1 /* $Id: rsbool.c,v 1.26 2004-05-30 18:09:31 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
33 /* for key_logdump. Debugging only */
34 #include <../index/index.h>
36 static void *r_create(RSET ct, const struct rset_control *sel, void *parms);
37 static RSFD r_open (RSET ct, int flag);
38 static void r_close (RSFD rfd);
39 static void r_delete (RSET ct);
40 static void r_rewind (RSFD rfd);
41 static int r_forward(RSET ct, RSFD rfd, void *buf, int *term_index,
42 int (*cmpfunc)(const void *p1, const void *p2),
43 const void *untilbuf);
44 static int r_count (RSET ct);
45 static int r_read_and (RSFD rfd, void *buf, int *term_index);
46 static int r_read_or (RSFD rfd, void *buf, int *term_index);
47 static int r_read_not (RSFD rfd, void *buf, int *term_index);
48 static int r_write (RSFD rfd, const void *buf);
50 static const struct rset_control control_and =
58 r_forward, /* rset_default_forward, */
64 static const struct rset_control control_or =
82 static const struct rset_control control_not =
97 const struct rset_control *rset_kind_and = &control_and;
98 const struct rset_control *rset_kind_or = &control_or;
99 const struct rset_control *rset_kind_not = &control_not;
101 struct rset_bool_info {
106 int (*cmp)(const void *p1, const void *p2);
107 struct rset_bool_rfd *rfd_list;
110 struct rset_bool_rfd {
120 struct rset_bool_rfd *next;
121 struct rset_bool_info *info;
124 static void *r_create (RSET ct, const struct rset_control *sel, void *parms)
126 rset_bool_parms *bool_parms = (rset_bool_parms *) parms;
127 struct rset_bool_info *info;
129 info = (struct rset_bool_info *) xmalloc (sizeof(*info));
130 info->key_size = bool_parms->key_size;
131 info->rset_l = bool_parms->rset_l;
132 info->rset_r = bool_parms->rset_r;
133 if (rset_is_volatile(info->rset_l) || rset_is_volatile(info->rset_r))
134 ct->flags |= RSET_FLAG_VOLATILE;
135 info->cmp = bool_parms->cmp;
136 info->rfd_list = NULL;
138 info->term_index_s = info->rset_l->no_rset_terms;
140 info->rset_l->no_rset_terms + info->rset_r->no_rset_terms;
141 ct->rset_terms = (RSET_TERM *)
142 xmalloc (sizeof (*ct->rset_terms) * ct->no_rset_terms);
144 memcpy (ct->rset_terms, info->rset_l->rset_terms,
145 info->rset_l->no_rset_terms * sizeof(*ct->rset_terms));
146 memcpy (ct->rset_terms + info->rset_l->no_rset_terms,
147 info->rset_r->rset_terms,
148 info->rset_r->no_rset_terms * sizeof(*ct->rset_terms));
152 static RSFD r_open (RSET ct, int flag)
154 struct rset_bool_info *info = (struct rset_bool_info *) ct->buf;
155 struct rset_bool_rfd *rfd;
157 if (flag & RSETF_WRITE)
159 logf (LOG_FATAL, "bool set type is read-only");
162 rfd = (struct rset_bool_rfd *) xmalloc (sizeof(*rfd));
163 logf(LOG_DEBUG,"rsbool (%s) open [%p]", ct->control->desc, rfd);
164 rfd->next = info->rfd_list;
165 info->rfd_list = rfd;
168 rfd->buf_l = xmalloc (info->key_size);
169 rfd->buf_r = xmalloc (info->key_size);
170 rfd->rfd_l = rset_open (info->rset_l, RSETF_READ);
171 rfd->rfd_r = rset_open (info->rset_r, RSETF_READ);
172 rfd->more_l = rset_read (info->rset_l, rfd->rfd_l, rfd->buf_l,
174 rfd->more_r = rset_read (info->rset_r, rfd->rfd_r, rfd->buf_r,
180 static void r_close (RSFD rfd)
182 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
183 struct rset_bool_rfd **rfdp;
185 for (rfdp = &info->rfd_list; *rfdp; rfdp = &(*rfdp)->next)
188 xfree ((*rfdp)->buf_l);
189 xfree ((*rfdp)->buf_r);
190 rset_close (info->rset_l, (*rfdp)->rfd_l);
191 rset_close (info->rset_r, (*rfdp)->rfd_r);
192 *rfdp = (*rfdp)->next;
196 logf (LOG_FATAL, "r_close but no rfd match!");
200 static void r_delete (RSET ct)
202 struct rset_bool_info *info = (struct rset_bool_info *) ct->buf;
