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Annotation of OpenXM_contrib/gmp/mpz/fits_s.h, Revision 1.1

1.1     ! ohara       1: /* int mpz_fits_X_p (mpz_t z) -- test whether z fits signed type X.
        !             2:
        !             3: Copyright 1997, 2000, 2001, 2002 Free Software Foundation, Inc.
        !             4:
        !             5: This file is part of the GNU MP Library.
        !             6:
        !             7: The GNU MP 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 GNU MP 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 GNU MP 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:
        !            25:
        !            26: int
        !            27: FUNCTION (mpz_srcptr z)
        !            28: {
        !            29:   mp_size_t n = SIZ(z);
        !            30:   mp_ptr p = PTR(z);
        !            31:   mp_limb_t limb = p[0];
        !            32:
        !            33:   if (n == 0)
        !            34:     return 1;
        !            35:   if (n == 1)
        !            36:     return limb <= MAXIMUM;
        !            37:   if (n == -1)
        !            38:     return limb <= - (mp_limb_t) MINIMUM;
        !            39: #if GMP_NAIL_BITS != 0
        !            40:   {
        !            41:     if ((p[1] >> GMP_NAIL_BITS) == 0)
        !            42:       {
        !            43:        limb += p[1] << GMP_NUMB_BITS;
        !            44:        if (n == 2)
        !            45:          return limb <= MAXIMUM;
        !            46:        if (n == -2)
        !            47:          return limb <= - (mp_limb_t) MINIMUM;
        !            48:       }
        !            49:   }
        !            50: #endif
        !            51:   return 0;
        !            52: }