From 3dbf227ed0423c71e5a3f9b2952dcd8a1b3ccc58 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 13 Jun 2013 05:51:14 +0000
Subject: ruby.h: safe_level check

* include/ruby/ruby.h (RUBY_SAFE_LEVEL_CHECK): check constant safe
  level at compile time.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41273 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 include/ruby/ruby.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'include/ruby/ruby.h')

diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 18539e8548..4ec4e7f192 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -556,9 +556,20 @@ VALUE rb_get_path(VALUE);
 VALUE rb_get_path_no_checksafe(VALUE);
 #define FilePathStringValue(v) ((v) = rb_get_path_no_checksafe(v))
 
+#define RUBY_SAFE_LEVEL_MAX 3
 void rb_secure(int);
 int rb_safe_level(void);
 void rb_set_safe_level(int);
+#if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+int ruby$safe_level$4(void) __attribute__((error("$SAFE=4 is obsolete")));
+#define RUBY_SAFE_LEVEL_INVALID_P(level) \
+    __extension__(__builtin_constant_p(level) && \
+		  ((level) < 0 || RUBY_SAFE_LEVEL_MAX < (level)))
+#define RUBY_SAFE_LEVEL_CHECK(level) \
+    (RUBY_SAFE_LEVEL_INVALID_P(level) ? ruby$safe_level$4() : 0)
+#define rb_secure(level) (RUBY_SAFE_LEVEL_CHECK(level), rb_secure(level))
+#define rb_set_safe_level(level) (RUBY_SAFE_LEVEL_CHECK(level), rb_set_safe_level(level))
+#endif
 void rb_set_safe_level_force(int);
 void rb_secure_update(VALUE);
 NORETURN(void rb_insecure_operation(void));
-- 
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