diff options
Diffstat (limited to 'src/common/compat.h')
| -rw-r--r-- | src/common/compat.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/common/compat.h b/src/common/compat.h index 9c544fa309..86ea0c41d4 100644 --- a/src/common/compat.h +++ b/src/common/compat.h @@ -132,6 +132,17 @@ extern INLINE double U64_TO_DBL(uint64_t x) { #define DBL_TO_U64(x) ((uint64_t) (x)) #endif +#if defined(_MSC_VER) +/* XXXX024 we should instead have a more general check for "Is enum signed?"*/ +#define ENUM_BF(t) unsigned +#else +/** Wrapper for having a bitfield of an enumerated type. Where possible, we + * just use the enumerated type (so the compiler can help us and notice + * problems), but if enumerated types are unsigned, we must use unsigned, + * so that the loss of precision doesn't make large values negative. */ +#define ENUM_BF(t) t +#endif + /* GCC has several useful attributes. */ #if defined(__GNUC__) && __GNUC__ >= 3 #define ATTR_NORETURN __attribute__((noreturn)) |