-/*
- * 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.
- *
- */
+/* This file is part of the Zebra server.
+ Copyright (C) 1994-2011 Index Data
+
+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 this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+*/
-#include <rstemp.h>
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <assert.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#ifdef WIN32
+#include <io.h>
+#endif
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <sys/types.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();
+#include <idzebra/util.h>
+#include <rset.h>
-static const rset_control control =
+static RSFD r_open(RSET ct, int flag);
+static void r_close(RSFD rfd);
+static void r_delete(RSET ct);
+static int r_read(RSFD rfd, void *buf, TERMID *term);
+static int r_write(RSFD rfd, const void *buf);
+static void r_pos(RSFD rfd, double *current, double *total);
+static void r_flush(RSFD rfd, int mk);
+static void r_reread(RSFD rfd);
+
+static const struct rset_control control =
{
- "Temporary set",
- 0,
- r_create,
+ "temp",
+ r_delete,
+ rset_get_one_term,
r_open,
r_close,
- r_delete,
- r_rewind,
- r_count,
+ 0, /* no forward */
+ r_pos,
r_read,
- r_write
+ r_write,
};
-const rset_control *rset_kind_temp = &control;
+struct rset_private {
+ int fd; /* file descriptor for temp file */
+ char *fname; /* name of temp file */
+ 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;
+};
+
+struct rfd_private {
+ void *buf;
+ size_t pos_cur; /* current position in set */
+ /* FIXME - term pos or what ?? */
+ zint cur; /* number of the current hit */
+};
-static struct rset_control *r_create(const struct rset_control *sel, void *parms)
-{}
+static int log_level = 0;
+static int log_level_initialized = 0;
-static int r_open(struct rset_control *ct, int wflag)
-{}
+RSET rset_create_temp(NMEM nmem, struct rset_key_control *kcontrol,
+ int scope, const char *temp_path, TERMID term)
+{
+ RSET rnew = rset_create_base(&control, nmem, kcontrol, scope, term,
+ 0, 0);
+ struct rset_private *info;
+ if (!log_level_initialized)
+ {
+ log_level = yaz_log_module_level("rstemp");
+ log_level_initialized = 1;
+ }
+ info = (struct rset_private *) nmem_malloc(rnew->nmem, sizeof(*info));
+ info->fd = -1;
+ info->fname = NULL;
+ info->buf_size = 4096;
+ info->buf_mem = (char *) nmem_malloc(rnew->nmem, info->buf_size);
+ info->pos_end = 0;
+ info->pos_buf = 0;
+ info->dirty = 0;
+ info->hits = 0;
+
+ if (!temp_path)
+ info->temp_path = NULL;
+ else
+ info->temp_path = nmem_strdup(rnew->nmem, temp_path);
+ rnew->priv = info;
+ return rnew;
+} /* rstemp_create */
+
+static void r_delete(RSET ct)
+{
+ struct rset_private *info = (struct rset_private*) ct->priv;
+
+ yaz_log(log_level, "r_delete: set size %ld", (long) info->pos_end);
+ if (info->fname)
+ {
+ yaz_log(log_level, "r_delete: unlink %s", info->fname);
+ unlink(info->fname);
+ }
+}
+
+static RSFD r_open(RSET ct, int flag)
+{
+ struct rset_private *info = (struct rset_private *) ct->priv;
+ RSFD rfd;
+ struct rfd_private *prfd;
+
+ 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)
+ {
+ yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: open failed %s", info->fname);
+ zebra_exit("r_open");
+ }
+ }
+ rfd = rfd_create_base(ct);
+ if (!rfd->priv)
+ {
+ prfd = (struct rfd_private *) nmem_malloc(ct->nmem, sizeof(*prfd));
+ rfd->priv = (void *)prfd;
+ prfd->buf = nmem_malloc(ct->nmem,ct->keycontrol->key_size);
+ }
+ else
+ prfd= rfd->priv;
+ r_flush(rfd, 0);
+ prfd->pos_cur = 0;
+ info->pos_buf = 0;
+ r_reread(rfd);
+ prfd->cur = 0;
+ 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_private *info = rfd->rset->priv;
-static void r_close(struct rset_control *ct)
-{}
+ if (!info->fname && mk)
+ {
+#if HAVE_MKSTEMP
+ char template[1024];
-static void r_delete(struct rset_control *ct)
-{}
+ *template = '\0';
