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Annotation of OpenXM_contrib/gmp/mpfr/isinteger.c, Revision 1.1

1.1     ! ohara       1: /* mpfr_isinteger -- test if a mpfr variable is integer
        !             2:
        !             3: Copyright 2001 Free Software Foundation, Inc.
        !             4:
        !             5: This file is part of the MPFR Library.
        !             6:
        !             7: The MPFR Library is free software; you can redistribute it and/or modify
        !             8: it under the terms of the GNU Lesser General Public License as published by
        !             9: the Free Software Foundation; either version 2.1 of the License, or (at your
        !            10: option) any later version.
        !            11:
        !            12: The MPFR Library is distributed in the hope that it will be useful, but
        !            13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
        !            15: License for more details.
        !            16:
        !            17: You should have received a copy of the GNU Lesser General Public License
        !            18: along with the MPFR Library; see the file COPYING.LIB.  If not, write to
        !            19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            20: MA 02111-1307, USA. */
        !            21:
        !            22: #include "gmp.h"
        !            23: #include "gmp-impl.h"
        !            24: #include "mpfr.h"
        !            25: #include "mpfr-impl.h"
        !            26:
        !            27: int
        !            28: mpfr_isinteger (mpfr_srcptr x)
        !            29: {
        !            30:
        !            31:   mpfr_t u;
        !            32:   int expo;
        !            33:   mp_prec_t prec;
        !            34:   int result;
        !            35:
        !            36:   expo=(int)MPFR_EXP(x);
        !            37:   prec=MPFR_PREC(x);
        !            38:
        !            39:   if (expo<=0)
        !            40:     return 0;
        !            41:
        !            42:   if (expo>=prec)
        !            43:     return 1;
        !            44:
        !            45:   mpfr_init2(u,prec);
        !            46:   mpfr_trunc(u,x);
        !            47:
        !            48:   result = (mpfr_cmp (x,u) == 0);
        !            49:
        !            50:   mpfr_clear (u);
        !            51:   return result;
        !            52: }