parameters: (field_number, is_repeated, is_packed, key, new_default)
docstring: Returns a decoder for a string field.
docstring_summary: Returns a decoder for a string field.
docstring_tokens: Returns a decoder for a string field .
function: def StringDecoder(field_number, is_repeated, is_packed, key, new_default):
    """Returns a decoder for a string field."""
  
    local_DecodeVarint = _DecodeVarint
    local_unicode = unicode
  
    assert not is_packed
    if is_repeated:
      tag_bytes = encoder.TagBytes(field_number,
                                   wire_format.WIRETYPE_LENGTH_DELIMITED)
      tag_len = len(tag_bytes)
      def DecodeRepeatedField(buffer, pos, end, message, field_dict):
        value = field_dict.get(key)
        if value is None:
          value = field_dict.setdefault(key, new_default(message))
        while 1:
          (size, pos) = local_DecodeVarint(buffer, pos)
          new_pos = pos + size
          if new_pos > end:
            raise _DecodeError('Truncated string.')
          value.append(local_unicode(buffer[pos:new_pos], 'utf-8'))
          # Predict that the next tag is another copy of the same repeated field.
          pos = new_pos + tag_len
          if buffer[new_pos:pos] != tag_bytes or new_pos == end:
            # Prediction failed.  Return.
            return new_pos
      return DecodeRepeatedField
    else:
      def DecodeField(buffer, pos, end, message, field_dict):
        (size, pos) = local_DecodeVarint(buffer, pos)
        new_pos = pos + size
        if new_pos > end:
          raise _DecodeError('Truncated string.')
        field_dict[key] = local_unicode(buffer[pos:new_pos], 'utf-8')
        return new_pos
      return DecodeField
function_tokens: def StringDecoder ( field_number , is_repeated , is_packed , key , new_default ) : local_DecodeVarint = _DecodeVarint local_unicode = unicode assert not is_packed if is_repeated : tag_bytes = encoder . TagBytes ( field_number , wire_format . WIRETYPE_LENGTH_DELIMITED ) tag_len = len ( tag_bytes ) def DecodeRepeatedField ( buffer , pos , end , message , field_dict ) : value = field_dict . get ( key ) if value is None : value = field_dict . setdefault ( key , new_default ( message ) ) while 1 : ( size , pos ) = local_DecodeVarint ( buffer , pos ) new_pos = pos + size if new_pos > end : raise _DecodeError ( 'Truncated string.' ) value . append ( local_unicode ( buffer [ pos : new_pos ] , 'utf-8' ) ) # Predict that the next tag is another copy of the same repeated field. pos = new_pos + tag_len if buffer [ new_pos : pos ] != tag_bytes or new_pos == end : # Prediction failed.  Return. return new_pos return DecodeRepeatedField else : def DecodeField ( buffer , pos , end , message , field_dict ) : ( size , pos ) = local_DecodeVarint ( buffer , pos ) new_pos = pos + size if new_pos > end : raise _DecodeError ( 'Truncated string.' ) field_dict [ key ] = local_unicode ( buffer [ pos : new_pos ] , 'utf-8' ) return new_pos return DecodeField