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Copy pathcfield.c
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1756 lines (1563 loc) · 47 KB
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/*****************************************************************
This file contains remnant Python 2.3 compatibility code that is no longer
strictly required.
*****************************************************************/
#include "Python.h"
#include <ffi.h>
#ifdef MS_WIN32
#include <windows.h>
#endif
#include "ctypes.h"
#if defined(CTYPES_UNICODE) && !defined(HAVE_USABLE_WCHAR_T)
# define CTYPES_CAPSULE_WCHAR_T "_ctypes/cfield.c wchar_t buffer from unicode"
CTYPES_CAPSULE_INSTANTIATE_DESTRUCTOR(CTYPES_CAPSULE_WCHAR_T)
#endif
/******************************************************************/
/*
PyCField_Type
*/
static PyObject *
PyCField_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
CFieldObject *obj;
obj = (CFieldObject *)type->tp_alloc(type, 0);
return (PyObject *)obj;
}
/*
* Expects the size, index and offset for the current field in *psize and
* *poffset, stores the total size so far in *psize, the offset for the next
* field in *poffset, the alignment requirements for the current field in
* *palign, and returns a field desriptor for this field.
*/
/*
* bitfields extension:
* bitsize != 0: this is a bit field.
* pbitofs points to the current bit offset, this will be updated.
* prev_desc points to the type of the previous bitfield, if any.
*/
PyObject *
PyCField_FromDesc(PyObject *desc, Py_ssize_t index,
Py_ssize_t *pfield_size, int bitsize, int *pbitofs,
Py_ssize_t *psize, Py_ssize_t *poffset, Py_ssize_t *palign,
int pack, int big_endian)
{
CFieldObject *self;
PyObject *proto;
Py_ssize_t size, align;
SETFUNC setfunc = NULL;
GETFUNC getfunc = NULL;
StgDictObject *dict;
int fieldtype;
#define NO_BITFIELD 0
#define NEW_BITFIELD 1
#define CONT_BITFIELD 2
#define EXPAND_BITFIELD 3
self = (CFieldObject *)PyObject_CallObject((PyObject *)&PyCField_Type,
NULL);
if (self == NULL)
return NULL;
dict = PyType_stgdict(desc);
if (!dict) {
PyErr_SetString(PyExc_TypeError,
"has no _stginfo_");
Py_DECREF(self);
return NULL;
}
if (bitsize /* this is a bitfield request */
&& *pfield_size /* we have a bitfield open */
#ifdef MS_WIN32
/* MSVC, GCC with -mms-bitfields */
&& dict->size * 8 == *pfield_size
#else
/* GCC */
&& dict->size * 8 <= *pfield_size
#endif
&& (*pbitofs + bitsize) <= *pfield_size) {
/* continue bit field */
fieldtype = CONT_BITFIELD;
#ifndef MS_WIN32
} else if (bitsize /* this is a bitfield request */
&& *pfield_size /* we have a bitfield open */
&& dict->size * 8 >= *pfield_size
&& (*pbitofs + bitsize) <= dict->size * 8) {
/* expand bit field */
fieldtype = EXPAND_BITFIELD;
#endif
} else if (bitsize) {
/* start new bitfield */
fieldtype = NEW_BITFIELD;
*pbitofs = 0;
*pfield_size = dict->size * 8;
} else {
/* not a bit field */
fieldtype = NO_BITFIELD;
*pbitofs = 0;
*pfield_size = 0;
}
size = dict->size;
proto = desc;
/* Field descriptors for 'c_char * n' are be scpecial cased to
return a Python string instead of an Array object instance...
