+ }
+ else if (*where == '\200' /* positive base-256 */
+ || *where == '\377' /* negative base-256 */)
+ {
+ /* Parse base-256 output. A nonnegative number N is
+ represented as (256**DIGS)/2 + N; a negative number -N is
+ represented as (256**DIGS) - N, i.e. as two's complement.
+ The representation guarantees that the leading bit is
+ always on, so that we don't confuse this format with the
+ others (assuming ASCII bytes of 8 bits or more). */
+ int signbit = *where & (1 << (LG_256 - 2));
+ uintmax_t topbits = (((uintmax_t) - signbit)
+ << (CHAR_BIT * sizeof (uintmax_t)
+ - LG_256 - (LG_256 - 2)));
+ value = (*where++ & ((1 << (LG_256 - 2)) - 1)) - signbit;
+ for (;;)