| 1 | /* |
|---|
| 2 | Misc backported cpy functions from python 2.5; code here is available under PSF-2.2, and GPL2 |
|---|
| 3 | Copyright (c) 2006 Python Software Foundation |
|---|
| 4 | */ |
|---|
| 5 | |
|---|
| 6 | #include "Python.h" |
|---|
| 7 | #include "structmember.h" |
|---|
| 8 | |
|---|
| 9 | #include "snakeoil/py24-compatibility.h" |
|---|
| 10 | |
|---|
| 11 | /* |
|---|
| 12 | _functools module written and maintained |
|---|
| 13 | by Hye-Shik Chang <perky@FreeBSD.org> |
|---|
| 14 | with adaptations by Raymond Hettinger <python@rcn.com> |
|---|
| 15 | Copyright (c) 2004, 2005, 2006 Python Software Foundation. |
|---|
| 16 | All rights reserved. |
|---|
| 17 | */ |
|---|
| 18 | |
|---|
| 19 | /* functool bits */ |
|---|
| 20 | |
|---|
| 21 | /* partial object **********************************************************/ |
|---|
| 22 | |
|---|
| 23 | typedef struct { |
|---|
| 24 | PyObject_HEAD |
|---|
| 25 | PyObject *fn; |
|---|
| 26 | PyObject *args; |
|---|
| 27 | PyObject *kw; |
|---|
| 28 | PyObject *dict; |
|---|
| 29 | PyObject *weakreflist; /* List of weak references */ |
|---|
| 30 | } partialobject; |
|---|
| 31 | |
|---|
| 32 | static PyTypeObject partial_type; |
|---|
| 33 | |
|---|
| 34 | static PyObject * |
|---|
| 35 | partial_new(PyTypeObject *type, PyObject *args, PyObject *kw) |
|---|
| 36 | { |
|---|
| 37 | PyObject *func; |
|---|
| 38 | partialobject *pto; |
|---|
| 39 | |
|---|
| 40 | if (PyTuple_GET_SIZE(args) < 1) { |
|---|
| 41 | PyErr_SetString(PyExc_TypeError, |
|---|
| 42 | "type 'partial' takes at least one argument"); |
|---|
| 43 | return NULL; |
|---|
| 44 | } |
|---|
| 45 | |
|---|
| 46 | func = PyTuple_GET_ITEM(args, 0); |
|---|
| 47 | if (!PyCallable_Check(func)) { |
|---|
| 48 | PyErr_SetString(PyExc_TypeError, |
|---|
| 49 | "the first argument must be callable"); |
|---|
| 50 | return NULL; |
|---|
| 51 | } |
|---|
| 52 | |
|---|
| 53 | /* create partialobject structure */ |
|---|
| 54 | pto = (partialobject *)type->tp_alloc(type, 0); |
|---|
| 55 | if (pto == NULL) |
|---|
| 56 | return NULL; |
|---|
| 57 | |
|---|
| 58 | pto->fn = func; |
|---|
| 59 | Py_INCREF(func); |
|---|
| 60 | pto->args = PyTuple_GetSlice(args, 1, PY_SSIZE_T_MAX); |
|---|
| 61 | if (pto->args == NULL) { |
|---|
| 62 | pto->kw = NULL; |
|---|
| 63 | Py_DECREF(pto); |
|---|
| 64 | return NULL; |
|---|
| 65 | } |
|---|
| 66 | if (kw != NULL) { |
|---|
| 67 | pto->kw = PyDict_Copy(kw); |
|---|
| 68 | if (pto->kw == NULL) { |
|---|
| 69 | Py_DECREF(pto); |
|---|
| 70 | return NULL; |
|---|
| 71 | } |
|---|
| 72 | } else { |
|---|
| 73 | pto->kw = Py_None; |
|---|
| 74 | Py_INCREF(Py_None); |
|---|
| 75 | } |
|---|
| 76 | |
|---|
| 77 | pto->weakreflist = NULL; |
|---|
| 78 | pto->dict = NULL; |
|---|
| 79 | |
|---|
| 80 | return (PyObject *)pto; |
|---|
| 81 | } |
|---|
| 82 | |
|---|
| 83 | static void |
|---|
| 84 | partial_dealloc(partialobject *pto) |
|---|
| 85 | { |
|---|
| 86 | PyObject_GC_UnTrack(pto); |
|---|
| 87 | if (pto->weakreflist != NULL) |
|---|
| 88 | PyObject_ClearWeakRefs((PyObject *) pto); |
|---|
| 89 | Py_XDECREF(pto->fn); |
|---|
| 90 | Py_XDECREF(pto->args); |
|---|
| 91 | Py_XDECREF(pto->kw); |
|---|
| 92 | Py_XDECREF(pto->dict); |
|---|
