73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
|
/* 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"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* function __inpowerset
|
||
|
|
*
|
||
|
|
* parameters:
|
||
|
|
* bitno bit number within set
|
||
|
|
* powerset the powerset
|
||
|
|
* bitlength length of powerset in bits
|
||
|
|
* minval number of lowest bit stored
|
||
|
|
*
|
||
|
|
* returns:
|
||
|
|
* int 1 .. found
|
||
|
|
* 0 .. not found
|
||
|
|
*
|
||
|
|
* exceptions:
|
||
|
|
* rangefail
|
||
|
|
*
|
||
|
|
* abstract:
|
||
|
|
* checks if a given value is included in a powerset
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
__inpowerset (bitno, powerset, bitlength, minval)
|
||
|
|
unsigned long bitno;
|
||
|
|
SET_WORD *powerset;
|
||
|
|
unsigned long bitlength;
|
||
|
|
long minval;
|
||
|
|
{
|
||
|
|
if (bitno < minval || (bitno - minval) >= bitlength)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
bitno -= minval;
|
||
|
|
if (bitlength <= SET_CHAR_SIZE)
|
||
|
|
return GET_BIT_IN_CHAR (*((SET_CHAR *)powerset), bitno);
|
||
|
|
else if (bitlength <= SET_SHORT_SIZE)
|
||
|
|
return GET_BIT_IN_SHORT (*((SET_SHORT *)powerset), bitno);
|
||
|
|
else
|
||
|
|
return GET_BIT_IN_WORD (powerset[bitno / SET_WORD_SIZE],
|
||
|
|
bitno % SET_WORD_SIZE);
|
||
|
|
}
|