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

1.1     ! ohara       1: /* Test file for mpfr_tan.
        !             2:
        !             3: Copyright 2001, 2002 Free Software Foundation, Inc.
        !             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 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 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 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 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 <stdio.h>
        !            23: #include <stdlib.h>
        !            24: #include <math.h>
        !            25: #include "gmp.h"
        !            26: #include "mpfr.h"
        !            27: #include "mpfr-impl.h"
        !            28: #include "mpfr-test.h"
        !            29:
        !            30: void check53 _PROTO ((double, double, mp_rnd_t));
        !            31:
        !            32: void
        !            33: check53 (double x, double tan_x, mp_rnd_t rnd_mode)
        !            34: {
        !            35:   mpfr_t xx, s;
        !            36:
        !            37:   mpfr_init2 (xx, 53);
        !            38:   mpfr_init2 (s, 53);
        !            39:   mpfr_set_d (xx, x, rnd_mode); /* should be exact */
        !            40:   mpfr_tan (s, xx, rnd_mode);
        !            41:   if (mpfr_get_d1 (s) != tan_x && (!isnan(tan_x) || !mpfr_nan_p(s))) {
        !            42:     fprintf (stderr, "mpfr_tan failed for x=%1.20e, rnd=%s\n", x,
        !            43:             mpfr_print_rnd_mode (rnd_mode));
        !            44:     fprintf (stderr, "mpfr_tan gives tan(x)=%1.20e, expected %1.20e\n",
        !            45:             mpfr_get_d1 (s), tan_x);
        !            46:     exit(1);
        !            47:   }
        !            48:   mpfr_clear (xx);
        !            49:   mpfr_clear (s);
        !            50: }
        !            51:
        !            52: #define TEST_FUNCTION mpfr_tan
        !            53: #include "tgeneric.c"
        !            54:
        !            55: int
        !            56: main(int argc, char *argv[])
        !            57: {
        !            58:   mpfr_t x;
        !            59:   unsigned int i;
        !            60:   unsigned int prec[10] = {14, 15, 19, 22, 23, 24, 25, 40, 41, 52};
        !            61:   unsigned int prec2[10] = {4, 5, 6, 19, 70, 95, 100, 106, 107, 108};
        !            62:
        !            63: #ifdef HAVE_INFS
        !            64:   check53 (DBL_NAN, DBL_NAN, GMP_RNDN);
        !            65:   check53 (DBL_POS_INF, DBL_NAN, GMP_RNDN);
        !            66:   check53 (DBL_NEG_INF, DBL_NAN, GMP_RNDN);
        !            67: #endif
        !            68:
        !            69:   mpfr_init (x);
        !            70:
        !            71:   mpfr_set_prec (x, 2);
        !            72:   mpfr_set_d (x, 0.5, GMP_RNDN);
        !            73:   mpfr_tan (x, x, GMP_RNDD);
        !            74:   if (mpfr_get_d1 (x) != 0.5)
        !            75:     {
        !            76:       fprintf (stderr, "mpfr_tan(0.5, GMP_RNDD) failed\n");
        !            77:       fprintf (stderr, "expected 0.5, got %f\n", mpfr_get_d1 (x));
        !            78:       exit (1);
        !            79:     }
        !            80:
        !            81:   /* check that tan(3*Pi/4) ~ -1 */
        !            82:   for (i=0; i<10; i++)
        !            83:     {
        !            84:       mpfr_set_prec (x, prec[i]);
        !            85:       mpfr_const_pi (x, GMP_RNDN);
        !            86:       mpfr_mul_ui (x, x, 3, GMP_RNDN);
        !            87:       mpfr_div_ui (x, x, 4, GMP_RNDN);
        !            88:       mpfr_tan (x, x, GMP_RNDN);
        !            89:       if (mpfr_cmp_si (x, -1))
        !            90:         {
        !            91:           fprintf (stderr, "tan(3*Pi/4) fails for prec=%u\n", prec[i]);
        !            92:           exit (1);
        !            93:         }
        !            94:     }
        !            95:
        !            96:   /* check that tan(7*Pi/4) ~ -1 */
        !            97:   for (i=0; i<10; i++)
        !            98:     {
        !            99:       mpfr_set_prec (x, prec2[i]);
        !           100:       mpfr_const_pi (x, GMP_RNDN);
        !           101:       mpfr_mul_ui (x, x, 7, GMP_RNDN);
        !           102:       mpfr_div_ui (x, x, 4, GMP_RNDN);
        !           103:       mpfr_tan (x, x, GMP_RNDN);
        !           104:       if (mpfr_cmp_si (x, -1))
        !           105:         {
        !           106:           fprintf (stderr, "tan(3*Pi/4) fails for prec=%u\n", prec2[i]);
        !           107:           exit (1);
        !           108:         }
        !           109:     }
        !           110:
        !           111:   mpfr_clear (x);
        !           112:
        !           113:   test_generic (2, 100, 100);
        !           114:
        !           115:   return 0;
        !           116: }