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Annotation of OpenXM_contrib/gmp/mpfr/copysign.c, Revision 1.1.1.1

1.1       ohara       1: /* mpfr_copysign -- Produce a value with the magnitude of x and sign of y
                      2:
                      3: Copyright 2001, 2002 Free Software Foundation.
                      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 "gmp.h"
                     23: #include "gmp-impl.h"
                     24: #include "mpfr.h"
                     25: #include "mpfr-impl.h"
                     26:
                     27:  /* The computation of z with magnitude of x and sign of y
                     28:
                     29:     z = sign(y) * abs(x)
                     30:  */
                     31:
                     32: int
                     33: mpfr_copysign (mpfr_ptr z, mpfr_srcptr x ,mpfr_srcptr y , mp_rnd_t rnd_mode)
                     34: {
                     35:   if (MPFR_IS_NAN(y))
                     36:     {
                     37:       MPFR_SET_NAN(z);
                     38:       MPFR_RET_NAN;
                     39:     }
                     40:   else
                     41:     return mpfr_set4(z, x, rnd_mode, MPFR_SIGN(y));
                     42: }