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author卜部昌平 <shyouhei@ruby-lang.org>2019-12-02 14:58:43 +0900
committer卜部昌平 <shyouhei@ruby-lang.org>2019-12-26 20:45:12 +0900
commit0958e19ffb047781fe1506760c7cbd8d7fe74e57 (patch)
treeca20d9181667d746c6df55c63f595980e9a77fbc /random.c
parent863dbb21d8912c73e84fed47f2d3a1ac5d8275d4 (diff)
add several __has_something macro
With these macros implemented we can write codes just like we can assume the compiler being clang. MSC_VERSION_SINCE is defined to implement those macros, but turned out to be handy for other places. The -fdeclspec compiler flag is necessary for clang to properly handle __has_declspec().
Notes
Notes: Merged: https://github.com/ruby/ruby/pull/2711
Diffstat (limited to 'random.c')
-rw-r--r--random.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/random.c b/random.c
index 68b47bc..d763a21 100644
--- a/random.c
+++ b/random.c
@@ -137,7 +137,7 @@ int_pair_to_real_inclusive(uint32_t a, uint32_t b)
const uint128_t m = ((uint128_t)1 << dig) | 1;
uint128_t x = ((uint128_t)a << 32) | b;
r = (double)(uint64_t)((x * m) >> 64);
-#elif defined HAVE_UINT64_T && !(defined _MSC_VER && _MSC_VER <= 1200)
+#elif defined HAVE_UINT64_T && !MSC_VERSION_BEFORE(1300)
uint64_t x = ((uint64_t)a << dig_u) +
(((uint64_t)b + (a >> dig_u)) >> dig_r64);
r = (double)x;