*/
if (PyCArrayTypeObject_Check(proto)) {
StgDictObject *adict = PyType_stgdict(proto);
StgDictObject *idict;
if (adict && adict->proto) {
idict = PyType_stgdict(adict->proto);
if (!idict) {
PyErr_SetString(PyExc_TypeError,
"has no _stginfo_");
Py_DECREF(self);
return NULL;
}
if (idict->getfunc == _ctypes_get_fielddesc("c")->getfunc) {
struct fielddesc *fd = _ctypes_get_fielddesc("s");
getfunc = fd->getfunc;
setfunc = fd->setfunc;
}
#ifdef CTYPES_UNICODE
if (idict->getfunc == _ctypes_get_fielddesc("u")->getfunc) {
struct fielddesc *fd = _ctypes_get_fielddesc("U");
getfunc = fd->getfunc;
setfunc = fd->setfunc;
}
#endif
}
}
self->setfunc = setfunc;
self->getfunc = getfunc;
self->index = index;
Py_INCREF(proto);
self->proto = proto;
switch (fieldtype) {
case NEW_BITFIELD:
if (big_endian)
self->size = (bitsize << 16) + *pfield_size - *pbitofs - bitsize;
else
self->size = (bitsize << 16) + *pbitofs;
*pbitofs = bitsize;
/* fall through */
case NO_BITFIELD:
if (pack)
align = min(pack, dict->align);
else
align = dict->align;
if (align && *poffset % align) {
Py_ssize_t delta = align - (*poffset % align);
*psize += delta;
*poffset += delta;
}
if (bitsize == 0)
self->size = size;
*psize += size;
self->offset = *poffset;
*poffset += size;
*palign = align;
break;
case EXPAND_BITFIELD:
*poffset += dict->size - *pfield_size/8;
*psize += dict->size - *pfield_size/8;
*pfield_size = dict->size * 8;
if (big_endian)
self->size = (bitsize << 16) + *pfield_size - *pbitofs - bitsize;
else
self->size = (bitsize << 16) + *pbitofs;
self->offset = *poffset - size; /* poffset is already updated for the NEXT field */
*pbitofs += bitsize;
break;
case CONT_BITFIELD:
if (big_endian)
self->size = (bitsize << 16) + *pfield_size - *pbitofs - bitsize;
else
self->size = (bitsize << 16) + *pbitofs;
self->offset = *poffset - size; /* poffset is already updated for the NEXT field */
*pbitofs += bitsize;
break;
}
return (PyObject *)self;
}
static int
PyCField_set(CFieldObject *self, PyObject *inst, PyObject *value)
{
CDataObject *dst;
char *ptr;
if (!CDataObject_Check(inst)) {
PyErr_SetString(PyExc_TypeError,
"not a ctype instance");
return -1;
}
dst = (CDataObject *)inst;
ptr = dst->b_ptr + self->offset;
if (value == NULL) {
PyErr_SetString(PyExc_TypeError,
"can't delete attribute");
return -1;
}
return PyCData_set(inst, self->proto, self->setfunc, value,
self->index, self->size, ptr);
}
static PyObject *
PyCField_get(CFieldObject *self, PyObject *inst, PyTypeObject *type)
{
CDataObject *src;
if (inst == NULL) {
Py_INCREF(self);
return (PyObject *)self;
}
if (!CDataObject_Check(inst)) {
PyErr_SetString(PyExc_TypeError,
"not a ctype instance");
return NULL;
}
src = (CDataObject *)inst;
return PyCData_get(self->proto, self->getfunc, inst,
self->index, self->size, src->b_ptr + self->offset);
}
static PyObject *
PyCField_get_offset(PyObject *self, void *data)
{
return PyInt_FromSsize_t(((CFieldObject *)self)->offset);
}
static PyObject *
PyCField_get_size(PyObject *self, void *data)
{
return PyInt_FromSsize_t(((CFieldObject *)self)->size);
}
static PyGetSetDef PyCField_getset[] = {
{ "offset", PyCField_get_offset, NULL, "offset in bytes of this field" },
{ "size", PyCField_get_size, NULL, "size in bytes of this field" },
{ NULL, NULL, NULL, NULL },
};
static int
PyCField_traverse(CFieldObject *self, visitproc visit, void *arg)
{
Py_VISIT(self->proto);
return 0;
}
static int
PyCField_clear(CFieldObject *self)
{
Py_CLEAR(self->proto);
return 0;
}
static void
PyCField_dealloc(PyObject *self)
{
