.TH base64 3erl "stdlib 3.14" "Ericsson AB" "Erlang Module Definition"
.SH NAME
base64 \- Provides base64 encode and decode, see
    RFC 2045.
.SH DESCRIPTION
.LP
Provides base64 encode and decode, see RFC 2045\&.
.SH DATA TYPES
.nf

\fBascii_string()\fR\& = [1\&.\&.255]
.br
.fi
.nf

\fBascii_binary()\fR\& = binary()
.br
.fi
.RS
.LP
A \fIbinary()\fR\& with ASCII characters in the range 1 to 255\&.
.RE

.SH EXPORTS
.LP
.nf

.B
decode(Base64) -> Data
.br
.fi
.br
.nf

.B
decode_to_string(Base64) -> DataString
.br
.fi
.br
.nf

.B
mime_decode(Base64) -> Data
.br
.fi
.br
.nf

.B
mime_decode_to_string(Base64) -> DataString
.br
.fi
.br
.RS
.LP
Types:

.RS 3
Base64 = ascii_string() | ascii_binary()
.br
Data = ascii_binary()
.br
DataString = ascii_string()
.br
.RE
.RE
.RS
.LP
Decodes a base64-encoded string to plain ASCII\&. See RFC 4648\&.
.LP
\fImime_decode/1\fR\& and \fImime_decode_to_string/1\fR\& strip away illegal characters, while \fIdecode/1\fR\& and \fIdecode_to_string/1\fR\& only strip away whitespace characters\&.
.RE

.LP
.nf

.B
encode(Data) -> Base64
.br
.fi
.br
.nf

.B
encode_to_string(Data) -> Base64String
.br
.fi
.br
.RS
.LP
Types:

.RS 3
Data = ascii_string() | ascii_binary()
.br
Base64 = ascii_binary()
.br
Base64String = ascii_string()
.br
.RE
.RE
.RS
.LP
Encodes a plain ASCII string into base64\&. The result is 33% larger than the data\&.
.RE