Refactor _LIBCPP_<LITTLE|BIG>_ENDIAN
Previously this macro used 0/1 to indicate if it was set.
This is unlike all other libc++ configuration macros which
use ifdef/ifndef.
This patch makes this macro consistent with everything else.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@315995 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/__config b/include/__config
index b5b1fd5..d621723 100644
--- a/include/__config
+++ b/include/__config
@@ -184,36 +184,30 @@
#ifdef __LITTLE_ENDIAN__
#if __LITTLE_ENDIAN__
-#define _LIBCPP_LITTLE_ENDIAN 1
-#define _LIBCPP_BIG_ENDIAN 0
+#define _LIBCPP_LITTLE_ENDIAN
#endif // __LITTLE_ENDIAN__
#endif // __LITTLE_ENDIAN__
#ifdef __BIG_ENDIAN__
#if __BIG_ENDIAN__
-#define _LIBCPP_LITTLE_ENDIAN 0
-#define _LIBCPP_BIG_ENDIAN 1
+#define _LIBCPP_BIG_ENDIAN
#endif // __BIG_ENDIAN__
#endif // __BIG_ENDIAN__
#ifdef __BYTE_ORDER__
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-#define _LIBCPP_LITTLE_ENDIAN 1
-#define _LIBCPP_BIG_ENDIAN 0
+#define _LIBCPP_LITTLE_ENDIAN
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-#define _LIBCPP_LITTLE_ENDIAN 0
-#define _LIBCPP_BIG_ENDIAN 1
+#define _LIBCPP_BIG_ENDIAN
#endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
#endif // __BYTE_ORDER__
#ifdef __FreeBSD__
# include <sys/endian.h>
# if _BYTE_ORDER == _LITTLE_ENDIAN
-# define _LIBCPP_LITTLE_ENDIAN 1
-# define _LIBCPP_BIG_ENDIAN 0
+# define _LIBCPP_LITTLE_ENDIAN
# else // _BYTE_ORDER == _LITTLE_ENDIAN
-# define _LIBCPP_LITTLE_ENDIAN 0
-# define _LIBCPP_BIG_ENDIAN 1
+# define _LIBCPP_BIG_ENDIAN
# endif // _BYTE_ORDER == _LITTLE_ENDIAN
# ifndef __LONG_LONG_SUPPORTED
# define _LIBCPP_HAS_NO_LONG_LONG
@@ -223,19 +217,16 @@
#ifdef __NetBSD__
# include <sys/endian.h>
# if _BYTE_ORDER == _LITTLE_ENDIAN
-# define _LIBCPP_LITTLE_ENDIAN 1
-# define _LIBCPP_BIG_ENDIAN 0
+# define _LIBCPP_LITTLE_ENDIAN
# else // _BYTE_ORDER == _LITTLE_ENDIAN
-# define _LIBCPP_LITTLE_ENDIAN 0
-# define _LIBCPP_BIG_ENDIAN 1
+# define _LIBCPP_BIG_ENDIAN
# endif // _BYTE_ORDER == _LITTLE_ENDIAN
# define _LIBCPP_HAS_QUICK_EXIT
#endif // __NetBSD__
#if defined(_WIN32)
# define _LIBCPP_WIN32API
-# define _LIBCPP_LITTLE_ENDIAN 1
-# define _LIBCPP_BIG_ENDIAN 0
+# define _LIBCPP_LITTLE_ENDIAN
# define _LIBCPP_SHORT_WCHAR 1
// Both MinGW and native MSVC provide a "MSVC"-like enviroment
# define _LIBCPP_MSVCRT_LIKE
@@ -265,11 +256,9 @@
#ifdef __sun__
# include <sys/isa_defs.h>
# ifdef _LITTLE_ENDIAN
-# define _LIBCPP_LITTLE_ENDIAN 1
-# define _LIBCPP_BIG_ENDIAN 0
+# define _LIBCPP_LITTLE_ENDIAN
# else
-# define _LIBCPP_LITTLE_ENDIAN 0
-# define _LIBCPP_BIG_ENDIAN 1
+# define _LIBCPP_BIG_ENDIAN
