Import vutil.h from the CPAN version dist

This will be needed when we switch vutil.c over to using macros for
version functions, the way the CPAN dist does it.

1 files changed, 170 insertions, 0 deletions

diff --git a/vutil.h b/vutil.h
new file mode 100644
index 0000000000..d307843a4d
--- /dev/null
+++ b/vutil.h
@@ -0,0 +1,170 @@
+#include "ppport.h"
+
+/* The MUTABLE_*() macros cast pointers to the types shown, in such a way
+ * (compiler permitting) that casting away const-ness will give a warning;
+ * e.g.:
+ *
+ * const SV *sv = ...;
+ * AV *av1 = (AV*)sv;        <== BAD:  the const has been silently cast away
+ * AV *av2 = MUTABLE_AV(sv); <== GOOD: it may warn
+ */
+
+#ifndef MUTABLE_PTR
+#  if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
+#    define MUTABLE_PTR(p) ({ void *_p = (p); _p; })
+#  else
+#    define MUTABLE_PTR(p) ((void *) (p))
+#  endif
+
+#  define MUTABLE_AV(p)	((AV *)MUTABLE_PTR(p))
+#  define MUTABLE_CV(p)	((CV *)MUTABLE_PTR(p))
+#  define MUTABLE_GV(p)	((GV *)MUTABLE_PTR(p))
+#  define MUTABLE_HV(p)	((HV *)MUTABLE_PTR(p))
+#  define MUTABLE_IO(p)	((IO *)MUTABLE_PTR(p))
+#  define MUTABLE_SV(p)	((SV *)MUTABLE_PTR(p))
+#endif
+
+#ifndef SvPVx_nolen_const
+#  if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
+#    define SvPVx_nolen_const(sv) ({SV *_sv = (sv); SvPV_nolen_const(_sv); })
+#  else
+#    define SvPVx_nolen_const(sv) (SvPV_nolen_const(sv))
+#  endif
+#endif
+
+#ifndef PERL_ARGS_ASSERT_CK_WARNER
+static void Perl_ck_warner(pTHX_ U32 err, const char* pat, ...);
+
+#  ifdef vwarner
+static
+void
+Perl_ck_warner(pTHX_ U32 err, const char* pat, ...)
+{
+  va_list args;
+
+  PERL_UNUSED_ARG(err);
+  if (ckWARN(err)) {
+    va_list args;
+    va_start(args, pat);
+    vwarner(err, pat, &args);
+    va_end(args);
+  }
+}
+#  else
+/* yes this replicates my_warner */
+static
+void
+Perl_ck_warner(pTHX_ U32 err, const char* pat, ...)
+{
+  SV *sv;
+  va_list args;
+
+  PERL_UNUSED_ARG(err);
+
+  va_start(args, pat);
+  sv = vnewSVpvf(pat, &args);
+  va_end(args);
+  sv_2mortal(sv);
+  warn("%s", SvPV_nolen(sv));
+}
+#  endif
+#endif
+
+#define PERL_VERSION_DECIMAL(r,v,s) (r*1000000 + v*1000 + s)
+#define PERL_DECIMAL_VERSION \
+	PERL_VERSION_DECIMAL(PERL_REVISION,PERL_VERSION,PERL_SUBVERSION)
+#define PERL_VERSION_LT(r,v,s) \
+	(PERL_DECIMAL_VERSION < PERL_VERSION_DECIMAL(r,v,s))
+#define PERL_VERSION_GE(r,v,s) \
+	(PERL_DECIMAL_VERSION >= PERL_VERSION_DECIMAL(r,v,s))
+
+#define ISA_CLASS_OBJ(v,c) (sv_isobject(v) && sv_derived_from(v,c))
+
+#if PERL_VERSION_GE(5,9,0)
+
+#  define VUTIL_REPLACE_CORE 1
+
+const char * Perl_scan_version2(pTHX_ const char *s, SV *rv, bool qv);
+SV * Perl_new_version2(pTHX_ SV *ver);
+SV * Perl_upg_version2(pTHX_ SV *sv, bool qv);
+SV * Perl_vstringify2(pTHX_ SV *vs);
+SV * Perl_vverify2(pTHX_ SV *vs);
+SV * Perl_vnumify2(pTHX_ SV *vs);
+SV * Perl_vnormal2(pTHX_ SV *vs);
