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86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
/* -*-mode: C; fill-column: 78; c-basic-offset: 4;-*- */
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/*
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* Copyright 1998-2001 by Eric House (xwords@eehouse.org). All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef _DAWG_H_
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#define _DAWG_H_
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#include "xptypes.h"
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/*
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* the bits field has five bits for the character (0-based rather than
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* 'a'-based, of course; one bit each indicating whether the edge may
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* be terminal and whether it's the last edge of a sub-array; and a final
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* bit that's overflow from the highByte field allowing indices to be in
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* the range 0-(2^^17)-1
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*/
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#define LETTERMASK_OLD 0x1f
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#define ACCEPTINGMASK_OLD 0x20
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#define LASTEDGEMASK_OLD 0x40
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#define EXTRABITMASK_OLD 0x80
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#define LETTERMASK_NEW_4 0x3f
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#define LETTERMASK_NEW_3 0x1f
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#define ACCEPTINGMASK_NEW 0x80
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#define LASTEDGEMASK_NEW 0x40
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/* This guy doesn't exist in 4-byte case */
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#define EXTRABITMASK_NEW 0x20
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#define OLD_THREE_FIELDS \
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XP_U8 highByte; \
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XP_U8 lowByte; \
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XP_U8 bits
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typedef struct array_edge_old {
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OLD_THREE_FIELDS;
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} array_edge_old;
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typedef struct array_edge_new {
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OLD_THREE_FIELDS;
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XP_U8 moreBits;
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} array_edge_new;
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typedef XP_U8 array_edge;
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/* This thing exists only in current xwords dicts (on PalmOS); not sure if I
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* should do away with it.
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*/
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typedef struct dawg_header {
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unsigned long numWords;
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unsigned char firstEdgeRecNum;
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unsigned char charTableRecNum;
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unsigned char valTableRecNum;
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unsigned char reserved[3]; /* worst case this points to a new resource */
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unsigned short flags;
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} dawg_header;
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/* Part of xwords3 dictionaries on PalmOS */
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typedef struct Xloc_header {
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unsigned char langCodeFlags; /* can't do bitfields; gcc for pilot and x86
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seem to generate different code */
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unsigned char padding; /* ptrs to the shorts in Xloc_specialEntry
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will otherwise be odd */
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} Xloc_header;
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typedef struct Xloc_specialEntry {
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unsigned char textVersion[4]; /* string can be up to 3 chars long */
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short hasLarge;
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short hasSmall;
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} Xloc_specialEntry;
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#endif /* _DAWG_H_ */
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