Issue 7021 - Add ICONV function for converting between character sets

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@66278 f38db490-d61c-443f-a65b-d21fe96a405b
2007-05-28 15:59:17 +00:00 · 2007-05-28 15:59:17 +00:00 · a46c4c5619
parent 6dd16e4ff4
commit a46c4c5619
1 changed files with 125 additions and 0 deletions
--- a/funcs/func_iconv.c
+++ b/funcs/func_iconv.c
@ -0,0 +1,125 @@
+/*
+ * 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"
+
+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);
+
+	if (option_debug)
+		ast_log(LOG_DEBUG, "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, &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",
+	.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");
+