---
lib.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/lib.c b/lib.c
index e1454661b..c107505a7 100644
--- a/lib.c
+++ b/lib.c
@@ -476,6 +476,41 @@ static void handle_arch_finalize(void)
}
+struct mask_map {
+ const char *name;
+ unsigned long mask;
+};
+
+static unsigned long lookup_mask(const char *name, const struct mask_map *map)
+{
+ for (; map->name; map++) {
+ if (strcmp(name, map->name) == 0)
+ return map->mask;
+ }
+ return 0;
+}
+
+inline
+static unsigned long handle_suboption_mask(char *arg, const struct mask_map *map)
+{
+ const char *token;
+ unsigned long mask = 0;
+
+ if (*arg == '\0')
+ return lookup_mask("$default", map);
+ if (*arg != '=')
+ return ~0UL;
+ arg++;
+ while ((token = strsep(&arg, ",+"))) {
+ unsigned long opt = lookup_mask(token, map);
+ if (!opt)
+ return ~0UL;
+ mask |= opt;
+ }
+ return mask;
+}
+
+
struct flag {
const char *name;
int *flag;
--
2.14.0
--
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