PyCField_clear((CFieldObject *)self);
self->ob_type->tp_free((PyObject *)self);
}
static PyObject *
PyCField_repr(CFieldObject *self)
{
PyObject *result;
Py_ssize_t bits = self->size >> 16;
Py_ssize_t size = self->size & 0xFFFF;
const char *name;
name = ((PyTypeObject *)self->proto)->tp_name;
if (bits)
result = PyString_FromFormat(
#if (PY_VERSION_HEX < 0x02050000)
"<Field type=%s, ofs=%d:%d, bits=%d>",
#else
"<Field type=%s, ofs=%zd:%zd, bits=%zd>",
#endif
name, self->offset, size, bits);
else
result = PyString_FromFormat(
#if (PY_VERSION_HEX < 0x02050000)
"<Field type=%s, ofs=%d, size=%d>",
#else
"<Field type=%s, ofs=%zd, size=%zd>",
#endif
name, self->offset, size);
return result;
}
PyTypeObject PyCField_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"_ctypes.CField", /* tp_name */
sizeof(CFieldObject), /* tp_basicsize */
0, /* tp_itemsize */
PyCField_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
(reprfunc)PyCField_repr, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
"Structure/Union member", /* tp_doc */
(traverseproc)PyCField_traverse, /* tp_traverse */
(inquiry)PyCField_clear, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
0, /* tp_methods */
0, /* tp_members */
PyCField_getset, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
(descrgetfunc)PyCField_get, /* tp_descr_get */
(descrsetfunc)PyCField_set, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
0, /* tp_alloc */
PyCField_new, /* tp_new */
0, /* tp_free */
};
/******************************************************************/
/*
Accessor functions
*/
/* Derived from Modules/structmodule.c:
Helper routine to get a Python integer and raise the appropriate error
if it isn't one */
static int
get_long(PyObject *v, long *p)
{
long x;
if (PyFloat_Check(v)) {
PyErr_SetString(PyExc_TypeError,
"int expected instead of float");
return -1;
}
x = PyInt_AsUnsignedLongMask(v);
if (x == -1 && PyErr_Occurred())
return -1;
*p = x;
return 0;
}
/* Same, but handling unsigned long */
static int
get_ulong(PyObject *v, unsigned long *p)
{
unsigned long x;
if (PyFloat_Check(v)) {
PyErr_SetString(PyExc_TypeError,
"int expected instead of float");
return -1;
}
x = PyInt_AsUnsignedLongMask(v);
if (x == (unsigned long)-1 && PyErr_Occurred())
return -1;
*p = x;
return 0;
}
#ifdef HAVE_LONG_LONG
/* Same, but handling native long long. */
static int
get_longlong(PyObject *v, PY_LONG_LONG *p)
{
PY_LONG_LONG x;
if (PyFloat_Check(v)) {
PyErr_SetString(PyExc_TypeError,
"int expected instead of float");
return -1;
}
x = PyInt_AsUnsignedLongLongMask(v);
if (x == -1 && PyErr_Occurred())
return -1;
*p = x;
return 0;
}
/* Same, but handling native unsigned long long. */
static int
get_ulonglong(PyObject *v, unsigned PY_LONG_LONG *p)
{
unsigned PY_LONG_LONG x;
if (PyFloat_Check(v)) {
PyErr_SetString(PyExc_TypeError,
"int expected instead of float");
return -1;
}
x = PyInt_AsUnsignedLongLongMask(v);
if (x == (unsigned PY_LONG_LONG)-1 && PyErr_Occurred())
return -1;
*p = x;
return 0;
}
#endif
/*****************************************************************
* Integer fields, with bitfield support
*/
/* how to decode the size field, for integer get/set functions */
#define LOW_BIT(x) ((x) & 0xFFFF)
#define NUM_BITS(x) ((x) >> 16)
/* Doesn't work if NUM_BITS(size) == 0, but it never happens in SET() call. */
#define BIT_MASK(type, size) (((((type)1 << (NUM_BITS(size) - 1)) - 1) << 1) + 1)
/* This macro CHANGES the first parameter IN PLACE. For proper sign handling,
we must first shift left, then right.
