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from cpython cimport Py_INCREF
from cpython.tuple cimport PyTuple_New, PyTuple_SET_ITEM
from .. import writer
cdef object MAX_UINT64 = writer.MAX_UINT64
cdef object MAX_INT64 = writer.MAX_INT64
def int128_from_quads(quad_items, unsigned long long n_items):
cdef unsigned int factor = 2
items = PyTuple_New(n_items)
cdef unsigned long long i, ix
cdef object item
for i in range(n_items):
ix = factor * i
if quad_items[ix + 1] > MAX_INT64:
item = (
-((MAX_UINT64 - quad_items[ix + 1]) << 64)
- (MAX_UINT64 - quad_items[ix])
- 1
)
else:
item = (quad_items[ix + 1] << 64) + quad_items[ix]
Py_INCREF(item)
PyTuple_SET_ITEM(items, i, item)
return items
def int128_to_quads(items, unsigned long long n_items):
cdef unsigned int factor = 2
quad_items = PyTuple_New(n_items * factor)
cdef unsigned long long i, ix
cdef object x, item
for i in range(n_items):
ix = factor * i
x = items[i]
if x < 0:
x = -x - 1
item = MAX_UINT64 - x & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix, item)
item = MAX_UINT64 - (x >> 64) & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix + 1, item)
else:
item = x & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix, item)
item = (x >> 64) & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix + 1, item)
return quad_items
def uint128_from_quads(quad_items, unsigned long long n_items):
cdef unsigned int factor = 2
items = PyTuple_New(n_items)
cdef unsigned long long i, ix
cdef object item
for i in range(n_items):
ix = factor * i
item = (quad_items[ix + 1] << 64) + quad_items[ix]
Py_INCREF(item)
PyTuple_SET_ITEM(items, i, item)
return items
def uint128_to_quads(items, unsigned long long n_items):
cdef unsigned int factor = 2
quad_items = PyTuple_New(n_items * factor)
cdef unsigned long long i, ix
cdef object x, item
for i in range(n_items):
ix = factor * i
x = items[i]
item = x & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix, item)
item = (x >> 64) & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix + 1, item)
return quad_items
# 256 bits
def int256_from_quads(quad_items, unsigned long long n_items):
cdef unsigned int factor = 4
items = PyTuple_New(n_items)
cdef unsigned long long i, ix
cdef object item
for i in range(n_items):
ix = factor * i
if quad_items[ix + 3] > MAX_INT64:
item = (
-((MAX_UINT64 - quad_items[ix + 3]) << 192)
-((MAX_UINT64 - quad_items[ix + 2]) << 128)
-((MAX_UINT64 - quad_items[ix + 1]) << 64)
- (MAX_UINT64 - quad_items[ix])
- 1
)
else:
item = (
(quad_items[ix + 3] << 192) +
(quad_items[ix + 2] << 128) +
(quad_items[ix + 1] << 64) +
quad_items[ix]
)
Py_INCREF(item)
PyTuple_SET_ITEM(items, i, item)
return items
def int256_to_quads(items, unsigned long long n_items):
cdef unsigned int factor = 4
quad_items = PyTuple_New(n_items * factor)
cdef unsigned long long i, ix
cdef object x, item
for i in range(n_items):
ix = factor * i
x = items[i]
if x < 0:
x = -x - 1
item = MAX_UINT64 - x & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix, item)
item = MAX_UINT64 - (x >> 64) & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix + 1, item)
item = MAX_UINT64 - (x >> 128) & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix + 2, item)
item = MAX_UINT64 - (x >> 192) & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix + 3, item)
else:
item = x & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix, item)
item = (x >> 64) & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix + 1, item)
item = (x >> 128) & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix + 2, item)
item = (x >> 192) & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix + 3, item)
return quad_items
def uint256_from_quads(quad_items, unsigned long long n_items):
cdef unsigned int factor = 4
items = PyTuple_New(n_items)
cdef unsigned long long i, ix
cdef object item
for i in range(n_items):
ix = factor * i
item = (
(quad_items[ix + 3] << 192) +
(quad_items[ix + 2] << 128) +
(quad_items[ix + 1] << 64) +
quad_items[ix]
)
Py_INCREF(item)
PyTuple_SET_ITEM(items, i, item)
return items
def uint256_to_quads(items, unsigned long long n_items):
cdef unsigned int factor = 4
quad_items = PyTuple_New(n_items * factor)
cdef unsigned long long i, ix
cdef object x, item
for i in range(n_items):
ix = factor * i
x = items[i]
item = x & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix, item)
item = (x >> 64) & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix + 1, item)
item = (x >> 128) & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix + 2, item)
item = (x >> 192) & MAX_UINT64
Py_INCREF(item)
PyTuple_SET_ITEM(quad_items, ix + 3, item)
return quad_items
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