/*
* Asterisk -- An open source telephony toolkit.
*
- * Copyright (c) 2004-2006 Tilghman Lesher <app_stack_v003@the-tilghman.com>.
+ * Copyright (c) 2004-2006 Tilghman Lesher <app_stack_v002@the-tilghman.com>.
*
* This code is released by the author with no restrictions on usage.
*
*
* \brief Stack applications Gosub, Return, etc.
*
- * \author Tilghman Lesher <app_stack_v003@the-tilghman.com>
+ * \author Tilghman Lesher <app_stack_v002@the-tilghman.com>
*
* \ingroup applications
*/
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/config.h"
-#include "asterisk/app.h"
#define STACKVAR "~GOSUB~STACK~"
+
static const char *app_gosub = "Gosub";
static const char *app_gosubif = "GosubIf";
static const char *app_return = "Return";
static const char *pop_synopsis = "Remove one address from gosub stack";
static const char *gosub_descrip =
-"Gosub([[context|]exten|]priority[(arg1[|...][|argN])])\n"
+"Gosub([[context|]exten|]priority)\n"
" Jumps to the label specified, saving the return address.\n";
static const char *gosubif_descrip =
-"GosubIf(condition?labeliftrue[(arg1[|...])][:labeliffalse[(arg1[|...])]])\n"
+"GosubIf(condition?labeliftrue[:labeliffalse])\n"
" If the condition is true, then jump to labeliftrue. If false, jumps to\n"
"labeliffalse, if specified. In either case, a jump saves the return point\n"
"in the dialplan, to be returned to with a Return.\n";
static const char *return_descrip =
-"Return([return-value])\n"
-" Jumps to the last label on the stack, removing it. The return value, if\n"
-"any, is saved in the channel variable GOSUB_RETVAL.\n";
+"Return()\n"
+" Jumps to the last label on the stack, removing it.\n";
static const char *pop_descrip =
"StackPop()\n"
" Removes last label on the stack, discarding it.\n";
-static void gosub_free(void *data);
-
-static struct ast_datastore_info stack_info = {
- .type = "GOSUB",
- .destroy = gosub_free,
-};
-
-struct gosub_stack_frame {
- AST_LIST_ENTRY(gosub_stack_frame) entries;
- /* 100 arguments is all that we support anyway, but this will handle up to 255 */
- unsigned char arguments;
- int priority;
- char *context;
- char extension[0];
-};
-
-static void gosub_release_frame(struct ast_channel *chan, struct gosub_stack_frame *frame)
-{
- unsigned char i;
- char argname[15];
-
- /* If chan is not defined, then we're calling it as part of gosub_free,
- * and the channel variables will be deallocated anyway. Otherwise, we're
- * just releasing a single frame, so we need to clean up the arguments for
- * that frame, so that we re-expose the variables from the previous frame
- * that were hidden by this one.
- */
- if (chan) {
- for (i = 1; i <= frame->arguments && i != 0; i++) {
- snprintf(argname, sizeof(argname), "ARG%hhd", i);
- pbx_builtin_setvar_helper(chan, argname, NULL);
- }
- }
- ast_free(frame);
-}
-
-static struct gosub_stack_frame *gosub_allocate_frame(const char *context, const char *extension, int priority, unsigned char arguments)
-{
- struct gosub_stack_frame *new = NULL;
- int len_extension = strlen(extension), len_context = strlen(context);
-
- if ((new = ast_calloc(1, sizeof(*new) + 2 + len_extension + len_context))) {
- strcpy(new->extension, extension);
- new->context = new->extension + len_extension + 1;
- strcpy(new->context, context);
- new->priority = priority;
