1 /*
2 * Copyright 1987, 1988 by MIT Student Information Processing Board
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose is hereby granted, provided that
6 * the names of M.I.T. and the M.I.T. S.I.P.B. not be used in
7 * advertising or publicity pertaining to distribution of the software
8 * without specific, written prior permission. M.I.T. and the
9 * M.I.T. S.I.P.B. make no representations about the suitability of
10 * this software for any purpose. It is provided "as is" without
11 * express or implied warranty.
12 */
13
14 #ifdef HAVE_ERRNO_H
15 #include <errno.h>
16 #endif
17
18 #include "ss_internal.h"
19
20 #define ssrt ss_request_table /* for some readable code... */
21
ss_add_request_table(sci_idx,rqtbl_ptr,position,code_ptr)22 void ss_add_request_table(sci_idx, rqtbl_ptr, position, code_ptr)
23 int sci_idx;
24 ssrt *rqtbl_ptr;
25 int position; /* 1 -> becomes second... */
26 int *code_ptr;
27 {
28 register ss_data *info;
29 register int i, size;
30 ssrt **t;
31
32 info = ss_info(sci_idx);
33 for (size=0; info->rqt_tables[size] != (ssrt *)NULL; size++)
34 ;
35 /* size == C subscript of NULL == #elements */
36 size += 2; /* new element, and NULL */
37 t = (ssrt **)realloc(info->rqt_tables, (unsigned)size*sizeof(ssrt));
38 if (t == (ssrt **)NULL) {
39 *code_ptr = errno;
40 return;
41 }
42 info->rqt_tables = t;
43 if (position > size - 2)
44 position = size - 2;
45
46 if (size > 1)
47 for (i = size - 2; i >= position; i--)
48 info->rqt_tables[i+1] = info->rqt_tables[i];
49
50 info->rqt_tables[position] = rqtbl_ptr;
51 info->rqt_tables[size-1] = (ssrt *)NULL;
52 *code_ptr = 0;
53 }
54
ss_delete_request_table(sci_idx,rqtbl_ptr,code_ptr)55 void ss_delete_request_table(sci_idx, rqtbl_ptr, code_ptr)
56 int sci_idx;
57 ssrt *rqtbl_ptr;
58 int *code_ptr;
59 {
60 register ss_data *info;
61 register ssrt **rt1, **rt2;
62
63 *code_ptr = SS_ET_TABLE_NOT_FOUND;
64 info = ss_info(sci_idx);
65 rt1 = info->rqt_tables;
66 for (rt2 = rt1; *rt1; rt1++) {
67 if (*rt1 != rqtbl_ptr) {
68 *rt2++ = *rt1;
69 *code_ptr = 0;
70 }
71 }
72 *rt2 = (ssrt *)NULL;
73 return;
74 }
75