From 8ce7df1eb4174dcca246c6800e26144cb86056c5 Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Mon, 10 Oct 2016 20:37:17 +0100
Subject: [Minor] Add method to get MSE for ANN

---
 src/lua/lua_fann.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/lua/lua_fann.c b/src/lua/lua_fann.c
index d1f187510..d6dd921e7 100644
--- a/src/lua/lua_fann.c
+++ b/src/lua/lua_fann.c
@@ -45,6 +45,7 @@ LUA_FUNCTION_DEF (fann, save);
 LUA_FUNCTION_DEF (fann, data);
 LUA_FUNCTION_DEF (fann, get_inputs);
 LUA_FUNCTION_DEF (fann, get_outputs);
+LUA_FUNCTION_DEF (fann, get_mse);
 LUA_FUNCTION_DEF (fann, dtor);
 
 static const struct luaL_reg fannlib_f[] = {
@@ -63,6 +64,7 @@ static const struct luaL_reg fannlib_m[] = {
 		LUA_INTERFACE_DEF (fann, data),
 		LUA_INTERFACE_DEF (fann, get_inputs),
 		LUA_INTERFACE_DEF (fann, get_outputs),
+		LUA_INTERFACE_DEF (fann, get_mse),
 		{"__gc", lua_fann_dtor},
 		{"__tostring", rspamd_lua_class_tostring},
 		{NULL, NULL}
@@ -492,6 +494,30 @@ lua_fann_get_outputs (lua_State *L)
 #endif
 }
 
+/***
+ * @method rspamd_fann:get_mse()
+ * Returns mean square error for ANN
+ * @return {number} MSE value
+ */
+static gint
+lua_fann_get_mse (lua_State *L)
+{
+#ifndef WITH_FANN
+	return 0;
+#else
+	struct fann *f = rspamd_lua_check_fann (L, 1);
+
+	if (f != NULL) {
+		lua_pushnumber (L, fann_get_MSE (f));
+	}
+	else {
+		lua_pushnil (L);
+	}
+
+	return 1;
+#endif
+}
+
 /***
  * @method rspamd_fann:save(fname)
  * Save fann to file named 'fname'
-- 
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