get_account((PurpleBuddy *)node))); case PURPLE_BLIST_CHAT_NODE: arg = Tcl_NewListObj(0, NULL); Tcl_ListObjAppendElement(handler->interp, arg, Tcl_NewStringObj("chat", -1)); Tcl_ListObjAppendElement(handler->interp, arg, Tcl_NewStringObj(purple_chat_get_name((PurpleChat *)node), -1)); Tcl_ListObjAppendElement(handler->interp, arg, purple_tcl_ref_new(PurpleTclRefAccount, purple_chat_get_account((PurpleChat *)node))); case PURPLE_BLIST_OTHER_NODE: arg = Tcl_NewStringObj("other", -1); Tcl_ListObjAppendElement(handler->interp, cmd, arg); /* Call the friggin' procedure already */ if (Tcl_EvalObjEx(handler->interp, cmd, TCL_EVAL_GLOBAL) != TCL_OK) { purple_debug(PURPLE_DEBUG_ERROR, "tcl", "error evaluating callback: %s\n", Tcl_GetString(Tcl_GetObjResult(handler->interp))); result = Tcl_GetObjResult(handler->interp); /* handle return values -- strings and words only */ if (handler->returntype) { if (purple_value_get_type(handler->returntype) == PURPLE_TYPE_STRING) { retval = (void *)g_strdup(Tcl_GetString(result)); if (Tcl_GetIntFromObj(handler->interp, result, (int *)&retval) != TCL_OK) { purple_debug(PURPLE_DEBUG_ERROR, "tcl", "Error retrieving procedure result: %s\n", Tcl_GetString(Tcl_GetObjResult(handler->interp))); /* And finally clean up */ for (i = 0; i < handler->nargs; i++) { g_string_printf(name, "%s::arg%d", Tcl_GetString(handler->namespace), i); if (purple_value_is_outgoing(handler->argtypes[i]) && purple_value_get_type(handler->argtypes[i]) != PURPLE_TYPE_SUBTYPE) Tcl_UnlinkVar(handler->interp, name->str); /* We basically only have to deal with strings on the switch (purple_value_get_type(handler->argtypes[i])) { if (purple_value_is_outgoing(handler->argtypes[i])) { if (vals[i] != NULL && *(char **)vals[i] != NULL) { *strs[i] = g_strdup(vals[i]); g_string_free(name, TRUE); g_string_free(val, TRUE); static Tcl_Obj *new_cb_namespace () g_snprintf (name, sizeof(name), "::purple::_callback::cb_%d", cbnum++); return Tcl_NewStringObj (name, -1);