From 270d25bf2db157c9d1cdcc57bccefabbb1341524 Mon Sep 17 00:00:00 2001
From: Masaki Muranaka <monaka@monami-ya.jp>
Date: Sat, 8 Mar 2014 13:54:02 +0900
Subject: Make type casts safer.

---
 src/class.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src/class.c')

diff --git a/src/class.c b/src/class.c
index 9880a82fa..6f5a8ed19 100644
--- a/src/class.c
+++ b/src/class.c
@@ -533,9 +533,12 @@ mrb_get_args(mrb_state *mrb, const char *format, ...)
 
         ps = va_arg(ap, char**);
         if (i < argc) {
+          size_t size_t_len;
           ss = to_str(mrb, *sp++);
           s = mrb_str_ptr(ss);
-          len = (mrb_int)strlen(RSTRING_PTR(ss));
+          size_t_len = strlen(RSTRING_PTR(ss));
+          mrb_assert(size_t_len <= MRB_INT_MAX);
+          len = (mrb_int)size_t_len;
           if (len < RSTRING_LEN(ss)) {
             mrb_raise(mrb, E_ARGUMENT_ERROR, "string contains null byte");
           }
-- 
cgit v1.2.3