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: }
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