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