Add getEncoder/getDecoder to typescript definitions. Fixes #229

Author: ashtuchkin

lib/index.d.ts

@@ -6,19 +6,36 @@
  *--------------------------------------------------------------------------------------------*/
 
 declare module 'iconv-lite' {
+	// Basic API
 	export function decode(buffer: Buffer, encoding: string, options?: Options): string;
 
 	export function encode(content: string, encoding: string, options?: Options): Buffer;
 
 	export function encodingExists(encoding: string): boolean;
 
+	// Stream API
 	export function decodeStream(encoding: string, options?: Options): NodeJS.ReadWriteStream;
 
 	export function encodeStream(encoding: string, options?: Options): NodeJS.ReadWriteStream;
+
+	// Low-level stream APIs
+	export function getEncoder(encoding: string, options?: Options): EncoderStream;
+
+	export function getDecoder(encoding: string, options?: Options): DecoderStream;
 }
 
 export interface Options {
     stripBOM?: boolean;
     addBOM?: boolean;
     defaultEncoding?: string;
 }
+
+export interface EncoderStream {
+	write(str: string): Buffer;
+	end(): Buffer | undefined;
+}
+
+export interface DecoderStream {
+	write(buf: Buffer): string;
+	end(): string | undefined;
+}