本文整理汇总了Python中ctypes.c_bool._type_方法的典型用法代码示例。如果您正苦于以下问题：Python c_bool._type_方法的具体用法？Python c_bool._type_怎么用？Python c_bool._type_使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ctypes.c_bool的用法示例。
在下文中一共展示了c_bool._type_方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: valid_ranges
# 需要导入模块: from ctypes import c_bool [as 别名]
# 或者: from ctypes.c_bool import _type_ [as 别名]
def valid_ranges(*types):
# given a sequence of numeric types, collect their _type_
# attribute, which is a single format character compatible with
# the struct module, use the struct module to calculate the
# minimum and maximum value allowed for this format.
# Returns a list of (min, max) values.
result = []
for t in types:
fmt = t._type_
size = struct.calcsize(fmt)
a = struct.unpack(fmt, ("\x00"*32)[:size])[0]
b = struct.unpack(fmt, ("\xFF"*32)[:size])[0]
c = struct.unpack(fmt, ("\x7F"+"\x00"*32)[:size])[0]
d = struct.unpack(fmt, ("\x80"+"\xFF"*32)[:size])[0]
result.append((min(a, b, c, d), max(a, b, c, d)))
return result 示例2: test_int_from_address
# 需要导入模块: from ctypes import c_bool [as 别名]
# 或者: from ctypes.c_bool import _type_ [as 别名]
def test_int_from_address(self):
from array import array
for t in signed_types + unsigned_types:
# the array module doesn't support all format codes
# (no 'q' or 'Q')
try:
array(t._type_)
except ValueError:
continue
a = array(t._type_, [100])
# v now is an integer at an 'external' memory location
v = t.from_address(a.buffer_info()[0])
self.assertEqual(v.value, a[0])
self.assertEqual(type(v), t)
# changing the value at the memory location changes v's value also
a[0] = 42
self.assertEqual(v.value, a[0]) 示例3: valid_ranges
# 需要导入模块: from ctypes import c_bool [as 别名]
# 或者: from ctypes.c_bool import _type_ [as 别名]
def valid_ranges(*types):
# given a sequence of numeric types, collect their _type_
# attribute, which is a single format character compatible with
# the struct module, use the struct module to calculate the
# minimum and maximum value allowed for this format.
# Returns a list of (min, max) values.
result = []
for t in types:
fmt = t._type_
size = struct.calcsize(fmt)
a = struct.unpack(fmt, (b"\x00"*32)[:size])[0]
b = struct.unpack(fmt, (b"\xFF"*32)[:size])[0]
c = struct.unpack(fmt, (b"\x7F"+b"\x00"*32)[:size])[0]
d = struct.unpack(fmt, (b"\x80"+b"\xFF"*32)[:size])[0]
result.append((min(a, b, c, d), max(a, b, c, d)))
return result 示例4: test_sizes
# 需要导入模块: from ctypes import c_bool [as 别名]
# 或者: from ctypes.c_bool import _type_ [as 别名]
def test_sizes(self):
for t in signed_types + unsigned_types + float_types + bool_types:
try:
size = struct.calcsize(t._type_)
except struct.error:
continue
# sizeof of the type...
self.assertEqual(sizeof(t), size)
# and sizeof of an instance
self.assertEqual(sizeof(t()), size) 示例5: test_alignments
# 需要导入模块: from ctypes import c_bool [as 别名]
# 或者: from ctypes.c_bool import _type_ [as 别名]
def test_alignments(self):
for t in signed_types + unsigned_types + float_types:
code = t._type_ # the typecode
align = struct.calcsize("c%c" % code) - struct.calcsize(code)
# alignment of the type...
self.assertEqual((code, alignment(t)),
(code, align))
# and alignment of an instance
self.assertEqual((code, alignment(t())),
(code, align)) 示例6: test_float_from_address
# 需要导入模块: from ctypes import c_bool [as 别名]
# 或者: from ctypes.c_bool import _type_ [as 别名]
def test_float_from_address(self):
from array import array
for t in float_types:
a = array(t._type_, [3.14])
v = t.from_address(a.buffer_info()[0])
self.assertEqual(v.value, a[0])
self.assertIs(type(v), t)
a[0] = 2.3456e17
self.assertEqual(v.value, a[0])
self.assertIs(type(v), t)