From b8a1c347098ba746c5b2ba6201790f6cfc7eba44 Mon Sep 17 00:00:00 2001
From: "Arnold D. Robbins" <arnold@skeeve.com>
Date: Fri, 21 Oct 2011 15:13:28 +0200
Subject: More faking of MBS support, mainly for VMS.

---
 ChangeLog |  2 ++
 dfa.c     | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 66 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 887ac716..2393ac3e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,8 @@
 
 	* Makefile.am (distcleancheck_listfiles): Added, per advice from
 	Stefano Lattarini <stefano.lattarini@gmail.com>.
+	* dfa.c: Additional faking of mbsupport for systems without it;
+	mainly VMS.
 
 2011-10-21  Stefano Lattarini  <stefano.lattarini@gmail.com>
 
diff --git a/dfa.c b/dfa.c
index a909f68f..96bba214 100644
--- a/dfa.c
+++ b/dfa.c
@@ -73,8 +73,13 @@
 #define wint_t	int
 #define mbstate_t	int
 #define WEOF	EOF
-#define towupper toupper
-#define towlower tolower
+#define towupper	toupper
+#define towlower	tolower
+#define btowc(x)	(x)
+#define iswalnum	isalnum
+#define iswalpha	isalpha
+#define iswupper	isupper
+#define wcscoll		strcmp
 #endif /* ! MBS_SUPPORT */
 #endif /* GAWK */
 
@@ -88,7 +93,63 @@ is_blank (int c)
 {
    return (c == ' ' || c == '\t');
 }
-#endif
+
+#if ! MBS_SUPPORT
+static const char *classes[] = {
+  	"<dummy>",
+	"alnum",
+	"alpha",
+	"blank",
+	"cntrl",
+	"digit",
+	"graph",
+	"lower",
+	"print",
+	"punct",
+	"space",
+	"upper",
+	"xdigit",
+	NULL
+};
+
+static wctype_t wctype(const char *name)
+{
+	int i;
+
+	for (i = 1; classes[i] != NULL; i++)
+		if (strcmp(name, classes[i]) == 0)
+			return i;
+
+	return 0;
+}
+
+static int iswctype(wint_t wc, wctype_t desc)
+{
+	int j = sizeof(classes) / sizeof(classes[0]);
+
+	if (desc >= j || desc == 0)
+		return 0;
+
+	switch (desc) {
+	case 1:		return isalnum(wc);
+	case 2:		return isalpha(wc);
+	case 3:		return is_blank(wc);
+	case 4:		return iscntrl(wc);
+	case 5:		return isdigit(wc);
+	case 6:		return isgraph(wc);
+	case 7:		return islower(wc);
+	case 8:		return isprint(wc);
+	case 9:		return ispunct(wc);
+	case 10:	return isspace(wc);
+	case 11:	return isupper(wc);
+	case 12:	return isxdigit(wc);
+	default:	return 0;
+	}
+}
+
+static 
+#endif /* ! MBS_SUPPORT */
+#endif /* GAWK */
 
 /* HPUX, define those as macros in sys/param.h */
 #ifdef setbit
-- 
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