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#include <stdio.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "mpfr.h"
void
#if __STDC__
mpfr_set_prec (mpfr_t x, unsigned long int p, unsigned char rnd_mode)
#else
mpfr_set_prec (x, p, rnd_mode)
mpfr_t x;
unsigned long int p;
unsigned char rnd_mode;
#endif
{
unsigned long xsize,oldp,oldsize; mp_limb_t *old;
if (p==0) {
printf("*** cannot set precision to 0 bits\n"); exit(1);
}
oldp = x -> _mp_prec;
oldsize = (oldp-1)/BITS_PER_MP_LIMB + 1;
if (SIGN(x)<0) oldsize = oldsize ^ (1<<31);
xsize = (p - 1)/BITS_PER_MP_LIMB + 1; /* new limb size */
old = x -> _mp_d;
x -> _mp_d = (mp_ptr) (*_mp_allocate_func)
(xsize * BYTES_PER_MP_LIMB);
x -> _mp_prec = p;
mpfr_round_raw(x -> _mp_d, old, rnd_mode, oldsize, p);
SIZE(x) = (SIGN(x)>0) ? xsize : (xsize ^ (1<<31));
(*_mp_free_func) (old, 1 + ((oldp-1)>>3));
}
unsigned long int
#if __STDC__
mpfr_get_prec (mpfr_t x)
#else
mpfr_set_prec (x)
mpfr_t x;
#endif
{
return x -> _mp_prec;
}
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