[3365] | 1 | /**************************************************************************
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| 2 | *
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| 3 | * mgpp_compression_dict.cpp -- Routines for creating compression dictionary
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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 | **************************************************************************/
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| 21 |
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| 22 | #define _XOPEN_SOURCE 1
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[19822] | 23 | // This was added for Solaris, but it makes things worse on Solaris for me...
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| 24 | // #define _XOPEN_SOURCE_EXTENDED 1
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[3365] | 25 |
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| 26 | // need this to avoid bizarre compiler problems under VC++ 6.0
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| 27 | #if defined (__WIN32__) && !defined (GSDL_USE_IOS_H)
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| 28 | # include <iostream>
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| 29 | #endif
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| 30 |
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| 31 | /* getopt is in posix.2, so cygwin should have it in unistd, but doesn't */
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| 32 | #if defined (__WIN32__) || defined (__CYGWIN__)
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| 33 | # include "getopt_old.h"
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| 34 | #else
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| 35 | # include <unistd.h>
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| 36 | #endif
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| 37 |
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| 38 | #include "sysfuncs.h"
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| 39 | #include "memlib.h"
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| 40 | #include "messages.h"
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| 41 | #include "local_strings.h"
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| 42 | #include "bitio_gen.h"
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| 43 | #include "bitio_m_stdio.h"
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| 44 | #include "mgheap.h"
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| 45 | #include "netorder.h" /* [RPAP - Jan 97: Endian Ordering] */
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| 46 |
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| 47 | #include "mg_files.h"
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| 48 | #include "locallib.h"
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| 49 | #include "invf.h"
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| 50 | #include "text.h"
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| 51 | #include "words.h"
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| 52 | #include "mg.h"
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| 53 | #include "WordData.h"
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| 54 |
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[25147] | 55 | #define MAXBITS (sizeof(mg_u_long) * 8)
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[3365] | 56 |
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| 57 | #define is_power_of_two(a) ((a) != 0 && (((a) & ((a)-1)) == 0))
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| 58 |
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| 59 | #define MAX_RECALCULATIONS 100
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| 60 |
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| 61 | typedef struct DictWordData : public WordData
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| 62 | {
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| 63 | float saving;
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| 64 | float char_bit_cost;
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[25147] | 65 | mg_u_long num_trans;
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[3365] | 66 | u_char *word;
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| 67 | }
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| 68 | DictWordData;
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| 69 |
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| 70 | static DictWordData *Words[2];
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[25147] | 71 | static mg_u_long Num[2];
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| 72 | static mg_u_long chars[2];
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[3365] | 73 |
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| 74 | #define KIND(p) (((p) >= Words[0] && (p) < Words[0] + Num[0]) ? 0 : 1)
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| 75 | #define IsWord(p) (((p) >= Words[1] && (p) < Words[1] + Num[1]) ? 1 : 0)
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| 76 | #define IsNonWord(p) (((p) >= Words[0] && (p) < Words[0] + Num[0]) ? 1 : 0)
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| 77 |
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| 78 |
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| 79 | typedef struct DictData
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| 80 | {
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| 81 | DictWordData **wd;
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[25147] | 82 | mg_u_long num_wds;
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| 83 | mg_u_long chars;
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[3365] | 84 | }
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| 85 | DictData;
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| 86 |
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| 87 | typedef DictData DictInfo[2];
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| 88 |
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| 89 | static DictInfo keep, discard, all;
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| 90 | static compression_stats_header csh;
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| 91 |
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[25147] | 92 | static char *file_name = (char*)"";
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| 93 | static mg_u_long novel_method = MG_NOVEL_HUFFMAN_CHARS;
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[3365] | 94 |
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| 95 |
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| 96 | static void ReadInWords (char *);
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| 97 | static void Select_on (int k, heap_comp hc);
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| 98 | static void Method3 (int k);
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| 99 | static void Select_all (void);
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[25147] | 100 | static mg_u_long WriteOutWords (char *, mg_u_long, int);
