| #include "Python.h" |
| |
| #include <ffi.h> |
| #ifdef MS_WIN32 |
| #include <windows.h> |
| #endif |
| #include "ctypes.h" |
| |
| |
| #define CTYPES_CFIELD_CAPSULE_NAME_PYMEM "_ctypes/cfield.c pymem" |
| |
| static void pymem_destructor(PyObject *ptr) |
| { |
| void *p = PyCapsule_GetPointer(ptr, CTYPES_CFIELD_CAPSULE_NAME_PYMEM); |
| if (p) { |
| PyMem_Free(p); |
| } |
| } |
| |
| |
| /******************************************************************/ |
| /* |
| 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 PyLong_FromSsize_t(((CFieldObject *)self)->offset); |
| } |
| |
| static PyObject * |
| PyCField_get_size(PyObject *self, void *data) |
| { |
| return PyLong_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 = PyUnicode_FromFormat( |
| "<Field type=%s, ofs=%zd:%zd, bits=%zd>", |
| name, self->offset, size, bits); |
| else |
| result = PyUnicode_FromFormat( |
| "<Field type=%s, ofs=%zd, size=%zd>", |
| 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_reserved */ |
| (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 = PyLong_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 = PyLong_AsUnsignedLongMask(v); |
| if (x == (unsigned long)-1 && PyErr_Occurred()) |
| return -1; |
| *p = x; |
| return 0; |
| } |
| |
| /* Same, but handling native long long. */ |
| |
| static int |
| get_longlong(PyObject *v, long long *p) |
| { |
| long long x; |
| if (PyFloat_Check(v)) { |
| PyErr_SetString(PyExc_TypeError, |
| "int expected instead of float"); |
| return -1; |
| } |
| x = PyLong_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 long long *p) |
| { |
| unsigned long long x; |
| if (PyFloat_Check(v)) { |
| PyErr_SetString(PyExc_TypeError, |
| "int expected instead of float"); |
| return -1; |
| } |
| x = PyLong_AsUnsignedLongLongMask(v); |
| if (x == (unsigned long long)-1 && PyErr_Occurred()) |
| return -1; |
| *p = x; |
| return 0; |
| } |
| |
| /***************************************************************** |
| * 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_RETURN_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 PyLong_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 PyLong_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 PyLong_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 PyLong_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 PyLong_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 PyLong_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 PyLong_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 PyLong_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 |
| |
| static PyObject * |
| bool_set(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| switch (PyObject_IsTrue(value)) { |
| case -1: |
| return NULL; |
| case 0: |
| *(_Bool *)ptr = 0; |
| _RET(value); |
| default: |
| *(_Bool *)ptr = 1; |
| _RET(value); |
| } |
| } |
| |
| static PyObject * |
| bool_get(void *ptr, Py_ssize_t size) |
| { |
| return PyBool_FromLong((long)*(_Bool *)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 PyLong_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 PyLong_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); |
| } |
| |
| static PyObject * |
| q_set(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| long long val; |
| long long x; |
