Rewrite PSPP output engine.

[pspp-builds.git] / src / output / charts / scree.h

diff --git a/src/output/charts/scree.h b/src/output/charts/scree.h
index 9324499886e48e7db5175b0166998cf6e6e4b294..43f5b822482c066bbf7b7364ce301f4fdd3e02a2 100644 (file)
--- a/src/output/charts/scree.h
+++ b/src/output/charts/scree.h
@@ -18,14 +18,80 @@
 #define OUTPUT_CHARTS_SCREE_H 1
 
 #include <gsl/gsl_vector.h>
+#include <output/chart-item.h>
 
-struct scree;
-struct chart;
+/* A scree plot. */
+struct scree
+  {
+    struct chart_item chart_item;
+    gsl_vector *eval;
+    char *xlabel;
+  };
 
 /* Create a "Scree Plot" of EIGENVALUES with LABEL on the X Axis */
 struct scree *scree_create (const gsl_vector *eigenvalues, const char *label);
 
 /* Return the chart underlying SCREE */
 struct chart *scree_get_chart (struct scree *scree);
+\f
+/* This boilerplate for scree, a subclass of chart_item, was
+   autogenerated by mk-class-boilerplate. */
 
-#endif 
+#include <assert.h>
+#include <libpspp/cast.h>
+
+extern const struct chart_item_class scree_class;
+
+/* Returns true if SUPER is a scree, otherwise false. */
+static inline bool
+is_scree (const struct chart_item *super)
+{
+  return super->class == &scree_class;
+}
+
+/* Returns SUPER converted to scree.  SUPER must be a scree, as
+   reported by is_scree. */
+static inline struct scree *
+to_scree (const struct chart_item *super)
+{
+  assert (is_scree (super));
+  return UP_CAST (super, struct scree, chart_item);
+}
+
+/* Returns INSTANCE converted to chart_item. */
+static inline struct chart_item *
+scree_super (const struct scree *instance)
+{
+  return CONST_CAST (struct chart_item *, &instance->chart_item);
+}
+
+/* Increments INSTANCE's reference count and returns INSTANCE. */
+static inline struct scree *
+scree_ref (const struct scree *instance)
+{
+  return to_scree (chart_item_ref (&instance->chart_item));
+}
+
+/* Decrements INSTANCE's reference count, then destroys INSTANCE if
+   the reference count is now zero. */
+static inline void
+scree_unref (struct scree *instance)
+{
+  chart_item_unref (&instance->chart_item);
+}
+
+/* Returns true if INSTANCE's reference count is greater than 1,
+   false otherwise. */
+static inline bool
+scree_is_shared (const struct scree *instance)
+{
+  return chart_item_is_shared (&instance->chart_item);
+}
+
+static inline void
+scree_submit (struct scree *instance)
+{
+  chart_item_submit (&instance->chart_item);
+}
+\f
+#endif /* output/charts/scree.h */