!745 提供接口检查hashmap是否为空

Merge pull request !745 from Mupceet/hashempty

services/include/init_hashmap.h

@@ -52,6 +52,7 @@ typedef struct {
 
 typedef void *HashMapHandle;
 
+int HashMapIsEmpty(HashMapHandle handle);
 int32_t HashMapCreate(HashMapHandle *handle, const HashInfo *info);
 void HashMapDestory(HashMapHandle handle);
 int32_t HashMapAdd(HashMapHandle handle, HashNode *hashNode);

services/utils/init_hashmap.c

@@ -181,3 +181,16 @@ void HashMapTraverse(HashMapHandle handle, void (*hashNodeTraverse)(const HashNo
         }
     }
 }
+
+int HashMapIsEmpty(HashMapHandle handle)
+{
+    INIT_ERROR_CHECK(handle != NULL, return 1, "Invalid param");
+    HashTab *tab = (HashTab *)handle;
+    for (int i = 0; i < tab->maxBucket; i++) {
+        HashNode *node = tab->buckets[i];
+        if (node != NULL) {
+            return 0;
+        }
+    }
+    return 1;
+}