*/
#define GET_BITFIELD(v, size) \
if (NUM_BITS(size)) { \
v <<= (sizeof(v)*8 - LOW_BIT(size) - NUM_BITS(size)); \
v >>= (sizeof(v)*8 - NUM_BITS(size)); \
}
/* This macro RETURNS the first parameter with the bit field CHANGED. */
#define SET(type, x, v, size) \
(NUM_BITS(size) ? \
( ( (type)x & ~(BIT_MASK(type, size) << LOW_BIT(size)) ) | ( ((type)v & BIT_MASK(type, size)) << LOW_BIT(size) ) ) \
: (type)v)
/* byte swapping macros */
#define SWAP_2(v) \
( ( (v >> 8) & 0x00FF) | \
( (v << 8) & 0xFF00) )
#define SWAP_4(v) \
( ( (v & 0x000000FF) << 24 ) | \
( (v & 0x0000FF00) << 8 ) | \
( (v & 0x00FF0000) >> 8 ) | \
( ((v >> 24) & 0xFF)) )
#ifdef _MSC_VER
#define SWAP_8(v) \
( ( (v & 0x00000000000000FFL) << 56 ) | \
( (v & 0x000000000000FF00L) << 40 ) | \
( (v & 0x0000000000FF0000L) << 24 ) | \
( (v & 0x00000000FF000000L) << 8 ) | \
( (v & 0x000000FF00000000L) >> 8 ) | \
( (v & 0x0000FF0000000000L) >> 24 ) | \
( (v & 0x00FF000000000000L) >> 40 ) | \
( ((v >> 56) & 0xFF)) )
#else
#define SWAP_8(v) \
( ( (v & 0x00000000000000FFLL) << 56 ) | \
( (v & 0x000000000000FF00LL) << 40 ) | \
( (v & 0x0000000000FF0000LL) << 24 ) | \
( (v & 0x00000000FF000000LL) << 8 ) | \
( (v & 0x000000FF00000000LL) >> 8 ) | \
( (v & 0x0000FF0000000000LL) >> 24 ) | \
( (v & 0x00FF000000000000LL) >> 40 ) | \
( ((v >> 56) & 0xFF)) )
#endif
#define SWAP_INT SWAP_4
#if SIZEOF_LONG == 4
# define SWAP_LONG SWAP_4
#elif SIZEOF_LONG == 8
# define SWAP_LONG SWAP_8
#endif
/*****************************************************************
* The setter methods return an object which must be kept alive, to keep the
* data valid which has been stored in the memory block. The ctypes object
* instance inserts this object into its 'b_objects' list.
*
* For simple Python types like integers or characters, there is nothing that
* has to been kept alive, so Py_None is returned in these cases. But this
* makes inspecting the 'b_objects' list, which is accessible from Python for
* debugging, less useful.
*
* So, defining the _CTYPES_DEBUG_KEEP symbol returns the original value
* instead of Py_None.
