| 1 | /**************************************************************************
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| 2 | *
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| 3 | * text_get.h -- Function for reading documents from the compressed text
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| 4 | * Copyright (C) 1994 Neil Sharman
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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: text_get.h 25147 2012-02-28 00:59:00Z kjdon $
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| 21 | *
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| 22 | **************************************************************************/
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| 23 |
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| 24 | #ifndef H_TEXT_GET
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| 25 | #define H_TEXT_GET
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| 26 |
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| 27 |
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| 28 |
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| 29 | /* FetchDocStart ()
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| 30 | * Reads into DocEnt the starting position of the document in the *.text file
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| 31 | * Where the first document is document number 1
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| 32 | * It returns the true weight of the document.
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| 33 | */
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| 34 | double FetchDocStart (query_data * qd, mg_u_long DN, mg_u_long * seek_pos, mg_u_long * len);
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| 35 |
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| 36 | mg_u_long FetchInitialParagraph (text_data * td, mg_u_long ParaNum);
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| 37 |
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| 38 |
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| 39 | /* FetchCompressed ()
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| 40 | * Reads into buffer DocBuff the compressed form of document DocNum.
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| 41 | * Where the first document is document number 1
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| 42 | */
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| 43 | int FetchCompressed (query_data * qd, char **DocBuff, DocEntry * DocEnt);
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| 44 |
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| 45 | text_data *LoadTextData (File * text, File * text_idx_wgt, File * text_idx);
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| 46 |
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| 47 | void FreeTextData (text_data * td);
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| 48 |
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| 49 | int GetPosLens (query_data * qd, DocEntry * Docs, int num);
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| 50 |
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| 51 | int LoadBuffers (query_data * qd, DocEntry * Docs, int max_mem, int num);
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| 52 |
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| 53 | void FreeBuffers (query_data * qd, DocEntry * Docs, int num);
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| 54 |
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| 55 |
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| 56 |
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| 57 | compression_dict *LoadCompDict (File * text_comp_dict,
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| 58 | File * text_aux_dict,
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| 59 | File * text_fast_comp_dict);
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| 60 |
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| 61 | void FreeCompDict (compression_dict * cd);
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| 62 |
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| 63 |
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| 64 | int DecodeText (compression_dict * cd,
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| 65 | u_char * s_in, int l_in, u_char * s_out, int *l_out);
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| 66 |
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| 67 | #endif
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