perf tools: Add PARSE_OPT_DISABLED flag

In some cases, we need to reuse exising options with some of them
disabled.  To do that, add PARSE_OPT_DISABLED flag and
set_option_flag() function.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Alexander Yarygin <yarygin@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1413990949-13953-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 19 insertions, 0 deletions

diff --git a/tools/perf/util/parse-options.c b/tools/perf/util/parse-options.c
index bf48092983c6..b6016101b40b 100644
--- a/tools/perf/util/parse-options.c
+++ b/tools/perf/util/parse-options.c
@@ -42,6 +42,8 @@ static int get_value(struct parse_opt_ctx_t *p,
                 return opterror(opt, "takes no value", flags);
         if (unset && (opt->flags & PARSE_OPT_NONEG))
                 return opterror(opt, "isn't available", flags);
+        if (opt->flags & PARSE_OPT_DISABLED)
+                return opterror(opt, "is not usable", flags);
 
         if (!(flags & OPT_SHORT) && p->opt) {
                 switch (opt->type) {
@@ -509,6 +511,8 @@ static void print_option_help(const struct option *opts, int full)
         }
         if (!full && (opts->flags & PARSE_OPT_HIDDEN))
                 return;
+        if (opts->flags & PARSE_OPT_DISABLED)
+                return;
 
         pos = fprintf(stderr, "    ");
         if (opts->short_name)
@@ -679,3 +683,16 @@ int parse_opt_verbosity_cb(const struct option *opt,
         }
         return 0;
 }
+
+void set_option_flag(struct option *opts, int shortopt, const char *longopt,
+                     int flag)
+{
+        for (; opts->type != OPTION_END; opts++) {
+                if ((shortopt && opts->short_name == shortopt) ||
+                    (opts->long_name && longopt &&
+                     !strcmp(opts->long_name, longopt))) {
+                        opts->flags |= flag;
+                        break;
+                }
+        }
+}
diff --git a/tools/perf/util/parse-options.h b/tools/perf/util/parse-options.h
index b59ba858e73d..b7c80dbc7627 100644
--- a/tools/perf/util/parse-options.h
+++ b/tools/perf/util/parse-options.h
@@ -38,6 +38,7 @@ enum parse_opt_option_flags {
         PARSE_OPT_NONEG   = 4,
         PARSE_OPT_HIDDEN  = 8,
         PARSE_OPT_LASTARG_DEFAULT = 16,
+        PARSE_OPT_DISABLED = 32,
 };
 
 struct option;
@@ -211,4 +212,5 @@ extern int parse_opt_verbosity_cb(const struct option *, const char *, int);
 
 extern const char *parse_options_fix_filename(const char *prefix, const char *file);
 
+void set_option_flag(struct option *opts, int sopt, const char *lopt, int flag);
 #endif /* __PERF_PARSE_OPTIONS_H */