1 files changed, 88 insertions, 0 deletions
diff --git a/fallback/const-xs.inc b/fallback/const-xs.inc
new file mode 100644
index 0000000..b19d898
--- /dev/null
+++ b/fallback/const-xs.inc
@@ -0,0 +1,88 @@
+void
+constant(sv)
+    PREINIT:
+#ifdef dXSTARG
+	dXSTARG; /* Faster if we have it.  */
+#else
+	dTARGET;
+#endif
+	STRLEN		len;
+        int		type;
+	IV		iv;
+	/* NV		nv;	Uncomment this if you need to return NVs */
+	/* const char	*pv;	Uncomment this if you need to return PVs */
+    INPUT:
+	SV *		sv;
+        const char *	s = SvPV(sv, len);
+    PPCODE:
+        /* Change this to constant(aTHX_ s, len, &iv, &nv);
+           if you need to return both NVs and IVs */
+	type = constant(aTHX_ s, len, &iv);
+      /* Return 1 or 2 items. First is error message, or undef if no error.
+           Second, if present, is found value */
+        switch (type) {
+        case PERL_constant_NOTFOUND:
+          sv = sv_2mortal(newSVpvf("%s is not a valid Compress::Bzip2 macro", s));
+          PUSHs(sv);
+          break;
+        case PERL_constant_NOTDEF:
+          sv = sv_2mortal(newSVpvf(
+	    "Your vendor has not defined Compress::Bzip2 macro %s, used", s));
+          PUSHs(sv);
+          break;
+        case PERL_constant_ISIV:
+          EXTEND(SP, 1);
+          PUSHs(&PL_sv_undef);
+          PUSHi(iv);
+          break;
+	/* Uncomment this if you need to return NOs
+        case PERL_constant_ISNO:
+          EXTEND(SP, 1);
+          PUSHs(&PL_sv_undef);
+          PUSHs(&PL_sv_no);
+          break; */
+	/* Uncomment this if you need to return NVs
+        case PERL_constant_ISNV:
+          EXTEND(SP, 1);
+          PUSHs(&PL_sv_undef);
+          PUSHn(nv);
+          break; */
+	/* Uncomment this if you need to return PVs
+        case PERL_constant_ISPV:
+          EXTEND(SP, 1);
+          PUSHs(&PL_sv_undef);
+          PUSHp(pv, strlen(pv));
+          break; */
+	/* Uncomment this if you need to return PVNs
+        case PERL_constant_ISPVN:
+          EXTEND(SP, 1);
+          PUSHs(&PL_sv_undef);
+          PUSHp(pv, iv);
+          break; */
+	/* Uncomment this if you need to return SVs
+        case PERL_constant_ISSV:
+          EXTEND(SP, 1);
+          PUSHs(&PL_sv_undef);
+          PUSHs(sv);
+          break; */
+	/* Uncomment this if you need to return UNDEFs
+        case PERL_constant_ISUNDEF:
+          break; */
+	/* Uncomment this if you need to return UVs
+        case PERL_constant_ISUV:
+          EXTEND(SP, 1);
+          PUSHs(&PL_sv_undef);
+          PUSHu((UV)iv);
+          break; */
+	/* Uncomment this if you need to return YESs
+        case PERL_constant_ISYES:
+          EXTEND(SP, 1);
+          PUSHs(&PL_sv_undef);
+          PUSHs(&PL_sv_yes);
+          break; */
+        default:
+          sv = sv_2mortal(newSVpvf(
+	    "Unexpected return type %d while processing Compress::Bzip2 macro %s, used",
+               type, s));
+          PUSHs(sv);
+        }