Return to tlog2.c CVS log

Up to [local] / OpenXM_contrib / gmp / mpfr / tests

Annotation of OpenXM_contrib/gmp/mpfr/tests/tlog2.c, Revision 1.1

1.1     ! maekawa     1: /* Test file for mpfr_log2.
        !             2:
        !             3: Copyright (C) 1999 PolKA project, Inria Lorraine and Loria
        !             4:
        !             5: This file is part of the MPFR Library.
        !             6:
        !             7: The MPFR Library is free software; you can redistribute it and/or modify
        !             8: it under the terms of the GNU Library General Public License as published by
        !             9: the Free Software Foundation; either version 2 of the License, or (at your
        !            10: option) any later version.
        !            11:
        !            12: The MPFR 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 Library General Public
        !            15: License for more details.
        !            16:
        !            17: You should have received a copy of the GNU Library General Public License
        !            18: along with the MPFR 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 <stdlib.h>
        !            23: #include "gmp.h"
        !            24: #include "mpfr.h"
        !            25:
        !            26: /* tlog2 [prec] [rnd] [0 = no print] */
        !            27:
        !            28: int main(argc, argv) int argc; char *argv[];
        !            29: {
        !            30:   mpfr_t x; int p; unsigned char rnd;
        !            31:
        !            32:   p = (argc>1) ? atoi(argv[1]) : 53;
        !            33:   rnd = (argc>2) ? atoi(argv[2]) : GMP_RNDZ;
        !            34:   mpfr_init2(x, p);
        !            35:   mpfr_log2(x, rnd);
        !            36:   if (argc>=2) {
        !            37:     printf("log(2)="); mpfr_out_str(stdout, 10, 0, x, rnd); putchar('\n');
        !            38:   }
        !            39:   else if (mpfr_get_d(x) != 6.9314718055994530941e-1)  {
        !            40:     fprintf(stderr, "mpfr_log2 failed for prec=53\n"); exit(1);
        !            41:   }
        !            42:   mpfr_clear(x);
        !            43:   exit (0);
        !            44: }