static long
quaternion_arrtype_hash(PyObject *o)
{
quaternion q = ((PyQuaternionScalarObject *)o)->obval;
long value = 0x456789;
value = (10000004 * value) ^ _Py_HashDouble(q.w);
value = (10000004 * value) ^ _Py_HashDouble(q.x);
value = (10000004 * value) ^ _Py_HashDouble(q.y);
value = (10000004 * value) ^ _Py_HashDouble(q.z);
if (value == -1)
value = -2;
return value;
}
/**
* helper function that returns a Python ``__hash__``.
*
* \note consistent with the equivalent tuple of floats (CPython's 'tuplehash')
*/
Py_hash_t mathutils_array_hash(const float *array, size_t array_len)
{
int i;
Py_uhash_t x; /* Unsigned for defined overflow behavior. */
Py_hash_t y;
Py_uhash_t mult;
Py_ssize_t len;
mult = _PyHASH_MULTIPLIER;
len = array_len;
x = 0x345678UL;
i = 0;
while (--len >= 0) {
y = _Py_HashDouble((double)(array[i++]));
if (y == -1)
return -1;
x = (x ^ y) * mult;
/* the cast might truncate len; that doesn't change hash stability */
mult += (Py_hash_t)(82520UL + len + len);
}
x += 97531UL;
if (x == (Py_uhash_t)-1)
x = -2;
return x;
}
static long
halftype_hash(PyObject *obj)
{
double temp;
temp = half_to_double(((PyHalfScalarObject *)obj)->obval);
return _Py_HashDouble(*((double*)&temp));
}
static long
complex_hash(PyComplexObject *v)
{
long hashreal, hashimag, combined;
hashreal = _Py_HashDouble(v->cval.real);
if (hashreal == -1)
return -1;
hashimag = _Py_HashDouble(v->cval.imag);
if (hashimag == -1)
return -1;
/* Note: if the imaginary part is 0, hashimag is 0 now,
* so the following returns hashreal unchanged. This is
* important because numbers of different types that
* compare equal must have the same hash value, so that
* hash(x + 0*j) must equal hash(x).
*/
combined = hashreal + 1000003 * hashimag;
if (combined == -1)
combined = -2;
return combined;
}
