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/* Test mpz_pow_ui and mpz_ui_pow_ui.
Copyright 1997, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP 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 3 of the License, or (at your
option) any later version.
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
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 GNU MP Library. If not, see http://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "tests.h"
void
check_one (mpz_srcptr want, mpz_srcptr base, unsigned long exp)
{
mpz_t got;
mpz_init (got);
MPZ_CHECK_FORMAT (want);
mpz_pow_ui (got, base, exp);
if (mpz_cmp (got, want))
{
printf ("mpz_pow_ui wrong\n");
mpz_trace (" base", base);
printf (" exp = %lu (0x%lX)\n", exp, exp);
mpz_trace (" got ", got);
mpz_trace (" want", want);
abort ();
}
mpz_set (got, base);
mpz_pow_ui (got, got, exp);
if (mpz_cmp (got, want))
{
printf ("mpz_pow_ui wrong\n");
mpz_trace (" base", base);
printf (" exp = %lu (0x%lX)\n", exp, exp);
mpz_trace (" got ", got);
mpz_trace (" want", want);
abort ();
}
if (mpz_fits_ulong_p (base))
{
unsigned long base_u = mpz_get_ui (base);
mpz_ui_pow_ui (got, base_u, exp);
if (mpz_cmp (got, want))
{
printf ("mpz_ui_pow_ui wrong\n");
printf (" base=%lu (0x%lX)\n", base_u, base_u);
printf (" exp = %lu (0x%lX)\n", exp, exp);
mpz_trace (" got ", got);
mpz_trace (" want", want);
abort ();
}
}
mpz_clear (got);
}
void
check_base (mpz_srcptr base)
{
unsigned long exp;
mpz_t want;
mpz_init (want);
mpz_set_ui (want, 1L);
for (exp = 0; exp < 20; exp++)
{
check_one (want, base, exp);
mpz_mul (want, want, base);
}
mpz_clear (want);
}
void
check_various (void)
{
static const struct {
const char *base;
} data[] = {
{ "0" },
{ "1" },
{ "2" },
{ "3" },
{ "4" },
{ "5" },
{ "6" },
{ "10" },
{ "15" },
{ "16" },
{ "0x1F" },
{ "0xFF" },
{ "0x1001" },
{ "0xFFFF" },
{ "0x10000001" },
{ "0x1000000000000001" },
/* actual size closest to estimate */
{ "0xFFFFFFFF" },
{ "0xFFFFFFFFFFFFFFFF" },
/* same after rshift */
{ "0xFFFFFFFF0" },
{ "0xFFFFFFFF00" },
{ "0xFFFFFFFFFFFFFFFF0" },
{ "0xFFFFFFFFFFFFFFFF00" },
/* change from 2 limbs to 1 after rshift */
{ "0x180000000" },
{ "0x18000000000000000" },
/* change from 3 limbs to 2 after rshift */
{ "0x18000000100000000" },
{ "0x180000000000000010000000000000000" },
/* handling of absolute value */
{ "-0x80000000" },
{ "-0x8000000000000000" },
/* low zero limb, and size>2, checking argument overlap detection */
{ "0x3000000000000000300000000000000030000000000000000" },
};
mpz_t base;
int i;
mpz_init (base);
for (i = 0; i < numberof (data); i++)
{
mpz_set_str_or_abort (base, data[i].base, 0);
check_base (base);
}
mpz_clear (base);
}
void
check_random (int reps)
{
mpz_t base, want;
mp_size_t base_size;
int i;
unsigned long size_range, exp;
gmp_randstate_ptr rands = RANDS;
mpz_init (base);
mpz_init (want);
for (i = 0; i < reps; i++)
{
/* exponentially random 0 to 2^13 bits for base */
mpz_urandomb (want, rands, 32);
size_range = mpz_get_ui (want) % 12 + 2;
mpz_urandomb (want, rands, size_range);
base_size = mpz_get_ui (want);
mpz_rrandomb (base, rands, base_size);
/* randomly signed base */
mpz_urandomb (want, rands, 2);
if ((mpz_get_ui (want) & 1) != 0)
mpz_neg (base, base);
/* random 5 bits for exponent */
mpz_urandomb (want, rands, 5L);
exp = mpz_get_ui (want);
refmpz_pow_ui (want, base, exp);
check_one (want, base, exp);
}
mpz_clear (base);
mpz_clear (want);
}
int
main (int argc, char **argv)
{
int reps = 5000;
/* dummy call to drag in refmpn.o for testing mpz/n_pow_ui.c with
refmpn_mul_2 */
refmpn_zero_p (NULL, (mp_size_t) 0);
tests_start ();
mp_trace_base = -16;
if (argc == 2)
reps = atoi (argv[1]);
check_various ();
check_random (reps);
tests_end ();
exit (0);
}
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