2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.10 1995-09-28 09:19:41 adam
8 * xfree/xmalloc used everywhere.
9 * Extract/retrieve method seems to work for text records.
11 * Revision 1.9 1995/09/27 12:22:28 adam
12 * More work on extract in record control.
13 * Field name is not in isam keys but in prefix in dictionary words.
15 * Revision 1.8 1995/09/14 07:48:22 adam
16 * Record control management.
18 * Revision 1.7 1995/09/11 13:09:32 adam
19 * More work on relevance feedback.
21 * Revision 1.6 1995/09/08 14:52:27 adam
22 * Minor changes. Dictionary is lower case now.
24 * Revision 1.5 1995/09/06 16:11:16 adam
25 * Option: only one word key per file.
27 * Revision 1.4 1995/09/05 15:28:39 adam
28 * More work on search engine.
30 * Revision 1.3 1995/09/04 12:33:41 adam
31 * Various cleanup. YAZ util used instead.
33 * Revision 1.2 1995/09/04 09:10:34 adam
34 * More work on index add/del/update.
35 * Merge sort implemented.
36 * Initial work on z39 server.
38 * Revision 1.1 1995/09/01 14:06:35 adam
39 * Split of work into more files.
53 static SYSNO sysno_next;
54 static int key_fd = -1;
55 static int sys_idx_fd = -1;
57 static int key_offset, key_buf_size;
61 void key_open (const char *fname)
66 if ((key_fd = open (fname, O_RDWR|O_CREAT, 0666)) == -1)
68 logf (LOG_FATAL|LOG_ERRNO, "open %s", fname);
71 logf (LOG_DEBUG, "key_open of %s", fname);
73 key_buf = xmalloc (key_buf_size);
75 if (!(file_idx = dict_open (FNAME_FILE_DICT, 40, 1)))
77 logf (LOG_FATAL, "dict_open fail of %s", "fileidx");
80 file_key = dict_lookup (file_idx, ".");
82 memcpy (&sysno_next, (char*)file_key+1, sizeof(sysno_next));
85 if ((sys_idx_fd = open (FNAME_SYS_IDX, O_RDWR|O_CREAT, 0666)) == -1)
87 logf (LOG_FATAL|LOG_ERRNO, "open %s", FNAME_SYS_IDX);
96 logf (LOG_DEBUG, "key_close - but no file");
101 dict_insert (file_idx, ".", sizeof(sysno_next), &sysno_next);
102 dict_close (file_idx);
108 void wordFlush (int sysno)
115 while (i < key_offset)
117 w = write (key_fd, key_buf + i, key_offset - i);
120 logf (LOG_FATAL|LOG_ERRNO, "Write key fail");
128 static void wordInit (RecWord *p)
132 p->which = Word_String;
135 static void wordAdd (const RecWord *p)
142 if (key_offset + 1000 > key_buf_size)
147 new_key_buf = xmalloc (2*key_buf_size);
148 memcpy (new_key_buf, key_buf, key_offset);
150 key_buf = new_key_buf;
152 sprintf (wordPrefix, "%c%04d", p->attrSet + '0', p->attrUse);
153 strcpy (key_buf + key_offset, wordPrefix);
154 key_offset += strlen (wordPrefix);
158 for (i = 0; p->u.string[i]; i++)
159 key_buf[key_offset++] = index_char_cvt (p->u.string[i]);
160 key_buf[key_offset++] = '\0';
165 x = (key_cmd == 'a') ? 1 : 0;
166 memcpy (key_buf + key_offset, &x, 1);
169 key.sysno = key_sysno;
170 key.seqno = p->seqno;
171 memcpy (key_buf + key_offset, &key, sizeof(key));
172 key_offset += sizeof(key);
175 void file_extract (int cmd, const char *fname, const char *kname)
181 const char *file_type;
184 struct recExtractCtrl extractCtrl;
187 logf (LOG_DEBUG, "%c %s k=%s", cmd, fname, kname);
188 for (i = strlen(fname); --i >= 0; )
194 else if (fname[i] == '.')
196 strcpy (ext, fname+i+1);
199 sprintf (ext_res, "fileExtension.%s", ext);
200 if (!(file_type = res_get (common_resource, ext_res)))
202 if (!(rt = recType_byName (file_type)))
204 file_info = dict_lookup (file_idx, kname);
207 sysno = sysno_next++;
208 dict_insert (file_idx, kname, sizeof(sysno), &sysno);
209 lseek (sys_idx_fd, sysno * SYS_IDX_ENTRY_LEN, SEEK_SET);
210 write (sys_idx_fd, file_type, strlen (file_type)+1);
211 write (sys_idx_fd, kname, strlen(kname)+1);
214 memcpy (&sysno, (char*) file_info+1, sizeof(sysno));
216 if (!(inf = fopen (fname, "r")))
218 logf (LOG_WARN|LOG_ERRNO, "open %s", fname);
221 extractCtrl.inf = inf;
222 extractCtrl.subType = "";
223 extractCtrl.init = wordInit;
224 extractCtrl.add = wordAdd;
227 (*rt->extract)(&extractCtrl);