/* Map C struct members to Python object attributes */#include "Python.h"#include "structmember.h"PyObject *PyMember_GetOne(const char *addr, PyMemberDef *l){PyObject *v;addr += l->offset;switch (l->type) {case T_BOOL:v = PyBool_FromLong(*(char*)addr);break;case T_BYTE:v = PyLong_FromLong(*(char*)addr);break;case T_UBYTE:v = PyLong_FromUnsignedLong(*(unsigned char*)addr);break;case T_SHORT:v = PyLong_FromLong(*(short*)addr);break;case T_USHORT:v = PyLong_FromUnsignedLong(*(unsigned short*)addr);break;case T_INT:v = PyLong_FromLong(*(int*)addr);break;case T_UINT:v = PyLong_FromUnsignedLong(*(unsigned int*)addr);break;case T_LONG:v = PyLong_FromLong(*(long*)addr);break;case T_ULONG:v = PyLong_FromUnsignedLong(*(unsigned long*)addr);break;case T_PYSSIZET:v = PyLong_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;}elsev = PyUnicode_FromString(*(char**)addr);break;case T_STRING_INPLACE:v = PyUnicode_FromString((char*)addr);break;case T_CHAR:v = PyUnicode_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;case T_LONGLONG:v = PyLong_FromLongLong(*(long long *)addr);break;case T_ULONGLONG:v = PyLong_FromUnsignedLongLong(*(unsigned long long *)addr);break;case T_NONE:v = Py_None;Py_INCREF(v);break;default:PyErr_SetString(PyExc_SystemError, "bad memberdescr type");v = NULL;}return v;}#define WARN(msg) \do { \if (PyErr_WarnEx(PyExc_RuntimeWarning, msg, 1) < 0) \return -1; \} while (0)intPyMember_SetOne(char *addr, PyMemberDef *l, PyObject *v){PyObject *oldv;addr += l->offset;if ((l->flags & READONLY)){PyErr_SetString(PyExc_AttributeError, "readonly attribute");return -1;}if (v == NULL) {if (l->type == T_OBJECT_EX) {/* Check if the attribute is set. */if (*(PyObject **)addr == NULL) {PyErr_SetString(PyExc_AttributeError, l->name);return -1;}}else if (l->type != T_OBJECT) {PyErr_SetString(PyExc_TypeError,"can't delete numeric/char attribute");return -1;}}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 = PyLong_AsLong(v);if ((long_val == -1) && PyErr_Occurred())return -1;*(char*)addr = (char)long_val;/* XXX: For compatibility, only warn about truncationsfor now. */if ((long_val > CHAR_MAX) || (long_val < CHAR_MIN))WARN("Truncation of value to char");break;}case T_UBYTE:{long long_val = PyLong_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 = PyLong_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 = PyLong_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 = PyLong_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 long)-1) && PyErr_Occurred()) {/* XXX: For compatibility, accept negative int valuesas well. */PyErr_Clear();ulong_val = PyLong_AsLong(v);if ((ulong_val == (unsigned long)-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 valuesas well. */PyErr_Clear();*(unsigned long*)addr = PyLong_AsLong(v);if ((*(unsigned long*)addr == (unsigned long)-1)&& PyErr_Occurred())return -1;WARN("Writing negative value into unsigned field");}break;}case T_PYSSIZET:{*(Py_ssize_t*)addr = PyLong_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: {const char *string;Py_ssize_t len;string = PyUnicode_AsUTF8AndSize(v, &len);if (string == NULL || len != 1) {PyErr_BadArgument();return -1;}*(char*)addr = string[0];break;}case T_STRING:case T_STRING_INPLACE:PyErr_SetString(PyExc_TypeError, "readonly attribute");return -1;case T_LONGLONG:{long long value;*(long long*)addr = value = PyLong_AsLongLong(v);if ((value == -1) && PyErr_Occurred())return -1;break;}case T_ULONGLONG:{unsigned long long value;/* ??? PyLong_AsLongLong accepts an int, but PyLong_AsUnsignedLongLongdoesn't ??? */if (PyLong_Check(v))*(unsigned long long*)addr = value = PyLong_AsUnsignedLongLong(v);else*(unsigned long long*)addr = value = PyLong_AsLong(v);if ((value == (unsigned long long)-1) && PyErr_Occurred())return -1;break;}default:PyErr_Format(PyExc_SystemError,"bad memberdescr type for %s", l->name);return -1;}return 0;}
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