More preparation for 7.0 in versioning

This modifies the macros introduced in
9b6e951 that allow one to determine how
the version of the perl currently being compiled compares to an
arbitrary one.  The modification is based on changes in the plan,
including renaming of variables.

This also introduces the use of '*' for the subversion (or micro as it
is now called) to make conversion from the soon-to-be deprecated
PERL_VERSION macro more rote, with less thinking involved.

Author: khwilliamson

handy.h

@@ -430,14 +430,34 @@ Perl_xxx(aTHX_ ...) form for any API calls where it's used.
 	Perl_get_cvn_flags(aTHX_ STR_WITH_LEN(str), (flags))
 
 /* internal helpers */
-#define PERL_RVS_TO_DECIMAL_(r,v,s) (((r)*1000000)+((v)*1000)+(s))
+/* Transitional */
+#ifndef PERL_MAJOR_VERSION
+#  define PERL_MAJOR_VERSION  PERL_REVISION
+#else
+#  undef  PERL_REVISION     /* We don't want code to be using these */
+#endif
+#ifndef PERL_MINOR_VERSION
+#  define PERL_MINOR_VERSION  PERL_VERSION
+#else
+#  undef  PERL_VERSION
+#endif
+#ifndef PERL_MICRO_VERSION
+#  define PERL_MICRO_VERSION  PERL_SUBVERSION
+#else
+#  undef  PERL_SUBVERSION
+#endif
+
+#define PERL_JNP_TO_DECIMAL_(maJor,miNor,Patch)                             \
+            /* '10*' leaves room for things like alpha, beta, releases */   \
+                    (10 * ((maJor) * 1000000) + ((miNor) * 1000) + (Patch))
 #define PERL_DECIMAL_VERSION_                                               \
-        PERL_RVS_TO_DECIMAL_(PERL_REVISION, PERL_VERSION, PERL_SUBVERSION)
+        PERL_JNP_TO_DECIMAL_(PERL_MAJOR_VERSION, PERL_MINOR_VERSION,        \
+                                                        PERL_MICRO_VERSION)
 
 /*
-=for apidoc AmR|bool|PERL_VERSION_EQ|const int r|const int v|const int s
+=for apidoc AmR|bool|PERL_VERSION_EQ|const U8 major|const U8 minor|const U8 patch
 
-Returns whether or not the perl currently executing has the specified
+Returns whether or not the perl currently being compiled has the specified
 relationship to the perl given by the parameters.  For example,
 
  #if PERL_VERSION_GT(5,24,2)
@@ -452,21 +472,61 @@ The possible comparisons are C<PERL_VERSION_EQ>, C<PERL_VERSION_NE>,
 C<PERL_VERSION_GE>, C<PERL_VERSION_GT>, C<PERL_VERSION_LE>, and
 C<PERL_VERSION_LT>.
 
-=for apidoc AmRh|bool|PERL_VERSION_NE|const int r|const int v|const int s
-=for apidoc AmRh|bool|PERL_VERSION_GE|const int r|const int v|const int s
-=for apidoc AmRh|bool|PERL_VERSION_GT|const int r|const int v|const int s
-=for apidoc AmRh|bool|PERL_VERSION_LE|const int r|const int v|const int s
-=for apidoc AmRh|bool|PERL_VERSION_LT|const int r|const int v|const int s
+You may use the special value '*' for the final number to mean ALL possible
+values for it.  Thus,
+
+ #if PERL_VERSION_EQ(5,31,'*')
+
+means all perls in the 5.31 series.  And
+
+ #if PERL_VERSION_NE(5,24,'*')
+
+means all perls EXCEPT 5.24 ones.  And
+
+ #if PERL_VERSION_LE(5,9,'*')
+
+is effectively
+
+ #if PERL_VERSION_LT(5,10,0)
+
+This means you don't have to think so much when converting from the existing
+deprecated C<PERL_VERSION> to using this macro:
+
+ #if PERL_VERSION <= 9
+
+becomes
+
+ #if PERL_VERSION_LE(5,9,'*')
+
+=for apidoc AmRh|bool|PERL_VERSION_NE|const U8 major|const U8 minor|const U8 patch
+=for apidoc AmRh|bool|PERL_VERSION_GE|const U8 major|const U8 minor|const U8 patch
+=for apidoc AmRh|bool|PERL_VERSION_GT|const U8 major|const U8 minor|const U8 patch
+=for apidoc AmRh|bool|PERL_VERSION_LE|const U8 major|const U8 minor|const U8 patch
+=for apidoc AmRh|bool|PERL_VERSION_LT|const U8 major|const U8 minor|const U8 patch
 
 =cut
 */
 
-# define PERL_VERSION_EQ(r,v,s) (PERL_DECIMAL_VERSION_ == PERL_RVS_TO_DECIMAL_(r,v,s))
-# define PERL_VERSION_NE(r,v,s) (! PERL_VERSION_EQ(r,v,s))
-# define PERL_VERSION_LT(r,v,s) (PERL_DECIMAL_VERSION_ < PERL_RVS_TO_DECIMAL_(r,v,s))
-# define PERL_VERSION_LE(r,v,s) (PERL_DECIMAL_VERSION_ <= PERL_RVS_TO_DECIMAL_(r,v,s))
-# define PERL_VERSION_GT(r,v,s) (! PERL_VERSION_LE(r,v,s))
-# define PERL_VERSION_GE(r,v,s) (! PERL_VERSION_LT(r,v,s))
+/* N.B. These don't work if the patch version is 42 or 92, as those are what
+ * '*' is in ASCII and EBCDIC respectively */
+# define PERL_VERSION_EQ(j,n,p)                                             \
+              (((p) == '*')                                                 \
+               ? (   (j) == PERL_MAJOR_VERSION                              \
+                  && (n) == PERL_MINOR_VERSION)                             \
+               : (PERL_DECIMAL_VERSION_ == PERL_JNP_TO_DECIMAL_(j,n,p)))
+# define PERL_VERSION_NE(j,n,p) (! PERL_VERSION_EQ(j,n,p))
+
+# define PERL_VERSION_LT(j,n,p) /* < '*' effectively means < 0 */           \
+    (PERL_DECIMAL_VERSION_ < PERL_JNP_TO_DECIMAL_( (j),                     \
+                                                   (n),                     \
+                                                 (((p) == '*') ? 0 : p)))
+# define PERL_VERSION_GE(j,n,p)  (! PERL_VERSION_LT(j,n,p))
+
+# define PERL_VERSION_LE(j,n,p)  /* <= '*' effectively means < n+1 */       \
+    (PERL_DECIMAL_VERSION_ < PERL_JNP_TO_DECIMAL_(                  (j),    \
+                                          (((p) == '*') ? ((n)+1) : (n)),   \
+                                          (((p) == '*') ? 0 : p)))
+# define PERL_VERSION_GT(j,n,p) (! PERL_VERSION_LE(j,n,p))
 
 /*
 =head1 Miscellaneous Functions