2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.9 1995-10-10 14:00:01 adam
8 * Function rset_open changed its wflag parameter to general flags.
10 * Revision 1.8 1995/10/06 14:37:53 adam
11 * New result set method: r_score.
12 * Local no (sysno) and score is transferred to retrieveCtrl.
14 * Revision 1.7 1995/09/07 13:58:08 adam
15 * New parameter: result-set file descriptor (RSFD) to support multiple
16 * positions within the same result-set.
17 * Boolean operators: and, or, not implemented.
19 * Revision 1.6 1995/09/06 16:10:58 adam
20 * More work on boolean sets.
22 * Revision 1.5 1995/09/04 15:20:13 adam
23 * More work on temp sets. is_open member removed.
25 * Revision 1.4 1995/09/04 09:09:52 adam
26 * String arg in dict lookup is const.
29 * Revision 1.3 1994/11/22 13:15:27 quinn
32 * Revision 1.2 1994/11/04 13:21:21 quinn
35 * Revision 1.1 1994/11/03 14:13:22 quinn
36 * Result set manipulation
47 typedef struct rset_control
49 char *desc; /* text description of set type (for debugging) */
50 void *buf; /* state data stored by subsystem */
51 struct rset_control *(*f_create)(const struct rset_control *sel, void *parms);
52 RSFD (*f_open)(struct rset_control *ct, int wflag);
53 void (*f_close)(RSFD rfd);
54 void (*f_delete)(struct rset_control *ct);
55 void (*f_rewind)(RSFD rfd);
56 int (*f_count)(struct rset_control *ct);
57 int (*f_read)(RSFD rfd, void *buf);
58 int (*f_write)(RSFD rfd, const void *buf);
59 int (*f_score)(RSFD rfd, int *score);
64 rset_control *control;
70 #define RSETF_SORT_SYSNO 0
71 #define RSETF_SORT_RANK 2
73 RSET rset_create(const rset_control *sel, void *parms); /* parameters? */
75 /* int rset_open(RSET rs, int wflag); */
76 #define rset_open(rs, wflag) ((*(rs)->control->f_open)((rs)->control, (wflag)))
78 /* void rset_close(RSET rs); */
79 #define rset_close(rs, rfd) ((*(rs)->control->f_close)((rfd)))
81 void rset_delete(RSET rs);
83 /* void rset_rewind(RSET rs); */
84 #define rset_rewind(rs, rfd) ((*(rs)->control->f_rewind)((rfd)))
86 /* int rset_count(RSET rs); */
87 #define rset_count(rs) ((*(rs)->control->f_count)((rs)->control))
89 /* int rset_read(RSET rs, void *buf); */
90 #define rset_read(rs, fd, buf) ((*(rs)->control->f_read)((fd), (buf)))
92 /* int rset_write(RSET rs, const void *buf); */
93 #define rset_write(rs, fd, buf) ((*(rs)->control->f_write)((fd), (buf)))
95 /* int rset_score(RSET rs, int *buf); */
96 #define rset_score(rs, fd, score) ((*(rs)->control->f_score)((fd), (score)))