*/
#ifdef _CTYPES_DEBUG_KEEP
#define _RET(x) Py_INCREF(x); return x
#else
#define _RET(X) Py_INCREF(Py_None); return Py_None
#endif
/*****************************************************************
* integer accessor methods, supporting bit fields
*/
static PyObject *
b_set(void *ptr, PyObject *value, Py_ssize_t size)
{
long val;
if (get_long(value, &val) < 0)
return NULL;
*(signed char *)ptr = SET(signed char, *(signed char *)ptr, val, size);
_RET(value);
}
static PyObject *
b_get(void *ptr, Py_ssize_t size)
{
signed char val = *(signed char *)ptr;
GET_BITFIELD(val, size);
return PyInt_FromLong(val);
}
static PyObject *
B_set(void *ptr, PyObject *value, Py_ssize_t size)
{
unsigned long val;
if (get_ulong(value, &val) < 0)
return NULL;
*(unsigned char *)ptr = SET(unsigned char, *(unsigned char*)ptr, val, size);
_RET(value);
}
static PyObject *
B_get(void *ptr, Py_ssize_t size)
{
unsigned char val = *(unsigned char *)ptr;
GET_BITFIELD(val, size);
return PyInt_FromLong(val);
}
static PyObject *
h_set(void *ptr, PyObject *value, Py_ssize_t size)
{
long val;
short x;
if (get_long(value, &val) < 0)
return NULL;
memcpy(&x, ptr, sizeof(x));
x = SET(short, x, val, size);
memcpy(ptr, &x, sizeof(x));
_RET(value);
}
static PyObject *
h_set_sw(void *ptr, PyObject *value, Py_ssize_t size)
{
long val;
short field;
if (get_long(value, &val) < 0)
return NULL;
memcpy(&field, ptr, sizeof(field));
field = SWAP_2(field);
field = SET(short, field, val, size);
field = SWAP_2(field);
memcpy(ptr, &field, sizeof(field));
_RET(value);
}
static PyObject *
h_get(void *ptr, Py_ssize_t size)
{
short val;
memcpy(&val, ptr, sizeof(val));
GET_BITFIELD(val, size);
return PyInt_FromLong((long)val);
}
static PyObject *
h_get_sw(void *ptr, Py_ssize_t size)
{
short val;
memcpy(&val, ptr, sizeof(val));
val = SWAP_2(val);
GET_BITFIELD(val, size);
return PyInt_FromLong(val);
}
static PyObject *
H_set(void *ptr, PyObject *value, Py_ssize_t size)
{
unsigned long val;
unsigned short x;
if (get_ulong(value, &val) < 0)
return NULL;
memcpy(&x, ptr, sizeof(x));
x = SET(unsigned short, x, val, size);
memcpy(ptr, &x, sizeof(x));
_RET(value);
}
static PyObject *
H_set_sw(void *ptr, PyObject *value, Py_ssize_t size)
{
unsigned long val;
unsigned short field;
if (get_ulong(value, &val) < 0)
return NULL;
memcpy(&field, ptr, sizeof(field));
field = SWAP_2(field);
field = SET(unsigned short, field, val, size);
field = SWAP_2(field);
memcpy(ptr, &field, sizeof(field));
_RET(value);
}
static PyObject *
H_get(void *ptr, Py_ssize_t size)
{
unsigned short val;
memcpy(&val, ptr, sizeof(val));
GET_BITFIELD(val, size);
return PyInt_FromLong(val);
}
static PyObject *
H_get_sw(void *ptr, Py_ssize_t size)
{
unsigned short val;
memcpy(&val, ptr, sizeof(val));
val = SWAP_2(val);
GET_BITFIELD(val, size);
return PyInt_FromLong(val);
}
static PyObject *
i_set(void *ptr, PyObject *value, Py_ssize_t size)
{
long val;
int x;
if (get_long(value, &val) < 0)
return NULL;
memcpy(&x, ptr, sizeof(x));
x = SET(int, x, val, size);
memcpy(ptr, &x, sizeof(x));
_RET(value);
}
static PyObject *
i_set_sw(void *ptr, PyObject *value, Py_ssize_t size)
{
