1 /* $Id: rsbool.c,v 1.40 2004-08-24 14:25:16 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);
170 /* xfree (info); */ /* nmem'd */
174 static void *r_create (RSET ct, const struct rset_control *sel, void *parms)
176 rset_bool_parms *bool_parms = (rset_bool_parms *) parms;
177 struct rset_bool_info *info;
179 info = (struct rset_bool_info *) xmalloc (sizeof(*info));
180 info->key_size = bool_parms->key_size;
181 info->rset_l = bool_parms->rset_l;
182 info->rset_r = bool_parms->rset_r;
183 info->cmp = bool_parms->cmp;
184 info->log_item = bool_parms->log_item;
185 info->rfd_list = NULL;
191 static RSFD r_open (RSET ct, int flag)
193 struct rset_bool_info *info = (struct rset_bool_info *) ct->priv;
194 struct rset_bool_rfd *rfd;
196 if (flag & RSETF_WRITE)
198 logf (LOG_FATAL, "bool set type is read-only");
201 rfd = (struct rset_bool_rfd *) xmalloc (sizeof(*rfd));
202 logf(LOG_DEBUG,"rsbool (%s) open [%p]", ct->control->desc, rfd);
203 rfd->next = info->rfd_list;
204 info->rfd_list = rfd;
208 rfd->buf_l = xmalloc (info->key_size);
209 rfd->buf_r = xmalloc (info->key_size);
210 rfd->rfd_l = rset_open (info->rset_l, RSETF_READ);
211 rfd->rfd_r = rset_open (info->rset_r, RSETF_READ);
212 rfd->more_l = rset_read (info->rset_l, rfd->rfd_l, rfd->buf_l);
213 rfd->more_r = rset_read (info->rset_r, rfd->rfd_r, rfd->buf_r);
218 static void r_close (RSFD rfd)
220 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
221 struct rset_bool_rfd **rfdp;
223 for (rfdp = &info->rfd_list; *rfdp; rfdp = &(*rfdp)->next)
226 xfree ((*rfdp)->buf_l);
227 xfree ((*rfdp)->buf_r);
228 rset_close (info->rset_l, (*rfdp)->rfd_l);
229 rset_close (info->rset_r, (*rfdp)->rfd_r);
230 *rfdp = (*rfdp)->next;
234 logf (LOG_FATAL, "r_close but no rfd match!");
239 static void r_rewind (RSFD rfd)
241 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
242 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
244 logf (LOG_DEBUG, "rsbool_rewind");
245 rset_rewind (info->rset_l, p->rfd_l);
246 rset_rewind (info->rset_r, p->rfd_r);
247 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
248 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
252 static int r_forward (RSET ct, RSFD rfd, void *buf,
253 int (*cmpfunc)(const void *p1, const void *p2),
254 const void *untilbuf)
256 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
257 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
261 logf (LOG_DEBUG, "rsbool_forward (L) [%p] '%s' (ct=%p rfd=%p m=%d,%d)",
262 rfd, ct->control->desc, ct, rfd, p->more_l, p->more_r);
264 if ( p->more_l && ((cmpfunc)(untilbuf,p->buf_l)==2) )
265 p->more_l = rset_forward(info->rset_l, p->rfd_l, p->buf_l,
266 info->cmp, untilbuf);
268 logf (LOG_DEBUG, "rsbool_forward (R) [%p] '%s' (ct=%p rfd=%p m=%d,%d)",
269 rfd, ct->control->desc, ct, rfd, p->more_l, p->more_r);
271 if ( p->more_r && ((cmpfunc)(untilbuf,p->buf_r)==2))
272 p->more_r = rset_forward(info->rset_r, p->rfd_r, p->buf_r,
273 info->cmp, untilbuf);
275 logf (LOG_DEBUG, "rsbool_forward [%p] calling read, m=%d,%d t=%d",
276 rfd, p->more_l, p->more_r, p->tail);
280 rc = rset_read(ct,rfd,buf);
282 logf (LOG_DEBUG, "rsbool_forward returning [%p] %d m=%d,%d",
283 rfd, rc, p->more_l, p->more_r);
304 static int r_read_and (RSFD rfd, void *buf)
306 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
307 struct rset_bool_info *info = p->info;
309 while (p->more_l || p->more_r)
313 if (p->more_l && p->more_r)
314 cmp = (*info->cmp)(p->buf_l, p->buf_r);
320 logf (LOG_DEBUG, "r_read_and [%p] looping: m=%d/%d c=%d t=%d",
321 rfd, p->more_l, p->more_r, cmp, p->tail);
322 (*info->log_item)(LOG_DEBUG, p->buf_l, "left ");
323 (*info->log_item)(LOG_DEBUG, p->buf_r, "right ");
327 memcpy (buf, p->buf_l, info->key_size);
328 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
333 memcpy (buf, p->buf_r, info->key_size);
334 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
337 logf (LOG_DEBUG, "r_read_and [%p] returning R m=%d/%d c=%d",
338 rfd, p->more_l, p->more_r, cmp);
339 key_logdump(LOG_DEBUG,buf);
340 (*info->log_item)(LOG_DEBUG, buf, "");
347 memcpy (buf, p->buf_l, info->key_size);
348 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
351 logf (LOG_DEBUG, "r_read_and [%p] returning L m=%d/%d c=%d",
352 rfd, p->more_l, p->more_r, cmp);
353 (*info->log_item)(LOG_DEBUG, buf, "");
358 else if (cmp > 1) /* cmp == 2 */
362 memcpy (buf, p->buf_r, info->key_size);
364 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
