2 * Copyright (C) 1994-1995, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.7 1995-09-07 13:58:08 adam
8 * New parameter: result-set file descriptor (RSFD) to support multiple
9 * positions within the same result-set.
10 * Boolean operators: and, or, not implemented.
12 * Revision 1.6 1995/09/06 16:10:58 adam
13 * More work on boolean sets.
15 * Revision 1.5 1995/09/04 15:20:13 adam
16 * More work on temp sets. is_open member removed.
18 * Revision 1.4 1995/09/04 09:09:52 adam
19 * String arg in dict lookup is const.
22 * Revision 1.3 1994/11/22 13:15:27 quinn
25 * Revision 1.2 1994/11/04 13:21:21 quinn
28 * Revision 1.1 1994/11/03 14:13:22 quinn
29 * Result set manipulation
40 typedef struct rset_control
42 char *desc; /* text description of set type (for debugging) */
43 void *buf; /* state data stored by subsystem */
44 struct rset_control *(*f_create)(const struct rset_control *sel, void *parms);
45 RSFD (*f_open)(struct rset_control *ct, int wflag);
46 void (*f_close)(RSFD rfd);
47 void (*f_delete)(struct rset_control *ct);
48 void (*f_rewind)(RSFD rfd);
49 int (*f_count)(struct rset_control *ct);
50 int (*f_read)(RSFD rfd, void *buf);
51 int (*f_write)(RSFD rfd, const void *buf);
56 rset_control *control;
59 RSET rset_create(const rset_control *sel, void *parms); /* parameters? */
61 /* int rset_open(RSET rs, int wflag); */
62 #define rset_open(rs, wflag) ((*(rs)->control->f_open)((rs)->control, (wflag)))
64 /* void rset_close(RSET rs); */
65 #define rset_close(rs, rfd) ((*(rs)->control->f_close)((rfd)))
67 void rset_delete(RSET rs);
69 /* void rset_rewind(RSET rs); */
70 #define rset_rewind(rs, rfd) ((*(rs)->control->f_rewind)((rfd)))
72 /* int rset_count(RSET rs); */
73 #define rset_count(rs) ((*(rs)->control->f_count)((rs)->control))
75 /* int rset_read(RSET rs, void *buf); */
76 #define rset_read(rs, fd, buf) ((*(rs)->control->f_read)((fd), (buf)))
78 /* int rset_write(RSET rs, const void *buf); */
79 #define rset_write(rs, fd, buf) ((*(rs)->control->f_write)((fd), (buf)))