| 93 | pto->ob_type->tp_free(pto); |
|---|
| 94 | } |
|---|
| 95 | |
|---|
| 96 | static PyObject * |
|---|
| 97 | partial_call(partialobject *pto, PyObject *args, PyObject *kw) |
|---|
| 98 | { |
|---|
| 99 | PyObject *ret; |
|---|
| 100 | PyObject *argappl = NULL, *kwappl = NULL; |
|---|
| 101 | |
|---|
| 102 | assert (PyCallable_Check(pto->fn)); |
|---|
| 103 | assert (PyTuple_Check(pto->args)); |
|---|
| 104 | assert (pto->kw == Py_None || PyDict_Check(pto->kw)); |
|---|
| 105 | |
|---|
| 106 | if (PyTuple_GET_SIZE(pto->args) == 0) { |
|---|
| 107 | argappl = args; |
|---|
| 108 | Py_INCREF(args); |
|---|
| 109 | } else if (PyTuple_GET_SIZE(args) == 0) { |
|---|
| 110 | argappl = pto->args; |
|---|
| 111 | Py_INCREF(pto->args); |
|---|
| 112 | } else { |
|---|
| 113 | argappl = PySequence_Concat(pto->args, args); |
|---|
| 114 | if (argappl == NULL) |
|---|
| 115 | return NULL; |
|---|
| 116 | } |
|---|
| 117 | |
|---|
| 118 | if (pto->kw == Py_None) { |
|---|
| 119 | kwappl = kw; |
|---|
| 120 | Py_XINCREF(kw); |
|---|
| 121 | } else { |
|---|
| 122 | kwappl = PyDict_Copy(pto->kw); |
|---|
| 123 | if (kwappl == NULL) { |
|---|
| 124 | Py_DECREF(argappl); |
|---|
| 125 | return NULL; |
|---|
| 126 | } |
|---|
| 127 | if (kw != NULL) { |
|---|
| 128 | if (PyDict_Merge(kwappl, kw, 1) != 0) { |
|---|
| 129 | Py_DECREF(argappl); |
|---|
| 130 | Py_DECREF(kwappl); |
|---|
| 131 | return NULL; |
|---|
| 132 | } |
|---|
| 133 | } |
|---|
| 134 | } |
|---|
| 135 | |
|---|
| 136 | ret = PyObject_Call(pto->fn, argappl, kwappl); |
|---|
| 137 | Py_DECREF(argappl); |
|---|
| 138 | Py_XDECREF(kwappl); |
|---|
| 139 | return ret; |
|---|
| 140 | } |
|---|
| 141 | |
|---|
| 142 | static int |
|---|
| 143 | partial_traverse(partialobject *pto, visitproc visit, void *arg) |
|---|
| 144 | { |
|---|
| 145 | Py_VISIT(pto->fn); |
|---|
| 146 | Py_VISIT(pto->args); |
|---|
| 147 | Py_VISIT(pto->kw); |
|---|
| 148 | Py_VISIT(pto->dict); |
|---|
| 149 | return 0; |
|---|
| 150 | } |
|---|
| 151 | |
|---|
| 152 | PyDoc_STRVAR(partial_doc, |
|---|
| 153 | "partial(func, *args, **keywords) - new function with partial application\n\ |
|---|
| 154 | of the given arguments and keywords.\n"); |
|---|
| 155 | |
|---|
| 156 | #define OFF(x) offsetof(partialobject, x) |
|---|
| 157 | static PyMemberDef partial_memberlist[] = { |
|---|
| 158 | {"func", T_OBJECT, OFF(fn), READONLY, |
|---|
| 159 | "function object to use in future partial calls"}, |
|---|
| 160 | {"args", T_OBJECT, OFF(args), READONLY, |
|---|
| 161 | "tuple of arguments to future partial calls"}, |
|---|
| 162 | {"keywords", T_OBJECT, OFF(kw), READONLY, |
|---|
| 163 | "dictionary of keyword arguments to future partial calls"}, |
|---|
| 164 | {NULL} /* Sentinel */ |
|---|
| 165 | }; |
|---|
| 166 | |
|---|
| 167 | static PyObject * |
|---|
| 168 | partial_get_dict(partialobject *pto) |
|---|
| 169 | { |
|---|
| 170 | if (pto->dict == NULL) { |
|---|
| 171 | pto->dict = PyDict_New(); |
|---|
| 172 | if (pto->dict == NULL) |
|---|
| 173 | return NULL; |
|---|
| 174 | } |
|---|
| 175 | Py_INCREF(pto->dict); |
|---|
| 176 | return pto->dict; |
|---|
| 177 | } |
|---|
| 178 | |
|---|
| 179 | static int |
|---|
| 180 | partial_set_dict(partialobject *pto, PyObject *value) |
