2 * Generally useful stuff.
12 #include <sys/types.h>
26 #include <gsl/gsl_vector.h>
27 #include <gsl/gsl_matrix.h>
28 #include <gsl/gsl_blas.h>
29 #include <gsl/gsl_linalg.h>
30 #include <gsl/gsl_interp.h>
34 double hypotD(const double p[D3], const double q[D3]);
35 double hypotD2(const double p[D3], const double q[D3]);
36 double hypotD2plus(const double p[D3], const double q[D3], double add);
38 double magnD(const double pq[D3]);
39 double magnD2(const double pq[D3]);
40 void xprod(double r[D3], const double a[D3], const double b[D3]);
41 double dotprod(const double a[D3], const double b[D3]);
42 void xprod_norm(double r[D3], const double a[D3], const double b[D3],
43 double one, double absepsilon);
44 void normalise(double v[D3], double one, double absepsilon);
46 void flushoutput(void);
47 void diee(const char *what);
48 void fail(const char *emsg);
50 void libdie(const char *lib, int l, const char *str);
51 #define XA(w) ((w) ? (void)0 : libdie("X", __LINE__, #w))
53 void gsldie(int l, const char *what, int status);
54 #define GA(w) ({int _ga_r= (w); if (w) gsldie(__LINE__,#w,_ga_r);})
56 #define FOR_COORD(k) \
57 for ((k)=0; (k)<D3; (k)++)
59 #define K FOR_COORD(k)
61 #define GSL_VECTOR(x) gsl_vector x##_gsl= { D3,1,&x[0] };
62 #define GSL_MATRIX(x) gsl_matrix x##_gsl= { D3,D3,D3,&x[0][0] };
64 #define MIN(a,b) ((a) <= (b) ? (a) : (b))
65 #define MAX(a,b) ((a) >= (b) ? (a) : (b))
70 # define fma_fast(f1,f2,t) ((f1)*(f2)+(t))
72 #define ffsqa(factor,term) fma_fast((factor),(factor),(term))