| if (get_longlong(value, &val) < 0) |
| return NULL; |
| memcpy(&x, ptr, sizeof(x)); |
| x = SET(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) |
| { |
| long long val; |
| long long field; |
| if (get_longlong(value, &val) < 0) |
| return NULL; |
| memcpy(&field, ptr, sizeof(field)); |
| field = SWAP_8(field); |
| field = SET(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) |
| { |
| 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) |
| { |
| 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 long long val; |
| unsigned long long x; |
| if (get_ulonglong(value, &val) < 0) |
| return NULL; |
| memcpy(&x, ptr, sizeof(x)); |
| x = SET(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 long long val; |
| unsigned long long field; |
| if (get_ulonglong(value, &val) < 0) |
| return NULL; |
| memcpy(&field, ptr, sizeof(field)); |
| field = SWAP_8(field); |
| field = SET(unsigned 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 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 long long val; |
| memcpy(&val, ptr, sizeof(val)); |
| val = SWAP_8(val); |
| GET_BITFIELD(val, size); |
| return PyLong_FromUnsignedLongLong(val); |
| } |
| |
| /***************************************************************** |
| * non-integer accessor methods, not supporting bit fields |
| */ |
| |
| |
| static PyObject * |
| g_set(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| long double x; |
| |
| x = PyFloat_AsDouble(value); |
| if (x == -1 && PyErr_Occurred()) |
| return NULL; |
| memcpy(ptr, &x, sizeof(long double)); |
| _RET(value); |
| } |
| |
| static PyObject * |
| g_get(void *ptr, Py_ssize_t size) |
| { |
| long double val; |
| memcpy(&val, ptr, sizeof(long double)); |
| return PyFloat_FromDouble(val); |
| } |
| |
| static PyObject * |
| d_set(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| double x; |
| |
| x = PyFloat_AsDouble(value); |
| if (x == -1 && PyErr_Occurred()) |
| return NULL; |
| memcpy(ptr, &x, sizeof(double)); |
| _RET(value); |
| } |
| |
| static PyObject * |
| d_get(void *ptr, Py_ssize_t size) |
| { |
| double val; |
| memcpy(&val, ptr, sizeof(val)); |
| return PyFloat_FromDouble(val); |
| } |
| |
| static PyObject * |
| d_set_sw(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| double x; |
| |
| x = PyFloat_AsDouble(value); |
| if (x == -1 && PyErr_Occurred()) |
| return NULL; |
| #ifdef WORDS_BIGENDIAN |
| if (_PyFloat_Pack8(x, (unsigned char *)ptr, 1)) |
| return NULL; |
| #else |
| if (_PyFloat_Pack8(x, (unsigned char *)ptr, 0)) |
| return NULL; |
| #endif |
| _RET(value); |
| } |
| |
| static PyObject * |
| d_get_sw(void *ptr, Py_ssize_t size) |
| { |
| #ifdef WORDS_BIGENDIAN |
| return PyFloat_FromDouble(_PyFloat_Unpack8(ptr, 1)); |
| #else |
| return PyFloat_FromDouble(_PyFloat_Unpack8(ptr, 0)); |
| #endif |
| } |
| |
| static PyObject * |
| f_set(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| float x; |
| |
| x = (float)PyFloat_AsDouble(value); |
| if (x == -1 && PyErr_Occurred()) |
| return NULL; |
| memcpy(ptr, &x, sizeof(x)); |
| _RET(value); |
| } |
| |
| static PyObject * |
| f_get(void *ptr, Py_ssize_t size) |
| { |
| float val; |
| memcpy(&val, ptr, sizeof(val)); |
| return PyFloat_FromDouble(val); |
| } |
| |
| static PyObject * |