# endif
#endif // __sun__
@@ -290,18 +279,16 @@
# define _LIBCPP_USING_DEV_RANDOM
#endif
-#if !defined(_LIBCPP_LITTLE_ENDIAN) || !defined(_LIBCPP_BIG_ENDIAN)
+#if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
# include <endian.h>
# if __BYTE_ORDER == __LITTLE_ENDIAN
-# define _LIBCPP_LITTLE_ENDIAN 1
-# define _LIBCPP_BIG_ENDIAN 0
+# define _LIBCPP_LITTLE_ENDIAN
# elif __BYTE_ORDER == __BIG_ENDIAN
-# define _LIBCPP_LITTLE_ENDIAN 0
-# define _LIBCPP_BIG_ENDIAN 1
+# define _LIBCPP_BIG_ENDIAN
# else // __BYTE_ORDER == __BIG_ENDIAN
# error unable to determine endian
# endif
-#endif // !defined(_LIBCPP_LITTLE_ENDIAN) || !defined(_LIBCPP_BIG_ENDIAN)
+#endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
#if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC)
#define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi")))
diff --git a/include/string b/include/string
index 7775587..acd2876 100644
--- a/include/string
+++ b/include/string
@@ -670,7 +670,7 @@
size_type __cap_;
};
-#if _LIBCPP_BIG_ENDIAN
+#ifdef _LIBCPP_BIG_ENDIAN
static const size_type __short_mask = 0x01;
static const size_type __long_mask = 0x1ul;
#else // _LIBCPP_BIG_ENDIAN
@@ -700,7 +700,7 @@
pointer __data_;
};
-#if _LIBCPP_BIG_ENDIAN
+#ifdef _LIBCPP_BIG_ENDIAN
static const size_type __short_mask = 0x80;
static const size_type __long_mask = ~(size_type(~0) >> 1);
#else // _LIBCPP_BIG_ENDIAN
@@ -1241,7 +1241,7 @@
_LIBCPP_INLINE_VISIBILITY
void __set_short_size(size_type __s) _NOEXCEPT
-# if _LIBCPP_BIG_ENDIAN
+# ifdef _LIBCPP_BIG_ENDIAN
{__r_.first().__s.__size_ = (unsigned char)(__s << 1);}
# else
{__r_.first().__s.__size_ = (unsigned char)(__s);}
@@ -1249,7 +1249,7 @@
_LIBCPP_INLINE_VISIBILITY
size_type __get_short_size() const _NOEXCEPT
-# if _LIBCPP_BIG_ENDIAN
+# ifdef _LIBCPP_BIG_ENDIAN
{return __r_.first().__s.__size_ >> 1;}
# else
{return __r_.first().__s.__size_;}
@@ -1259,7 +1259,7 @@
_LIBCPP_INLINE_VISIBILITY
void __set_short_size(size_type __s) _NOEXCEPT
-# if _LIBCPP_BIG_ENDIAN
+# ifdef _LIBCPP_BIG_ENDIAN
{__r_.first().__s.__size_ = (unsigned char)(__s);}
# else
{__r_.first().__s.__size_ = (unsigned char)(__s << 1);}
@@ -1267,7 +1267,7 @@
_LIBCPP_INLINE_VISIBILITY
size_type __get_short_size() const _NOEXCEPT
-# if _LIBCPP_BIG_ENDIAN
+# ifdef _LIBCPP_BIG_ENDIAN
{return __r_.first().__s.__size_;}
# else
{return __r_.first().__s.__size_ >> 1;}
@@ -2870,7 +2870,7 @@
basic_string<_CharT, _Traits, _Allocator>::max_size() const _NOEXCEPT
{
size_type __m = __alloc_traits::max_size(__alloc());
-#if _LIBCPP_BIG_ENDIAN
+#ifdef _LIBCPP_BIG_ENDIAN
return (__m <= ~__long_mask ? __m : __m/2) - __alignment;
#else
return __m - __alignment;
