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* numeric.c (fix_plus): addition in Fixnum will never overflow

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long.  a patch from Ondrej Bilka <neleai at seznam.cz>.
  [ruby-core:08794]

* numeric.c (fix_minus): ditto.

* bignum.c (rb_big_pow): eagerly truncate resulting bignum.
  [ruby-core:08794]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@10862 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
matz 2006-09-04 20:10:45 +00:00
parent bedda2d27f
commit 5f61a22950
3 changed files with 15 additions and 8 deletions
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11
ChangeLog
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@ -1,3 +1,14 @@
Tue Sep 5 05:03:46 2006 Yukihiro Matsumoto <matz@ruby-lang.org>
* numeric.c (fix_plus): addition in Fixnum will never overflow
long. a patch from Ondrej Bilka <neleai at seznam.cz>.
[ruby-core:08794]
* numeric.c (fix_minus): ditto.
* bignum.c (rb_big_pow): eagerly truncate resulting bignum.
[ruby-core:08794]
Mon Sep 4 23:15:34 2006 Yukihiro Matsumoto <matz@ruby-lang.org> Mon Sep 4 23:15:34 2006 Yukihiro Matsumoto <matz@ruby-lang.org>
* time.c (time_to_s): make it conform to RFC2822 date format. * time.c (time_to_s): make it conform to RFC2822 date format.

2
bignum.c
View file

@ -1553,8 +1553,10 @@ rb_big_pow(VALUE x, VALUE y)
while (yy % 2 == 0) { while (yy % 2 == 0) {
yy /= 2; yy /= 2;
x = rb_big_mul0(x, x); x = rb_big_mul0(x, x);
if (!BDIGITS(x)[RBIGNUM(x)->len-1]) RBIGNUM(x)->len--;
} }
z = rb_big_mul0(z, x); z = rb_big_mul0(z, x);
if (!BDIGITS(z)[RBIGNUM(z)->len-1]) RBIGNUM(z)->len--;
} }
return bignorm(z); return bignorm(z);
} }

10
numeric.c
View file

@ -1908,11 +1908,8 @@ fix_plus(VALUE x, VALUE y)
a = FIX2LONG(x); a = FIX2LONG(x);
b = FIX2LONG(y); b = FIX2LONG(y);
c = a + b; c = a + b;
r = LONG2FIX(c); r = LONG2NUM(c);
if (FIX2LONG(r) != c) {
r = rb_big_plus(rb_int2big(a), rb_int2big(b));
}
return r; return r;
} }
switch (TYPE(y)) { switch (TYPE(y)) {
@ -1944,11 +1941,8 @@ fix_minus(VALUE x, VALUE y)
a = FIX2LONG(x); a = FIX2LONG(x);
b = FIX2LONG(y); b = FIX2LONG(y);
c = a - b; c = a - b;
r = LONG2FIX(c); r = LONG2NUM(c);
if (FIX2LONG(r) != c) {
r = rb_big_minus(rb_int2big(a), rb_int2big(b));
}
return r; return r;
} }
switch (TYPE(y)) { switch (TYPE(y)) {