1 /* $Id: rsbool.c,v 1.43 2004-08-25 13:23:13 adam 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; /* RSFDs in use */
100 struct rset_bool_rfd *free_list; /* RSFDs that are freed (for reuse) */
103 struct rset_bool_rfd {
112 struct rset_bool_rfd *next;
113 struct rset_bool_info *info;
116 static RSET rsbool_create_base( const struct rset_control *ctrl,
117 NMEM nmem, int key_size,
118 int (*cmp)(const void *p1, const void *p2),
119 RSET rset_l, RSET rset_r,
120 void (*log_item)(int logmask, const void *p, const char *txt) )
122 RSET rnew=rset_create_base(ctrl, nmem);
123 struct rset_bool_info *info;
124 info = (struct rset_bool_info *) nmem_malloc(rnew->nmem,sizeof(*info));
125 info->key_size = key_size;
126 info->rset_l = rset_l;
127 info->rset_r = rset_r;
129 info->log_item = log_item;
130 info->rfd_list = NULL;
131 info->free_list = NULL;
138 RSET rsbool_create_and( NMEM nmem, int key_size,
139 int (*cmp)(const void *p1, const void *p2),
140 RSET rset_l, RSET rset_r,
141 void (*log_item)(int logmask, const void *p, const char *txt) )
143 return rsbool_create_base(rset_kind_and, nmem, key_size, cmp,
144 rset_l, rset_r, log_item);
147 RSET rsbool_create_or( NMEM nmem, int key_size,
148 int (*cmp)(const void *p1, const void *p2),
149 RSET rset_l, RSET rset_r,
150 void (*log_item)(int logmask, const void *p, const char *txt) )
152 return rsbool_create_base(rset_kind_or, nmem, key_size, cmp,
153 rset_l, rset_r, log_item);
156 RSET rsbool_create_not( NMEM nmem, int key_size,
157 int (*cmp)(const void *p1, const void *p2),
158 RSET rset_l, RSET rset_r,
159 void (*log_item)(int logmask, const void *p, const char *txt) )
161 return rsbool_create_base(rset_kind_not, nmem, key_size, cmp,
162 rset_l, rset_r, log_item);
165 static void r_delete (RSET ct)
167 struct rset_bool_info *info = (struct rset_bool_info *) ct->priv;
169 assert (info->rfd_list == NULL);
170 rset_delete (info->rset_l);
171 rset_delete (info->rset_r);
175 static void *r_create (RSET ct, const struct rset_control *sel, void *parms)
177 rset_bool_parms *bool_parms = (rset_bool_parms *) parms;
178 struct rset_bool_info *info;
180 info = (struct rset_bool_info *) xmalloc (sizeof(*info));
181 info->key_size = bool_parms->key_size;
182 info->rset_l = bool_parms->rset_l;
183 info->rset_r = bool_parms->rset_r;
184 info->cmp = bool_parms->cmp;
185 info->log_item = bool_parms->log_item;
186 info->rfd_list = NULL;
192 static RSFD r_open (RSET ct, int flag)
194 struct rset_bool_info *info = (struct rset_bool_info *) ct->priv;
195 struct rset_bool_rfd *rfd;
197 if (flag & RSETF_WRITE)
199 logf (LOG_FATAL, "bool set type is read-only");
202 rfd = info->free_list;
204 info->free_list = rfd->next;
206 rfd = (struct rset_bool_rfd *) nmem_malloc(ct->nmem, sizeof(*rfd));
208 logf(LOG_DEBUG,"rsbool (%s) open [%p]", ct->control->desc, rfd);
209 rfd->next = info->rfd_list;
210 info->rfd_list = rfd;
214 rfd->buf_l = nmem_malloc(ct->nmem, info->key_size);
215 rfd->buf_r = nmem_malloc(ct->nmem, info->key_size);
216 rfd->rfd_l = rset_open (info->rset_l, RSETF_READ);
217 rfd->rfd_r = rset_open (info->rset_r, RSETF_READ);
218 rfd->more_l = rset_read (info->rset_l, rfd->rfd_l, rfd->buf_l);
219 rfd->more_r = rset_read (info->rset_r, rfd->rfd_r, rfd->buf_r);
224 static void r_close (RSFD rfd)
226 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
227 struct rset_bool_rfd **rfdp;
229 for (rfdp = &info->rfd_list; *rfdp; rfdp = &(*rfdp)->next)
232 struct rset_bool_rfd *rfd_tmp = *rfdp;
234 rset_close (info->rset_l, (*rfdp)->rfd_l);
235 rset_close (info->rset_r, (*rfdp)->rfd_r);
236 *rfdp = (*rfdp)->next;
238 rfd_tmp->next = info->free_list;
