Scheme_Object *scheme_rational_power(const Scheme_Object *o, const Scheme_Object *p)
{
double b, e, v;
if (((Scheme_Rational *)p)->denom == one) {
Scheme_Object *a[2], *n;
a[0] = ((Scheme_Rational *)o)->num;
a[1] = ((Scheme_Rational *)p)->num;
n = scheme_expt(2, a);
a[0] = ((Scheme_Rational *)o)->denom;
return make_rational(n, scheme_expt(2, a), 0);
}
if (scheme_is_rational_positive(o)) {
b = scheme_rational_to_double(o);
e = scheme_rational_to_double(p);
v = pow(b, e);
#ifdef USE_SINGLE_FLOATS_AS_DEFAULT
return scheme_make_float(v);
#else
return scheme_make_double(v);
#endif
} else {
return scheme_complex_power(scheme_real_to_complex(o),
scheme_real_to_complex(p));
}
}
Scheme_Object *scheme_rational_sqrt(const Scheme_Object *o)
{
Scheme_Rational *r = (Scheme_Rational *)o;
Scheme_Object *n, *d;
double v;
n = scheme_integer_sqrt(r->num);
if (!SCHEME_DBLP(n)) {
d = scheme_integer_sqrt(r->denom);
if (!SCHEME_DBLP(d))
return make_rational(n, d, 0);
}
v = sqrt(scheme_rational_to_double(o));
#ifdef USE_SINGLE_FLOATS_AS_DEFAULT
return scheme_make_float(v);
#else
return scheme_make_double(v);
#endif
}
/**
* Convert a Scheme object to a GVariant that will serve as one of
* the parameters of a call go g_dbus_proxy_call_.... Returns NULL
* if it is unable to do the conversion.
*/
static GVariant *
scheme_object_to_parameter (Scheme_Object *obj, gchar *type)
{
gchar *str; // A temporary string
// Special case: Array of bytes
if (g_strcmp0 (type, "ay") == 0)
{
if (SCHEME_BYTE_STRINGP (obj))
{
return g_variant_new_fixed_array (G_VARIANT_TYPE_BYTE,
SCHEME_BYTE_STR_VAL (obj),
SCHEME_BYTE_STRLEN_VAL (obj),
sizeof (guchar));
} // if it's a byte string
} // array of bytes
// Handle normal cases
switch (type[0])
{
// Arrays
case 'a':
return scheme_object_to_array (obj, type);
// Doubles
case 'd':
if (SCHEME_DBLP (obj))
return g_variant_new ("d", SCHEME_DBL_VAL (obj));
else if (SCHEME_FLTP (obj))
return g_variant_new ("d", (double) SCHEME_FLT_VAL (obj));
else if (SCHEME_INTP (obj))
return g_variant_new ("d", (double) SCHEME_INT_VAL (obj));
else if (SCHEME_RATIONALP (obj))
return g_variant_new ("d", (double) scheme_rational_to_double (obj));
else
return NULL;
// 32 bit integers
case 'i':
if (SCHEME_INTP (obj))
return g_variant_new ("i", (int) SCHEME_INT_VAL (obj));
else if (SCHEME_DBLP (obj))
return g_variant_new ("i", (int) SCHEME_DBL_VAL (obj));
else if (SCHEME_FLTP (obj))
return g_variant_new ("i", (int) SCHEME_FLT_VAL (obj));
else if (SCHEME_RATIONALP (obj))
return g_variant_new ("i", (int) scheme_rational_to_double (obj));
else
return NULL;
// Strings
case 's':
str = scheme_object_to_string (obj);
if (str == NULL)
return NULL;
return g_variant_new ("s", str);
// 32 bit unsigned integers
case 'u':
if (SCHEME_INTP (obj))
return g_variant_new ("u", (unsigned int) SCHEME_INT_VAL (obj));
else
return NULL;
// Everything else is currently unsupported
default:
return NULL;
} // switch
} // scheme_object_to_parameter