204 assert (info->rfd_list == NULL);
205 xfree (ct->rset_terms);
206 rset_delete (info->rset_l);
207 rset_delete (info->rset_r);
211 static void r_rewind (RSFD rfd)
213 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
214 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
216 logf (LOG_DEBUG, "rsbool_rewind");
217 rset_rewind (info->rset_l, p->rfd_l);
218 rset_rewind (info->rset_r, p->rfd_r);
219 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l, &p->term_index_l);
220 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r, &p->term_index_r);
223 static int r_forward (RSET ct, RSFD rfd, void *buf, int *term_index,
224 int (*cmpfunc)(const void *p1, const void *p2),
225 const void *untilbuf)
227 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
228 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
233 logf (LOG_DEBUG, "rsbool_forward (L) [%p] '%s' (ct=%p rfd=%p m=%d,%d)",
234 rfd, ct->control->desc, ct, rfd, p->more_l, p->more_r);
236 if ( p->more_l && ((cmpfunc)(untilbuf,p->buf_l)==2) )
237 p->more_l = rset_forward(info->rset_l, p->rfd_l, p->buf_l,
238 &p->term_index_l, info->cmp, untilbuf);
240 logf (LOG_DEBUG, "rsbool_forward (R) [%p] '%s' (ct=%p rfd=%p m=%d,%d)",
241 rfd, ct->control->desc, ct, rfd, p->more_l, p->more_r);
243 if ( p->more_r && ((cmpfunc)(untilbuf,p->buf_r)==2))
244 p->more_r = rset_forward(info->rset_r, p->rfd_r, p->buf_r,
245 &p->term_index_r, info->cmp, untilbuf);
247 logf (LOG_DEBUG, "rsbool_forward [%p] calling read, m=%d,%d t=%d",
248 rfd, p->more_l, p->more_r, p->tail);
252 rc = rset_read(ct,rfd,buf,term_index);
254 logf (LOG_DEBUG, "rsbool_forward returning [%p] %d m=%d,%d",
255 rfd, rc, p->more_l, p->more_r);
259 if (p->more_l && p->more_r)
260 cmp = (*info->cmp)(p->buf_l, p->buf_r);
265 if ( (cmp<0) && (p->more_l) )
267 memcpy (buf, p->buf_l, info->key_size);
268 *term_index = p->term_index_l;
270 logf (LOG_DEBUG, "rsbool_forward returning L (cmp=%d)",cmp);
273 } else if ( (cmp>0) && (p->more_r) )
275 memcpy (buf, p->buf_r, info->key_size);
276 *term_index = p->term_index_r + info->term_index_s;
278 logf (LOG_DEBUG, "rsbool_forward returning R (cmp=%d)",cmp);
282 /* return ( p->more_l || p->more_r); */
286 static int r_count (RSET ct)
307 static int r_read_and (RSFD rfd, void *buf, int *term_index)
309 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
310 struct rset_bool_info *info = p->info;
312 while (p->more_l || p->more_r)
316 if (p->more_l && p->more_r)
317 cmp = (*info->cmp)(p->buf_l, p->buf_r);
323 logf (LOG_DEBUG, "r_read_and [%p] looping: m=%d/%d c=%d t=%d",
324 rfd, p->more_l, p->more_r, cmp, p->tail);
325 key_logdump(LOG_DEBUG,p->buf_l);
326 key_logdump(LOG_DEBUG,p->buf_r);
330 memcpy (buf, p->buf_l, info->key_size);
331 *term_index = p->term_index_l;
332 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
338 memcpy (buf, p->buf_r, info->key_size);
339 *term_index = p->term_index_r + info->term_index_s;
340 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
344 logf (LOG_DEBUG, "r_read_and [%p] returning R m=%d/%d c=%d",
345 rfd, p->more_l, p->more_r, cmp);
346 key_logdump(LOG_DEBUG,buf);
352 memcpy (buf, p->buf_l, info->key_size);
353 *term_index = p->term_index_l;
354 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
358 logf (LOG_DEBUG, "r_read_and [%p] returning L m=%d/%d c=%d",
359 rfd, p->more_l, p->more_r, cmp);
360 key_logdump(LOG_DEBUG,buf);
364 else if (cmp > 1) /* cmp == 2 */
368 memcpy (buf, p->buf_r, info->key_size);
369 *term_index = p->term_index_r + info->term_index_s;
371 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
375 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
378 logf (LOG_DEBUG, "r_read_and returning C m=%d/%d c=%d",