| f_set_sw(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| float x; |
| |
| x = (float)PyFloat_AsDouble(value); |
| if (x == -1 && PyErr_Occurred()) |
| return NULL; |
| #ifdef WORDS_BIGENDIAN |
| if (_PyFloat_Pack4(x, (unsigned char *)ptr, 1)) |
| return NULL; |
| #else |
| if (_PyFloat_Pack4(x, (unsigned char *)ptr, 0)) |
| return NULL; |
| #endif |
| _RET(value); |
| } |
| |
| static PyObject * |
| f_get_sw(void *ptr, Py_ssize_t size) |
| { |
| #ifdef WORDS_BIGENDIAN |
| return PyFloat_FromDouble(_PyFloat_Unpack4(ptr, 1)); |
| #else |
| return PyFloat_FromDouble(_PyFloat_Unpack4(ptr, 0)); |
| #endif |
| } |
| |
| /* |
| py_object refcounts: |
| |
| 1. If we have a py_object instance, O_get must Py_INCREF the returned |
| object, of course. If O_get is called from a function result, no py_object |
| instance is created - so callproc.c::GetResult has to call Py_DECREF. |
| |
| 2. The memory block in py_object owns a refcount. So, py_object must call |
| Py_DECREF on destruction. Maybe only when b_needsfree is non-zero. |
| */ |
| static PyObject * |
| O_get(void *ptr, Py_ssize_t size) |
| { |
| PyObject *ob = *(PyObject **)ptr; |
| if (ob == NULL) { |
| if (!PyErr_Occurred()) |
| /* Set an error if not yet set */ |
| PyErr_SetString(PyExc_ValueError, |
| "PyObject is NULL"); |
| return NULL; |
| } |
| Py_INCREF(ob); |
| return ob; |
| } |
| |
| static PyObject * |
| O_set(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| /* Hm, does the memory block need it's own refcount or not? */ |
| *(PyObject **)ptr = value; |
| Py_INCREF(value); |
| return value; |
| } |
| |
| |
| static PyObject * |
| c_set(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| if (PyBytes_Check(value) && PyBytes_GET_SIZE(value) == 1) { |
| *(char *)ptr = PyBytes_AS_STRING(value)[0]; |
| _RET(value); |
| } |
| if (PyByteArray_Check(value) && PyByteArray_GET_SIZE(value) == 1) { |
| *(char *)ptr = PyByteArray_AS_STRING(value)[0]; |
| _RET(value); |
| } |
| if (PyLong_Check(value)) |
| { |
| long longval = PyLong_AS_LONG(value); |
| if (longval < 0 || longval >= 256) |
| goto error; |
| *(char *)ptr = (char)longval; |
| _RET(value); |
| } |
| error: |
| PyErr_Format(PyExc_TypeError, |
| "one character bytes, bytearray or integer expected"); |
| return NULL; |
| } |
| |
| |
| static PyObject * |
| c_get(void *ptr, Py_ssize_t size) |
| { |
| return PyBytes_FromStringAndSize((char *)ptr, 1); |
| } |
| |
| #ifdef CTYPES_UNICODE |
| /* u - a single wchar_t character */ |
| static PyObject * |
| u_set(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| Py_ssize_t len; |
| wchar_t chars[2]; |
| if (!PyUnicode_Check(value)) { |
| PyErr_Format(PyExc_TypeError, |
| "unicode string expected instead of %s instance", |
| value->ob_type->tp_name); |
| return NULL; |
| } else |
| Py_INCREF(value); |
| |
| len = PyUnicode_AsWideChar(value, chars, 2); |
| if (len != 1) { |
| Py_DECREF(value); |
| PyErr_SetString(PyExc_TypeError, |
| "one character unicode string expected"); |
| return NULL; |
| } |
| |
| *(wchar_t *)ptr = chars[0]; |
| Py_DECREF(value); |
| |
| _RET(value); |
| } |
| |
| |
| static PyObject * |
| u_get(void *ptr, Py_ssize_t size) |
| { |
| return PyUnicode_FromWideChar((wchar_t *)ptr, 1); |
| } |
| |
| /* U - a unicode string */ |
| static PyObject * |
