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