1 /* $Id: rsbool.c,v 1.24 2004-01-30 11:43:41 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 rfd->next = info->rfd_list;
164 info->rfd_list = rfd;
167 rfd->buf_l = xmalloc (info->key_size);
168 rfd->buf_r = xmalloc (info->key_size);
169 rfd->rfd_l = rset_open (info->rset_l, RSETF_READ);
170 rfd->rfd_r = rset_open (info->rset_r, RSETF_READ);
171 rfd->more_l = rset_read (info->rset_l, rfd->rfd_l, rfd->buf_l,
173 rfd->more_r = rset_read (info->rset_r, rfd->rfd_r, rfd->buf_r,
179 static void r_close (RSFD rfd)
181 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
182 struct rset_bool_rfd **rfdp;
184 for (rfdp = &info->rfd_list; *rfdp; rfdp = &(*rfdp)->next)
187 xfree ((*rfdp)->buf_l);
188 xfree ((*rfdp)->buf_r);
189 rset_close (info->rset_l, (*rfdp)->rfd_l);
190 rset_close (info->rset_r, (*rfdp)->rfd_r);
191 *rfdp = (*rfdp)->next;
195 logf (LOG_FATAL, "r_close but no rfd match!");
199 static void r_delete (RSET ct)
201 struct rset_bool_info *info = (struct rset_bool_info *) ct->buf;
203 assert (info->rfd_list == NULL);
204 xfree (ct->rset_terms);
205 rset_delete (info->rset_l);
206 rset_delete (info->rset_r);
210 static void r_rewind (RSFD rfd)
212 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
213 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
215 logf (LOG_DEBUG, "rsbool_rewind");
216 rset_rewind (info->rset_l, p->rfd_l);
217 rset_rewind (info->rset_r, p->rfd_r);
218 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l, &p->term_index_l);
219 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r, &p->term_index_r);
222 static int r_forward(RSET ct, RSFD rfd, void *buf, int *term_index,
223 int (*cmpfunc)(const void *p1, const void *p2),
224 const void *untilbuf)
226 struct rset_bool_info *info = ((struct rset_bool_rfd*)rfd)->info;
227 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
230 logf (LOG_DEBUG, "rsbool_forward '%s' (ct=%p rfd=%p m=%d,%d)",
231 ct->control->desc, ct, rfd, p->more_l, p->more_r);
233 p->more_l = rset_forward(info->rset_l, p->rfd_l, p->buf_l,
234 &p->term_index_l, info->cmp, untilbuf);
236 p->more_r = rset_forward(info->rset_r, p->rfd_r, p->buf_r,
237 &p->term_index_r, info->cmp, untilbuf);
238 if (p->more_l && p->more_r)
239 cmp = (*info->cmp)(p->buf_l, p->buf_r);
244 if ( (cmp<0) && (p->more_l) )
246 memcpy (buf, p->buf_l, info->key_size);
247 *term_index = p->term_index_l;
248 } else if ( (cmp>0) && (p->more_r) )
250 memcpy (buf, p->buf_r, info->key_size);
251 *term_index = p->term_index_r + info->term_index_s;
253 return ( p->more_l || p->more_r);
256 static int r_count (RSET ct)
277 static int r_read_and (RSFD rfd, void *buf, int *term_index)
279 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
280 struct rset_bool_info *info = p->info;
282 while (p->more_l || p->more_r)
286 if (p->more_l && p->more_r)
287 cmp = (*info->cmp)(p->buf_l, p->buf_r);
292 logf (LOG_DEBUG, "r_read_and looping: m=%d/%d c=%d t=%d",
293 p->more_l, p->more_r, cmp, p->tail);
294 key_logdump(LOG_DEBUG,p->buf_l);
295 key_logdump(LOG_DEBUG,p->buf_r);
298 memcpy (buf, p->buf_l, info->key_size);
299 *term_index = p->term_index_l;
300 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
306 memcpy (buf, p->buf_r, info->key_size);
307 *term_index = p->term_index_r + info->term_index_s;
308 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
311 logf (LOG_DEBUG, "r_read_and returning A m=%d/%d c=%d",
312 p->more_l, p->more_r, cmp);
313 key_logdump(LOG_DEBUG,buf);
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,
323 logf (LOG_DEBUG, "r_read_and returning B m=%d/%d c=%d",
324 p->more_l, p->more_r, cmp);
325 key_logdump(LOG_DEBUG,buf);
332 memcpy (buf, p->buf_r, info->key_size);
333 *term_index = p->term_index_r + info->term_index_s;
335 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
339 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
341 logf (LOG_DEBUG, "r_read_and returning C m=%d/%d c=%d",
