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random.c: suppress a warning

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* random.c (random_ulong_limited): suppress a shift count warning
  when unsigned long is 32bits.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55006 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-05-15 03:03:45 +00:00
parent 5cb5692ac8
commit 9529e46adf
1 changed files with 5 additions and 1 deletions
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6
random.c
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@ -991,7 +991,11 @@ random_ulong_limited(VALUE obj, rb_random_t *rnd, unsigned long limit)
const int w = sizeof(limit) * CHAR_BIT - nlz_long(limit);
const int n = w > 32 ? sizeof(unsigned long) : sizeof(uint32_t);
const unsigned long mask = ~(~0UL << w);
const unsigned long full = ~(~0UL << n * CHAR_BIT);
const unsigned long full =
#if SIZEOF_LONG == 4
(size_t)n >= sizeof(unsigned long) ? ~0UL :
#endif
~(~0UL << n * CHAR_BIT);
unsigned long val, bits = 0, rest = 0;
do {
if (mask & ~rest) {