-/*
- * Copyright (C) 1994, Index Data I/S
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: rstemp.c,v $
- * Revision 1.2 1995-09-04 09:10:56 adam
- * Minor changes.
- *
- * Revision 1.1 1994/11/04 13:21:30 quinn
- * Working.
- *
- */
+/* $Id: rstemp.c,v 1.42 2004-08-06 12:55:03 adam Exp $
+ Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003
+ 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 <fcntl.h>
+#include <assert.h>
+#ifdef WIN32
+#include <io.h>
+#else
+#include <unistd.h>
+#endif
+#include <string.h>
+#include <sys/types.h>
+#include <stdio.h>
+#include <zebrautl.h>
#include <rstemp.h>
-static struct rset_control *r_create(const struct rset_control *sel,
- void *parms);
-static int r_open(struct rset_control *ct, int wflag);
-static void r_close(struct rset_control *ct);
-static void r_delete(struct rset_control *ct);
-static void r_rewind(struct rset_control *ct);
-static int r_count(struct rset_control *ct);
-static int r_read();
-static int r_write();
-
-static const rset_control control =
+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_count (RSET ct);*/
+static int r_read (RSFD rfd, void *buf, int *term_index);
+static int r_write (RSFD rfd, const void *buf);
+static void r_pos (RSFD rfd, double *current, double *total);
+
+static const struct rset_control control =
{
- "Temporary set",
- 0,
+ "temp",
r_create,
r_open,
r_close,
r_delete,
r_rewind,
- r_count,
+ rset_default_forward,
+ r_pos,
r_read,
- r_write
+ r_write,
+};
+
+const struct rset_control *rset_kind_temp = &control;
+
+struct rset_temp_info {
+ int fd;
+ char *fname;
+ size_t key_size; /* key size */
+ char *buf_mem; /* window buffer */
+ size_t buf_size; /* size of window */
+ size_t pos_end; /* last position in set */
+ size_t pos_buf; /* position of first byte in window */
+ size_t pos_border; /* position of last byte+1 in window */
+ int dirty; /* window is dirty */
+ zint hits; /* no of hits */
+ char *temp_path;
+ int (*cmp)(const void *p1, const void *p2);
+ struct rset_temp_rfd *rfd_list;
+};
+
+struct rset_temp_rfd {
+ struct rset_temp_info *info;
+ struct rset_temp_rfd *next;
+ zint *countp;
+ void *buf;
+ size_t pos_cur; /* current position in set */
+ zint cur; /* number of the current hit */
};
-const rset_control *rset_kind_temp = &control;
+static void *r_create(RSET ct, const struct rset_control *sel, void *parms)
+{
+ rset_temp_parms *temp_parms = (rset_temp_parms *) parms;
+ struct rset_temp_info *info;
+
+ info = (struct rset_temp_info *) xmalloc (sizeof(struct rset_temp_info));
+ info->fd = -1;
+ info->fname = NULL;
+ info->key_size = temp_parms->key_size;
+ info->buf_size = 4096;
+ info->buf_mem = (char *) xmalloc (info->buf_size);
+ info->pos_end = 0;
+ info->pos_buf = 0;
+ info->dirty = 0;
+ info->hits = 0;
+ info->cmp = temp_parms->cmp;
+ info->rfd_list = NULL;
+
+ if (!temp_parms->temp_path)
+ info->temp_path = NULL;
+ else
+ {
+ info->temp_path = (char *) xmalloc (strlen(temp_parms->temp_path)+1);
+ strcpy (info->temp_path, temp_parms->temp_path);
+ }
+ ct->no_rset_terms = 1;
+ ct->rset_terms = (RSET_TERM *) xmalloc (sizeof(*ct->rset_terms));
+ ct->rset_terms[0] = temp_parms->rset_term;
-static struct rset_control *r_create(const struct rset_control *sel, void *parms)
