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Annotation of OpenXM_contrib/gmp/mpq/set_si.c, Revision 1.1

1.1     ! maekawa     1: /* mpq_set_si(dest,ulong_num,ulong_den) -- Set DEST to the retional number
        !             2:    ULONG_NUM/ULONG_DEN.
        !             3:
        !             4: Copyright (C) 1991, 1994, 1995 Free Software Foundation, Inc.
        !             5:
        !             6: This file is part of the GNU MP Library.
        !             7:
        !             8: The GNU MP Library is free software; you can redistribute it and/or modify
        !             9: it under the terms of the GNU Library General Public License as published by
        !            10: the Free Software Foundation; either version 2 of the License, or (at your
        !            11: option) any later version.
        !            12:
        !            13: The GNU MP 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 Library General Public
        !            16: License for more details.
        !            17:
        !            18: You should have received a copy of the GNU Library General Public License
        !            19: along with the GNU MP 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 "gmp.h"
        !            24: #include "gmp-impl.h"
        !            25:
        !            26: void
        !            27: #if __STDC__
        !            28: mpq_set_si (MP_RAT *dest, signed long int num, unsigned long int den)
        !            29: #else
        !            30: mpq_set_si (dest, num, den)
        !            31:      MP_RAT *dest;
        !            32:      signed long int num;
        !            33:      unsigned long int den;
        !            34: #endif
        !            35: {
        !            36:   unsigned long int abs_num;
        !            37:
        !            38:   abs_num = ABS (num);
        !            39:
        !            40:   if (num == 0)
        !            41:     {
        !            42:       /* Canonicalize 0/d to 0/1.  */
        !            43:       den = 1;
        !            44:       dest->_mp_num._mp_size = 0;
        !            45:     }
        !            46:   else
        !            47:     {
        !            48:       dest->_mp_num._mp_d[0] = abs_num;
        !            49:       dest->_mp_num._mp_size = num > 0 ? 1 : -1;
        !            50:     }
        !            51:
        !            52:   dest->_mp_den._mp_d[0] = den;
        !            53:   dest->_mp_den._mp_size = 1;
        !            54: }