367 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
370 logf (LOG_DEBUG, "r_read_and returning C m=%d/%d c=%d",
371 p->more_l, p->more_r, cmp);
372 (*info->log_item)(LOG_DEBUG, buf, "");
381 memcpy (buf, p->buf_r, info->key_size);
382 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
383 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
386 logf (LOG_DEBUG, "r_read_and [%p] returning R tail m=%d/%d c=%d",
387 rfd, p->more_l, p->more_r, cmp);
388 (*info->log_item)(LOG_DEBUG, buf, "");
396 logf (LOG_DEBUG, "r_read_and [%p] about to forward R m=%d/%d c=%d",
397 rfd, p->more_l, p->more_r, cmp);
399 if (p->more_r && p->more_l)
400 p->more_r = rset_forward( info->rset_r, p->rfd_r,
401 p->buf_r, (info->cmp), p->buf_l);
403 return 0; /* no point in reading further */
410 memcpy (buf, p->buf_l, info->key_size);
411 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
414 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
417 logf (LOG_DEBUG, "r_read_and [%p] returning R tail m=%d/%d c=%d",
418 rfd, p->more_l, p->more_r, cmp);
419 (*info->log_item)(LOG_DEBUG, buf, "");
427 memcpy (buf, p->buf_l, info->key_size);
428 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
429 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
432 logf (LOG_DEBUG, "r_read_and [%p] returning L tail m=%d/%d c=%d",
433 rfd, p->more_l, p->more_r, cmp);
434 (*info->log_item)(LOG_DEBUG, buf, "");
442 logf (LOG_DEBUG, "r_read_and [%p] about to forward L m=%d/%d c=%d",
443 rfd, p->more_l, p->more_r, cmp);
445 if (p->more_r && p->more_l)
446 p->more_l = rset_forward(
447 info->rset_l, p->rfd_l,
448 p->buf_l, (info->cmp), p->buf_r);
450 return 0; /* no point in reading further */
456 logf (LOG_DEBUG, "r_read_and [%p] reached its end",rfd);
461 static int r_read_or (RSFD rfd, void *buf)
463 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
464 struct rset_bool_info *info = p->info;
466 while (p->more_l || p->more_r)
470 if (p->more_l && p->more_r)
471 cmp = (*info->cmp)(p->buf_l, p->buf_r);
478 memcpy (buf, p->buf_l, info->key_size);
479 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
480 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
482 logf (LOG_DEBUG, "r_read_or returning A m=%d/%d c=%d",
483 p->more_l, p->more_r, cmp);
484 (*info->log_item)(LOG_DEBUG, buf, "");
491 memcpy (buf, p->buf_r, info->key_size);
492 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
494 logf (LOG_DEBUG, "r_read_or returning B m=%d/%d c=%d",
495 p->more_l, p->more_r, cmp);
496 (*info->log_item)(LOG_DEBUG, buf, "");
503 memcpy (buf, p->buf_l, info->key_size);
504 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
506 logf (LOG_DEBUG, "r_read_or returning C m=%d/%d c=%d",
507 p->more_l, p->more_r, cmp);
508 (*info->log_item)(LOG_DEBUG, buf, "");
517 static int r_read_not (RSFD rfd, void *buf)
519 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
520 struct rset_bool_info *info = p->info;
522 while (p->more_l || p->more_r)
526 if (p->more_l && p->more_r)
527 cmp = (*info->cmp)(p->buf_l, p->buf_r);
534 memcpy (buf, p->buf_l, info->key_size);
535 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
541 p->more_r = rset_forward(
542 info->rset_r, p->rfd_r,
543 p->buf_r, (info->cmp), p->buf_l);
547 memcpy (buf, p->buf_l, info->key_size);
550 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l);
553 cmp = (*info->cmp)(p->buf_l, buf);
554 } while (cmp >= -1 && cmp <= 1);
557 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r);
560 cmp = (*info->cmp)(p->buf_r, buf);
561 } while (cmp >= -1 && cmp <= 1);
568 static int r_write (RSFD rfd, const void *buf)
570 logf (LOG_FATAL, "bool set type is read-only");
574 static void r_pos (RSFD rfd, double *current, double *total)
576 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
577 struct rset_bool_info *info = p->info;
582 rset_pos(info->rset_l, p->rfd_l, &lcur, <ot);
583 rset_pos(info->rset_r, p->rfd_r, &rcur, &rtot);
584 if ( (rtot<0) && (ltot<0)) { /*no position */
585 *current=rcur; /* return same as you got */
586 *total=rtot; /* probably -1 for not available */
588 if ( rtot<0) { rtot=0; rcur=0;} /* if only one useful, use it */
589 if ( ltot<0) { ltot=0; lcur=0;}
590 if ( rtot+ltot < 1 ) { /* empty rset */
595 r=1.0*(lcur+rcur)/(ltot+rtot); /* weighed average of l and r */
596 *current=(double) (p->hits);
599 yaz_log(LOG_DEBUG,"bool_pos: (%s/%s) %0.1f/%0.1f= %0.4f ",
600 info->rset_l->control->desc, info->rset_r->control->desc,
601 *current, *total, r);