- new->arguments = arguments;
- }
- return new;
-}
-
-static void gosub_free(void *data)
-{
- AST_LIST_HEAD(, gosub_stack_frame) *oldlist = data;
- struct gosub_stack_frame *oldframe;
- AST_LIST_LOCK(oldlist);
- while ((oldframe = AST_LIST_REMOVE_HEAD(oldlist, entries))) {
- gosub_release_frame(NULL, oldframe);
- }
- AST_LIST_UNLOCK(oldlist);
- AST_LIST_HEAD_DESTROY(oldlist);
- ast_free(oldlist);
-}
-
static int pop_exec(struct ast_channel *chan, void *data)
{
- struct ast_datastore *stack_store = ast_channel_datastore_find(chan, &stack_info, NULL);
- struct gosub_stack_frame *oldframe;
- AST_LIST_HEAD(, gosub_stack_frame) *oldlist;
-
- if (!stack_store) {
- ast_log(LOG_WARNING, "%s called with no gosub stack allocated.\n", app_pop);
- return 0;
- }
-
- oldlist = stack_store->data;
- AST_LIST_LOCK(oldlist);
- oldframe = AST_LIST_REMOVE_HEAD(oldlist, entries);
- AST_LIST_UNLOCK(oldlist);
-
- if (oldframe)
- gosub_release_frame(chan, oldframe);
- else if (option_debug)
- ast_log(LOG_DEBUG, "%s called with an empty gosub stack\n", app_pop);
+ pbx_builtin_setvar_helper(chan, STACKVAR, NULL);
return 0;
}
static int return_exec(struct ast_channel *chan, void *data)
{
- struct ast_datastore *stack_store = ast_channel_datastore_find(chan, &stack_info, NULL);
- struct gosub_stack_frame *oldframe;
- AST_LIST_HEAD(, gosub_stack_frame) *oldlist;
- char *retval = data;
+ const char *label = pbx_builtin_getvar_helper(chan, STACKVAR);
- if (!stack_store) {
- ast_log(LOG_ERROR, "Return without Gosub: stack is unallocated\n");
- return -1;
- }
-
- oldlist = stack_store->data;
- AST_LIST_LOCK(oldlist);
- oldframe = AST_LIST_REMOVE_HEAD(oldlist, entries);
- AST_LIST_UNLOCK(oldlist);
-
- if (!oldframe) {
+ if (ast_strlen_zero(label)) {
ast_log(LOG_ERROR, "Return without Gosub: stack is empty\n");
return -1;
+ } else if (ast_parseable_goto(chan, label)) {
+ ast_log(LOG_WARNING, "No next statement after Gosub?\n");
+ return -1;
}
- ast_explicit_goto(chan, oldframe->context, oldframe->extension, oldframe->priority);
- gosub_release_frame(chan, oldframe);
-
- /* Set a return value, if any */
- pbx_builtin_setvar_helper(chan, "GOSUB_RETVAL", S_OR(retval, ""));
+ pbx_builtin_setvar_helper(chan, STACKVAR, NULL);
return 0;
}
static int gosub_exec(struct ast_channel *chan, void *data)
{
- struct ast_datastore *stack_store = ast_channel_datastore_find(chan, &stack_info, NULL);
- AST_LIST_HEAD(, gosub_stack_frame) *oldlist;
- struct gosub_stack_frame *newframe;
- char argname[15], *tmp = ast_strdupa(data), *label, *endparen;
- int i;
+ char newlabel[AST_MAX_EXTENSION * 2 + 3 + 11];
struct ast_module_user *u;
- AST_DECLARE_APP_ARGS(args2,
- AST_APP_ARG(argval)[100];
- );
if (ast_strlen_zero(data)) {
- ast_log(LOG_ERROR, "%s requires an argument: %s([[context|]exten|]priority[(arg1[|...][|argN])])\n", app_gosub, app_gosub);
+ ast_log(LOG_ERROR, "%s requires an argument: %s([[context|]exten|]priority)\n", app_gosub, app_gosub);
return -1;
}
u = ast_module_user_add(chan);
+ snprintf(newlabel, sizeof(newlabel), "%s|%s|%d", chan->context, chan->exten, chan->priority + 1);
- if (!stack_store) {
- if (option_debug)
- ast_log(LOG_DEBUG, "Channel %s has no datastore, so we're allocating one.\n", chan->name);
- stack_store = ast_channel_datastore_alloc(&stack_info, NULL);
- if (!stack_store) {
