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Annotation of OpenXM_contrib/gmp/mpf/int_p.c, Revision 1.1

1.1     ! ohara       1: /* mpf_integer_p -- test whether an mpf is an integer */
        !             2:
        !             3: /*
        !             4: Copyright 2001, 2002 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 Lesser General Public License as published by
        !            10: the Free Software Foundation; either version 2.1 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 Lesser General Public
        !            16: License for more details.
        !            17:
        !            18: You should have received a copy of the GNU Lesser 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:
        !            24: #include "gmp.h"
        !            25: #include "gmp-impl.h"
        !            26:
        !            27:
        !            28: int
        !            29: mpf_integer_p (mpf_srcptr f)
        !            30: {
        !            31:   mp_srcptr ptr;
        !            32:   mp_exp_t exp;
        !            33:   mp_size_t size, frac, i;
        !            34:
        !            35:   size = SIZ (f);
        !            36:   if (size == 0)
        !            37:     return 1;  /* zero is an integer */
        !            38:
        !            39:   exp = EXP (f);
        !            40:   if (exp <= 0)
        !            41:     return 0;  /* has only fraction limbs */
        !            42:
        !            43:   /* any fraction limbs must be zero */
        !            44:   frac = ABS (size) - exp;
        !            45:   ptr = PTR (f);
        !            46:   for (i = 0; i < frac; i++)
        !            47:     if (ptr[i] != 0)
        !            48:       return 0;
        !            49:
        !            50:   return 1;
        !            51: }