1 files changed, 111 insertions, 0 deletions
diff --git a/src/libstat/classifiers.h b/src/libstat/classifiers.h
new file mode 100644
index 000000000..fd1b63bcf
--- /dev/null
+++ b/src/libstat/classifiers.h
@@ -0,0 +1,111 @@
+#ifndef CLASSIFIERS_H
+#define CLASSIFIERS_H
+
+#include "config.h"
+#include "mem_pool.h"
+#include "statfile.h"
+#include "tokenizers.h"
+#include <lua.h>
+
+/* Consider this value as 0 */
+#define ALPHA 0.0001
+
+struct rspamd_classifier_config;
+struct rspamd_task;
+
+struct classifier_ctx {
+	rspamd_mempool_t *pool;
+	GHashTable *results;
+	gboolean debug;
+	struct rspamd_classifier_config *cfg;
+};
+
+struct classify_weight {
+	const char *name;
+	long double weight;
+};
+
+/* Common classifier structure */
+struct classifier {
+	char *name;
+	struct classifier_ctx * (*init_func)(rspamd_mempool_t *pool,
+		struct rspamd_classifier_config *cf);
+	gboolean (*classify_func)(struct classifier_ctx * ctx,
+		statfile_pool_t *pool, GTree *input, struct rspamd_task *task,
+		lua_State *L);
+	gboolean (*learn_func)(struct classifier_ctx * ctx, statfile_pool_t *pool,
+		const char *symbol, GTree *input, gboolean in_class,
+		double *sum, double multiplier, GError **err);
+	gboolean (*learn_spam_func)(struct classifier_ctx * ctx,
+		statfile_pool_t *pool,
+		GTree *input, struct rspamd_task *task, gboolean is_spam, lua_State *L,
+		GError **err);
+	GList * (*weights_func)(struct classifier_ctx * ctx, statfile_pool_t *pool,
+		GTree *input, struct rspamd_task *task);
+};
+
+/* Get classifier structure by name or return NULL if this name is not found */
+struct classifier * get_classifier (const char *name);
+
+/* Winnow algorithm */
+struct classifier_ctx * winnow_init (rspamd_mempool_t *pool,
+	struct rspamd_classifier_config *cf);
+gboolean winnow_classify (struct classifier_ctx * ctx,
+	statfile_pool_t *pool,
+	GTree *input,
+	struct rspamd_task *task,
+	lua_State *L);
+gboolean winnow_learn (struct classifier_ctx * ctx,
+	statfile_pool_t *pool,
+	const char *symbol,
+	GTree *input,
+	gboolean in_class,
+	double *sum,
+	double multiplier,
+	GError **err);
+gboolean winnow_learn_spam (struct classifier_ctx * ctx,
+	statfile_pool_t *pool,
+	GTree *input,
+	struct rspamd_task *task,
+	gboolean is_spam,
+	lua_State *L,
+	GError **err);
+GList * winnow_weights (struct classifier_ctx * ctx,
+	statfile_pool_t *pool,
+	GTree *input,
+	struct rspamd_task *task);
+
+/* Bayes algorithm */
+struct classifier_ctx * bayes_init (rspamd_mempool_t *pool,
+	struct rspamd_classifier_config *cf);
+gboolean bayes_classify (struct classifier_ctx * ctx,
+	statfile_pool_t *pool,
+	GTree *input,
+	struct rspamd_task *task,
+	lua_State *L);
+gboolean bayes_learn (struct classifier_ctx * ctx,
+	statfile_pool_t *pool,
+	const char *symbol,
+	GTree *input,
+	gboolean in_class,
+	double *sum,
+	double multiplier,
+	GError **err);
+gboolean bayes_learn_spam (struct classifier_ctx * ctx,
+	statfile_pool_t *pool,
+	GTree *input,
+	struct rspamd_task *task,
+	gboolean is_spam,
+	lua_State *L,
+	GError **err);
+GList * bayes_weights (struct classifier_ctx * ctx,
+	statfile_pool_t *pool,
+	GTree *input,
+	struct rspamd_task *task);
+/* Array of all defined classifiers */
+extern struct classifier classifiers[];
+
+#endif
+/*
+ * vi:ts=4
+ */