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/* 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, 2012 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) __GMP_NOTHROW
{
mp_size_t usize = SIZ (u);
mp_size_t vsize;
mp_limb_t u_digit;
unsigned long int absv_digit = (unsigned long int) v_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;
absv_digit = -absv_digit;
}
if (usize != vsize)
return usize - vsize;
if (usize == 0)
return 0;
u_digit = PTR (u)[0];
if (u_digit == (mp_limb_t) absv_digit)
return 0;
if (u_digit > (mp_limb_t) absv_digit)
return usize;
else
return -usize;
}
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