version 1.1.1.1, 2000/01/10 15:35:27 |
version 1.1.1.2, 2000/09/09 14:12:58 |
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/* mpz_setbit -- set a specified bit. |
/* mpz_setbit -- set a specified bit. |
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Copyright (C) 1991, 1993, 1994, 1995 Free Software Foundation, Inc. |
Copyright (C) 1991, 1993, 1994, 1995, 1997, 1999 Free Software Foundation, |
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Inc. |
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This file is part of the GNU MP Library. |
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 |
The GNU MP Library is free software; you can redistribute it and/or modify |
it under the terms of the GNU Library General Public License as published by |
it under the terms of the GNU Lesser General Public License as published by |
the Free Software Foundation; either version 2 of the License, or (at your |
the Free Software Foundation; either version 2.1 of the License, or (at your |
option) any later version. |
option) any later version. |
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The GNU MP Library is distributed in the hope that it will be useful, but |
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 |
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public |
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
License for more details. |
License for more details. |
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You should have received a copy of the GNU Library General Public License |
You should have received a copy of the GNU Lesser General Public License |
along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
MA 02111-1307, USA. */ |
MA 02111-1307, USA. */ |
Line 63 mpz_setbit (d, bit_index) |
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Line 64 mpz_setbit (d, bit_index) |
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/* Simulate two's complement arithmetic, i.e. simulate |
/* Simulate two's complement arithmetic, i.e. simulate |
1. Set OP = ~(OP - 1) [with infinitely many leading ones]. |
1. Set OP = ~(OP - 1) [with infinitely many leading ones]. |
2. set the bit. |
2. Set the bit. |
3. Set OP = ~OP + 1. */ |
3. Set OP = ~OP + 1. */ |
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dsize = -dsize; |
dsize = -dsize; |
Line 108 mpz_setbit (d, bit_index) |
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Line 109 mpz_setbit (d, bit_index) |
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} |
} |
} |
} |
else |
else |
; |
{ |
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mpn_decr_u (dp + limb_index, |
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(mp_limb_t) 1 << (bit_index % BITS_PER_MP_LIMB)); |
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dsize -= dp[dsize - 1] == 0; |
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d->_mp_size = -dsize; |
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} |
} |
} |
} |
} |