now creating a linkable library

1 files changed, 41 insertions, 0 deletions

diff --git a/vowpalwabbit/sparse_dense.h b/vowpalwabbit/sparse_dense.h
new file mode 100644
index 00000000..649d7365
--- /dev/null
+++ b/vowpalwabbit/sparse_dense.h
@@ -0,0 +1,41 @@
+/*
+Copyright (c) 2009 Yahoo! Inc.  All rights reserved.  The copyrights
+embodied in the content of this file are licensed under the BSD
+(revised) open source license
+ */
+
+#ifndef SPARSE_DENSE_VECTOR_H
+#define SPARSE_DENSE_VECTOR_H
+
+#include <math.h>
+#include "parse_example.h"
+
+inline float sign(float w){ if (w < 0.) return -1.; else  return 1.;}
+
+inline float trunc_weight(float w, float gravity){
+  return (gravity < fabsf(w)) ? w - sign(w) * gravity : 0.;
+}
+
+float sd_add(weight* weights, size_t mask, feature* begin, feature* end);
+float sd_add_trunc(weight* weights, size_t mask, feature* begin, feature* end, float gravity);
+
+float sd_offset_add(weight* weights, size_t mask, feature* begin, feature* end, size_t offset);
+void sd_offset_update(weight* weights, size_t mask, feature* begin, feature* end, size_t offset, float update, float regularization);
+
+void quadratic(v_array<feature> &f, const v_array<feature> &first_part, 
+               const v_array<feature> &second_part, size_t thread_mask);
+
+float one_of_quad_predict(v_array<feature> &page_features, feature& offer_feature, weight* weights, size_t mask);
+
+float one_pf_quad_predict(weight* weights, feature& page_feature, v_array<feature> &offer_features, size_t mask);
+
+float one_pf_quad_predict_trunc(weight* weights, feature& f, v_array<feature> &cross_features, size_t mask, float gravity);
+
+float offset_quad_predict(weight* weights, feature& page_feature, v_array<feature> &offer_features, size_t mask, size_t offset);
+
+void print_audit_quad(weight* weights, audit_data& page_feature, v_array<audit_data> &offer_features, size_t mask);
+void print_quad(weight* weights, feature& page_feature, v_array<feature> &offer_features, size_t mask);
+
+float single_quad_weight(weight* weights, feature& page_feature, feature* offer_feature, size_t mask);
+
+#endif