| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * Generic mapping support |
| 4 | * |
| 5 | * (c) 2019 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of Pyke: the Python Kit for Extensions. |
| 11 | * |
| 12 | * Pyke is free software: you can redistribute it and/or modify it under |
| 13 | * the terms of the GNU General Public License as published by the Free |
| 14 | * Software Foundation; either version 2 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | * |
| 17 | * Pyke is distributed in the hope that it will be useful, but WITHOUT |
| 18 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 20 | * for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with Pyke. If not, write to the Free Software Foundation, Inc., |
| 24 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 25 | */ |
| 26 | |
| 27 | /*----- Header files ------------------------------------------------------*/ |
| 28 | |
| 29 | #include "pyke.h" |
| 30 | |
| 31 | /*----- Iteration ---------------------------------------------------------*/ |
| 32 | |
| 33 | static PyTypeObject *itemiter_pytype, *valiter_pytype; |
| 34 | |
| 35 | typedef struct iter_pyobj { |
| 36 | PyObject_HEAD |
| 37 | PyObject *map; |
| 38 | PyObject *i; |
| 39 | } iter_pyobj; |
| 40 | #define ITER_MAP(o) (((iter_pyobj *)(o))->map) |
| 41 | #define ITER_I(o) (((iter_pyobj *)(o))->i) |
| 42 | |
| 43 | static void iter_pydealloc(PyObject *me) |
| 44 | { Py_DECREF(ITER_MAP(me)); Py_DECREF(ITER_I(me)); FREEOBJ(me); } |
| 45 | |
| 46 | static PyObject *itemiter_pynext(PyObject *me) |
| 47 | { |
| 48 | PyObject *k = 0, *v = 0, *rc = 0; |
| 49 | |
| 50 | if ((k = PyIter_Next(ITER_I(me))) != 0 && |
| 51 | (v = PyObject_GetItem(ITER_MAP(me), k)) != 0) |
| 52 | rc = Py_BuildValue("(OO)", k, v); |
| 53 | Py_XDECREF(k); Py_XDECREF(v); |
| 54 | return (rc); |
| 55 | } |
| 56 | |
| 57 | static PyTypeObject itemiter_pytype_skel = { |
| 58 | PyObject_HEAD_INIT(0) 0, /* Header */ |
| 59 | "ItemIter", /* @tp_name@ */ |
| 60 | sizeof(iter_pyobj), /* @tp_basicsize@ */ |
| 61 | 0, /* @tp_itemsize@ */ |
| 62 | |
| 63 | iter_pydealloc, /* @tp_dealloc@ */ |
| 64 | 0, /* @tp_print@ */ |
| 65 | 0, /* @tp_getattr@ */ |
| 66 | 0, /* @tp_setattr@ */ |
| 67 | 0, /* @tp_compare@ */ |
| 68 | 0, /* @tp_repr@ */ |
| 69 | 0, /* @tp_as_number@ */ |
| 70 | 0, /* @tp_as_sequence@ */ |
| 71 | 0, /* @tp_as_mapping@ */ |
| 72 | 0, /* @tp_hash@ */ |
| 73 | 0, /* @tp_call@ */ |
| 74 | 0, /* @tp_str@ */ |
| 75 | 0, /* @tp_getattro@ */ |
| 76 | 0, /* @tp_setattro@ */ |
| 77 | 0, /* @tp_as_buffer@ */ |
| 78 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ |
| 79 | Py_TPFLAGS_BASETYPE, |
| 80 | |
| 81 | /* @tp_doc@ */ |
| 82 | "Iterates over the items of a mapping.", |
| 83 | |
| 84 | 0, /* @tp_traverse@ */ |
| 85 | 0, /* @tp_clear@ */ |
| 86 | 0, /* @tp_richcompare@ */ |
| 87 | 0, /* @tp_weaklistoffset@ */ |
| 88 | PyObject_SelfIter, /* @tp_iter@ */ |
| 89 | itemiter_pynext, /* @tp_iternext@ */ |
