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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
<depend>iconv</depend>
<support_level>core</support_level>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision: 413587 $")
#include <ctype.h>
#include <iconv.h>
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"
/*** DOCUMENTATION
<function name="ICONV" language="en_US">
<synopsis>
Converts charsets of strings.
</synopsis>
<syntax>
<parameter name="in-charset" required="true">
<para>Input charset</para>
</parameter>
<parameter name="out-charset" required="true">
<para>Output charset</para>
</parameter>
<parameter name="string" required="true">
<para>String to convert, from <replaceable>in-charset</replaceable> to <replaceable>out-charset</replaceable></para>
</parameter>
</syntax>
<description>
<para>Converts string from <replaceable>in-charset</replaceable> into <replaceable>out-charset</replaceable>.
For available charsets, use <literal>iconv -l</literal> on your shell command line.</para>
<note><para>Due to limitations within the API, ICONV will not currently work with
charsets with embedded NULLs. If found, the string will terminate.</para></note>
</description>
</function>
***/
/*!
* 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>) %u\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;
}
if (iconv(cd, (AST_ICONV_CAST) &args.text, &incount, &buf, &outcount) == (size_t) -1) {
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",
.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");
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