#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, &copy);

}

}

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_BOOL:

v = PyBool_FromLong(*(char*)addr);

break;

case T_BYTE:

v = PyInt_FromLong(*(char*)addr);

break;

case T_UBYTE:

v = PyLong_FromUnsignedLong(*(unsigned char*)addr);

break;

case T_SHORT:

v = PyInt_FromLong(*(short*)addr);

break;

case T_USHORT:

v = PyLong_FromUnsignedLong(*(unsigned short*)addr);

break;

case T_INT:

v = PyInt_FromLong(*(int*)addr);

break;

case T_UINT:

v = PyLong_FromUnsignedLong(*(unsigned int*)addr);

break;

case T_LONG:

v = PyInt_FromLong(*(long*)addr);

break;

case T_ULONG:

v = PyLong_FromUnsignedLong(*(unsigned long*)addr);

break;

case T_PYSSIZET:

v = PyInt_FromSsize_t(*(Py_ssize_t*)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;

}

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, &copy, v);

}

}

PyErr_SetString(PyExc_AttributeError, name);

return -1;

}

#define WARN(msg) \

do { \

if (PyErr_Warn(PyExc_RuntimeWarning, msg) < 0) \

return -1; \

} while (0)

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 & PY_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_BOOL:{

if (!PyBool_Check(v)) {

PyErr_SetString(PyExc_TypeError,

"attribute value type must be bool");

return -1;

}

if (v == Py_True)

*(char*)addr = (char) 1;

else

*(char*)addr = (char) 0;

break;

}

case T_BYTE:{

long long_val = PyInt_AsLong(v);

if ((long_val == -1) && PyErr_Occurred())

return -1;

*(char*)addr = (char)long_val;

/* XXX: For compatibility, only warn about truncations

if ((long_val > CHAR_MAX) || (long_val < CHAR_MIN))

WARN("Truncation of value to char");

break;

}

case T_UBYTE:{

long long_val = PyInt_AsLong(v);

if ((long_val == -1) && PyErr_Occurred())

return -1;

*(unsigned char*)addr = (unsigned char)long_val;

if ((long_val > UCHAR_MAX) || (long_val < 0))

WARN("Truncation of value to unsigned char");

break;

}

case T_SHORT:{

long long_val = PyInt_AsLong(v);

if ((long_val == -1) && PyErr_Occurred())

return -1;

*(short*)addr = (short)long_val;

if ((long_val > SHRT_MAX) || (long_val < SHRT_MIN))

WARN("Truncation of value to short");

break;

}

case T_USHORT:{

long long_val = PyInt_AsLong(v);

if ((long_val == -1) && PyErr_Occurred())

return -1;

*(unsigned short*)addr = (unsigned short)long_val;

if ((long_val > USHRT_MAX) || (long_val < 0))

WARN("Truncation of value to unsigned short");

break;

}

case T_INT:{

long long_val = PyInt_AsLong(v);

if ((long_val == -1) && PyErr_Occurred())

return -1;

*(int *)addr = (int)long_val;

if ((long_val > INT_MAX) || (long_val < INT_MIN))

WARN("Truncation of value to int");

break;

}

case T_UINT:{

unsigned long ulong_val = PyLong_AsUnsignedLong(v);

if ((ulong_val == (unsigned int)-1) && PyErr_Occurred()) {

/* XXX: For compatibility, accept negative int values

PyErr_Clear();

ulong_val = PyLong_AsLong(v);

if ((ulong_val == (unsigned int)-1) && PyErr_Occurred())

return -1;

*(unsigned int *)addr = (unsigned int)ulong_val;

WARN("Writing negative value into unsigned field");

} else

*(unsigned int *)addr = (unsigned int)ulong_val;

if (ulong_val > UINT_MAX)

WARN("Truncation of value to unsigned int");

break;

}

case T_LONG:{

*(long*)addr = PyLong_AsLong(v);

if ((*(long*)addr == -1) && PyErr_Occurred())

return -1;

break;

}

case T_ULONG:{

*(unsigned long*)addr = PyLong_AsUnsignedLong(v);

if ((*(unsigned long*)addr == (unsigned long)-1)

&& PyErr_Occurred()) {

/* XXX: For compatibility, accept negative int values

PyErr_Clear();

*(unsigned long*)addr = PyLong_AsLong(v);

if ((*(unsigned long*)addr == (unsigned int)-1)

&& PyErr_Occurred())

return -1;

WARN("Writing negative value into unsigned field");

}

break;

}

case T_PYSSIZET:{

*(Py_ssize_t*)addr = PyInt_AsSsize_t(v);

if ((*(Py_ssize_t*)addr == (Py_ssize_t)-1)

&& PyErr_Occurred())

return -1;

break;

}

case T_FLOAT:{

double double_val = PyFloat_AsDouble(v);

if ((double_val == -1) && PyErr_Occurred())

return -1;

*(float*)addr = (float)double_val;

break;

}

case T_DOUBLE:

*(double*)addr = PyFloat_AsDouble(v);

if ((*(double*)addr == -1) && PyErr_Occurred())

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:{

PY_LONG_LONG value;

*(PY_LONG_LONG*)addr = value = PyLong_AsLongLong(v);

if ((value == -1) && PyErr_Occurred())

return -1;

break;

}

case T_ULONGLONG:{

unsigned PY_LONG_LONG value;

/* ??? PyLong_AsLongLong accepts an int, but PyLong_AsUnsignedLongLong

if (PyLong_Check(v))

*(unsigned PY_LONG_LONG*)addr = value = PyLong_AsUnsignedLongLong(v);

else

*(unsigned PY_LONG_LONG*)addr = value = PyInt_AsLong(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;

}