+int mdoc_valid_pre(struct mdoc *, struct mdoc_node *);
+int mdoc_valid_post(struct mdoc *);
+int mdoc_action_pre(struct mdoc *, struct mdoc_node *);
+int mdoc_action_post(struct mdoc *);
+
+int mdoc_argv(struct mdoc *, int, int,
+ struct mdoc_arg *, int *, char *);
+#define ARGV_ERROR (-1)
+#define ARGV_EOLN (0)
+#define ARGV_ARG (1)
+#define ARGV_WORD (2)
+void mdoc_argv_free(int, struct mdoc_arg *);
+int mdoc_args(struct mdoc *, int,
+ int *, char *, int, char **);
+#define ARGS_ERROR (-1)
+#define ARGS_EOLN (0)
+#define ARGS_WORD (1)
+#define ARGS_PUNCT (2)
+
+#define ARGS_QUOTED (1 << 0)
+#define ARGS_DELIM (1 << 1)
+#define ARGS_TABSEP (1 << 2)
+
+int xstrlcat(char *, const char *, size_t);
+int xstrlcpy(char *, const char *, size_t);
+int xstrcmp(const char *, const char *);
+void *xcalloc(size_t, size_t);
+char *xstrdup(const char *);
+
+int macro_obsolete(MACRO_PROT_ARGS);
+int macro_constant(MACRO_PROT_ARGS);
+int macro_constant_scoped(MACRO_PROT_ARGS);
+int macro_constant_delimited(MACRO_PROT_ARGS);