2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.11 1995-12-11 09:07:53 adam
8 * New rset member 'flag', that holds various flags about a result set -
9 * currently 'volatile' (set is register dependent) and 'ranked' (set is
11 * New set types sand/sor/snot. They handle and/or/not for ranked and
12 * semi-ranked result sets.
14 * Revision 1.10 1995/10/12 12:40:36 adam
15 * Private info (buf) moved from struct rset_control to struct rset.
16 * Member control in rset is statically set in rset_create.
18 * Revision 1.9 1995/10/10 14:00:01 adam
19 * Function rset_open changed its wflag parameter to general flags.
21 * Revision 1.8 1995/10/06 14:37:53 adam
22 * New result set method: r_score.
23 * Local no (sysno) and score is transferred to retrieveCtrl.
25 * Revision 1.7 1995/09/07 13:58:08 adam
26 * New parameter: result-set file descriptor (RSFD) to support multiple
27 * positions within the same result-set.
28 * Boolean operators: and, or, not implemented.
30 * Revision 1.6 1995/09/06 16:10:58 adam
31 * More work on boolean sets.
33 * Revision 1.5 1995/09/04 15:20:13 adam
34 * More work on temp sets. is_open member removed.
36 * Revision 1.4 1995/09/04 09:09:52 adam
37 * String arg in dict lookup is const.
40 * Revision 1.3 1994/11/22 13:15:27 quinn
43 * Revision 1.2 1994/11/04 13:21:21 quinn
46 * Revision 1.1 1994/11/03 14:13:22 quinn
47 * Result set manipulation
58 typedef struct rset *RSET;
60 typedef struct rset_control
62 char *desc; /* text description of set type (for debugging) */
63 void *(*f_create)(const struct rset_control *sel, void *parms,
65 RSFD (*f_open)(RSET ct, int wflag);
66 void (*f_close)(RSFD rfd);
67 void (*f_delete)(RSET ct);
68 void (*f_rewind)(RSFD rfd);
69 int (*f_count)(RSET ct);
70 int (*f_read)(RSFD rfd, void *buf);
71 int (*f_write)(RSFD rfd, const void *buf);
72 int (*f_score)(RSFD rfd, int *score);
77 const rset_control *control;
85 #define RSETF_SORT_SYSNO 0
86 #define RSETF_SORT_RANK 2
88 RSET rset_create(const rset_control *sel, void *parms); /* parameters? */
90 /* int rset_open(RSET rs, int wflag); */
91 #define rset_open(rs, wflag) ((*(rs)->control->f_open)((rs), (wflag)))
93 /* void rset_close(RSET rs); */
94 #define rset_close(rs, rfd) ((*(rs)->control->f_close)((rfd)))
96 void rset_delete(RSET rs);
98 /* void rset_rewind(RSET rs); */
99 #define rset_rewind(rs, rfd) ((*(rs)->control->f_rewind)((rfd)))
101 /* int rset_count(RSET rs); */
102 #define rset_count(rs) ((*(rs)->control->f_count)(rs))
104 /* int rset_read(RSET rs, void *buf); */
105 #define rset_read(rs, fd, buf) ((*(rs)->control->f_read)((fd), (buf)))
107 /* int rset_write(RSET rs, const void *buf); */
108 #define rset_write(rs, fd, buf) ((*(rs)->control->f_write)((fd), (buf)))
110 /* int rset_score(RSET rs, int *buf); */
111 #define rset_score(rs, fd, score) ((*(rs)->control->f_score)((fd), (score)))
113 /* int rset_type (RSET) */
114 #define rset_type(rs) ((rs)->control->desc)
116 #define RSET_FLAG_VOLATILE 1
117 #define RSET_FLAG_RANKED 2
119 #define rset_is_volatile(rs) ((rs)->flags & RSET_FLAG_VOLATILE)
120 #define rset_is_ranked(rs) ((rs)->flags & RSET_FLAG_RANKED)