Move some macros from include/openssl/opensslconf.h.in, add OPENSSL_FUNC

New header file, include/openssl/macros.h, which contains diverse
useful macros that we use elsewhere.

We also add the new macro OPENSSL_FUNC, which is an alias for
__FUNC__, __FUNCTION__, __FUNCSIG or __func__, depending on what the
compiler supports.  In the worst case, it's an alias for the string
"(unknown function)".

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9452)

2 files changed, 144 insertions, 115 deletions

diff --git a/include/openssl/macros.h b/include/openssl/macros.h
new file mode 100644
index 0000000000..6b735b6b0b
--- /dev/null
+++ b/include/openssl/macros.h
@@ -0,0 +1,142 @@
+/*
+ * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#ifndef OPENSSL_MACROS_H
+# define OPENSSL_MACROS_H
+
+/*
+ * Sometimes OPENSSSL_NO_xxx ends up with an empty file and some compilers
+ * don't like that.  This will hopefully silence them.
+ */
+# define NON_EMPTY_TRANSLATION_UNIT static void *dummy = &dummy;
+
+/*
+ * Applications should use -DOPENSSL_API_COMPAT=<version> to suppress the
+ * declarations of functions deprecated in or before <version>.  If this is
+ * undefined, the value of the macro OPENSSL_API_MIN above is the default.
+ *
+ * For any version number up until version 1.1.x, <version> is expected to be
+ * the calculated version number 0xMNNFFPPSL.  For version numbers 3.0.0 and
+ * on, <version> is expected to be only the major version number (i.e. 3 for
+ * version 3.0.0).
+ */
+# ifndef DECLARE_DEPRECATED
+#  define DECLARE_DEPRECATED(f)   f;
+#  ifdef __GNUC__
+#   if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 0)
+#    undef DECLARE_DEPRECATED
+#    define DECLARE_DEPRECATED(f)    f __attribute__ ((deprecated));
+#   endif
+#  endif
+# endif
+
+/*
+ * We convert the OPENSSL_API_COMPAT value to an API level.  The API level
+ * is the major version number for 3.0.0 and on.  For earlier versions, it
+ * uses this scheme, which is close enough for our purposes:
+ *
+ *      0.x.y   0       (0.9.8 was the last release in this series)
+ *      1.0.x   1       (1.0.2 was the last release in this series)
+ *      1.1.x   2       (1.1.1 was the last release in this series)
+ */
+
+/* In case someone defined both */
+# if defined(OPENSSL_API_COMPAT) && defined(OPENSSL_API_LEVEL)
+#  error "Disallowed to define both OPENSSL_API_COMPAT and OPENSSL_API_LEVEL"
+# endif
+
+# ifndef OPENSSL_API_COMPAT
+#  define OPENSSL_API_LEVEL OPENSSL_MIN_API
+# else
+#  if (OPENSSL_API_COMPAT < 0x1000L) /* Major version numbers up to 16777215 */
