X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=ext%2Fext.c;h=2c99b02b0890853179194349c6249b77b4ced03f;hb=9bc23cbc321e908fd0761c40b3953574317f1131;hp=31beceada0ffa392d0459e47069873000b2ebf0a;hpb=49e6c8f56d89681f20836a14480959fa89d24e26;p=ruby-eet.git

diff --git a/ext/ext.c b/ext/ext.c
index 31becea..2c99b02 100644
--- a/ext/ext.c
+++ b/ext/ext.c
@@ -1,5 +1,5 @@
 /*
- * $Id: ext.c 34 2005-04-30 13:15:19Z tilman $
+ * $Id: ext.c 47 2005-05-30 19:19:07Z tilman $
  *
  * Copyright (c) 2005 Tilman Sauerbeck (tilman at code-monkey de)
  *
@@ -27,8 +27,7 @@
 #include <ruby.h>
 
 #define CHECK_KEY(key) \
-	if (rb_funcall (key, rb_intern ("include?"), \
-	                1, INT2FIX (0)) == Qtrue) \
+	if (rb_funcall (key, id_include, 1, INT2FIX (0)) == Qtrue) \
 		rb_raise (rb_eArgError, "key must not contain binary zeroes");
 
 #define CHECK_CLOSED(ef) \
@@ -40,12 +39,13 @@
 	((((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, id_tag, id_data;
+
 static void
 c_free (Eet_File **ef)
 {
@@ -454,6 +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)
 {
@@ -461,13 +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);
@@ -504,7 +521,7 @@ chunk_serialize (VALUE self)
 void
 Init_eet_ext ()
 {
-	VALUE m, c;
+	VALUE m, c, cs, cc;
 
 	m = rb_define_module ("Eet");
 
@@ -520,9 +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);
+
+	rb_define_attr (cc, "tag", 1, 0);
+	rb_define_attr (cc, "data", 1, 0);
 
-	c = rb_define_class_under (m, "Chunk", rb_cObject);
-	rb_define_method (c, "serialize", chunk_serialize, 0);
+	id_include = rb_intern ("include?");
+	id_tag = rb_intern ("@tag");
+	id_data = rb_intern ("@data");
 }