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from pypy.module.cpyext.test.test_api import BaseApiTest
from pypy.module.cpyext.test.test_cpyext import AppTestCpythonExtensionBase
class AppTestGetargs(AppTestCpythonExtensionBase):
def w_import_parser(self, implementation, argstyle='METH_VARARGS',
PY_SSIZE_T_CLEAN=False):
mod = self.import_extension(
'modname', [('funcname', argstyle, implementation)],
PY_SSIZE_T_CLEAN=PY_SSIZE_T_CLEAN)
return mod.funcname
def test_pyarg_parse_int(self):
"""
The `i` format specifier can be used to parse an integer.
"""
oneargint = self.import_parser(
'''
int l;
if (!PyArg_ParseTuple(args, "i", &l)) {
return NULL;
}
return PyLong_FromLong(l);
''')
assert oneargint(1) == 1
raises(TypeError, oneargint, None)
raises(TypeError, oneargint)
def test_pyarg_parse_fromname(self):
"""
The name of the function parsing the arguments can be given after a `:`
in the argument format string.
"""
oneargandform = self.import_parser(
'''
int l;
if (!PyArg_ParseTuple(args, "i:oneargandstuff", &l)) {
return NULL;
}
return PyLong_FromLong(l);
''')
assert oneargandform(1) == 1
def test_pyarg_parse_object(self):
"""
The `O` format specifier can be used to parse an arbitrary object.
"""
oneargobject = self.import_parser(
'''
PyObject *obj;
if (!PyArg_ParseTuple(args, "O", &obj)) {
return NULL;
}
Py_INCREF(obj);
return obj;
''')
sentinel = object()
res = oneargobject(sentinel)
assert res is sentinel
def test_pyarg_parse_restricted_object_type(self):
"""
The `O!` format specifier can be used to parse an object of a particular
type.
"""
oneargobjectandlisttype = self.import_parser(
'''
PyObject *obj;
if (!PyArg_ParseTuple(args, "O!", &PyList_Type, &obj)) {
return NULL;
}
Py_INCREF(obj);
return obj;
''')
sentinel = object()
raises(TypeError, "oneargobjectandlisttype(sentinel)")
sentinel = []
res = oneargobjectandlisttype(sentinel)
assert res is sentinel
def test_pyarg_parse_one_optional(self):
"""
An object corresponding to a format specifier after a `|` in the
argument format string is optional and may be passed or not.
"""
twoopt = self.import_parser(
'''
PyObject *a;
PyObject *b = NULL;
if (!PyArg_ParseTuple(args, "O|O", &a, &b)) {
return NULL;
}
if (b)
Py_INCREF(b);
else
b = PyLong_FromLong(42);
/* return an owned reference */
return b;
''')
assert twoopt(1) == 42
assert twoopt(1, 2) == 2
raises(TypeError, twoopt, 1, 2, 3)
def test_pyarg_parse_string_py_buffer(self):
"""
The `s*` format specifier can be used to parse a str into a Py_buffer
structure containing a pointer to the string data and the length of the
string data.
"""
pybuffer = self.import_parser(
'''
Py_buffer buf;
PyObject *result;
if (!PyArg_ParseTuple(args, "s*", &buf)) {
return NULL;
}
result = PyBytes_FromStringAndSize(buf.buf, buf.len);
PyBuffer_Release(&buf);
return result;
''')
assert b'foo\0bar\0baz' == pybuffer(b'foo\0bar\0baz')
#return # XXX?
assert b'foo\0bar\0baz' == pybuffer(bytearray(b'foo\0bar\0baz'))
def test_pyarg_parse_string_fails(self):
"""
Test the failing case of PyArg_ParseTuple(): it must not keep
a reference on the PyObject passed in.
"""
pybuffer = self.import_parser(
'''
Py_buffer buf1, buf2, buf3;
if (!PyArg_ParseTuple(args, "s*s*s*", &buf1, &buf2, &buf3)) {
return NULL;
}
Py_FatalError("should not get there");
return NULL;
''')
freed = []
class freestring(bytes):
def __del__(self):
freed.append('x')
raises(TypeError, pybuffer,
freestring(b"string"), freestring(b"other string"), 42)
self.debug_collect() # gc.collect() is not enough in this test:
# we need to check and free the PyObject
# linked to the freestring object as well
assert freed == ['x', 'x']
def test_pyarg_parse_charbuf_and_length(self):
"""
The `s#` format specifier can be used to parse a read-only 8-bit
character buffer into a char* and int giving its length in bytes.
"""
charbuf = self.import_parser(
'''
char *buf;
int len;
if (!PyArg_ParseTuple(args, "s#", &buf, &len)) {
return NULL;
}
return PyBytes_FromStringAndSize(buf, len);
''')
raises(TypeError, "charbuf(10)")
assert b'foo\0bar\0baz' == charbuf(b'foo\0bar\0baz')
def test_pyarg_parse_without_py_ssize_t(self):
import sys
charbuf = self.import_parser(
'''
char *buf;
Py_ssize_t y = -1;
if (!PyArg_ParseTuple(args, "s#", &buf, &y)) {
return NULL;
}
return PyLong_FromSsize_t(y);
''')
if sys.maxsize < 2**32:
expected = 5
elif sys.byteorder == 'little':
expected = -0xfffffffb
else:
expected = 0x5ffffffff
assert charbuf(b'12345') == expected
def test_pyarg_parse_with_py_ssize_t(self):
charbuf = self.import_parser(
'''
char *buf;
Py_ssize_t y = -1;
if (!PyArg_ParseTuple(args, "s#", &buf, &y)) {
return NULL;
}
return PyLong_FromSsize_t(y);
''', PY_SSIZE_T_CLEAN=True)
assert charbuf(b'12345') == 5
def test_pyarg_parse_with_py_ssize_t_bytes(self):
charbuf = self.import_parser(
'''
char *buf;
Py_ssize_t len = -1;
if (!PyArg_ParseTuple(args, "y#", &buf, &len)) {
return NULL;
}
return PyBytes_FromStringAndSize(buf, len);
''', PY_SSIZE_T_CLEAN=True)
assert type(charbuf(b'12345')) is bytes
assert charbuf(b'12345') == b'12345'
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