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 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 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
