libc: <stdint.h>: Proper C++
This patch prevents the definition of various macros when <stdint.h> is
included from C++. The ISO C99 standard mentions that when this header
is included from a C++ source file, limit and constant related macros
should only be defined when asked explicitely by defining
__STDC_LIMIT_MACROS and __STD_CONSTANT_MACROS, respectively.
The <stdint.h> lacked the proper #ifdef .. #endif blocks for the
following macros:
INTPTR_MIN, INTPTR_MAX, UINTPTR_MAX, PTRDIFF_MIN, PTRDIFF_MAX
INTMAX_MIN, INTMAX_MAX, UINTMAX_MAX,
INPTR_C, UINTPR_C, PTRDIFF_C, INTMAX_C, UINTMAX_C
This is intended to fix http://code.google.com/p/android/issues/detail?id=14380
after we copy this file to development/ndk/platforms/android-3/include/
Change-Id: Ia77e0822edfaaf568ea599d7de673b310eeeaa4a
diff --git a/libc/include/stdint.h b/libc/include/stdint.h
index 237baa2..a889f15 100644
--- a/libc/include/stdint.h
+++ b/libc/include/stdint.h
@@ -211,14 +211,20 @@
typedef int intptr_t;
typedef unsigned int uintptr_t;
+#ifdef __STDINT_LIMITS
# define INTPTR_MIN INT32_MIN
# define INTPTR_MAX INT32_MAX
# define UINTPTR_MAX UINT32_MAX
+# define PTRDIFF_MIN INT32_MIN
+# define PTRDIFF_MAX INT32_MAX
+#endif
+
+#ifdef __STDINT_MACROS
# define INTPTR_C(c) INT32_C(c)
# define UINTPTR_C(c) UINT32_C(c)
# define PTRDIFF_C(c) INT32_C(c)
-# define PTRDIFF_MIN INT32_MIN
-# define PTRDIFF_MAX INT32_MAX
+#endif
+
/*
@@ -230,24 +236,32 @@
typedef uint64_t uintmax_t;
typedef int64_t intmax_t;
-#define INTMAX_MIN INT64_MIN
-#define INTMAX_MAX INT64_MAX
-#define UINTMAX_MAX UINT64_MAX
+#ifdef __STDINT_LIMITS
+# define INTMAX_MIN INT64_MIN
+# define INTMAX_MAX INT64_MAX
+# define UINTMAX_MAX UINT64_MAX
+#endif
-#define INTMAX_C(c) INT64_C(c)
-#define UINTMAX_C(c) UINT64_C(c)
+#ifndef __STDINT_MACROS
+# define INTMAX_C(c) INT64_C(c)
+# define UINTMAX_C(c) UINT64_C(c)
+#endif
#else /* !__STDC_INT64__ */
typedef uint32_t uintmax_t;
typedef int32_t intmax_t;
-#define INTMAX_MIN INT32_MIN
-#define INTMAX_MAX INT32_MAX
-#define UINTMAX_MAX UINT32_MAX
+#ifdef __STDINT_LIMITS
+# define INTMAX_MIN INT32_MIN
+# define INTMAX_MAX INT32_MAX
+# define UINTMAX_MAX UINT32_MAX
+#endif
-#define INTMAX_C(c) INT32_C(c)
-#define UINTMAX_C(c) UINT32_C(c)
+#ifdef __STDINT_MACROS
+# define INTMAX_C(c) INT32_C(c)
+# define UINTMAX_C(c) UINT32_C(c)
+#endif
#endif /* !__STDC_INT64__ */