1 files changed, 39 insertions, 2 deletions
diff --git a/vowpalwabbit/example.h b/vowpalwabbit/example.h
index 1602da26..3d572214 100644
--- a/vowpalwabbit/example.h
+++ b/vowpalwabbit/example.h
@@ -9,6 +9,15 @@ license as described in the file LICENSE.
 #include <stdint.h>
 #include "v_array.h"
 
+const size_t wap_ldf_namespace  = 126;
+const size_t history_namespace  = 127;
+const size_t constant_namespace = 128;
+const size_t nn_output_namespace  = 129;
+const size_t autolink_namespace  = 130;
+const size_t neighbor_namespace  = 131;
+const size_t affix_namespace     = 132;
+const size_t spelling_namespace  = 133;
+
 struct feature {
   float x;
   uint32_t weight_index;
@@ -59,10 +68,38 @@ struct example // core example datatype.
   bool done; //set to false by setup_example()
 };
 
+ struct vw;  
+ 
+namespace VW {
+struct flat_example 
+{
+	void* ld;  
+	simple_prediction final_prediction;  
+
+	size_t tag_len;
+	char* tag;//An identifier for the example.  
+
+	size_t example_counter;  
+	uint32_t ft_offset;  
+	float global_weight;
+
+	size_t num_features;//precomputed, cause it's fast&easy.  
+	size_t feature_map_len;
+	feature* feature_map; //map to store sparse feature vectors  
+};
+flat_example* flatten_example(vw& all, example *ec);
+void free_flatten_example(flat_example* fec);
+}
+
 example *alloc_example(size_t);
 void dealloc_example(void(*delete_label)(void*), example&);
 
-void update_example_indicies(bool audit, example* ec, uint32_t amount);
-bool command_example(void*a, example* ec); 
+inline int example_is_newline(example* ec)
+{
+  // if only index is constant namespace or no index
+  return ((ec->indices.size() == 0) || 
+          ((ec->indices.size() == 1) &&
+           (ec->indices.last() == constant_namespace)));
+}
 
 #endif