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/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* ====================================================================
* Copyright (c) 2007 Carnegie Mellon University. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* This work was supported in part by funding from the Defense Advanced
* Research Projects Agency and the National Science Foundation of the
* United States of America, and the CMU Sphinx Speech Consortium.
*
* THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
* NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ====================================================================
*
*/
#ifndef __JSGF_H__
#define __JSGF_H__
/**
* @file jsgf.h JSGF grammar compiler
*
* This file defines the data structures for parsing JSGF grammars
* into Sphinx finite-state grammars.
**/
#include <stdio.h>
/* Win32/WinCE DLL gunk */
#include <sphinxbase/sphinxbase_export.h>
#include <sphinxbase/hash_table.h>
#include <sphinxbase/fsg_model.h>
#include <sphinxbase/logmath.h>
#ifdef __cplusplus
extern "C" {
#endif
#if 0
/* Fool Emacs. */
}
#endif
typedef struct jsgf_s jsgf_t;
typedef struct jsgf_rule_s jsgf_rule_t;
/**
* Create a new JSGF grammar.
*
* @param parent optional parent grammar for this one (NULL, usually).
* @return new JSGF grammar object, or NULL on failure.
*/
SPHINXBASE_EXPORT
jsgf_t *jsgf_grammar_new(jsgf_t *parent);
/**
* Parse a JSGF grammar from a file.
*
* @param filename the name of the file to parse.
* @param parent optional parent grammar for this one (NULL, usually).
* @return new JSGF grammar object, or NULL on failure.
*/
SPHINXBASE_EXPORT
jsgf_t *jsgf_parse_file(const char *filename, jsgf_t *parent);
/**
* Parse a JSGF grammar from a string.
*
* @param 0-terminated string with grammar.
* @param parent optional parent grammar for this one (NULL, usually).
* @return new JSGF grammar object, or NULL on failure.
*/
SPHINXBASE_EXPORT
jsgf_t *jsgf_parse_string(const char *string, jsgf_t *parent);
/**
* Get the grammar name from the file.
*/
SPHINXBASE_EXPORT
char const *jsgf_grammar_name(jsgf_t *jsgf);
/**
* Free a JSGF grammar.
*/
SPHINXBASE_EXPORT
void jsgf_grammar_free(jsgf_t *jsgf);
/**
* Iterator over rules in a grammar.
*/
typedef hash_iter_t jsgf_rule_iter_t;
/**
* Get an iterator over all rules in a grammar.
*/
SPHINXBASE_EXPORT
jsgf_rule_iter_t *jsgf_rule_iter(jsgf_t *grammar);
/**
* Advance an iterator to the next rule in the grammar.
*/
#define jsgf_rule_iter_next(itor) hash_table_iter_next(itor)
/**
* Get the current rule in a rule iterator.
*/
#define jsgf_rule_iter_rule(itor) ((jsgf_rule_t *)(itor)->ent->val)
/**
* Free a rule iterator (if the end hasn't been reached).
*/
#define jsgf_rule_iter_free(itor) hash_table_iter_free(itor)
/**
* Get a rule by name from a grammar. Name should not contain brackets.
*/
SPHINXBASE_EXPORT
jsgf_rule_t *jsgf_get_rule(jsgf_t *grammar, const char *name);
/**
* Returns the first public rule of the grammar
*/
SPHINXBASE_EXPORT
jsgf_rule_t *jsgf_get_public_rule(jsgf_t *grammar);
/**
* Get the rule name from a rule.
*/
SPHINXBASE_EXPORT
char const *jsgf_rule_name(jsgf_rule_t *rule);
/**
* Test if a rule is public or not.
*/
SPHINXBASE_EXPORT
int jsgf_rule_public(jsgf_rule_t *rule);
/**
* Build a Sphinx FSG object from a JSGF rule.
*/
SPHINXBASE_EXPORT
fsg_model_t *jsgf_build_fsg(jsgf_t *grammar, jsgf_rule_t *rule,
logmath_t *lmath, float32 lw);
/**
* Build a Sphinx FSG object from a JSGF rule.
*
* This differs from jsgf_build_fsg() in that it does not do closure
* on epsilon transitions or any other postprocessing. For the time
* being this is necessary in order to write it to a file - the FSG
* code will be fixed soon.
*/
SPHINXBASE_EXPORT
fsg_model_t *jsgf_build_fsg_raw(jsgf_t *grammar, jsgf_rule_t *rule,
logmath_t *lmath, float32 lw);
/**
* Read JSGF from file and return FSG object from it.
*
* This function looks for a first public rule in jsgf and constructs JSGF from it.
*/
SPHINXBASE_EXPORT
fsg_model_t *jsgf_read_file(const char *file, logmath_t * lmath, float32 lw);
/**
* Read JSGF from string and return FSG object from it.
*
* This function looks for a first public rule in jsgf and constructs JSGF from it.
*/
SPHINXBASE_EXPORT
fsg_model_t *jsgf_read_string(const char *string, logmath_t * lmath, float32 lw);
/**
* Convert a JSGF rule to Sphinx FSG text form.
*
* This does a direct conversion without doing transitive closure on
* null transitions and so forth.
*/
SPHINXBASE_EXPORT
int jsgf_write_fsg(jsgf_t *grammar, jsgf_rule_t *rule, FILE *outfh);
#ifdef __cplusplus
}
#endif
#endif /* __JSGF_H__ */
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