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[3365] | 101 | static int DecFreqIncWL (void *a, void *b);
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| 102 | static int OccuranceOrder (void *a, void *b);
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| 103 |
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| 104 |
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| 105 |
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| 106 | int main (int argc, char **argv)
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| 107 | {
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| 108 | int ch;
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| 109 | char type = 'C';
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| 110 | char mode = '0';
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| 111 | int lookback = 2;
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| 112 | double k = 0;
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[25147] | 113 | mg_u_long mem_reqd;
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[3365] | 114 | opterr = 0;
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| 115 | msg_prefix = argv[0];
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| 116 | while ((ch = getopt (argc, argv, "0123CPSf:d:l:hk:HDY")) != -1)
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| 117 | switch (ch)
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| 118 | {
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| 119 | case 'H':
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| 120 | novel_method = MG_NOVEL_HUFFMAN_CHARS;
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| 121 | break;
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| 122 | case 'D':
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| 123 | novel_method = MG_NOVEL_DELTA;
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| 124 | break;
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| 125 | case 'Y':
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| 126 | novel_method = MG_NOVEL_HYBRID;
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| 127 | break;
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| 128 | case 'f': /* input file */
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| 129 | file_name = optarg;
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| 130 | break;
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| 131 | case 'd':
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| 132 | set_basepath (optarg);
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| 133 | break;
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| 134 | case 'C':
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| 135 | case 'P':
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| 136 | case 'S':
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| 137 | type = ch;
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| 138 | break;
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| 139 | case '0':
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| 140 | case '1':
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| 141 | case '2':
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| 142 | case '3':
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| 143 | mode = ch;
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| 144 | break;
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| 145 | case 'l':
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| 146 | lookback = atoi (optarg);
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| 147 | if (!is_power_of_two (lookback))
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| 148 | FatalError (1, "The lookback value must be a power of 2");
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| 149 | lookback = floorlog_2 (lookback);
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| 150 | break;
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| 151 | case 'k':
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| 152 | k = atof (optarg) * 1024;
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| 153 | break;
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| 154 | case 'h':
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| 155 | case '?':
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| 156 | fprintf (stderr, "usage: %s [-l lookback] [-f input_file]"
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| 157 | "[-d data directory] [-h] [-0|-1|-2|-3] [-C|-P|-S] [-k mem (Kb)]\n",
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| 158 | argv[0]);
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| 159 | exit (1);
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| 160 | }
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| 161 |
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| 162 | ReadInWords (file_name);
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| 163 |
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| 164 | if (type == 'C')
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| 165 | {
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| 166 | Select_all ();
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| 167 | mem_reqd = WriteOutWords (file_name, MG_COMPLETE_DICTIONARY, lookback);
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| 168 | }
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| 169 | else
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| 170 | {
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| 171 | switch (mode)
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| 172 | {
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| 173 | case '0':
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| 174 | Select_all ();
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| 175 | break;
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| 176 | case '1':
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| 177 | #ifndef SILENT
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| 178 | Message ("Dictionary limit of %.2f Kb", k / 1024);
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| 179 | #endif
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| 180 | Select_on ((int) k, OccuranceOrder);
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| 181 | break;
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| 182 | case '2':
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| 183 | #ifndef SILENT
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| 184 | Message ("Dictionary limit of %.2f Kb", k / 1024);
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| 185 | #endif
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| 186 | Select_on ((int) k, DecFreqIncWL);
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| 187 | break;
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| 188 | case '3':
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| 189 | #ifndef SILENT
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| 190 | Message ("Dictionary limit of %.2f Kb", k / 1024);
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| 191 | #endif
