X-Git-Url: http://git.code-monkey.de/?p=ruby-vorbistagger.git;a=blobdiff_plain;f=ext%2Fext.c;h=6a45359772e325ff0ca6c75f8a265917cb77df76;hp=67fa6b14b24811514db40966ca373d1050c9bbf8;hb=2f95f6bbefc52f171610f8a4c49157907ced3e14;hpb=2a86264bbe06e4e24e86170ece78e0ed8bf24e32

diff --git a/ext/ext.c b/ext/ext.c
index 67fa6b1..6a45359 100644
--- a/ext/ext.c
+++ b/ext/ext.c
@@ -25,6 +25,10 @@
 #include "vcedit.h"
 #include "comments.h"
 
+#define CHECK_CLOSED(o) \
+	if (!o->state) \
+		rb_raise (eClosed, "closed stream");
+
 typedef struct {
 	vcedit_state *state;
 	VALUE comments;
@@ -32,8 +36,8 @@ typedef struct {
 
 static VALUE c_close (VALUE self);
 
-static VALUE cComments, eVT, eOpen, eInvalidData, eInvalidComment,
-             eTempFile, eReopen;
+static VALUE cComments, eVT, eClosed, eOpen, eInvalidData,
+             eInvalidComment, eTempFile, eReopen;
 static ID id_length;
 
 static void
@@ -149,6 +153,8 @@ c_close (VALUE self)
 
 	Data_Get_Struct (self, RbVorbisTagger, o);
 
+	CHECK_CLOSED (o);
+
 	vcedit_state_unref (o->state);
 	o->state = NULL;
 
@@ -169,6 +175,8 @@ c_write (VALUE self)
 
 	Data_Get_Struct (self, RbVorbisTagger, o);
 
+	CHECK_CLOSED (o);
+
 	comments_sync (o->comments, o->state);
 
 	switch (vcedit_write (o->state)) {
@@ -199,6 +207,8 @@ c_comments (VALUE self)
 
 	Data_Get_Struct (self, RbVorbisTagger, o);
 
+	CHECK_CLOSED (o);
+
 	return o->comments;
 }
 
@@ -225,6 +235,7 @@ Init_vorbistagger_ext (void)
 	rb_define_method (cVT, "comments", c_comments, 0);
 
 	eVT = rb_define_class_under (cVT, "TaggerError", eVorbis);
+	eClosed = rb_define_class_under (cVT, "ClosedStreamError", eVT);
 	eOpen = rb_define_class_under (cVT, "OpenError", eVT);
 	eInvalidData = rb_define_class_under (cVT, "InvalidDataError", eVT);
 	eInvalidComment = rb_define_class_under (cVT, "InvalidCommentError",