-/*
- * Copyright (C) 1994-1995, Index Data I/S
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: rset.h,v $
- * Revision 1.6 1995-09-06 16:10:58 adam
- * More work on boolean sets.
- *
- * Revision 1.5 1995/09/04 15:20:13 adam
- * More work on temp sets. is_open member removed.
- *
- * Revision 1.4 1995/09/04 09:09:52 adam
- * String arg in dict lookup is const.
- * Minor changes.
- *
- * Revision 1.3 1994/11/22 13:15:27 quinn
- * Simple
- *
- * Revision 1.2 1994/11/04 13:21:21 quinn
- * Working.
- *
- * Revision 1.1 1994/11/03 14:13:22 quinn
- * Result set manipulation
- *
- */
+/* $Id: rset.h,v 1.34 2004-09-09 10:08:04 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.
+*/
+
+
#ifndef RSET_H
#define RSET_H
#include <stdlib.h>
-typedef struct rset_control
+/* unfortunately we need the isam includes here, for the arguments for */
+/* rsisamX_create */
+#include <isamb.h>
+#include <isamc.h>
+#include <isams.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct rsfd *RSFD; /* Rset "file descriptor" */
+typedef struct rset *RSET; /* Result set */
+
+struct rsfd { /* the stuff common to all rsfd's. */
+ RSET rset; /* ptr to the rset this FD is opened to */
+ void *priv; /* private parameters for this type */
+ RSFD next; /* to keep lists of used/free rsfd's */
+};
+
+
+struct rset_control
{
char *desc; /* text description of set type (for debugging) */
- void *buf; /* state data stored by subsystem */
- struct rset_control *(*f_create)(const struct rset_control *sel, void *parms);
- int (*f_open)(struct rset_control *ct, int wflag);
- void (*f_close)(struct rset_control *ct);
- void (*f_delete)(struct rset_control *ct);
- void (*f_rewind)(struct rset_control *ct);
- int (*f_count)(struct rset_control *ct);
- int (*f_read)(struct rset_control *ct, void *buf);
- int (*f_write)(struct rset_control *ct, const void *buf);
-} rset_control;
+/* RSET rs_something_create(const struct rset_control *sel, ...); */
+ void (*f_delete)(RSET ct);
+ RSFD (*f_open)(RSET ct, int wflag);
+ void (*f_close)(RSFD rfd);
+ void (*f_rewind)(RSFD rfd);
+ int (*f_forward)(RSFD rfd, void *buf, const void *untilbuf);
+ void (*f_pos)(RSFD rfd, double *current, double *total);
+ /* returns -1,-1 if pos function not implemented for this type */
+ int (*f_read)(RSFD rfd, void *buf);
+ int (*f_write)(RSFD rfd, const void *buf);
+};
+
+int rset_default_forward(RSFD rfd, void *buf,
+ const void *untilbuf);
+
+struct key_control {
+ int key_size;
+ int scope; /* default for what level we operate (book/chapter/verse) on*/
+ /* usual sysno/seqno is 2 */
+ int (*cmp) (const void *p1, const void *p2);
+ void (*key_logdump_txt) (int logmask, const void *p, const char *txt);
+ zint (*getseq)(const void *p);
+ /* FIXME - Should not need a getseq, it won't make much sense with */
+ /* higher-order keys. Use a (generalized) cmp instead, or something */
+ /* FIXME - decode and encode, and lots of other stuff */
+};
typedef struct rset
{
- rset_control *control;
-} rset, *RSET;
+ const struct rset_control *control;
+ const struct key_control *keycontrol;
+ int count; /* reference count */
+ void *priv; /* stuff private to the given type of rset */
+ NMEM nmem; /* nibble memory for various allocs */
+ char my_nmem; /* Should the nmem be destroyed with the rset? */
+ /* 1 if created with it, 0 if passed from above */
+ RSFD free_list; /* all rfd's allocated but not currently in use */
+ int scope; /* On what level do we count hits and compare them? */
+} rset;
+/* rset is a "virtual base class", which will never exist on its own
+ * all instances are rsets of some specific type, like rsisamb, or rsbool
+ * They keep their own stuff behind the priv pointer. */
-RSET rset_create(const rset_control *sel, void *parms); /* parameters? */
-
-/* int rset_open(RSET rs, int wflag); */
-#define rset_open(rs, wflag) ((*(rs)->control->f_open)((rs)->control, (wflag)))
+/* On the old sysno-seqno type isams, the scope was hard-coded to be 2.
+ * This means that we count hits on the sysno level, and when matching an
+ * 'and', we consider it a match if both term occur within the same sysno.
+ * In more complex isams we can specify on what level we wish to do the
+ * matching and counting of hits. For example, we can have book / chapter /
+ * verse, and a seqno. Scope 2 means then "give me all verses that match",
+ * 3 would be chapters, 4 books.
