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