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 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 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 54 void 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
