version 1.1, 2000/01/10 15:35:27 |
version 1.1.1.3, 2003/08/25 16:06:34 |
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/* mpz_sqrt(root, u) -- Set ROOT to floor(sqrt(U)). |
/* mpz_sqrt(root, u) -- Set ROOT to floor(sqrt(U)). |
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Copyright (C) 1991, 1993, 1994, 1996 Free Software Foundation, Inc. |
Copyright 1991, 1993, 1994, 1996, 2000, 2001 Free Software Foundation, 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. */ |
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#include <stdio.h> /* for NULL */ |
#include "gmp.h" |
#include "gmp.h" |
#include "gmp-impl.h" |
#include "gmp-impl.h" |
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void |
void |
#if __STDC__ |
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mpz_sqrt (mpz_ptr root, mpz_srcptr op) |
mpz_sqrt (mpz_ptr root, mpz_srcptr op) |
#else |
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mpz_sqrt (root, op) |
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mpz_ptr root; |
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mpz_srcptr op; |
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#endif |
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{ |
{ |
mp_size_t op_size, root_size; |
mp_size_t op_size, root_size; |
mp_ptr root_ptr, op_ptr; |
mp_ptr root_ptr, op_ptr; |
Line 39 mpz_sqrt (root, op) |
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Line 34 mpz_sqrt (root, op) |
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TMP_MARK (marker); |
TMP_MARK (marker); |
op_size = op->_mp_size; |
op_size = op->_mp_size; |
if (op_size < 0) |
if (op_size <= 0) |
op_size = 1 / (op_size > 0); /* Divide by zero for negative OP. */ |
{ |
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if (op_size < 0) |
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SQRT_OF_NEGATIVE; |
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SIZ(root) = 0; |
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return; |
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} |
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/* The size of the root is accurate after this simple calculation. */ |
/* The size of the root is accurate after this simple calculation. */ |
root_size = (op_size + 1) / 2; |
root_size = (op_size + 1) / 2; |
Line 56 mpz_sqrt (root, op) |
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Line 56 mpz_sqrt (root, op) |
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free_me_size = root->_mp_alloc; |
free_me_size = root->_mp_alloc; |
} |
} |
else |
else |
(*_mp_free_func) (root_ptr, root->_mp_alloc * BYTES_PER_MP_LIMB); |
(*__gmp_free_func) (root_ptr, root->_mp_alloc * BYTES_PER_MP_LIMB); |
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root->_mp_alloc = root_size; |
root->_mp_alloc = root_size; |
root_ptr = (mp_ptr) (*_mp_allocate_func) (root_size * BYTES_PER_MP_LIMB); |
root_ptr = (mp_ptr) (*__gmp_allocate_func) (root_size * BYTES_PER_MP_LIMB); |
root->_mp_d = root_ptr; |
root->_mp_d = root_ptr; |
} |
} |
else |
else |
Line 80 mpz_sqrt (root, op) |
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Line 80 mpz_sqrt (root, op) |
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root->_mp_size = root_size; |
root->_mp_size = root_size; |
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if (free_me != NULL) |
if (free_me != NULL) |
(*_mp_free_func) (free_me, free_me_size * BYTES_PER_MP_LIMB); |
(*__gmp_free_func) (free_me, free_me_size * BYTES_PER_MP_LIMB); |
TMP_FREE (marker); |
TMP_FREE (marker); |
} |
} |