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Annotation of OpenXM_contrib/gmp/tests/mpz/t-sizeinbase.c, Revision 1.1.1.1

1.1       ohara       1: /* Test mpz_sizeinbase.
                      2:
                      3: Copyright 2001, 2002 Free Software Foundation, Inc.
                      4:
                      5: This file is part of the GNU MP Library.
                      6:
                      7: The GNU MP Library is free software; you can redistribute it and/or modify
                      8: it under the terms of the GNU Lesser General Public License as published by
                      9: the Free Software Foundation; either version 2.1 of the License, or (at your
                     10: option) any later version.
                     11:
                     12: The GNU MP Library is distributed in the hope that it will be useful, but
                     13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
                     15: License for more details.
                     16:
                     17: You should have received a copy of the GNU Lesser General Public License
                     18: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     20: MA 02111-1307, USA. */
                     21:
                     22: #include <stdio.h>
                     23: #include <stdlib.h>
                     24: #include "gmp.h"
                     25: #include "gmp-impl.h"
                     26: #include "tests.h"
                     27:
                     28:
                     29: /* Create a fake mpz consisting of just a single 1 bit, with totbits being
                     30:    the total number of bits, inclusive of that 1 bit.  */
                     31: void
                     32: mpz_fake_bits (mpz_ptr z, unsigned long totbits)
                     33: {
                     34:   static mp_limb_t  n;
                     35:   unsigned long     zero_bits, zero_limbs;
                     36:
                     37:   zero_bits = totbits - 1;
                     38:   zero_limbs = zero_bits / GMP_NUMB_BITS;
                     39:   zero_bits %= GMP_NUMB_BITS;
                     40:
                     41:   SIZ(z) = zero_limbs + 1;
                     42:   PTR(z) = (&n) - (SIZ(z) - 1);
                     43:   n = CNST_LIMB(1) << zero_bits;
                     44:
                     45:   ASSERT_ALWAYS (mpz_sizeinbase (z, 2) == totbits);
                     46: }
                     47:
                     48:
                     49: /* This was seen to fail on a GNU/Linux powerpc32 with gcc 2.95.2,
                     50:    apparently due to a doubtful value of mp_bases[10].chars_per_bit_exactly
                     51:    (0X1.34413509F79FDP-2 whereas 0X1.34413509F79FFP-2 is believed correct).
                     52:    Presumably this is a glibc problem when gcc converts the decimal string
                     53:    in mp_bases.c, or maybe it's only a function of the rounding mode during
                     54:    compilation.  */
                     55: void
                     56: check_sample (void)
                     57: {
                     58:   unsigned long  totbits = 198096465;
                     59:   int        base = 10;
                     60:   size_t     want = 59632979;
                     61:   size_t     got;
                     62:   mpz_t      z;
                     63:
                     64:   mpz_fake_bits (z, totbits);
                     65:   got = mpz_sizeinbase (z, base);
                     66:   if (got != want)
                     67:     {
                     68:       printf ("mpz_sizeinbase\n");
                     69:       printf ("  base    %d\n",  base);
                     70:       printf ("  totbits %lu\n", totbits);
                     71:       printf ("  got     %u\n",  got);
                     72:       printf ("  want    %u\n",  want);
                     73:       abort ();
                     74:     }
                     75: }
                     76:
                     77:
                     78: int
                     79: main (void)
                     80: {
                     81:   tests_start ();
                     82:
                     83:   /* Disabled due to the bogosity of trying to fake an _mp_d pointer to
                     84:      below an object.  Has been seen to fail on a hppa system.  */
                     85:
                     86:   /* check_sample (); */
                     87:
                     88:   tests_end ();
                     89:   exit (0);
                     90: }