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Issue #28162: Fixes Ctrl+Z handling in console readall()

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This commit is contained in:
Steve Dower 2016-10-08 12:37:57 -07:00
commit 9ffb5d7828
2 changed files with 53 additions and 38 deletions
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42
Lib/test/test_winconsoleio.py
View file

@ -107,16 +107,15 @@ class WindowsConsoleIOTests(unittest.TestCase):
source = 'ϼўТλФЙ\r\n'.encode('utf-16-le')
expected = 'ϼўТλФЙ\r\n'.encode('utf-8')
for read_count in range(1, 16):
stdin = open('CONIN$', 'rb', buffering=0)
write_input(stdin, source)
with open('CONIN$', 'rb', buffering=0) as stdin:
write_input(stdin, source)
actual = b''
while not actual.endswith(b'\n'):
b = stdin.read(read_count)
actual += b
actual = b''
while not actual.endswith(b'\n'):
b = stdin.read(read_count)
actual += b
self.assertEqual(actual, expected, 'stdin.read({})'.format(read_count))
stdin.close()
self.assertEqual(actual, expected, 'stdin.read({})'.format(read_count))
def test_partial_surrogate_reads(self):
# Test that reading less than 1 full character works when stdin
@ -125,17 +124,24 @@ class WindowsConsoleIOTests(unittest.TestCase):
source = '\U00101FFF\U00101001\r\n'.encode('utf-16-le')
expected = '\U00101FFF\U00101001\r\n'.encode('utf-8')
for read_count in range(1, 16):
stdin = open('CONIN$', 'rb', buffering=0)
with open('CONIN$', 'rb', buffering=0) as stdin:
write_input(stdin, source)
actual = b''
while not actual.endswith(b'\n'):
b = stdin.read(read_count)
actual += b
self.assertEqual(actual, expected, 'stdin.read({})'.format(read_count))
def test_ctrl_z(self):
with open('CONIN$', 'rb', buffering=0) as stdin:
source = '\xC4\x1A\r\n'.encode('utf-16-le')
expected = '\xC4'.encode('utf-8')
write_input(stdin, source)
actual = b''
while not actual.endswith(b'\n'):
b = stdin.read(read_count)
actual += b
self.assertEqual(actual, expected, 'stdin.read({})'.format(read_count))
stdin.close()
a, b = stdin.read(1), stdin.readall()
self.assertEqual(expected[0:1], a)
self.assertEqual(expected[1:], b)
if __name__ == "__main__":
unittest.main()

49
Modules/_io/winconsoleio.c
View file

@ -816,44 +816,53 @@ _io__WindowsConsoleIO_readall_impl(winconsoleio *self)
PyMem_Free(subbuf);
/* when the read starts with ^Z or is empty we break */
if (n == 0 || buf[len] == '\x1a')
/* when the read is empty we break */
if (n == 0)
break;
len += n;
}
if (len == 0 || buf[0] == '\x1a' && _buflen(self) == 0) {
if (len == 0 && _buflen(self) == 0) {
/* when the result starts with ^Z we return an empty buffer */
PyMem_Free(buf);
return PyBytes_FromStringAndSize(NULL, 0);
}
Py_BEGIN_ALLOW_THREADS
bytes_size = WideCharToMultiByte(CP_UTF8, 0, buf, len,
NULL, 0, NULL, NULL);
Py_END_ALLOW_THREADS
if (len) {
Py_BEGIN_ALLOW_THREADS
bytes_size = WideCharToMultiByte(CP_UTF8, 0, buf, len,
NULL, 0, NULL, NULL);
Py_END_ALLOW_THREADS
if (!bytes_size) {
DWORD err = GetLastError();
PyMem_Free(buf);
return PyErr_SetFromWindowsErr(err);
if (!bytes_size) {
DWORD err = GetLastError();
PyMem_Free(buf);
return PyErr_SetFromWindowsErr(err);
}
} else {
bytes_size = 0;
}
bytes_size += _buflen(self);
bytes = PyBytes_FromStringAndSize(NULL, bytes_size);
rn = _copyfrombuf(self, PyBytes_AS_STRING(bytes), bytes_size);
Py_BEGIN_ALLOW_THREADS
bytes_size = WideCharToMultiByte(CP_UTF8, 0, buf, len,
&PyBytes_AS_STRING(bytes)[rn], bytes_size - rn, NULL, NULL);
Py_END_ALLOW_THREADS
if (len) {
Py_BEGIN_ALLOW_THREADS
bytes_size = WideCharToMultiByte(CP_UTF8, 0, buf, len,
&PyBytes_AS_STRING(bytes)[rn], bytes_size - rn, NULL, NULL);
Py_END_ALLOW_THREADS
if (!bytes_size) {
DWORD err = GetLastError();
PyMem_Free(buf);
Py_CLEAR(bytes);
return PyErr_SetFromWindowsErr(err);
if (!bytes_size) {
DWORD err = GetLastError();
PyMem_Free(buf);
Py_CLEAR(bytes);
return PyErr_SetFromWindowsErr(err);
}
/* add back the number of preserved bytes */
bytes_size += rn;
}
PyMem_Free(buf);