| U_get(void *ptr, Py_ssize_t size) |
| { |
| Py_ssize_t len; |
| wchar_t *p; |
| |
| size /= sizeof(wchar_t); /* we count character units here, not bytes */ |
| |
| /* We need 'result' to be able to count the characters with wcslen, |
| since ptr may not be NUL terminated. If the length is smaller (if |
| it was actually NUL terminated, we construct a new one and throw |
| away the result. |
| */ |
| /* chop off at the first NUL character, if any. */ |
| p = (wchar_t*)ptr; |
| for (len = 0; len < size; ++len) { |
| if (!p[len]) |
| break; |
| } |
| |
| return PyUnicode_FromWideChar((wchar_t *)ptr, len); |
| } |
| |
| static PyObject * |
| U_set(void *ptr, PyObject *value, Py_ssize_t length) |
| { |
| Py_UNICODE *wstr; |
| Py_ssize_t size; |
| |
| /* It's easier to calculate in characters than in bytes */ |
| length /= sizeof(wchar_t); |
| |
| if (!PyUnicode_Check(value)) { |
| PyErr_Format(PyExc_TypeError, |
| "unicode string expected instead of %s instance", |
| value->ob_type->tp_name); |
| return NULL; |
| } |
| |
| wstr = PyUnicode_AsUnicodeAndSize(value, &size); |
| if (wstr == NULL) |
| return NULL; |
| if (size > length) { |
| PyErr_Format(PyExc_ValueError, |
| "string too long (%zd, maximum length %zd)", |
| size, length); |
| return NULL; |
| } else if (size < length-1) |
| /* copy terminating NUL character if there is space */ |
| size += 1; |
| |
| if (PyUnicode_AsWideChar(value, (wchar_t *)ptr, size) == -1) { |
| return NULL; |
| } |
| |
| Py_INCREF(value); |
| return value; |
| } |
| |
| #endif |
| |
| static PyObject * |
| s_get(void *ptr, Py_ssize_t size) |
| { |
| Py_ssize_t i; |
| char *p; |
| |
| p = (char *)ptr; |
| for (i = 0; i < size; ++i) { |
| if (*p++ == '\0') |
| break; |
| } |
| |
| return PyBytes_FromStringAndSize((char *)ptr, (Py_ssize_t)i); |
| } |
| |
| static PyObject * |
| s_set(void *ptr, PyObject *value, Py_ssize_t length) |
| { |
| char *data; |
| Py_ssize_t size; |
| |
| if(!PyBytes_Check(value)) { |
| PyErr_Format(PyExc_TypeError, |
| "expected bytes, %s found", |
| value->ob_type->tp_name); |
| return NULL; |
| } |
| |
| data = PyBytes_AS_STRING(value); |
| size = strlen(data); /* XXX Why not Py_SIZE(value)? */ |
| if (size < length) { |
| /* This will copy the terminating NUL character |
| * if there is space for it. |
| */ |
| ++size; |
| } else if (size > length) { |
| PyErr_Format(PyExc_ValueError, |
| "bytes too long (%zd, maximum length %zd)", |
| size, length); |
| return NULL; |
| } |
| /* Also copy the terminating NUL character if there is space */ |
| memcpy((char *)ptr, data, size); |
| |
| _RET(value); |
| } |
| |
| static PyObject * |
| z_set(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| if (value == Py_None) { |
| *(char **)ptr = NULL; |
| Py_INCREF(value); |
| return value; |
| } |
| if (PyBytes_Check(value)) { |
| *(char **)ptr = PyBytes_AsString(value); |
| Py_INCREF(value); |
| return value; |
| } else if (PyLong_Check(value)) { |
| #if SIZEOF_VOID_P == SIZEOF_LONG_LONG |
| *(char **)ptr = (char *)PyLong_AsUnsignedLongLongMask(value); |
| #else |
| *(char **)ptr = (char *)PyLong_AsUnsignedLongMask(value); |
| #endif |
| _RET(value); |
| } |
| PyErr_Format(PyExc_TypeError, |
| "bytes or integer address expected instead of %s instance", |
| value->ob_type->tp_name); |