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| 192 | Method3 ((int) k);
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| 193 | break;
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| 194 | }
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| 195 | if (type == 'P')
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| 196 | {
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| 197 | mem_reqd = WriteOutWords (file_name, MG_PARTIAL_DICTIONARY, lookback);
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| 198 | }
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| 199 | else
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| 200 | {
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| 201 | mem_reqd = WriteOutWords (file_name, MG_SEED_DICTIONARY, lookback);
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| 202 | }
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| 203 | }
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| 204 |
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| 205 | #ifndef SILENT
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| 206 | Message ("Num words : %8u -> %8u\n", Num[1], keep[1].num_wds);
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| 207 | Message ("Num non-words : %8u -> %8u\n", Num[0], keep[0].num_wds);
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| 208 | Message ("Chars of words : %8u -> %8u\n", chars[1], keep[1].chars);
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| 209 | Message ("Chars of non-words : %8u -> %8u\n", chars[0], keep[0].chars);
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| 210 | Message ("Mem usage : %8u -> %8u\n",
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| 211 | (Num[0] + Num[1]) * sizeof (char *) + chars[0] + chars[1],
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| 212 | (keep[0].num_wds + keep[1].num_wds) * sizeof (char *) +
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| 213 | keep[0].chars + keep[1].chars);
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| 214 | Message ("Actual mem required : %8u\n", mem_reqd);
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| 215 | #endif
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| 216 | return (0);
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| 217 | }
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| 218 |
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| 219 |
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| 220 |
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| 221 |
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| 222 | static void
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| 223 | ReadInWords (char *filename)
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| 224 | {
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| 225 | FILE *f;
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[25147] | 226 | mg_u_long i;
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[3365] | 227 | f = open_file (filename, TEXT_STATS_DICT_SUFFIX, "rb",
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| 228 | MAGIC_STATS_DICT, MG_ABORT); /* [RPAP - Feb 97: WIN32 Port] */
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| 229 |
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| 230 | fread (&csh, sizeof (csh), 1, f);
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| 231 |
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| 232 | /* [RPAP - Jan 97: Endian Ordering] */
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| 233 | NTOHUL(csh.num_docs);
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| 234 | NTOHD(csh.num_bytes);
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| 235 |
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[8692] | 236 | for (i = 0; i < 2; ++i)
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[3365] | 237 | {
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| 238 | frags_stats_header fsh;
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| 239 | char *buf;
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| 240 | DictWordData *wd;
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| 241 | chars[i] = 0;
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| 242 |
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| 243 | fread (&fsh, sizeof (fsh), 1, f);
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| 244 | /* [RPAP - Jan 97: Endian Ordering] */
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| 245 | NTOHUL(fsh.num_frags);
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| 246 | NTOHUL(fsh.mem_for_frags);
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| 247 |
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| 248 | Num[i] = all[i].num_wds = fsh.num_frags;
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| 249 |
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| 250 | /* The +1 on the following line is to leave room for the esc code. */
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| 251 | all[i].wd = (DictWordData **) Xmalloc (sizeof (DictWordData *) * Num[i] + 1);
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| 252 |
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| 253 | buf = (char *) Xmalloc (fsh.mem_for_frags);
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| 254 | wd = Words[i] = (DictWordData *) Xmalloc (sizeof (DictWordData) * Num[i]);
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| 255 | unsigned int j;
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[8692] | 256 | for (j = 0; j < Num[i]; ++j, ++wd)
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[3365] | 257 | {
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| 258 | int len;
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| 259 |
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| 260 | // read docCount and wordCount
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| 261 | wd->read(f);
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| 262 |
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| 263 | // read an mgString
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| 264 | len = fgetc (f);
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| 265 | wd->word = (u_char *) buf;
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| 266 | *buf++ = len;
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| 267 | fread (buf, len, 1, f);
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| 268 | buf += len;
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| 269 | all[i].wd[j] = wd;
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| 270 | }
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| 271 | chars[i] = fsh.mem_for_frags - fsh.num_frags;
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| 272 | }
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| 273 | fclose (f);
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| 274 | }
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| 275 |
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| 276 |
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| 277 | static void
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| 278 | Alloc_keep_discard (void)
