// compiler specific attribute translation
// msvc should come first, so if clang is in msvc mode it gets the right defines
+// NOTE: this will only do checking in msvc with versions that support /analyze
+#if _MSC_VER
+# ifdef _USE_ATTRIBUTES_FOR_SAL
+# undef _USE_ATTRIBUTES_FOR_SAL
+# endif
+# define _USE_ATTRIBUTES_FOR_SAL 1
+# include <sal.h>
+# define FOLLY_PRINTF_FORMAT _Printf_format_string_
+# define FOLLY_PRINTF_FORMAT_ATTR(format_param, dots_param) /**/
+#else
+# define FOLLY_PRINTF_FORMAT /**/
+# define FOLLY_PRINTF_FORMAT_ATTR(format_param, dots_param) \
+ __attribute__((format(printf, format_param, dots_param)))
+#endif
+
// noreturn
#if defined(_MSC_VER)
# define FOLLY_NORETURN __declspec(noreturn)
# define FOLLY_ALWAYS_INLINE
#endif
+// detection for 64 bit
+#if defined(__x86_64__) || defined(_M_X64)
+# define FOLLY_X64 1
+#else
+# define FOLLY_X64 0
+#endif
+
+// packing is very ugly in msvc
+#ifdef _MSC_VER
+# define FOLLY_PACK_ATTR /**/
+# define FOLLY_PACK_PUSH __pragma(pack(push, 1))
+# define FOLLY_PACK_POP __pragma(pack(pop))
+#elif defined(__clang__) || defined(__GNUC__)
+# define FOLLY_PACK_ATTR __attribute__((packed))
+# define FOLLY_PACK_PUSH /**/
+# define FOLLY_PACK_POP /**/
+#else
+# define FOLLY_PACK_ATTR /**/
+# define FOLLY_PACK_PUSH /**/
+# define FOLLY_PACK_POP /**/
+#endif
+
// portable version check
#ifndef __GNUC_PREREQ
# if defined __GNUC__ && defined __GNUC_MINOR__
#endif
#endif // __cplusplus
+// MSVC specific defines
+// mainly for posix compat
+#ifdef _MSC_VER
+
+// this definition is in a really silly place with a silly name
+// and ifdefing it every time we want it is painful
+#include <basetsd.h>
+typedef SSIZE_T ssize_t;
+
+// sprintf semantics are not exactly identical
+// but current usage is not a problem
+# define snprintf _snprintf
+
+// semantics here are identical
+# define strerror_r(errno,buf,len) strerror_s(buf,len,errno)
+
+// compiler specific to compiler specific
+# define __PRETTY_FUNCTION__ __FUNCSIG__
+#endif
+
#endif // FOLLY_PORTABILITY_H_