add some comments; fix some bugs in advance

1 files changed, 4 insertions, 0 deletions

diff --git a/src/include/hash_table.h b/src/include/hash_table.h
index df2d368..833daee 100644
--- a/src/include/hash_table.h
+++ b/src/include/hash_table.h
@@ -32,6 +32,8 @@ void sl_list_add(sl_list_t *l, char *key, ast_t *value);
 
 ast_t *sl_list_get(sl_list_t *l, char *key);
 
+bool sl_list_exists(sl_list_t *l, char *key);
+
 void sl_list_free(sl_list_t *l);
 
 hash_table_t *init_hash_table(int size);
@@ -40,6 +42,8 @@ void hash_table_add(hash_table_t *h, char *key, ast_t *value);
 
 ast_t *hash_table_get(hash_table_t *h, char *key);
 
+bool hash_table_exists(hash_table_t *h, char *key);
+
 unsigned long hash(char *key, int size);
 
 void hash_table_free(hash_table_t *h);