freebsd-dev/contrib/libgmp/mpz/popcount.c
Mark Murray aa9bc17601 Clean import of libgmp 2.0.2, with only the non-x86 bits removed.
BMakefiles and other bits will follow.

Requested by:	Andrey Chernov
Made world by:	Chuck Robey
1996-10-20 08:49:26 +00:00

43 lines
1.2 KiB
C

/* mpz_popcount(mpz_ptr op) -- Population count of OP. If the operand is
negative, return ~0 (a novel representation of infinity).
Copyright (C) 1994, 1996 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
The GNU MP Library 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include "gmp.h"
#include "gmp-impl.h"
unsigned long int
#if __STDC__
mpz_popcount (mpz_srcptr u)
#else
mpz_popcount (u)
mpz_srcptr u;
#endif
{
mp_size_t usize;
usize = u->_mp_size;
if ((usize) < 0)
return ~ (unsigned long int) 0;
return mpn_popcount (u->_mp_d, usize);
}