1 /* $Id: rsbool.c,v 1.41 2004-08-24 15:00:16 heikki Exp $
2 Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004
5 This file is part of the Zebra server.
7 Zebra is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with Zebra; see the file LICENSE.zebra. If not, write to the
19 Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
36 static RSFD r_open (RSET ct, int flag);
37 static void r_close (RSFD rfd);
38 static void r_delete (RSET ct);
39 static void r_rewind (RSFD rfd);
40 static int r_forward(RSET ct, RSFD rfd, void *buf,
41 int (*cmpfunc)(const void *p1, const void *p2),
42 const void *untilbuf);
43 static void r_pos (RSFD rfd, double *current, double *total);
44 static int r_read_and (RSFD rfd, void *buf);
45 static int r_read_or (RSFD rfd, void *buf);
46 static int r_read_not (RSFD rfd, void *buf);
47 static int r_write (RSFD rfd, const void *buf);
49 static const struct rset_control control_and =
62 static const struct rset_control control_or =
75 static const struct rset_control control_not =
89 const struct rset_control *rset_kind_and = &control_and;
90 const struct rset_control *rset_kind_or = &control_or;
91 const struct rset_control *rset_kind_not = &control_not;
93 struct rset_bool_info {
97 int (*cmp)(const void *p1, const void *p2);
98 void (*log_item)(int logmask, const void *p, const char *txt);
99 struct rset_bool_rfd *rfd_list;
102 struct rset_bool_rfd {
111 struct rset_bool_rfd *next;
112 struct rset_bool_info *info;
115 static RSET rsbool_create_base( const struct rset_control *ctrl,
116 NMEM nmem, int key_size,
117 int (*cmp)(const void *p1, const void *p2),
118 RSET rset_l, RSET rset_r,
119 void (*log_item)(int logmask, const void *p, const char *txt) )
121 RSET rnew=rset_create_base(ctrl, nmem);
122 struct rset_bool_info *info;
123 info = (struct rset_bool_info *) nmem_malloc(rnew->nmem,sizeof(*info));
124 info->key_size = key_size;
125 info->rset_l = rset_l;
126 info->rset_r = rset_r;
128 info->log_item = log_item;
129 info->rfd_list = NULL;
136 RSET rsbool_create_and( NMEM nmem, int key_size,
137 int (*cmp)(const void *p1, const void *p2),
138 RSET rset_l, RSET rset_r,
139 void (*log_item)(int logmask, const void *p, const char *txt) )
141 return rsbool_create_base(rset_kind_and, nmem, key_size, cmp,
142 rset_l, rset_r, log_item);
145 RSET rsbool_create_or( NMEM nmem, int key_size,
146 int (*cmp)(const void *p1, const void *p2),
147 RSET rset_l, RSET rset_r,
148 void (*log_item)(int logmask, const void *p, const char *txt) )
150 return rsbool_create_base(rset_kind_or, nmem, key_size, cmp,
151 rset_l, rset_r, log_item);
154 RSET rsbool_create_not( NMEM nmem, int key_size,
155 int (*cmp)(const void *p1, const void *p2),
156 RSET rset_l, RSET rset_r,
157 void (*log_item)(int logmask, const void *p, const char *txt) )
159 return rsbool_create_base(rset_kind_not, nmem, key_size, cmp,
160 rset_l, rset_r, log_item);
163 static void r_delete (RSET ct)
165 struct rset_bool_info *info = (struct rset_bool_info *) ct->priv;
167 assert (info->rfd_list == NULL);
168 rset_delete (info->rset_l);
169 rset_delete (info->rset_r);
173 static void *r_create (RSET ct, const struct rset_control *sel, void *parms)
175 rset_bool_parms *bool_parms = (rset_bool_parms *) parms;
176 struct rset_bool_info *info;
178 info = (struct rset_bool_info *) xmalloc (sizeof(*info));
179 info->key_size = bool_parms->key_size;
180 info->rset_l = bool_parms->rset_l;
181 info->rset_r = bool_parms->rset_r;
182 info->cmp = bool_parms->cmp;
183 info->log_item = bool_parms->log_item;
184 info->rfd_list = NULL;
190 static RSFD r_open (RSET ct, int flag)
192 struct rset_bool_info *info = (struct rset_bool_info *) ct->priv;
193 struct rset_bool_rfd *rfd;
195 if (flag & RSETF_WRITE)
197 logf (LOG_FATAL, "bool set type is read-only");
200 rfd = (struct rset_bool_rfd *) nmem_malloc(ct->nmem, sizeof(*rfd));
201 logf(LOG_DEBUG,"rsbool (%s) open [%p]", ct->control->desc, rfd);
202 rfd->next = info->rfd_list;