|---|
| 181 | { |
|---|
| 182 | PyObject *tmp; |
|---|
| 183 | |
|---|
| 184 | /* It is illegal to del p.__dict__ */ |
|---|
| 185 | if (value == NULL) { |
|---|
| 186 | PyErr_SetString(PyExc_TypeError, |
|---|
| 187 | "a partial object's dictionary may not be deleted"); |
|---|
| 188 | return -1; |
|---|
| 189 | } |
|---|
| 190 | /* Can only set __dict__ to a dictionary */ |
|---|
| 191 | if (!PyDict_Check(value)) { |
|---|
| 192 | PyErr_SetString(PyExc_TypeError, |
|---|
| 193 | "setting partial object's dictionary to a non-dict"); |
|---|
| 194 | return -1; |
|---|
| 195 | } |
|---|
| 196 | tmp = pto->dict; |
|---|
| 197 | Py_INCREF(value); |
|---|
| 198 | pto->dict = value; |
|---|
| 199 | Py_XDECREF(tmp); |
|---|
| 200 | return 0; |
|---|
| 201 | } |
|---|
| 202 | |
|---|
| 203 | static PyGetSetDef partial_getsetlist[] = { |
|---|
| 204 | {"__dict__", (getter)partial_get_dict, (setter)partial_set_dict}, |
|---|
| 205 | {NULL} /* Sentinel */ |
|---|
| 206 | }; |
|---|
| 207 | |
|---|
| 208 | static PyTypeObject partial_type = { |
|---|
| 209 | PyObject_HEAD_INIT(NULL) |
|---|
| 210 | 0, /* ob_size */ |
|---|
| 211 | "functools.partial", /* tp_name */ |
|---|
| 212 | sizeof(partialobject), /* tp_basicsize */ |
|---|
| 213 | 0, /* tp_itemsize */ |
|---|
| 214 | /* methods */ |
|---|
| 215 | (destructor)partial_dealloc, /* tp_dealloc */ |
|---|
| 216 | 0, /* tp_print */ |
|---|
| 217 | 0, /* tp_getattr */ |
|---|
| 218 | 0, /* tp_setattr */ |
|---|
| 219 | 0, /* tp_compare */ |
|---|
| 220 | 0, /* tp_repr */ |
|---|
| 221 | 0, /* tp_as_number */ |
|---|
| 222 | 0, /* tp_as_sequence */ |
|---|
| 223 | 0, /* tp_as_mapping */ |
|---|
| 224 | 0, /* tp_hash */ |
|---|
| 225 | (ternaryfunc)partial_call, /* tp_call */ |
|---|
| 226 | 0, /* tp_str */ |
|---|
| 227 | PyObject_GenericGetAttr, /* tp_getattro */ |
|---|
| 228 | PyObject_GenericSetAttr, /* tp_setattro */ |
|---|
| 229 | 0, /* tp_as_buffer */ |
|---|
| 230 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
|---|
| 231 | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_WEAKREFS, /* tp_flags */ |
|---|
| 232 | partial_doc, /* tp_doc */ |
|---|
| 233 | (traverseproc)partial_traverse, /* tp_traverse */ |
|---|
| 234 | 0, /* tp_clear */ |
|---|
| 235 | 0, /* tp_richcompare */ |
|---|
| 236 | offsetof(partialobject, weakreflist), /* tp_weaklistoffset */ |
|---|
| 237 | 0, /* tp_iter */ |
|---|
| 238 | 0, /* tp_iternext */ |
|---|
| 239 | 0, /* tp_methods */ |
|---|
| 240 | partial_memberlist, /* tp_members */ |
|---|
| 241 | partial_getsetlist, /* tp_getset */ |
|---|
| 242 | 0, /* tp_base */ |
|---|
| 243 | 0, /* tp_dict */ |
|---|
| 244 | 0, /* tp_descr_get */ |
|---|
| 245 | 0, /* tp_descr_set */ |
|---|
| 246 | offsetof(partialobject, dict), /* tp_dictoffset */ |
|---|
| 247 | 0, /* tp_init */ |
|---|
| 248 | 0, /* tp_alloc */ |
|---|
| 249 | partial_new, /* tp_new */ |
|---|
| 250 | PyObject_GC_Del, /* tp_free */ |
|---|
| 251 | }; |
|---|
| 252 | |
|---|
| 253 | /* any/all (from bltinmodules) bits */ |
|---|
| 254 | |
|---|
| 255 | static PyObject * |
|---|
| 256 | builtin_all(PyObject *self, PyObject *v) |
|---|
| 257 | { |
|---|
| 258 | PyObject *it, *item; |
|---|
| 259 | |
|---|
| 260 | it = PyObject_GetIter(v); |
|---|
