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Gosub arguments (Issue 7780)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@43667 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Tilghman Lesher
2006-09-26 17:25:27 +00:00
parent fe1a3b8877
commit c8e3edeb8e
1 changed files with 71 additions and 11 deletions
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82
apps/app_stack.c
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@@ -1,7 +1,7 @@
/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (c) 2004-2006 Tilghman Lesher <app_stack_v002@the-tilghman.com>.
* Copyright (c) 2004-2006 Tilghman Lesher <app_stack_v003@the-tilghman.com>.
*
* This code is released by the author with no restrictions on usage.
*
@@ -20,7 +20,7 @@
*
* \brief Stack applications Gosub, Return, etc.
*
* \author Tilghman Lesher <app_stack_v002@the-tilghman.com>
* \author Tilghman Lesher <app_stack_v003@the-tilghman.com>
*
* \ingroup applications
*/
@@ -41,6 +41,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/config.h"
#include "asterisk/app.h"
#define STACKVAR "~GOSUB~STACK~"
@@ -56,10 +57,10 @@ static const char *return_synopsis = "Return from gosub routine";
static const char *pop_synopsis = "Remove one address from gosub stack";
static const char *gosub_descrip =
"Gosub([[context|]exten|]priority)\n"
"Gosub([[context|]exten|]priority[:arg1[|...][|argN]])\n"
" Jumps to the label specified, saving the return address.\n";
static const char *gosubif_descrip =
"GosubIf(condition?labeliftrue[:labeliffalse])\n"
"GosubIf(condition?labeliftrue[:labeliffalse[:arg1[|...][|argN]]])\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";
@@ -73,6 +74,20 @@ static const char *pop_descrip =
static int pop_exec(struct ast_channel *chan, void *data)
{
const char *frame = pbx_builtin_getvar_helper(chan, STACKVAR);
int numargs = 0, i;
char argname[15];
/* Pop any arguments for this stack frame off the variable stack */
if (frame) {
numargs = atoi(frame);
for (i = 1; i <= numargs; i++) {
snprintf(argname, sizeof(argname), "ARG%d", i);
pbx_builtin_setvar_helper(chan, argname, NULL);
}
}
/* Remove the last frame from the Gosub stack */
pbx_builtin_setvar_helper(chan, STACKVAR, NULL);
return 0;
@@ -81,37 +96,74 @@ static int pop_exec(struct ast_channel *chan, void *data)
static int return_exec(struct ast_channel *chan, void *data)
{
const char *label = pbx_builtin_getvar_helper(chan, STACKVAR);
char argname[15], *retval = data;
int numargs, i;
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)) {
}
/* Pop any arguments for this stack frame off the variable stack */
numargs = atoi(label);
for (i = 1; i <= numargs; i++) {
snprintf(argname, sizeof(argname), "ARG%d", i);
pbx_builtin_setvar_helper(chan, argname, NULL);
}
/* If the label exists, it will always have a ':' */
label = strchr(label, ':') + 1;
if (ast_parseable_goto(chan, label)) {
ast_log(LOG_WARNING, "No next statement after Gosub?\n");
return -1;
}
/* Remove the current frame from the Gosub stack */
pbx_builtin_setvar_helper(chan, STACKVAR, NULL);
/* Set a return value, if any */
pbx_builtin_setvar_helper(chan, "GOSUB_RETVAL", S_OR(retval, ""));
return 0;
}
static int gosub_exec(struct ast_channel *chan, void *data)
{
char newlabel[AST_MAX_EXTENSION * 2 + 3 + 11];
char newlabel[AST_MAX_EXTENSION + AST_MAX_CONTEXT + 11 + 11 + 4];
char argname[15], *tmp = ast_strdupa(data);
int i;
struct ast_module_user *u;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(label);
AST_APP_ARG(args);
);
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)\n", app_gosub, app_gosub);
ast_log(LOG_ERROR, "%s requires an argument: %s([[context|]exten|]priority[:arg1[|...][|argN]])\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);
AST_NONSTANDARD_APP_ARGS(args, tmp, ':');
AST_STANDARD_APP_ARGS(args2, args.args);
snprintf(newlabel, sizeof(newlabel), "%d:%s|%s|%d", args2.argc, chan->context, chan->exten, chan->priority + 1);
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]);
}
pbx_builtin_pushvar_helper(chan, STACKVAR, newlabel);
ast_module_user_remove(u);
@@ -135,14 +187,22 @@ static int gosubif_exec(struct ast_channel *chan, void *data)
condition = strsep(&args, "?");
label1 = strsep(&args, ":");
label2 = args;
label2 = strsep(&args, ":");
if (pbx_checkcondition(condition)) {
if (label1) {
res = gosub_exec(chan, label1);
int len = (args ? strlen(args) : 0) + strlen(label1) + 2;
char *args2 = alloca(len);
snprintf(args2, len, "%s%c%s", label1, args ? ':' : '\0', args ? args : "");
res = gosub_exec(chan, args2);
}
} else if (label2) {
res = gosub_exec(chan, label2);
int len = (args ? strlen(args) : 0) + strlen(label2) + 2;
char *args2 = alloca(len);
snprintf(args2, len, "%s%c%s", label2, args ? ':' : '\0', args ? args : "");
res = gosub_exec(chan, args2);
}
ast_module_user_remove(u);