203 info->rfd_list = rfd;
207 rfd->buf_l = nmem_malloc(ct->nmem, info->key_size);
208 rfd->buf_r = nmem_malloc(ct->nmem, info->key_size);
209 rfd->rfd_l = rset_open (info->rset_l, RSETF_READ);
210 rfd->rfd_r = rset_open (info->rset_r, RSETF_READ);
211 rfd->more_l = rset_read (info->rset_l, rfd->rfd_l, rfd->buf_l);
212 rfd->more_r = rset_read (info->rset_r, rfd->rfd_r, rfd->buf_r);
217 static void r_close (RSFD rfd)
219 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
220 struct rset_bool_rfd **rfdp;
222 for (rfdp = &info->rfd_list; *rfdp; rfdp = &(*rfdp)->next)
225 rset_close (info->rset_l, (*rfdp)->rfd_l);
226 rset_close (info->rset_r, (*rfdp)->rfd_r);
227 *rfdp = (*rfdp)->next;
230 logf (LOG_FATAL, "r_close but no rfd match!");
235 static void r_rewind (RSFD rfd)
237 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
238 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
240 logf (LOG_DEBUG, "rsbool_rewind");
241 rset_rewind (info->rset_l, p->rfd_l);
242 rset_rewind (info->rset_r, p->rfd_r);
243 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
244 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
248 static int r_forward (RSET ct, RSFD rfd, void *buf,
249 int (*cmpfunc)(const void *p1, const void *p2),
250 const void *untilbuf)
252 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
253 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
257 logf (LOG_DEBUG, "rsbool_forward (L) [%p] '%s' (ct=%p rfd=%p m=%d,%d)",
258 rfd, ct->control->desc, ct, rfd, p->more_l, p->more_r);
260 if ( p->more_l && ((cmpfunc)(untilbuf,p->buf_l)==2) )
261 p->more_l = rset_forward(info->rset_l, p->rfd_l, p->buf_l,
262 info->cmp, untilbuf);
264 logf (LOG_DEBUG, "rsbool_forward (R) [%p] '%s' (ct=%p rfd=%p m=%d,%d)",
265 rfd, ct->control->desc, ct, rfd, p->more_l, p->more_r);
267 if ( p->more_r && ((cmpfunc)(untilbuf,p->buf_r)==2))
268 p->more_r = rset_forward(info->rset_r, p->rfd_r, p->buf_r,
269 info->cmp, untilbuf);
271 logf (LOG_DEBUG, "rsbool_forward [%p] calling read, m=%d,%d t=%d",
272 rfd, p->more_l, p->more_r, p->tail);
276 rc = rset_read(ct,rfd,buf);
278 logf (LOG_DEBUG, "rsbool_forward returning [%p] %d m=%d,%d",
279 rfd, rc, p->more_l, p->more_r);
300 static int r_read_and (RSFD rfd, void *buf)
302 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
303 struct rset_bool_info *info = p->info;
305 while (p->more_l || p->more_r)
309 if (p->more_l && p->more_r)
310 cmp = (*info->cmp)(p->buf_l, p->buf_r);
316 logf (LOG_DEBUG, "r_read_and [%p] looping: m=%d/%d c=%d t=%d",
317 rfd, p->more_l, p->more_r, cmp, p->tail);
318 (*info->log_item)(LOG_DEBUG, p->buf_l, "left ");
319 (*info->log_item)(LOG_DEBUG, p->buf_r, "right ");
323 memcpy (buf, p->buf_l, info->key_size);
324 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
329 memcpy (buf, p->buf_r, info->key_size);
330 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
333 logf (LOG_DEBUG, "r_read_and [%p] returning R m=%d/%d c=%d",
334 rfd, p->more_l, p->more_r, cmp);
335 key_logdump(LOG_DEBUG,buf);
336 (*info->log_item)(LOG_DEBUG, buf, "");
343 memcpy (buf, p->buf_l, info->key_size);
344 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
347 logf (LOG_DEBUG, "r_read_and [%p] returning L m=%d/%d c=%d",
348 rfd, p->more_l, p->more_r, cmp);
349 (*info->log_item)(LOG_DEBUG, buf, "");
354 else if (cmp > 1) /* cmp == 2 */
358 memcpy (buf, p->buf_r, info->key_size);
360 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
363 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
366 logf (LOG_DEBUG, "r_read_and returning C m=%d/%d c=%d",
367 p->more_l, p->more_r, cmp);
368 (*info->log_item)(LOG_DEBUG, buf, "");
377 memcpy (buf, p->buf_r, info->key_size);
378 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
379 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
382 logf (LOG_DEBUG, "r_read_and [%p] returning R tail m=%d/%d c=%d",
383 rfd, p->more_l, p->more_r, cmp);
384 (*info->log_item)(LOG_DEBUG, buf, "");
