Python源码示例：ctypes.c.from_address()
示例1
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2
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
def test_char_from_address(self):
from ctypes import c_char
from array import array
a = array('c', 'x')
v = c_char.from_address(a.buffer_info()[0])
self.assertEqual(v.value, a[0])
self.assertTrue(type(v) is c_char)
a[0] = '?'
self.assertEqual(v.value, a[0])
# array does not support c_bool / 't'
# def test_bool_from_address(self):
# from ctypes import c_bool
# from array import array
# a = array(c_bool._type_, [True])
# v = t.from_address(a.buffer_info()[0])
# self.assertEqual(v.value, a[0])
# self.assertEqual(type(v) is t)
# a[0] = False
# self.assertEqual(v.value, a[0])
# self.assertEqual(type(v) is t)
示例4
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5
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6
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7
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8
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9
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10
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11
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12
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)
示例13
def test_char_from_address(self):
from ctypes import c_char
from array import array
a = array('c', 'x')
v = c_char.from_address(a.buffer_info()[0])
self.assertEqual(v.value, a[0])
self.assertIs(type(v), c_char)
a[0] = '?'
self.assertEqual(v.value, a[0])
# array does not support c_bool / 't'
示例14
def test_bool_from_address(self):
from ctypes import c_bool
from array import array
a = array(c_bool._type_, [True])
v = t.from_address(a.buffer_info()[0])
self.assertEqual(v.value, a[0])
self.assertEqual(type(v) is t)
a[0] = False
self.assertEqual(v.value, a[0])
self.assertEqual(type(v) is t)
示例15
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.assertTrue(type(v) is t)
a[0] = 2.3456e17
self.assertEqual(v.value, a[0])
self.assertTrue(type(v) is t)
示例16
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)
示例17
def test_char_from_address(self):
from ctypes import c_char
from array import array
a = array('c', 'x')
v = c_char.from_address(a.buffer_info()[0])
self.assertEqual(v.value, a[0])
self.assertIs(type(v), c_char)
a[0] = '?'
self.assertEqual(v.value, a[0])
# array does not support c_bool / 't'
示例18
def test_bool_from_address(self):
from ctypes import c_bool
from array import array
a = array(c_bool._type_, [True])
v = t.from_address(a.buffer_info()[0])
self.assertEqual(v.value, a[0])
self.assertEqual(type(v) is t)
a[0] = False
self.assertEqual(v.value, a[0])
self.assertEqual(type(v) is t)
示例19
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)
示例20
def test_char_from_address(self):
from ctypes import c_char
from array import array
a = array('b', [0])
a[0] = ord('x')
v = c_char.from_address(a.buffer_info()[0])
self.assertEqual(v.value, b'x')
self.assertIs(type(v), c_char)
a[0] = ord('?')
self.assertEqual(v.value, b'?')
# array does not support c_bool / 't'
示例21
def test_bool_from_address(self):
from ctypes import c_bool
from array import array
a = array(c_bool._type_, [True])
v = t.from_address(a.buffer_info()[0])
self.assertEqual(v.value, a[0])
self.assertEqual(type(v) is t)
a[0] = False
self.assertEqual(v.value, a[0])
self.assertEqual(type(v) is t)
示例22
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)
示例23
def test_char_from_address(self):
from ctypes import c_char
from array import array
a = array('b', [0])
a[0] = ord('x')
v = c_char.from_address(a.buffer_info()[0])
self.assertEqual(v.value, b'x')
self.assertIs(type(v), c_char)
a[0] = ord('?')
self.assertEqual(v.value, b'?')
# array does not support c_bool / 't'
示例24
def test_bool_from_address(self):
from ctypes import c_bool
from array import array
a = array(c_bool._type_, [True])
v = t.from_address(a.buffer_info()[0])
self.assertEqual(v.value, a[0])
self.assertEqual(type(v) is t)
a[0] = False
self.assertEqual(v.value, a[0])
self.assertEqual(type(v) is t)
示例25
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)
示例26
def test_char_from_address(self):
from ctypes import c_char
from array import array
a = array('b', [0])
a[0] = ord('x')
v = c_char.from_address(a.buffer_info()[0])
self.assertEqual(v.value, b'x')
self.assertIs(type(v), c_char)
a[0] = ord('?')
self.assertEqual(v.value, b'?')
# array does not support c_bool / 't'
示例27
def test_bool_from_address(self):
from ctypes import c_bool
from array import array
a = array(c_bool._type_, [True])
v = t.from_address(a.buffer_info()[0])
self.assertEqual(v.value, a[0])
self.assertEqual(type(v) is t)
a[0] = False
self.assertEqual(v.value, a[0])
self.assertEqual(type(v) is t)
示例28
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)
示例29
def test_char_from_address(self):
from ctypes import c_char
from array import array
a = array('c', 'x')
v = c_char.from_address(a.buffer_info()[0])
self.assertEqual(v.value, a[0])
self.assertIs(type(v), c_char)
a[0] = '?'
self.assertEqual(v.value, a[0])
# array does not support c_bool / 't'
示例30
def test_bool_from_address(self):
from ctypes import c_bool
from array import array
a = array(c_bool._type_, [True])
v = t.from_address(a.buffer_info()[0])
self.assertEqual(v.value, a[0])
self.assertEqual(type(v) is t)
a[0] = False
self.assertEqual(v.value, a[0])
self.assertEqual(type(v) is t)