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| 279 | {
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| 280 | keep[0].num_wds = 0;
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| 281 | keep[0].wd = (DictWordData **) Xmalloc ((Num[0] + 1) * sizeof (DictWordData *));
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| 282 | keep[1].num_wds = 0;
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| 283 | keep[1].wd = (DictWordData **) Xmalloc ((Num[1] + 1) * sizeof (DictWordData *));
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| 284 | discard[0].num_wds = 0;
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| 285 | discard[0].wd = (DictWordData **) Xmalloc ((Num[0] + 1) * sizeof (DictWordData *));
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| 286 | discard[1].num_wds = 0;
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| 287 | discard[1].wd = (DictWordData **) Xmalloc ((Num[1] + 1) * sizeof (DictWordData *));
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| 288 | }
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| 289 |
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| 290 |
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| 291 | static int
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| 292 | sort_comp (const void *a, const void *b)
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| 293 | {
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| 294 | DictWordData *aa = *(DictWordData **) a;
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| 295 | DictWordData *bb = *(DictWordData **) b;
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| 296 | return casecompare (aa->word, bb->word); /* [RPAP - Jan 97: Stem Index Change] */
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| 297 | }
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| 298 |
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| 299 |
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| 300 |
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| 301 | static void
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| 302 | SortAndCount_DictData (DictData * dd)
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| 303 | {
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| 304 | unsigned int i;
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| 305 | DictWordData **wd;
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| 306 | qsort (dd->wd, dd->num_wds, sizeof (DictWordData *), sort_comp);
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| 307 | dd->chars = 0;
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| 308 | wd = dd->wd;
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[8692] | 309 | for (i = 0; i < dd->num_wds; ++i, ++wd)
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[3365] | 310 | dd->chars += (*wd)->word[0];
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| 311 | }
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| 312 |
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| 313 |
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| 314 | static void
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| 315 | Select_all (void)
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| 316 | {
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| 317 | unsigned int i;
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| 318 | Alloc_keep_discard ();
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| 319 | keep[0].num_wds = Num[0];
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[8692] | 320 | for (i = 0; i < Num[0]; ++i)
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[3365] | 321 | keep[0].wd[i] = Words[0] + i;
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| 322 | keep[1].num_wds = Num[1];
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[8692] | 323 | for (i = 0; i < Num[1]; ++i)
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[3365] | 324 | keep[1].wd[i] = Words[1] + i;
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| 325 | SortAndCount_DictData (&keep[0]);
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| 326 | SortAndCount_DictData (&keep[1]);
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| 327 | }
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| 328 |
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| 329 |
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| 330 |
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| 331 |
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| 332 | static int
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| 333 | DecFreqIncWL (void *a, void *b)
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| 334 | {
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| 335 | DictWordData *aa = *(DictWordData **) a;
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| 336 | DictWordData *bb = *(DictWordData **) b;
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| 337 | if (aa->docCount > bb->docCount)
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| 338 | return -1;
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| 339 | else if (aa->docCount < bb->docCount)
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| 340 | return 1;
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| 341 | else
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| 342 | return bb->word[0] - aa->word[0];
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| 343 | }
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| 344 |
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| 345 |
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| 346 | static int
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| 347 | OccuranceOrder (void *a, void *b)
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| 348 | {
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| 349 | DictWordData *aa = *(DictWordData **) a;
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| 350 | DictWordData *bb = *(DictWordData **) b;
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| 351 | if (aa->words() > bb->words())
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| 352 | return 1;
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| 353 | else if (aa->words() < bb->words())
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| 354 | return -1;
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| 355 | else
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| 356 | return 0;
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| 357 | }
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| 358 |
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| 359 |
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| 360 | static void
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| 361 | Select_on (int k, heap_comp hc)
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| 362 | {
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| 363 | int i, num, mem;
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| 364 | DictWordData **wd;
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| 365 |
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| 366 | Alloc_keep_discard ();
