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import py, sys, struct
from ctypes_configure import configure
from ctypes_configure.cbuild import ExternalCompilationInfo
import ctypes
def test_dirent():
dirent = configure.getstruct("struct dirent",
"""
struct dirent /* for this example only, not the exact dirent */
{
long d_ino;
int d_off;
unsigned short d_reclen;
char d_name[32];
};
""",
[("d_reclen", ctypes.c_ushort)])
assert issubclass(dirent, ctypes.Structure)
ssize = (ctypes.sizeof(ctypes.c_long) +
ctypes.sizeof(ctypes.c_int) +
ctypes.sizeof(ctypes.c_ushort) +
32)
extra_padding = (-ssize) % ctypes.alignment(ctypes.c_long)
assert dirent._fields_ == [('_alignment', ctypes.c_long),
('_pad0', ctypes.c_char),
('_pad1', ctypes.c_char),
('_pad2', ctypes.c_char),
('_pad3', ctypes.c_char),
('d_reclen', ctypes.c_ushort),
] + [
('_pad%d' % n, ctypes.c_char)
for n in range(4, 4+32+extra_padding)]
assert ctypes.sizeof(dirent) == ssize + extra_padding
assert ctypes.alignment(dirent) == ctypes.alignment(ctypes.c_long)
def test_fit_type():
S = configure.getstruct("struct S",
"""
struct S {
signed char c;
unsigned char uc;
short s;
unsigned short us;
int i;
unsigned int ui;
long l;
unsigned long ul;
long long ll;
unsigned long long ull;
float f;
double d;
};
""",
[("c", ctypes.c_int),
("uc", ctypes.c_int),
("s", ctypes.c_uint),
("us", ctypes.c_int),
("i", ctypes.c_int),
("ui", ctypes.c_int),
("l", ctypes.c_int),
("ul", ctypes.c_int),
("ll", ctypes.c_int),
("ull", ctypes.c_int),
("f", ctypes.c_double),
("d", ctypes.c_float)])
assert issubclass(S, ctypes.Structure)
fields = dict(S._fields_)
assert fields["c"] == ctypes.c_byte
assert fields["uc"] == ctypes.c_ubyte
assert fields["s"] == ctypes.c_short
assert fields["us"] == ctypes.c_ushort
assert fields["i"] == ctypes.c_int
assert fields["ui"] == ctypes.c_uint
assert fields["l"] == ctypes.c_long
assert fields["ul"] == ctypes.c_ulong
assert fields["ll"] == ctypes.c_longlong
assert fields["ull"] == ctypes.c_ulonglong
assert fields["f"] == ctypes.c_float
assert fields["d"] == ctypes.c_double
def test_simple_type():
ctype = configure.getsimpletype('test_t',
'typedef unsigned short test_t;',
ctypes.c_int)
assert ctype == ctypes.c_ushort
def test_constant_integer():
value = configure.getconstantinteger('BLAH',
'#define BLAH (6*7)')
assert value == 42
value = configure.getconstantinteger('BLAH',
'#define BLAH (-2147483648LL)')
assert value == -2147483648
value = configure.getconstantinteger('BLAH',
'#define BLAH (3333333333ULL)')
assert value == 3333333333
def test_defined():
res = configure.getdefined('ALFKJLKJFLKJFKLEJDLKEWMECEE', '')
assert not res
res = configure.getdefined('ALFKJLKJFLKJFKLEJDLKEWMECEE',
'#define ALFKJLKJFLKJFKLEJDLKEWMECEE')
assert res
def test_configure():
configdir = configure.configdir
test_h = configdir.join('test_ctypes_platform.h')
test_h.write('#define XYZZY 42\n')
class CConfig:
_compilation_info_ = ExternalCompilationInfo(
pre_include_lines = ["/* a C comment */",
"#include <stdio.h>",
"#include <test_ctypes_platform.h>"],
include_dirs = [str(configdir)]
)
FILE = configure.Struct('FILE', [])
ushort = configure.SimpleType('unsigned short')
XYZZY = configure.ConstantInteger('XYZZY')
res = configure.configure(CConfig)
assert issubclass(res['FILE'], ctypes.Structure)
assert res == {'FILE': res['FILE'],
'ushort': ctypes.c_ushort,
'XYZZY': 42}
def test_ifdef():
class CConfig:
_compilation_info_ = ExternalCompilationInfo(
post_include_lines = ['/* a C comment */',
'#define XYZZY 42',
'typedef int foo;',
'struct s {',
'int i;',
'double f;'
'};'])
s = configure.Struct('struct s', [('i', ctypes.c_int)],
ifdef='XYZZY')
z = configure.Struct('struct z', [('i', ctypes.c_int)],
ifdef='FOOBAR')
foo = configure.SimpleType('foo', ifdef='XYZZY')
bar = configure.SimpleType('bar', ifdef='FOOBAR')
res = configure.configure(CConfig)
assert res['s'] is not None
assert res['z'] is None
assert res['foo'] is not None
assert res['bar'] is None
def test_nested_structs():
class CConfig:
_compilation_info_ = ExternalCompilationInfo(
post_include_lines="""
struct x {
int foo;
unsigned long bar;
};
struct y {
char c;
struct x x;
};
""".split("\n"))
x = configure.Struct("struct x", [("bar", ctypes.c_short)])
y = configure.Struct("struct y", [("x", x)])
res = configure.configure(CConfig)
c_x = res["x"]
c_y = res["y"]
c_y_fields = dict(c_y._fields_)
assert issubclass(c_x , ctypes.Structure)
assert issubclass(c_y, ctypes.Structure)
assert c_y_fields["x"] is c_x
def test_array():
dirent = configure.getstruct("struct dirent",
"""
struct dirent /* for this example only, not the exact dirent */
{
long d_ino;
int d_off;
unsigned short d_reclen;
char d_name[32];
};
""",
[("d_name", ctypes.c_char * 0)])
assert dirent.d_name.size == 32
def test_has():
assert configure.has("x", "int x = 3;")
assert not configure.has("x", "")
# has() should also not crash if it is given an invalid #include
assert not configure.has("x", "#include <some/path/which/cannot/exist>")
def test_check_eci():
eci = ExternalCompilationInfo()
assert configure.check_eci(eci)
eci = ExternalCompilationInfo(libraries=['some_name_that_doesnt_exist_'])
assert not configure.check_eci(eci)
def test_sizeof():
assert configure.sizeof("char", ExternalCompilationInfo()) == 1
def test_memory_alignment():
a = configure.memory_alignment()
print a
assert a % struct.calcsize("P") == 0
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