diff options
-rw-r--r-- | ChangeLog | 4 | ||||
-rw-r--r-- | bignum.c | 4 | ||||
-rw-r--r-- | version.h | 2 |
3 files changed, 8 insertions, 2 deletions
@@ -1,3 +1,7 @@ +Thu Aug 16 06:26:58 2007 Nobuyoshi Nakada <nobu@ruby-lang.org> + + * bignum.c (rb_big_pow): refine overflow check. [ruby-dev:31242] + Thu Aug 16 06:25:48 2007 Yukihiro Matsumoto <matz@ruby-lang.org> * time.c (time_succ): Time#succ should return a time object in the @@ -1611,8 +1611,10 @@ rb_big_pow(x, y) yy = FIX2LONG(y); if (yy > 0) { VALUE z = x; + const long BIGLEN_LIMIT = 1024*1024 / SIZEOF_BDIGITS; - if (RBIGNUM(x)->len * SIZEOF_BDIGITS * yy > 1024*1024) { + if ((RBIGNUM(x)->len > BIGLEN_LIMIT) || + (RBIGNUM(x)->len > BIGLEN_LIMIT / yy)) { rb_warn("in a**b, b may be too big"); d = (double)yy; break; @@ -2,7 +2,7 @@ #define RUBY_RELEASE_DATE "2007-08-16" #define RUBY_VERSION_CODE 185 #define RUBY_RELEASE_CODE 20070816 -#define RUBY_PATCHLEVEL 78 +#define RUBY_PATCHLEVEL 79 #define RUBY_VERSION_MAJOR 1 #define RUBY_VERSION_MINOR 8 |