1/* int mpz_fits_X_p (mpz_t z) -- test whether z fits signed type X. 2 3Copyright 1997, 2000, 2001, 2002 Free Software Foundation, Inc. 4 5This file is part of the GNU MP Library. 6 7The GNU MP Library is free software; you can redistribute it and/or modify 8it under the terms of the GNU Lesser General Public License as published by 9the Free Software Foundation; either version 3 of the License, or (at your 10option) any later version. 11 12The GNU MP Library is distributed in the hope that it will be useful, but 13WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15License for more details. 16 17You should have received a copy of the GNU Lesser General Public License 18along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ 19 20#include "gmp.h" 21#include "gmp-impl.h" 22 23 24int 25FUNCTION (mpz_srcptr z) 26{ 27 mp_size_t n = SIZ(z); 28 mp_ptr p = PTR(z); 29 mp_limb_t limb = p[0]; 30 31 if (n == 0) 32 return 1; 33 if (n == 1) 34 return limb <= MAXIMUM; 35 if (n == -1) 36 return limb <= - (mp_limb_t) MINIMUM; 37#if GMP_NAIL_BITS != 0 38 { 39 if ((p[1] >> GMP_NAIL_BITS) == 0) 40 { 41 limb += p[1] << GMP_NUMB_BITS; 42 if (n == 2) 43 return limb <= MAXIMUM; 44 if (n == -2) 45 return limb <= - (mp_limb_t) MINIMUM; 46 } 47 } 48#endif 49 return 0; 50} 51