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/**
 * @file ngram_model_set.h Set of language models.
 * @author David Huggins-Daines <dhuggins@cs.cmu.edu>
 */

#ifndef __NGRAM_MODEL_SET_H__
#define __NGRAM_MODEL_SET_H__

#include "ngram_model_internal.h"
#include "lm3g_model.h"

/**
 * Subclass of ngram_model for grouping language models.
 */
typedef struct ngram_model_set_s {
    ngram_model_t base;  /**< Base ngram_model_t structure. */

    int32 n_models;      /**< Number of models in this set. */
    int32 cur;           /**< Currently selected model, or -1 for none. */
    ngram_model_t **lms; /**< Language models in this set. */
    char **names;        /**< Names for language models. */
    int32 *lweights;     /**< Log interpolation weights. */
    int32 **widmap;      /**< Word ID mapping for submodels. */
    int32 *maphist;      /**< Word ID mapping for N-Gram history. */
} ngram_model_set_t;

/**
 * Iterator over a model set.
 */
struct ngram_model_set_iter_s {
    ngram_model_set_t *set;
    int32 cur;
};

#endif /* __NGRAM_MODEL_SET_H__ */