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/**
* @file tcl_cmd.c Purple Tcl cmd API
*
* purple
*
* Copyright (C) 2006 Etan Reisner <deryni@gmail.com>
*
* 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 <tcl.h>
#include "tcl_purple.h"
#include "internal.h"
#include "cmds.h"
#include "debug.h"
static GList *tcl_cmd_callbacks;
static PurpleCmdRet tcl_cmd_callback(PurpleConversation *conv, const gchar *cmd,
gchar **args, gchar **errors,
struct tcl_cmd_handler *handler);
static Tcl_Obj *new_cmd_cb_namespace(void);
void tcl_cmd_init()
{
tcl_cmd_callbacks = NULL;
}
void tcl_cmd_handler_free(struct tcl_cmd_handler *handler)
{
if (handler == NULL)
return;
Tcl_DecrRefCount(handler->namespace);
g_free(handler);
}
void tcl_cmd_cleanup(Tcl_Interp *interp)
{
GList *cur;
struct tcl_cmd_handler *handler;
for (cur = tcl_cmd_callbacks; cur != NULL; cur = g_list_next(cur)) {
handler = cur->data;
if (handler->interp == interp) {
purple_cmd_unregister(handler->id);
tcl_cmd_handler_free(handler);
cur->data = NULL;
}
}
tcl_cmd_callbacks = g_list_remove_all(tcl_cmd_callbacks, NULL);
}
PurpleCmdId tcl_cmd_register(struct tcl_cmd_handler *handler)
{
int id;
GString *proc;
if ((id = purple_cmd_register(Tcl_GetString(handler->cmd),
handler->args, handler->priority,
handler->flags, handler->prpl_id,
PURPLE_CMD_FUNC(tcl_cmd_callback),
handler->helpstr, (void *)handler)) == 0)
return 0;
handler->namespace = new_cmd_cb_namespace ();
Tcl_IncrRefCount(handler->namespace);
proc = g_string_new("");
g_string_append_printf(proc, "namespace eval %s { proc cb { conv cmd arglist } { %s } }",
Tcl_GetString(handler->namespace),
Tcl_GetString(handler->proc));
if (Tcl_Eval(handler->interp, proc->str) != TCL_OK) {
Tcl_DecrRefCount(handler->namespace);
g_string_free(proc, TRUE);
return 0;
}
g_string_free(proc, TRUE);
tcl_cmd_callbacks = g_list_append(tcl_cmd_callbacks, (gpointer)handler);
return id;
}
void tcl_cmd_unregister(PurpleCmdId id, Tcl_Interp *interp)
{
GList *cur;
GString *cmd;
gboolean found = FALSE;
struct tcl_cmd_handler *handler;
for (cur = tcl_cmd_callbacks; cur != NULL; cur = g_list_next(cur)) {
handler = cur->data;
if (handler->interp == interp && handler->id == id) {
purple_cmd_unregister(id);
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_cmd_handler_free(handler);
g_string_free(cmd, TRUE);
cur->data = NULL;
found = TRUE;
break;
}
}
if (found)
tcl_cmd_callbacks = g_list_remove_all(tcl_cmd_callbacks, NULL);
}
static PurpleCmdRet tcl_cmd_callback(PurpleConversation *conv, const gchar *cmd,
gchar **args, gchar **errors,
struct tcl_cmd_handler *handler)
{
int retval, error, i;
Tcl_Obj *command, *arg, *tclargs, *result;
command = Tcl_NewListObj(0, NULL);
Tcl_IncrRefCount(command);
/* The callback */
arg = Tcl_DuplicateObj(handler->namespace);
Tcl_AppendStringsToObj(arg, "::cb", NULL);
Tcl_ListObjAppendElement(handler->interp, command, arg);
/* The conversation */
arg = purple_tcl_ref_new(PurpleTclRefConversation, conv);
Tcl_ListObjAppendElement(handler->interp, command, arg);
/* The command */
arg = Tcl_NewStringObj(cmd, -1);
Tcl_ListObjAppendElement(handler->interp, command, arg);
/* The args list */
tclargs = Tcl_NewListObj(0, NULL);
for (i = 0; i < handler->nargs; i++) {
arg = Tcl_NewStringObj(args[i], -1);
Tcl_ListObjAppendElement(handler->interp, tclargs, arg);
}
Tcl_ListObjAppendElement(handler->interp, command, tclargs);
if ((error = Tcl_EvalObjEx(handler->interp, command,
TCL_EVAL_GLOBAL)) != TCL_OK) {
gchar *errorstr;
errorstr = g_strdup_printf("error evaluating callback: %s\n",
Tcl_GetString(Tcl_GetObjResult(handler->interp)));
purple_debug(PURPLE_DEBUG_ERROR, "tcl", errorstr);
*errors = errorstr;
retval = PURPLE_CMD_RET_FAILED;
} else {
result = Tcl_GetObjResult(handler->interp);
if ((error = Tcl_GetIntFromObj(handler->interp, result,
&retval)) != TCL_OK) {
gchar *errorstr;
errorstr = g_strdup_printf("Error retreiving procedure result: %s\n",
Tcl_GetString(Tcl_GetObjResult(handler->interp)));
purple_debug(PURPLE_DEBUG_ERROR, "tcl", errorstr);
*errors = errorstr;
retval = PURPLE_CMD_RET_FAILED;
}
}
return retval;
}
static Tcl_Obj *new_cmd_cb_namespace()
{
char name[32];
static int cbnum;
g_snprintf(name, sizeof(name), "::purple::_cmd_callback::cb_%d",
cbnum++);
return Tcl_NewStringObj(name, -1);
}
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