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Annotation of OpenXM_contrib/gmp/mpz/popcount.c, Revision 1.1

1.1     ! maekawa     1: /* mpz_popcount(mpz_ptr op) -- Population count of OP.  If the operand is
        !             2:    negative, return ~0 (a novel representation of infinity).
        !             3:
        !             4: Copyright (C) 1994, 1996 Free Software Foundation, Inc.
        !             5:
        !             6: This file is part of the GNU MP Library.
        !             7:
        !             8: The GNU MP Library is free software; you can redistribute it and/or modify
        !             9: it under the terms of the GNU Library General Public License as published by
        !            10: the Free Software Foundation; either version 2 of the License, or (at your
        !            11: option) any later version.
        !            12:
        !            13: The GNU MP Library is distributed in the hope that it will be useful, but
        !            14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            15: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
        !            16: License for more details.
        !            17:
        !            18: You should have received a copy of the GNU Library General Public License
        !            19: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            21: MA 02111-1307, USA. */
        !            22:
        !            23: #include "gmp.h"
        !            24: #include "gmp-impl.h"
        !            25:
        !            26: unsigned long int
        !            27: #if __STDC__
        !            28: mpz_popcount (mpz_srcptr u)
        !            29: #else
        !            30: mpz_popcount (u)
        !            31:      mpz_srcptr u;
        !            32: #endif
        !            33: {
        !            34:   mp_size_t usize;
        !            35:
        !            36:   usize = u->_mp_size;
        !            37:
        !            38:   if ((usize) < 0)
        !            39:     return ~ (unsigned long int) 0;
        !            40:
        !            41:   return mpn_popcount (u->_mp_d, usize);
        !            42: }