| /* Implement POWERSET runtime actions for CHILL. |
| Copyright (C) 1992,1993 Free Software Foundation, Inc. |
| Author: Wilfried Moser, et al |
| |
| This file is part of GNU CC. |
| |
| GNU CC is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU CC is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU CC; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* As a special exception, if you link this library with other files, |
| some of which are compiled with GCC, to produce an executable, |
| this library does not by itself cause the resulting executable |
| to be covered by the GNU General Public License. |
| This exception does not however invalidate any other reasons why |
| the executable file might be covered by the GNU General Public License. */ |
| |
| #define __CHILL_LIB__ |
| |
| #include <stdio.h> |
| #include "powerset.h" |
| |
| extern void __cause_ex1 (char *exname, char *file, int lineno); |
| |
| /* |
| * function __setbitpowerset |
| * |
| * parameters: |
| * set destination set |
| * bitlength length of powerset in bits |
| * minval lowest valid set value |
| * bitno bit number within set |
| * new_value zero or one - (new bit value) |
| * |
| * returns: |
| * int 1 .. found |
| * 0 .. not found |
| * |
| * exceptions: |
| * rangefail |
| * |
| * abstract: |
| * checks if a given value is included in a powerset |
| * |
| */ |
| void |
| __setbitpowerset (powerset, bitlength, minval, bitno, new_value, filename, lineno) |
| SET_WORD *powerset; |
| unsigned long bitlength; |
| long minval; |
| long bitno; |
| char new_value; /* booleans are represented as 8 bit value */ |
| char * filename; |
| int lineno; |
| { |
| if (powerset == NULL |
| || bitno < minval |
| || (bitno - minval) >= bitlength) |
| __cause_ex1 ("rangefail", filename, lineno); |
| |
| bitno -= minval; |
| if (bitlength <= SET_CHAR_SIZE) |
| { |
| if (new_value & 1) |
| SET_BIT_IN_CHAR (*((SET_CHAR *)powerset), bitno); |
| else |
| CLEAR_BIT_IN_CHAR (*((SET_CHAR *)powerset), bitno); |
| } |
| else if (bitlength <= SET_SHORT_SIZE) |
| { |
| if (new_value & 1) |
| SET_BIT_IN_SHORT (*((SET_SHORT *)powerset), bitno); |
| else |
| CLEAR_BIT_IN_SHORT (*((SET_SHORT *)powerset), bitno); |
| } |
| else |
| { |
| powerset += (bitno/SET_WORD_SIZE); |
| bitno %= SET_WORD_SIZE; |
| if (new_value & 1) |
| SET_BIT_IN_WORD (*powerset, bitno); |
| else |
| CLEAR_BIT_IN_WORD (*powerset, bitno); |
| } |
| } |