-{}
+ return info;
+}
+
+static RSFD r_open (RSET ct, int flag)
+{
+ struct rset_temp_info *info = (struct rset_temp_info *) ct->buf;
+ struct rset_temp_rfd *rfd;
-static int r_open(struct rset_control *ct, int wflag)
-{}
+ if (info->fd == -1 && info->fname)
+ {
+ if (flag & RSETF_WRITE)
+ info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
+ else
+ info->fd = open (info->fname, O_BINARY|O_RDONLY);
+ if (info->fd == -1)
+ {
+ logf (LOG_FATAL|LOG_ERRNO, "open %s", info->fname);
+ exit (1);
+ }
+ }
+ rfd = (struct rset_temp_rfd *) xmalloc (sizeof(*rfd));
+ rfd->next = info->rfd_list;
+ info->rfd_list = rfd;
+ rfd->info = info;
+ r_rewind (rfd);
-static void r_close(struct rset_control *ct)
-{}
+ rfd->countp = &ct->rset_terms[0]->count;
+ *rfd->countp = 0;
+ rfd->buf = xmalloc (info->key_size);
-static void r_delete(struct rset_control *ct)
-{}
+ return rfd;
+}
+
+/* r_flush:
+ flush current window to file if file is assocated with set
+ */
+static void r_flush (RSFD rfd, int mk)
+{
+ struct rset_temp_info *info = ((struct rset_temp_rfd*) rfd)->info;
-static void r_rewind(struct rset_control *ct)
-{}
+ if (!info->fname && mk)
+ {
+#if HAVE_MKSTEMP
+ char template[1024];
+
+ if (info->temp_path)
+ sprintf (template, "%s/zrsXXXXXX", info->temp_path);
+ else
+ sprintf (template, "zrsXXXXXX");
+
+ info->fd = mkstemp (template);
+
+ if (info->fd == -1)
+ {
+ logf (LOG_FATAL|LOG_ERRNO, "mkstemp %s", template);
+ exit (1);
+ }
+ info->fname = (char *) xmalloc (strlen(template)+1);
+ strcpy (info->fname, template);
+#else
+ char *s = (char*) tempnam (info->temp_path, "zrs");
+ info->fname = (char *) xmalloc (strlen(s)+1);
+ strcpy (info->fname, s);
+
+ logf (LOG_DEBUG, "creating tempfile %s", info->fname);
+ info->fd = open (info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
+ if (info->fd == -1)
+ {
+ logf (LOG_FATAL|LOG_ERRNO, "open %s", info->fname);
+ exit (1);
+ }
+#endif
+ }
+ if (info->fname && info->fd != -1 && info->dirty)
+ {
+ size_t count;
+ int r;
+
+ if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
+ {
+ logf (LOG_FATAL|LOG_ERRNO, "lseek %s", info->fname);
+ exit (1);
+ }
+ count = info->buf_size;
+ if (count > info->pos_end - info->pos_buf)
+ count = info->pos_end - info->pos_buf;
+ if ((r = write (info->fd, info->buf_mem, count)) < (int) count)
+ {
+ if (r == -1)
+ logf (LOG_FATAL|LOG_ERRNO, "read %s", info->fname);
+ else
+ logf (LOG_FATAL, "write of %ld but got %ld",
+ (long) count, (long) r);
+ exit (1);
+ }
+ info->dirty = 0;
+ }
+}
+
+static void r_close (RSFD rfd)
+{
+ struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info;
+ struct rset_temp_rfd **rfdp;
-static int r_count(struct rset_control *ct)
-{}
+ for (rfdp = &info->rfd_list; *rfdp; rfdp = &(*rfdp)->next)
+ if (*rfdp == rfd)
+ {
+ r_flush (*rfdp, 0);
+ xfree ((*rfdp)->buf);
-static int r_read()
-{}
+ *rfdp = (*rfdp)->next;
+ xfree (rfd);
-static int r_write()
-{}
+ if (!info->rfd_list && info->fname && info->fd != -1)
+ {
+ close (info->fd);
+ info->fd = -1;
+ }
+ return;
+ }
+ logf (LOG_FATAL, "r_close but no rfd match!");
+ assert (0);
+}
+
+static void r_delete (RSET ct)
+{
+ struct rset_temp_info *info = (struct rset_temp_info*) ct->buf;
+
