add some comments; fix some bugs in advance

1 files changed, 11 insertions, 0 deletions

diff --git a/src/hash_table.c b/src/hash_table.c
index 9384945..3ca6dd0 100644
--- a/src/hash_table.c
+++ b/src/hash_table.c
@@ -70,6 +70,12 @@ ast_t *sl_list_get(sl_list_t *l, char *key) {
   return NULL;
 }
 
+bool sl_list_exists(sl_list_l, char *key) {
+  if (sl_list_get(l, key) != NULL)
+    return true;
+  return false;
+}
+
 void sl_list_free(sl_list_t *l) {
   sl_node_t *cur = l->head;
   sl_node_t *tmp;
@@ -111,6 +117,11 @@ void hash_table_free(hash_table_t *h) {
   free(h);
 }
 
+bool hash_table_exists(hash_table_t *h, char *key) {
+  sl_list_t *l = h->buckets[hash(key, h->size)];
+  return sl_list_exists(l, key);
+}
+
 /* DJB2 HASH FUNCTION */
 unsigned long hash(char *key, int size) {
   unsigned long hash = 5381;