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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
|
/* Map C struct members to Python object attributes */
#include "Python.h"
#include "structmember.h"
static PyObject *
listmembers(struct memberlist *mlist)
{
int i, n;
PyObject *v;
for (n = 0; mlist[n].name != NULL; n++)
;
v = PyList_New(n);
if (v != NULL) {
for (i = 0; i < n; i++)
PyList_SetItem(v, i,
PyString_FromString(mlist[i].name));
if (PyErr_Occurred()) {
Py_DECREF(v);
v = NULL;
}
else {
PyList_Sort(v);
}
}
return v;
}
PyObject *
PyMember_Get(const char *addr, struct memberlist *mlist, const char *name)
{
struct memberlist *l;
if (strcmp(name, "__members__") == 0)
return listmembers(mlist);
for (l = mlist; l->name != NULL; l++) {
if (strcmp(l->name, name) == 0) {
PyMemberDef copy;
copy.name = l->name;
copy.type = l->type;
copy.offset = l->offset;
copy.flags = l->flags;
copy.doc = NULL;
return PyMember_GetOne(addr, ©);
}
}
PyErr_SetString(PyExc_AttributeError, name);
return NULL;
}
PyObject *
PyMember_GetOne(const char *addr, PyMemberDef *l)
{
PyObject *v;
if ((l->flags & READ_RESTRICTED) &&
PyEval_GetRestricted()) {
PyErr_SetString(PyExc_RuntimeError, "restricted attribute");
return NULL;
}
addr += l->offset;
switch (l->type) {
case T_BYTE:
v = PyInt_FromLong(
(long) (((*(char*)addr & 0xff) ^ 0x80) - 0x80));
break;
case T_UBYTE:
v = PyInt_FromLong((long) *(char*)addr & 0xff);
break;
case T_SHORT:
v = PyInt_FromLong((long) *(short*)addr);
break;
case T_USHORT:
v = PyInt_FromLong((long) *(unsigned short*)addr);
break;
case T_INT:
v = PyInt_FromLong((long) *(int*)addr);
break;
case T_UINT:
v = PyInt_FromLong((long) *(unsigned int*)addr);
break;
case T_LONG:
v = PyInt_FromLong(*(long*)addr);
break;
case T_ULONG:
v = PyLong_FromDouble((double) *(unsigned long*)addr);
break;
case T_FLOAT:
v = PyFloat_FromDouble((double)*(float*)addr);
break;
case T_DOUBLE:
v = PyFloat_FromDouble(*(double*)addr);
break;
case T_STRING:
if (*(char**)addr == NULL) {
Py_INCREF(Py_None);
v = Py_None;
}
else
v = PyString_FromString(*(char**)addr);
break;
case T_STRING_INPLACE:
v = PyString_FromString((char*)addr);
break;
case T_CHAR:
v = PyString_FromStringAndSize((char*)addr, 1);
break;
case T_OBJECT:
v = *(PyObject **)addr;
if (v == NULL)
v = Py_None;
Py_INCREF(v);
break;
case T_OBJECT_EX:
v = *(PyObject **)addr;
if (v == NULL)
PyErr_SetString(PyExc_AttributeError, l->name);
Py_XINCREF(v);
break;
#ifdef HAVE_LONG_LONG
case T_LONGLONG:
v = PyLong_FromLongLong(*(PY_LONG_LONG *)addr);
break;
case T_ULONGLONG:
v = PyLong_FromUnsignedLongLong(*(unsigned PY_LONG_LONG *)addr);
break;
#endif /* HAVE_LONG_LONG */
default:
PyErr_SetString(PyExc_SystemError, "bad memberdescr type");
v = NULL;
}
return v;
}
int
PyMember_Set(char *addr, struct memberlist *mlist, const char *name, PyObject *v)
{
