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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_INTERNAL_H__
+#define __JSGF_INTERNAL_H__
+
+/**
+ * @file jsgf_internal.h Internal definitions for JSGF grammar compiler
+ */
+
+#include <stdio.h>
+
+#include <sphinxbase/hash_table.h>
+#include <sphinxbase/glist.h>
+#include <sphinxbase/fsg_model.h>
+#include <sphinxbase/logmath.h>
+#include <sphinxbase/strfuncs.h>
+#include <sphinxbase/jsgf.h>
+
+
+/* Flex uses strdup which is missing on WinCE */
+#if defined(_WIN32) || defined(_WIN32_WCE)
+#define strdup _strdup
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#if 0
+/* Fool Emacs. */
+}
+#endif
+
+#define YY_NO_INPUT /* Silence a compiler warning. */
+
+typedef struct jsgf_rhs_s jsgf_rhs_t;
+typedef struct jsgf_atom_s jsgf_atom_t;
+typedef struct jsgf_link_s jsgf_link_t;
+typedef struct jsgf_rule_stack_s jsgf_rule_stack_t;
+
+struct jsgf_s {
+ char *version; /**< JSGF version (from header) */
+ char *charset; /**< JSGF charset (default UTF-8) */
+ char *locale; /**< JSGF locale (default C) */
+ char *name; /**< Grammar name */
+
+ hash_table_t *rules; /**< Defined or imported rules in this grammar. */
+ hash_table_t *imports; /**< Pointers to imported grammars. */
+ jsgf_t *parent; /**< Parent grammar (if this is an imported one) */
+ glist_t searchpath; /**< List of directories to search for grammars. */
+
+ /* Scratch variables for FSG conversion. */
+ int nstate; /**< Number of generated states. */
+ glist_t links; /**< Generated FSG links. */
+ glist_t rulestack; /**< Stack of currently expanded rules. */
+};
+
+/* A type to keep track of the stack of rules currently being expanded. */
+struct jsgf_rule_stack_s {
+ jsgf_rule_t *rule; /**< The rule being expanded */
+ int entry; /**< The entry-state for this expansion */
+};
+
+struct jsgf_rule_s {
+ int refcnt; /**< Reference count. */
+ char *name; /**< Rule name (NULL for an alternation/grouping) */
+ int is_public; /**< Is this rule marked 'public'? */
+ jsgf_rhs_t *rhs; /**< Expansion */
+};
+
+struct jsgf_rhs_s {
+ glist_t atoms; /**< Sequence of items */
+ jsgf_rhs_t *alt; /**< Linked list of alternates */
+};
+
+struct jsgf_atom_s {
+ char *name; /**< Rule or token name */
+ glist_t tags; /**< Tags, if any (glist_t of char *) */
+ float weight; /**< Weight (default 1) */
+};
+
+struct jsgf_link_s {
+ jsgf_atom_t *atom; /**< Name, tags, weight */
+ int from; /**< From state */
+ int to; /**< To state */
+};
+
+#define jsgf_atom_is_rule(atom) ((atom)->name[0] == '<')
+
+void jsgf_add_link(jsgf_t *grammar, jsgf_atom_t *atom, int from, int to);
+jsgf_atom_t *jsgf_atom_new(char *name, float weight);
+jsgf_atom_t *jsgf_kleene_new(jsgf_t *jsgf, jsgf_atom_t *atom, int plus);
+jsgf_rule_t *jsgf_optional_new(jsgf_t *jsgf, jsgf_rhs_t *exp);
+jsgf_rule_t *jsgf_define_rule(jsgf_t *jsgf, char *name, jsgf_rhs_t *rhs, int is_public);
+jsgf_rule_t *jsgf_import_rule(jsgf_t *jsgf, char *name);
+
+int jsgf_atom_free(jsgf_atom_t *atom);
+int jsgf_rule_free(jsgf_rule_t *rule);
+jsgf_rule_t *jsgf_rule_retain(jsgf_rule_t *rule);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* __JSGF_H__ */