TimeKeeper/audio/flite-2.0.0-release/include/cst_cart.h

/*************************************************************************/
/*                                                                       */
/*                  Language Technologies Institute                      */
/*                     Carnegie Mellon University                        */
/*                        Copyright (c) 2000                             */
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/*                                                                       */
/*************************************************************************/
/*             Author:  Alan W Black (awb@cs.cmu.edu)                    */
/*               Date:  January 2000                                     */
/*************************************************************************/
/*                                                                       */
/*  CART tree support                                                    */
/*                                                                       */
/*************************************************************************/
#ifndef _CST_CART_H__
#define _CST_CART_H__

#include "cst_file.h"
#include "cst_val.h"
#include "cst_features.h"
#include "cst_item.h"
#include "cst_relation.h"

#define CST_CART_OP_NONE    255
#define CST_CART_OP_LEAF    255
#define CST_CART_OP_IS      0
#define CST_CART_OP_IN      1
#define CST_CART_OP_LESS    2
#define CST_CART_OP_GREATER 3
#define CST_CART_OP_MATCHES 4
#define CST_CART_OP_EQUALS  5

typedef struct cst_cart_node_struct {
    unsigned char feat;
    unsigned char op;
    /* yes is always the next node */
    unsigned short no_node;  /* or answer index */
    const cst_val *val;  
} cst_cart_node;

typedef struct cst_cart_struct {
    const cst_cart_node *rule_table;
    const char * const *feat_table;
} cst_cart;

void delete_cart(cst_cart *c);

CST_VAL_USER_TYPE_DCLS(cart,cst_cart)

const cst_val *cart_interpret(cst_item *item, const cst_cart *tree);

#endif