diff options
author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-04-13 06:00:49 +0000 |
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committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-04-13 06:00:49 +0000 |
commit | 5d8c8b46bb763e2c4cdf68079b9eaede860be5b7 (patch) | |
tree | 78443a4f2573a2d43393e57262548a37973deae1 /random.c | |
parent | 5ee43b0a94d2743f97cdee5e83e6093243af7559 (diff) |
* random.c (make_seed_value): fix leading-zero-guard condition on
bdigit is smaller than 32bit.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27328 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'random.c')
-rw-r--r-- | random.c | 11 |
1 files changed, 9 insertions, 2 deletions
@@ -516,18 +516,25 @@ fill_random_seed(unsigned int seed[DEFAULT_SEED_CNT]) static VALUE make_seed_value(const void *ptr) { + const long len = DEFAULT_SEED_LEN/SIZEOF_BDIGITS; BDIGIT *digits; NEWOBJ(big, struct RBignum); OBJSETUP(big, rb_cBignum, T_BIGNUM); RBIGNUM_SET_SIGN(big, 1); - rb_big_resize((VALUE)big, DEFAULT_SEED_LEN / SIZEOF_BDIGITS + 1); + rb_big_resize((VALUE)big, len + 1); digits = RBIGNUM_DIGITS(big); MEMCPY(digits, ptr, char, DEFAULT_SEED_LEN); /* set leading-zero-guard if need. */ - digits[RBIGNUM_LEN(big)-1] = digits[RBIGNUM_LEN(big)-2] <= 1 ? 1 : 0; + digits[len] = +#if SIZEOF_INT32 / SIZEOF_BDIGITS > 1 + digits[len-2] <= 1 && digits[len-1] == 0 +#else + digits[len-1] <= 1 +#endif + ? 1 : 0; return rb_big_norm((VALUE)big); } |