1 | /**************************************************************************
|
---|
2 | *
|
---|
3 | * mgpp_stem_idx.cpp -- stem index builder
|
---|
4 | * Copyright (C) 1999 Rodger McNab
|
---|
5 | *
|
---|
6 | * This program is free software; you can redistribute it and/or modify
|
---|
7 | * it under the terms of the GNU General Public License as published by
|
---|
8 | * the Free Software Foundation; either version 2 of the License, or
|
---|
9 | * (at your option) any later version.
|
---|
10 | *
|
---|
11 | * This program is distributed in the hope that it will be useful,
|
---|
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
14 | * GNU General Public License for more details.
|
---|
15 | *
|
---|
16 | * You should have received a copy of the GNU General Public License
|
---|
17 | * along with this program; if not, write to the Free Software
|
---|
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
---|
19 | *
|
---|
20 | **************************************************************************/
|
---|
21 |
|
---|
22 | #define _XOPEN_SOURCE 1
|
---|
23 | // This was added for Solaris, but it makes things worse on Solaris for me...
|
---|
24 | // #define _XOPEN_SOURCE_EXTENDED 1
|
---|
25 |
|
---|
26 | /* getopt is in posix.2, so cygwin should have it in unistd, but doesn't */
|
---|
27 | #if defined (__WIN32__) || defined (__CYGWIN__)
|
---|
28 | # include "getopt_old.h"
|
---|
29 | #else
|
---|
30 | # include <unistd.h>
|
---|
31 | #endif
|
---|
32 |
|
---|
33 | #include "UCArray.h"
|
---|
34 | #include "sysfuncs.h"
|
---|
35 | #include "messages.h"
|
---|
36 | #include "mg_files.h"
|
---|
37 | #include "invf.h"
|
---|
38 | #include "words.h"
|
---|
39 | #include "stemmer.h"
|
---|
40 |
|
---|
41 | #if defined(GSDL_USE_OBJECTSPACE)
|
---|
42 | # include <ospace\std\map>
|
---|
43 | # include <ospace\std\vector>
|
---|
44 | #elif defined(GSDL_USE_STL_H)
|
---|
45 | # include <map.h>
|
---|
46 | # include <vector.h>
|
---|
47 | #else
|
---|
48 | # include <map>
|
---|
49 | # include <vector>
|
---|
50 | #endif
|
---|
51 |
|
---|
52 | typedef vector<mg_u_long> WordNumList;
|
---|
53 | typedef map<UCArray, WordNumList, DictLTUCArray> StemMapDict;
|
---|
54 |
|
---|
55 | void CreateStemDict (char *filename,
|
---|
56 | StemMapDict &stemDict,
|
---|
57 | int stemMethod,
|
---|
58 | int stemmerNum) {
|
---|
59 | stemDict.erase (stemDict.begin(), stemDict.end());
|
---|
60 |
|
---|
61 | // open the dictionary
|
---|
62 | FILE *dictFile = open_file (filename, INVF_DICT_SUFFIX, "rb",
|
---|
63 | MAGIC_STEM_BUILD, MG_ABORT);
|
---|
64 | invf_dict_header idh;
|
---|
65 | idh.Read (dictFile);
|
---|
66 |
|
---|
67 | fseek (dictFile, idh.word_dict_start, SEEK_SET);
|
---|
68 |
|
---|
69 | mg_u_long wordNum;
|
---|
70 | u_char mgWord[MAXSTEMLEN + 1];
|
---|
71 | word_dict_el wordEl;
|
---|
72 | UCArray stemEl;
|
---|
73 | wordEl.SetNumLevels (idh.num_levels);
|
---|
74 | for (wordNum=0; wordNum<idh.word_dict_size; ++wordNum) {
|
---|
75 | // read in the next word
|
---|
76 | wordEl.Read (dictFile, idh.num_levels);
|
---|
77 |
|
---|
78 | // convert the word to an "mg word"
|
---|
