1 /* $Id: rsbool.c,v 1.27 2004-06-01 15:22:58 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
31 /* for key_logdump. Debugging only */
32 #include <../index/index.h>
38 static void *r_create(RSET ct, const struct rset_control *sel, void *parms);
39 static RSFD r_open (RSET ct, int flag);
40 static void r_close (RSFD rfd);
41 static void r_delete (RSET ct);
42 static void r_rewind (RSFD rfd);
43 static int r_forward(RSET ct, RSFD rfd, void *buf, int *term_index,
44 int (*cmpfunc)(const void *p1, const void *p2),
45 const void *untilbuf);
46 static int r_count (RSET ct);
47 static int r_read_and (RSFD rfd, void *buf, int *term_index);
48 static int r_read_or (RSFD rfd, void *buf, int *term_index);
49 static int r_read_not (RSFD rfd, void *buf, int *term_index);
50 static int r_write (RSFD rfd, const void *buf);
52 static const struct rset_control control_and =
60 r_forward, /* rset_default_forward, */
66 static const struct rset_control control_or =
84 static const struct rset_control control_not =
99 const struct rset_control *rset_kind_and = &control_and;
100 const struct rset_control *rset_kind_or = &control_or;
101 const struct rset_control *rset_kind_not = &control_not;
103 struct rset_bool_info {
108 int (*cmp)(const void *p1, const void *p2);
109 struct rset_bool_rfd *rfd_list;
112 struct rset_bool_rfd {
122 struct rset_bool_rfd *next;
123 struct rset_bool_info *info;
126 static void *r_create (RSET ct, const struct rset_control *sel, void *parms)
128 rset_bool_parms *bool_parms = (rset_bool_parms *) parms;
129 struct rset_bool_info *info;
131 info = (struct rset_bool_info *) xmalloc (sizeof(*info));
132 info->key_size = bool_parms->key_size;
133 info->rset_l = bool_parms->rset_l;
134 info->rset_r = bool_parms->rset_r;
135 if (rset_is_volatile(info->rset_l) || rset_is_volatile(info->rset_r))
136 ct->flags |= RSET_FLAG_VOLATILE;
137 info->cmp = bool_parms->cmp;
138 info->rfd_list = NULL;
140 info->term_index_s = info->rset_l->no_rset_terms;
142 info->rset_l->no_rset_terms + info->rset_r->no_rset_terms;
143 ct->rset_terms = (RSET_TERM *)
144 xmalloc (sizeof (*ct->rset_terms) * ct->no_rset_terms);
146 memcpy (ct->rset_terms, info->rset_l->rset_terms,
147 info->rset_l->no_rset_terms * sizeof(*ct->rset_terms));
148 memcpy (ct->rset_terms + info->rset_l->no_rset_terms,
149 info->rset_r->rset_terms,
150 info->rset_r->no_rset_terms * sizeof(*ct->rset_terms));
154 static RSFD r_open (RSET ct, int flag)
156 struct rset_bool_info *info = (struct rset_bool_info *) ct->buf;
157 struct rset_bool_rfd *rfd;
159 if (flag & RSETF_WRITE)
161 logf (LOG_FATAL, "bool set type is read-only");
164 rfd = (struct rset_bool_rfd *) xmalloc (sizeof(*rfd));
165 logf(LOG_DEBUG,"rsbool (%s) open [%p]", ct->control->desc, rfd);
166 rfd->next = info->rfd_list;
167 info->rfd_list = rfd;
170 rfd->buf_l = xmalloc (info->key_size);
171 rfd->buf_r = xmalloc (info->key_size);
172 rfd->rfd_l = rset_open (info->rset_l, RSETF_READ);
173 rfd->rfd_r = rset_open (info->rset_r, RSETF_READ);
174 rfd->more_l = rset_read (info->rset_l, rfd->rfd_l, rfd->buf_l,
176 rfd->more_r = rset_read (info->rset_r, rfd->rfd_r, rfd->buf_r,
182 static void r_close (RSFD rfd)
184 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
185 struct rset_bool_rfd **rfdp;
187 for (rfdp = &info->rfd_list; *rfdp; rfdp = &(*rfdp)->next)
190 xfree ((*rfdp)->buf_l);
191 xfree ((*rfdp)->buf_r);
192 rset_close (info->rset_l, (*rfdp)->rfd_l);
193 rset_close (info->rset_r, (*rfdp)->rfd_r);
194 *rfdp = (*rfdp)->next;
198 logf (LOG_FATAL, "r_close but no rfd match!");
202 static void r_delete (RSET ct)
204 struct rset_bool_info *info = (struct rset_bool_info *) ct->buf;
