git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@7221 65c4cc65-6c06-0410-ace0-fbb531ad65f3
226 lines
5.6 KiB
C
226 lines
5.6 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2005, Digium, Inc.
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* Portions Copyright (C) 2005, Tilghman Lesher. All rights reserved.
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* Portions Copyright (C) 2005, Anthony Minessale II
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief String manipulation dialplan functions
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <regex.h>
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#include "asterisk.h"
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/* ASTERISK_FILE_VERSION(__FILE__, "$Revision$") */
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/logger.h"
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#include "asterisk/utils.h"
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#include "asterisk/app.h"
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#include "asterisk/localtime.h"
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static char *function_fieldqty(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
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{
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char *varname, *varval, workspace[256];
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char *delim = ast_strdupa(data);
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int fieldcount = 0;
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if (delim) {
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varname = strsep(&delim, "|");
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pbx_retrieve_variable(chan, varname, &varval, workspace, sizeof(workspace), NULL);
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while (strsep(&varval, delim))
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fieldcount++;
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snprintf(buf, len, "%d", fieldcount);
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} else {
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ast_log(LOG_ERROR, "Out of memory\n");
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strncpy(buf, "1", len);
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}
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return buf;
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}
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#ifndef BUILTIN_FUNC
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static
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#endif
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struct ast_custom_function fieldqty_function = {
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.name = "FIELDQTY",
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.synopsis = "Count the fields, with an arbitrary delimiter",
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.syntax = "FIELDQTY(<varname>,<delim>)",
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.read = function_fieldqty,
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};
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static char *builtin_function_regex(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
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{
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char *arg, *earg = NULL, *tmp, errstr[256] = "";
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int errcode;
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regex_t regexbuf;
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ast_copy_string(buf, "0", len);
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tmp = ast_strdupa(data);
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if (!tmp) {
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ast_log(LOG_ERROR, "Out of memory in %s(%s)\n", cmd, data);
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return buf;
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}
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/* Regex in quotes */
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arg = strchr(tmp, '"');
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if (arg) {
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arg++;
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earg = strrchr(arg, '"');
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if (earg) {
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*earg++ = '\0';
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/* Skip over any spaces before the data we are checking */
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while (*earg == ' ')
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earg++;
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}
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} else {
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arg = tmp;
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}
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if ((errcode = regcomp(®exbuf, arg, REG_EXTENDED | REG_NOSUB))) {
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regerror(errcode, ®exbuf, errstr, sizeof(errstr));
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ast_log(LOG_WARNING, "Malformed input %s(%s): %s\n", cmd, data, errstr);
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} else {
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if (!regexec(®exbuf, earg ? earg : "", 0, NULL, 0))
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ast_copy_string(buf, "1", len);
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}
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regfree(®exbuf);
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return buf;
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}
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#ifndef BUILTIN_FUNC
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static
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#endif
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struct ast_custom_function regex_function = {
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.name = "REGEX",
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.synopsis = "Regular Expression: Returns 1 if data matches regular expression.",
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.syntax = "REGEX(\"<regular expression>\" <data>)",
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.read = builtin_function_regex,
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};
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static char *builtin_function_len(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
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{
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int length = 0;
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if (data) {
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length = strlen(data);
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}
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snprintf(buf, len, "%d", length);
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return buf;
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}
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#ifndef BUILTIN_FUNC
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static
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#endif
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struct ast_custom_function len_function = {
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.name = "LEN",
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.synopsis = "Returns the length of the argument given",
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.syntax = "LEN(<string>)",
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.read = builtin_function_len,
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};
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static char *acf_strftime(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
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{
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char *format, *epoch, *timezone = NULL;
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long epochi;
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struct tm time;
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buf[0] = '\0';
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if (!data) {
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ast_log(LOG_ERROR, "Asterisk function STRFTIME() requires an argument.\n");
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return buf;
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}
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format = ast_strdupa(data);
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if (!format) {
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ast_log(LOG_ERROR, "Out of memory\n");
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return buf;
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}
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epoch = strsep(&format, "|");
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timezone = strsep(&format, "|");
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if (ast_strlen_zero(epoch) || !sscanf(epoch, "%ld", &epochi)) {
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struct timeval tv = ast_tvnow();
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epochi = tv.tv_sec;
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}
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ast_localtime(&epochi, &time, timezone);
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if (!format) {
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format = "%c";
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}
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if (!strftime(buf, len, format, &time)) {
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ast_log(LOG_WARNING, "C function strftime() output nothing?!!\n");
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}
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buf[len - 1] = '\0';
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return buf;
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}
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#ifndef BUILTIN_FUNC
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static
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#endif
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struct ast_custom_function strftime_function = {
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.name = "STRFTIME",
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.synopsis = "Returns the current date/time in a specified format.",
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.syntax = "STRFTIME([<epoch>][,[timezone][,format]])",
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.read = acf_strftime,
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};
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static char *function_eval(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
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{
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memset(buf, 0, len);
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "EVAL requires an argument: EVAL(<string>)\n");
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return buf;
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}
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pbx_substitute_variables_helper(chan, data, buf, len - 1);
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return buf;
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}
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#ifndef BUILTIN_FUNC
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static
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#endif
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struct ast_custom_function eval_function = {
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.name = "EVAL",
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.synopsis = "Evaluate stored variables.",
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.syntax = "EVAL(<variable>)",
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.desc = "Using EVAL basically causes a string to be evaluated twice.\n"
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"When a variable or expression is in the dialplan, it will be\n"
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"evaluated at runtime. However, if the result of the evaluation\n"
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"is in fact a variable or expression, using EVAL will have it\n"
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"evaluated a second time. For example, if the variable ${MYVAR}\n"
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"contains \"${OTHERVAR}\", then the result of putting ${EVAL(${MYVAR})}\n"
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"in the dialplan will be the contents of the variable, OTHERVAR.\n"
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"Normally, by just putting ${MYVAR} in the dialplan, you would be\n"
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"left with \"${OTHERVAR}\".\n",
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.read = function_eval,
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};
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