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/* Implement powerset-related runtime actions for CHILL.
Copyright (C) 1992, 93, 1994 Free Software Foundation, Inc.
Author: Bill Cox
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
#define __CHILL_LIB__
#include "powerset.h"
extern void cause_exception (char *exname, char *file, int lineno);
/*
* function __concatps
*
* parameters:
* OUT - pointer to output PS
* LEFT - pointer to left PS
* LEFTLEN - length of left PS in bits
* RIGHT - pointer to right PS
* RIGHTLEN - length of right PS in bits
*
* returns:
* void
*
* exceptions:
* none
*
* abstract:
* concatenates two powersets into the output powerset.
*
*/
extern void
__pscpy (SET_WORD *dps,
unsigned long dbl,
unsigned long doffset,
SET_WORD *sps,
unsigned long sbl,
unsigned long start,
unsigned long length);
void
__concatps (out, left, leftlen, right, rightlen)
SET_WORD *out;
SET_WORD *left;
unsigned long leftlen;
SET_WORD *right;
unsigned long rightlen;
{
/* allocated sizes for each set involved */
unsigned long outall, leftall, rightall;
if (!out)
{
/* FIXME: cause an exception */
}
else if (leftlen == 0 || !left)
{
if (rightlen == 0 || !right)
return; /* no work to do */
__pscpy (out, rightlen, (unsigned long)0,
right, rightlen, (unsigned long)0, rightlen);
}
else if (rightlen == 0 || !right)
{
if (leftlen == 0 || !left)
return; /* no work to do */
__pscpy (out, leftlen, (unsigned long)0,
left, leftlen, (unsigned long)0, leftlen);
}
/* copy the left powerset into bits 0..leftlen - 1 */
__pscpy (out, leftlen + rightlen, (unsigned long)0,
left, leftlen, (unsigned long)0, leftlen);
/* copy the right powerset into bits leftlen..leftlen+rightlen-1 */
__pscpy (out, leftlen + rightlen, leftlen,
right, rightlen, (unsigned long)0, rightlen);
}
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