206 assert (info->rfd_list == NULL);
207 xfree (ct->rset_terms);
208 rset_delete (info->rset_l);
209 rset_delete (info->rset_r);
213 static void r_rewind (RSFD rfd)
215 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
216 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
218 logf (LOG_DEBUG, "rsbool_rewind");
219 rset_rewind (info->rset_l, p->rfd_l);
220 rset_rewind (info->rset_r, p->rfd_r);
221 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l, &p->term_index_l);
222 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r, &p->term_index_r);
225 static int r_forward (RSET ct, RSFD rfd, void *buf, int *term_index,
226 int (*cmpfunc)(const void *p1, const void *p2),
227 const void *untilbuf)
229 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
230 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
235 logf (LOG_DEBUG, "rsbool_forward (L) [%p] '%s' (ct=%p rfd=%p m=%d,%d)",
236 rfd, ct->control->desc, ct, rfd, p->more_l, p->more_r);
238 if ( p->more_l && ((cmpfunc)(untilbuf,p->buf_l)==2) )
239 p->more_l = rset_forward(info->rset_l, p->rfd_l, p->buf_l,
240 &p->term_index_l, info->cmp, untilbuf);
242 logf (LOG_DEBUG, "rsbool_forward (R) [%p] '%s' (ct=%p rfd=%p m=%d,%d)",
243 rfd, ct->control->desc, ct, rfd, p->more_l, p->more_r);
245 if ( p->more_r && ((cmpfunc)(untilbuf,p->buf_r)==2))
246 p->more_r = rset_forward(info->rset_r, p->rfd_r, p->buf_r,
247 &p->term_index_r, info->cmp, untilbuf);
249 logf (LOG_DEBUG, "rsbool_forward [%p] calling read, m=%d,%d t=%d",
250 rfd, p->more_l, p->more_r, p->tail);
254 rc = rset_read(ct,rfd,buf,term_index);
256 logf (LOG_DEBUG, "rsbool_forward returning [%p] %d m=%d,%d",
257 rfd, rc, p->more_l, p->more_r);
261 if (p->more_l && p->more_r)
262 cmp = (*info->cmp)(p->buf_l, p->buf_r);
267 if ( (cmp<0) && (p->more_l) )
269 memcpy (buf, p->buf_l, info->key_size);
270 *term_index = p->term_index_l;
272 logf (LOG_DEBUG, "rsbool_forward returning L (cmp=%d)",cmp);
275 } else if ( (cmp>0) && (p->more_r) )
277 memcpy (buf, p->buf_r, info->key_size);
278 *term_index = p->term_index_r + info->term_index_s;
280 logf (LOG_DEBUG, "rsbool_forward returning R (cmp=%d)",cmp);
284 /* return ( p->more_l || p->more_r); */
288 static int r_count (RSET ct)
309 static int r_read_and (RSFD rfd, void *buf, int *term_index)
311 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
312 struct rset_bool_info *info = p->info;
314 while (p->more_l || p->more_r)
318 if (p->more_l && p->more_r)
319 cmp = (*info->cmp)(p->buf_l, p->buf_r);
325 logf (LOG_DEBUG, "r_read_and [%p] looping: m=%d/%d c=%d t=%d",
326 rfd, p->more_l, p->more_r, cmp, p->tail);
327 key_logdump(LOG_DEBUG,p->buf_l);
328 key_logdump(LOG_DEBUG,p->buf_r);
332 memcpy (buf, p->buf_l, info->key_size);
333 *term_index = p->term_index_l;
334 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
340 memcpy (buf, p->buf_r, info->key_size);
341 *term_index = p->term_index_r + info->term_index_s;
342 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);
354 memcpy (buf, p->buf_l, info->key_size);
355 *term_index = p->term_index_l;
356 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 key_logdump(LOG_DEBUG,buf);
366 else if (cmp > 1) /* cmp == 2 */
370 memcpy (buf, p->buf_r, info->key_size);
371 *term_index = p->term_index_r + info->term_index_s;
373 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
377 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
380 logf (LOG_DEBUG, "r_read_and returning C m=%d/%d c=%d",
381 p->more_l, p->more_r, cmp);
382 key_logdump(LOG_DEBUG,buf);
390 memcpy (buf, p->buf_r, info->key_size);
391 *term_index = p->term_index_r + info->term_index_s;
