mirror of
https://github.com/python/cpython.git
synced 2024-11-30 10:41:14 +01:00
adf0e437cb
old value in a temporary and XDECREF it only after then new value has been set. This prevents the (unlikely) case where the destructor of the member uses the containing object -- it would find it in an undefined state.
284 lines
6.5 KiB
C
284 lines
6.5 KiB
C
/***********************************************************
|
|
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
|
|
The Netherlands.
|
|
|
|
All Rights Reserved
|
|
|
|
Permission to use, copy, modify, and distribute this software and its
|
|
documentation for any purpose and without fee is hereby granted,
|
|
provided that the above copyright notice appear in all copies and that
|
|
both that copyright notice and this permission notice appear in
|
|
supporting documentation, and that the names of Stichting Mathematisch
|
|
Centrum or CWI or Corporation for National Research Initiatives or
|
|
CNRI not be used in advertising or publicity pertaining to
|
|
distribution of the software without specific, written prior
|
|
permission.
|
|
|
|
While CWI is the initial source for this software, a modified version
|
|
is made available by the Corporation for National Research Initiatives
|
|
(CNRI) at the Internet address ftp://ftp.python.org.
|
|
|
|
STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
|
|
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
|
|
CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
|
|
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
|
|
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
|
PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
******************************************************************/
|
|
|
|
/* Map C struct members to Python object attributes */
|
|
|
|
#include "Python.h"
|
|
|
|
#include "structmember.h"
|
|
|
|
static PyObject *
|
|
listmembers(mlist)
|
|
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(addr, mlist, name)
|
|
char *addr;
|
|
struct memberlist *mlist;
|
|
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) {
|
|
PyObject *v;
|
|
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;
|
|
#ifdef macintosh
|
|
case T_PSTRING:
|
|
if (*(char**)addr == NULL) {
|
|
Py_INCREF(Py_None);
|
|
v = Py_None;
|
|
}
|
|
else
|
|
v = PyString_FromStringAndSize(
|
|
(*(char**)addr)+1,
|
|
**(unsigned char**)addr);
|
|
break;
|
|
case T_PSTRING_INPLACE:
|
|
v = PyString_FromStringAndSize(
|
|
((char*)addr)+1,
|
|
*(unsigned char*)addr);
|
|
break;
|
|
#endif /* macintosh */
|
|
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;
|
|
default:
|
|
PyErr_SetString(PyExc_SystemError,
|
|
"bad memberlist type");
|
|
v = NULL;
|
|
}
|
|
return v;
|
|
}
|
|
}
|
|
|
|
PyErr_SetString(PyExc_AttributeError, name);
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
PyMember_Set(addr, mlist, name, v)
|
|
char *addr;
|
|
struct memberlist *mlist;
|
|
char *name;
|
|
PyObject *v;
|
|
{
|
|
struct memberlist *l;
|
|
PyObject *oldv;
|
|
|
|
for (l = mlist; l->name != NULL; l++) {
|
|
if (strcmp(l->name, name) == 0) {
|
|
#ifdef macintosh
|
|
if (l->readonly || l->type == T_STRING ||
|
|
l->type == T_PSTRING)
|
|
{
|
|
#else
|
|
if (l->readonly || l->type == T_STRING ) {
|
|
#endif /* macintosh */
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"readonly attribute");
|
|
return -1;
|
|
}
|
|
if (v == NULL && 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:
|
|
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;
|
|
}
|
|
default:
|
|
PyErr_SetString(PyExc_SystemError,
|
|
"bad memberlist type");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
PyErr_SetString(PyExc_AttributeError, name);
|
|
return -1;
|
|
}
|