interoptopus_backend_cpython 0.14.25

Generates CPython bindings.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180

import ctypes
import reference_project as r
import unittest
import sys

r.init_lib("../../../../target/debug/interoptopus_reference_project.dll")


# https://stackoverflow.com/questions/52475749/maximum-and-minimum-value-of-c-types-integers-from-python
def limits(c_int_type):
    signed = c_int_type(-1).value < c_int_type(0).value
    bit_size = ctypes.sizeof(c_int_type) * 8
    signed_limit = 2 ** (bit_size - 1)
    return (-signed_limit, signed_limit - 1) if signed else (0, 2 * signed_limit - 1)


i8_min = limits(ctypes.c_int8)[0]
i16_min = limits(ctypes.c_int16)[0]
i32_min = limits(ctypes.c_int32)[0]
i64_min = limits(ctypes.c_int64)[0]

i8_max = limits(ctypes.c_int8)[1]
i16_max = limits(ctypes.c_int16)[1]
i32_max = limits(ctypes.c_int32)[1]
i64_max = limits(ctypes.c_int64)[1]

u8_max = limits(ctypes.c_uint8)[1]
u16_max = limits(ctypes.c_uint16)[1]
u32_max = limits(ctypes.c_uint32)[1]
u64_max = limits(ctypes.c_uint64)[1]


class TestFunctions(unittest.TestCase):

    def test_primitives(self):
        r.primitive_void()
        r.primitive_void2()

        self.assertEqual(True, r.primitive_bool(False))

        self.assertEqual(0, r.primitive_u8(u8_max))
        self.assertEqual(0, r.primitive_u16(u16_max))
        self.assertEqual(0, r.primitive_u32(u32_max))
        self.assertEqual(0, r.primitive_u64(u64_max))

        self.assertEqual(-i8_max, r.primitive_i8(i8_max))
        self.assertEqual(-i16_max, r.primitive_i16(i16_max))
        self.assertEqual(-i32_max, r.primitive_i32(i32_max))
        self.assertEqual(-i64_max, r.primitive_i64(i64_max))

    def test_ptr(self):
        ptr = (ctypes.c_int64 * 100)(100, 2, 3)
        ptr_ptr = ctypes.POINTER(ctypes.POINTER(ctypes.c_int64))()

        r.ptr_ptr(ptr_ptr)

        # This is unfortunately a bit ugly in ctypes. To compare pointers for equality you must
        # cast them to `c_void_p` AND compare `.value`.
        self.assertEqual(ctypes.cast(ptr, ctypes.c_void_p).value, ctypes.cast(r.ptr(ptr), ctypes.c_void_p).value)
        self.assertEqual(ctypes.cast(ptr_ptr, ctypes.c_void_p).value,
                         ctypes.cast(r.ptr_ptr(ptr_ptr), ctypes.c_void_p).value)

        self.assertEqual(True, r.ref_option(ptr))
        self.assertEqual(True, r.ref_mut_option(ptr))

        self.assertEqual(ctypes.cast(ptr, ctypes.c_void_p).value, ctypes.cast(r.ptr_mut(ptr), ctypes.c_void_p).value)
        self.assertEqual(-100, ptr[0])

    def test_tuple(self):
        tupled = r.Tupled(x0=100)
        self.assertEqual(200, r.tupled(tupled).x0)

    def test_complex(self):
        vec = r.Vec3f32()
        foreign = r.SomeForeignType()

        r.complex_args_1(vec, None)
        self.assertEqual(None, r.complex_args_2(foreign))

    def test_callback(self):

        def my_callback(param):
            return param * 3

        self.assertEqual(9, r.callback(my_callback, 3))

    def test_generic(self):
        uint32 = (ctypes.c_uint32 * 10)(123)

        genericu32 = r.Genericu32(uint32)
        phantom = r.Phantomu8()

        self.assertEqual(123, r.generic_1a(genericu32, phantom))

    def test_documented(self):
        documented = r.StructDocumented()

        self.assertEqual(r.EnumDocumented.A, r.documented(documented))

    def test_ambiguous(self):
        vec1 = r.Vec1(x=10.0)
        vec2 = r.Vec2(x=10.0, z=11.0)

        for i in range(1000):
            self.assertEqual(10.0, r.ambiguous_1(vec1).x)
            self.assertEqual(11.0, r.ambiguous_2(vec2).z)
            self.assertEqual(True, r.ambiguous_3(vec1, vec2))

    def test_namespaces(self):
        vec = r.Vec(x=10)

        self.assertEqual(10.0, r.namespaced_type(vec).x)

    def test_panics(self):
        worked = False
        try:
            r.panics()
            worked = True
        except:
            pass

        self.assertFalse(worked)

    def test_slice_from_ctypes_array(self):
        array = (ctypes.c_uint32 * 10)()
        returned_length = r.pattern_ffi_slice_1(array)
        self.assertEqual(len(array), returned_length)

        slice = r.Sliceu32(data=ctypes.cast(array, ctypes.POINTER(ctypes.c_uint32)), len=len(array))
        returned_length = r.pattern_ffi_slice_1(slice)
        self.assertEqual(len(slice), returned_length)

    def test_slice_from_ctypes_array_callback(self):
        array = (ctypes.c_uint8 * 10)()

        def callback(x):
            self.assertEqual(1, x[0])
            self.assertEqual(0, x[1])

        r.pattern_ffi_slice_3(array, callback)


class TestPatterns(unittest.TestCase):

    def test_services(self):
        service = r.SimpleService.new_with(123)
        slice = service.return_slice_mut()

        self.assertEqual(10, service.method_value(10))
        self.assertEqual(123, slice[0])

    def test_service_new_string(self):
        service = r.SimpleService.new_with_string(b"abc")

    def test_ascii_pointer(self):
        self.assertEqual(3, r.pattern_ascii_pointer_1(b"111"))
        self.assertEqual(b'', r.pattern_ascii_pointer_2())

    def test_c_char(self):
        self.assertEqual(b'X', r.pattern_ffi_cchar(b'X'))

    def test_slice_callback(self):
        def callback(x):
            self.assertEqual(9, x[-1])
            self.assertEqual(9, x.last())
            self.assertEqual(9, x.bytearray()[-1])
            try:
                i = x[10]
                self.assertFalse(True, "Index out of error should throw exception")
            except IndexError:
                pass

            return 0

        r.pattern_ffi_slice_delegate(callback)


if __name__ == '__main__':
    unittest.main()
    sys.exit(0)