/*
- * Copyright (C) 1994, Index Data I/S
+ * Copyright (C) 1994-1998, Index Data I/S
* All rights reserved.
* Sebastian Hammer, Adam Dickmeiss
*
* $Log: rset.h,v $
- * Revision 1.2 1994-11-04 13:21:21 quinn
+ * 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
#ifndef RSET_H
#define RSET_H
-typedef struct rset_control
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+typedef void *RSFD;
+
+typedef struct rset *RSET;
+typedef struct rset_term *RSET_TERM;
+
+struct rset_control
{
char *desc; /* text description of set type (for debugging) */
- char *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;
+ 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_write)(RSFD rfd, const void *buf);
+};
+
+struct rset_term {
+ char *name;
+ int nn;
+ char *flags;
+};
typedef struct rset
{
- int is_open;
- rset_control *control;
-} rset, *RSET;
+ const struct rset_control *control;
+ int flags;
+ int count;
+ void *buf;
+ RSET_TERM *rset_terms;
+ int no_rset_terms;
+} rset;
-RSET rset_create(const rset_control *sel, void *parms); /* parameters? */
+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);
+
+#define RSETF_READ 0
+#define RSETF_WRITE 1
+
+RSET rset_create(const struct 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)))
+#define rset_open(rs, wflag) (*(rs)->control->f_open)((rs), (wflag))
/* void rset_close(RSET rs); */
-#define rset_close(rs) ((*(rs)->control->f_close)((rs)->control))
+#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, wflag) ((*(rs)->control->f_rewind)((rs)->control))
+#define rset_rewind(rs, rfd) (*(rs)->control->f_rewind)((rfd))
/* int rset_count(RSET rs); */
-#define rset_count(rs, wflag) ((*(rs)->control->f_count)((rs)->control))
+#define rset_count(rs) (*(rs)->control->f_count)(rs)
-int rset_read(RSET rs, void *buf); /* change parameters */
-int rset_write(RSET rs, void *buf); /* change parameters */
+/* int rset_read(RSET rs, void *buf); */
+#define rset_read(rs, fd, buf, indx) (*(rs)->control->f_read)((fd), (buf), indx)
+
+/* 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
+}
+#endif
#endif
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