/*
- * Copyright (C) 1994, Index Data I/S
+ * Copyright (C) 1994-1995, Index Data I/S
* All rights reserved.
* Sebastian Hammer, Adam Dickmeiss
*
* $Log: rstemp.c,v $
- * Revision 1.5 1995-09-05 16:36:59 adam
+ * Revision 1.9 1995-09-15 09:20:42 adam
+ * Bug fixes.
+ *
+ * Revision 1.8 1995/09/08 14:52:42 adam
+ * Work on relevance feedback.
+ *
+ * Revision 1.7 1995/09/07 13:58:44 adam
+ * New parameter: result-set file descriptor (RSFD) to support multiple
+ * positions within the same result-set.
+ * Boolean operators: and, or, not implemented.
+ *
+ * Revision 1.6 1995/09/06 16:11:56 adam
+ * More work on boolean sets.
+ *
+ * Revision 1.5 1995/09/05 16:36:59 adam
* Minor changes.
*
* Revision 1.4 1995/09/05 11:43:24 adam
#include <alexutil.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 (rset_control *ct, void *buf);
-static int r_write (rset_control *ct, const void *buf);
+static rset_control *r_create(const struct rset_control *sel, void *parms);
+static RSFD r_open (rset_control *ct, int wflag);
+static void r_close (RSFD rfd);
+static void r_delete (rset_control *ct);
+static void r_rewind (RSFD rfd);
+static int r_count (rset_control *ct);
+static int r_read (RSFD rfd, void *buf);
+static int r_write (RSFD rfd, const void *buf);
static const rset_control control =
{
const rset_control *rset_kind_temp = &control;
-struct rset_temp_private {
+struct rset_temp_info {
int fd;
char *fname;
- size_t key_size;
- char *buf_mem;
- size_t buf_size;
- size_t pos_end;
- size_t pos_cur;
- size_t pos_buf;
- size_t pos_border;
- int dirty;
+ 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_cur; /* current 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 */
+};
+
+struct rset_temp_rfd {
+ struct rset_temp_info *info;
+ struct rset_temp_rfd *next;
};
static struct rset_control *r_create(const struct rset_control *sel,
{
rset_control *newct;
rset_temp_parms *temp_parms = parms;
- struct rset_temp_private *info;
+ struct rset_temp_info *info;
- logf (LOG_DEBUG, "ritemp_create(%s)", sel->desc);
newct = xmalloc(sizeof(*newct));
memcpy(newct, sel, sizeof(*sel));
- newct->buf = xmalloc (sizeof(struct rset_temp_private));
+ newct->buf = xmalloc (sizeof(struct rset_temp_info));
info = newct->buf;
info->fd = -1;
return newct;
}
-static int r_open(struct rset_control *ct, int wflag)
+static RSFD r_open (struct rset_control *ct, int wflag)
{
- struct rset_temp_private *info = ct->buf;
+ struct rset_temp_info *info = ct->buf;
+ struct rset_temp_rfd *rfd;
assert (info->fd == -1);
if (info->fname)
exit (1);
}
}
+ rfd = xmalloc (sizeof(*rfd));
+ rfd->info = info;
r_rewind (ct);
- return 0;
+ return rfd;
}
-static void r_flush (struct rset_control *ct, int mk)
+/* r_flush:
+ flush current window to file if file is assocated with set
+ */
+static void r_flush (RSFD rfd, int mk)
{
- struct rset_temp_private *info = ct->buf;
+ struct rset_temp_info *info = ((struct rset_temp_rfd*) rfd)->info;
if (!info->fname && mk)
{
}
}
-static void r_close (struct rset_control *ct)
+static void r_close (RSFD rfd)
{
- struct rset_temp_private *info = ct->buf;
+ struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info;
- r_flush (ct, 0);
+ r_flush (rfd, 0);
if (info->fname && info->fd != -1)
{
close (info->fd);
static void r_delete (struct rset_control *ct)
{
- struct rset_temp_private *info = ct->buf;
+ struct rset_temp_info *info = ct->buf;
- r_close (ct);
if (info->fname)
unlink (info->fname);
free (info->buf_mem);
free (info);
}
-static void r_reread (struct rset_control *ct)
+/* 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_private *info = ct->buf;
+ struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info;
if (info->fname)
{
info->pos_border = info->pos_end;
}
-static void r_rewind (struct rset_control *ct)
+static void r_rewind (RSFD rfd)
{
- struct rset_temp_private *info = ct->buf;
+ struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info;
- r_flush (ct, 0);
+ r_flush (rfd, 0);
info->pos_cur = 0;
info->pos_buf = 0;
- r_reread (ct);
+ r_reread (rfd);
}
static int r_count (struct rset_control *ct)
{
- struct rset_temp_private *info = ct->buf;
+ struct rset_temp_info *info = ct->buf;
return info->pos_end / info->key_size;
}
-static int r_read (rset_control *ct, void *buf)
+static int r_read (RSFD rfd, void *buf)
{
- struct rset_temp_private *info = ct->buf;
+ struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info;
+
size_t nc = info->pos_cur + info->key_size;
if (nc > info->pos_border)
{
if (nc > info->pos_end)
return 0;
- r_flush (ct, 0);
+ r_flush (rfd, 0);
info->pos_buf = info->pos_cur;
- r_reread (ct);
+ r_reread (rfd);
}
memcpy (buf, info->buf_mem + (info->pos_cur - info->pos_buf),
info->key_size);
return 1;
}
-static int r_write (rset_control *ct, const void *buf)
+static int r_write (RSFD rfd, const void *buf)
{
- struct rset_temp_private *info = ct->buf;
+ struct rset_temp_info *info = ((struct rset_temp_rfd*)rfd)->info;
+
size_t nc = info->pos_cur + info->key_size;
if (nc > info->pos_buf + info->buf_size)
{
- r_flush (ct, 1);
+ r_flush (rfd, 1);
info->pos_buf = info->pos_cur;
- r_reread (ct);
+ r_reread (rfd);
+ info->dirty = 1;
}
memcpy (info->buf_mem + (info->pos_cur - info->pos_buf), buf,
info->key_size);
- info->dirty = 1;
- info->pos_border = info->pos_cur = nc;
+ info->pos_cur = nc;
+ if (nc > info->pos_end)
+ info->pos_border = info->pos_end = nc;
return 1;
}
projects / idzebra-moved-to-github.git / blobdiff