+#   define OPENSSL_API_LEVEL OPENSSL_API_COMPAT
+#  elif (OPENSSL_API_COMPAT & 0xF0000000L) == 0x00000000L
+#   define OPENSSL_API_LEVEL 0
+#  elif (OPENSSL_API_COMPAT & 0xFFF00000L) == 0x10000000L
+#   define OPENSSL_API_LEVEL 1
+#  elif (OPENSSL_API_COMPAT & 0xFFF00000L) == 0x10100000L
+#   define OPENSSL_API_LEVEL 2
+#  else
+    /* Major number 3 to 15 */
+#   define OPENSSL_API_LEVEL ((OPENSSL_API_COMPAT >> 28) & 0xF)
+#  endif
+# endif
+
+/*
+ * Do not deprecate things to be deprecated in version 4.0 before the
+ * OpenSSL version number matches.
+ */
+# if OPENSSL_VERSION_MAJOR < 4
+#  define DEPRECATEDIN_4(f)       f;
+#  define OPENSSL_API_4 0
+# elif OPENSSL_API_LEVEL < 4
+#  define DEPRECATEDIN_4(f)       DECLARE_DEPRECATED(f)
+#  define OPENSSL_API_4 0
+# else
+#  define DEPRECATEDIN_4(f)
+#  define OPENSSL_API_4 1
+# endif
+
+# if OPENSSL_API_LEVEL < 3
+#  define DEPRECATEDIN_3(f)       DECLARE_DEPRECATED(f)
+#  define OPENSSL_API_3 0
+# else
+#  define DEPRECATEDIN_3(f)
+#  define OPENSSL_API_3 1
+# endif
+
+# if OPENSSL_API_LEVEL < 2
+#  define DEPRECATEDIN_1_1_0(f)   DECLARE_DEPRECATED(f)
+#  define OPENSSL_API_1_1_0 0
+# else
+#  define DEPRECATEDIN_1_1_0(f)
+#  define OPENSSL_API_1_1_0 1
+# endif
+
+# if OPENSSL_API_LEVEL < 1
+#  define DEPRECATEDIN_1_0_0(f)   DECLARE_DEPRECATED(f)
+#  define OPENSSL_API_1_0_0 0
+# else
+#  define DEPRECATEDIN_1_0_0(f)
+#  define OPENSSL_API_1_0_0 1
+# endif
+
+# if OPENSSL_API_LEVEL < 0
+#  define DEPRECATEDIN_0_9_8(f)   DECLARE_DEPRECATED(f)
+#  define OPENSSL_API_0_9_8 0
+# else
+#  define DEPRECATEDIN_0_9_8(f)
+#  define OPENSSL_API_0_9_8 1
+# endif
+
+# ifndef OPENSSL_FILE
+#  ifdef OPENSSL_NO_FILENAMES
+#   define OPENSSL_FILE ""
+#   define OPENSSL_LINE 0
+#  else
+#   define OPENSSL_FILE __FILE__
+#   define OPENSSL_LINE __LINE__
+#  endif
+# endif
+
+# ifndef OPENSSL_FUNC
+#  if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
+#   define OPENSSL_FUNC __func__
+#  elif defined(__STDC__) && defined(PEDANTIC)
+#   define OPENSSL_FUNC "(PEDANTIC disallows function name)"
+#  elif defined(_MSC_VER) || (defined(__GNUC__) && __GNUC__ >= 2)
+#   define OPENSSL_FUNC __FUNCTION__
+#  elif defined(__FUNCSIG__)
+#   define OPENSSL_FUNC __FUNCSIG__
+#  else
+#   define OPENSSL_FUNC "(unknown function)"
+#  endif
+# endif
+
+#endif  /* OPENSSL_MACROS_H */
diff --git a/include/openssl/opensslconf.h.in b/include/openssl/opensslconf.h.in
index b0d339ac9a..5673b5b963 100644
--- a/include/openssl/opensslconf.h.in
+++ b/include/openssl/opensslconf.h.in
@@ -47,121 +47,6 @@ extern "C" {
     "";
 -}
 
