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Annotation of OpenXM/src/kan96xx/gmp-2.0.2-ssh-2/mpz/set_f.c, Revision 1.1

1.1     ! takayama    1: /* mpz_set_f (dest_integer, src_float) -- Assign DEST_INTEGER from SRC_FLOAT.
        !             2:
        !             3: Copyright (C) 1996 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 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 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 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 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 "gmp.h"
        !            23: #include "gmp-impl.h"
        !            24:
        !            25: void
        !            26: #if __STDC__
        !            27: mpz_set_f (mpz_ptr w, mpf_srcptr u)
        !            28: #else
        !            29: mpz_set_f (w, u)
        !            30:      mpz_ptr w;
        !            31:      mpf_srcptr u;
        !            32: #endif
        !            33: {
        !            34:   mp_ptr wp, up;
        !            35:   mp_size_t usize, size;
        !            36:   mp_exp_t exp;
        !            37:
        !            38:   usize = SIZ (u);
        !            39:   size = ABS (usize);
        !            40:   exp = EXP (u);
        !            41:
        !            42:   if (w->_mp_alloc < exp)
        !            43:     _mpz_realloc (w, exp);
        !            44:
        !            45:   wp = w->_mp_d;
        !            46:   up = u->_mp_d;
        !            47:
        !            48:   if (exp <= 0)
        !            49:     {
        !            50:       SIZ (w) = 0;
        !            51:       return;
        !            52:     }
        !            53:   if (exp < size)
        !            54:     {
        !            55:       MPN_COPY (wp, up + size - exp, exp);
        !            56:     }
        !            57:   else
        !            58:     {
        !            59:       MPN_ZERO (wp, exp - size);
        !            60:       MPN_COPY (wp + exp - size, up, size);
        !            61:     }
        !            62:
        !            63:   w->_mp_size = usize >= 0 ? exp : -exp;
        !            64: }