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/* Test file for mpfr_custom_*
Copyright 2005 Free Software Foundation.
This file is part of the MPFR Library.
The MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version.
The MPFR Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
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
the Free Software Foundation, Inc., 51 Franklin Place, Fifth Floor, Boston,
MA 02110-1301, USA. */
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include "mpfr-test.h"
#define BUFFER_SIZE 1000
#define PREC_TESTED 200
char Buffer[BUFFER_SIZE];
char *stack = Buffer;
mp_prec_t p = PREC_TESTED;
#define ALIGNED(s) ( ((s)+sizeof (long)-1) / sizeof (long) * sizeof (long))
static void *
new (size_t s)
{
void *p = (void*) stack;
stack += ALIGNED (s);
if (MPFR_UNLIKELY (stack > &Buffer[BUFFER_SIZE]))
{
printf ("Stack overflow.\n");
exit (1);
}
return p;
}
/* Alloc a new mpfr_t on the main stack */
static mpfr_ptr
new_mpfr (mp_prec_t p)
{
mpfr_ptr x = (mpfr_ptr) new (sizeof (mpfr_t));
void *mantissa = new (mpfr_custom_get_size (p));
mpfr_custom_init (mantissa, p);
mpfr_custom_init_set (x, 0, 0, p, mantissa);
return x;
}
/* Garbage the stack by keeping only x */
static mpfr_ptr
return_mpfr (mpfr_ptr x, char *old_stack)
{
void *mantissa = mpfr_custom_get_mantissa (x);
size_t size_mantissa = mpfr_custom_get_size (mpfr_get_prec (x));
mpfr_ptr newx;
memmove (old_stack, x, sizeof (mpfr_t));
memmove (old_stack + ALIGNED (sizeof (mpfr_t)), mantissa, size_mantissa);
newx = (mpfr_ptr) old_stack;
mpfr_custom_move (newx, old_stack + ALIGNED (sizeof (mpfr_t)));
stack = old_stack + ALIGNED (sizeof (mpfr_t)) + ALIGNED (size_mantissa);
return newx;
}
static void
test1 (void)
{
mpfr_ptr x, y;
char *org;
org = stack;
x = new_mpfr (p);
y = new_mpfr (p);
mpfr_set_ui (x, 42, GMP_RNDN);
mpfr_set_ui (y, 17, GMP_RNDN);
mpfr_add (y, x, y, GMP_RNDN);
y = return_mpfr (y, org);
if (y != x || mpfr_cmp_ui (y, 59) != 0)
{
printf ("Compact (1) failed!\n");
exit (1);
}
stack = org;
}
/* We build the MPFR variable each time it is needed */
/* a[0] is the kind, a[1] is the exponent, &a[2] is the mantissa */
static long *
dummy_new (void)
{
long *r;
r = new (ALIGNED (2*sizeof (long)) + ALIGNED (mpfr_custom_get_size (p)));
MPFR_ASSERTN (r != NULL);
(mpfr_custom_init) (&r[2], p);
r[0] = (int) MPFR_NAN_KIND;
r[1] = 0;
return r;
}
static long *
dummy_set_si (long si)
{
mpfr_t x;
long * r = dummy_new ();
(mpfr_custom_init_set) (x, 0, 0, p, &r[2]);
mpfr_set_si (x, si, GMP_RNDN);
r[0] = mpfr_custom_get_kind (x);
r[1] = mpfr_custom_get_exp (x);
return r;
}
static long *
dummy_add (long *a, long *b)
{
mpfr_t x, y, z;
long *r = dummy_new ();
mpfr_custom_init_set (x, 0, 0, p, &r[2]);
(mpfr_custom_init_set) (y, a[0], a[1], p, &a[2]);
mpfr_custom_init_set (z, b[0], b[1], p, &b[2]);
mpfr_add (x, y, z, GMP_RNDN);
r[0] = (mpfr_custom_get_kind) (x);
r[1] = (mpfr_custom_get_exp) (x);
return r;
}
static long *
dummy_compact (long *r, char *org_stack)
{
memmove (org_stack, r,
ALIGNED (2*sizeof (long)) + ALIGNED ((mpfr_custom_get_size) (p)));
return (long *) org_stack;
}
static void
test2 (void)
{
mpfr_t x;
char *org = stack;
long *a, *b, *c;
a = dummy_set_si (42);
b = dummy_set_si (17);
c = dummy_add (a, b);
c = dummy_compact (c, org);
(mpfr_custom_init_set) (x, c[0], c[1], p, &c[2]);
if (c != a || mpfr_cmp_ui (x, 59) != 0)
{
printf ("Compact (2) failed! c=%p a=%p\n", c, a);
mpfr_dump (x);
exit (1);
}
stack = org;
}
int
main (void)
{
tests_start_mpfr ();
/* We test iff long = mp_limb_t */
if (sizeof (long) == sizeof (mp_limb_t))
{
test1 ();
test2 ();
}
tests_end_mpfr ();
return 0;
}
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