1 files changed, 52 insertions, 13 deletions
diff --git a/ruby_assert.h b/ruby_assert.h
index ddd348c7d3..3383e4fc6c 100644
--- a/ruby_assert.h
+++ b/ruby_assert.h
@@ -1,15 +1,54 @@
-#ifndef RUBY_TOPLEVEL_ASSERT_H                           /*-*-C-*-vi:se ft=c:*/
-#define RUBY_TOPLEVEL_ASSERT_H
-/**
- * @file
- * @author     Ruby developers <ruby-core@ruby-lang.org>
- * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
- *             Permission  is hereby  granted,  to  either redistribute  and/or
- *             modify this file, provided that  the conditions mentioned in the
- *             file COPYING are met.  Consult the file for details.
- */
-#include "ruby/assert.h"
+#ifndef RUBY_ASSERT_H
+#define RUBY_ASSERT_H
+
+#include "ruby/ruby.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#if 0
+} /* satisfy cc-mode */
+#endif
+#endif
+
+NORETURN(void rb_assert_failure(const char *, int, const char *, const char *));
+#ifdef RUBY_FUNCTION_NAME_STRING
+# define RUBY_ASSERT_FAIL(expr) \
+    rb_assert_failure(__FILE__, __LINE__, RUBY_FUNCTION_NAME_STRING, expr)
+#else
+# define RUBY_ASSERT_FAIL(expr) \
+    rb_assert_failure(__FILE__, __LINE__, NULL, expr)
+#endif
+#define RUBY_ASSERT_MESG(expr, mesg) \
+    ((expr) ? (void)0 : RUBY_ASSERT_FAIL(mesg))
+#ifdef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
+# define RUBY_ASSERT_MESG_WHEN(cond, expr, mesg) \
+    __builtin_choose_expr( \
+	__builtin_constant_p(cond), \
+	__builtin_choose_expr(cond, RUBY_ASSERT_MESG(expr, mesg), (void)0), \
+	RUBY_ASSERT_MESG(!(cond) || (expr), mesg))
+#else
+# define RUBY_ASSERT_MESG_WHEN(cond, expr, mesg) \
+    RUBY_ASSERT_MESG(!(cond) || (expr), mesg)
+#endif
+#define RUBY_ASSERT(expr) RUBY_ASSERT_MESG_WHEN(!RUBY_NDEBUG+0, expr, #expr)
+#define RUBY_ASSERT_WHEN(cond, expr) RUBY_ASSERT_MESG_WHEN(cond, expr, #expr)
+
 #undef assert
-#define assert RUBY_ASSERT_NDEBUG
+#define assert RUBY_ASSERT
+
+#ifndef RUBY_NDEBUG
+# ifdef NDEBUG
+#   define RUBY_NDEBUG 1
+# else
+#   define RUBY_NDEBUG 0
+# endif
+#endif
+
+#if defined(__cplusplus)
+#if 0
+{ /* satisfy cc-mode */
+#endif
+}  /* extern "C" { */
+#endif
 
-#endif /* RUBY_TOPLEVEL_ASSERT_H */
+#endif