| /* mpz_cmp_si(u,v) -- Compare an integer U with a single-word int V. |
| Return positive, zero, or negative based on if U > V, U == V, or U < V. |
| |
| Copyright 1991, 1993, 1994, 1995, 1996, 2000, 2001, 2002 Free Software |
| Foundation, Inc. |
| |
| This file is part of the GNU MP Library. |
| |
| The GNU MP Library is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or (at your |
| option) any later version. |
| |
| The GNU MP Library is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ |
| |
| #include "gmp.h" |
| #include "gmp-impl.h" |
| |
| int |
| _mpz_cmp_si (mpz_srcptr u, signed long int v_digit) |
| { |
| mp_size_t usize = u->_mp_size; |
| mp_size_t vsize; |
| mp_limb_t u_digit; |
| |
| #if GMP_NAIL_BITS != 0 |
| /* FIXME. This isn't very pretty. */ |
| mpz_t tmp; |
| mp_limb_t tt[2]; |
| PTR(tmp) = tt; |
| ALLOC(tmp) = 2; |
| mpz_set_si (tmp, v_digit); |
| return mpz_cmp (u, tmp); |
| #endif |
| |
| vsize = 0; |
| if (v_digit > 0) |
| vsize = 1; |
| else if (v_digit < 0) |
| { |
| vsize = -1; |
| v_digit = -v_digit; |
| } |
| |
| if (usize != vsize) |
| return usize - vsize; |
| |
| if (usize == 0) |
| return 0; |
| |
| u_digit = u->_mp_d[0]; |
| |
| if (u_digit == (mp_limb_t) (unsigned long) v_digit) |
| return 0; |
| |
| if (u_digit > (mp_limb_t) (unsigned long) v_digit) |
| return usize; |
| else |
| return -usize; |
| } |