tcl.git - Tcl is a high-level, general-purpose, interpreted, dynamic programming language. It was designed with the goal of being very simple but powerful.

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Diffstat (limited to 'generic/tclIntPlatDecls.h')

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/*********************************************************** Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, The Netherlands. All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the names of Stichting Mathematisch Centrum or CWI or Corporation for National Research Initiatives or CNRI not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. While CWI is the initial source for this software, a modified version is made available by the Corporation for National Research Initiatives (CNRI) at the Internet address ftp://ftp.python.org. STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ******************************************************************/ /* Class object implementation */ #include "Python.h" #include "structmember.h" /* Forward */ static PyObject *class_lookup Py_PROTO((PyClassObject *, PyObject *, PyClassObject **)); static PyObject *instance_getattr1 Py_PROTO((PyInstanceObject *, PyObject *)); static PyObject *getattrstr, *setattrstr, *delattrstr; PyObject * PyClass_New(bases, dict, name) PyObject *bases; /* NULL or tuple of classobjects! */ PyObject *dict; PyObject *name; { PyClassObject *op, *dummy; static PyObject *docstr, *modstr, *namestr; if (docstr == NULL) { docstr= PyString_InternFromString("__doc__"); if (docstr == NULL) return NULL; } if (modstr == NULL) { modstr= PyString_InternFromString("__module__"); if (modstr == NULL) return NULL; } if (namestr == NULL) { namestr= PyString_InternFromString("__name__"); if (namestr == NULL) return NULL; } if (name == NULL || !PyString_Check(name)) { PyErr_SetString(PyExc_SystemError, "PyClass_New: name must be a string"); return NULL; } if (dict == NULL || !PyDict_Check(dict)) { PyErr_SetString(PyExc_SystemError, "PyClass_New: dict must be a dictionary"); return NULL; } if (PyDict_GetItem(dict, docstr) == NULL) { if (PyDict_SetItem(dict, docstr, Py_None) < 0) return NULL; } if (PyDict_GetItem(dict, modstr) == NULL) { PyObject *globals = PyEval_GetGlobals(); if (globals != NULL) { PyObject *modname = PyDict_GetItem(globals, namestr); if (modname != NULL) { if (PyDict_SetItem(dict, modstr, modname) < 0) return NULL; } } } if (bases == NULL) { bases = PyTuple_New(0); if (bases == NULL) return NULL; } else { int i; if (!PyTuple_Check(bases)) { PyErr_SetString(PyExc_SystemError, "PyClass_New: bases must be a tuple"); return NULL; } i = PyTuple_Size(bases); while (--i >= 0) { if (!PyClass_Check(PyTuple_GetItem(bases, i))) { PyErr_SetString(PyExc_SystemError, "PyClass_New: base must be a class"); return NULL; } } Py_INCREF(bases); } op = PyObject_NEW(PyClassObject, &PyClass_Type); if (op == NULL) { Py_DECREF(bases); return NULL; } op->cl_bases = bases; Py_INCREF(dict); op->cl_dict = dict; Py_XINCREF(name); op->cl_name = name; if (getattrstr == NULL) { getattrstr = PyString_InternFromString("__getattr__"); setattrstr = PyString_InternFromString("__setattr__"); delattrstr = PyString_InternFromString("__delattr__"); } op->cl_getattr = class_lookup(op, getattrstr, &dummy); op->cl_setattr = class_lookup(op, setattrstr, &dummy); op->cl_delattr = class_lookup(op, delattrstr, &dummy); Py_XINCREF(op->cl_getattr); Py_XINCREF(op->cl_setattr); Py_XINCREF(op->cl_delattr); return (PyObject *) op; } /* Class methods */ static void class_dealloc(op) PyClassObject *op; { Py_DECREF(op->cl_bases); Py_DECREF(op->cl_dict); Py_XDECREF(op->cl_name); Py_XDECREF(op->cl_getattr); Py_XDECREF(op->cl_setattr); Py_XDECREF(op->cl_delattr); free((ANY *)op); } static PyObject * class_lookup(cp, name, pclass) PyClassObject *cp; PyObject *name; PyClassObject **pclass; { int i, n; PyObject *value = PyDict_GetItem(cp->cl_dict, name); if (value != NULL) { *pclass = cp; return value; } n = PyTuple_Size(cp->cl_bases); for (i = 0; i < n; i++) { /* XXX What if one of the bases is not a class? */ PyObject *v = class_lookup( (PyClassObject *) PyTuple_GetItem(cp->cl_bases, i), name, pclass); if (v != NULL) return v; } return NULL; } static PyObject * class_getattr(op, name) register PyClassObject *op; PyObject *name; { register PyObject *v; register char *sname = PyString_AsString(name); PyClassObject *class; if (sname[0] == '_' && sname[1] == '_') { if (strcmp(sname, "__dict__") == 0) { if (PyEval_GetRestricted()) { PyErr_SetString(PyExc_RuntimeError, "class.