-/*
- * Copyright (C) 1994-1998, Index Data I/S
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: rset.h,v $
- * Revision 1.15 1998-03-05 08:37:44 adam
- * New result set model.
- *
- * Revision 1.14 1998/02/10 11:56:46 adam
- * Implemented rset_dup.
- *
- * Revision 1.13 1997/12/18 10:54:24 adam
- * New method result set method rs_hits that returns the number of
- * hits in result-set (if known). The ranked result set returns real
- * number of hits but only when not combined with other operands.
- *
- * Revision 1.12 1997/09/05 15:30:03 adam
- * Changed prototype for chr_map_input - added const.
- * Added support for C++, headers uses extern "C" for public definitions.
- *
- * Revision 1.11 1995/12/11 09:07:53 adam
- * New rset member 'flag', that holds various flags about a result set -
- * currently 'volatile' (set is register dependent) and 'ranked' (set is
- * ranked).
- * New set types sand/sor/snot. They handle and/or/not for ranked and
- * semi-ranked result sets.
- *
- * Revision 1.10 1995/10/12 12:40:36 adam
- * Private info (buf) moved from struct rset_control to struct rset.
- * Member control in rset is statically set in rset_create.
- *
- * Revision 1.9 1995/10/10 14:00:01 adam
- * Function rset_open changed its wflag parameter to general flags.
- *
- * Revision 1.8 1995/10/06 14:37:53 adam
- * New result set method: r_score.
- * Local no (sysno) and score is transferred to retrieveCtrl.
- *
- * Revision 1.7 1995/09/07 13:58:08 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 16:10:58 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 1.31 2004-08-24 14:25:15 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
#ifdef __cplusplus
extern "C" {
#endif
-typedef void *RSFD;
+typedef void *RSFD; /* Rset "file descriptor" */
typedef struct rset *RSET;
-typedef struct rset_term *RSET_TERM;
struct rset_control
{
char *desc; /* text description of set type (for debugging) */
- void *(*f_create)(RSET ct, const struct rset_control *sel, void *parms);
+/* void *(*f_create)(RSET ct, const struct rset_control *sel, void *parms); */
RSFD (*f_open)(RSET ct, int wflag);
void (*f_close)(RSFD rfd);
void (*f_delete)(RSET ct);
void (*f_rewind)(RSFD rfd);
- int (*f_count)(RSET ct);
- int (*f_read)(RSFD rfd, void *buf, int *term_index);
+ int (*f_forward)(RSET ct, RSFD rfd, void *buf,
+ int (*cmpfunc)(const void *p1, const void *p2),
+ 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);
};
-struct rset_term {
- char *name;
- int nn;
- char *flags;
-};
+int rset_default_forward(RSET ct, RSFD rfd, void *buf,
+ int (*cmpfunc)(const void *p1, const void *p2),
+ const void *untilbuf);
+void rset_default_pos(RSFD rfd, double *current, double *total);
+
typedef struct rset
{
const struct rset_control *control;
- int flags;
- int count;
- void *buf;
- RSET_TERM *rset_terms;
- int no_rset_terms;
+ 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 */
} rset;
-
-RSET_TERM rset_term_create (const char *name, int length, const char *flags);
-void rset_term_destroy (RSET_TERM t);
-RSET_TERM rset_term_dup (RSET_TERM t);
+/* 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. */
#define RSETF_READ 0
#define RSETF_WRITE 1
-RSET rset_create(const struct rset_control *sel, void *parms);
+RSET rset_create_base(const struct rset_control *sel, NMEM nmem);
+
+RSET rset_create_OLD(const struct rset_control *sel, void *parms);
/* parameters? */
-/* int rset_open(RSET rs, int wflag); */
+void rset_delete(RSET rs);
+
+RSET rset_dup (RSET rs);
+
+
+/* RSFD rset_open(RSET rs, int wflag); */
#define rset_open(rs, wflag) (*(rs)->control->f_open)((rs), (wflag))
/* void rset_close(RSET rs); */
#define rset_close(rs, rfd) (*(rs)->control->f_close)(rfd)
-void rset_delete(RSET rs);
-
-RSET rset_dup (RSET rs);
-
/* void rset_rewind(RSET rs); */
#define rset_rewind(rs, rfd) (*(rs)->control->f_rewind)((rfd))
-/* int rset_count(RSET rs); */
-#define rset_count(rs) (*(rs)->control->f_count)(rs)
+/* int rset_forward(RSET rs, void *buf, void *untilbuf); */
+#define rset_forward(rs, fd, buf, cmpfunc, untilbuf) \
+ (*(rs)->control->f_forward)((rs), (fd), (buf), (cmpfunc), (untilbuf))
+
+/* int rset_pos(RSET rs, RSFD fd, double *current, double *total); */
+#define rset_pos(rs,fd,cur,tot) \
+ (*(rs)->control->f_pos)( (fd),(cur),(tot))
/* int rset_read(RSET rs, void *buf); */
-#define rset_read(rs, fd, buf, indx) (*(rs)->control->f_read)((fd), (buf), indx)
+#define rset_read(rs, fd, buf) (*(rs)->control->f_read)((fd), (buf))
/* int rset_write(RSET rs, const void *buf); */
#define rset_write(rs, fd, buf) (*(rs)->control->f_write)((fd), (buf))
/* int rset_type (RSET) */
#define rset_type(rs) ((rs)->control->desc)
-#define RSET_FLAG_VOLATILE 1
-
-#define rset_is_volatile(rs) ((rs)->flags & RSET_FLAG_VOLATILE)
#ifdef __cplusplus
}