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: }
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