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/* int mpz_fits_X_p (mpz_t z) -- test whether z fits signed type X.
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Copyright 1997, 2000-2002 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any
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later version.
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or both in parallel, as here.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received copies of the GNU General Public License and the
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GNU Lesser General Public License along with the GNU MP Library. If not,
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see https://www.gnu.org/licenses/. */
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#include "gmp.h"
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#include "gmp-impl.h"
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int
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FUNCTION (mpz_srcptr z) __GMP_NOTHROW
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{
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mp_size_t n = SIZ(z);
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mp_ptr p = PTR(z);
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mp_limb_t limb = p[0];
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if (n == 0)
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return 1;
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if (n == 1)
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return limb <= MAXIMUM;
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if (n == -1)
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return limb <= NEG_CAST (mp_limb_t, MINIMUM);
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#if GMP_NAIL_BITS != 0
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{
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if ((p[1] >> GMP_NAIL_BITS) == 0)
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{
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limb += p[1] << GMP_NUMB_BITS;
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if (n == 2)
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return limb <= MAXIMUM;
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if (n == -2)
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return limb <= NEG_CAST (mp_limb_t, MINIMUM);
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}
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}
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#endif
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return 0;
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}
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