379 p->more_l, p->more_r, cmp);
380 key_logdump(LOG_DEBUG,buf);
388 memcpy (buf, p->buf_r, info->key_size);
389 *term_index = p->term_index_r + info->term_index_s;
390 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 key_logdump(LOG_DEBUG,buf);
403 logf (LOG_DEBUG, "r_read_and [%p] about to forward R m=%d/%d c=%d",
404 rfd, p->more_l, p->more_r, cmp);
406 if (p->more_r && p->more_l)
407 p->more_r = rset_forward(
408 info->rset_r, p->rfd_r,
409 p->buf_r, &p->term_index_r,
410 (info->cmp), p->buf_l);
412 return 0; /* no point in reading further */
419 memcpy (buf, p->buf_l, info->key_size);
420 *term_index = p->term_index_l;
421 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 R tail m=%d/%d c=%d",
429 rfd, p->more_l, p->more_r, cmp);
430 key_logdump(LOG_DEBUG,buf);
437 memcpy (buf, p->buf_l, info->key_size);
438 *term_index = p->term_index_l;
439 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
441 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
444 logf (LOG_DEBUG, "r_read_and [%p] returning L tail m=%d/%d c=%d",
445 rfd, p->more_l, p->more_r, cmp);
446 key_logdump(LOG_DEBUG,buf);
453 logf (LOG_DEBUG, "r_read_and [%p] about to forward L m=%d/%d c=%d",
454 rfd, p->more_l, p->more_r, cmp);
456 if (p->more_r && p->more_l)
457 p->more_l = rset_forward(
458 /* p->more_l = rset_default_forward( */
459 info->rset_l, p->rfd_l,
460 p->buf_l, &p->term_index_l,
461 (info->cmp), p->buf_r);
463 return 0; /* no point in reading further */
469 logf (LOG_DEBUG, "r_read_and [%p] reached its end",rfd);
474 static int r_read_or (RSFD rfd, void *buf, int *term_index)
476 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
477 struct rset_bool_info *info = p->info;
479 while (p->more_l || p->more_r)
483 if (p->more_l && p->more_r)
484 cmp = (*info->cmp)(p->buf_l, p->buf_r);
491 memcpy (buf, p->buf_l, info->key_size);
492 *term_index = p->term_index_l;
493 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
495 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
498 logf (LOG_DEBUG, "r_read_or returning A m=%d/%d c=%d",
499 p->more_l, p->more_r, cmp);
500 key_logdump(LOG_DEBUG,buf);
506 memcpy (buf, p->buf_r, info->key_size);
507 *term_index = p->term_index_r + info->term_index_s;
508 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
511 logf (LOG_DEBUG, "r_read_or returning B m=%d/%d c=%d",
512 p->more_l, p->more_r, cmp);
513 key_logdump(LOG_DEBUG,buf);
519 memcpy (buf, p->buf_l, info->key_size);
520 *term_index = p->term_index_l;
521 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
524 logf (LOG_DEBUG, "r_read_or returning C m=%d/%d c=%d",
525 p->more_l, p->more_r, cmp);
526 key_logdump(LOG_DEBUG,buf);
534 static int r_read_not (RSFD rfd, void *buf, int *term_index)
536 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
537 struct rset_bool_info *info = p->info;
539 while (p->more_l || p->more_r)
543 if (p->more_l && p->more_r)
544 cmp = (*info->cmp)(p->buf_l, p->buf_r);
551 memcpy (buf, p->buf_l, info->key_size);
552 *term_index = p->term_index_l;
553 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
559 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
562 p->more_r = rset_forward(
563 info->rset_r, p->rfd_r,
564 p->buf_r, &p->term_index_r,
565 (info->cmp), p->buf_l);
569 memcpy (buf, p->buf_l, info->key_size);
572 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
576 cmp = (*info->cmp)(p->buf_l, buf);
577 } while (cmp >= -1 && cmp <= 1);
580 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
584 cmp = (*info->cmp)(p->buf_r, buf);
585 } while (cmp >= -1 && cmp <= 1);
592 static int r_write (RSFD rfd, const void *buf)
594 logf (LOG_FATAL, "bool set type is read-only");