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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (c) 2005,2006,2007 Sven Slezak <sunny@mezzo.net>
*
* 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 Charset conversions
*
* \author Sven Slezak <sunny@mezzo.net>
*
* \ingroup functions
*/
/*** MODULEINFO
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <ctype.h>
#include <errno.h>
#include <iconv.h>
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/logger.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"
#include "asterisk/options.h"
Russell Bryant
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/*!
* Some systems define the second arg to iconv() as (const char *),
* while others define it as (char *). Cast it to a (void *) to
* suppress compiler warnings about it.
*/
#define AST_ICONV_CAST void *
static int iconv_read(struct ast_channel *chan, const char *cmd, char *arguments, char *buf, size_t len)
{
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(in_charset);
AST_APP_ARG(out_charset);
AST_APP_ARG(text);
);
iconv_t cd;
size_t incount, outcount = len;
char *parse;
if (ast_strlen_zero(arguments)) {
ast_log(LOG_WARNING, "Syntax: ICONV(<in-charset>,<out-charset>,<text>) - missing arguments!\n");
return -1;
}
parse = ast_strdupa(arguments);
AST_STANDARD_APP_ARGS(args, parse);
if (args.argc < 3) {
ast_log(LOG_WARNING, "Syntax: ICONV(<in-charset>,<out-charset>,<text>) %d\n", args.argc);
return -1;
}
incount = strlen(args.text);
ast_debug(1, "Iconv: \"%s\" %s -> %s\n", args.text, args.in_charset, args.out_charset);
cd = iconv_open(args.out_charset, args.in_charset);
if (cd == (iconv_t) -1) {
ast_log(LOG_ERROR, "conversion from '%s' to '%s' not available. type 'iconv -l' in a shell to list the supported charsets.\n", args.in_charset, args.out_charset);
return -1;
}
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if (iconv(cd, (AST_ICONV_CAST) &args.text, &incount, &buf, &outcount) == (size_t) -1) {
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if (errno == E2BIG)
ast_log(LOG_WARNING, "Iconv: output buffer too small.\n");
else if (errno == EILSEQ)
ast_log(LOG_WARNING, "Iconv: illegal character.\n");
else if (errno == EINVAL)
ast_log(LOG_WARNING, "Iconv: incomplete character sequence.\n");
else
ast_log(LOG_WARNING, "Iconv: error %d: %s.\n", errno, strerror(errno));
}
iconv_close(cd);
return 0;
}
static struct ast_custom_function iconv_function = {
.name = "ICONV",
.synopsis = "Converts charsets of strings.",
.desc =
"Converts string from in-charset into out-charset. For available charsets,\n"
"use 'iconv -l' on your shell command line.\n"
"Note: due to limitations within the API, ICONV will not currently work with\n"
"charsets with embedded NULLs. If found, the string will terminate.\n",
.syntax = "ICONV(in-charset,out-charset,string)",
.read = iconv_read,
};
static int unload_module(void)
{
return ast_custom_function_unregister(&iconv_function);
}
static int load_module(void)
{
return ast_custom_function_register(&iconv_function);
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Charset conversions");