2 * UCW Library -- Base 64 Encoding & Decoding
4 * (c) 2002, Robert Spalek <robert@ucw.cz>
6 * This software may be freely distributed and used according to the terms
7 * of the GNU Lesser General Public License.
11 * Encodes @len bytes of data pointed to by @src by base64 encoding.
12 * Stores them in @dest and returns the number of bytes the output
15 uns base64_encode(byte *dest, const byte *src, uns len);
17 * Decodes @len bytes of data pointed to by @src from base64 encoding.
18 * All invalid characters are ignored. The result is stored into @dest
19 * and length of the result is returned.
21 uns base64_decode(byte *dest, const byte *src, uns len);
24 * Use this macro to calculate @base64_encode() output buffer size.
26 #define BASE64_ENC_LENGTH(x) (((x)+2)/3 *4)
29 * When called for BASE64_IN_CHUNK-byte chunks, the result will be
30 * always BASE64_OUT_CHUNK bytes long. If a longer block is split
31 * to such chunks, the result will be identical.
33 #define BASE64_IN_CHUNK 3 /** Size of chunk on the un-encoded side. **/
34 #define BASE64_OUT_CHUNK 4 /** Size of chunk on the encoded side. **/