long val;
int field;
if (get_long(value, &val) < 0)
return NULL;
memcpy(&field, ptr, sizeof(field));
field = SWAP_INT(field);
field = SET(int, field, val, size);
field = SWAP_INT(field);
memcpy(ptr, &field, sizeof(field));
_RET(value);
}
static PyObject *
i_get(void *ptr, Py_ssize_t size)
{
int val;
memcpy(&val, ptr, sizeof(val));
GET_BITFIELD(val, size);
return PyInt_FromLong(val);
}
static PyObject *
i_get_sw(void *ptr, Py_ssize_t size)
{
int val;
memcpy(&val, ptr, sizeof(val));
val = SWAP_INT(val);
GET_BITFIELD(val, size);
return PyInt_FromLong(val);
}
#ifdef MS_WIN32
/* short BOOL - VARIANT_BOOL */
static PyObject *
vBOOL_set(void *ptr, PyObject *value, Py_ssize_t size)
{
switch (PyObject_IsTrue(value)) {
case -1:
return NULL;
case 0:
*(short int *)ptr = VARIANT_FALSE;
_RET(value);
default:
*(short int *)ptr = VARIANT_TRUE;
_RET(value);
}
}
static PyObject *
vBOOL_get(void *ptr, Py_ssize_t size)
{
return PyBool_FromLong((long)*(short int *)ptr);
}
#endif
#ifdef HAVE_C99_BOOL
#define BOOL_TYPE _Bool
#else
#define BOOL_TYPE char
#undef SIZEOF__BOOL
#define SIZEOF__BOOL 1
#endif
static PyObject *
bool_set(void *ptr, PyObject *value, Py_ssize_t size)
{
switch (PyObject_IsTrue(value)) {
case -1:
return NULL;
case 0:
*(BOOL_TYPE *)ptr = 0;
_RET(value);
default:
*(BOOL_TYPE *)ptr = 1;
_RET(value);
}
}
static PyObject *
bool_get(void *ptr, Py_ssize_t size)
{
return PyBool_FromLong((long)*(BOOL_TYPE *)ptr);
}
static PyObject *
I_set(void *ptr, PyObject *value, Py_ssize_t size)
{
unsigned long val;
unsigned int x;
if (get_ulong(value, &val) < 0)
return NULL;
memcpy(&x, ptr, sizeof(x));
x = SET(unsigned int, x, val, size);
memcpy(ptr, &x, sizeof(x));
_RET(value);
}
static PyObject *
I_set_sw(void *ptr, PyObject *value, Py_ssize_t size)
{
unsigned long val;
unsigned int field;
if (get_ulong(value, &val) < 0)
return NULL;
memcpy(&field, ptr, sizeof(field));
field = SWAP_INT(field);
field = SET(unsigned int, field, (unsigned int)val, size);
field = SWAP_INT(field);
memcpy(ptr, &field, sizeof(field));
_RET(value);
}
static PyObject *
I_get(void *ptr, Py_ssize_t size)
{
unsigned int val;
memcpy(&val, ptr, sizeof(val));
GET_BITFIELD(val, size);
return PyLong_FromUnsignedLong(val);
}
static PyObject *
I_get_sw(void *ptr, Py_ssize_t size)
{
unsigned int val;
memcpy(&val, ptr, sizeof(val));
val = SWAP_INT(val);
GET_BITFIELD(val, size);
return PyLong_FromUnsignedLong(val);
}
static PyObject *
l_set(void *ptr, PyObject *value, Py_ssize_t size)
{
long val;
long x;
if (get_long(value, &val) < 0)
return NULL;
memcpy(&x, ptr, sizeof(x));
x = SET(long, x, val, size);
memcpy(ptr, &x, sizeof(x));
_RET(value);
}
static PyObject *
l_set_sw(void *ptr, PyObject *value, Py_ssize_t size)
{
long val;
long field;
if (get_long(value, &val) < 0)
return NULL;
memcpy(&field, ptr, sizeof(field));
field = SWAP_LONG(field);
field = SET(long, field, val, size);
field = SWAP_LONG(field);
memcpy(ptr, &field, sizeof(field));
_RET(value);
}
static PyObject *
l_get(void *ptr, Py_ssize_t size)
{
long val;
memcpy(&val, ptr, sizeof(val));
GET_BITFIELD(val, size);
return PyInt_FromLong(val);
}
static PyObject *
