parse-opt: create parse_options_step.

diff --git a/parse-options.h b/parse-options.h
index 4ee443dafe146f05d1fe2a46e7e39ca6fdd608f9..33c683cb5459f8da0e165e3d270a53a985227071 100644 (file)
--- a/parse-options.h
+++ b/parse-options.h
@@ -111,6 +111,35 @@ extern int parse_options(int argc, const char **argv,
 extern NORETURN void usage_with_options(const char * const *usagestr,
                                         const struct option *options);
 
+/*----- incremantal advanced APIs -----*/
+
+enum {
+       PARSE_OPT_HELP = -1,
+       PARSE_OPT_DONE,
+       PARSE_OPT_UNKNOWN,
+};
+
+struct parse_opt_ctx_t {
+       const char **argv;
+       const char **out;
+       int argc, cpidx;
+       const char *opt;
+       int flags;
+};
+
+extern int parse_options_usage(const char * const *usagestr,
+                              const struct option *opts);
+
+extern void parse_options_start(struct parse_opt_ctx_t *ctx,
+                               int argc, const char **argv, int flags);
+
+extern int parse_options_step(struct parse_opt_ctx_t *ctx,
+                             const struct option *options,
+                             const char * const usagestr[]);
+
+extern int parse_options_end(struct parse_opt_ctx_t *ctx);
+
+
 /*----- some often used options -----*/
 extern int parse_opt_abbrev_cb(const struct option *, const char *, int);
 extern int parse_opt_approxidate_cb(const struct option *, const char *, int);