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Annotation of OpenXM_contrib/gmp/mpfr/tests/tlog10.c, Revision 1.1.1.1

1.1       ohara       1: /* Test file for mpfr_log10.
                      2:
                      3: Copyright 2001, 2002 Free Software Foundation.
                      4: Adapted from tsinh.c.
                      5:
                      6: This file is part of the MPFR Library.
                      7:
                      8: The MPFR Library is free software; you can redistribute it and/or modify
                      9: it under the terms of the GNU Lesser General Public License as published by
                     10: the Free Software Foundation; either version 2.1 of the License, or (at your
                     11: option) any later version.
                     12:
                     13: The MPFR Library is distributed in the hope that it will be useful, but
                     14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     15: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
                     16: License for more details.
                     17:
                     18: You should have received a copy of the GNU Lesser General Public License
                     19: along with the MPFR Library; see the file COPYING.LIB.  If not, write to
                     20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     21: MA 02111-1307, USA. */
                     22:
                     23: #include <stdio.h>
                     24: #include <stdlib.h>
                     25: #include "gmp.h"
                     26: #include "mpfr.h"
                     27: #include "mpfr-test.h"
                     28:
                     29: #define TEST_FUNCTION mpfr_log10
                     30: #include "tgeneric.c"
                     31:
                     32: int
                     33: main (int argc, char *argv[])
                     34: {
                     35:   mpfr_t x, y;
                     36:   unsigned int n;
                     37:
                     38:   test_generic (2, 100, 100);
                     39:
                     40:   /* check log10(10^n)=n */
                     41:   mpfr_init2 (x, 53);
                     42:   mpfr_init2 (y, 53);
                     43:   mpfr_set_ui (x, 1, GMP_RNDN);
                     44:
                     45:   for (n=1; n<=15; n++)
                     46:     {
                     47:       mpfr_mul_ui (x, x, 10, GMP_RNDN); /* x = 10^n */
                     48:       mpfr_log10 (y, x, GMP_RNDN);
                     49:       if (mpfr_get_d1 (y) != (double) n)
                     50:         {
                     51:           fprintf (stderr, "log10(10^n) <> n for n=%u\n", n);
                     52:           exit (1);
                     53:         }
                     54:     }
                     55:
                     56:   mpfr_clear (x);
                     57:   mpfr_clear (y);
                     58:
                     59:   return 0;
                     60: }