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141 lines
4.8 KiB
C
141 lines
4.8 KiB
C
/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
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/* ====================================================================
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* Copyright (c) 2007 Carnegie Mellon University. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* This work was supported in part by funding from the Defense Advanced
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* Research Projects Agency and the National Science Foundation of the
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* United States of America, and the CMU Sphinx Speech Consortium.
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*
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* THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
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* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
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* NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ====================================================================
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*
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*/
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#ifndef __JSGF_INTERNAL_H__
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#define __JSGF_INTERNAL_H__
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/**
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* @file jsgf_internal.h Internal definitions for JSGF grammar compiler
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*/
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#include <stdio.h>
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#include <sphinxbase/hash_table.h>
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#include <sphinxbase/glist.h>
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#include <sphinxbase/fsg_model.h>
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#include <sphinxbase/logmath.h>
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#include <sphinxbase/strfuncs.h>
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#include <sphinxbase/jsgf.h>
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/* Flex uses strdup which is missing on WinCE */
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#if defined(_WIN32) || defined(_WIN32_WCE)
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#define strdup _strdup
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if 0
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/* Fool Emacs. */
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}
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#endif
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#define YY_NO_INPUT /* Silence a compiler warning. */
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typedef struct jsgf_rhs_s jsgf_rhs_t;
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typedef struct jsgf_atom_s jsgf_atom_t;
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typedef struct jsgf_link_s jsgf_link_t;
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typedef struct jsgf_rule_stack_s jsgf_rule_stack_t;
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struct jsgf_s {
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char *version; /**< JSGF version (from header) */
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char *charset; /**< JSGF charset (default UTF-8) */
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char *locale; /**< JSGF locale (default C) */
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char *name; /**< Grammar name */
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hash_table_t *rules; /**< Defined or imported rules in this grammar. */
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hash_table_t *imports; /**< Pointers to imported grammars. */
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jsgf_t *parent; /**< Parent grammar (if this is an imported one) */
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glist_t searchpath; /**< List of directories to search for grammars. */
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/* Scratch variables for FSG conversion. */
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int nstate; /**< Number of generated states. */
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glist_t links; /**< Generated FSG links. */
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glist_t rulestack; /**< Stack of currently expanded rules. */
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};
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/* A type to keep track of the stack of rules currently being expanded. */
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struct jsgf_rule_stack_s {
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jsgf_rule_t *rule; /**< The rule being expanded */
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int entry; /**< The entry-state for this expansion */
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};
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struct jsgf_rule_s {
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int refcnt; /**< Reference count. */
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char *name; /**< Rule name (NULL for an alternation/grouping) */
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int is_public; /**< Is this rule marked 'public'? */
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jsgf_rhs_t *rhs; /**< Expansion */
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};
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struct jsgf_rhs_s {
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glist_t atoms; /**< Sequence of items */
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jsgf_rhs_t *alt; /**< Linked list of alternates */
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};
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struct jsgf_atom_s {
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char *name; /**< Rule or token name */
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glist_t tags; /**< Tags, if any (glist_t of char *) */
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float weight; /**< Weight (default 1) */
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};
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struct jsgf_link_s {
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jsgf_atom_t *atom; /**< Name, tags, weight */
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int from; /**< From state */
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int to; /**< To state */
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};
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#define jsgf_atom_is_rule(atom) ((atom)->name[0] == '<')
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void jsgf_add_link(jsgf_t *grammar, jsgf_atom_t *atom, int from, int to);
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jsgf_atom_t *jsgf_atom_new(char *name, float weight);
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jsgf_atom_t *jsgf_kleene_new(jsgf_t *jsgf, jsgf_atom_t *atom, int plus);
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jsgf_rule_t *jsgf_optional_new(jsgf_t *jsgf, jsgf_rhs_t *exp);
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jsgf_rule_t *jsgf_define_rule(jsgf_t *jsgf, char *name, jsgf_rhs_t *rhs, int is_public);
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jsgf_rule_t *jsgf_import_rule(jsgf_t *jsgf, char *name);
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int jsgf_atom_free(jsgf_atom_t *atom);
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int jsgf_rule_free(jsgf_rule_t *rule);
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jsgf_rule_t *jsgf_rule_retain(jsgf_rule_t *rule);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __JSGF_H__ */
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