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 3 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. If not, see http://www.gnu.org/licenses/. */ 19 20 #include "gmp.h" 21 #include "gmp-impl.h" 22 23 24 /* Something like mpq_cmpabs_ui would be more useful for the neg/neg case, 25 and perhaps a version accepting a parameter to reverse the test, to make 26 it a tail call here. */ 27 28 int 29 _mpq_cmp_si (mpq_srcptr q, long n, unsigned long d) 30 { 31 /* need canonical sign to get right result */ 32 ASSERT (q->_mp_den._mp_size > 0); 33 34 if (q->_mp_num._mp_size >= 0) 35 { 36 if (n >= 0) 37 return _mpq_cmp_ui (q, n, d); /* >=0 cmp >=0 */ 38 else 39 return 1; /* >=0 cmp <0 */ 40 } 41 else 42 { 43 if (n >= 0) 44 return -1; /* <0 cmp >=0 */ 45 else 46 { 47 mpq_t qabs; 48 qabs->_mp_num._mp_size = ABS (q->_mp_num._mp_size); 49 qabs->_mp_num._mp_d = q->_mp_num._mp_d; 50 qabs->_mp_den._mp_size = q->_mp_den._mp_size; 51 qabs->_mp_den._mp_d = q->_mp_den._mp_d; 52 53 return - _mpq_cmp_ui (qabs, -n, d); /* <0 cmp <0 */ 54 } 55 } 56 } 57