[cairo-commit] src/cairo-compiler-private.h

[Jeff Muizelaar]

 src/cairo-compiler-private.h |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

New commits:
commit f5167dc2e1a13d8c4e5d66d7178a24b9b5e7ac7a
Author: Jeff Muizelaar <jmuizelaar at mozilla.com>
Date:   Thu May 6 11:43:52 2010 -0400

    Add an implementation of ffs() for MSVC

diff --git a/src/cairo-compiler-private.h b/src/cairo-compiler-private.h
index d257d09..e25ee1f 100644
--- a/src/cairo-compiler-private.h
+++ b/src/cairo-compiler-private.h
@@ -212,6 +212,21 @@
 #ifdef _MSC_VER
 #undef inline
 #define inline __inline
+
+/* Add a definition of ffs */
+#include <intrin.h>
+#pragma intrinsic(_BitScanForward)
+static __forceinline int
+ffs (int x)
+{
+    unsigned long i;
+
+    if (_BitScanForward(&i, x) != 0)
+	return i + 1;
+
+    return 0;
+}
+
 #endif
 
 #if defined(_MSC_VER) && defined(_M_IX86)