__dict__ not accessible in restricted mode"); return NULL; } Py_INCREF(op->cl_dict); return op->cl_dict; } if (strcmp(sname, "__bases__") == 0) { Py_INCREF(op->cl_bases); return op->cl_bases; } if (strcmp(sname, "__name__") == 0) { if (op->cl_name == NULL) v = Py_None; else v = op->cl_name; Py_INCREF(v); return v; } } v = class_lookup(op, name, &class); if (v == NULL) { PyErr_SetObject(PyExc_AttributeError, name); return NULL; } Py_INCREF(v); if (PyFunction_Check(v)) { PyObject *w = PyMethod_New(v, (PyObject *)NULL, (PyObject *)class); Py_DECREF(v); v = w; } return v; } static void set_slot(slot, v) PyObject **slot; PyObject *v; { PyObject *temp = *slot; Py_XINCREF(v); *slot = v; Py_XDECREF(temp); } static void set_attr_slots(c) PyClassObject *c; { PyClassObject *dummy; set_slot(&c->cl_getattr, class_lookup(c, getattrstr, &dummy)); set_slot(&c->cl_setattr, class_lookup(c, setattrstr, &dummy)); set_slot(&c->cl_delattr, class_lookup(c, delattrstr, &dummy)); } static char * set_dict(c, v) PyClassObject *c; PyObject *v; { if (v == NULL || !PyDict_Check(v)) return "__dict__ must be a dictionary object"; set_slot(&c->cl_dict, v); set_attr_slots(c); return ""; } static char * set_bases(c, v) PyClassObject *c; PyObject *v; { int i, n; if (v == NULL || !PyTuple_Check(v)) return "__bases__ must be a tuple object"; n = PyTuple_Size(v); for (i = 0; i < n; i++) { PyObject *x = PyTuple_GET_ITEM(v, i); if (!PyClass_Check(x)) return "__bases__ items must be classes"; if (PyClass_IsSubclass(x, (PyObject *)c)) return "a __bases__ item causes an inheritance cycle"; } set_slot(&c->cl_bases, v); set_attr_slots(c); return ""; } static char * set_name(c, v) PyClassObject *c; PyObject *v; { if (v == NULL || !PyString_Check(v)) return "__name__ must be a string object"; if ((long)strlen(PyString_AS_STRING(v)) != PyString_GET_SIZE(v)) return "__name__ must not contain null bytes"; set_slot(&c->cl_name, v); return ""; } static int class_setattr(op, name, v) PyClassObject *op; PyObject *name; PyObject *v; { char *sname; if (PyEval_GetRestricted()) { PyErr_SetString(PyExc_RuntimeError, "classes are read-only in restricted mode"); return -1; } sname = PyString_AsString(name); if (sname[0] == '_' && sname[1] == '_') { int n = PyString_Size(name); if (sname[n-1] == '_' && sname[n-2] == '_') { char *err = NULL; if (strcmp(sname, "__dict__") == 0) err = set_dict(op, v); else if (strcmp(sname, "__bases__") == 0) err = set_bases(op, v); else if (strcmp(sname, "__name__") == 0) err = set_name(op, v); else if (strcmp(sname, "__getattr__") == 0) set_slot(&op->cl_getattr, v); else if (strcmp(sname, "__setattr__") == 0) set_slot(&op->cl_setattr, v); else if (strcmp(sname, "__delattr__") == 0) set_slot(&op->cl_delattr, v); /* For the last three, we fall through to update the dictionary as well. */ if (err != NULL) { if (*err == '\0') return 0; PyErr_SetString(PyExc_TypeError, err); return -1; } } } if (v == NULL) { int rv = PyDict_DelItem(op->cl_dict, name); if (rv < 0) PyErr_SetString(PyExc_AttributeError, "delete non-existing class attribute"); return rv; } else return PyDict_SetItem(op->cl_dict, name, v); } static PyObject * class_repr(op) PyClassObject *op; { PyObject *mod = PyDict_GetItemString(op->cl_dict, "__module__"); char buf[140]; char *name; if (op->cl_name == NULL || !PyString_Check(op->cl_name)) name = "?"; else name = PyString_AsString(op->cl_name); if (mod == NULL || !PyString_Check(mod)) sprintf(buf, "<class ?.%.100s at %lx>", name, (long)op); else sprintf(buf, "<class %.50s.%.50s at %lx>", PyString_AsString(mod), name, (long)op); return PyString_FromString(buf); } static PyObject * class_str(op) PyClassObject *op; { PyObject *mod = PyDict_GetItemString(op->cl_dict, "__module__"); PyObject *name = op->cl_name; PyObject *res; int m, n; if (name == NULL || !PyString_Check(name)) return class_repr(op); if (mod == NULL || !PyString_Check(mod)) { Py_INCREF(name); return name; } m = PyString_Size(mod); n = PyString_Size(name); res = PyString_FromStringAndSize((char *)NULL, m+1+n); if (res != NULL) { char *s = PyString_AsString(res); memcpy(s, PyString_AsString(mod), m); s += m; *s++ = '.'; memcpy(s, PyString_AsString(name), n); } return res; } PyTypeObject PyClass_Type = { PyObject_HEAD_INIT(&PyType_Type) 0, "class", sizeof(PyClassObject), 