ccan: allow user to set some bits in opt_table.type.

[ccan] / ccan / opt / opt.h

diff --git a/ccan/opt/opt.h b/ccan/opt/opt.h
index 6f4b9dda8c85a4f33389863963b57f1a87214ea4..9eec73854bb144f9051484578ff67f1af94ac386 100644 (file)
--- a/ccan/opt/opt.h
+++ b/ccan/opt/opt.h
@@ -509,6 +509,30 @@ char *opt_version_and_exit(const char *version);
 /* Display usage string to stdout, exit(0). */
 char *opt_usage_and_exit(const char *extra);
 
+/**
+ * opt_find_long: low-level access to the parser
+ * @arg: string of form 'arg' or 'arg=val'.
+ * @optarg: set to `val` of present in arg, otherwise NULL.  Can be NULL.
+ *
+ * Returns NULL if option is unknown.  Sets *@optarg to NULL if
+ * there's no '='.
+ */
+struct opt_table *opt_find_long(const char *arg, const char **optarg);
+
+/**
+ * opt_find_short: low-level access to the parser
+ * @arg: character representing short option
+ *
+ * Returns NULL if option is unknown.
+ */
+struct opt_table *opt_find_short(char arg);
+
+/* opt_type bits reserved for users to play with (ignored!).
+ * You can set bits in type e.g. (1<<OPT_USER_START) to (1<<OPT_USER_END)
+ * when calling _opt_register. */
+#define OPT_USER_START 8
+#define OPT_USER_END 15
+
 /* Below here are private declarations. */
 /* You can use this directly to build tables, but the macros will ensure
  * consistency and type safety. */
@@ -518,6 +542,11 @@ enum opt_type {
        OPT_SUBTABLE = 4,       /* Actually, longopt points to a subtable... */
        OPT_EARLY = 8,          /* Parse this from opt_early_parse() only. */
        OPT_END = 16,           /* End of the table. */
+
+       /* Make sure no compiler will assume we never have large
+        * values in the enum! */
+       OPT_USER_MIN = (1 << OPT_USER_START),
+       OPT_USER_MAX = (1 << OPT_USER_END),
 };
 
 struct opt_table {