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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/branches/ruby_1_8@10880 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
matz 2006-09-07 16:35:59 +00:00
parent a5913ab9ff
commit b2b33db355
3 changed files with 15 additions and 8 deletions
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11
ChangeLog
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@ -24,6 +24,17 @@ Tue Sep 5 05:49:41 2006 Nobuyoshi Nakada <nobu@ruby-lang.org>
* file.c (path_check_0): check if sticky bit is set on parent
directories for executable path. fixed: [ruby-dev:29415]
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>
* time.c (time_to_s): make it conform to RFC2822 date format.

2
bignum.c
View file

@ -1617,8 +1617,10 @@ rb_big_pow(x, y)
while (yy % 2 == 0) {
yy /= 2;
x = rb_big_mul(x, x);
if (!BDIGITS(x)[RBIGNUM(x)->len-1]) RBIGNUM(x)->len--;
}
z = rb_big_mul(z, x);
if (!BDIGITS(z)[RBIGNUM(z)->len-1]) RBIGNUM(z)->len--;
}
return bignorm(z);
}

10
numeric.c
View file

@ -1982,11 +1982,8 @@ fix_plus(x, y)
a = FIX2LONG(x);
b = FIX2LONG(y);
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;
}
if (TYPE(y) == T_FLOAT) {
@ -2015,11 +2012,8 @@ fix_minus(x, y)
a = FIX2LONG(x);
b = FIX2LONG(y);
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;
}
if (TYPE(y) == T_FLOAT) {