| return NULL; |
| } |
| |
| static PyObject * |
| z_get(void *ptr, Py_ssize_t size) |
| { |
| /* XXX What about invalid pointers ??? */ |
| if (*(void **)ptr) { |
| return PyBytes_FromStringAndSize(*(char **)ptr, |
| strlen(*(char **)ptr)); |
| } else { |
| Py_RETURN_NONE; |
| } |
| } |
| |
| #ifdef CTYPES_UNICODE |
| static PyObject * |
| Z_set(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| PyObject *keep; |
| wchar_t *buffer; |
| |
| if (value == Py_None) { |
| *(wchar_t **)ptr = NULL; |
| Py_INCREF(value); |
| return value; |
| } |
| if (PyLong_Check(value)) { |
| #if SIZEOF_VOID_P == SIZEOF_LONG_LONG |
| *(wchar_t **)ptr = (wchar_t *)PyLong_AsUnsignedLongLongMask(value); |
| #else |
| *(wchar_t **)ptr = (wchar_t *)PyLong_AsUnsignedLongMask(value); |
| #endif |
| Py_RETURN_NONE; |
| } |
| if (!PyUnicode_Check(value)) { |
| PyErr_Format(PyExc_TypeError, |
| "unicode string or integer address expected instead of %s instance", |
| value->ob_type->tp_name); |
| return NULL; |
| } |
| |
| /* We must create a wchar_t* buffer from the unicode object, |
| and keep it alive */ |
| buffer = PyUnicode_AsWideCharString(value, NULL); |
| if (!buffer) |
| return NULL; |
| keep = PyCapsule_New(buffer, CTYPES_CFIELD_CAPSULE_NAME_PYMEM, pymem_destructor); |
| if (!keep) { |
| PyMem_Free(buffer); |
| return NULL; |
| } |
| *(wchar_t **)ptr = buffer; |
| return keep; |
| } |
| |
| static PyObject * |
| Z_get(void *ptr, Py_ssize_t size) |
| { |
| wchar_t *p; |
| p = *(wchar_t **)ptr; |
| if (p) { |
| return PyUnicode_FromWideChar(p, wcslen(p)); |
| } else { |
| Py_RETURN_NONE; |
| } |
| } |
| #endif |
| |
| #ifdef MS_WIN32 |
| static PyObject * |
| BSTR_set(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| BSTR bstr; |
| |
| /* convert value into a PyUnicodeObject or NULL */ |
| if (Py_None == value) { |
| value = NULL; |
| } else if (!PyUnicode_Check(value)) { |
| PyErr_Format(PyExc_TypeError, |
| "unicode string expected instead of %s instance", |
| value->ob_type->tp_name); |
| return NULL; |
| } |
| |
| /* create a BSTR from value */ |
| if (value) { |
| wchar_t* wvalue; |
| Py_ssize_t wsize; |
| wvalue = PyUnicode_AsUnicodeAndSize(value, &wsize); |
| if (wvalue == NULL) |
| return NULL; |
| if ((unsigned) wsize != wsize) { |
| PyErr_SetString(PyExc_ValueError, "String too long for BSTR"); |
| return NULL; |
| } |
| bstr = SysAllocStringLen(wvalue, (unsigned)wsize); |
| } else |
| bstr = NULL; |
| |
| /* free the previous contents, if any */ |
| if (*(BSTR *)ptr) |
| SysFreeString(*(BSTR *)ptr); |
| |
| /* and store it */ |
| *(BSTR *)ptr = bstr; |
| |
| /* We don't need to keep any other object */ |
| _RET(value); |
| } |
| |
| |
| static PyObject * |
| BSTR_get(void *ptr, Py_ssize_t size) |
| { |
| BSTR p; |
| p = *(BSTR *)ptr; |
| if (p) |
| return PyUnicode_FromWideChar(p, SysStringLen(p)); |
| else { |
| /* Hm, it seems NULL pointer and zero length string are the |
| same in BSTR, see Don Box, p 81 |
| */ |
| Py_RETURN_NONE; |
| } |
| } |
| #endif |
| |
| static PyObject * |
| P_set(void *ptr, PyObject *value, Py_ssize_t size) |
| { |
| void *v; |
| if (value == Py_None) { |
| *(void **)ptr = NULL; |
| _RET(value); |
| } |
| |
| if (!PyLong_Check(value)) { |
| PyErr_SetString(PyExc_TypeError, |
| "cannot be converted to pointer"); |