| 261 | if (it == NULL) |
|---|
| 262 | return NULL; |
|---|
| 263 | |
|---|
| 264 | while ((item = PyIter_Next(it)) != NULL) { |
|---|
| 265 | int cmp = PyObject_IsTrue(item); |
|---|
| 266 | Py_DECREF(item); |
|---|
| 267 | if (cmp < 0) { |
|---|
| 268 | Py_DECREF(it); |
|---|
| 269 | return NULL; |
|---|
| 270 | } |
|---|
| 271 | if (cmp == 0) { |
|---|
| 272 | Py_DECREF(it); |
|---|
| 273 | Py_RETURN_FALSE; |
|---|
| 274 | } |
|---|
| 275 | } |
|---|
| 276 | Py_DECREF(it); |
|---|
| 277 | if (PyErr_Occurred()) |
|---|
| 278 | return NULL; |
|---|
| 279 | Py_RETURN_TRUE; |
|---|
| 280 | } |
|---|
| 281 | |
|---|
| 282 | PyDoc_STRVAR(all_doc, |
|---|
| 283 | "all(iterable) -> bool\n\ |
|---|
| 284 | \n\ |
|---|
| 285 | Return True if bool(x) is True for all values x in the iterable."); |
|---|
| 286 | |
|---|
| 287 | static PyObject * |
|---|
| 288 | builtin_any(PyObject *self, PyObject *v) |
|---|
| 289 | { |
|---|
| 290 | PyObject *it, *item; |
|---|
| 291 | |
|---|
| 292 | it = PyObject_GetIter(v); |
|---|
| 293 | if (it == NULL) |
|---|
| 294 | return NULL; |
|---|
| 295 | |
|---|
| 296 | while ((item = PyIter_Next(it)) != NULL) { |
|---|
| 297 | int cmp = PyObject_IsTrue(item); |
|---|
| 298 | Py_DECREF(item); |
|---|
| 299 | if (cmp < 0) { |
|---|
| 300 | Py_DECREF(it); |
|---|
| 301 | return NULL; |
|---|
| 302 | } |
|---|
| 303 | if (cmp == 1) { |
|---|
| 304 | Py_DECREF(it); |
|---|
| 305 | Py_RETURN_TRUE; |
|---|
| 306 | } |
|---|
| 307 | } |
|---|
| 308 | Py_DECREF(it); |
|---|
| 309 | if (PyErr_Occurred()) |
|---|
| 310 | return NULL; |
|---|
| 311 | Py_RETURN_FALSE; |
|---|
| 312 | } |
|---|
| 313 | |
|---|
| 314 | PyDoc_STRVAR(any_doc, |
|---|
| 315 | "any(iterable) -> bool\n\ |
|---|
| 316 | \n\ |
|---|
| 317 | Return True if bool(x) is True for any x in the iterable."); |
|---|
| 318 | |
|---|
| 319 | |
|---|
| 320 | /* module level code ********************************************************/ |
|---|
| 321 | |
|---|
| 322 | PyDoc_STRVAR(module_doc, |
|---|
| 323 | "extracted cpy bits from python2.5s functools and builtins; any/all, " |
|---|
| 324 | "and partial.\nCopyright PSF 2006"); |
|---|
| 325 | |
|---|
| 326 | static PyMethodDef module_methods[] = { |
|---|
| 327 | {"all", builtin_all, METH_O, all_doc}, |
|---|
| 328 | {"any", builtin_any, METH_O, any_doc}, |
|---|
| 329 | {NULL, NULL} /* sentinel */ |
|---|
| 330 | }; |
|---|
| 331 | |
|---|
| 332 | |
|---|
| 333 | PyMODINIT_FUNC |
|---|
| 334 | init_compatibility(void) |
|---|
| 335 | { |
|---|
| 336 | int i; |
|---|
| 337 | PyObject *m; |
|---|
| 338 | char *name; |
|---|
| 339 | PyTypeObject *typelist[] = { |
|---|
| 340 | &partial_type, |
|---|
| 341 | NULL |
|---|
| 342 | }; |
|---|
| 343 | |
|---|
| 344 | m = Py_InitModule3("_compatibility", module_methods, module_doc); |
|---|
| 345 | if (m == NULL) |
|---|
| 346 | return; |
|---|
| 347 | |
|---|
| 348 | for (i=0 ; typelist[i] != NULL ; i++) { |
|---|
| 349 | if (PyType_Ready(typelist[i]) < 0) |
|---|
| 350 | return; |
|---|
| 351 | name = strchr(typelist[i]->tp_name, '.'); |
|---|
| 352 | assert (name != NULL); |
|---|
| 353 | Py_INCREF(typelist[i]); |
|---|
| 354 | PyModule_AddObject(m, name+1, (PyObject *)typelist[i]); |
|---|
| 355 | } |
|---|
| 356 | } |
|---|