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Fixing bug in subtraction of a ratio with a bignum numerator.

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Alex Shinn 2014-01-20 21:57:13 +09:00
parent b8b821e75a
commit 297e8727cb
1 changed files with 2 additions and 0 deletions
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2
bignum.c
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@ -1212,6 +1212,8 @@ sexp sexp_sub (sexp ctx, sexp a, sexp b) {
/* ... FALLTHROUGH ... */
case SEXP_NUM_RAT_RAT:
tmp2 = sexp_make_ratio(ctx, sexp_ratio_numerator(b), sexp_ratio_denominator(b));
if (sexp_bignump(sexp_ratio_numerator(tmp2)))
sexp_ratio_numerator(tmp2) = sexp_copy_bignum(ctx, NULL, sexp_ratio_numerator(tmp2), 0);
sexp_negate_exact(sexp_ratio_numerator(tmp2));
r = sexp_ratio_add(ctx, a, tmp2);
if (negatep) {