- ast_log(LOG_ERROR, "Unable to allocate new datastore. Gosub will fail.\n");
- ast_module_user_remove(u);
- return -1;
- }
-
- oldlist = ast_calloc(1, sizeof(*oldlist));
- if (!oldlist) {
- ast_log(LOG_ERROR, "Unable to allocate datastore list head. Gosub will fail.\n");
- ast_channel_datastore_free(stack_store);
- ast_module_user_remove(u);
- return -1;
- }
-
- stack_store->data = oldlist;
- AST_LIST_HEAD_INIT(oldlist);
- ast_channel_datastore_add(chan, stack_store);
- }
-
- /* Separate the arguments from the label */
- /* NOTE: you cannot use ast_app_separate_args for this, because '(' cannot be used as a delimiter. */
- label = strsep(&tmp, "(");
- if (tmp) {
- endparen = strrchr(tmp, ')');
- if (endparen)
- *endparen = '\0';
- else
- ast_log(LOG_WARNING, "Ouch. No closing paren: '%s'?\n", (char *)data);
- AST_STANDARD_APP_ARGS(args2, tmp);
- } else
- args2.argc = 0;
-
- /* Create the return address, but don't save it until we know that the Gosub destination exists */
- newframe = gosub_allocate_frame(chan->context, chan->exten, chan->priority + 1, args2.argc);
-
- if (ast_parseable_goto(chan, label)) {
- ast_log(LOG_ERROR, "Gosub address is invalid: '%s'\n", (char *)data);
- ast_free(newframe);
+ if (ast_parseable_goto(chan, data)) {
ast_module_user_remove(u);
return -1;
}
- /* Now that we know for certain that we're going to a new location, set our arguments */
- for (i = 0; i < args2.argc; i++) {
- snprintf(argname, sizeof(argname), "ARG%d", i + 1);
- pbx_builtin_pushvar_helper(chan, argname, args2.argval[i]);
- if (option_debug)
- ast_log(LOG_DEBUG, "Setting '%s' to '%s'\n", argname, args2.argval[i]);
- }
-
- /* And finally, save our return address */
- oldlist = stack_store->data;
- AST_LIST_LOCK(oldlist);
- AST_LIST_INSERT_HEAD(oldlist, newframe, entries);
- AST_LIST_UNLOCK(oldlist);
-
+ pbx_builtin_pushvar_helper(chan, STACKVAR, newlabel);
ast_module_user_remove(u);
return 0;
static int gosubif_exec(struct ast_channel *chan, void *data)
{
struct ast_module_user *u;
- char *args;
+ char *condition="", *label1, *label2, *args;
int res=0;
- AST_DECLARE_APP_ARGS(cond,
- AST_APP_ARG(ition);
- AST_APP_ARG(labels);
- );
- AST_DECLARE_APP_ARGS(label,
- AST_APP_ARG(iftrue);
- AST_APP_ARG(iffalse);
- );
if (ast_strlen_zero(data)) {
- ast_log(LOG_WARNING, "GosubIf requires an argument: GosubIf(cond?label1(args):label2(args)\n");
+ ast_log(LOG_WARNING, "GosubIf requires an argument\n");
return 0;
}
- u = ast_module_user_add(chan);
-
args = ast_strdupa(data);
- AST_NONSTANDARD_APP_ARGS(cond, args, '?');
- if (cond.argc != 2) {
- ast_log(LOG_WARNING, "GosubIf requires an argument: GosubIf(cond?label1(args):label2(args)\n");
- ast_module_user_remove(u);
- return 0;
- }
- AST_NONSTANDARD_APP_ARGS(label, cond.labels, ':');
+ u = ast_module_user_add(chan);
- if (pbx_checkcondition(cond.ition)) {
- if (!ast_strlen_zero(label.iftrue))
- res = gosub_exec(chan, label.iftrue);
- } else if (!ast_strlen_zero(label.iffalse)) {
- res = gosub_exec(chan, label.iffalse);
+ condition = strsep(&args, "?");
+ label1 = strsep(&args, ":");
+ label2 = args;
+
+ if (pbx_checkcondition(condition)) {
+ if (label1) {
+ res = gosub_exec(chan, label1);
+ }
+ } else if (label2) {
+ res = gosub_exec(chan, label2);
}
ast_module_user_remove(u);
projects / thirdparty / asterisk.git / commitdiff