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| 367 |
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| 368 | num = Num[0] + Num[1];
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| 369 | wd = (DictWordData **) Xmalloc (num * sizeof (DictWordData *));
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[8692] | 370 | for (i = 0; (unsigned int)i < Num[0]; ++i)
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[3365] | 371 | wd[i] = Words[0] + i;
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[8692] | 372 | for (i = 0; (unsigned int)i < Num[1]; ++i)
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[3365] | 373 | wd[i + Num[0]] = Words[1] + i;
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| 374 |
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| 375 | heap_build (wd, sizeof (*wd), num, hc);
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| 376 |
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| 377 | mem = 0;
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| 378 | while (k > mem && num)
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| 379 | {
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| 380 | int idx;
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| 381 | DictWordData *word = wd[0];
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| 382 | #ifdef DEBUG
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| 383 | fprintf (stderr, "%4d:%4d:%8d :%8d :%8d : \"%s\"\n",
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| 384 | keep[0].num_wds, keep[1].num_wds,
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| 385 | mem, word->documents(), word->word, word2str (word->word));
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| 386 | #endif
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| 387 | mem += sizeof (u_char *) + word->word[0];
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| 388 | heap_deletehead (wd, sizeof (*wd), &num, hc);
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| 389 | idx = KIND (word);
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| 390 | keep[idx].wd[keep[idx].num_wds++] = word;
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| 391 | }
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| 392 |
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[8692] | 393 | for (i = 0; i < num; ++i)
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[3365] | 394 | {
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| 395 | DictWordData *word = wd[i];
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| 396 | int idx = KIND (word);
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| 397 | discard[idx].wd[discard[idx].num_wds++] = word;
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| 398 | }
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| 399 | SortAndCount_DictData (&keep[0]);
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| 400 | SortAndCount_DictData (&keep[1]);
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| 401 | SortAndCount_DictData (&discard[0]);
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| 402 | SortAndCount_DictData (&discard[1]);
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| 403 |
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| 404 | assert (keep[0].num_wds + discard[0].num_wds == Num[0]);
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| 405 | assert (keep[1].num_wds + discard[1].num_wds == Num[1]);
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| 406 |
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| 407 | }
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| 408 |
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| 409 |
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| 410 |
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| 411 | static int
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| 412 | BigSaving (void *a, void *b)
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| 413 | {
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| 414 | DictWordData *aa = *(DictWordData **) a;
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| 415 | DictWordData *bb = *(DictWordData **) b;
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| 416 | return (aa->saving > bb->saving) ? -1 : (aa->saving < bb->saving);
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| 417 | }
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| 418 |
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| 419 | static int
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| 420 | SmallSaving (void *a, void *b)
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| 421 | {
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| 422 | DictWordData *aa = *(DictWordData **) a;
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| 423 | DictWordData *bb = *(DictWordData **) b;
|
---|
| 424 | return (aa->saving < bb->saving) ? -1 : (aa->saving > bb->saving);
|
---|
| 425 | }
|
---|
| 426 |
|
---|
| 427 |
|
---|
| 428 | static void
|
---|
| 429 | CalcCharCounts (DictWordData ** wd, int num,
|
---|
| 430 | char *char_lens[2], char *len_lens[2],
|
---|
[25147] | 431 | mg_u_long escape[2])
|
---|
[3365] | 432 | {
|
---|
[25147] | 433 | mg_s_long char_freqs[2][256];
|
---|
| 434 | mg_s_long len_freqs[2][16];
|
---|
[3365] | 435 | huff_data hd;
|
---|
| 436 | int i;
|
---|
| 437 | escape[0] = 0;
|
---|
| 438 | escape[1] = 0;
|
---|
| 439 | memset (char_freqs, '\0', sizeof (char_freqs));
|
---|
| 440 | memset (len_freqs, '\0', sizeof (len_freqs));
|
---|
[8692] | 441 | for (i = 0; i < num; ++i, ++wd)
|
---|
[3365] | 442 | {
|
---|
[25147] | 443 | mg_u_long freq = (*wd)->documents();
|
---|
[3365] | 444 | u_char *buf = (*wd)->word;
|
---|
| 445 | int len = *buf++;
|
---|
| 446 | int idx = KIND (*wd);
|
---|
| 447 | len_freqs[idx][len] += freq;
|
---|
| 448 | escape[idx] += freq;
|
---|
[8692] | 449 | for (; len; --len, ++buf)
|
---|
[25147] | 450 | char_freqs[idx][(mg_u_long) (*buf)] += freq;
|
---|
[3365] | 451 | }
|
---|
| 452 | Generate_Huffman_Data (256, char_freqs[0], &hd, NULL);
|
---|
| 453 | char_lens[0] = hd.clens;
|
---|
| 454 | Generate_Huffman_Data (256, char_freqs[1], &hd, NULL);
|
---|
| 455 | char_lens[1] = hd.clens;
|
---|
| 456 |
|
---|
| 457 | Generate_Huffman_Data (16, len_freqs[0], &hd, NULL);
|
---|
| 458 | len_lens[0] = hd.clens;
|
---|
| 459 | Generate_Huffman_Data (16, len_freqs[1], &hd, NULL);
|
---|
| 460 | len_lens[1] = hd.clens;
|
---|
| 461 | }
|
---|
| 462 |
|
---|
| 463 |
|
---|
| 464 |
|
---|
| 465 |
|
---|
| 466 |
|
---|
| 467 | inline void CalcBitCostForWordData(DictWordData **word, int num,
|
---|
[25147] | 468 | double freqs_trans[2], mg_u_long escape[2],
|
---|
[3365] | 469 | char * char_lens[2], char *len_lens[2],
|
---|
| 470 | double esc[2], int num_trans)
|
---|
| 471 | {
|
---|
| 472 | int j;
|
---|
| 473 |
|
---|
[8692] | 474 | for (j = 0; j < num; ++j, ++word)
|
---|
[3365] | 475 | {
|
---|
| 476 | float cbc, wbc;
|
---|
| 477 | u_char *buf = (*word)->word;
|
---|
| 478 | int len = *buf++;
|
---|
[25147] | 479 | mg_u_long freq = (*word)->documents();
|
---|
[3365] | 480 | int idx = KIND (*word);