struct memberlist *l;
for (l = mlist; l->name != NULL; l++) {
if (strcmp(l->name, name) == 0) {
PyMemberDef copy;
copy.name = l->name;
copy.type = l->type;
copy.offset = l->offset;
copy.flags = l->flags;
copy.doc = NULL;
return PyMember_SetOne(addr, ©, v);
}
}
PyErr_SetString(PyExc_AttributeError, name);
return -1;
}
int
PyMember_SetOne(char *addr, PyMemberDef *l, PyObject *v)
{
PyObject *oldv;
if ((l->flags & READONLY) || l->type == T_STRING)
{
PyErr_SetString(PyExc_TypeError, "readonly attribute");
return -1;
}
if ((l->flags & WRITE_RESTRICTED) && PyEval_GetRestricted()) {
PyErr_SetString(PyExc_RuntimeError, "restricted attribute");
return -1;
}
if (v == NULL && l->type != T_OBJECT_EX && l->type != T_OBJECT) {
PyErr_SetString(PyExc_TypeError,
"can't delete numeric/char attribute");
return -1;
}
addr += l->offset;
switch (l->type) {
case T_BYTE:
case T_UBYTE:
if (!PyInt_Check(v)) {
PyErr_BadArgument();
return -1;
}
*(char*)addr = (char) PyInt_AsLong(v);
break;
case T_SHORT:
case T_USHORT:
if (!PyInt_Check(v)) {
PyErr_BadArgument();
return -1;
}
*(short*)addr = (short) PyInt_AsLong(v);
break;
case T_UINT:
case T_INT:
if (!PyInt_Check(v)) {
PyErr_BadArgument();
return -1;
}
*(int*)addr = (int) PyInt_AsLong(v);
break;
case T_LONG:
if (!PyInt_Check(v)) {
PyErr_BadArgument();
return -1;
}
*(long*)addr = PyInt_AsLong(v);
break;
case T_ULONG:
if (PyInt_Check(v))
*(long*)addr = PyInt_AsLong(v);
else if (PyLong_Check(v))
*(long*)addr = PyLong_AsLong(v);
else {
PyErr_BadArgument();
return -1;
}
break;
case T_FLOAT:
if (PyInt_Check(v))
*(float*)addr =
(float) PyInt_AsLong(v);
else if (PyFloat_Check(v))
*(float*)addr =
(float) PyFloat_AsDouble(v);
else {
PyErr_BadArgument();
return -1;
}
break;
case T_DOUBLE:
if (PyInt_Check(v))
*(double*)addr = (double) PyInt_AsLong(v);
else if (PyFloat_Check(v))
*(double*)addr = PyFloat_AsDouble(v);
else {
PyErr_BadArgument();
return -1;
}
break;
case T_OBJECT:
case T_OBJECT_EX:
Py_XINCREF(v);
oldv = *(PyObject **)addr;
*(PyObject **)addr = v;
Py_XDECREF(oldv);
break;
case T_CHAR:
if (PyString_Check(v) && PyString_Size(v) == 1) {
*(char*)addr = PyString_AsString(v)[0];
}
else {
PyErr_BadArgument();
return -1;
}
break;
#ifdef HAVE_LONG_LONG
case T_LONGLONG:
if (!PyLong_Check(v)) {
PyErr_BadArgument();
return -1;
} else {
PY_LONG_LONG value;
*(PY_LONG_LONG*)addr = value = PyLong_AsLongLong(v);
if ((value == -1) && PyErr_Occurred()) {
return -1;
}
}
break;
case T_ULONGLONG:
if (!PyLong_Check(v)) {
PyErr_BadArgument();
return -1;
} else {
unsigned PY_LONG_LONG value;
*(unsigned PY_LONG_LONG*)addr = value = PyLong_AsUnsignedLongLong(v);
if ((value == (unsigned PY_LONG_LONG)-1) &&
PyErr_Occurred()) {
return -1;
}
}
break;
#endif /* HAVE_LONG_LONG */
default:
PyErr_Format(PyExc_SystemError,
"bad memberdescr type for %s", l->name);
return -1;
}
return 0;
}
|
