X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=ext%2Fext.c;h=938720af2a68d56e97f6cab75f0d206f74a437e9;hb=b6055f83ebf477b190ce22ca0da6c4c4023aca4a;hp=02ddba9454dd2789c3e08b86cb7bd9f5747a492a;hpb=2c5f0577496dbb429a327fc85e72e7f4dcf4250c;p=ruby-eet.git

diff --git a/ext/ext.c b/ext/ext.c
index 02ddba9..938720a 100644
--- a/ext/ext.c
+++ b/ext/ext.c
@@ -1,5 +1,5 @@
 /*
- * $Id: ext.c 35 2005-05-10 18:58:49Z tilman $
+ * $Id: ext.c 48 2005-05-30 19:20:42Z tilman $
  *
  * Copyright (c) 2005 Tilman Sauerbeck (tilman at code-monkey de)
  *
@@ -39,13 +39,12 @@
 	((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
 	(((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
 #else /* !WORDS_BIGENDIAN */
-# define BSWAP16(x) (x)
 # define BSWAP32(x) (x)
 #endif /* WORDS_BIGENDIAN */
 
 static VALUE c_close (VALUE self);
 
-static VALUE id_include;
+static ID id_include, id_tag, id_data;
 
 static void
 c_free (Eet_File **ef)
@@ -455,6 +454,30 @@ stream_serialize (VALUE self)
 	return ret;
 }
 
+static VALUE
+chunk_init (VALUE self, VALUE tag, VALUE data)
+{
+	unsigned long len;
+
+	StringValue (tag);
+	StringValue (data);
+
+	if (rb_funcall (tag, id_include, 1, INT2FIX (0)) == Qtrue) \
+		rb_raise (rb_eArgError, "tag must not contain binary zeroes");
+
+	/* libeet uses a signed 32bit integer to store the
+	 * chunk size, so make sure we don't overflow it
+	 */
+	len = RSTRING (tag)->len + 1 + RSTRING (data)->len;
+	if (len < 0 || len >= 2147483647L)
+		rb_raise (rb_eArgError, "tag or data too long");
+
+	rb_ivar_set (self, id_tag, rb_str_dup_frozen (tag));
+	rb_ivar_set (self, id_data, rb_str_dup_frozen (data));
+
+	return self;
+}
+
 static VALUE
 chunk_serialize (VALUE self)
 {
@@ -462,13 +485,6 @@ chunk_serialize (VALUE self)
 	unsigned int size, buf_len;
 	unsigned char *buf;
 	struct RString *tag, *data;
-	static ID id_tag, id_data;
-
-	if (!id_tag)
-		id_tag = rb_intern ("@tag");
-
-	if (!id_data)
-		id_data = rb_intern ("@data");
 
 	tmp = rb_ivar_get (self, id_tag);
 	StringValue (tmp);
@@ -505,7 +521,7 @@ chunk_serialize (VALUE self)
 void
 Init_eet_ext ()
 {
-	VALUE m, c;
+	VALUE m, c, cs, cc;
 
 	m = rb_define_module ("Eet");
 
@@ -521,11 +537,17 @@ Init_eet_ext ()
 	rb_define_method (c, "read_image", c_read_image, 1);
 	rb_define_method (c, "write_image", c_write_image, -1);
 
-	c = rb_define_class_under (m, "Stream", rb_cArray);
-	rb_define_method (c, "serialize", stream_serialize, 0);
+	cs = rb_define_class_under (m, "Stream", rb_cArray);
+	rb_define_method (cs, "serialize", stream_serialize, 0);
+
+	cc = rb_define_class_under (m, "Chunk", rb_cObject);
+	rb_define_method (cc, "initialize", chunk_init, 2);
+	rb_define_method (cc, "serialize", chunk_serialize, 0);
 
-	c = rb_define_class_under (m, "Chunk", rb_cObject);
-	rb_define_method (c, "serialize", chunk_serialize, 0);
+	rb_define_attr (cc, "tag", 1, 0);
+	rb_define_attr (cc, "data", 1, 0);
 
 	id_include = rb_intern ("include?");
+	id_tag = rb_intern ("@tag");
+	id_data = rb_intern ("@data");
 }