* error.c (rb_check_typed_struct): new function to check typed

  struct.

* include/ruby/ruby.h (Check_TypedStruct, Data_Get_TypedStruct):
  new macro to check typed struct.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@23981 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 20 insertions, 0 deletions

diff --git a/error.c b/error.c
index bfa3a950d..04ea58de1 100644
--- a/error.c
+++ b/error.c
@@ -316,6 +316,26 @@ rb_check_type(VALUE x, int t)
     }
 }
 
+void *
+rb_check_typed_struct(VALUE obj, const rb_data_type_t *data_type)
+{
+    const char *etype;
+    static const char mesg[] = "wrong argument type %s (expected %s)";
+
+    if (SPECIAL_CONST_P(obj) || BUILTIN_TYPE(obj) != T_DATA) {
+	Check_Type(obj, T_DATA);
+    }
+    if (!RTYPEDDATA_P(obj)) {
+	etype = rb_obj_classname(obj);
+	rb_raise(rb_eTypeError, mesg, etype, data_type->name);
+    }
+    else if (RTYPEDDATA_TYPE(obj) != data_type) {
+	etype = RTYPEDDATA_TYPE(obj)->name;
+	rb_raise(rb_eTypeError, mesg, etype, data_type->name);
+    }
+    return DATA_PTR(obj);
+}
+
 /* exception classes */
 #include <errno.h>