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Finite-Difference Hyperbolic-Parabolic PDE Solver on Cartesian Grids
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math_ops.h
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1 
6 #ifndef _MATH_OPS_H_
7 #define _MATH_OPS_H_
8 
9 #include <math.h>
10 
14 #define min(a,b) ((a)<(b)?(a):(b))
15 
18 #define max(a,b) ((a)>(b)?(a):(b))
19 
23 #define min3(a,b,c) min(min((a),(b)),min((b),(c)))
24 
27 #define max3(a,b,c) max(max((a),(b)),max((b),(c)))
28 
32 #define absolute(a) ((a)<0?-(a):(a))
33 
37 #define raiseto(x,a) (exp((a)*log(x)))
38 
42 #define raiseto_int(y,x,a) \
43  { \
44  int arraycounter; \
45  y = x; \
46  for (arraycounter=1; arraycounter<a; arraycounter++) { \
47  y *= x; \
48  } \
49  }
50 
54 #define sign(a) ((a)<0?-1.0:1.0)
55 
56 #endif