-static void r_rewind(struct rset_control *ct)
-{}
+ if (info->temp_path)
+ sprintf(template, "%s/", info->temp_path);
+ strcat(template, "zrs_");
+#if HAVE_UNISTD_H
+ sprintf(template + strlen(template), "%ld_", (long) getpid());
+#endif
+ strcat(template, "XXXXXX");
-static int r_count(struct rset_control *ct)
-{}
+ info->fd = mkstemp(template);
+ if (info->fd == -1)
+ {
+ yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: mkstemp %s", template);
+ zebra_exit("r_flush");
+ }
+ info->fname = nmem_strdup(rfd->rset->nmem, template);
+#else
+ char *s = (char*) tempnam(info->temp_path, "zrs");
+ info->fname= nmem_strdup(rfd->rset->nmem, s);
-static int r_read()
-{}
+ yaz_log(log_level, "creating tempfile %s", info->fname);
+ info->fd = open(info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
+ if (info->fd == -1)
+ {
+ yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: open %s", info->fname);
+ zebra_exit("r_flush");
+ }
+#endif
+ }
+ if (info->fname && info->fd != -1 && info->dirty)
+ {
+ size_t count;
+ int r;
+
+ if (lseek(info->fd, info->pos_buf, SEEK_SET) == -1)
+ {
+ yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: lseek (1) %s", info->fname);
+ zebra_exit("r_flusxh");
+ }
+ 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)
+ yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: write %s", info->fname);
+ else
+ yaz_log(YLOG_FATAL, "rstemp: write of %ld but got %ld",
+ (long) count, (long) r);
+ zebra_exit("r_flush");
+ }
+ info->dirty = 0;
+ }
+}
+
+static void r_close(RSFD rfd)
+{
+ struct rset_private *info = (struct rset_private *)rfd->rset->priv;
+ if (rfd_is_last(rfd))
+ {
+ r_flush(rfd, 0);
+ if (info->fname && info->fd != -1)
+ {
+ close(info->fd);
+ info->fd = -1;
+ }
+ }
+}
+
+
+/* r_reread:
+ read from file to window if file is assocated with set -
+ indicated by fname
+ */
+static void r_reread(RSFD rfd)
+{
+ struct rfd_private *mrfd = (struct rfd_private*) rfd->priv;
+ struct rset_private *info = (struct rset_private *)rfd->rset->priv;
+
+ if (info->fname)
+ {
+ size_t count;
+ int r;
+
+ info->pos_border = mrfd->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)
+ {
+ yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: lseek (2) %s fd=%d", info->fname, info->fd);
+ zebra_exit("r_reread");
+ }
+ if ((r = read(info->fd, info->buf_mem, count)) < (int) count)
+ {
+ if (r == -1)
+ yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: read %s", info->fname);
+ else
+ yaz_log(YLOG_FATAL, "read of %ld but got %ld",
+ (long) count, (long) r);
+ zebra_exit("r_reread");
+ }
+ }
+ }
+ else
+ info->pos_border = info->pos_end;
+}
+
+static int r_read(RSFD rfd, void *buf, TERMID *term)
+{
+ struct rfd_private *mrfd = (struct rfd_private*) rfd->priv;
+ struct rset_private *info = (struct rset_private *)rfd->rset->priv;
+
+ size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->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),
+ rfd->rset->keycontrol->key_size);
+ if (term)
+ *term = rfd->rset->term;
+ /* FIXME - should we store and return terms ?? */
+ mrfd->pos_cur = nc;
+ mrfd->cur++;
+ return 1;
+}
+
+static int r_write(RSFD rfd, const void *buf)
+{
+ struct rfd_private *mrfd = (struct rfd_private*) rfd->priv;
+ struct rset_private *info = (struct rset_private *)rfd->rset->priv;
+
+ size_t nc = mrfd->pos_cur + rfd->rset->keycontrol->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,
+ rfd->rset->keycontrol->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 rfd_private *mrfd = (struct rfd_private*) rfd->priv;
+ struct rset_private *info = (struct rset_private *)rfd->rset->priv;
+
+ *current = (double) mrfd->cur;
+ *total = (double) info->hits;
+}
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * c-file-style: "Stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
-static int r_write()
-{}
projects / idzebra-moved-to-github.git / blobdiff