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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* 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 striplsd: Strip trailing digits app
*
* \ingroup applications
*/
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/lock.h"
static char *tdesc = "Strip trailing digits";
static char *descrip =
" StripLSD(count): Strips the trailing 'count' digits from the channel's\n"
"associated extension. For example, the number 5551212 when stripped with a\n"
"count of 4 would be changed to 555. The PBX will continue processing at the\n""next priority for the *new* extension.\n"
" So, for example, if priority 3 of 5551212 is StripLSD 4, the next step\n"
"executed will be priority 4 of 555. If you switch into an extension which\n"
"has no first step, the PBX will treat it as though the user dialed an\n"
"invalid extension.\n";
static char *app = "StripLSD";
static char *synopsis = "Strip Least Significant Digits";
STANDARD_LOCAL_USER;
LOCAL_USER_DECL;
static int striplsd_exec(struct ast_channel *chan, void *data)
{
char newexten[AST_MAX_EXTENSION] = "";
int maxbytes = 0;
int stripcount = 0;
int extlen = strlen(chan->exten);
struct localuser *u;
LOCAL_USER_ADD(u);
maxbytes = sizeof(newexten) - 1;
if (data) {
stripcount = atoi(data);
}
if (!stripcount) {
ast_log(LOG_DEBUG, "Ignoring, since number of digits to strip is 0\n");
LOCAL_USER_REMOVE(u);
return 0;
}
if (extlen > stripcount) {
if (extlen - stripcount <= maxbytes) {
maxbytes = extlen - stripcount;
}
strncpy(newexten, chan->exten, maxbytes);
}
strncpy(chan->exten, newexten, sizeof(chan->exten)-1);
LOCAL_USER_REMOVE(u);
return 0;
}
int unload_module(void)
{
int res;
res = ast_unregister_application(app);
STANDARD_HANGUP_LOCALUSERS;
return res;
}
int load_module(void)
{
return ast_register_application(app, striplsd_exec, synopsis, descrip);
}
char *description(void)
{
return tdesc;
}
int usecount(void)
{
int res;
STANDARD_USECOUNT(res);
return res;
}
char *key()
{
return ASTERISK_GPL_KEY;
}
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