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GNU Info (elisp)Base 64Base 64 Encoding ================ Base 64 code is used in email to encode a sequence of 8-bit bytes as a longer sequence of ASCII graphic characters. It is defined in Internet RFC(1)2045. This section describes the functions for converting to and from this code. - Function: base64-encode-region beg end &optional no-line-break This function converts the region from BEG to END into base 64 code. It returns the length of the encoded text. An error is signaled if a character in the region is multibyte, i.e. in a multibyte buffer the region must contain only characters from the charsets `ascii', `eight-bit-control' and `eight-bit-graphic'. Normally, this function inserts newline characters into the encoded text, to avoid overlong lines. However, if the optional argument NO-LINE-BREAK is non-`nil', these newlines are not added, so the output is just one long line. - Function: base64-encode-string string &optional no-line-break This function converts the string STRING into base 64 code. It returns a string containing the encoded text. As for `base64-encode-region', an error is signaled if a character in the string is multibyte. Normally, this function inserts newline characters into the encoded text, to avoid overlong lines. However, if the optional argument NO-LINE-BREAK is non-`nil', these newlines are not added, so the result string is just one long line. - Function: base64-decode-region beg end This function converts the region from BEG to END from base 64 code into the corresponding decoded text. It returns the length of the decoded text. The decoding functions ignore newline characters in the encoded text. - Function: base64-decode-string string This function converts the string STRING from base 64 code into the corresponding decoded text. It returns a string containing the decoded text. The decoding functions ignore newline characters in the encoded text. ---------- Footnotes ---------- (1) An RFC, an acronym for "Request for Comments", is a numbered Internet informational document describing a standard. RFCs are usually written by technical experts acting on their own initiative, and are traditionally written in a pragmatic, experience-driven manner. automatically generated by info2www version 1.2.2.9 |