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/* mpz_cmp_ui.c -- Compare a mpz_t a with an mp_limb_t b. Return positive,
zero, or negative based on if a > b, a == b, or a < b.
Copyright 1991, 1993-1996, 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 https://www.gnu.org/licenses/. */
#include "gmp.h"
#include "gmp-impl.h"
int
_mpz_cmp_ui (mpz_srcptr u, unsigned long int v_digit) __GMP_NOTHROW
{
mp_ptr up;
mp_size_t un;
mp_limb_t ul;
up = PTR(u);
un = SIZ(u);
if (un == 0)
return -(v_digit != 0);
if (un == 1)
{
ul = up[0];
if (ul > v_digit)
return 1;
if (ul < v_digit)
return -1;
return 0;
}
#if GMP_NAIL_BITS != 0
if (v_digit > GMP_NUMB_MAX)
{
if (un == 2)
{
ul = up[0] + (up[1] << GMP_NUMB_BITS);
if ((up[1] >> GMP_NAIL_BITS) != 0)
return 1;
if (ul > v_digit)
return 1;
if (ul < v_digit)
return -1;
return 0;
}
}
#endif
return un > 0 ? 1 : -1;
}
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