fix bug in stringInsertBytesAtMaybeAlloc()

2026-07-29 07:25:56 -05:00
parent 1c8a0c27b2
commit 2662516d94
2 changed files with 12 additions and 1 deletions
@@ -494,7 +494,11 @@ fn bool stringInsertBytesAtMaybeAlloc(Arena* a, String* s, str bytes, u32 at) {
  bool is_already_enough_space = stringInsertBytesAt(s, bytes, at);
  if (!is_already_enough_space) {
    ptr old_bytes = s->bytes;
-    s->bytes = arenaAllocZero(a, s->capacity + 64);
+    u32 len = strlen(bytes);
+    u32 available_cap = s->capacity - s->length;
+    assert(len > available_cap);
+    s->capacity += (len - available_cap);
+    s->bytes = arenaAllocZero(a, s->capacity);
    MemoryCopy(s->bytes, old_bytes, s->length);
    return stringInsertBytesAt(s, bytes, at);
  }