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aa9bc17601
BMakefiles and other bits will follow. Requested by: Andrey Chernov Made world by: Chuck Robey
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/* mpz_get_si(integer) -- Return the least significant digit from INTEGER.
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Copyright (C) 1991, 1993, 1994, 1995 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 the GNU Library General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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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 Library General Public
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License for more details.
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You should have received a copy of the GNU Library General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA. */
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#include "gmp.h"
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#include "gmp-impl.h"
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signed long int
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#if __STDC__
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mpz_get_si (mpz_srcptr op)
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#else
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mpz_get_si (op)
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mpz_srcptr op;
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#endif
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{
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mp_size_t size = op->_mp_size;
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mp_limb_t low_limb = op->_mp_d[0];
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if (size > 0)
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return low_limb % ((mp_limb_t) 1 << (BITS_PER_MP_LIMB - 1));
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else if (size < 0)
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/* This convoluted expression is necessary to properly handle 0x80000000 */
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return ~((low_limb - 1) % ((mp_limb_t) 1 << (BITS_PER_MP_LIMB - 1)));
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else
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return 0;
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}
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