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/*
* Asterisk -- A telephony toolkit for Linux.
*
* String manipulation dialplan functions
*
* Copyright (C) 2005, Digium, Inc.
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*/
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <regex.h>
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/logger.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"
static char *function_fieldqty(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
{
char *varname, *varval, workspace[256];
char *delim = ast_strdupa(data);
int fieldcount = 0;
if (delim) {
varname = strsep(&delim, "|");
pbx_retrieve_variable(chan, varname, &varval, workspace, sizeof(workspace), NULL);
while (strsep(&varval, delim))
fieldcount++;
snprintf(buf, len, "%d", fieldcount);
} else {
ast_log(LOG_ERROR, "Out of memory\n");
strncpy(buf, "1", len);
}
return buf;
}
#ifndef BUILTIN_FUNC
static
#endif
struct ast_custom_function fieldqty_function = {
.name = "FIELDQTY",
.synopsis = "Count the fields, with an arbitrary delimiter",
.syntax = "FIELDQTY(<varname>,<delim>)",
.read = function_fieldqty,
};
static char *builtin_function_regex(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
{
char *ret_true = "1", *ret_false = "0", *ret;
char *arg, *earg, *tmp, errstr[256] = "";
int errcode;
regex_t regexbuf;
ret = ret_false; /* convince me otherwise */
tmp = ast_strdupa(data);
if (tmp) {
/* Regex in quotes */
arg = strchr(tmp, '"');
if (arg) {
arg++;
earg = strrchr(arg, '"');
if (earg) {
*earg = '\0';
}
} else {
arg = tmp;
}
if ((errcode = regcomp(®exbuf, arg, REG_EXTENDED | REG_NOSUB))) {
regerror(errcode, ®exbuf, errstr, sizeof(errstr));
ast_log(LOG_WARNING, "Malformed input %s(%s): %s\n", cmd, data, errstr);
ret = NULL;
} else {
ret = regexec(®exbuf, data, 0, NULL, 0) ? ret_false : ret_true;
}
regfree(®exbuf);
} else {
ast_log(LOG_ERROR, "Out of memory in %s(%s)\n", cmd, data);
}
return ret;
}
#ifndef BUILTIN_FUNC
static
#endif
struct ast_custom_function regex_function = {
.name = "REGEX",
.synopsis = "Regular Expression: Returns 1 if data matches regular expression.",
.syntax = "REGEX(\"<regular expression>\" <data>)",
.read = builtin_function_regex,
};
static char *builtin_function_len(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
{
int length = 0;
if (data) {
length = strlen(data);
}
snprintf(buf, len, "%d", length);
return buf;
}
#ifndef BUILTIN_FUNC
static
#endif
struct ast_custom_function len_function = {
.name = "LEN",
.synopsis = "Returns the length of the argument given",
.syntax = "LEN(<string>)",
.read = builtin_function_len,
};