add hg and python

1 files changed, 312 insertions, 0 deletions

diff --git a/sys/src/cmd/python/Python/structmember.c b/sys/src/cmd/python/Python/structmember.c
new file mode 100644
index 000000000..03934c0c8
--- /dev/null
+++ b/sys/src/cmd/python/Python/structmember.c
@@ -0,0 +1,312 @@
+
+/* Map C struct members to Python object attributes */
+
+#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_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_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;
+}
+
+int
+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;
+}
+
+int
+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 & 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_BYTE:{
+		long long_val;
+		long_val = PyInt_AsLong(v);
+		if ((long_val == -1) && PyErr_Occurred())
+			return -1;
+		*(char*)addr = (char)long_val;
+		break;
+		}
+	case T_UBYTE:{
+		long long_val;
+		long_val = PyInt_AsLong(v);
+		if ((long_val == -1) && PyErr_Occurred())
+			return -1;
+		*(unsigned char*)addr = (unsigned char)long_val;
+		break;
+		}
+	case T_SHORT:{
+		long long_val;
+		long_val = PyInt_AsLong(v);
+		if ((long_val == -1) && PyErr_Occurred())
+			return -1;
+		*(short*)addr = (short)long_val;
+		break;
+		}
+	case T_USHORT:{
+		long long_val;
+		long_val = PyInt_AsLong(v);
+		if ((long_val == -1) && PyErr_Occurred())
+			return -1;
+		*(unsigned short*)addr = (unsigned short)long_val;
+		break;
+		}
+  	case T_INT:{
+		long long_val;
+		long_val = PyInt_AsLong(v);
+		if ((long_val == -1) && PyErr_Occurred())
+			return -1;
+		*(int *)addr = (int)long_val;
+		break;
+		}
+	case T_UINT:{
+		unsigned long ulong_val;
+		ulong_val = PyLong_AsUnsignedLong(v);
+		if ((ulong_val == (unsigned int)-1) && PyErr_Occurred()) {
+			/* XXX: For compatibility, accept negative int values
+			   as well. */
+			PyErr_Clear();
+			ulong_val = PyLong_AsLong(v);
+			if ((ulong_val == (unsigned int)-1) && PyErr_Occurred())
+				return -1;
+		}
+		*(unsigned int *)addr = (unsigned int)ulong_val;
+		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
+			   as well. */
+			PyErr_Clear();
+			*(unsigned long*)addr = PyLong_AsLong(v);
+			if ((*(unsigned long*)addr == (unsigned int)-1) && PyErr_Occurred())
+				return -1;
+		}
+		break;
+		}
+	case T_FLOAT:{
+		double double_val;
+		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:
+		if (!PyLong_Check(v)) {
+			PyErr_BadArgument();
+			return -1;
+		} else {
+                        PY_LONG_LONG value;
+                        *(PY_LONG_LONG*)addr = value = PyLong_AsLongLong(v);
+                        if ((value == -1) && PyErr_Occurred()) {
+                                return -1;
+                        }
+                }
+                break;
+	case T_ULONGLONG:
+                if (!PyLong_Check(v)) {
+                        PyErr_BadArgument();
+                        return -1;
+                } else {
+                        unsigned PY_LONG_LONG value;
+                        *(unsigned PY_LONG_LONG*)addr = value = PyLong_AsUnsignedLongLong(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;
+}