1 files changed, 14 insertions, 0 deletions
diff --git a/regcomp.c b/regcomp.c
index f24c0c46e3..b8a0723d01 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -5202,6 +5202,20 @@ onig_free(regex_t* reg)
   }
 }
 
+size_t
+onig_memsize(regex_t *reg)
+{
+    size_t size = sizeof(regex_t);
+    if (IS_NOT_NULL(reg->p))                size += reg->alloc;
+    if (IS_NOT_NULL(reg->exact))            size += reg->exact_end - reg->exact;
+    if (IS_NOT_NULL(reg->int_map))          size += sizeof(int) * ONIG_CHAR_TABLE_SIZE;
+    if (IS_NOT_NULL(reg->int_map_backward)) size += sizeof(int) * ONIG_CHAR_TABLE_SIZE;
+    if (IS_NOT_NULL(reg->repeat_range))     size += reg->repeat_range_alloc * sizeof(OnigRepeatRange);
+    if (IS_NOT_NULL(reg->chain))            size += onig_memsize(reg->chain);
+
+    return size;
+}
+
 #define REGEX_TRANSFER(to,from) do {\
   (to)->state = ONIG_STATE_MODIFY;\
   onig_free_body(to);\