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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2006, Digium, Inc.
* Copyright (C) 2006, Claude Patry
*
* 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 Generate Random Number
*
* \author Claude Patry <cpatry@gmail.com>
* \author Tilghman Lesher ( http://asterisk.drunkcoder.com/ )
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/logger.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"
STANDARD_LOCAL_USER;
LOCAL_USER_DECL;
static int acf_rand_exec(struct ast_channel *chan, char *cmd,
char *parse, char *buffer, size_t buflen)
{
struct localuser *u;
int min_int, response_int, max_int;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(min);
AST_APP_ARG(max);
);
LOCAL_USER_ACF_ADD(u);
AST_STANDARD_APP_ARGS(args, parse);
if (ast_strlen_zero(args.min) || sscanf(args.min, "%d", &min_int) != 1)
min_int = 0;
if (ast_strlen_zero(args.max) || sscanf(args.max, "%d", &max_int) != 1)
max_int = RAND_MAX;
if (max_int < min_int) {
int tmp = max_int;
max_int = min_int;
min_int = tmp;
ast_log(LOG_DEBUG, "max<min\n");
}
response_int = min_int + (ast_random() % (max_int - min_int + 1));
ast_log(LOG_DEBUG, "%d was the lucky number in range [%d,%d]\n",
response_int, min_int, max_int);
snprintf(buffer, buflen, "%d", response_int);
LOCAL_USER_REMOVE(u);
return 0;
}
static struct ast_custom_function acf_rand = {
.name = "RAND",
.synopsis = "Choose a random number in a range",
.syntax = "RAND([min][,max])",
.desc =
"Choose a random number between min and max. Min defaults to 0, if not\n"
"specified, while max defaults to RAND_MAX (2147483647 on many systems).\n"
" Example: Set(junky=${RAND(1,8)}); \n"
" Sets junky to a random number between 1 and 8, inclusive.\n",
.read = acf_rand_exec,
};
static char *tdesc = "Random number dialplan function";
int unload_module(void)
{
ast_custom_function_unregister(&acf_rand);
return 0;
}
int load_module(void)
{
return ast_custom_function_register(&acf_rand);
}
char *description(void)
{
return tdesc;
}
int usecount(void)
{
return 0;
}
char *key()
{
return ASTERISK_GPL_KEY;
}
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