--- /dev/null	Mon Jan 20 00:15:16 2020
+++ mandoc-1.14.5/charclass.h	Mon Jan 20 00:15:04 2020
@@ -0,0 +1,29 @@
+/*
+ * Public domain, 2008, Todd C. Miller <millert@openbsd.org>
+ *
+ * $OpenBSD: charclass.h,v 1.2 2019/01/25 00:19:25 millert Exp $
+ */
+
+/*
+ * POSIX character class support for fnmatch() and glob().
+ */
+static struct cclass {
+	const char *name;
+	int (*isctype)(int);
+} cclasses[] = {
+	{ "alnum",	isalnum },
+	{ "alpha",	isalpha },
+	{ "blank",	isblank },
+	{ "cntrl",	iscntrl },
+	{ "digit",	isdigit },
+	{ "graph",	isgraph },
+	{ "lower",	islower },
+	{ "print",	isprint },
+	{ "punct",	ispunct },
+	{ "space",	isspace },
+	{ "upper",	isupper },
+	{ "xdigit",	isxdigit },
+	{ NULL,		NULL }
+};
+
+#define NCCLASSES	(sizeof(cclasses) / sizeof(cclasses[0]) - 1)