version 1.1.1.1, 2000/09/09 14:12:19 |
version 1.1.1.2, 2003/08/25 16:06:07 |
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/* mpfr_set_prec -- reset the precision of a floating-point number |
/* mpfr_set_prec -- reset the precision of a floating-point number |
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Copyright (C) 1999 PolKA project, Inria Lorraine and Loria |
Copyright 1999, 2001 Free Software Foundation, Inc. |
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This file is part of the MPFR Library. |
This file is part of the MPFR Library. |
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The MPFR Library is free software; you can redistribute it and/or modify |
The MPFR 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 MPFR Library is distributed in the hope that it will be useful, but |
The MPFR 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 MPFR Library; see the file COPYING.LIB. If not, write to |
along with the MPFR 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 23 MA 02111-1307, USA. */ |
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Line 23 MA 02111-1307, USA. */ |
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#include "gmp.h" |
#include "gmp.h" |
#include "gmp-impl.h" |
#include "gmp-impl.h" |
#include "mpfr.h" |
#include "mpfr.h" |
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#include "mpfr-impl.h" |
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void |
int |
#if __STDC__ |
mpfr_set_prec (mpfr_ptr x, mp_prec_t p) |
mpfr_set_prec (mpfr_t x, unsigned long int p) |
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#else |
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mpfr_set_prec (x, p) |
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mpfr_t x; |
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unsigned long int p; |
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#endif |
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{ |
{ |
unsigned long xsize; |
mp_size_t xsize; |
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if (p==0) { |
MPFR_ASSERTN(p >= MPFR_PREC_MIN && p <= MPFR_PREC_MAX); |
printf("*** cannot set precision to 0 bits\n"); exit(1); |
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} |
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xsize = (p - 1)/BITS_PER_MP_LIMB + 1; /* new limb size */ |
xsize = (p - 1) / BITS_PER_MP_LIMB + 1; /* new limb size */ |
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if (xsize > ABSSIZE(x)) { |
if (xsize > MPFR_ABSSIZE(x)) |
x -> _mp_d = (mp_ptr) (*_mp_reallocate_func) |
{ |
(x -> _mp_d, ABSSIZE(x)*BYTES_PER_MP_LIMB, xsize * BYTES_PER_MP_LIMB); |
MPFR_MANT(x) = (mp_ptr) (*__gmp_reallocate_func) |
SIZE(x) = xsize; /* new number of allocated limbs */ |
(MPFR_MANT(x), (size_t) MPFR_ABSSIZE(x) * BYTES_PER_MP_LIMB, |
} |
(size_t) xsize * BYTES_PER_MP_LIMB); |
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MPFR_SIZE(x) = xsize; /* new number of allocated limbs */ |
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} |
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x -> _mp_prec = p; |
MPFR_PREC(x) = p; |
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MPFR_SET_NAN(x); /* initializes to NaN */ |
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return MPFR_MANT(x) == NULL; |
} |
} |
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unsigned long int |
mp_prec_t |
#if __STDC__ |
mpfr_get_prec (mpfr_srcptr x) |
mpfr_get_prec (mpfr_t x) |
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#else |
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mpfr_get_prec (x) |
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mpfr_t x; |
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#endif |
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{ |
{ |
return x -> _mp_prec; |
return MPFR_PREC(x); |
} |
} |