Base64 Encoding encodes and decodes data in Base64 format Base64 is an encoding that allows to encode a sequence of arbitrary bytes as a sequence of printable ASCII characters. For the definition of Base64, see RFC 1421 or RFC 2045. Base64 is most commonly used as a MIME transfer encoding for email. GLib supports incremental encoding using g_base64_encode_step() and g_base64_encode_close(). Incremental decoding can be done with g_base64_decode_step(). To encode or decode data in one go, use g_base64_encode() or g_base64_decode(). Support for Base64 encoding has been added in GLib 2.12. @in: @len: @break_lines: @out: @state: @save: @Returns: @break_lines: @out: @state: @save: @Returns: @data: @len: @Returns: @in: @len: @out: @state: @save: @Returns: @text: @out_len: @Returns: