2 * Generally useful stuff.
22 #include <gsl/gsl_vector.h>
23 #include <gsl/gsl_matrix.h>
24 #include <gsl/gsl_blas.h>
25 #include <gsl/gsl_linalg.h>
29 double hypotD(const double p[D3], const double q[D3]);
30 double hypotD2(const double p[D3], const double q[D3]);
31 double hypotD2plus(const double p[D3], const double q[D3], double add);
33 double magnD(const double pq[D3]);
34 void xprod(double r[D3], const double a[D3], const double b[D3]);
36 void flushoutput(void);
37 void diee(const char *what);
39 void libdie(const char *lib, int l, const char *str);
40 #define XA(w) ((w) ? (void)0 : libdie("X", __LINE__, #w))
42 void gsldie(int l, const char *what, int status);
43 #define GA(w) ({int _ga_r= (w); if (w) gsldie(__LINE__,#w,_ga_r);})
45 #define FOR_COORD(k) \
46 for ((k)=0; (k)<D3; (k)++)
48 #define K FOR_COORD(k)
50 #define GSL_VECTOR(x) gsl_vector x##_gsl= { D3,1,&x[0] };
51 #define GSL_MATRIX(x) gsl_matrix x##_gsl= { D3,D3,D3,&x[0][0] };
53 #define MIN(a,b) ((a) <= (b) ? (a) : (b))
54 #define MAX(a,b) ((a) >= (b) ? (a) : (b))
59 # define fma_fast(f1,f2,t) ((f1)*(f2)+(t))
61 #define ffsqa(factor,term) fma_fast((factor),(factor),(term))