+ * The resolution tells how much of the occurences we need to return. If we
+ * are doing some sort of proximity, we need to get the seqnos of all
+ * occurences, whereas if we are only counting hits, we do not need anything
+ * below the scope. Again 1 is seqnos, 2 sysnos (or verses), 3 books, etc.
+ */
+/* FIXME - Add a resolution, to decide on what level we want to return */
+/* hits. That can well be below scope, if we need to get seqnos for prox */
+/* or suchlike... */
-/* void rset_close(RSET rs); */
-#define rset_close(rs) ((*(rs)->control->f_close)((rs)->control))
+RSFD rfd_create_base(RSET rs);
+void rfd_delete_base(RSFD rfd);
+RSET rset_create_base(const struct rset_control *sel,
+ NMEM nmem,
+ const struct key_control *kcontrol,
+ int scope );
void rset_delete(RSET rs);
+RSET rset_dup (RSET rs);
+
+
+#define RSETF_READ 0
+#define RSETF_WRITE 1
+/* RSFD rset_open(RSET rs, int wflag); */
+#define rset_open(rs, wflag) (*(rs)->control->f_open)((rs), (wflag))
-/* void rset_rewind(RSET rs); */
-#define rset_rewind(rs) ((*(rs)->control->f_rewind)((rs)->control))
+/* void rset_close(RSFD rfd); */
+#define rset_close(rfd) (*(rfd)->rset->control->f_close)(rfd)
-/* int rset_count(RSET rs); */
-#define rset_count(rs) ((*(rs)->control->f_count)((rs)->control))
+/* void rset_rewind(RSFD rfd); */
+#define rset_rewind(rfd) (*(rfd)->rset->control->f_rewind)((rfd))
-/* int rset_read(RSET rs, void *buf); */
-#define rset_read(rs, buf) ((*(rs)->control->f_read)((rs)->control, (buf)))
+/* int rset_forward(RSFD rfd, void *buf, void *untilbuf); */
+#define rset_forward(rfd, buf, untilbuf) \
+ (*(rfd)->rset->control->f_forward)((rfd),(buf),(untilbuf))
-/* int rset_write(RSET rs, const void *buf); */
-#define rset_write(rs, buf) ((*(rs)->control->f_write)((rs)->control, (buf)))
+/* int rset_pos(RSFD fd, double *current, double *total); */
+#define rset_pos(rfd,cur,tot) \
+ (*(rfd)->rset->control->f_pos)( (rfd),(cur),(tot))
+
+/* int rset_read(RSFD rfd, void *buf); */
+#define rset_read(rfd, buf) (*(rfd)->rset->control->f_read)((rfd), (buf))
+
+/* int rset_write(RSFD rfd, const void *buf); */
+#define rset_write(rfd, buf) (*(rfd)->rset->control->f_write)((rfd), (buf))
+
+/* int rset_type (RSET) */
+#define rset_type(rs) ((rs)->control->desc)
+
+RSET rstemp_create( NMEM nmem, const struct key_control *kcontrol,
+ int scope,
+ const char *temp_path);
+
+RSET rsnull_create(NMEM nmem, const struct key_control *kcontrol);
+
+RSET rsbool_create_and( NMEM nmem, const struct key_control *kcontrol,
+ int scope,
+ RSET rset_l, RSET rset_r);
+
+RSET rsbool_create_or ( NMEM nmem, const struct key_control *kcontrol,
+ int scope,
+ RSET rset_l, RSET rset_r);
+
+RSET rsbool_create_not( NMEM nmem, const struct key_control *kcontrol,
+ int scope,
+ RSET rset_l, RSET rset_r);
+
+RSET rsbetween_create( NMEM nmem, const struct key_control *kcontrol,
+ int scope,
+ RSET rset_l, RSET rset_m, RSET rset_r,
+ RSET rset_attr);
+
+RSET rsmultior_create( NMEM nmem, const struct key_control *kcontrol,
+ int scope,
+ int no_rsets, RSET* rsets);
+
+RSET rsprox_create( NMEM nmem, const struct key_control *kcontrol,
+ int scope,
+ int rset_no, RSET *rset,
+ int ordered, int exclusion,
+ int relation, int distance);
+
+RSET rsisamb_create( NMEM nmem, const struct key_control *kcontrol,
+ int scope,
+ ISAMB is, ISAMB_P pos);
+
+RSET rsisamc_create( NMEM nmem, const struct key_control *kcontrol,
+ int scope,
+ ISAMC is, ISAMC_P pos);
+
+RSET rsisams_create( NMEM nmem, const struct key_control *kcontrol,
+ int scope,
+ ISAMS is, ISAMS_P pos);
+
+
+
+#ifdef __cplusplus
+}
+#endif
#endif
projects / idzebra-moved-to-github.git / blobdiff