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"""
Type wrangling utility functions.
"""
from .constants import *
from .mechanisms import *
cdef CK_BYTE_buffer(length):
"""Make a buffer for `length` CK_BYTEs."""
return array(shape=(length,), itemsize=sizeof(CK_BYTE), format='B')
cdef CK_ULONG_buffer(length):
"""Make a buffer for `length` CK_ULONGs."""
return array(shape=(length,), itemsize=sizeof(CK_ULONG), format='L')
cdef bytes _pack_attribute(key, value):
"""Pack a Attribute value into a bytes array."""
try:
pack, _ = ATTRIBUTE_TYPES[key]
return pack(value)
except KeyError:
raise NotImplementedError("Can't pack this %s. "
"Expand ATTRIBUTE_TYPES!" % key)
cdef _unpack_attributes(key, value):
"""Unpack a Attribute bytes array into a Python value."""
try:
_, unpack = ATTRIBUTE_TYPES[key]
return unpack(bytes(value))
except KeyError:
raise NotImplementedError("Can't unpack this %s. "
"Expand ATTRIBUTE_TYPES!" % key)
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