|
---|
| 481 |
|
---|
| 482 | cbc = len_lens[idx][len];
|
---|
[8692] | 483 | for (; len; --len, ++buf)
|
---|
[25147] | 484 | cbc += char_lens[idx][(mg_u_long) (*buf)];
|
---|
[3365] | 485 |
|
---|
| 486 | (*word)->char_bit_cost = (cbc + esc[idx]) * freq;
|
---|
| 487 |
|
---|
| 488 | wbc = -log2 (freq / (freqs_trans[idx] + escape[idx])) * freq;
|
---|
| 489 |
|
---|
| 490 | (*word)->saving = ((*word)->char_bit_cost - wbc) /
|
---|
| 491 | (sizeof (char *) + (*word)->word[0]);
|
---|
| 492 |
|
---|
| 493 | (*word)->num_trans = num_trans;
|
---|
| 494 | }
|
---|
| 495 | }
|
---|
| 496 |
|
---|
| 497 |
|
---|
| 498 |
|
---|
| 499 | void
|
---|
| 500 | CalcBitCost (DictWordData ** discard_word, int discard_num,
|
---|
| 501 | DictWordData ** keep_word, int keep_num, double freqs_trans[2],
|
---|
[25147] | 502 | mg_u_long escape[2], int num_trans)
|
---|
[3365] | 503 | {
|
---|
| 504 | char *char_lens[2];
|
---|
| 505 | char *len_lens[2];
|
---|
| 506 | double esc[2];
|
---|
| 507 | CalcCharCounts (discard_word, discard_num, char_lens, len_lens, escape);
|
---|
| 508 | esc[0] = -log2 (escape[0] / (freqs_trans[0] + escape[0]));
|
---|
| 509 | esc[1] = -log2 (escape[1] / (freqs_trans[1] + escape[1]));
|
---|
| 510 | CalcBitCostForWordData(discard_word, discard_num, freqs_trans, escape,
|
---|
| 511 | char_lens, len_lens, esc, num_trans);
|
---|
| 512 | CalcBitCostForWordData(keep_word, keep_num, freqs_trans, escape,
|
---|
| 513 | char_lens, len_lens, esc, num_trans);
|
---|
| 514 | Xfree (char_lens[0]);
|
---|
| 515 | Xfree (char_lens[1]);
|
---|
| 516 | Xfree (len_lens[0]);
|
---|
| 517 | Xfree (len_lens[1]);
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 | inline void m3_transferWord(DictWordData **toHeap, int *toNum, heap_comp toSaving,
|
---|
| 521 | DictWordData **fromHeap, int *fromNum, heap_comp fromSaving,
|
---|
| 522 | int *num_trans, double freqs_trans[], int *mem, double *total,
|
---|
| 523 | int *count)
|
---|
| 524 | {
|
---|
| 525 | /* Transfer the word at the top of the keep heap to the
|
---|
| 526 | discard heap. */
|
---|
| 527 | DictWordData *word = fromHeap[0];
|
---|
| 528 | int idx = KIND (word);
|
---|
| 529 | heap_deletehead (fromHeap, sizeof (word), fromNum, fromSaving);
|
---|
| 530 | toHeap[*toNum] = word;
|
---|
| 531 | heap_additem (toHeap, sizeof (word), toNum, toSaving);
|
---|
| 532 | freqs_trans[idx] -= word->documents();
|
---|
| 533 | *mem = (*mem) - sizeof (u_char *) + word->word[0];
|
---|
| 534 | *num_trans += 1;
|
---|
| 535 | *total += word->saving;
|
---|
| 536 | *count += 1;
|
---|
| 537 | #ifdef DEBUG
|
---|
| 538 | fprintf (stderr,
|
---|
| 539 | "KEEP -> DISCARD %8d :%8d :%8.0f :%8.0f : \"%s\"\n",
|
---|
| 540 | *mem, word->documents(), word->char_bit_cost,
|
---|
| 541 | word->saving, word2str (word->word));
|
---|
| 542 | #endif
|
---|
| 543 | }
|
---|
| 544 |
|
---|
| 545 | inline void m3_storeWord(DictWordData **wordHeap, int wordNum, int num_trans,
|
---|
[25147] | 546 | double freqs_trans[], mg_u_long escape[], heap_comp hc)
|
---|
[3365] | 547 | {
|
---|
| 548 | DictWordData *word = wordHeap[0];
|
---|
| 549 | int idx = KIND (word);
|
---|
| 550 | float wbc;
|
---|
| 551 | #ifdef DEBUG1
|
---|
| 552 | fprintf (stderr, "KEEP \"%s\" %.2f ->", word2str (word->word),
|
---|
| 553 | word->saving);
|
---|
| 554 | #endif
|
---|
| 555 | wbc = -log2 (word->documents() / (freqs_trans[idx] + escape[idx])) *
|
---|
| 556 | word->documents();
|
---|
| 557 | word->saving = (word->char_bit_cost - wbc) /
|
---|
| 558 | (sizeof (char *) + word->word[0]);
|
---|
| 559 | #ifdef DEBUG1
|
---|
| 560 | fprintf (stderr, " %.2f\n", word->saving);
|
---|
| 561 | #endif
|
---|
| 562 | word->num_trans = num_trans;
|
---|
| 563 | heap_changedhead (wordHeap, sizeof (word), wordNum, hc);
|
---|
| 564 | }
|
---|
| 565 |
|
---|
| 566 |
|
---|
| 567 | static void
|
---|
| 568 | Method3 (int k)
|
---|
| 569 | {
|
---|
| 570 | int i, keep_num, discard_num, mem, num_trans, recalc_reqd;
|
---|
| 571 | int keep_to_discard = 0;
|
---|
| 572 | int discard_to_keep = 0;
|
---|
| 573 | int recalcs = 0;
|
---|
| 574 | double freqs_trans[2], total;
|
---|
[25147] | 575 | mg_u_long escape[2];
|
---|
[3365] | 576 | DictWordData **keep_heap, **discard_heap;
|
---|
| 577 |
|
---|
| 578 | freqs_trans[0] = freqs_trans[1] = 0;
|
---|
| 579 | num_trans = 0;
|
---|
| 580 |
|
---|
| 581 | discard_num = Num[0] + Num[1];
|
---|
| 582 | discard_heap = (DictWordData **) Xmalloc (discard_num * sizeof (DictWordData *));
|
---|
| 583 |
|
---|
| 584 | keep_num = 0;
|
---|
| 585 | keep_heap = (DictWordData **) Xmalloc (discard_num * sizeof (DictWordData *));
|
---|
| 586 |
|
---|
| 587 |
|
---|
[8692] | 588 | for (i = 0; (unsigned int)i < Num[0]; ++i)
|
---|
[3365] | 589 | discard_heap[i] = Words[0] + i;
|
---|
[8692] | 590 | for (i = 0; (unsigned int)i < Num[1]; ++i)
|
---|
[3365] | 591 | discard_heap[i + Num[0]] = Words[1] + i;
|
---|
| 592 |
|
---|
| 593 | heap_build (discard_heap, sizeof (*discard_heap), discard_num, DecFreqIncWL);
|
---|
| 594 |
|
---|
| 595 | mem = 0;
|
---|
| 596 | while (k > mem && discard_num)
|
---|
| 597 | {
|
---|
| 598 | DictWordData *word = discard_heap[0];
|
---|
| 599 | mem += sizeof (u_char *) + word->word[0];
|
---|
| 600 | heap_deletehead (discard_heap, sizeof (word), &discard_num, DecFreqIncWL);
|
---|
| 601 | keep_heap[keep_num++] = word;
|
---|
| 602 | freqs_trans[KIND (word)] += word->documents();
|
---|
[8692] | 603 | ++num_trans;
|
---|
[3365] | 604 | }
|
---|
| 605 |
|
---|
| 606 | CalcBitCost (discard_heap, discard_num, keep_heap, keep_num,
|
---|
| 607 | freqs_trans, escape, num_trans);
|
---|
| 608 | heap_build (discard_heap, sizeof (*discard_heap), discard_num, BigSaving);
|
---|
| 609 | heap_build (keep_heap, sizeof (*keep_heap), keep_num, SmallSaving);
|
---|
| 610 |
|
---|
| 611 | total = 0;
|
---|
| 612 | recalc_reqd = 0;
|
---|
| 613 | while (keep_num && discard_num)
|
---|
| 614 | {
|
---|
| 615 | if ((keep_num && keep_heap[0]->num_trans < (unsigned)num_trans) ||
|
---|
| 616 | (discard_num && discard_heap[0]->num_trans < (unsigned)num_trans))
|
---|
| 617 | {
|
---|
| 618 | if (keep_num && keep_heap[0]->num_trans < (unsigned)num_trans)
|
---|
| 619 | {
|
---|
| 620 | m3_storeWord(keep_heap, keep_num, num_trans, freqs_trans, escape, SmallSaving);
|
---|
| 621 | }
|
---|
| 622 |
|
---|
| 623 | if (discard_num && discard_heap[0]->num_trans < (unsigned)num_trans)
|
---|
| 624 | {
|
---|
| 625 | m3_storeWord(discard_heap, discard_num, num_trans, freqs_trans, escape, BigSaving);
|
---|
| 626 | }
|
---|
| 627 | }
|
---|
| 628 | else if (keep_heap[0]->saving < discard_heap[0]->saving)
|
---|
| 629 | {
|
---|
| 630 | assert (keep_num && discard_num);
|
---|
| 631 | if (keep_num && mem + sizeof (char *) + discard_heap[0]->word[0] > (unsigned)k)
|
---|
| 632 | {
|
---|
| 633 | /* Transfer the word at the top of the keep heap to the
|
---|
| 634 | discard heap. */
|
---|
| 635 | m3_transferWord(discard_heap, &discard_num, BigSaving,
|
---|
| 636 | keep_heap, &keep_num, SmallSaving,
|
---|
| 637 | &num_trans, freqs_trans, &mem, &total, &keep_to_discard);
|
---|
| 638 | }
|
---|
| 639 | else
|
---|
| 640 | {
|
---|
