view release on metacpan or  search on metacpan

src/encoding.c  view on Meta::CPAN

    if (acc_len > 0) {
        *dst++ = (char)b64_byte_to_char((acc << (6 - acc_len)) & 0x3F);
    }
    *dst++ = 0;
    return olen;
}

/*
 * Decode Base64 chars into bytes. The '*dst_len' value must initially
 * contain the length of the output buffer '*dst'; when the decoding
 * ends, the actual number of decoded bytes is written back in
 * '*dst_len'.
 *
 * Decoding stops when a non-Base64 character is encountered, or when
 * the output buffer capacity is exceeded. If an error occurred (output
 * buffer is too small, invalid last characters leading to unprocessed
 * buffered bits), then NULL is returned; otherwise, the returned value
 * points to the first non-Base64 character in the source stream, which
 * may be the terminating zero.
 */
static const char *from_base64(void *dst, size_t *dst_len, const char *src) {