79 | mgWord[0] = wordEl.el.size();
|
---|
80 | memcpy((char *)&mgWord[1], &(wordEl.el[0]), wordEl.el.size());
|
---|
81 |
|
---|
82 | // stem the word
|
---|
83 | mgpp_stemmer (stemMethod, stemmerNum, mgWord);
|
---|
84 |
|
---|
85 | // convert the result back to a UCArray
|
---|
86 | stemEl.erase (stemEl.begin(), stemEl.end());
|
---|
87 | stemEl.insert (stemEl.end(), &mgWord[1], &mgWord[1] + mgWord[0]);
|
---|
88 |
|
---|
89 | // cout << "\"" << stemEl << "\" -> \"" << wordEl.el << "\"\n";
|
---|
90 |
|
---|
91 | // add this word number to the list of word numbers for this word
|
---|
92 | stemDict[stemEl].push_back (wordNum);
|
---|
93 | }
|
---|
94 |
|
---|
95 | fclose (dictFile);
|
---|
96 | }
|
---|
97 |
|
---|
98 |
|
---|
99 | void WriteStemDict (char *filename,
|
---|
100 | StemMapDict &stemDict,
|
---|
101 | int stemMethod,
|
---|
102 | int stemmerNum,
|
---|
103 | mg_u_long entriesPerBlock) {
|
---|
104 |
|
---|
105 | /* [JFG - Mar 06: Accent folding patch] */
|
---|
106 | // Create appropriate stem index file
|
---|
107 | FILE *stemDictFile = NULL;
|
---|
108 | if (stemMethod >= STEM_MIN && stemMethod <= STEM_MAX) {
|
---|
109 | char *suffix = make_suffix (INVF_DICT_BLOCKED_SUFFIX_PAT, stemMethod, NULL);
|
---|
110 | stemDictFile = create_file (filename, suffix,
|
---|
111 | "wb", MAGIC_STEM_GEN(stemMethod + '0'), MG_ABORT);
|
---|
112 | }
|
---|
113 | else {
|
---|
114 | FatalError (1, "Unknown stem method %d", stemMethod);
|
---|
115 | }
|
---|
116 |
|
---|
117 | stem_idx_header sih;
|
---|
118 | sih.lookback = 0;
|
---|
119 | sih.dict_size = stemDict.size();
|
---|
120 | sih.entries_per_block = entriesPerBlock;
|
---|
121 | sih.max_block_size = 0;
|
---|
122 |
|
---|
123 | sih.stemmer_num = stemmerNum;
|
---|
124 | sih.stem_method = stemMethod;
|
---|
125 |
|
---|
126 | // write out a place-holder version of the header
|
---|
127 | sih.Write (stemDictFile);
|
---|
128 |
|
---|
129 | sih.blocks_start = ftell (stemDictFile);
|
---|
130 |
|
---|
131 | block_idx stemIdx;
|
---|
132 | mg_u_long stemNum = 0;
|
---|
133 | stem_block_dict_el stemEl;
|
---|
134 | UCArray lastEl;
|
---|
135 |
|
---|
136 | StemMapDict::const_iterator here = stemDict.begin();
|
---|
137 | StemMapDict::const_iterator end = stemDict.end();
|
---|
138 | while (here != end) {
|
---|
139 | // remember this stem (and position) if this is the start
|
---|
140 | // of a new block
|
---|
141 | if (stemNum % entriesPerBlock == 0) {
|
---|
142 | block_idx_info elIdx;
|
---|
143 | elIdx.el = (*here).first;
|
---|
144 | elIdx.block_ptr = ftell (stemDictFile);
|
---|
145 |
|
---|
146 | // see if this block is the longest so far
|
---|
147 | if (stemIdx.size() > 0) {
|
---|
148 | mg_u_long blockLen = elIdx.block_ptr -
|
---|
149 | (*(stemIdx.end()-1)).block_ptr;
|
---|
150 | if (blockLen > sih.max_block_size) sih.max_block_size = blockLen;
|
---|
151 | }
|
---|
152 |
|
---|
153 | stemIdx.push_back (elIdx);
|
---|
154 | lastEl.erase (lastEl.begin(), lastEl.end()); // output full word
|
---|
155 | }
|
---|
156 |
|
---|
157 | // copy the information for this stem
|
---|
158 | stemEl.el = (*here).first;
|
---|
