1 krisbash 1.1 /*
 2              **==============================================================================
 3              **
 4              ** Open Management Infrastructure (OMI)
 5              **
 6              ** Copyright (c) Microsoft Corporation
 7              ** 
 8              ** Licensed under the Apache License, Version 2.0 (the "License"); you may not 
 9              ** use this file except in compliance with the License. You may obtain a copy 
10              ** of the License at 
11              **
12              **     http://www.apache.org/licenses/LICENSE-2.0 
13              **
14              ** THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15              ** KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED 
16              ** WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
17              ** MERCHANTABLITY OR NON-INFRINGEMENT. 
18              **
19              ** See the Apache 2 License for the specific language governing permissions 
20              ** and limitations under the License.
21              **
22 krisbash 1.1 **==============================================================================
23              */
24              
25              #include <math.h>
26              
27              #ifndef _pal_math_h
28              #define _pal_math_h
29              
30              #include <pal/palcommon.h>
31              
32              #if __STDC_VERSION__ >= 199901L
33              #   define PAL_ISNAN(x) (isnan(x))
34              #   define PAL_ISINF(x) (isinf(x))
35              #   define PAL_NAN() (NAN)
36              #   define PAL_INF() (INFINITY)
37              #else
38                  PAL_INLINE int PAL_ISNAN(double x)
39                  {
40                      return (x != x);
41                  }
42                  PAL_INLINE int PAL_ISINF(double x)
43 krisbash 1.1     {
44                      return (!PAL_ISNAN(x) && PAL_ISNAN(x - x));
45                  }
46                  PAL_INLINE double PAL_NAN(void)
47                  {
48                      double zero = 0.0;
49                      return 0.0 / ((zero - zero) * zero);
50                  }
51                  PAL_INLINE double PAL_INF(void)
52                  {
53                      double zero = 0.0;
54                      return 1.0 / ((zero - zero) * zero);
55                  }
56              #endif
57              
58              #endif /* _pal_math_h */