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#ifndef CLASSIFIERS_H
#define CLASSIFIERS_H
#include "config.h"
#include "mem_pool.h"
#include "statfile.h"
#include "tokenizers/tokenizers.h"
/* Consider this value as 0 */
#define ALPHA 0.0001
struct classifier_config;
struct worker_task;
struct classifier_ctx {
memory_pool_t *pool;
GHashTable *results;
gboolean debug;
struct classifier_config *cfg;
GMutex *mtx;
};
struct classify_weight {
const char *name;
long double weight;
};
/* Common classifier structure */
struct classifier {
char *name;
struct classifier_ctx* (*init_func)(memory_pool_t *pool, struct classifier_config *cf);
gboolean (*classify_func)(struct classifier_ctx* ctx, statfile_pool_t *pool, GTree *input, struct worker_task *task);
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 worker_task *task, gboolean is_spam, GError **err);
GList* (*weights_func)(struct classifier_ctx* ctx, statfile_pool_t *pool, GTree *input, struct worker_task *task);
};
/* Get classifier structure by name or return NULL if this name is not found */
struct classifier* get_classifier (char *name);
/* Winnow algorithm */
struct classifier_ctx* winnow_init (memory_pool_t *pool, struct classifier_config *cf);
gboolean winnow_classify (struct classifier_ctx* ctx, statfile_pool_t *pool, GTree *input, struct worker_task *task);
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 worker_task *task, gboolean is_spam, GError **err);
GList *winnow_weights (struct classifier_ctx* ctx, statfile_pool_t *pool, GTree *input, struct worker_task *task);
/* Bayes algorithm */
struct classifier_ctx* bayes_init (memory_pool_t *pool, struct classifier_config *cf);
gboolean bayes_classify (struct classifier_ctx* ctx, statfile_pool_t *pool, GTree *input, struct worker_task *task);
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 worker_task *task, gboolean is_spam, GError **err);
GList *bayes_weights (struct classifier_ctx* ctx, statfile_pool_t *pool, GTree *input, struct worker_task *task);
/* Array of all defined classifiers */
extern struct classifier classifiers[];
#endif
/*
* vi:ts=4
*/
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