392 logf (LOG_DEBUG, "r_read_and [%p] about to forward R m=%d/%d c=%d",
393 rfd, p->more_l, p->more_r, cmp);
395 if (p->more_r && p->more_l)
396 p->more_r = rset_forward( info->rset_r, p->rfd_r,
397 p->buf_r, (info->cmp), p->buf_l);
399 return 0; /* no point in reading further */
406 memcpy (buf, p->buf_l, info->key_size);
407 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
410 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
413 logf (LOG_DEBUG, "r_read_and [%p] returning R tail m=%d/%d c=%d",
414 rfd, p->more_l, p->more_r, cmp);
415 (*info->log_item)(LOG_DEBUG, buf, "");
423 memcpy (buf, p->buf_l, info->key_size);
424 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
425 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
428 logf (LOG_DEBUG, "r_read_and [%p] returning L tail m=%d/%d c=%d",
429 rfd, p->more_l, p->more_r, cmp);
430 (*info->log_item)(LOG_DEBUG, buf, "");
438 logf (LOG_DEBUG, "r_read_and [%p] about to forward L m=%d/%d c=%d",
439 rfd, p->more_l, p->more_r, cmp);
441 if (p->more_r && p->more_l)
442 p->more_l = rset_forward(
443 info->rset_l, p->rfd_l,
444 p->buf_l, (info->cmp), p->buf_r);
446 return 0; /* no point in reading further */
452 logf (LOG_DEBUG, "r_read_and [%p] reached its end",rfd);
457 static int r_read_or (RSFD rfd, void *buf)
459 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
460 struct rset_bool_info *info = p->info;
462 while (p->more_l || p->more_r)
466 if (p->more_l && p->more_r)
467 cmp = (*info->cmp)(p->buf_l, p->buf_r);
474 memcpy (buf, p->buf_l, info->key_size);
475 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
476 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
478 logf (LOG_DEBUG, "r_read_or returning A m=%d/%d c=%d",
479 p->more_l, p->more_r, cmp);
480 (*info->log_item)(LOG_DEBUG, buf, "");
487 memcpy (buf, p->buf_r, info->key_size);
488 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
490 logf (LOG_DEBUG, "r_read_or returning B m=%d/%d c=%d",
491 p->more_l, p->more_r, cmp);
492 (*info->log_item)(LOG_DEBUG, buf, "");
499 memcpy (buf, p->buf_l, info->key_size);
500 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
502 logf (LOG_DEBUG, "r_read_or returning C m=%d/%d c=%d",
503 p->more_l, p->more_r, cmp);
504 (*info->log_item)(LOG_DEBUG, buf, "");
513 static int r_read_not (RSFD rfd, void *buf)
515 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
516 struct rset_bool_info *info = p->info;
518 while (p->more_l || p->more_r)
522 if (p->more_l && p->more_r)
523 cmp = (*info->cmp)(p->buf_l, p->buf_r);
530 memcpy (buf, p->buf_l, info->key_size);
531 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
537 p->more_r = rset_forward(
538 info->rset_r, p->rfd_r,
539 p->buf_r, (info->cmp), p->buf_l);
543 memcpy (buf, p->buf_l, info->key_size);
546 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
549 cmp = (*info->cmp)(p->buf_l, buf);
550 } while (cmp >= -1 && cmp <= 1);
553 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
556 cmp = (*info->cmp)(p->buf_r, buf);
557 } while (cmp >= -1 && cmp <= 1);
564 static int r_write (RSFD rfd, const void *buf)
566 logf (LOG_FATAL, "bool set type is read-only");
570 static void r_pos (RSFD rfd, double *current, double *total)
572 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
573 struct rset_bool_info *info = p->info;
578 rset_pos(info->rset_l, p->rfd_l, &lcur, <ot);
579 rset_pos(info->rset_r, p->rfd_r, &rcur, &rtot);
580 if ( (rtot<0) && (ltot<0)) { /*no position */
581 *current=rcur; /* return same as you got */
582 *total=rtot; /* probably -1 for not available */
584 if ( rtot<0) { rtot=0; rcur=0;} /* if only one useful, use it */
585 if ( ltot<0) { ltot=0; lcur=0;}
586 if ( rtot+ltot < 1 ) { /* empty rset */
591 r=1.0*(lcur+rcur)/(ltot+rtot); /* weighed average of l and r */
592 *current=(double) (p->hits);
595 yaz_log(LOG_DEBUG,"bool_pos: (%s/%s) %0.1f/%0.1f= %0.4f ",
596 info->rset_l->control->desc, info->rset_r->control->desc,
597 *current, *total, r);