ref: ec35f468e0eba87c9f09cbbe5fa8af2591e6f914
dir: /man/2/encoding/
.TH ENCODING 2 .SH NAME Encoding: enc, dec \- encoding and decoding of byte arrays as text .SH SYNOPSIS .EX include "encoding.m"; base16 := load Encoding Encoding->BASE16PATH; base32 := load Encoding Encoding->BASE32PATH; base32a := load Encoding Encoding->BASE32APATH; base64 := load Encoding Encoding->BASE64PATH; enc: fn(a: array of byte): string; dec: fn(s: string): array of byte .EE .SH DESCRIPTION .B Encoding presents a common interface to several ways of encoding binary data (represented in arrays of bytes) as printable text, to be included in essentially textual data (such as XML) or sent through e-mail systems (as in MIME). .PP .B Enc returns a string with a textual encoding of the binary data in .IR a . .PP .B Dec returns an array of bytes containing the binary data encoded in .IR s . .PP Four encodings are provided, including all those defined by RFC3548; load the one required from the given path. .TP .B BASE16PATH Encode in base 16, representing each byte as a pair of hexadecimal digits, using upper-case letters (RFC3548). .TP .B BASE32PATH Encode in base 32, encoding 5 bits per character, using upper-case letters, digits `2' to `7', padded with `=', as per RFC3548. .TP .B BASE32APATH Alternative encoding in base 32, encoding 5 bits per character, using digits `2' to `7', letters (either case) except `l' and `o', not padded. .TP .B BASE64PATH Encode in base 64, encoding 6 bits per character, using upper- and lower-case letters, digits, `+' and `/', padded with `=' (RFC3548). .PP When decoding, white space and illegal characters are ignored; base 16 and base 32 decoders are case-insensitive. .SH SOURCE .B /appl/lib/encoding .SH SEE ALSO .IR convcs (2)