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Annotation of OpenXM_contrib/gmp/mpz/popcount.c, Revision 1.1.1.2

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
1.1.1.2 ! maekawa     9: it under the terms of the GNU Lesser General Public License as published by
        !            10: the Free Software Foundation; either version 2.1 of the License, or (at your
1.1       maekawa    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
1.1.1.2 ! maekawa    15: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
1.1       maekawa    16: License for more details.
                     17:
1.1.1.2 ! maekawa    18: You should have received a copy of the GNU Lesser General Public License
1.1       maekawa    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: }