Improve utf8len() performance with UTF-8

2026-06-08 16:11:16 +00:00 · 2019-07-14 18:55:38 +09:00
parent a7be9f1cab
commit 7b260d9c2d
1 changed files with 2 additions and 0 deletions
@@ -233,7 +233,9 @@ utf8len(const char* p, const char* e)
  mrb_int len;
  mrb_int i;

+  if ((unsigned char)*p < 0x80) return 1;
  len = utf8len_codepage[(unsigned char)*p];
+  if (len == 1) return 1;
  if (len > e - p) return 1;
  for (i = 1; i < len; ++i)
    if ((p[i] & 0xc0) != 0x80)