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Annotation of OpenXM_contrib/gmp/mpq/set_si.c, Revision 1.1.1.1

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: }