239 info->free_list = rfd_tmp;
243 logf (LOG_FATAL, "r_close but no rfd match!");
248 static void r_rewind (RSFD rfd)
250 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
251 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
253 logf (LOG_DEBUG, "rsbool_rewind");
254 rset_rewind (info->rset_l, p->rfd_l);
255 rset_rewind (info->rset_r, p->rfd_r);
256 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
257 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
261 static int r_forward (RSET ct, RSFD rfd, void *buf,
262 int (*cmpfunc)(const void *p1, const void *p2),
263 const void *untilbuf)
265 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
266 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
270 logf (LOG_DEBUG, "rsbool_forward (L) [%p] '%s' (ct=%p rfd=%p m=%d,%d)",
271 rfd, ct->control->desc, ct, rfd, p->more_l, p->more_r);
273 if ( p->more_l && ((cmpfunc)(untilbuf,p->buf_l)==2) )
274 p->more_l = rset_forward(info->rset_l, p->rfd_l, p->buf_l,
275 info->cmp, untilbuf);
277 logf (LOG_DEBUG, "rsbool_forward (R) [%p] '%s' (ct=%p rfd=%p m=%d,%d)",
278 rfd, ct->control->desc, ct, rfd, p->more_l, p->more_r);
280 if ( p->more_r && ((cmpfunc)(untilbuf,p->buf_r)==2))
281 p->more_r = rset_forward(info->rset_r, p->rfd_r, p->buf_r,
282 info->cmp, untilbuf);
284 logf (LOG_DEBUG, "rsbool_forward [%p] calling read, m=%d,%d t=%d",
285 rfd, p->more_l, p->more_r, p->tail);
289 rc = rset_read(ct,rfd,buf);
291 logf (LOG_DEBUG, "rsbool_forward returning [%p] %d m=%d,%d",
292 rfd, rc, p->more_l, p->more_r);
313 static int r_read_and (RSFD rfd, void *buf)
315 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
316 struct rset_bool_info *info = p->info;
318 while (p->more_l || p->more_r)
322 if (p->more_l && p->more_r)
323 cmp = (*info->cmp)(p->buf_l, p->buf_r);
329 logf (LOG_DEBUG, "r_read_and [%p] looping: m=%d/%d c=%d t=%d",
330 rfd, p->more_l, p->more_r, cmp, p->tail);
331 (*info->log_item)(LOG_DEBUG, p->buf_l, "left ");
332 (*info->log_item)(LOG_DEBUG, p->buf_r, "right ");
336 memcpy (buf, p->buf_l, info->key_size);
337 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
342 memcpy (buf, p->buf_r, info->key_size);
343 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
346 logf (LOG_DEBUG, "r_read_and [%p] returning R m=%d/%d c=%d",
347 rfd, p->more_l, p->more_r, cmp);
348 key_logdump(LOG_DEBUG,buf);
349 (*info->log_item)(LOG_DEBUG, buf, "");
356 memcpy (buf, p->buf_l, info->key_size);
357 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
360 logf (LOG_DEBUG, "r_read_and [%p] returning L m=%d/%d c=%d",
361 rfd, p->more_l, p->more_r, cmp);
362 (*info->log_item)(LOG_DEBUG, buf, "");
367 else if (cmp > 1) /* cmp == 2 */
371 memcpy (buf, p->buf_r, info->key_size);
373 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
376 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
379 logf (LOG_DEBUG, "r_read_and returning C m=%d/%d c=%d",
380 p->more_l, p->more_r, cmp);
381 (*info->log_item)(LOG_DEBUG, buf, "");
390 memcpy (buf, p->buf_r, info->key_size);
391 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
392 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
395 logf (LOG_DEBUG, "r_read_and [%p] returning R tail m=%d/%d c=%d",
396 rfd, p->more_l, p->more_r, cmp);
397 (*info->log_item)(LOG_DEBUG, buf, "");
405 logf (LOG_DEBUG, "r_read_and [%p] about to forward R m=%d/%d c=%d",
406 rfd, p->more_l, p->more_r, cmp);
408 if (p->more_r && p->more_l)
409 p->more_r = rset_forward( info->rset_r, p->rfd_r,
410 p->buf_r, (info->cmp), p->buf_l);
412 return 0; /* no point in reading further */
419 memcpy (buf, p->buf_l, info->key_size);