392 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
394 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
397 logf (LOG_DEBUG, "r_read_and [%p] returning R tail m=%d/%d c=%d",
398 rfd, p->more_l, p->more_r, cmp);
399 key_logdump(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(
410 info->rset_r, p->rfd_r,
411 p->buf_r, &p->term_index_r,
412 (info->cmp), p->buf_l);
414 return 0; /* no point in reading further */
421 memcpy (buf, p->buf_l, info->key_size);
422 *term_index = p->term_index_l;
423 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
427 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
430 logf (LOG_DEBUG, "r_read_and [%p] returning R tail m=%d/%d c=%d",
431 rfd, p->more_l, p->more_r, cmp);
432 key_logdump(LOG_DEBUG,buf);
439 memcpy (buf, p->buf_l, info->key_size);
440 *term_index = p->term_index_l;
441 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
443 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
446 logf (LOG_DEBUG, "r_read_and [%p] returning L tail m=%d/%d c=%d",
447 rfd, p->more_l, p->more_r, cmp);
448 key_logdump(LOG_DEBUG,buf);
455 logf (LOG_DEBUG, "r_read_and [%p] about to forward L m=%d/%d c=%d",
456 rfd, p->more_l, p->more_r, cmp);
458 if (p->more_r && p->more_l)
459 p->more_l = rset_forward(
460 /* p->more_l = rset_default_forward( */
461 info->rset_l, p->rfd_l,
462 p->buf_l, &p->term_index_l,
463 (info->cmp), p->buf_r);
465 return 0; /* no point in reading further */
471 logf (LOG_DEBUG, "r_read_and [%p] reached its end",rfd);
476 static int r_read_or (RSFD rfd, void *buf, int *term_index)
478 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
479 struct rset_bool_info *info = p->info;
481 while (p->more_l || p->more_r)
485 if (p->more_l && p->more_r)
486 cmp = (*info->cmp)(p->buf_l, p->buf_r);
493 memcpy (buf, p->buf_l, info->key_size);
494 *term_index = p->term_index_l;
495 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
497 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
500 logf (LOG_DEBUG, "r_read_or returning A m=%d/%d c=%d",
501 p->more_l, p->more_r, cmp);
502 key_logdump(LOG_DEBUG,buf);
508 memcpy (buf, p->buf_r, info->key_size);
509 *term_index = p->term_index_r + info->term_index_s;
510 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
513 logf (LOG_DEBUG, "r_read_or returning B m=%d/%d c=%d",
514 p->more_l, p->more_r, cmp);
515 key_logdump(LOG_DEBUG,buf);
521 memcpy (buf, p->buf_l, info->key_size);
522 *term_index = p->term_index_l;
523 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
526 logf (LOG_DEBUG, "r_read_or returning C m=%d/%d c=%d",
527 p->more_l, p->more_r, cmp);
528 key_logdump(LOG_DEBUG,buf);
536 static int r_read_not (RSFD rfd, void *buf, int *term_index)
538 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
539 struct rset_bool_info *info = p->info;
541 while (p->more_l || p->more_r)
545 if (p->more_l && p->more_r)
546 cmp = (*info->cmp)(p->buf_l, p->buf_r);
553 memcpy (buf, p->buf_l, info->key_size);
554 *term_index = p->term_index_l;
555 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
561 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
564 p->more_r = rset_forward(
565 info->rset_r, p->rfd_r,
566 p->buf_r, &p->term_index_r,
567 (info->cmp), p->buf_l);
571 memcpy (buf, p->buf_l, info->key_size);
574 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
578 cmp = (*info->cmp)(p->buf_l, buf);
579 } while (cmp >= -1 && cmp <= 1);
582 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
586 cmp = (*info->cmp)(p->buf_r, buf);
587 } while (cmp >= -1 && cmp <= 1);
594 static int r_write (RSFD rfd, const void *buf)
596 logf (LOG_FATAL, "bool set type is read-only");