parser.py 文件源码

def pack_logging_topics(event_id, args, expected_topics, context):
    topics = [event_id]
    for pos, expected_topic in enumerate(expected_topics):
        typ = expected_topic.typ
        arg = args[pos]
        value = parse_expr(arg, context)
        if isinstance(typ, ByteArrayType) and (isinstance(arg, ast.Str) or (isinstance(arg, ast.Name) and arg.id not in reserved_words)):
            if value.typ.maxlen > typ.maxlen:
                raise TypeMismatchException("Topic input bytes are to big: %r %r" % (value.typ, typ))
            if isinstance(arg, ast.Str):
                bytez, bytez_length = string_to_bytes(arg.s)
                if len(bytez) > 32:
                    raise InvalidLiteralException("Can only log a maximum of 32 bytes at a time.")
                topics.append(bytes_to_int(bytez + b'\x00' * (32 - bytez_length)))
            else:
                size = context.vars[arg.id].size
                topics.append(byte_array_to_num(value, arg, 'num256', size))
        else:
            value = unwrap_location(value)
            value = base_type_conversion(value, value.typ, typ)
            topics.append(value)
    return topics