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authornobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2013-07-08 14:13:13 +0000
committernobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2013-07-08 14:13:13 +0000
commit3d7fa44b05482818a954e04dfb6e5311e1b790b8 (patch)
tree67a96027fd2ad2f82122e1946f7d731534b53b84 /win32/win32.c
parent9487b2cdfc05b6ee0a739676526067daa59e4e4a (diff)
win32.c: for strict ANSI
* win32/win32.c (rb_w32_pow): move from win32.h and disable strict ANSI mode macro to let _controlfp() stuff defined. [ruby-core:55312] [Bug #8495] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41836 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'win32/win32.c')
-rw-r--r--win32/win32.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/win32/win32.c b/win32/win32.c
index c7ee9844b17..ca834c9f5a0 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -19,6 +19,8 @@
Copyright (C) 2000 Information-technology Promotion Agency, Japan
*/
+#undef __STRICT_ANSI__
+
#include "ruby/ruby.h"
#include "ruby/encoding.h"
#include <fcntl.h>
@@ -6954,3 +6956,21 @@ rb_w32_unwrap_io_handle(int fd)
}
return _close(fd);
}
+
+#if !defined(__MINGW64__) && defined(__MINGW64_VERSION_MAJOR)
+/*
+ * Set floating point precision for pow() of mingw-w64 x86.
+ * With default precision the result is not proper on WinXP.
+ */
+double
+rb_w32_pow(double x, double y)
+{
+ double r;
+ unsigned int default_control = _controlfp(0, 0);
+ _controlfp(_PC_64, _MCW_PC);
+ r = pow(x, y);
+ /* Restore setting */
+ _controlfp(default_control, _MCW_PC);
+ return r;
+}
+#endif