| 641 | /* Transfer the word at the top of the discard heap to the
|
---|
| 642 | keep heap. */
|
---|
| 643 | m3_transferWord(keep_heap, &keep_num, SmallSaving,
|
---|
| 644 | discard_heap, &discard_num, BigSaving,
|
---|
| 645 | &num_trans, freqs_trans, &mem, &total, &discard_to_keep);
|
---|
| 646 | }
|
---|
| 647 |
|
---|
| 648 | recalc_reqd = 1;
|
---|
| 649 |
|
---|
| 650 | }
|
---|
| 651 | else
|
---|
| 652 | {
|
---|
| 653 | if (recalc_reqd == 0)
|
---|
| 654 | break;
|
---|
| 655 | #ifdef DEBUG1
|
---|
| 656 | fprintf (stderr, "--------------\n");
|
---|
| 657 | #endif
|
---|
| 658 | if (recalcs == MAX_RECALCULATIONS)
|
---|
| 659 | break;
|
---|
| 660 | CalcBitCost (discard_heap, discard_num, keep_heap, keep_num,
|
---|
| 661 | freqs_trans, escape, num_trans);
|
---|
| 662 | heap_build (discard_heap, sizeof (*discard_heap),
|
---|
| 663 | discard_num, BigSaving);
|
---|
| 664 | heap_build (keep_heap, sizeof (keep_heap), keep_num, SmallSaving);
|
---|
| 665 | recalc_reqd = 0;
|
---|
[8692] | 666 | ++recalcs;
|
---|
[3365] | 667 | }
|
---|
| 668 | }
|
---|
| 669 |
|
---|
| 670 | Alloc_keep_discard ();
|
---|
| 671 |
|
---|
[8692] | 672 | for (i = 0; i < discard_num; ++i)
|
---|
[3365] | 673 | {
|
---|
| 674 | DictWordData *word = discard_heap[i];
|
---|
| 675 | int idx = KIND (word);
|
---|
| 676 | assert (IsWord (word) || IsNonWord (word));
|
---|
| 677 | discard[idx].wd[discard[idx].num_wds++] = word;
|
---|
| 678 | }
|
---|
[8692] | 679 | for (i = 0; i < keep_num; ++i)
|
---|
[3365] | 680 | {
|
---|
| 681 | DictWordData *word = keep_heap[i];
|
---|
| 682 | int idx = KIND (word);
|
---|
| 683 | assert (IsWord (word) || IsNonWord (word));
|
---|
| 684 | keep[idx].wd[keep[idx].num_wds++] = word;
|
---|
| 685 | }
|
---|
| 686 | SortAndCount_DictData (&keep[0]);
|
---|
| 687 | SortAndCount_DictData (&keep[1]);
|
---|
| 688 | SortAndCount_DictData (&discard[0]);
|
---|
| 689 | SortAndCount_DictData (&discard[1]);
|
---|
| 690 |
|
---|
| 691 | assert (keep[0].num_wds + discard[0].num_wds == Num[0]);
|
---|
| 692 | assert (keep[1].num_wds + discard[1].num_wds == Num[1]);
|
---|
| 693 | #ifndef SILENT
|
---|
| 694 | Message ("Keep -> Discard : %8d", keep_to_discard);
|
---|
| 695 | Message ("Discard -> Keep : %8d", discard_to_keep);
|
---|
| 696 | Message ("Huffman Recalculations : %8d", recalcs);
|
---|
| 697 | if (recalcs == MAX_RECALCULATIONS)
|
---|
| 698 | Message ("WARNING: The number of recalculations == %d", MAX_RECALCULATIONS);
|
---|
| 699 | #endif
|
---|
| 700 | }
|
---|
| 701 |
|
---|
| 702 |
|
---|
| 703 |
|
---|
| 704 |
|
---|
| 705 |
|
---|
| 706 |
|
---|
| 707 |
|
---|
| 708 |
|
---|
| 709 |
|
---|
| 710 |
|
---|
| 711 | /****************************************************************************
|
---|
| 712 | ***** *****
|
---|
| 713 | ***** Dictionary saving code *****
|
---|
| 714 | ***** *****
|
---|
| 715 | ****************************************************************************/
|
---|
| 716 |
|
---|
| 717 |
|
---|
| 718 |
|
---|
| 719 | static void
|
---|
| 720 | Write_cdh (FILE * f, compression_dict_header * cdh)
|
---|
| 721 | {
|
---|
| 722 | /* [RPAP - Jan 97: Endian Ordering] */
|
---|
| 723 | int i;
|
---|
| 724 | compression_dict_header tmp = *cdh;
|
---|
| 725 | HTONUL(tmp.dict_type);
|
---|
| 726 | HTONUL(tmp.novel_method);
|
---|
[8692] | 727 | for (i = 0; i < TEXT_PARAMS; ++i)
|
---|
[3365] | 728 | HTONUL(tmp.params[i]);
|
---|
| 729 | HTONUL(tmp.num_words[0]);
|
---|
| 730 | HTONUL(tmp.num_words[1]);
|
---|
| 731 | HTONUL(tmp.num_word_chars[0]);
|
---|
| 732 | HTONUL(tmp.num_word_chars[1]);
|
---|
| 733 | HTONUL(tmp.lookback);
|
---|
| 734 |
|
---|
| 735 | fwrite (&tmp, sizeof (tmp), 1, f);
|
---|
| 736 | }
|
---|
| 737 |
|
---|
| 738 |
|
---|
| 739 | static void
|
---|
| 740 | Write_words (FILE * f, DictData * dd)
|
---|
| 741 | {
|
---|
| 742 | unsigned int i;
|
---|
| 743 | u_char *curr, *prev = NULL;
|
---|
[8692] | 744 | for (i = 0; i < dd->num_wds; ++i)
|
---|
[3365] | 745 | {
|
---|
| 746 | int len;
|
---|
| 747 | curr = dd->wd[i]->word;
|
---|
| 748 | if (prev)
|
---|
| 749 | /* look for prefix match with prev string */
|
---|
| 750 | len = prefixlen (prev, curr);
|
---|
| 751 | else
|
---|
| 752 | len = 0;
|
---|
| 753 | fputc ((len << 4) + (curr[0] - len), f);
|
---|
| 754 | fwrite (curr + len + 1, sizeof (u_char), curr[0] - len, f);
|
---|
| 755 | prev = curr;
|
---|
| 756 | }
|
---|
| 757 |
|
---|
| 758 | }
|
---|
| 759 |
|
---|
| 760 |
|
---|
| 761 | static int
|
---|
| 762 | Uncompressed_size (DictData * dd)
|
---|
| 763 | {
|
---|
| 764 | unsigned int i, us;
|
---|
[8692] | 765 | for (us = i = 0; i < dd->num_wds; ++i)
|
---|
[3365] | 766 | us += dd->wd[i]->word[0];
|
---|
| 767 | return us;
|
---|
| 768 | }
|
---|
| 769 |
|
---|
| 770 |
|
---|
[25147] | 771 | static mg_u_long
|
---|
[3365] | 772 | Write_data (FILE * f, DictData * dd, int lookback)
|
---|
| 773 | {
|
---|
[25147] | 774 | mg_u_long mem_reqd;
|
---|
[3365] | 775 | huff_data *hd;
|
---|
| 776 | int i;
|
---|
[25147] | 777 | mg_u_long us = dd->num_wds;
|
---|
| 778 | mg_s_long *freqs;
|
---|
| 779 | mg_u_long huff_words_size[MAX_HUFFCODE_LEN + 1];
|
---|
| 780 | mg_u_long lencounts[MAX_HUFFCODE_LEN + 1];
|
---|
[3365] | 781 | u_char *lastword[MAX_HUFFCODE_LEN + 1];
|
---|
| 782 |
|
---|
[25147] | 783 | if (!(freqs = new mg_s_long [dd->num_wds]))
|
---|
[3365] | 784 | FatalError (1, "Unable to allocate memory for freqs");
|
---|
| 785 |
|
---|
[8692] | 786 | for (i = 0; (unsigned)i < dd->num_wds; ++i)
|
---|
[3365] | 787 | {
|
---|
| 788 | freqs[i] = dd->wd[i]->documents();
|
---|
| 789 | us += dd->wd[i]->word[0];
|
---|
| 790 | }
|
---|
| 791 |
|
---|
| 792 | if (!(hd = Generate_Huffman_Data (dd->num_wds, freqs, NULL, NULL)))
|
---|
| 793 | FatalError (1, "Unable to allocate memory for huffman data");
|
---|
| 794 |
|
---|
[8692] | 795 | delete []freqs;
|
---|
[3365] | 796 | freqs = NULL;
|
---|
| 797 |
|
---|
| 798 | if (Write_Huffman_Data (f, hd) == -1)
|
---|
| 799 | FatalError (1, "Unable to write huffman data");
|
---|
| 800 |
|
---|
| 801 | HTONUL(us); /* [RPAP - Jan 97: Endian Ordering] */
|
---|
| 802 | fwrite (&us, sizeof (us), 1, f);
|
---|
| 803 | NTOHUL(us); /* [RPAP - Jan 97: Endian Ordering] */
|
---|
| 804 |
|
---|
| 805 |
|
---|
| 806 | /* Calculate the amount of memory that will be required to store the text for
|
---|
| 807 | each different huffman code len. Every 1<<lookback words for each different
|
---|
| 808 | codelen length will not be prefixed by previous strings. */
|
---|
| 809 |
|
---|
| 810 |
|
---|
| 811 | memset (&huff_words_size, '\0', sizeof (huff_words_size));
|
---|
| 812 | memset (&lencounts, '\0', sizeof (lencounts));
|
---|
| 813 |
|
---|
| 814 | mem_reqd = 0;
|
---|
| 815 |
|
---|
[8692] | 816 | for (i = 0; (unsigned)i < dd->num_wds; ++i)
|
---|
[3365] | 817 | {
|
---|
| 818 | int codelen = hd->clens[i];
|
---|
| 819 | u_char *word = dd->wd[i]->word;
|
---|
| 820 |
|
---|
| 821 | if (!codelen)
|
---|
| 822 | FatalError (1, "The length of a code for a word was zero");
|
---|
| 823 |
|
---|
| 824 | huff_words_size[codelen] += word[0] + 1;
|
---|
| 825 | mem_reqd += word[0] + (lookback != 0);
|
---|
| 826 | #if 0
|
---|