0, (destructor)class_dealloc, /*tp_dealloc*/ 0, /*tp_print*/ 0, /*tp_getattr*/ 0, /*tp_setattr*/ 0, /*tp_compare*/ (reprfunc)class_repr, /*tp_repr*/ 0, /*tp_as_number*/ 0, /*tp_as_sequence*/ 0, /*tp_as_mapping*/ 0, /*tp_hash*/ 0, /*tp_call*/ (reprfunc)class_str, /*tp_str*/ (getattrofunc)class_getattr, /*tp_getattro*/ (setattrofunc)class_setattr, /*tp_setattro*/ }; int PyClass_IsSubclass(class, base) PyObject *class; PyObject *base; { int i, n; PyClassObject *cp; if (class == base) return 1; if (class == NULL || !PyClass_Check(class)) return 0; cp = (PyClassObject *)class; n = PyTuple_Size(cp->cl_bases); for (i = 0; i < n; i++) { if (PyClass_IsSubclass(PyTuple_GetItem(cp->cl_bases, i), base)) return 1; } return 0; } /* Instance objects */ PyObject * PyInstance_New(class, arg, kw) PyObject *class; PyObject *arg; PyObject *kw; { register PyInstanceObject *inst; PyObject *init; static PyObject *initstr; if (!PyClass_Check(class)) { PyErr_BadInternalCall(); return NULL; } inst = PyObject_NEW(PyInstanceObject, &PyInstance_Type); if (inst == NULL) return NULL; Py_INCREF(class); inst->in_class = (PyClassObject *)class; inst->in_dict = PyDict_New(); if (inst->in_dict == NULL) { Py_DECREF(inst); return NULL; } if (initstr == NULL) initstr = PyString_InternFromString("__init__"); init = instance_getattr1(inst, initstr); if (init == NULL) { PyErr_Clear(); if ((arg != NULL && (!PyTuple_Check(arg) || PyTuple_Size(arg) != 0)) || (kw != NULL && (!PyDict_Check(kw) || PyDict_Size(kw) != 0))) { PyErr_SetString(PyExc_TypeError, "this constructor takes no arguments"); Py_DECREF(inst); inst = NULL; } } else { PyObject *res = PyEval_CallObjectWithKeywords(init, arg, kw); Py_DECREF(init); if (res == NULL) { Py_DECREF(inst); inst = NULL; } else { if (res != Py_None) { PyErr_SetString(PyExc_TypeError, "__init__() should return None"); Py_DECREF(inst); inst = NULL; } Py_DECREF(res); } } return (PyObject *)inst; } /* Instance methods */ static void instance_dealloc(inst) register PyInstanceObject *inst; { PyObject *error_type, *error_value, *error_traceback; PyObject *del; static PyObject *delstr; /* Call the __del__ method if it exists. First temporarily revive the object and save the current exception, if any. */ #ifdef Py_TRACE_REFS /* much too complicated if Py_TRACE_REFS defined */ extern long _Py_RefTotal; inst->ob_type = &PyInstance_Type; _Py_NewReference(inst); _Py_RefTotal--; /* compensate for increment in NEWREF */ #ifdef COUNT_ALLOCS inst->ob_type->tp_alloc--; /* ditto */ #endif #else /* !Py_TRACE_REFS */ Py_INCREF(inst); #endif /* !Py_TRACE_REFS */ PyErr_Fetch(&error_type, &error_value, &error_traceback); if (delstr == NULL) delstr = PyString_InternFromString("__del__"); if ((del = instance_getattr1(inst, delstr)) != NULL) { PyObject *res = PyEval_CallObject(del, (PyObject *)NULL); if (res == NULL) { PyObject *f, *t, *v, *tb; PyErr_Fetch(&t, &v, &tb); f = PySys_GetObject("stderr"); if (f != NULL) { PyFile_WriteString("Exception ", f); if (t) { PyFile_WriteObject(t, f, Py_PRINT_RAW); if (v && v != Py_None) { PyFile_WriteString(": ", f); PyFile_WriteObject(v, f, 0); } } PyFile_WriteString(" in ", f); PyFile_WriteObject(del, f, 0); PyFile_WriteString(" ignored\n", f); PyErr_Clear(); /* Just in case */ } Py_XDECREF(t); Py_XDECREF(v); Py_XDECREF(tb); } else Py_DECREF(res); Py_DECREF(del); } /* Restore the saved exception and undo the temporary revival */ PyErr_Restore(error_type, error_value, error_traceback); /* Can't use DECREF here, it would cause a recursive call */ if (--inst->ob_refcnt > 0) { #ifdef COUNT_ALLOCS inst->ob_type->tp_free--; #endif return; /* __del__ added a reference; don't delete now */ } #ifdef Py_TRACE_REFS #ifdef COUNT_ALLOCS inst->ob_type->tp_free--; /* compensate for increment in UNREF */ #endif _Py_ForgetReference(inst); inst->ob_type = NULL; #endif /* Py_TRACE_REFS */ Py_DECREF(inst->in_class); Py_XDECREF(inst->in_dict); free((ANY *)inst); } static PyObject * instance_getattr1(inst, name) register PyInstanceObject *inst; PyObject *name; { register PyObject *v; register char *sname = PyString_AsString(name); PyClassObject *class; if (sname[0] == '_' && sname[1] == '_') { if (strcmp(sname, "__dict__") == 0) { if (PyEval_GetRestricted()) { PyErr_SetString(PyExc_RuntimeError, "instance.