96     unsigned char *pos;  in base64_encode()  local
115     pos = out;  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()
125         *pos++ = base64_table[in[0] >> 2];  in base64_encode()
127             *pos++ = base64_table[(in[0] & 0x03) << 4];  in base64_encode()
128             *pos++ = '=';  in base64_encode()
130             *pos++ = base64_table[((in[0] & 0x03) << 4) |  in base64_encode()
132             *pos++ = base64_table[(in[1] & 0x0f) << 2];  in base64_encode()
134         *pos++ = '=';  in base64_encode()
137     *pos = '\0';  in base64_encode()
138     return pos - out;  in base64_encode()
153     unsigned char *pos, block[4], tmp;  in base64_decode()  local
170     pos = out;  in base64_decode()
186             *pos++ = (block[0] << 2) | (block[1] >> 4);  in base64_decode()
187             *pos++ = (block[1] << 4) | (block[2] >> 2);  in base64_decode()
188             *pos++ = (block[2] << 6) | block[3];  in base64_decode()
192                     pos--;  in base64_decode()
194                     pos -= 2;  in base64_decode()
204     return pos - out;  in base64_decode()