| 1 | /**************************************************************************
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| 2 | *
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| 3 | * lists.h -- List processing functions for boolean queries
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| 4 | * Copyright (C) 1994 Neil Sharman, Alistair Moffat and Lachlan Andrew
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| 5 | *
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| 6 | * This program is free software; you can redistribute it and/or modify
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| 7 | * it under the terms of the GNU General Public License as published by
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| 8 | * the Free Software Foundation; either version 2 of the License, or
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| 9 | * (at your option) any later version.
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| 10 | *
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| 11 | * This program is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | * GNU General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU General Public License
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| 17 | * along with this program; if not, write to the Free Software
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| 18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 19 | *
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| 20 | * $Id: lists.h 3745 2003-02-20 21:20:24Z mdewsnip $
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| 21 | *
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| 22 | **************************************************************************/
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| 23 |
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| 24 |
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| 25 | #ifndef H_LISTS
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| 26 | #define H_LISTS
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| 27 |
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| 28 |
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| 29 |
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| 30 | typedef struct DocEntry
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| 31 | {
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| 32 | float Weight;
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| 33 | int DocNum;
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| 34 | unsigned long SeekPos; /* position in the text file in bytes */
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| 35 | unsigned long Len; /* length of the document in bytes */
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| 36 | char *CompTextBuffer;
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| 37 | struct DocEntry *Next;
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| 38 | short or_included; /*[TS:Mar/95] whether included in an AND of ORed-terms */
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| 39 | }
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| 40 | DocEntry;
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| 41 |
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| 42 | typedef struct DocList
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| 43 | {
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| 44 | int num;
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| 45 | int total_retrieved; /* valid if > 0 */
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| 46 | int is_approx; /* whether total_retrieved is approximate */
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| 47 | DocEntry DE[1];
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| 48 | }
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| 49 | DocList;
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| 50 |
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| 51 | DocList *MakeDocList (int num);
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| 52 | DocList *ResizeDocList (DocList * d, int num);
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| 53 | DocList *IntersectLists (DocList * List1, DocList * List2);
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| 54 | DocList *DiffLists (DocList * List1, DocList * List2);
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| 55 | DocList *MergeLists (DocList * List1, DocList * List2);
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| 56 |
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| 57 |
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| 58 |
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| 59 | #endif
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