__dict__ not accessible in restricted mode"); return NULL; } Py_INCREF(inst->in_dict); return inst->in_dict; } if (strcmp(sname, "__class__") == 0) { Py_INCREF(inst->in_class); return (PyObject *)inst->in_class; } } class = NULL; v = PyDict_GetItem(inst->in_dict, name); if (v == NULL) { v = class_lookup(inst->in_class, name, &class); if (v == NULL) { PyErr_SetObject(PyExc_AttributeError, name); return NULL; } } Py_INCREF(v); if (class != NULL) { if (PyFunction_Check(v)) { PyObject *w = PyMethod_New(v, (PyObject *)inst, (PyObject *)class); Py_DECREF(v); v = w; } else if (PyMethod_Check(v)) { PyObject *im_class = PyMethod_Class(v); /* Only if classes are compatible */ if (PyClass_IsSubclass((PyObject *)class, im_class)) { PyObject *im_func = PyMethod_Function(v); PyObject *w = PyMethod_New(im_func, (PyObject *)inst, im_class); Py_DECREF(v); v = w; } } } return v; } static PyObject * instance_getattr(inst, name) register PyInstanceObject *inst; PyObject *name; { register PyObject *func, *res; res = instance_getattr1(inst, name); if (res == NULL && (func = inst->in_class->cl_getattr) != NULL) { PyObject *args; PyErr_Clear(); args = Py_BuildValue("(OO)", inst, name); if (args == NULL) return NULL; res = PyEval_CallObject(func, args); Py_DECREF(args); } return res; } static int instance_setattr1(inst, name, v) PyInstanceObject *inst; PyObject *name; PyObject *v; { if (v == NULL) { int rv = PyDict_DelItem(inst->in_dict, name); if (rv < 0) PyErr_SetString(PyExc_AttributeError, "delete non-existing instance attribute"); return rv; } else return PyDict_SetItem(inst->in_dict, name, v); } static int instance_setattr(inst, name, v) PyInstanceObject *inst; PyObject *name; PyObject *v; { PyObject *func, *args, *res, *tmp; char *sname = PyString_AsString(name); if (sname[0] == '_' && sname[1] == '_') { int n = PyString_Size(name); if (sname[n-1] == '_' && sname[n-2] == '_') { if (strcmp(sname, "__dict__") == 0) { if (PyEval_GetRestricted()) { PyErr_SetString(PyExc_RuntimeError, "__dict__ not accessible in restricted mode"); return -1; } if (v == NULL || !PyDict_Check(v)) { PyErr_SetString(PyExc_TypeError, "__dict__ must be set to a dictionary"); return -1; } tmp = inst->in_dict; Py_INCREF(v); inst->in_dict = v; Py_DECREF(tmp); return 0; } if (strcmp(sname, "__class__") == 0) { if (PyEval_GetRestricted()) { PyErr_SetString(PyExc_RuntimeError, "__class__ not accessible in restricted mode"); return -1; } if (v == NULL || !PyClass_Check(v)) { PyErr_SetString(PyExc_TypeError, "__class__ must be set to a class"); return -1; } tmp = (PyObject *)(inst->in_class); Py_INCREF(v); inst->in_class = (PyClassObject *)v; Py_DECREF(tmp); return 0; } } } if (v == NULL) func = inst->in_class->cl_delattr; else func = inst->in_class->cl_setattr; if (func == NULL) return instance_setattr1(inst, name, v); if (v == NULL) args = Py_BuildValue("(OO)", inst, name); else args = Py_BuildValue("(OOO)", inst, name, v); if (args == NULL) return -1; res = PyEval_CallObject(func, args); Py_DECREF(args); if (res == NULL) return -1; Py_DECREF(res); return 0; } static PyObject * instance_repr(inst) PyInstanceObject *inst; { PyObject *func; PyObject *res; static PyObject *reprstr; if (reprstr == NULL) reprstr = PyString_InternFromString("__repr__"); func = instance_getattr(inst, reprstr); if (func == NULL) { char buf[140]; PyObject *classname = inst->in_class->cl_name; PyObject *mod = PyDict_GetItemString( inst->in_class->cl_dict, "__module__"); char *cname; if (classname != NULL && PyString_Check(classname)) cname = PyString_AsString(classname); else cname = "?"; PyErr_Clear(); if (mod == NULL || !PyString_Check(mod)) sprintf(buf, "<?.%.100s instance at %lx>", cname, (long)inst); else sprintf(buf, "<%.50s.%.50s instance at %lx>", PyString_AsString(mod), cname, (long)inst); return PyString_FromString(buf); } res = PyEval_CallObject(func, (PyObject *)NULL); Py_DECREF(func); return res; } static PyObject * instance_compare1(inst, other) PyObject *inst, *other; { return PyInstance_DoBinOp(inst, other, "__cmp__", "__rcmp__", instance_compare1); } static int instance_compare(inst, other) PyObject *inst, *other; { PyObject *result; long outcome; result = instance_compare1(inst, other); if (result == NULL) return -1; if (!PyInt_Check(result)) { Py_DECREF(result); PyErr_SetString(PyExc_TypeError, "comparison did not return an int"); return -1; } outcome = PyInt_AsLong(result); Py_DECREF(result); if (outcome < 0) return -1; else if (outcome > 0) return 1; return 0; } static long instance_hash(inst) PyInstanceObject *inst; { PyObject *func; PyObject *res; long outcome; static PyObject *hashstr, *cmpstr; if (hashstr == NULL) hashstr = PyString_InternFromString("__hash__"); func = instance_getattr(inst, hashstr); if (func == NULL) { /* If there is no __cmp__ method, we hash on the address. If a __cmp__ method exists, there must be a __hash__. */ PyErr_Clear(); if (cmpstr == NULL) cmpstr = PyString_InternFromString("__cmp__"); func = instance_getattr(inst, cmpstr); if (func == NULL) { PyErr_Clear(); outcome = (long)inst; if (outcome == -1) outcome = -2; return outcome; } PyErr_SetString(PyExc_TypeError, "unhashable instance"); return -1; } res = PyEval_CallObject(func, (PyObject *)NULL); Py_DECREF(func); if (res == NULL) return -1; if (PyInt_Check(res)) { outcome = PyInt_AsLong(res); if (outcome == -1) outcome = -2; } else { PyErr_SetString(PyExc_TypeError, "__hash__() should return an int"); outcome = -1; } Py_DECREF(res); return outcome; } static PyObject *getitemstr, *setitemstr, *delitemstr, *lenstr; static int instance_length(inst) PyInstanceObject *inst; { PyObject *func; PyObject *res; int outcome; if (lenstr == NULL) lenstr = PyString_InternFromString("__len__"); func = instance_getattr(inst, lenstr); if (func == NULL) return -1; res = PyEval_CallObject(func, (PyObject *)NULL); Py_DECREF(func); if (res == NULL) return -1; if (PyInt_Check(res)) { outcome = PyInt_AsLong(res); if (outcome < 0) PyErr_SetString(PyExc_ValueError, "__len__() should return >= 0"); } else { PyErr_SetString(PyExc_TypeError, "__len__() should return an int"); outcome = -1; } Py_DECREF(res); return outcome; } static PyObject * instance_subscript(inst, key) PyInstanceObject *inst; PyObject *key; { PyObject *func; PyObject *arg; PyObject *res; if (getitemstr == NULL) getitemstr = PyString_InternFromString("__getitem__"); func = instance_getattr(inst, getitemstr); if (func == NULL) return NULL; arg = Py_BuildValue("(O)", key); if (arg == NULL) { Py_DECREF(func); return NULL; } res = PyEval_CallObject(func, arg); Py_DECREF(func); Py_DECREF(arg); return res; } static int instance_ass_subscript(inst, key, value) PyInstanceObject*inst; PyObject *key; PyObject *value; { PyObject *func; PyObject *arg; PyObject *res; if (value == NULL) { if (delitemstr == NULL) delitemstr = PyString_InternFromString("__delitem__"); func = instance_getattr(inst, delitemstr); } else { if (setitemstr == NULL) setitemstr = PyString_InternFromString("__setitem__"); func = instance_getattr(inst, setitemstr); } if (func == NULL) return -1; if (value == NULL) arg = Py_BuildValue("(O)", key); else arg = Py_BuildValue("(OO)", key, value); if (arg == NULL) { Py_DECREF(func); return -1; } res = PyEval_CallObject(func, arg); Py_DECREF(func); Py_DECREF(arg); if (res == NULL) return -1; Py_DECREF(res); return 0; } static PyMappingMethods instance_as_mapping = { (inquiry)instance_length, /*mp_length*/ (binaryfunc)instance_subscript, /*mp_subscript*/ (objobjargproc)instance_ass_subscript, /*mp_ass_subscript*/ }; static PyObject * instance_item(inst, i) PyInstanceObject *inst; int i; { PyObject *func, *arg, *res; if (getitemstr == NULL) getitemstr = PyString_InternFromString("__getitem__"); func = instance_getattr(inst, getitemstr); if (func == NULL) return NULL; arg = Py_BuildValue("(i)", i); if (arg == NULL) { Py_DECREF(func); return NULL; } res = PyEval_CallObject(func, arg); Py_DECREF(func); Py_DECREF(arg); return res; } static PyObject * instance_slice(inst, i, j) PyInstanceObject *inst; int i, j; { PyObject *func, *arg, *res; static PyObject *getslicestr; if (getslicestr == NULL) getslicestr = PyString_InternFromString("__getslice__"); func = instance_getattr(inst, getslicestr); if (func == NULL) return NULL; arg = Py_BuildValue("(ii)", i, j); if (arg == NULL) { Py_DECREF(func); return NULL; } res = PyEval_CallObject(func, arg); Py_DECREF(func); Py_DECREF(arg); return res; } static int instance_ass_item(inst, i, item) PyInstanceObject *inst; int i; PyObject *item; { PyObject *func, *arg, *res; if (item == NULL) { if (delitemstr == NULL) delitemstr = PyString_InternFromString("__delitem__"); func = instance_getattr(inst, delitemstr); } else { if (setitemstr == NULL) setitemstr = PyString_InternFromString("__setitem__"); func = instance_getattr(inst, setitemstr); } if (func == NULL) return -1; if (item == NULL) arg = Py_BuildValue("i", i); else arg = Py_BuildValue("(iO)", i, item); if (arg == NULL) { Py_DECREF(func); return -1; } res = PyEval_CallObject(func, arg); Py_DECREF(func); Py_DECREF(arg); if (res == NULL) return -1; Py_DECREF(res); return 0; } static int instance_ass_slice(inst, i, j, value) PyInstanceObject *inst; int i, j; PyObject *value; { PyObject *func, *arg, *res; static PyObject *setslicestr, *delslicestr; if (value == NULL) { if (delslicestr == NULL) delslicestr = PyString_InternFromString("__delslice__"); func = instance_getattr(inst, delslicestr); } else { if (setslicestr == NULL) setslicestr = PyString_InternFromString("__setslice__"); func = instance_getattr(inst, setslicestr); } if (func == NULL) return -1; if (value == NULL) arg = Py_BuildValue("(ii)", i, j); else arg = Py_BuildValue("(iiO)", i, j, value); if (arg == NULL) { Py_DECREF(func); return -1; } res = PyEval_CallObject(func, arg); Py_DECREF(func); Py_DECREF(arg); if (res == NULL) return -1; Py_DECREF(res); return 0; } static PySequenceMethods instance_as_sequence = { (inquiry)instance_length, /*sq_length*/ 0, /*sq_concat*/ 0, /*sq_repeat*/ (intargfunc)instance_item, /*sq_item*/ (intintargfunc)instance_slice, /*sq_slice*/ (intobjargproc)instance_ass_item, /*sq_ass_item*/ (intintobjargproc)instance_ass_slice, /*sq_ass_slice*/ }; static PyObject * generic_unary_op(self, methodname) PyInstanceObject *self; PyObject *methodname; { PyObject *func, *res; if ((func = instance_getattr(self, methodname)) == NULL) return NULL; res = PyEval_CallObject(func, (PyObject *)NULL); Py_DECREF(func); return res; } /* Forward */ static int halfbinop Py_PROTO((PyObject *, PyObject *, char *, PyObject **, PyObject * (*) Py_PROTO((PyObject *, PyObject *)), int )); /* Implement a binary operator involving at least one class instance. */ PyObject * PyInstance_DoBinOp(v, w, opname, ropname, thisfunc) PyObject *v; PyObject *w; char *opname; char *ropname; PyObject * (*thisfunc) Py_PROTO((PyObject *, PyObject *)); { char buf[256]; PyObject *result = NULL; if (halfbinop(v, w, opname, &result, thisfunc, 0) <= 0) return result; if (halfbinop(w, v, ropname, &result, thisfunc, 1) <= 0) return result; /* Sigh -- special case for comnparisons */ if (strcmp(opname, "__cmp__") == 0) { long c = (v < w) ? -1 : (v > w) ? 1 : 0; return PyInt_FromLong(c); } sprintf(buf, "%s nor %s defined for these operands", opname, ropname); PyErr_SetString(PyExc_TypeError, buf); return NULL; } /* Try one half of a binary operator involving a class instance. Return value: -1 if an exception is to be reported right away 0 if we have a valid result 1 if we could try another operation */ static PyObject *coerce_obj; static int halfbinop(v, w, opname, r_result, thisfunc, swapped) PyObject *v; PyObject *w; char *opname; PyObject **r_result; PyObject * (*thisfunc) Py_PROTO((PyObject *, PyObject *)); int swapped; { PyObject *func; PyObject *args; PyObject *coercefunc; PyObject *coerced = NULL; PyObject *v1; if (!PyInstance_Check(v)) return 1; if (coerce_obj == NULL) { coerce_obj = PyString_InternFromString("__coerce__"); if (coerce_obj == NULL) return -1; } coercefunc = PyObject_GetAttr(v, coerce_obj); if (coercefunc == NULL) { PyErr_Clear(); } else { args = Py_BuildValue("(O)", w); if (args == NULL) { return -1; } coerced = PyEval_CallObject(coercefunc, args); Py_DECREF(args); Py_DECREF(coercefunc); if (coerced == NULL) { return -1; } if (coerced == Py_None) { Py_DECREF(coerced); return 1; } if (!PyTuple_Check(coerced) || PyTuple_Size(coerced) != 2) { Py_DECREF(coerced); PyErr_SetString(PyExc_TypeError, "coercion should return None or 2-tuple"); return -1; } v1 = PyTuple_GetItem(coerced, 0); w = PyTuple_GetItem(coerced, 1); if (v1 != v) { v = v1; if (!PyInstance_Check(v) && !PyInstance_Check(w)) { if (swapped) *r_result = (*thisfunc)(w, v); else *r_result = (*thisfunc)(v, w); Py_DECREF(coerced); return *r_result == NULL ? -1 : 0; } } } func = PyObject_GetAttrString(v, opname); if (func == NULL) { Py_XDECREF(coerced); if (!PyErr_ExceptionMatches(PyExc_AttributeError)) return -1; PyErr_Clear(); return 1; } args = Py_BuildValue("(O)", w); if (args == NULL) { Py_DECREF(func); Py_XDECREF(coerced); return -1; } *r_result = PyEval_CallObject(func, args); Py_DECREF(args); Py_DECREF(func); Py_XDECREF(coerced); return *r_result == NULL ? -1 : 0; } static int instance_coerce(pv, pw) PyObject **pv; PyObject **pw; { PyObject *v = *pv; PyObject *w = *pw; PyObject *coercefunc; PyObject *args; PyObject *coerced; if (coerce_obj == NULL) { coerce_obj = PyString_InternFromString("__coerce__"); if (coerce_obj == NULL) return -1; } coercefunc = PyObject_GetAttr(v, coerce_obj); if (coercefunc == NULL) { /* No __coerce__ method: always OK */ PyErr_Clear(); Py_INCREF(v); Py_INCREF(w); return 0; } /* Has __coerce__ method: call it */ args = Py_BuildValue("(O)", w); if (args == NULL) { return -1; } coerced = PyEval_CallObject(coercefunc, args); Py_DECREF(args); Py_DECREF(coercefunc); if (coerced == NULL) { /* __coerce__ call raised an exception */ return -1; } if (coerced == Py_None) { /* __coerce__ says "I can't do it" */ Py_DECREF(coerced); return 1; } if (!PyTuple_Check(coerced) || PyTuple_Size(coerced) != 2) { /* __coerce__ return value is malformed */ Py_DECREF(coerced); PyErr_SetString(PyExc_TypeError, "coercion should return None or 2-tuple"); return -1; } /* __coerce__ returned two new values */ *pv = PyTuple_GetItem(coerced, 0); *pw = PyTuple_GetItem(coerced, 1); Py_INCREF(*pv); Py_INCREF(*pw); Py_DECREF(coerced); return 0; } #define UNARY(funcname, methodname) \ static PyObject *funcname(self) PyInstanceObject *self; { \ static PyObject *o; \ if (o == NULL) o = PyString_InternFromString(methodname); \ return generic_unary_op(self, o); \ } UNARY(instance_neg, "__neg__") UNARY(instance_pos, "__pos__") UNARY(instance_abs, "__abs__") static int instance_nonzero(self) PyInstanceObject *self; { PyObject *func, *res; long outcome; static PyObject *nonzerostr; if (nonzerostr == NULL) nonzerostr = PyString_InternFromString("__nonzero__"); if ((func = instance_getattr(self, nonzerostr)) == NULL) { PyErr_Clear(); if (lenstr == NULL) lenstr = PyString_InternFromString("__len__"); if ((func = instance_getattr(self, lenstr)) == NULL) { PyErr_Clear(); /* Fall back to the default behavior: all instances are nonzero */ return 1; } } res = PyEval_CallObject(func, (PyObject *)NULL); Py_DECREF(func); if (res == NULL) return -1; if (!PyInt_Check(res)) { Py_DECREF(res); PyErr_SetString(PyExc_TypeError, "__nonzero__ should return an int"); return -1; } outcome = PyInt_AsLong(res); Py_DECREF(res); if (outcome < 0) { PyErr_SetString(PyExc_ValueError, "__nonzero__ should return >= 0"); return -1; } return outcome > 0; } UNARY(instance_invert, "__invert__") UNARY(instance_int, "__int__") UNARY(instance_long, "__long__") UNARY(instance_float, "__float__") UNARY(instance_oct, "__oct__") UNARY(instance_hex, "__hex__") /* This version is for ternary calls only (z != None) */ static PyObject * instance_pow(v, w, z) PyObject *v; PyObject *w; PyObject *z; { /* XXX Doesn't do coercions... */ PyObject *func; PyObject *args; PyObject *result; static PyObject *powstr; if (powstr == NULL) powstr = PyString_InternFromString("__pow__"); func = PyObject_GetAttr(v, powstr); if (func == NULL) return NULL; args = Py_BuildValue("(OO)", w, z); if (args == NULL) { Py_DECREF(func); return NULL; } result = PyEval_CallObject(func, args); Py_DECREF(func); Py_DECREF(args); return result; } static PyNumberMethods instance_as_number = { 0, /*nb_add*/ 0, /*nb_subtract*/ 0, /*nb_multiply*/ 0, /*nb_divide*/ 0, /*nb_remainder*/ 0, /*nb_divmod*/ (ternaryfunc)instance_pow, /*nb_power*/ (unaryfunc)instance_neg, /*nb_negative*/ (unaryfunc)instance_pos, /*nb_positive*/ (unaryfunc)instance_abs, /*nb_absolute*/ (inquiry)instance_nonzero, /*nb_nonzero*/ (unaryfunc)instance_invert, /*nb_invert*/ 0, /*nb_lshift*/ 0, /*nb_rshift*/ 0, /*nb_and*/ 0, /*nb_xor*/ 0, /*nb_or*/ (coercion)instance_coerce, /*nb_coerce*/ (unaryfunc)instance_int, /*nb_int*/ (unaryfunc)instance_long, /*nb_long*/ (unaryfunc)instance_float, /*nb_float*/ (unaryfunc)instance_oct, /*nb_oct*/ (unaryfunc)instance_hex, /*nb_hex*/ }; PyTypeObject PyInstance_Type = { PyObject_HEAD_INIT(&PyType_Type) 0, "instance", sizeof(PyInstanceObject), 0, (destructor)instance_dealloc, /*tp_dealloc*/ 0, /*tp_print*/ 0, /*tp_getattr*/ 0, /*tp_setattr*/ instance_compare, /*tp_compare*/ (reprfunc)instance_repr, /*tp_repr*/ &instance_as_number, /*tp_as_number*/ &instance_as_sequence, /*tp_as_sequence*/ &instance_as_mapping, /*tp_as_mapping*/ (hashfunc)instance_hash, /*tp_hash*/ 0, /*tp_call*/ 0, /*tp_str*/ (getattrofunc)instance_getattr, /*tp_getattro*/ (setattrofunc)instance_setattr, /*tp_setattro*/ }; /* Instance method objects are used for two purposes: (a) as bound instance methods (returned by instancename.methodname) (b) as unbound methods (returned by ClassName.methodname) In case (b), im_self is NULL */ static PyMethodObject *free_list; PyObject * PyMethod_New(func, self, class) PyObject *func; PyObject *self; PyObject *class; { register PyMethodObject *im; if (!PyCallable_Check(func)) { PyErr_BadInternalCall(); return NULL; } im = free_list; if (im != NULL) { free_list = (PyMethodObject *)(im->im_self); im->ob_type = &PyMethod_Type; _Py_NewReference(im); } else { im = PyObject_NEW(PyMethodObject, &PyMethod_Type); if (im == NULL) return NULL; } Py_INCREF(func); im->im_func = func; Py_XINCREF(self); im->im_self = self; Py_INCREF(class); im->im_class = class; return (PyObject *)im; } PyObject * PyMethod_Function(im) register PyObject *im; { if (!PyMethod_Check(im)) { PyErr_BadInternalCall(); return NULL; } return ((PyMethodObject *)im)->im_func; } PyObject * PyMethod_Self(im) register PyObject *im; { if (!PyMethod_Check(im)) { PyErr_BadInternalCall(); return NULL; } return ((PyMethodObject *)im)->im_self; } PyObject * PyMethod_Class(im) register PyObject *im; { if (!PyMethod_Check(im)) { PyErr_BadInternalCall(); return NULL; } return ((PyMethodObject *)im)->im_class; } /* Class method methods */ #define OFF(x) offsetof(PyMethodObject, x) static struct memberlist instancemethod_memberlist[] = { {"im_func", T_OBJECT, OFF(im_func)}, {"im_self", T_OBJECT, OFF(im_self)}, {"im_class", T_OBJECT, OFF(im_class)}, /* Dummies that are not handled by getattr() except for __members__ */ {"__doc__", T_INT, 0}, {"__name__", T_INT, 0}, {NULL} /* Sentinel */ }; static PyObject * instancemethod_getattr(im, name) register PyMethodObject *im; PyObject *name; { char *sname = PyString_AsString(name); if (sname[0] == '_') { /* Inherit __name__ and __doc__ from the callable object implementing the method */ if (strcmp(sname, "__name__") == 0 || strcmp(sname, "__doc__") == 0) return PyObject_GetAttr(im->im_func, name); } if (PyEval_GetRestricted()) { PyErr_SetString(PyExc_RuntimeError, "instance-method attributes not accessible in restricted mode"); return NULL; } return PyMember_Get((char *)im, instancemethod_memberlist, sname); } static void instancemethod_dealloc(im) register PyMethodObject *im; { Py_DECREF(im->im_func); Py_XDECREF(im->im_self); Py_DECREF(im->im_class); im->im_self = (PyObject *)free_list; free_list = im; } static int instancemethod_compare(a, b) PyMethodObject *a, *b; { if (a->im_self != b->im_self) return (a->im_self < b->im_self) ? -1 : 1; return PyObject_Compare(a->im_func, b->im_func); } static PyObject * instancemethod_repr(a) PyMethodObject *a; { char buf[240]; PyInstanceObject *self = (PyInstanceObject *)(a->im_self); PyObject *func = a->im_func; PyClassObject *class = (PyClassObject *)(a->im_class); PyObject *fclassname, *iclassname, *funcname; char *fcname, *icname, *fname; fclassname = class->cl_name; if (PyFunction_Check(func)) { funcname = ((PyFunctionObject *)func)->func_name; Py_INCREF(funcname); } else { funcname = PyObject_GetAttrString(func,"__name__"); if (funcname == NULL) PyErr_Clear(); } if (funcname != NULL && PyString_Check(funcname)) fname = PyString_AS_STRING(funcname); else fname = "?"; Py_XDECREF(funcname); if (fclassname != NULL && PyString_Check(fclassname)) fcname = PyString_AsString(fclassname); else fcname = "?"; if (self == NULL) sprintf(buf, "<unbound method %.100s.%.100s>", fcname, fname); else { iclassname = self->in_class->cl_name; if (iclassname != NULL && PyString_Check(iclassname)) icname = PyString_AsString(iclassname); else icname = "?"; sprintf(buf, "<method %.60s.%.60s of %.60s instance at %lx>", fcname, fname, icname, (long)self); } return PyString_FromString(buf); } static long instancemethod_hash(a) PyMethodObject *a; { long x, y; if (a->im_self == NULL) x = PyObject_Hash(Py_None); else x = PyObject_Hash(a->im_self); if (x == -1) return -1; y = PyObject_Hash(a->im_func); if (y == -1) return -1; return x ^ y; } PyTypeObject PyMethod_Type = { PyObject_HEAD_INIT(&PyType_Type) 0, "instance method", sizeof(PyMethodObject), 0, (destructor)instancemethod_dealloc, /*tp_dealloc*/ 0, /*tp_print*/ 0, /*tp_getattr*/ 0, /*tp_setattr*/ (cmpfunc)instancemethod_compare, /*tp_compare*/ (reprfunc)instancemethod_repr, /*tp_repr*/ 0, /*tp_as_number*/ 0, /*tp_as_sequence*/ 0, /*tp_as_mapping*/ (hashfunc)instancemethod_hash, /*tp_hash*/ 0, /*tp_call*/ 0, /*tp_str*/ (getattrofunc)instancemethod_getattr, /*tp_getattro*/ 0, /*tp_setattro*/ }; /* Clear out the free list */ void PyMethod_Fini() { while (free_list) { PyMethodObject *v = free_list; free_list = (PyMethodObject *)(v->im_self); PyMem_DEL(v); } }


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