1 /* $Id: rsbool.c,v 1.25 2004-02-12 15:15:54 heikki Exp $
2 Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003
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 #include <../index/index.h> /* for log_keydump. Debugging only */
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;
232 logf (LOG_DEBUG, "rsbool_forward (L) [%p] '%s' (ct=%p rfd=%p m=%d,%d)",
233 rfd, ct->control->desc, ct, rfd, p->more_l, p->more_r);
234 if ( p->more_l && ((cmpfunc)(untilbuf,p->buf_l)==2) )
235 p->more_l = rset_forward(info->rset_l, p->rfd_l, p->buf_l,
236 &p->term_index_l, info->cmp, untilbuf);
238 logf (LOG_DEBUG, "rsbool_forward (R) [%p] '%s' (ct=%p rfd=%p m=%d,%d)",
239 rfd, ct->control->desc, ct, rfd, p->more_l, p->more_r);
240 if ( p->more_r && ((cmpfunc)(untilbuf,p->buf_r)==2))
241 p->more_r = rset_forward(info->rset_r, p->rfd_r, p->buf_r,
242 &p->term_index_r, info->cmp, untilbuf);
244 logf (LOG_DEBUG, "rsbool_forward [%p] calling read, m=%d,%d t=%d",
245 rfd, p->more_l, p->more_r, p->tail);
248 rc = rset_read(ct,rfd,buf,term_index);
249 logf (LOG_DEBUG, "rsbool_forward returning [%p] %d m=%d,%d",
250 rfd, rc, p->more_l, p->more_r);
253 if (p->more_l && p->more_r)
254 cmp = (*info->cmp)(p->buf_l, p->buf_r);
259 if ( (cmp<0) && (p->more_l) )
261 memcpy (buf, p->buf_l, info->key_size);
262 *term_index = p->term_index_l;
263 logf (LOG_DEBUG, "rsbool_forward returning L (cmp=%d)",cmp);
265 } else if ( (cmp>0) && (p->more_r) )
267 memcpy (buf, p->buf_r, info->key_size);
268 *term_index = p->term_index_r + info->term_index_s;
269 logf (LOG_DEBUG, "rsbool_forward returning R (cmp=%d)",cmp);
272 /* return ( p->more_l || p->more_r); */
276 static int r_count (RSET ct)
297 static int r_read_and (RSFD rfd, void *buf, int *term_index)
299 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
300 struct rset_bool_info *info = p->info;
302 while (p->more_l || p->more_r)
306 if (p->more_l && p->more_r)
307 cmp = (*info->cmp)(p->buf_l, p->buf_r);
312 logf (LOG_DEBUG, "r_read_and [%p] looping: m=%d/%d c=%d t=%d",
313 rfd, p->more_l, p->more_r, cmp, p->tail);
314 key_logdump(LOG_DEBUG,p->buf_l);
315 key_logdump(LOG_DEBUG,p->buf_r);
318 memcpy (buf, p->buf_l, info->key_size);
319 *term_index = p->term_index_l;
320 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
326 memcpy (buf, p->buf_r, info->key_size);
327 *term_index = p->term_index_r + info->term_index_s;
328 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
331 logf (LOG_DEBUG, "r_read_and [%p] returning R m=%d/%d c=%d",
332 rfd, p->more_l, p->more_r, cmp);
333 key_logdump(LOG_DEBUG,buf);
338 memcpy (buf, p->buf_l, info->key_size);
339 *term_index = p->term_index_l;
340 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
343 logf (LOG_DEBUG, "r_read_and [%p] returning L m=%d/%d c=%d",
344 rfd, p->more_l, p->more_r, cmp);
345 key_logdump(LOG_DEBUG,buf);
348 else if (cmp > 1) /* cmp == 2 */
352 memcpy (buf, p->buf_r, info->key_size);
353 *term_index = p->term_index_r + info->term_index_s;
355 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
359 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
361 logf (LOG_DEBUG, "r_read_and returning C m=%d/%d c=%d",
362 p->more_l, p->more_r, cmp);
363 key_logdump(LOG_DEBUG,buf);
370 memcpy (buf, p->buf_r, info->key_size);
371 *term_index = p->term_index_r + info->term_index_s;
372 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
374 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
376 logf (LOG_DEBUG, "r_read_and [%p] returning R tail m=%d/%d c=%d",
377 rfd, p->more_l, p->more_r, cmp);
