xwords/xwords4/common/dictiter.h
Eric House 145317426d Fix prefix matching to accept letters constituting the first part of a
digraph tile when at the end of a prefix so that e.g. GORIL in Catalan
will list GORIL·LA (rather than nothing since GORIL, ending with the L
tile, is not a prefix.)
2012-08-27 21:50:09 -07:00

84 lines
2.5 KiB
C

/* -*- compile-command: "cd ../linux && make MEMDEBUG=TRUE -j3"; -*- */
/*
* Copyright 1997 - 2011 by Eric House (xwords@eehouse.org). All rights
* reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __DICTITER_H__
#define __DICTITER_H__
#ifdef XWFEATURE_WALKDICT
#include "comtypes.h"
#include "dawg.h"
#include "model.h"
#include "mempool.h"
#ifdef CPLUS
extern "C" {
#endif
#define MAX_COLS_DICT 15
/* API for iterating over a dict */
typedef XP_S32 DictPosition;
typedef struct _DictIter {
XP_U16 nEdges;
array_edge* edges[MAX_COLS_DICT];
#ifdef XWFEATURE_WALKDICT_FILTER
XP_U16 min;
XP_U16 max;
#endif
#ifdef DEBUG
XP_U32 guard;
#endif
const DictionaryCtxt* dict;
XP_U32 nWords;
DictPosition position;
} DictIter;
typedef struct _IndexData {
DictPosition* indices;
Tile* prefixes;
XP_U16 count; /* in-out: must indicate others are large enough */
} IndexData;
typedef struct _LengthsArray {
XP_U32 lens[MAX_COLS_DICT+1];
} LengthsArray;
void dict_initIter( DictIter* iter, const DictionaryCtxt* dict,
XP_U16 min, XP_U16 max );
XP_U32 dict_countWords( const DictIter* iter, LengthsArray* lens );
void dict_makeIndex( const DictIter* iter, XP_U16 depth, IndexData* data );
XP_Bool dict_firstWord( DictIter* iter );
XP_Bool dict_lastWord( DictIter* iter );
XP_Bool dict_getNextWord( DictIter* iter );
XP_Bool dict_getPrevWord( DictIter* iter );
XP_Bool dict_getNthWord( DictIter* iter, DictPosition position, XP_U16 depth,
const IndexData* data );
void dict_wordToString( const DictIter* iter, XP_UCHAR* buf, XP_U16 buflen );
XP_S16 dict_findStartsWith( DictIter* iter, const XP_UCHAR* prefix );
DictPosition dict_getPosition( const DictIter* iter );
#ifdef CPLUS
}
#endif
#endif /* XWFEATURE_WALKDICT */
#endif