+++ /dev/null
-/* $Id: rsm_or.c,v 1.20 2004-08-20 14:44:46 heikki Exp $
- Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002
- Index Data Aps
-
-This file is part of the Zebra server.
-
-Zebra is free software; you can redistribute it and/or modify it under
-the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
-version.
-
-Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY; without even the implied warranty of MERCHANTABILITY or
-FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-for more details.
-
-You should have received a copy of the GNU General Public License
-along with Zebra; see the file LICENSE.zebra. If not, write to the
-Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.
-*/
-
-
-
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <zebrautl.h>
-#include <isamc.h>
-#include <rsm_or.h>
-
-static void *r_create(RSET ct, const struct rset_control *sel, void *parms);
-static RSFD r_open (RSET ct, int flag);
-static void r_close (RSFD rfd);
-static void r_delete (RSET ct);
-static void r_rewind (RSFD rfd);
-static int r_read (RSFD rfd, void *buf);
-static int r_write (RSFD rfd, const void *buf);
-
-static const struct rset_control control =
-{
- "m-or (old)",
- r_create,
- r_open,
- r_close,
- r_delete,
- r_rewind,
- rset_default_forward, /* FIXME */
- rset_default_pos, /* FIXME */
- r_read,
- r_write,
-};
-
-const struct rset_control *rset_kind_m_or = &control;
-
-struct rset_mor_info {
- int key_size;
- int no_rec;
- int (*cmp)(const void *p1, const void *p2);
- ISAMC isc;
- ISAMC_P *isam_positions;
-
- int no_isam_positions;
- int no_save_positions;
- struct rset_mor_rfd *rfd_list;
-};
-
-struct trunc_info {
- int *ptr;
- int *indx;
- char **heap;
- int heapnum;
- int (*cmp)(const void *p1, const void *p2);
- int keysize;
- char *swapbuf;
- char *tmpbuf;
- char *buf;
-};
-
-struct rset_mor_rfd {
- int flag;
- int position;
- int position_max;
- ISAMC_PP *ispt;
- struct rset_mor_rfd *next;
- struct rset_mor_info *info;
- struct trunc_info *ti;
- char *pbuf;
-};
-
-static void heap_swap (struct trunc_info *ti, int i1, int i2)
-{
- int swap;
-
- swap = ti->ptr[i1];
- ti->ptr[i1] = ti->ptr[i2];
- ti->ptr[i2] = swap;
-}
-
-static void heap_delete (struct trunc_info *ti)
-{
- int cur = 1, child = 2;
-
- heap_swap (ti, 1, ti->heapnum--);
- while (child <= ti->heapnum) {
- if (child < ti->heapnum &&
- (*ti->cmp)(ti->heap[ti->ptr[child]],
- ti->heap[ti->ptr[1+child]]) > 0)
- child++;
- if ((*ti->cmp)(ti->heap[ti->ptr[cur]],
- ti->heap[ti->ptr[child]]) > 0)
- {
- heap_swap (ti, cur, child);
- cur = child;
- child = 2*cur;
- }
- else
- break;
- }
-}
-
-static void heap_insert (struct trunc_info *ti, const char *buf, int indx)
-{
- int cur, parent;
-
- cur = ++(ti->heapnum);
- memcpy (ti->heap[ti->ptr[cur]], buf, ti->keysize);
- ti->indx[ti->ptr[cur]] = indx;
- parent = cur/2;
- while (parent && (*ti->cmp)(ti->heap[ti->ptr[parent]],
- ti->heap[ti->ptr[cur]]) > 0)
- {
- heap_swap (ti, cur, parent);
- cur = parent;
- parent = cur/2;
- }
-}
-
-static
-struct trunc_info *heap_init (int size, int key_size,
- int (*cmp)(const void *p1, const void *p2))
-{
- struct trunc_info *ti = (struct trunc_info *) xmalloc (sizeof(*ti));
- int i;
-
- ++size;
- ti->heapnum = 0;
- ti->keysize = key_size;
- ti->cmp = cmp;
- ti->indx = (int *) xmalloc (size * sizeof(*ti->indx));
- ti->heap = (char **) xmalloc (size * sizeof(*ti->heap));
- ti->ptr = (int *) xmalloc (size * sizeof(*ti->ptr));
- ti->swapbuf = (char *) xmalloc (ti->keysize);
- ti->tmpbuf = (char *) xmalloc (ti->keysize);
- ti->buf = (char *) xmalloc (size * ti->keysize);
- for (i = size; --i >= 0; )
- {
- ti->ptr[i] = i;
- ti->heap[i] = ti->buf + ti->keysize * i;
- }
- return ti;
-}
-
-static void heap_close (struct trunc_info *ti)
-{
- xfree (ti->buf);
- xfree (ti->ptr);
- xfree (ti->indx);
- xfree (ti->heap);
- xfree (ti->swapbuf);
- xfree (ti->tmpbuf);
- xfree (ti);
-}
-
-static void *r_create (RSET ct, const struct rset_control *sel, void *parms)
-{
- rset_m_or_parms *r_parms = (rset_m_or_parms *) parms;