| return NULL; |
| } |
| |
| #if SIZEOF_VOID_P <= SIZEOF_LONG |
| v = (void *)PyLong_AsUnsignedLongMask(value); |
| #else |
| #if SIZEOF_LONG_LONG < SIZEOF_VOID_P |
| # error "PyLong_AsVoidPtr: sizeof(long long) < sizeof(void*)" |
| #endif |
| v = (void *)PyLong_AsUnsignedLongLongMask(value); |
| #endif |
| |
| if (PyErr_Occurred()) |
| return NULL; |
| |
| *(void **)ptr = v; |
| _RET(value); |
| } |
| |
| static PyObject * |
| P_get(void *ptr, Py_ssize_t size) |
| { |
| if (*(void **)ptr == NULL) { |
| Py_RETURN_NONE; |
| } |
| return PyLong_FromVoidPtr(*(void **)ptr); |
| } |
| |
| static struct fielddesc formattable[] = { |
| { 's', s_set, s_get, &ffi_type_pointer}, |
| { 'b', b_set, b_get, &ffi_type_schar}, |
| { 'B', B_set, B_get, &ffi_type_uchar}, |
| { 'c', c_set, c_get, &ffi_type_schar}, |
| { 'd', d_set, d_get, &ffi_type_double, d_set_sw, d_get_sw}, |
| { 'g', g_set, g_get, &ffi_type_longdouble}, |
| { 'f', f_set, f_get, &ffi_type_float, f_set_sw, f_get_sw}, |
| { 'h', h_set, h_get, &ffi_type_sshort, h_set_sw, h_get_sw}, |
| { 'H', H_set, H_get, &ffi_type_ushort, H_set_sw, H_get_sw}, |
| { 'i', i_set, i_get, &ffi_type_sint, i_set_sw, i_get_sw}, |
| { 'I', I_set, I_get, &ffi_type_uint, I_set_sw, I_get_sw}, |
| /* XXX Hm, sizeof(int) == sizeof(long) doesn't hold on every platform */ |
| /* As soon as we can get rid of the type codes, this is no longer a problem */ |
| #if SIZEOF_LONG == 4 |
| { 'l', l_set, l_get, &ffi_type_sint32, l_set_sw, l_get_sw}, |
| { 'L', L_set, L_get, &ffi_type_uint32, L_set_sw, L_get_sw}, |
| #elif SIZEOF_LONG == 8 |
| { 'l', l_set, l_get, &ffi_type_sint64, l_set_sw, l_get_sw}, |
| { 'L', L_set, L_get, &ffi_type_uint64, L_set_sw, L_get_sw}, |
| #else |
| # error |
| #endif |
| #if SIZEOF_LONG_LONG == 8 |
| { 'q', q_set, q_get, &ffi_type_sint64, q_set_sw, q_get_sw}, |
| { 'Q', Q_set, Q_get, &ffi_type_uint64, Q_set_sw, Q_get_sw}, |
| #else |
| # error |
| #endif |
| { 'P', P_set, P_get, &ffi_type_pointer}, |
| { 'z', z_set, z_get, &ffi_type_pointer}, |
| #ifdef CTYPES_UNICODE |
| { 'u', u_set, u_get, NULL}, /* ffi_type set later */ |
| { 'U', U_set, U_get, &ffi_type_pointer}, |
| { 'Z', Z_set, Z_get, &ffi_type_pointer}, |
| #endif |
| #ifdef MS_WIN32 |
| { 'X', BSTR_set, BSTR_get, &ffi_type_pointer}, |
| { 'v', vBOOL_set, vBOOL_get, &ffi_type_sshort}, |
| #endif |
| #if SIZEOF__BOOL == 1 |
| { '?', bool_set, bool_get, &ffi_type_uchar}, /* Also fallback for no native _Bool support */ |
| #elif SIZEOF__BOOL == SIZEOF_SHORT |
| { '?', bool_set, bool_get, &ffi_type_ushort}, |
| #elif SIZEOF__BOOL == SIZEOF_INT |
| { '?', bool_set, bool_get, &ffi_type_uint, I_set_sw, I_get_sw}, |
| #elif SIZEOF__BOOL == SIZEOF_LONG |
| { '?', bool_set, bool_get, &ffi_type_ulong, L_set_sw, L_get_sw}, |
| #elif SIZEOF__BOOL == SIZEOF_LONG_LONG |
| { '?', bool_set, bool_get, &ffi_type_ulong, Q_set_sw, Q_get_sw}, |
| #endif /* SIZEOF__BOOL */ |
| { 'O', O_set, O_get, &ffi_type_pointer}, |
| { 0, NULL, NULL, NULL}, |
| }; |
| |
| /* |
| Ideas: Implement VARIANT in this table, using 'V' code. |
| Use '?' as code for BOOL. |
| */ |
| |
| struct fielddesc * |
| _ctypes_get_fielddesc(const char *fmt) |
| { |
| static int initialized = 0; |
| struct fielddesc *table = formattable; |
| |
| if (!initialized) { |
