Also implement buffer toString in asc

bin/asc.js

@@ -836,7 +836,8 @@ function createMemoryStream(fn) {
     return buffer;
   };
   stream.toString = function() {
-    return this.toBuffer().toString("utf8");
+    var buffer = this.toBuffer();
+    return utf8.read(buffer, 0, buffer.length);
   };
   return stream;
 }

bin/util/utf8.js

@@ -19,6 +19,38 @@ exports.length = function utf8_length(string) {
   return len;
 };
 
+exports.read = function utf8_read(buffer, start, end) {
+  var len = end - start;
+  if (len < 1)
+    return "";
+  var parts = null,
+    chunk = [],
+    i = 0, t;
+  while (start < end) {
+    t = buffer[start++];
+    if (t < 128) {
+      chunk[i++] = t;
+    } else if (t > 191 && t < 224) {
+      chunk[i++] = (t & 31) << 6 | buffer[start++] & 63;
+    } else if (t > 239 && t < 365) {
+      t = ((t & 7) << 18 | (buffer[start++] & 63) << 12 | (buffer[start++] & 63) << 6 | buffer[start++] & 63) - 0x10000;
+      chunk[i++] = 0xD800 + (t >> 10);
+      chunk[i++] = 0xDC00 + (t & 1023);
+    } else {
+      chunk[i++] = (t & 15) << 12 | (buffer[start++] & 63) << 6 | buffer[start++] & 63;
+    }
+    if (i > 8191) {
+      (parts || (parts = [])).push(String.fromCharCode.apply(String, chunk));
+      i = 0;
+    }
+  }
+  if (parts) {
+    if (i) parts.push(String.fromCharCode.apply(String, chunk.slice(0, i)));
+    return parts.join("");
+  }
+  return String.fromCharCode.apply(String, chunk.slice(0, i));
+};
+
 exports.write = function utf8_write(string, buffer, offset) {
   var start = offset,
       c1, c2;