diff options
Diffstat (limited to 'src/3rdparty/webkit/JavaScriptCore/wtf/StdLibExtras.h')
| -rw-r--r-- | src/3rdparty/webkit/JavaScriptCore/wtf/StdLibExtras.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/3rdparty/webkit/JavaScriptCore/wtf/StdLibExtras.h b/src/3rdparty/webkit/JavaScriptCore/wtf/StdLibExtras.h index c9b5742..96a929c 100644 --- a/src/3rdparty/webkit/JavaScriptCore/wtf/StdLibExtras.h +++ b/src/3rdparty/webkit/JavaScriptCore/wtf/StdLibExtras.h @@ -26,7 +26,6 @@ #ifndef WTF_StdLibExtras_h #define WTF_StdLibExtras_h -#include <wtf/Platform.h> #include <wtf/Assertions.h> // Use these to declare and define a static local variable (static T;) so that @@ -48,6 +47,10 @@ // NULL can cause compiler problems, especially in cases of multiple inheritance. #define OBJECT_OFFSETOF(class, field) (reinterpret_cast<ptrdiff_t>(&(reinterpret_cast<class*>(0x4000)->field)) - 0x4000) +// STRINGIZE: Can convert any value to quoted string, even expandable macros +#define STRINGIZE(exp) #exp +#define STRINGIZE_VALUE_OF(exp) STRINGIZE(exp) + namespace WTF { /* @@ -65,6 +68,14 @@ namespace WTF { return u.to; } + // Returns a count of the number of bits set in 'bits'. + inline size_t bitCount(unsigned bits) + { + bits = bits - ((bits >> 1) & 0x55555555); + bits = (bits & 0x33333333) + ((bits >> 2) & 0x33333333); + return (((bits + (bits >> 4)) & 0xF0F0F0F) * 0x1010101) >> 24; + } + } // namespace WTF #endif |