# Source code for canlib.kvlclib.writerformat

    import ctypes as ct

    from .. import deprecation
    from .enums import FileFormat
    from .properties import _PROPERTY_TYPE
    from .wrapper import dll

    def writer_formats():
        """Return a generator of all writer formats.

        .. versionadded:: 1.7

        """
        id_ = ct.c_int()
        dll.kvlcGetFirstWriterFormat(ct.byref(id_))
        while id_.value != FileFormat.INVALID:
            yield WriterFormat(FileFormat(id_.value))
            previous_id = id_.value
            dll.kvlcGetNextWriterFormat(previous_id, ct.byref(id_))

    class WriterFormat(object):
        """Helper class that encapsulates a Writer.

        You may list available Writers using::

            for format in kvlclib.writer_formats():
                print(format)

        """

        @classmethod
        @deprecation.deprecated.favour("kvlclib.writer_formats")
        def getFirstWriterFormat(cls):
            """Get the first supported output format."""
            id_ = ct.c_int()
            dll.kvlcGetFirstWriterFormat(ct.byref(id_))
            return FileFormat(id_.value)

        @classmethod
        @deprecation.deprecated.favour("kvlclib.writer_formats")
        def getNextWriterFormat(cls, previous_id):
            """Get the next supported output format."""
            id_ = ct.c_int()
            dll.kvlcGetNextWriterFormat(previous_id, ct.byref(id_))
            return FileFormat(id_.value)

        def __init__(self, id_):
            self.id_ = id_
            self.name = "Unknown name"
            self.extension = "Unknown extension"
            self.description = "Unknown description"

            text = ct.create_string_buffer(256)
            text_len = ct.c_int(ct.sizeof(text))
            dll.kvlcGetWriterName(self.id_, text, text_len)
            self.name = text.value.decode('utf-8')

            text_len = ct.c_int(ct.sizeof(text))
            dll.kvlcGetWriterExtension(self.id_, text, text_len)
            self.extension = text.value.decode('utf-8')

            text_len = ct.c_int(ct.sizeof(text))
            dll.kvlcGetWriterDescription(self.id_, text, text_len)
            self.description = text.value.decode('utf-8')

        def __repr__(self):
            text = "WriterFormat({!r})".format(self.id_)
            return text

        def __str__(self):
            text = "%4d: %s (.%s)" % (self.id_, self.name, self.extension)
            text += " Writer "
            text += ", %s" % self.description
            return text

        def isPropertySupported(self, wr_property):
            """Check if specified write property is supported.

            Retuns True if the property is supported by output format.

            Args:
                wr_property (`canlib.kvlclib.Property`): Writer property

            Returns:
                `bool`
            """
            supported = ct.c_int()
            # Backward compatibility with deprecated kvlclib.PROPERTY_XXX
            if isinstance(wr_property, dict):
                wr_property = wr_property['value']
            dll.kvlcIsPropertySupported(self.id_, wr_property, ct.byref(supported))
            return bool(supported.value)

        def getPropertyDefault(self, wr_property):
            """Get default value for property."""
            if wr_property is None:
                buf = ct.c_bool()
            else:
                # Backward compatibility with deprecated kvlclib.PROPERTY_XXX
                if isinstance(wr_property, dict):
                    buf = wr_property['type']
                    wr_property = wr_property['value']
                else:
                    buf = _PROPERTY_TYPE[wr_property]()
            dll.kvlcGetWriterPropertyDefault(self.id_, wr_property, ct.byref(buf), ct.sizeof(buf))
            return buf.value