2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.10 1995-10-12 12:40:36 adam
8 * Private info (buf) moved from struct rset_control to struct rset.
9 * Member control in rset is statically set in rset_create.
11 * Revision 1.9 1995/10/10 14:00:01 adam
12 * Function rset_open changed its wflag parameter to general flags.
14 * Revision 1.8 1995/10/06 14:37:53 adam
15 * New result set method: r_score.
16 * Local no (sysno) and score is transferred to retrieveCtrl.
18 * Revision 1.7 1995/09/07 13:58:08 adam
19 * New parameter: result-set file descriptor (RSFD) to support multiple
20 * positions within the same result-set.
21 * Boolean operators: and, or, not implemented.
23 * Revision 1.6 1995/09/06 16:10:58 adam
24 * More work on boolean sets.
26 * Revision 1.5 1995/09/04 15:20:13 adam
27 * More work on temp sets. is_open member removed.
29 * Revision 1.4 1995/09/04 09:09:52 adam
30 * String arg in dict lookup is const.
33 * Revision 1.3 1994/11/22 13:15:27 quinn
36 * Revision 1.2 1994/11/04 13:21:21 quinn
39 * Revision 1.1 1994/11/03 14:13:22 quinn
40 * Result set manipulation
51 typedef struct rset *RSET;
53 typedef struct rset_control
55 char *desc; /* text description of set type (for debugging) */
56 void *(*f_create)(const struct rset_control *sel, void *parms);
57 RSFD (*f_open)(RSET ct, int wflag);
58 void (*f_close)(RSFD rfd);
59 void (*f_delete)(RSET ct);
60 void (*f_rewind)(RSFD rfd);
61 int (*f_count)(RSET ct);
62 int (*f_read)(RSFD rfd, void *buf);
63 int (*f_write)(RSFD rfd, const void *buf);
64 int (*f_score)(RSFD rfd, int *score);
69 const rset_control *control;
76 #define RSETF_SORT_SYSNO 0
77 #define RSETF_SORT_RANK 2
79 RSET rset_create(const rset_control *sel, void *parms); /* parameters? */
81 /* int rset_open(RSET rs, int wflag); */
82 #define rset_open(rs, wflag) ((*(rs)->control->f_open)((rs), (wflag)))
84 /* void rset_close(RSET rs); */
85 #define rset_close(rs, rfd) ((*(rs)->control->f_close)((rfd)))
87 void rset_delete(RSET rs);
89 /* void rset_rewind(RSET rs); */
90 #define rset_rewind(rs, rfd) ((*(rs)->control->f_rewind)((rfd)))
92 /* int rset_count(RSET rs); */
93 #define rset_count(rs) ((*(rs)->control->f_count)(rs))
95 /* int rset_read(RSET rs, void *buf); */
96 #define rset_read(rs, fd, buf) ((*(rs)->control->f_read)((fd), (buf)))
98 /* int rset_write(RSET rs, const void *buf); */
99 #define rset_write(rs, fd, buf) ((*(rs)->control->f_write)((fd), (buf)))
101 /* int rset_score(RSET rs, int *buf); */
102 #define rset_score(rs, fd, score) ((*(rs)->control->f_score)((fd), (score)))