contrib/mpfr/comparisons.c

   1 /* comparison predicates
   2
   3 Copyright 2002, 2003, 2004, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
   4 Contributed by the Arenaire and Cacao projects, INRIA.
   5
   6 This file is part of the GNU MPFR Library.
   7
   8 The GNU MPFR Library is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU Lesser General Public License as published by
  10 the Free Software Foundation; either version 2.1 of the License, or (at your
  11 option) any later version.
  12
  13 The GNU MPFR 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 Lesser General Public
  16 License for more details.
  17
  18 You should have received a copy of the GNU Lesser General Public License
  19 along with the GNU MPFR Library; see the file COPYING.LIB.  If not, write to
  20 the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  21 MA 02110-1301, USA. */
  22
  23 #include "mpfr-impl.h"
  24
  25 /* Note: these functions currently use mpfr_cmp; they could have their
  26    own code to be faster. */
  27
  28 /*                          =     <     >     unordered
  29  * mpfr_greater_p           0     0     1     0
  30  * mpfr_greaterequal_p      1     0     1     0
  31  * mpfr_less_p              0     1     0     0
  32  * mpfr_lessequal_p         1     1     0     0
  33  * mpfr_lessgreater_p       0     1     1     0
  34  * mpfr_equal_p             1     0     0     0
  35  * mpfr_unordered_p         0     0     0     1
  36  */
  37
  38 int
  39 mpfr_greater_p (mpfr_srcptr x, mpfr_srcptr y)
  40 {
  41   return MPFR_IS_NAN(x) || MPFR_IS_NAN(y) ? 0 : (mpfr_cmp (x, y) > 0);
  42 }
  43
  44 int
  45 mpfr_greaterequal_p (mpfr_srcptr x, mpfr_srcptr y)
  46 {
  47   return MPFR_IS_NAN(x) || MPFR_IS_NAN(y) ? 0 : (mpfr_cmp (x, y) >= 0);
  48 }
  49
  50 int
  51 mpfr_less_p (mpfr_srcptr x, mpfr_srcptr y)
  52 {
  53   return MPFR_IS_NAN(x) || MPFR_IS_NAN(y) ? 0 : (mpfr_cmp (x, y) < 0);
  54 }
  55
  56 int
  57 mpfr_lessequal_p (mpfr_srcptr x, mpfr_srcptr y)
  58 {
  59   return MPFR_IS_NAN(x) || MPFR_IS_NAN(y) ? 0 : (mpfr_cmp (x, y) <= 0);
  60 }
  61
  62 int
  63 mpfr_lessgreater_p (mpfr_srcptr x, mpfr_srcptr y)
  64 {
  65   return MPFR_IS_NAN(x) || MPFR_IS_NAN(y) ? 0 : (mpfr_cmp (x, y) != 0);
  66 }
  67
  68 int
  69 mpfr_equal_p (mpfr_srcptr x, mpfr_srcptr y)
  70 {
  71   return MPFR_IS_NAN(x) || MPFR_IS_NAN(y) ? 0 : (mpfr_cmp (x, y) == 0);
  72 }
  73
  74 int
  75 mpfr_unordered_p (mpfr_srcptr x, mpfr_srcptr y)
  76 {
  77   return MPFR_IS_NAN(x) || MPFR_IS_NAN(y);
  78 }