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Using array and string arguments

• Getting all UTF8 code points in a standard JavaScript string:

  var string = ...;
  var codepoints = []; utfx.UTF16toUTF8(string, codepoints);

• Decoding an array of UTF8 bytes to UTF8 code points:

  var bytes = [...];
  var codepoints = []; utfx.decodeUTF8(bytes, codepoints);

• Encoding a standard JavaScript string as UTF8 bytes:

  var string = ...;
  var bytes = []; utfx.UTF16toUTF8Bytes(string, bytes);

• Decoding an array of UTF8 bytes to a standard JavaScript string:

  var bytes = [...];
  var string = utfx.UTF8BytesToUTF16(bytes);

Using source and destination functions

• Converting an arbitrary input source of UTF16 characters to an arbitrary output destination of UTF8 code points:

  var string = ..., i = 0;
  utfx.UTF16toUTF8(function() {
      return i < string.length ? string.charCodeAt(i++) : null;
  }, function(cp) {
      ...
  });

• Encoding an arbitrary input source of UTF8 code points to an arbitrary output destination of UTF8 bytes:

  var codepoints = [...], i = 0;
  utfx.encodeUTF8(function() {
      return i < codepoints.length ? codepoints[i++] : null;
  }, function(b) {
      ...
  });