Return to cmp_si.c CVS log

Up to [local] / OpenXM_contrib / gmp / mpq

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

1.1     ! ohara       1: /* _mpq_cmp_si -- compare mpq and long/ulong fraction.
        !             2:
        !             3: Copyright 2001 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 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 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 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 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:
        !            26: /* Something like mpq_cmpabs_ui would be more useful for the neg/neg case,
        !            27:    and perhaps a version accepting a parameter to reverse the test, to make
        !            28:    it a tail call here.  */
        !            29:
        !            30: int
        !            31: _mpq_cmp_si (mpq_srcptr q, long n, unsigned long d)
        !            32: {
        !            33:   /* need canonical sign to get right result */
        !            34:   ASSERT (q->_mp_den._mp_size > 0);
        !            35:
        !            36:   if (q->_mp_num._mp_size >= 0)
        !            37:     {
        !            38:       if (n >= 0)
        !            39:         return _mpq_cmp_ui (q, n, d);            /* >=0 cmp >=0 */
        !            40:       else
        !            41:         return 1;                                /* >=0 cmp <0 */
        !            42:     }
        !            43:   else
        !            44:     {
        !            45:       if (n >= 0)
        !            46:         return -1;                               /* <0 cmp >=0 */
        !            47:       else
        !            48:         {
        !            49:           mpq_t  qabs;
        !            50:           qabs->_mp_num._mp_size = ABS (q->_mp_num._mp_size);
        !            51:           qabs->_mp_num._mp_d    = q->_mp_num._mp_d;
        !            52:           qabs->_mp_den._mp_size = q->_mp_den._mp_size;
        !            53:           qabs->_mp_den._mp_d    = q->_mp_den._mp_d;
        !            54:
        !            55:           return - _mpq_cmp_ui (qabs, -n, d);    /* <0 cmp <0 */
        !            56:         }
        !            57:     }
        !            58: }