| 1 | /**************************************************************************
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| 2 | *
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| 3 | * perf_hash.h -- Perfect hashing functions
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| 4 | * Copyright (C) 1994 Bohdan S. Majewski and 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 | **************************************************************************/
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| 21 |
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| 22 | #ifndef H_PERF_HASH
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| 23 | #define H_PERF_HASH
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| 24 |
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| 25 |
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| 26 |
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| 27 |
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| 28 | struct tb_entry
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| 29 | {
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| 30 | long tb0, tb1, tb2;
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| 31 | };
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| 32 |
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| 33 | typedef struct
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| 34 | {
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| 35 | int MAX_L;
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| 36 | int MAX_N;
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| 37 | int MAX_M;
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| 38 | int MAX_CH;
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| 39 | u_char *translate;
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| 40 | int *g;
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| 41 | struct tb_entry **tb;
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| 42 | }
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| 43 | perf_hash_data;
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| 44 |
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| 45 | perf_hash_data *gen_hash_func (int num, u_char ** keys, int r);
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| 46 |
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| 47 | int perf_hash (perf_hash_data * phd, u_char * s);
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| 48 |
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| 49 | int write_perf_hash_data (FILE * f, perf_hash_data * phd);
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| 50 |
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| 51 | void free_perf_hash (perf_hash_data * phd);
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| 52 |
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| 53 | perf_hash_data *read_perf_hash_data (FILE * f);
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| 54 |
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| 55 | #endif
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