| 827 | if ((lencounts[codelen] & ((1 << lookback) - 1)) == 0)
|
---|
| 828 | lastword[codelen] = word;
|
---|
| 829 | else
|
---|
| 830 | huff_words_size[codelen] -= prefixlen (lastword[codelen], word);
|
---|
| 831 | #else
|
---|
| 832 | if ((lencounts[codelen] & ((1 << lookback) - 1)) != 0)
|
---|
| 833 | {
|
---|
| 834 | int save = prefixlen (lastword[codelen], word);
|
---|
| 835 | mem_reqd -= save;
|
---|
| 836 | huff_words_size[codelen] -= save;
|
---|
| 837 | }
|
---|
| 838 | else
|
---|
| 839 | {
|
---|
| 840 | mem_reqd += sizeof (u_char *);
|
---|
| 841 | }
|
---|
| 842 | lastword[codelen] = word;
|
---|
| 843 | #endif
|
---|
[8692] | 844 | ++lencounts[codelen];
|
---|
[3365] | 845 | }
|
---|
| 846 |
|
---|
| 847 | /* [RPAP - Jan 97: Endian Ordering] */
|
---|
[8692] | 848 | for (i = hd->mincodelen; i < hd->maxcodelen + 1; ++i)
|
---|
[3365] | 849 | HTONUL(huff_words_size[i]);
|
---|
| 850 |
|
---|
| 851 | fwrite (huff_words_size + hd->mincodelen, sizeof (*huff_words_size),
|
---|
| 852 | hd->maxcodelen - hd->mincodelen + 1, f);
|
---|
| 853 |
|
---|
| 854 | /* [RPAP - Jan 97: Endian Ordering] */
|
---|
[8692] | 855 | for (i = hd->mincodelen; i < hd->maxcodelen + 1; ++i)
|
---|
[3365] | 856 | NTOHUL(huff_words_size[i]);
|
---|
| 857 |
|
---|
| 858 | Write_words (f, dd);
|
---|
| 859 |
|
---|
[8692] | 860 | delete []hd->clens;
|
---|
[3365] | 861 | delete hd;
|
---|
| 862 |
|
---|
| 863 | return mem_reqd;
|
---|
| 864 | }
|
---|
| 865 |
|
---|
| 866 |
|
---|
| 867 |
|
---|
| 868 | static void
|
---|
| 869 | Write_charfreqs (FILE * f, DictData * dd, int words,
|
---|
| 870 | int zero_freq_permitted)
|
---|
| 871 | {
|
---|
| 872 | unsigned int j;
|
---|
[25147] | 873 | mg_s_long freqs[256];
|
---|
[3365] | 874 | DictWordData **wd = dd->wd;
|
---|
| 875 | huff_data *hd;
|
---|
| 876 |
|
---|
| 877 | memset (freqs, '\0', sizeof (freqs));
|
---|
| 878 |
|
---|
[8692] | 879 | for (j = 0; j < dd->num_wds; ++j, ++wd)
|
---|
[3365] | 880 | {
|
---|
| 881 | u_char *buf = (*wd)->word;
|
---|
| 882 | int len = *buf++;
|
---|
[8692] | 883 | for (; len; --len, ++buf)
|
---|
[25147] | 884 | freqs[(mg_u_long) (*buf)] += (*wd)->documents();
|
---|
[3365] | 885 | }
|
---|
| 886 |
|
---|
| 887 | if (!zero_freq_permitted)
|
---|
[8692] | 888 | for (j = 0; j < 256; ++j)
|
---|
[3365] | 889 | if (!freqs[j] && PESINAWORD (j) == words)
|
---|
| 890 | freqs[j] = 1;
|
---|
| 891 |
|
---|
| 892 | if (!(hd = Generate_Huffman_Data (256, freqs, NULL, NULL)))
|
---|
| 893 | FatalError (1, "Unable to allocate memory for huffman data");
|
---|
| 894 |
|
---|
| 895 | if (Write_Huffman_Data (f, hd) == -1)
|
---|
| 896 | FatalError (1, "Unable to write huffman data");
|
---|
| 897 |
|
---|
[8692] | 898 | delete []hd->clens;
|
---|
[3365] | 899 | delete hd;
|
---|
| 900 | }
|
---|
| 901 |
|
---|
| 902 |
|
---|
| 903 |
|
---|
| 904 |
|
---|
| 905 | static void
|
---|
| 906 | Write_wordlens (FILE * f, DictData * dd, int zero_freq_permitted)
|
---|
| 907 | {
|
---|
| 908 | unsigned int j;
|
---|
[25147] | 909 | mg_s_long freqs[16];
|
---|
[3365] | 910 | DictWordData **wd = dd->wd;
|
---|
| 911 | huff_data *hd;
|
---|
| 912 |
|
---|
| 913 | memset (freqs, '\0', sizeof (freqs));
|
---|
| 914 |
|
---|
[8692] | 915 | for (j = 0; j < dd->num_wds; ++j, ++wd)
|
---|
[3365] | 916 | freqs[(*wd)->word[0]] += (*wd)->documents();
|
---|
| 917 |
|
---|
| 918 | if (!zero_freq_permitted)
|
---|
[8692] | 919 | for (j = 0; j < 16; ++j)
|
---|
[3365] | 920 | if (!freqs[j])
|
---|
| 921 | freqs[j] = 1;
|
---|
| 922 |
|
---|
| 923 | if (!(hd = Generate_Huffman_Data (16, freqs, NULL, NULL)))
|
---|
| 924 | FatalError (1, "Unable to allocate memory for huffman data");
|
---|
| 925 |
|
---|
| 926 | if (Write_Huffman_Data (f, hd) == -1)
|
---|
| 927 | FatalError (1, "Unable to write huffman data");
|
---|
| 928 |
|
---|
| 929 |
|
---|
[8692] | 930 | delete []hd->clens;
|
---|
[3365] | 931 | delete hd;
|
---|
| 932 | }
|
---|
| 933 |
|
---|
| 934 |
|
---|
| 935 |
|
---|
[25147] | 936 | static mg_u_long
|
---|
| 937 | WriteOutWords (char *file_name, mg_u_long type, int lookback)
|
---|
[3365] | 938 | {
|
---|
| 939 | FILE *f;
|
---|
| 940 | int i;
|
---|
[25147] | 941 | mg_u_long mem_reqd = 0;
|
---|
[3365] | 942 |
|
---|
| 943 | compression_dict_header cdh;
|
---|
| 944 | f = create_file (file_name, TEXT_DICT_SUFFIX, "w+b",
|
---|
| 945 | MAGIC_DICT, MG_ABORT); /* [RPAP - Feb 97: WIN32 Port] */
|
---|
| 946 |
|
---|
| 947 | memset (&cdh, '\0', sizeof(cdh));
|
---|
| 948 |
|
---|
| 949 | cdh.dict_type = type;
|
---|
| 950 | cdh.novel_method = (type == MG_SEED_DICTIONARY) ? novel_method :
|
---|
| 951 | MG_NOVEL_HUFFMAN_CHARS;
|
---|
| 952 |
|
---|
| 953 | cdh.num_words[1] = keep[1].num_wds;
|
---|
| 954 | cdh.num_words[0] = keep[0].num_wds;
|
---|
| 955 | cdh.num_word_chars[1] = Uncompressed_size (&keep[1]);
|
---|
| 956 | cdh.num_word_chars[0] = Uncompressed_size (&keep[0]);
|
---|
| 957 | cdh.lookback = lookback;
|
---|
| 958 |
|
---|
| 959 | Write_cdh (f, &cdh);
|
---|
| 960 |
|
---|
[8692] | 961 | for (i = 0; i < 2; ++i)
|
---|
[3365] | 962 | switch (type)
|
---|
| 963 | {
|
---|
| 964 | case MG_COMPLETE_DICTIONARY:
|
---|
| 965 | {
|
---|
| 966 | mem_reqd += Write_data (f, &keep[i], lookback);
|
---|
| 967 | }
|
---|
| 968 | break;
|
---|
| 969 | case MG_PARTIAL_DICTIONARY:
|
---|
| 970 | {
|
---|
| 971 | if (keep[i].num_wds)
|
---|
| 972 | {
|
---|
| 973 | int j;
|
---|
| 974 | DictWordData esc;
|
---|
| 975 | esc.docCount = 0;
|
---|
| 976 | esc.word = (u_char *) "";
|
---|
| 977 | keep[i].wd[keep[i].num_wds++] = &esc;
|
---|
[8692] | 978 | for (j = 0; (unsigned)j < discard[i].num_wds; ++j)
|
---|
[3365] | 979 | esc.docCount += discard[i].wd[j]->documents();
|
---|
| 980 | if (!esc.docCount)
|
---|
[8692] | 981 | ++esc.docCount;
|
---|
[3365] | 982 | mem_reqd += Write_data (f, &keep[i], lookback);
|
---|
| 983 | }
|
---|
| 984 | Write_charfreqs (f, &discard[i], i, 1);
|
---|
| 985 | Write_wordlens (f, &discard[i], 1);
|
---|
| 986 | }
|
---|
| 987 | break;
|
---|
| 988 | case MG_SEED_DICTIONARY:
|
---|
| 989 | {
|
---|
| 990 | if (keep[i].num_wds)
|
---|
| 991 | {
|
---|
| 992 | int j;
|
---|
| 993 | DictWordData esc;
|
---|
| 994 | esc.docCount = 0;
|
---|
| 995 | esc.word = (u_char *) "";
|
---|
| 996 | keep[i].wd[keep[i].num_wds++] = &esc;
|
---|
[8692] | 997 | for (j = 0; (unsigned)j < all[i].num_wds; ++j)
|
---|
[3365] | 998 | if (all[i].wd[j]->documents() == 1)
|
---|
[8692] | 999 | ++esc.docCount;
|
---|
[3365] | 1000 | if (!esc.docCount)
|
---|
[8692] | 1001 | ++esc.docCount;
|
---|
[3365] | 1002 | mem_reqd += Write_data (f, &keep[i], lookback);
|
---|
| 1003 | }
|
---|
| 1004 | switch (novel_method)
|
---|
| 1005 | {
|
---|
| 1006 | case MG_NOVEL_HUFFMAN_CHARS:
|
---|
| 1007 | Write_charfreqs (f, &all[i], i, 0);
|
---|
| 1008 | Write_wordlens (f, &all[i], 0);
|
---|
| 1009 | break;
|
---|
| 1010 | case MG_NOVEL_DELTA:
|
---|
| 1011 | break;
|
---|
| 1012 | case MG_NOVEL_HYBRID:
|
---|
| 1013 | break;
|
---|
| 1014 | default:
|
---|
| 1015 | FatalError (1, "Bad novel method");
|
---|
| 1016 | }
|
---|
| 1017 | }
|
---|
| 1018 | break;
|
---|
| 1019 | }
|
---|
| 1020 | fclose (f);
|
---|
| 1021 | return mem_reqd;
|
---|
| 1022 | }
|
---|