159 | stemEl.equivWords = (*here).second;
|
---|
160 |
|
---|
161 | // write out the stem
|
---|
162 | stemEl.Write (stemDictFile, &lastEl);
|
---|
163 |
|
---|
164 | ++here; ++stemNum;
|
---|
165 | }
|
---|
166 |
|
---|
167 |
|
---|
168 | // write out the element indexes
|
---|
169 | sih.num_blocks = stemIdx.size();
|
---|
170 | sih.block_idx_start = ftell (stemDictFile);
|
---|
171 | WriteBlockIdx (stemDictFile, stemIdx);
|
---|
172 |
|
---|
173 | // write out the stem dictionary header
|
---|
174 | fseek (stemDictFile, sizeof(mg_u_long), SEEK_SET);
|
---|
175 | sih.Write (stemDictFile);
|
---|
176 |
|
---|
177 |
|
---|
178 | // close open files
|
---|
179 | fclose (stemDictFile);
|
---|
180 |
|
---|
181 | // print out information
|
---|
182 | #ifndef SILENT
|
---|
183 | Message ("Num word stems = %d\n", sih.dict_size);
|
---|
184 | Message ("Max stem block size = %d\n", sih.max_block_size);
|
---|
185 | Message ("Number of stem blocks written = %d\n", sih.num_blocks);
|
---|
186 | #endif
|
---|
187 | }
|
---|
188 |
|
---|
189 |
|
---|
190 | int main (int argc, char **argv) {
|
---|
191 | mg_u_long entriesPerBlock = 16;
|
---|
192 | char *filename = (char*)"";
|
---|
193 | int ch;
|
---|
194 | int stemMethod = 0; // illegal value (no translation)
|
---|
195 | int stemmerNum = 0; // English stemmer
|
---|
196 | msg_prefix = argv[0];
|
---|
197 | opterr = 0;
|
---|
198 |
|
---|
199 | while ((ch = getopt (argc, argv, "f:d:b:s:h:a:")) != -1) {
|
---|
200 | switch (ch) {
|
---|
201 | case 'f': // input file
|
---|
202 | filename = optarg;
|
---|
203 | break;
|
---|
204 | case 'd':
|
---|
205 | set_basepath (optarg);
|
---|
206 | break;
|
---|
207 | case 'b':
|
---|
208 | entriesPerBlock = atoi (optarg);
|
---|
209 | break;
|
---|
210 | case 's':
|
---|
211 | stemMethod = atoi (optarg);
|
---|
212 | break;
|
---|
213 | case 'a':
|
---|
214 | stemmerNum = mgpp_stemmernumber ((unsigned char *) optarg);
|
---|
215 | break;
|
---|
216 | case 'h':
|
---|
217 | case '?':
|
---|
218 | fprintf (stderr, "usage: %s [-d directory] "
|
---|
219 | "[-b entries-per-block] [-h] -s 1|2|3", argv[0]);
|
---|
220 | #ifdef ENABLE_ACCENTFOLD
|
---|
221 | fprintf (stderr, "|4|5|6|7");
|
---|
222 | #endif
|
---|
223 | fprintf (stderr, " [-a stemmer-method] -f name\n");
|
---|
224 | exit (1);
|
---|
225 | }
|
---|
226 | }
|
---|
227 |
|
---|
228 | /* [JFG - Mar 06: Accent folding patch] */
|
---|
229 | if (stemMethod < STEM_MIN || stemMethod > STEM_MAX)
|
---|
230 | FatalError (1, "Stem method must be between %d and %d", STEM_MIN, STEM_MAX);
|
---|
231 | #ifndef ENABLE_ACCENTFOLD
|
---|
232 | if (stemMethod & STEM_AccentFolding) {
|
---|
233 | // accent folding not enabled
|
---|
234 | return 2;
|
---|
235 | }
|
---|
236 | #endif
|
---|
237 | // read in the dictionary and create the in memory dictionary
|
---|
238 | StemMapDict stemDict;
|
---|
239 | CreateStemDict (filename, stemDict, stemMethod, stemmerNum);
|
---|
240 |
|
---|
241 | // write out the dictionary as a blocked file
|
---|
242 | WriteStemDict (filename, stemDict, stemMethod, stemmerNum, entriesPerBlock);
|
---|
243 |
|
---|
244 | return 0;
|
---|
245 | }
|
---|