97     const unsigned char *end, *in;  in base64_encode()  local
114     in = src;  in base64_encode()
116     while (end - in >= 3) {  in base64_encode()
117         *pos++ = base64_table[in[0] >> 2];  in base64_encode()
118         *pos++ = base64_table[((in[0] & 0x03) << 4) | (in[1] >> 4)];  in base64_encode()
119         *pos++ = base64_table[((in[1] & 0x0f) << 2) | (in[2] >> 6)];  in base64_encode()
120         *pos++ = base64_table[in[2] & 0x3f];  in base64_encode()
121         in += 3;  in base64_encode()
124     if (end - in) {  in base64_encode()
125         *pos++ = base64_table[in[0] >> 2];  in base64_encode()
126         if (end - in == 1) {  in base64_encode()
127             *pos++ = base64_table[(in[0] & 0x03) << 4];  in base64_encode()
130             *pos++ = base64_table[((in[0] & 0x03) << 4) |  in base64_encode()
131                           (in[1] >> 4)];  in base64_encode()
132             *pos++ = base64_table[(in[1] & 0x0f) << 2];  in base64_encode()