--- parser3/src/classes/string.C	2015/04/08 18:08:52	1.214
+++ parser3/src/classes/string.C	2015/05/16 22:24:38	1.217
@@ -20,7 +20,7 @@
 #include "pa_vregex.h"
 #include "pa_charsets.h"
 
-volatile const char * IDENT_STRING_C="$Id: string.C,v 1.214 2015/04/08 18:08:52 moko Exp $";
+volatile const char * IDENT_STRING_C="$Id: string.C,v 1.217 2015/05/16 22:24:38 moko Exp $";
 
 // class
 
@@ -153,27 +153,18 @@ static void _bool(Request& r, MethodPara
 
 static void _left(Request& r, MethodParams& params) {
 	ssize_t sn=params.as_int(0, "n must be int", r);
-	if(sn<0)
-		throw Exception(PARSER_RUNTIME,
-			0, 
-			"n(%d) must be >=0", sn);
-	size_t n=(size_t)sn;
-
 	const String& string=GET_SELF(r, VString).string();
-	r.write_assign_lang(string.mid(r.charsets.source(), 0, n));
+	r.write_assign_lang(sn<0 ? string : string.mid(r.charsets.source(), 0, (size_t)sn));
 }
 
 static void _right(Request& r, MethodParams& params) {
-	ssize_t sn=(size_t)params.as_int(0, "n must be int", r);
-	if(sn<0)
-		throw Exception(PARSER_RUNTIME,
-			0, 
-			"n(%d) must be >=0", sn);
-	size_t n=(size_t)sn;
-
-	const String& string=GET_SELF(r, VString).string();
-	size_t length=string.length(r.charsets.source());
-	r.write_assign_lang(n<length?string.mid(r.charsets.source(), length-n, length, length):string);
+	ssize_t sn=params.as_int(0, "n must be int", r);
+	if(sn>0){
+		size_t n=(size_t)sn;
+		const String& string=GET_SELF(r, VString).string();
+		size_t length=string.length(r.charsets.source());
+		r.write_assign_lang(n<length ? string.mid(r.charsets.source(), length-n, length, length) : string);
+	}
 }
 
 static void _mid(Request& r, MethodParams& params) {
@@ -742,6 +733,19 @@ static void _base64(Request& r, MethodPa
 	}
 }
 
+static void _idna(Request& r, MethodParams& params) {
+	if(params.count()) {
+		// decode: ^string:idna[encoded]
+		const char* cstr=params.as_string(0, PARAMETER_MUST_BE_STRING).cstr();
+		r.write_assign_lang(*new String(pa_idna_decode(cstr, r.charsets.source()), String::L_TAINTED));
+	} else {
+		// encode: ^str.idna[]
+		VString& self=GET_SELF(r, VString);
+		const char* cstr=self.string().cstr();
+		r.write_assign_lang(*new String(pa_idna_encode(cstr, r.charsets.source()), String::L_TAINTED));
+	}
+}
+
 static void _escape(Request& r, MethodParams&){
 	const String& src=GET_SELF(r, VString).string();
 	r.write_assign_lang(src.escape(r.charsets.source()));
@@ -823,9 +827,13 @@ MString::MString(): Methoded("string") {
 	add_native_method("trim", Method::CT_DYNAMIC, _trim, 0, 2);
 
 	// ^string.base64[] << encode
-	// ^string:base64[encoded string] << decode	
+	// ^string:base64[encoded string] << decode
 	add_native_method("base64", Method::CT_ANY, _base64, 0, 2);
 
+	// ^string.idna[] << encode
+	// ^string:idna[encoded string] << decode
+	add_native_method("idna", Method::CT_ANY, _idna, 0, 1);
+
 	// ^string.js-escape[]
 	add_native_method("js-escape", Method::CT_ANY, _escape, 0, 0);