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
22void 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
31	info = ss_info(sci_idx);
32	for (size=0; info->rqt_tables[size] != (ssrt *)NULL; size++)
33		;
34	/* size == C subscript of NULL == #elements */
35	size += 2;		/* new element, and NULL */
36	info->rqt_tables = (ssrt **)realloc(info->rqt_tables,
37					    (unsigned)size*sizeof(ssrt));
38	if (info->rqt_tables == (ssrt **)NULL) {
39		*code_ptr = errno;
40		return;
41	}
42	if (position > size - 2)
43		position = size - 2;
44
45	if (size > 1)
46		for (i = size - 2; i >= position; i--)
47			info->rqt_tables[i+1] = info->rqt_tables[i];
48
49	info->rqt_tables[position] = rqtbl_ptr;
50	info->rqt_tables[size-1] = (ssrt *)NULL;
51	*code_ptr = 0;
52}
53
54void ss_delete_request_table(sci_idx, rqtbl_ptr, code_ptr)
55     int sci_idx;
56     ssrt *rqtbl_ptr;
57     int *code_ptr;
58{
59     register ss_data *info;
60     register ssrt **rt1, **rt2;
61
62     *code_ptr = SS_ET_TABLE_NOT_FOUND;
63     info = ss_info(sci_idx);
64     rt1 = info->rqt_tables;
65     for (rt2 = rt1; *rt1; rt1++) {
66	  if (*rt1 != rqtbl_ptr) {
67	       *rt2++ = *rt1;
68	       *code_ptr = 0;
69	  }
70     }
71     *rt2 = (ssrt *)NULL;
72     return;
73}
74