diff options
author | matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2002-10-04 17:54:29 +0000 |
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committer | matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2002-10-04 17:54:29 +0000 |
commit | a2c9020808417572521c711cf4ad9a3c7b556575 (patch) | |
tree | 421344d18596a3c8c3d998e41fcf848ac54a5054 /bignum.c | |
parent | 1e3062ede1765f21c501068b3489c390c914e55f (diff) |
* bignum.c (rb_big_rshift): num should be initialized by carry
bits if x is negative.
* bignum.c (bigdivmod): len for bignum zero is 1, not 0.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2936 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'bignum.c')
-rw-r--r-- | bignum.c | 6 |
1 files changed, 5 insertions, 1 deletions
@@ -1243,7 +1243,8 @@ bigdivmod(x, y, divp, modp) VALUE mod; bigdivrem(x, y, divp, &mod); - if (RBIGNUM(x)->sign != RBIGNUM(y)->sign && RBIGNUM(mod)->len > 0) { + if (RBIGNUM(x)->sign != RBIGNUM(y)->sign && + RBIGNUM(mod)->len > 0 && BDIGITS(mod)[0] != 0) { if (divp) *divp = bigadd(*divp, rb_int2big(1), 0); if (modp) *modp = bigadd(mod, y, 1); } @@ -1603,6 +1604,9 @@ rb_big_rshift(x, y) xds = BDIGITS(x); i = RBIGNUM(x)->len; j = i - s1; z = bignew(j, RBIGNUM(x)->sign); + if (!RBIGNUM(x)->sign) { + num = ((BDIGIT_DBL)~0) << BITSPERDIG; + } zds = BDIGITS(z); while (i--, j--) { num = (num | xds[i]) >> s2; |