l_get_sw(void *ptr, Py_ssize_t size)
{
long val;
memcpy(&val, ptr, sizeof(val));
val = SWAP_LONG(val);
GET_BITFIELD(val, size);
return PyInt_FromLong(val);
}
static PyObject *
L_set(void *ptr, PyObject *value, Py_ssize_t size)
{
unsigned long val;
unsigned long x;
if (get_ulong(value, &val) < 0)
return NULL;
memcpy(&x, ptr, sizeof(x));
x = SET(unsigned long, x, val, size);
memcpy(ptr, &x, sizeof(x));
_RET(value);
}
static PyObject *
L_set_sw(void *ptr, PyObject *value, Py_ssize_t size)
{
unsigned long val;
unsigned long field;
if (get_ulong(value, &val) < 0)
return NULL;
memcpy(&field, ptr, sizeof(field));
field = SWAP_LONG(field);
field = SET(unsigned long, field, val, size);
field = SWAP_LONG(field);
memcpy(ptr, &field, sizeof(field));
_RET(value);
}
static PyObject *
L_get(void *ptr, Py_ssize_t size)
{
unsigned long val;
memcpy(&val, ptr, sizeof(val));
GET_BITFIELD(val, size);
return PyLong_FromUnsignedLong(val);
}
static PyObject *
L_get_sw(void *ptr, Py_ssize_t size)
{
unsigned long val;
memcpy(&val, ptr, sizeof(val));
val = SWAP_LONG(val);
GET_BITFIELD(val, size);
return PyLong_FromUnsignedLong(val);
}
#ifdef HAVE_LONG_LONG
static PyObject *
q_set(void *ptr, PyObject *value, Py_ssize_t size)
{
PY_LONG_LONG val;
PY_LONG_LONG x;
if (get_longlong(value, &val) < 0)
return NULL;
memcpy(&x, ptr, sizeof(x));
x = SET(PY_LONG_LONG, x, val, size);
memcpy(ptr, &x, sizeof(x));
_RET(value);
}
static PyObject *
q_set_sw(void *ptr, PyObject *value, Py_ssize_t size)
{
PY_LONG_LONG val;
PY_LONG_LONG field;
if (get_longlong(value, &val) < 0)
return NULL;
memcpy(&field, ptr, sizeof(field));
field = SWAP_8(field);
field = SET(PY_LONG_LONG, field, val, size);
field = SWAP_8(field);
memcpy(ptr, &field, sizeof(field));
_RET(value);
}
static PyObject *
q_get(void *ptr, Py_ssize_t size)
{
PY_LONG_LONG val;
memcpy(&val, ptr, sizeof(val));
GET_BITFIELD(val, size);
return PyLong_FromLongLong(val);
}
static PyObject *
q_get_sw(void *ptr, Py_ssize_t size)
{
PY_LONG_LONG val;
memcpy(&val, ptr, sizeof(val));
val = SWAP_8(val);
GET_BITFIELD(val, size);
return PyLong_FromLongLong(val);
}
static PyObject *
Q_set(void *ptr, PyObject *value, Py_ssize_t size)
{
unsigned PY_LONG_LONG val;
unsigned PY_LONG_LONG x;
if (get_ulonglong(value, &val) < 0)
return NULL;
memcpy(&x, ptr, sizeof(x));
x = SET(PY_LONG_LONG, x, val, size);
memcpy(ptr, &x, sizeof(x));
_RET(value);
}
static PyObject *
Q_set_sw(void *ptr, PyObject *value, Py_ssize_t size)
{
unsigned PY_LONG_LONG val;
unsigned PY_LONG_LONG field;
if (get_ulonglong(value, &val) < 0)
return NULL;
memcpy(&field, ptr, sizeof(field));
field = SWAP_8(field);
field = SET(unsigned PY_LONG_LONG, field, val, size);
field = SWAP_8(field);
memcpy(ptr, &field, sizeof(field));
_RET(value);
}
static PyObject *
Q_get(void *ptr, Py_ssize_t size)
{
unsigned PY_LONG_LONG val;
memcpy(&val, ptr, sizeof(val));
GET_BITFIELD(val, size);
return PyLong_FromUnsignedLongLong(val);
}
static PyObject *
Q_get_sw(void *ptr, Py_ssize_t size)
{
unsigned PY_LONG_LONG val;
memcpy(&val, ptr, sizeof(val));
val = SWAP_8(val);
GET_BITFIELD(val, size);
return PyLong_FromUnsignedLongLong(val);
}
#endif