| initialized = 1; |
| #ifdef CTYPES_UNICODE |
| if (sizeof(wchar_t) == sizeof(short)) |
| _ctypes_get_fielddesc("u")->pffi_type = &ffi_type_sshort; |
| else if (sizeof(wchar_t) == sizeof(int)) |
| _ctypes_get_fielddesc("u")->pffi_type = &ffi_type_sint; |
| else if (sizeof(wchar_t) == sizeof(long)) |
| _ctypes_get_fielddesc("u")->pffi_type = &ffi_type_slong; |
| #endif |
| } |
| |
| for (; table->code; ++table) { |
| if (table->code == fmt[0]) |
| return table; |
| } |
| return NULL; |
| } |
| |
| typedef struct { char c; char x; } s_char; |
| typedef struct { char c; short x; } s_short; |
| typedef struct { char c; int x; } s_int; |
| typedef struct { char c; long x; } s_long; |
| typedef struct { char c; float x; } s_float; |
| typedef struct { char c; double x; } s_double; |
| typedef struct { char c; long double x; } s_long_double; |
| typedef struct { char c; char *x; } s_char_p; |
| typedef struct { char c; void *x; } s_void_p; |
| |
| /* |
| #define CHAR_ALIGN (sizeof(s_char) - sizeof(char)) |
| #define SHORT_ALIGN (sizeof(s_short) - sizeof(short)) |
| #define LONG_ALIGN (sizeof(s_long) - sizeof(long)) |
| */ |
| #define INT_ALIGN (sizeof(s_int) - sizeof(int)) |
| #define FLOAT_ALIGN (sizeof(s_float) - sizeof(float)) |
| #define DOUBLE_ALIGN (sizeof(s_double) - sizeof(double)) |
| #define LONGDOUBLE_ALIGN (sizeof(s_long_double) - sizeof(long double)) |
| |
| /* #define CHAR_P_ALIGN (sizeof(s_char_p) - sizeof(char*)) */ |
| #define VOID_P_ALIGN (sizeof(s_void_p) - sizeof(void*)) |
| |
| /* |
| #ifdef HAVE_USABLE_WCHAR_T |
| typedef struct { char c; wchar_t x; } s_wchar; |
| typedef struct { char c; wchar_t *x; } s_wchar_p; |
| |
| #define WCHAR_ALIGN (sizeof(s_wchar) - sizeof(wchar_t)) |
| #define WCHAR_P_ALIGN (sizeof(s_wchar_p) - sizeof(wchar_t*)) |
| #endif |
| */ |
| |
| typedef struct { char c; long long x; } s_long_long; |
| #define LONG_LONG_ALIGN (sizeof(s_long_long) - sizeof(long long)) |
| |
| /* from ffi.h: |
| typedef struct _ffi_type |
| { |
| size_t size; |
| unsigned short alignment; |
| unsigned short type; |
| struct _ffi_type **elements; |
| } ffi_type; |
| */ |
| |
| /* align and size are bogus for void, but they must not be zero */ |
| ffi_type ffi_type_void = { 1, 1, FFI_TYPE_VOID }; |
| |
| ffi_type ffi_type_uint8 = { 1, 1, FFI_TYPE_UINT8 }; |
| ffi_type ffi_type_sint8 = { 1, 1, FFI_TYPE_SINT8 }; |
| |
| ffi_type ffi_type_uint16 = { 2, 2, FFI_TYPE_UINT16 }; |
| ffi_type ffi_type_sint16 = { 2, 2, FFI_TYPE_SINT16 }; |
| |
| ffi_type ffi_type_uint32 = { 4, INT_ALIGN, FFI_TYPE_UINT32 }; |
| ffi_type ffi_type_sint32 = { 4, INT_ALIGN, FFI_TYPE_SINT32 }; |
| |
| ffi_type ffi_type_uint64 = { 8, LONG_LONG_ALIGN, FFI_TYPE_UINT64 }; |
| ffi_type ffi_type_sint64 = { 8, LONG_LONG_ALIGN, FFI_TYPE_SINT64 }; |
| |
| ffi_type ffi_type_float = { sizeof(float), FLOAT_ALIGN, FFI_TYPE_FLOAT }; |
| ffi_type ffi_type_double = { sizeof(double), DOUBLE_ALIGN, FFI_TYPE_DOUBLE }; |
| |
| #ifdef ffi_type_longdouble |
| #undef ffi_type_longdouble |
| #endif |
| /* This is already defined on OSX */ |
| ffi_type ffi_type_longdouble = { sizeof(long double), LONGDOUBLE_ALIGN, |
| FFI_TYPE_LONGDOUBLE }; |
| |
| ffi_type ffi_type_pointer = { sizeof(void *), VOID_P_ALIGN, FFI_TYPE_POINTER }; |
| |
| /*---------------- EOF ----------------*/ |