378 key_logdump(LOG_DEBUG,buf);
382 logf (LOG_DEBUG, "r_read_and [%p] about to forward R m=%d/%d c=%d",
383 rfd, p->more_l, p->more_r, cmp);
384 if (p->more_r && p->more_l)
385 p->more_r = rset_forward(
386 info->rset_r, p->rfd_r,
387 p->buf_r, &p->term_index_r,
388 (info->cmp), p->buf_l);
390 return 0; /* no point in reading further */
397 memcpy (buf, p->buf_l, info->key_size);
398 *term_index = p->term_index_l;
399 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
403 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
405 logf (LOG_DEBUG, "r_read_and [%p] returning R tail m=%d/%d c=%d",
406 rfd, p->more_l, p->more_r, cmp);
407 key_logdump(LOG_DEBUG,buf);
413 memcpy (buf, p->buf_l, info->key_size);
414 *term_index = p->term_index_l;
415 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
417 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
419 logf (LOG_DEBUG, "r_read_and [%p] returning L tail m=%d/%d c=%d",
420 rfd, p->more_l, p->more_r, cmp);
421 key_logdump(LOG_DEBUG,buf);
426 logf (LOG_DEBUG, "r_read_and [%p] about to forward L m=%d/%d c=%d",
427 rfd, p->more_l, p->more_r, cmp);
428 if (p->more_r && p->more_l)
429 p->more_l = rset_forward(
430 /* p->more_l = rset_default_forward( */
431 info->rset_l, p->rfd_l,
432 p->buf_l, &p->term_index_l,
433 (info->cmp), p->buf_r);
435 return 0; /* no point in reading further */
440 logf (LOG_DEBUG, "r_read_and [%p] reached its end",rfd);
444 static int r_read_or (RSFD rfd, void *buf, int *term_index)
446 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
447 struct rset_bool_info *info = p->info;
449 while (p->more_l || p->more_r)
453 if (p->more_l && p->more_r)
454 cmp = (*info->cmp)(p->buf_l, p->buf_r);
461 memcpy (buf, p->buf_l, info->key_size);
462 *term_index = p->term_index_l;
463 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
465 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
467 logf (LOG_DEBUG, "r_read_or returning A m=%d/%d c=%d",
468 p->more_l, p->more_r, cmp);
469 key_logdump(LOG_DEBUG,buf);
474 memcpy (buf, p->buf_r, info->key_size);
475 *term_index = p->term_index_r + info->term_index_s;
476 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
478 logf (LOG_DEBUG, "r_read_or returning B m=%d/%d c=%d",
479 p->more_l, p->more_r, cmp);
480 key_logdump(LOG_DEBUG,buf);
485 memcpy (buf, p->buf_l, info->key_size);
486 *term_index = p->term_index_l;
487 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
489 logf (LOG_DEBUG, "r_read_or returning C m=%d/%d c=%d",
490 p->more_l, p->more_r, cmp);
491 key_logdump(LOG_DEBUG,buf);
498 static int r_read_not (RSFD rfd, void *buf, int *term_index)
500 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
501 struct rset_bool_info *info = p->info;
503 while (p->more_l || p->more_r)
507 if (p->more_l && p->more_r)
508 cmp = (*info->cmp)(p->buf_l, p->buf_r);
515 memcpy (buf, p->buf_l, info->key_size);
516 *term_index = p->term_index_l;
517 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
523 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
526 p->more_r = rset_forward(
527 info->rset_r, p->rfd_r,
528 p->buf_r, &p->term_index_r,
529 (info->cmp), p->buf_l);
533 memcpy (buf, p->buf_l, info->key_size);
536 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
540 cmp = (*info->cmp)(p->buf_l, buf);
541 } while (cmp >= -1 && cmp <= 1);
544 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
548 cmp = (*info->cmp)(p->buf_r, buf);
549 } while (cmp >= -1 && cmp <= 1);
556 static int r_write (RSFD rfd, const void *buf)
558 logf (LOG_FATAL, "bool set type is read-only");