1 /*************************************************************************/
2 /*                                                                       */
3 /*                  Language Technologies Institute                      */
4 /*                     Carnegie Mellon University                        */
5 /*                        Copyright (c) 1999                             */
6 /*                        All Rights Reserved.                           */
7 /*                                                                       */
8 /*  Permission is hereby granted, free of charge, to use and distribute  */
9 /*  this software and its documentation without restriction, including   */
10 /*  without limitation the rights to use, copy, modify, merge, publish,  */
11 /*  distribute, sublicense, and/or sell copies of this work, and to      */
12 /*  permit persons to whom this work is furnished to do so, subject to   */
13 /*  the following conditions:                                            */
14 /*   1. The code must retain the above copyright notice, this list of    */
15 /*      conditions and the following disclaimer.                         */
16 /*   2. Any modifications must be clearly marked as such.                */
17 /*   3. Original authors' names are not deleted.                         */
18 /*   4. The authors' names are not used to endorse or promote products   */
19 /*      derived from this software without specific prior written        */
20 /*      permission.                                                      */
21 /*                                                                       */
22 /*  CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK         */
23 /*  DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING      */
24 /*  ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT   */
25 /*  SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE      */
26 /*  FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES    */
27 /*  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN   */
28 /*  AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,          */
29 /*  ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF       */
30 /*  THIS SOFTWARE.                                                       */
31 /*                                                                       */
32 /*************************************************************************/
33 /*             Author:  Alan W Black (awb@cs.cmu.edu)                    */
34 /*               Date:  December 1999                                    */
35 /*************************************************************************/
36 /*                                                                       */
37 /*  Letter to sound rules                                                */
38 /*                                                                       */
39 /*************************************************************************/
40 #ifndef _CST_LTS_H__
41 #define _CST_LTS_H__
42 
43 #include "cst_val.h"
44 
45 typedef unsigned short cst_lts_addr;
46 typedef int cst_lts_phone;
47 typedef unsigned char  cst_lts_feat;
48 typedef unsigned char  cst_lts_letter;
49 typedef unsigned char  cst_lts_model;
50 
51 /* end of rule value */
52 #define CST_LTS_EOR 255
53 
54 typedef struct cst_lts_rules_struct {
55     char *name;
56     const cst_lts_addr *letter_index;  /* index into model first state */
57     const cst_lts_model *models;
58     const char * const * phone_table;
59     int context_window_size;
60     int context_extra_feats;
61     const char * const * letter_table;
62 } cst_lts_rules;
63 
64 /* Note this is designed to be 6 bytes */
65 typedef struct cst_lts_rule_struct {
66     cst_lts_feat   feat;
67     cst_lts_letter val;
68     cst_lts_addr   qtrue;
69     cst_lts_addr   qfalse;
70 } cst_lts_rule;
71 
72 cst_lts_rules *new_lts_rules();
73 
74 cst_val *lts_apply(const char *word,const char *feats,const cst_lts_rules *r);
75 cst_val *lts_apply_val(const cst_val *wlist,const char *feats,const cst_lts_rules *r);
76 
77 #endif
78 
79