Index: set_q.c
===================================================================
RCS file: /home/cvsfiles/gmp/mpf/set_q.c,v
retrieving revision 1.5
retrieving revision 1.6
diff c 2 r1.5 r1.6
*** set_q.c 1996/05/24 06:34:29 1.5
 set_q.c 1999/03/14 00:44:22 1.6
***************
*** 24,52 ****
#include "longlong.h"
 /* Algorithm:
 1. Develop >= n bits of src.num / src.den, where n is the number of bits
 in a double. This (partial) division will use all bits from the
 denominator.
 2. Use the remainder to determine how to round the result.
 3. Assign the integral result to a temporary double.
 4. Scale the temporary double, and return the result.

 An alternative algorithm, that would be faster:
 0. Let n be somewhat larger than the number of significant bits in a double.
 1. Extract the most significant n bits of the denominator, and an equal
 number of bits from the numerator.
 2. Interpret the extracted numbers as integers, call them a and b
 respectively, and develop n bits of the fractions ((a + 1) / b) and
 (a / (b + 1)) using mpn_divrem.
 3. If the computed values are identical UP TO THE POSITION WE CARE ABOUT,
 we are done. If they are different, repeat the algorithm from step 1,
 but first let n = n * 2.
 4. If we end up using all bits from the numerator and denominator, fall
 back to the first algorithm above.
 5. Just to make life harder, The computation of a + 1 and b + 1 above
 might give carryout... Needs special handling. It might work to
 subtract 1 in both cases instead.
 */

void
#if __STDC__
 24,27 
***************
*** 133,143 ****
else
{
! nlimb = mpn_lshift (rp, np, nsize, normalization_steps);
}
if (nlimb != 0)
{
rp[rsize] = nlimb;
 rsize++;
exp++;
}
}
 108,122 
else
{
! nlimb = mpn_lshift (rp, np, rsize, normalization_steps);
}
if (nlimb != 0)
{
rp[rsize] = nlimb;
exp++;
+ /* Don't just increase rsize, chop off rp at the low end instead. */
+ if (rsize == prec)
+ rp++;
+ else
+ rsize++;
}
}
***************
*** 165,169 ****
EXP (r) = exp;
! SIZ (r) = qsize;
TMP_FREE (marker);
 144,148 
EXP (r) = exp;
! SIZ (r) = sign_quotient >= 0 ? qsize : qsize;
TMP_FREE (marker);