342 p->more_l, p->more_r, cmp);
343 key_logdump(LOG_DEBUG,buf);
350 logf (LOG_DEBUG, "r_read_and returning R tail m=%d/%d c=%d",
351 p->more_l, p->more_r, cmp);
352 memcpy (buf, p->buf_r, info->key_size);
353 *term_index = p->term_index_r + info->term_index_s;
354 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
356 if (!p->more_r || (*info->cmp)(p->buf_r, buf) > 1)
358 logf (LOG_DEBUG, "r_read_and returning D m=%d/%d c=%d",
359 p->more_l, p->more_r, cmp);
360 key_logdump(LOG_DEBUG,buf);
364 logf (LOG_DEBUG, "r_read_and about to forward R m=%d/%d c=%d",
365 p->more_l, p->more_r, cmp);
366 if (p->more_r && p->more_l)
367 p->more_r = rset_forward(
368 info->rset_r, p->rfd_r,
369 p->buf_r, &p->term_index_r,
370 (info->cmp), p->buf_l);
372 return 0; /* no point in reading further */
379 memcpy (buf, p->buf_l, info->key_size);
380 *term_index = p->term_index_l;
381 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
385 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
387 logf (LOG_DEBUG, "r_read_and returning E m=%d/%d c=%d",
388 p->more_l, p->more_r, cmp);
389 key_logdump(LOG_DEBUG,buf);
395 logf (LOG_DEBUG, "r_read_and returning L tail m=%d/%d c=%d",
396 p->more_l, p->more_r, cmp);
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,
401 if (!p->more_l || (*info->cmp)(p->buf_l, buf) > 1)
403 logf (LOG_DEBUG, "r_read_and returning F m=%d/%d c=%d",
404 p->more_l, p->more_r, cmp);
405 key_logdump(LOG_DEBUG,buf);
410 logf (LOG_DEBUG, "r_read_and about to forward L m=%d/%d c=%d",
411 p->more_l, p->more_r, cmp);
412 if (p->more_r && p->more_l)
413 p->more_l = rset_forward(
414 /* p->more_l = rset_default_forward( */
415 info->rset_l, p->rfd_l,
416 p->buf_l, &p->term_index_l,
417 (info->cmp), p->buf_r);
419 return 0; /* no point in reading further */
427 static int r_read_or (RSFD rfd, void *buf, int *term_index)
429 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
430 struct rset_bool_info *info = p->info;
432 while (p->more_l || p->more_r)
436 if (p->more_l && p->more_r)
437 cmp = (*info->cmp)(p->buf_l, p->buf_r);
444 memcpy (buf, p->buf_l, info->key_size);
445 *term_index = p->term_index_l;
446 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
448 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
450 logf (LOG_DEBUG, "r_read_or returning A m=%d/%d c=%d",
451 p->more_l, p->more_r, cmp);
452 key_logdump(LOG_DEBUG,buf);
457 memcpy (buf, p->buf_r, info->key_size);
458 *term_index = p->term_index_r + info->term_index_s;
459 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
461 logf (LOG_DEBUG, "r_read_or returning B m=%d/%d c=%d",
462 p->more_l, p->more_r, cmp);
463 key_logdump(LOG_DEBUG,buf);
468 memcpy (buf, p->buf_l, info->key_size);
469 *term_index = p->term_index_l;
470 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
472 logf (LOG_DEBUG, "r_read_or returning C m=%d/%d c=%d",
473 p->more_l, p->more_r, cmp);
474 key_logdump(LOG_DEBUG,buf);
481 static int r_read_not (RSFD rfd, void *buf, int *term_index)
483 struct rset_bool_rfd *p = (struct rset_bool_rfd *) rfd;
484 struct rset_bool_info *info = p->info;
486 while (p->more_l || p->more_r)
490 if (p->more_l && p->more_r)
491 cmp = (*info->cmp)(p->buf_l, p->buf_r);
498 memcpy (buf, p->buf_l, info->key_size);
499 *term_index = p->term_index_l;
500 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
506 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
509 p->more_r = rset_forward(
510 info->rset_r, p->rfd_r,
511 p->buf_r, &p->term_index_r,
512 (info->cmp), p->buf_l);
516 memcpy (buf, p->buf_l, info->key_size);
519 p->more_l = rset_read (info->rset_l, p->rfd_l, p->buf_l,
523 cmp = (*info->cmp)(p->buf_l, buf);
524 } while (cmp >= -1 && cmp <= 1);
527 p->more_r = rset_read (info->rset_r, p->rfd_r, p->buf_r,
531 cmp = (*info->cmp)(p->buf_r, buf);
532 } while (cmp >= -1 && cmp <= 1);
539 static int r_write (RSFD rfd, const void *buf)
541 logf (LOG_FATAL, "bool set type is read-only");