6 // Toss a runtime error for any NaN or Inf values produced. Note that
7 // this assumes an IEEE 754 format.
8 #define VALIDATE(r) (valid(r.num) ? (r) : die(c, __FUNCTION__+2))
10 static int valid(double d)
12 union { double d; unsigned long long ull; } u;
14 return ((u.ull >> 52) & 0x7ff) != 0x7ff;
17 static naRef die(naContext c, const char* fn)
19 naRuntimeError(c, "floating point error in math.%s()", fn);
23 static naRef f_sin(naContext c, naRef me, int argc, naRef* args)
25 naRef a = naNumValue(argc > 0 ? args[0] : naNil());
27 naRuntimeError(c, "non numeric argument to sin()");
32 static naRef f_cos(naContext c, naRef me, int argc, naRef* args)
34 naRef a = naNumValue(argc > 0 ? args[0] : naNil());
36 naRuntimeError(c, "non numeric argument to cos()");
41 static naRef f_exp(naContext c, naRef me, int argc, naRef* args)
43 naRef a = naNumValue(argc > 0 ? args[0] : naNil());
45 naRuntimeError(c, "non numeric argument to exp()");
50 static naRef f_ln(naContext c, naRef me, int argc, naRef* args)
52 naRef a = naNumValue(argc > 0 ? args[0] : naNil());
54 naRuntimeError(c, "non numeric argument to ln()");
59 static naRef f_sqrt(naContext c, naRef me, int argc, naRef* args)
61 naRef a = naNumValue(argc > 0 ? args[0] : naNil());
63 naRuntimeError(c, "non numeric argument to sqrt()");
68 static naRef f_atan2(naContext c, naRef me, int argc, naRef* args)
70 naRef a = naNumValue(argc > 0 ? args[0] : naNil());
71 naRef b = naNumValue(argc > 1 ? args[1] : naNil());
72 if(naIsNil(a) || naIsNil(b))
73 naRuntimeError(c, "non numeric argument to atan2()");
74 a.num = atan2(a.num, b.num);
78 static naCFuncItem funcs[] = {
88 naRef naInit_math(naContext c)
90 naRef ns = naGenLib(c, funcs);
91 naAddSym(c, ns, "pi", naNum(3.14159265358979323846));
92 naAddSym(c, ns, "e", naNum(2.7182818284590452354));