420 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
423 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
426 logf (LOG_DEBUG, "r_read_and [%p] returning R tail m=%d/%d c=%d",
427 rfd, p->more_l, p->more_r, cmp);
428 (*info->log_item)(LOG_DEBUG, buf, "");
436 memcpy (buf, p->buf_l, info->key_size);
437 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
438 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
441 logf (LOG_DEBUG, "r_read_and [%p] returning L tail m=%d/%d c=%d",
442 rfd, p->more_l, p->more_r, cmp);
443 (*info->log_item)(LOG_DEBUG, buf, "");
451 logf (LOG_DEBUG, "r_read_and [%p] about to forward L m=%d/%d c=%d",
452 rfd, p->more_l, p->more_r, cmp);
454 if (p->more_r && p->more_l)
455 p->more_l = rset_forward(
456 info->rset_l, p->rfd_l,
457 p->buf_l, (info->cmp), p->buf_r);
459 return 0; /* no point in reading further */
465 logf (LOG_DEBUG, "r_read_and [%p] reached its end",rfd);
470 static int r_read_or (RSFD rfd, void *buf)
472 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
473 struct rset_bool_info *info = p->info;
475 while (p->more_l || p->more_r)
479 if (p->more_l && p->more_r)
480 cmp = (*info->cmp)(p->buf_l, p->buf_r);
487 memcpy (buf, p->buf_l, info->key_size);
488 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
489 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
491 logf (LOG_DEBUG, "r_read_or returning A m=%d/%d c=%d",
492 p->more_l, p->more_r, cmp);
493 (*info->log_item)(LOG_DEBUG, buf, "");
500 memcpy (buf, p->buf_r, info->key_size);
501 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
503 logf (LOG_DEBUG, "r_read_or returning B m=%d/%d c=%d",
504 p->more_l, p->more_r, cmp);
505 (*info->log_item)(LOG_DEBUG, buf, "");
512 memcpy (buf, p->buf_l, info->key_size);
513 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
515 logf (LOG_DEBUG, "r_read_or returning C m=%d/%d c=%d",
516 p->more_l, p->more_r, cmp);
517 (*info->log_item)(LOG_DEBUG, buf, "");
526 static int r_read_not (RSFD rfd, void *buf)
528 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
529 struct rset_bool_info *info = p->info;
531 while (p->more_l || p->more_r)
535 if (p->more_l && p->more_r)
536 cmp = (*info->cmp)(p->buf_l, p->buf_r);
543 memcpy (buf, p->buf_l, info->key_size);
544 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
550 p->more_r = rset_forward(
551 info->rset_r, p->rfd_r,
552 p->buf_r, (info->cmp), p->buf_l);
556 memcpy (buf, p->buf_l, info->key_size);
559 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
562 cmp = (*info->cmp)(p->buf_l, buf);
563 } while (cmp >= -1 && cmp <= 1);
566 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
569 cmp = (*info->cmp)(p->buf_r, buf);
570 } while (cmp >= -1 && cmp <= 1);
577 static int r_write (RSFD rfd, const void *buf)
579 logf (LOG_FATAL, "bool set type is read-only");
583 static void r_pos (RSFD rfd, double *current, double *total)
585 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
586 struct rset_bool_info *info = p->info;
591 rset_pos(info->rset_l, p->rfd_l, &lcur, <ot);
592 rset_pos(info->rset_r, p->rfd_r, &rcur, &rtot);
593 if ( (rtot<0) && (ltot<0)) { /*no position */
594 *current=rcur; /* return same as you got */
595 *total=rtot; /* probably -1 for not available */
597 if ( rtot<0) { rtot=0; rcur=0;} /* if only one useful, use it */
598 if ( ltot<0) { ltot=0; lcur=0;}
599 if ( rtot+ltot < 1 ) { /* empty rset */
604 r=1.0*(lcur+rcur)/(ltot+rtot); /* weighed average of l and r */
605 *current=(double) (p->hits);
608 yaz_log(LOG_DEBUG,"bool_pos: (%s/%s) %0.1f/%0.1f= %0.4f ",
609 info->rset_l->control->desc, info->rset_r->control->desc,
610 *current, *total, r);