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Annotation of OpenXM_contrib/gmp/mpf/int_p.c, Revision 1.1.1.1

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: }