/*
- * $Id: ext.c 31 2005-04-12 19:03:50Z tilman $
+ * $Id: ext.c 38 2005-05-13 18:30:15Z tilman $
*
* Copyright (c) 2005 Tilman Sauerbeck (tilman at code-monkey de)
*
#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) \
if (!*(ef)) \
rb_raise (rb_eIOError, "closed stream");
+#ifdef WORDS_BIGENDIAN
+# define BSWAP32(x) \
+ ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
+ (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
+#else /* !WORDS_BIGENDIAN */
+# define BSWAP32(x) (x)
+#endif /* WORDS_BIGENDIAN */
+
static VALUE c_close (VALUE self);
+static VALUE id_include;
+
static void
c_free (Eet_File **ef)
{
return INT2FIX (n);
}
+static VALUE
+stream_serialize (VALUE self)
+{
+ VALUE ret;
+ struct RArray *stream;
+ static ID id_serialize;
+ long i;
+
+ ret = rb_str_new2 ("");
+
+ stream = RARRAY (self);
+ if (!stream->len)
+ return ret;
+
+ if (!id_serialize)
+ id_serialize = rb_intern ("serialize");
+
+ for (i = 0; i < stream->len; i++) {
+ VALUE str = rb_funcall (stream->ptr[i], id_serialize, 0, NULL);
+
+ rb_str_append (ret, str);
+ }
+
+ return ret;
+}
+
+static VALUE
+chunk_serialize (VALUE self)
+{
+ VALUE tmp, ret;
+ 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);
+ tag = RSTRING (tmp);
+
+ tmp = rb_ivar_get (self, id_data);
+ StringValue (tmp);
+ data = RSTRING (tmp);
+
+ buf_len = 9 + tag->len + data->len;
+ ret = rb_str_buf_new (buf_len);
+
+ buf = RSTRING (ret)->ptr;
+ RSTRING (ret)->len = buf_len;
+
+ memcpy (buf, "CHnK", 4);
+ buf += 4;
+
+ size = tag->len + data->len + 1;
+ size = BSWAP32 (size);
+ memcpy (buf, &size, 4);
+ buf += 4;
+
+ memcpy (buf, tag->ptr, tag->len);
+ buf += tag->len;
+
+ *buf++ = 0;
+
+ memcpy (buf, data->ptr, data->len);
+
+ return ret;
+}
+
void
Init_eet_ext ()
{
- VALUE m, c;
+ VALUE m, c, cs, cc;
m = rb_define_module ("Eet");
rb_define_method (c, "write", c_write, -1);
rb_define_method (c, "read_image", c_read_image, 1);
rb_define_method (c, "write_image", c_write_image, -1);
+
+ 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, "serialize", chunk_serialize, 0);
+
+ id_include = rb_intern ("include?");
}