- struct rset_mor_info *info;
-
- ct->flags |= RSET_FLAG_VOLATILE;
- info = (struct rset_mor_info *) xmalloc (sizeof(*info));
- info->key_size = r_parms->key_size;
- assert (info->key_size > 1);
- info->cmp = r_parms->cmp;
-
- info->no_save_positions = r_parms->no_save_positions;
-
- info->isc = r_parms->isc;
- info->no_isam_positions = r_parms->no_isam_positions;
- info->isam_positions = (ISAMC_P *)
- xmalloc (sizeof(*info->isam_positions) * info->no_isam_positions);
- memcpy (info->isam_positions, r_parms->isam_positions,
- sizeof(*info->isam_positions) * info->no_isam_positions);
- info->rfd_list = NULL;
-
- ct->no_rset_terms = 1;
- ct->rset_terms = (RSET_TERM *) xmalloc (sizeof(*ct->rset_terms));
- ct->rset_terms[0] = r_parms->rset_term;
- return info;
-}
-
-static RSFD r_open (RSET ct, int flag)
-{
- struct rset_mor_rfd *rfd;
- struct rset_mor_info *info = (struct rset_mor_info *) ct->buf;
- int i;
-
- if (flag & RSETF_WRITE)
- {
- logf (LOG_FATAL, "m_or set type is read-only");
- return NULL;
- }
- rfd = (struct rset_mor_rfd *) xmalloc (sizeof(*rfd));
- rfd->flag = flag;
- rfd->next = info->rfd_list;
- rfd->info = info;
- info->rfd_list = rfd;
-
- rfd->ispt = (ISAMC_PP *)
- xmalloc (sizeof(*rfd->ispt) * info->no_isam_positions);
-
- rfd->ti = heap_init (info->no_isam_positions, info->key_size, info->cmp);
-
- ct->rset_terms[0]->nn = 0;
- for (i = 0; i<info->no_isam_positions; i++)
- {
- rfd->ispt[i] = isc_pp_open (info->isc, info->isam_positions[i]);
-
- ct->rset_terms[0]->nn += isc_pp_num (rfd->ispt[i]);
-
- if (isc_pp_read (rfd->ispt[i], rfd->ti->tmpbuf))
- heap_insert (rfd->ti, rfd->ti->tmpbuf, i);
- else
- {
- isc_pp_close (rfd->ispt[i]);
- rfd->ispt[i] = NULL;
- }
- }
- rfd->position = info->no_save_positions;
- rfd->pbuf = 0;
- r_rewind (rfd);
- return rfd;
-}
-
-static void r_close (RSFD rfd)
-{
- struct rset_mor_info *info = ((struct rset_mor_rfd*)rfd)->info;
- struct rset_mor_rfd **rfdp;
- int i;
-
- for (rfdp = &info->rfd_list; *rfdp; rfdp = &(*rfdp)->next)
- if (*rfdp == rfd)
- {
- *rfdp = (*rfdp)->next;
-
- heap_close (((struct rset_mor_rfd *) rfd)->ti);
- for (i = 0; i<info->no_isam_positions; i++)
- if (((struct rset_mor_rfd *) rfd)->ispt[i])
- isc_pp_close (((struct rset_mor_rfd *) rfd)->ispt[i]);
- xfree (((struct rset_mor_rfd *)rfd)->ispt);
- xfree (((struct rset_mor_rfd *)rfd)->pbuf);
- xfree (rfd);
- return;
- }
- logf (LOG_FATAL, "r_close but no rfd match!");
- assert (0);
-}
-
-static void r_delete (RSET ct)
-{
- struct rset_mor_info *info = (struct rset_mor_info *) ct->buf;
- assert (info->rfd_list == NULL);
- xfree (info->isam_positions);
- xfree (info);
-}
-
-static void r_rewind (RSFD rfd)
-{
-}
-
-
-static int r_read (RSFD rfd, void *buf)
-{
- struct rset_mor_rfd *mrfd = (struct rset_mor_rfd *) rfd;
- struct trunc_info *ti = mrfd->ti;
- int n = ti->indx[ti->ptr[1]];
-
- if (!ti->heapnum)
- return 0;
- memcpy (buf, ti->heap[ti->ptr[1]], ti->keysize);
- if (((struct rset_mor_rfd *) rfd)->position)
- {
- if (isc_pp_read (((struct rset_mor_rfd *) rfd)->ispt[n], ti->tmpbuf))
- {
- heap_delete (ti);
- if ((*ti->cmp)(ti->tmpbuf, ti->heap[ti->ptr[1]]) > 1)
- ((struct rset_mor_rfd *) rfd)->position--;
- heap_insert (ti, ti->tmpbuf, n);
- }
- else
- heap_delete (ti);
- rfd->pbuf = xmalloc (info->key_size);
- if (mrfd->countp && (
- *mrfd->countp == 0 || (*ti->cmp)(buf, mrfd->pbuf) > 1))
- {
- memcpy (mrfd->pbuf, buf, ti->keysize);
- (*mrfd->countp)++;
- }
- return 1;
- }
- while (1)
- {
- if (!isc_pp_read (((struct rset_mor_rfd *) rfd)->ispt[n], ti->tmpbuf))
- {
- heap_delete (ti);
- break;
- }
- if ((*ti->cmp)(ti->tmpbuf, ti->heap[ti->ptr[1]]) > 1)
- {
- heap_delete (ti);
- heap_insert (ti, ti->tmpbuf, n);
- break;
- }
- }
- if (mrfd->countp && (
- *mrfd->countp == 0 || (*ti->cmp)(buf, mrfd->pbuf) > 1))
- {
- memcpy (mrfd->pbuf, buf, ti->keysize);
- (*mrfd->countp)++;
- }
- return 1;
-}
-
-static int r_write (RSFD rfd, const void *buf)
-{
- logf (LOG_FATAL, "mor set type is read-only");
- return -1;
-}
projects / idzebra-moved-to-github.git / blobdiff