Re-implemented Object#to_eet in C.

[ruby-eet.git] / ext / ext.c

diff --git a/ext/ext.c b/ext/ext.c
index 938720af2a68d56e97f6cab75f0d206f74a437e9..a734dfad6da6370ae878b0b82b3903dca2f6356a 100644 (file)
--- a/ext/ext.c
+++ b/ext/ext.c
@@ -1,5 +1,5 @@
 /*
- * $Id: ext.c 48 2005-05-30 19:20:42Z tilman $
+ * $Id: ext.c 49 2005-05-30 19:52:36Z tilman $
  *
  * Copyright (c) 2005 Tilman Sauerbeck (tilman at code-monkey de)
  *
@@ -25,6 +25,7 @@
 
 #include <Eet.h>
 #include <ruby.h>
+#include <st.h>
 
 #define CHECK_KEY(key) \
        if (rb_funcall (key, id_include, 1, INT2FIX (0)) == Qtrue) \
@@ -44,7 +45,11 @@
 
 static VALUE c_close (VALUE self);
 
-static ID id_include, id_tag, id_data;
+static VALUE cStream, cChunk,
+             eEetError, eNameError, ePropError;
+static ID id_include, id_serialize, id_push, id_empty,
+          id_to_eet_chunks, id_to_eet_name, id_to_eet_properties,
+          id_tag, id_data;
 
 static void
 c_free (Eet_File **ef)
@@ -433,7 +438,6 @@ stream_serialize (VALUE self)
 {
        VALUE ret;
        struct RArray *stream;
-       static ID id_serialize;
        long i;
 
        ret = rb_str_new2 ("");
@@ -442,9 +446,6 @@ stream_serialize (VALUE 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);
 
@@ -518,10 +519,71 @@ chunk_serialize (VALUE self)
        return ret;
 }
 
+static int
+for_each_prop (VALUE tag, VALUE arg, VALUE stream)
+{
+       VALUE value, type, chunks;
+       long len, i;
+
+       if (rb_obj_is_kind_of (arg, rb_cArray) == Qfalse)
+               rb_raise (ePropError, "hash value is not an array");
+
+       value = rb_ary_entry (arg, 0);
+       if (NIL_P (value))
+               return ST_CONTINUE;
+
+       type = rb_ary_entry (arg, 1);
+       chunks = rb_funcall (value, id_to_eet_chunks, 2, tag, type);
+
+       len = RARRAY (chunks)->len;
+
+       for (i = 0; i < len; i++)
+               rb_funcall (stream, id_push, 1, rb_ary_entry (chunks, i));
+
+       return ST_CONTINUE;
+}
+
+/*
+ * :call-seq:
+ *  object.to_eet -> string
+ *
+ * Serializes the receiver to EET format.
+ */
+static VALUE
+c_to_eet (VALUE self)
+{
+       VALUE props, name, stream, chunk, args[2];
+
+       props = rb_funcall (self, id_to_eet_properties, 0);
+
+       if (rb_obj_is_kind_of (props, rb_cHash) == Qfalse ||
+           rb_funcall (props, id_empty, 0) == Qtrue)
+               rb_raise (ePropError, "invalid EET properties");
+
+       name = rb_funcall (self, id_to_eet_name, 0);
+       StringValue (name);
+
+       if (rb_funcall (name, id_include, 1, INT2FIX (0)) == Qtrue ||
+           rb_funcall (name, id_empty, 0) == Qtrue)
+               rb_raise (eNameError, "invalid EET name");
+
+       stream = rb_class_new_instance (0, NULL, cStream);
+
+       rb_hash_foreach (props, for_each_prop, stream);
+
+       args[0] = name;
+       args[1] = rb_funcall (stream, id_serialize, 0);
+       chunk = rb_class_new_instance (2, args, cChunk);
+
+       stream = rb_class_new_instance (1, &chunk, cStream);
+
+       return rb_funcall (stream, id_serialize, 0);
+}
+
 void
 Init_eet_ext ()
 {
-       VALUE m, c, cs, cc;
+       VALUE m, c;
 
        m = rb_define_module ("Eet");
 
@@ -537,17 +599,29 @@ Init_eet_ext ()
        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);
+       cStream = rb_define_class_under (m, "Stream", rb_cArray);
+       rb_define_method (cStream, "serialize", stream_serialize, 0);
+
+       cChunk = rb_define_class_under (m, "Chunk", rb_cObject);
+       rb_define_method (cChunk, "initialize", chunk_init, 2);
+       rb_define_method (cChunk, "serialize", chunk_serialize, 0);
+
+       rb_define_attr (cChunk, "tag", 1, 0);
+       rb_define_attr (cChunk, "data", 1, 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_method (rb_cObject, "to_eet", c_to_eet, 0);
 
-       rb_define_attr (cc, "tag", 1, 0);
-       rb_define_attr (cc, "data", 1, 0);
+       eEetError = rb_define_class_under (m, "EetError", rb_eStandardError);
+       eNameError = rb_define_class_under (m, "NameError", eEetError);
+       ePropError = rb_define_class_under (m, "PropertyError", eEetError);
 
        id_include = rb_intern ("include?");
+       id_serialize = rb_intern ("serialize");
+       id_push = rb_intern ("push");
+       id_empty = rb_intern ("empty?");
+       id_to_eet_chunks = rb_intern ("to_eet_chunks");
+       id_to_eet_name = rb_intern ("to_eet_name");
+       id_to_eet_properties = rb_intern ("to_eet_properties");
        id_tag = rb_intern ("@tag");
        id_data = rb_intern ("@data");
 }