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variable.c (iv_rehash): just memcpy sorted array; no need to call iv_put

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Yukihiro "Matz" Matsumoto
2025-05-27 10:53:58 +09:00
parent 9cee6ead4c
commit 63a09ee336
1 changed files with 14 additions and 10 deletions
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src/variable.c
+14 -10
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@@ -48,20 +48,24 @@ iv_rehash(mrb_state *mrb, iv_tbl *t)
int new_alloc = old_alloc > 0 ? old_alloc << 1 : IV_INITIAL_SIZE;
mrb_value *old_ptr = t->ptr;
/* allocate the same total size as before */
/* allocate exactly the same total shape as before */
t->ptr = (mrb_value*)mrb_calloc(mrb, sizeof(mrb_value)+sizeof(mrb_sym), new_alloc);
t->size = 0;
/* size remains unchanged, alloc grows */
t->alloc = new_alloc;
if (old_alloc == 0) return;
/* collect old entries */
mrb_sym *old_keys = (mrb_sym*)&old_ptr[old_alloc];
mrb_value *old_vals = old_ptr;
for (int i = 0; i < old_alloc; i++) {
if (IV_KEY_P(old_keys[i])) {
iv_put(mrb, t, old_keys[i], old_vals[i]);
}
if (old_alloc == 0) {
/* first‐time init: nothing to copy */
return;
}
/* pointers into the old block */
mrb_value *old_vals = old_ptr;
mrb_sym *old_keys = (mrb_sym*)&old_ptr[old_alloc];
/* copy just the live range [0..size-1] */
memcpy(t->ptr, old_vals, sizeof(mrb_value)*t->size);
memcpy((mrb_sym*)&t->ptr[new_alloc], old_keys, sizeof(mrb_sym)*t->size);
mrb_free(mrb, old_ptr);
}