+ if (info->fname)
+ unlink (info->fname);
+ xfree (info->buf_mem);
+ logf (LOG_DEBUG, "r_delete: set size %ld", (long) info->pos_end);
+ if (info->fname)
+ {
+ logf (LOG_DEBUG, "r_delete: unlink %s", info->fname);
+ unlink (info->fname);
+ xfree (info->fname);
+ }
+ if (info->temp_path)
+ xfree (info->temp_path);
+ rset_term_destroy (ct->rset_terms[0]);
+ xfree (ct->rset_terms);
+ xfree (info);
+}
+
+/* r_reread:
+ read from file to window if file is assocated with set -
+ indicated by fname
+ */
+static void r_reread (RSFD rfd)
+{
+ struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info;
+
+ if (info->fname)
+ {
+ size_t count;
+ int r;
+
+ info->pos_border = ((struct rset_temp_rfd *)rfd)->pos_cur +
+ info->buf_size;
+ if (info->pos_border > info->pos_end)
+ info->pos_border = info->pos_end;
+ count = info->pos_border - info->pos_buf;
+ if (count > 0)
+ {
+ if (lseek (info->fd, info->pos_buf, SEEK_SET) == -1)
+ {
+ logf (LOG_FATAL|LOG_ERRNO, "lseek %s", info->fname);
+ exit (1);
+ }
+ if ((r = read (info->fd, info->buf_mem, count)) < (int) count)
+ {
+ if (r == -1)
+ logf (LOG_FATAL|LOG_ERRNO, "read %s", info->fname);
+ else
+ logf (LOG_FATAL, "read of %ld but got %ld",
+ (long) count, (long) r);
+ exit (1);
+ }
+ }
+ }
+ else
+ info->pos_border = info->pos_end;
+}
+
+static void r_rewind (RSFD rfd)
+{
+ struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info;
+
+ r_flush (rfd, 0);
+ ((struct rset_temp_rfd *)rfd)->pos_cur = 0;
+ info->pos_buf = 0;
+ r_reread (rfd);
+ ((struct rset_temp_rfd *)rfd)->cur=0;
+}
+
+/*
+static int r_count (RSET ct)
+{
+ struct rset_temp_info *info = (struct rset_temp_info *) ct->buf;
+
+ return info->pos_end / info->key_size;
+}
+*/
+static int r_read (RSFD rfd, void *buf, int *term_index)
+{
+ struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd;
+ struct rset_temp_info *info = mrfd->info;
+
+ size_t nc = mrfd->pos_cur + info->key_size;
+
+ if (mrfd->pos_cur < info->pos_buf || nc > info->pos_border)
+ {
+ if (nc > info->pos_end)
+ return 0;
+ r_flush (rfd, 0);
+ info->pos_buf = mrfd->pos_cur;
+ r_reread (rfd);
+ }
+ memcpy (buf, info->buf_mem + (mrfd->pos_cur - info->pos_buf),
+ info->key_size);
+ mrfd->pos_cur = nc;
+ *term_index = 0;
+
+ if (*mrfd->countp == 0 || (*info->cmp)(buf, mrfd->buf) > 1)
+ {
+ memcpy (mrfd->buf, buf, mrfd->info->key_size);
+ (*mrfd->countp)++;
+ }
+ mrfd->cur++;
+ return 1;
+}
+
+static int r_write (RSFD rfd, const void *buf)
+{
+ struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd;
+ struct rset_temp_info *info = mrfd->info;
+
+ size_t nc = mrfd->pos_cur + info->key_size;
+
+ if (nc > info->pos_buf + info->buf_size)
+ {
+ r_flush (rfd, 1);
+ info->pos_buf = mrfd->pos_cur;
+ if (info->pos_buf < info->pos_end)
+ r_reread (rfd);
+ }
+ info->dirty = 1;
+ memcpy (info->buf_mem + (mrfd->pos_cur - info->pos_buf), buf,
+ info->key_size);
+ mrfd->pos_cur = nc;
+ if (nc > info->pos_end)
+ info->pos_border = info->pos_end = nc;
+ info->hits++;
+ return 1;
+}
+
+static void r_pos (RSFD rfd, double *current, double *total)
+{
+ struct rset_temp_rfd *mrfd = (struct rset_temp_rfd*) rfd;
+ *current=(double) mrfd->cur;
+ *total=(double) mrfd->info->hits;
+}
projects / idzebra-moved-to-github.git / blobdiff