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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
* Portions Copyright (C) 2005, Anthony Minessale II
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Conditional logic dialplan functions
*
*/
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "asterisk.h"
/* ASTERISK_FILE_VERSION(__FILE__, "$Revision: 27051 $") */
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/logger.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"
#include "asterisk/config.h" /* for ast_true */
static char *builtin_function_isnull(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
{
return data && *data ? "0" : "1";
}
static char *builtin_function_exists(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
{
return data && *data ? "1" : "0";
}
static char *builtin_function_iftime(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
{
struct ast_timing timing;
char *ret;
char *expr;
char *iftrue;
char *iffalse;
if (!(data = ast_strdupa(data))) {
ast_log(LOG_WARNING, "Memory Error!\n");
return NULL;
}
data = ast_strip_quoted(data, "\"", "\"");
expr = strsep(&data, "?");
iftrue = strsep(&data, ":");
iffalse = data;
if (ast_strlen_zero(expr) || !(iftrue || iffalse)) {
ast_log(LOG_WARNING, "Syntax IFTIME(<timespec>?[<true>][:<false>])\n");
return NULL;
}
if (!ast_build_timing(&timing, expr)) {
ast_log(LOG_WARNING, "Invalid Time Spec.\n");
return NULL;
}
if (iftrue)
iftrue = ast_strip_quoted(iftrue, "\"", "\"");
if (iffalse)
iffalse = ast_strip_quoted(iffalse, "\"", "\"");
if ((ret = ast_check_timing(&timing) ? iftrue : iffalse)) {
ast_copy_string(buf, ret, len);
ret = buf;
}
return ret;
}
static char *builtin_function_if(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
{
char *ret;
char *expr;
char *iftrue;
char *iffalse;
if (!(data = ast_strdupa(data))) {
ast_log(LOG_WARNING, "Memory Error!\n");
return NULL;
}
data = ast_strip_quoted(data, "\"", "\"");
expr = strsep(&data, "?");
iftrue = strsep(&data, ":");
iffalse = data;
if (ast_strlen_zero(expr) || !(iftrue || iffalse)) {
ast_log(LOG_WARNING, "Syntax IF(<expr>?[<true>][:<false>])\n");
return NULL;
}
expr = ast_strip(expr);
if (iftrue)
iftrue = ast_strip_quoted(iftrue, "\"", "\"");
if (iffalse)
iffalse = ast_strip_quoted(iffalse, "\"", "\"");
if ((ret = pbx_checkcondition(expr) ? iftrue : iffalse)) {
ast_copy_string(buf, ret, len);
ret = buf;
}
return ret;
}
static char *builtin_function_set(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
{
char *varname;
char *val;
if (!(data = ast_strdupa(data))) {
ast_log(LOG_WARNING, "Memory Error!\n");
return NULL;
}
varname = strsep(&data, "=");
val = data;
if (ast_strlen_zero(varname) || !val) {
ast_log(LOG_WARNING, "Syntax SET(<varname>=[<value>])\n");
return NULL;
}
varname = ast_strip(varname);
val = ast_strip(val);
pbx_builtin_setvar_helper(chan, varname, val);
ast_copy_string(buf, val, len);
return buf;
}
#ifndef BUILTIN_FUNC
static
#endif
struct ast_custom_function isnull_function = {
.name = "ISNULL",
.synopsis = "NULL Test: Returns 1 if NULL or 0 otherwise",
.syntax = "ISNULL(<data>)",
.read = builtin_function_isnull,
};
#ifndef BUILTIN_FUNC
static
#endif
struct ast_custom_function set_function = {
.name = "SET",
.synopsis = "SET assigns a value to a channel variable",
.syntax = "SET(<varname>=[<value>])",
.read = builtin_function_set,
};
#ifndef BUILTIN_FUNC
static
#endif
struct ast_custom_function exists_function = {
.name = "EXISTS",
.synopsis = "Existence Test: Returns 1 if exists, 0 otherwise",
.syntax = "EXISTS(<data>)",
.read = builtin_function_exists,
};
#ifndef BUILTIN_FUNC
static
#endif
struct ast_custom_function if_function = {
.name = "IF",
.synopsis = "Conditional: Returns the data following '?' if true else the data following ':'",
.syntax = "IF(<expr>?[<true>][:<false>])",
.read = builtin_function_if,
};
#ifndef BUILTIN_FUNC
static
#endif
struct ast_custom_function if_time_function = {
.name = "IFTIME",
.synopsis = "Temporal Conditional: Returns the data following '?' if true else the data following ':'",
.syntax = "IFTIME(<timespec>?[<true>][:<false>])",
.read = builtin_function_iftime,
};
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