-/*
- * Sometimes OPENSSSL_NO_xxx ends up with an empty file and some compilers
- * don't like that.  This will hopefully silence them.
- */
-# define NON_EMPTY_TRANSLATION_UNIT static void *dummy = &dummy;
-
-/*
- * Applications should use -DOPENSSL_API_COMPAT=<version> to suppress the
- * declarations of functions deprecated in or before <version>.  If this is
- * undefined, the value of the macro OPENSSL_API_MIN above is the default.
- *
- * For any version number up until version 1.1.x, <version> is expected to be
- * the calculated version number 0xMNNFFPPSL.  For version numbers 3.0.0 and
- * on, <version> is expected to be only the major version number (i.e. 3 for
- * version 3.0.0).
- */
-# ifndef DECLARE_DEPRECATED
-#  define DECLARE_DEPRECATED(f)   f;
-#  ifdef __GNUC__
-#   if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 0)
-#    undef DECLARE_DEPRECATED
-#    define DECLARE_DEPRECATED(f)    f __attribute__ ((deprecated));
-#   endif
-#  endif
-# endif
-
-/*
- * We convert the OPENSSL_API_COMPAT value to an API level.  The API level
- * is the major version number for 3.0.0 and on.  For earlier versions, it
- * uses this scheme, which is close enough for our purposes:
- *
- *      0.x.y   0       (0.9.8 was the last release in this series)
- *      1.0.x   1       (1.0.2 was the last release in this series)
- *      1.1.x   2       (1.1.1 was the last release in this series)
- */
-
-/* In case someone defined both */
-# if defined(OPENSSL_API_COMPAT) && defined(OPENSSL_API_LEVEL)
-#  error "Disallowed to define both OPENSSL_API_COMPAT and OPENSSL_API_LEVEL"
-# endif
-
-# ifndef OPENSSL_API_COMPAT
-#  define OPENSSL_API_LEVEL OPENSSL_MIN_API
-# else
-#  if (OPENSSL_API_COMPAT < 0x1000L) /* Major version numbers up to 16777215 */
-#   define OPENSSL_API_LEVEL OPENSSL_API_COMPAT
-#  elif (OPENSSL_API_COMPAT & 0xF0000000L) == 0x00000000L
-#   define OPENSSL_API_LEVEL 0
-#  elif (OPENSSL_API_COMPAT & 0xFFF00000L) == 0x10000000L
-#   define OPENSSL_API_LEVEL 1
-#  elif (OPENSSL_API_COMPAT & 0xFFF00000L) == 0x10100000L
-#   define OPENSSL_API_LEVEL 2
-#  else
-    /* Major number 3 to 15 */
-#   define OPENSSL_API_LEVEL ((OPENSSL_API_COMPAT >> 28) & 0xF)
-#  endif
-# endif
-
-/*
- * Do not deprecate things to be deprecated in version 4.0 before the
- * OpenSSL version number matches.
- */
-# if OPENSSL_VERSION_MAJOR < 4
-#  define DEPRECATEDIN_4(f)       f;
-#  define OPENSSL_API_4 0
-# elif OPENSSL_API_LEVEL < 4
-#  define DEPRECATEDIN_4(f)       DECLARE_DEPRECATED(f)
-#  define OPENSSL_API_4 0
-# else
-#  define DEPRECATEDIN_4(f)
-#  define OPENSSL_API_4 1
-# endif
-
-# if OPENSSL_API_LEVEL < 3
-#  define DEPRECATEDIN_3(f)       DECLARE_DEPRECATED(f)
-#  define OPENSSL_API_3 0
-# else
-#  define DEPRECATEDIN_3(f)
-#  define OPENSSL_API_3 1
-# endif
-
-# if OPENSSL_API_LEVEL < 2
-#  define DEPRECATEDIN_1_1_0(f)   DECLARE_DEPRECATED(f)
-#  define OPENSSL_API_1_1_0 0
-# else
-#  define DEPRECATEDIN_1_1_0(f)
-#  define OPENSSL_API_1_1_0 1
-# endif
-
-# if OPENSSL_API_LEVEL < 1
-#  define DEPRECATEDIN_1_0_0(f)   DECLARE_DEPRECATED(f)
-#  define OPENSSL_API_1_0_0 0
-# else
-#  define DEPRECATEDIN_1_0_0(f)
-#  define OPENSSL_API_1_0_0 1
-# endif
-
-# if OPENSSL_API_LEVEL < 0
-#  define DEPRECATEDIN_0_9_8(f)   DECLARE_DEPRECATED(f)
-#  define OPENSSL_API_0_9_8 0
-# else
-#  define DEPRECATEDIN_0_9_8(f)
-#  define OPENSSL_API_0_9_8 1
-# endif
-
-# ifndef OPENSSL_FILE
-#  ifdef OPENSSL_NO_FILENAMES
-#   define OPENSSL_FILE ""
-#   define OPENSSL_LINE 0
-#  else
-#   define OPENSSL_FILE __FILE__
-#   define OPENSSL_LINE __LINE__
-#  endif
-# endif
-
 /* Generate 80386 code? */
 {- $config{processor} eq "386" ? "# define" : "# undef" -} I386_ONLY
 
@@ -178,6 +63,8 @@ extern "C" {
 
 # define RC4_INT {- $config{rc4_int} -}
 
+#include <openssl/macros.h>
+
 # ifdef  __cplusplus
 }
 # endif