1 files changed, 16 insertions, 1 deletions
diff --git a/src/aria2api.cc b/src/aria2api.cc
index f42ca5ed..3c2be5ac 100644
--- a/src/aria2api.cc
+++ b/src/aria2api.cc
@@ -109,11 +109,26 @@ int run(Session* session, RUN_MODE mode)
   return e->run(mode == RUN_ONCE);
 }
 
-std::string gidToString(const A2Gid& gid)
+std::string gidToHex(const A2Gid& gid)
 {
   return GroupId::toHex(gid);
 }
 
+A2Gid hexToGid(const std::string& hex)
+{
+  A2Gid gid;
+  if(GroupId::toNumericId(gid, hex.c_str()) == 0) {
+    return gid;
+  } else {
+    return 0;
+  }
+}
+
+bool isNull(const A2Gid& gid)
+{
+  return gid == 0;
+}
+
 namespace {
 template<typename InputIterator, typename Pred>
 void apiGatherOption