+SV * Perl_vstringify2(pTHX_ SV *vs);
+int Perl_vcmp2(pTHX_ SV *lsv, SV *rsv);
+const char * Perl_prescan_version2(pTHX_ const char *s, bool strict, const char** errstr, bool *sqv, int *ssaw_decimal, int *swidth, bool *salpha);
+
+#  define SCAN_VERSION(a,b,c)	Perl_scan_version2(aTHX_ a,b,c)
+#  define NEW_VERSION(a)	Perl_new_version2(aTHX_ a)
+#  define UPG_VERSION(a,b)	Perl_upg_version2(aTHX_ a, b)
+#  define VSTRINGIFY(a)		Perl_vstringify2(aTHX_ a)
+#  define VVERIFY(a)		Perl_vverify2(aTHX_ a)
+#  define VNUMIFY(a)		Perl_vnumify2(aTHX_ a)
+#  define VNORMAL(a)		Perl_vnormal2(aTHX_ a)
+#  define VCMP(a,b)		Perl_vcmp2(aTHX_ a,b)
+#  define PRESCAN_VERSION(a,b,c,d,e,f,g)	Perl_prescan_version2(aTHX_ a,b,c,d,e,f,g)
+#  define is_LAX_VERSION(a,b) \
+	(a != Perl_prescan_version2(aTHX_ a, FALSE, b, NULL, NULL, NULL, NULL))
+#  define is_STRICT_VERSION(a,b) \
+	(a != Perl_prescan_version2(aTHX_ a, TRUE, b, NULL, NULL, NULL, NULL))
+
+#else
+
+const char * Perl_scan_version(pTHX_ const char *s, SV *rv, bool qv);
+SV * Perl_new_version(pTHX_ SV *ver);
+SV * Perl_upg_version(pTHX_ SV *sv, bool qv);
+SV * Perl_vverify(pTHX_ SV *vs);
+SV * Perl_vnumify(pTHX_ SV *vs);
+SV * Perl_vnormal(pTHX_ SV *vs);
+SV * Perl_vstringify(pTHX_ SV *vs);
+int Perl_vcmp(pTHX_ SV *lsv, SV *rsv);
+const char * Perl_prescan_version(pTHX_ const char *s, bool strict, const char** errstr, bool *sqv, int *ssaw_decimal, int *swidth, bool *salpha);
+
+#  define SCAN_VERSION(a,b,c)	Perl_scan_version(aTHX_ a,b,c)
+#  define NEW_VERSION(a)	Perl_new_version(aTHX_ a)
+#  define UPG_VERSION(a,b)	Perl_upg_version(aTHX_ a, b)
+#  define VSTRINGIFY(a)		Perl_vstringify(aTHX_ a)
+#  define VVERIFY(a)		Perl_vverify(aTHX_ a)
+#  define VNUMIFY(a)		Perl_vnumify(aTHX_ a)
+#  define VNORMAL(a)		Perl_vnormal(aTHX_ a)
+#  define VCMP(a,b)		Perl_vcmp(aTHX_ a,b)
+
+#  define PRESCAN_VERSION(a,b,c,d,e,f,g)	Perl_prescan_version(aTHX_ a,b,c,d,e,f,g)
+#  define is_LAX_VERSION(a,b) \
+	(a != Perl_prescan_version(aTHX_ a, FALSE, b, NULL, NULL, NULL, NULL))
+#  define is_STRICT_VERSION(a,b) \
+	(a != Perl_prescan_version(aTHX_ a, TRUE, b, NULL, NULL, NULL, NULL))
+
+#endif
+
+#if PERL_VERSION_LT(5,11,4)
+#  define BADVERSION(a,b,c) \
+	if (b) { \
+	    *b = c; \
+	} \
+	return a;
+
+#  define PERL_ARGS_ASSERT_PRESCAN_VERSION	\
+	assert(s); assert(sqv); assert(ssaw_decimal);\
+	assert(swidth); assert(salpha);
+
+#  define PERL_ARGS_ASSERT_SCAN_VERSION	\
+	assert(s); assert(rv)
+#  define PERL_ARGS_ASSERT_NEW_VERSION	\
+	assert(ver)
+#  define PERL_ARGS_ASSERT_UPG_VERSION	\
+	assert(ver)
+#  define PERL_ARGS_ASSERT_VVERIFY	\
+	assert(vs)
+#  define PERL_ARGS_ASSERT_VNUMIFY	\
+	assert(vs)
+#  define PERL_ARGS_ASSERT_VNORMAL	\
+	assert(vs)
+#  define PERL_ARGS_ASSERT_VSTRINGIFY	\
+	assert(vs)
+#  define PERL_ARGS_ASSERT_VCMP	\
+	assert(lhv); assert(rhv)
+#  define PERL_ARGS_ASSERT_CK_WARNER      \
+	assert(pat)
+#endif