| 90 | 0, /* @tp_methods@ */ |
| 91 | 0, /* @tp_members@ */ |
| 92 | 0, /* @tp_getset@ */ |
| 93 | 0, /* @tp_base@ */ |
| 94 | 0, /* @tp_dict@ */ |
| 95 | 0, /* @tp_descr_get@ */ |
| 96 | 0, /* @tp_descr_set@ */ |
| 97 | 0, /* @tp_dictoffset@ */ |
| 98 | 0, /* @tp_init@ */ |
| 99 | PyType_GenericAlloc, /* @tp_alloc@ */ |
| 100 | abstract_pynew, /* @tp_new@ */ |
| 101 | 0, /* @tp_free@ */ |
| 102 | 0 /* @tp_is_gc@ */ |
| 103 | }; |
| 104 | |
| 105 | static PyObject *valiter_pynext(PyObject *me) |
| 106 | { |
| 107 | PyObject *k = 0, *rc = 0; |
| 108 | |
| 109 | if ((k = PyIter_Next(ITER_I(me))) != 0) |
| 110 | rc = PyObject_GetItem(ITER_MAP(me), k); |
| 111 | Py_XDECREF(k); |
| 112 | return (rc); |
| 113 | } |
| 114 | |
| 115 | static PyTypeObject valiter_pytype_skel = { |
| 116 | PyObject_HEAD_INIT(0) 0, /* Header */ |
| 117 | "ValueIter", /* @tp_name@ */ |
| 118 | sizeof(iter_pyobj), /* @tp_basicsize@ */ |
| 119 | 0, /* @tp_itemsize@ */ |
| 120 | |
| 121 | iter_pydealloc, /* @tp_dealloc@ */ |
| 122 | 0, /* @tp_print@ */ |
| 123 | 0, /* @tp_getattr@ */ |
| 124 | 0, /* @tp_setattr@ */ |
| 125 | 0, /* @tp_compare@ */ |
| 126 | 0, /* @tp_repr@ */ |
| 127 | 0, /* @tp_as_number@ */ |
| 128 | 0, /* @tp_as_sequence@ */ |
| 129 | 0, /* @tp_as_mapping@ */ |
| 130 | 0, /* @tp_hash@ */ |
| 131 | 0, /* @tp_call@ */ |
| 132 | 0, /* @tp_str@ */ |
| 133 | 0, /* @tp_getattro@ */ |
| 134 | 0, /* @tp_setattro@ */ |
| 135 | 0, /* @tp_as_buffer@ */ |
| 136 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ |
| 137 | Py_TPFLAGS_BASETYPE, |
| 138 | |
| 139 | /* @tp_doc@ */ |
| 140 | "Iterates over the values of a mapping.", |
| 141 | |
| 142 | 0, /* @tp_traverse@ */ |
| 143 | 0, /* @tp_clear@ */ |
| 144 | 0, /* @tp_richcompare@ */ |
| 145 | 0, /* @tp_weaklistoffset@ */ |
| 146 | PyObject_SelfIter, /* @tp_iter@ */ |
| 147 | valiter_pynext, /* @tp_iternext@ */ |
| 148 | 0, /* @tp_methods@ */ |
| 149 | 0, /* @tp_members@ */ |
| 150 | 0, /* @tp_getset@ */ |
| 151 | 0, /* @tp_base@ */ |
| 152 | 0, /* @tp_dict@ */ |
| 153 | 0, /* @tp_descr_get@ */ |
| 154 | 0, /* @tp_descr_set@ */ |
| 155 | 0, /* @tp_dictoffset@ */ |
| 156 | 0, /* @tp_init@ */ |
| 157 | PyType_GenericAlloc, /* @tp_alloc@ */ |
| 158 | abstract_pynew, /* @tp_new@ */ |
| 159 | 0, /* @tp_free@ */ |
| 160 | 0 /* @tp_is_gc@ */ |
| 161 | }; |
| 162 | |
| 163 | const PySequenceMethods gmap_pysequence = { |
| 164 | 0, /* @sq_length@ */ |
| 165 | 0, /* @sq_concat@ */ |
| 166 | 0, /* @sq_repeat@ */ |
| 167 | 0, /* @sq_item@ */ |
| 168 | 0, /* @sq_slice@ */ |
| 169 | 0, /* @sq_ass_item@ */ |
| 170 | 0, /* @sq_ass_slice@ */ |
| 171 | PyMapping_HasKey, /* @sq_contains@ */ |
| 172 | 0, /* @sq_inplace_concat@ */ |
| 173 | 0 /* @sq_inplace_repeat@ */ |
| 174 | }; |
| 175 | |
| 176 | /*----- Other mapping protocol support ------------------------------------*/ |
| 177 | |
| 178 | Py_ssize_t gmap_pysize(PyObject *me) |
| 179 | { |
| 180 | PyObject *i = 0, *x = 0; |
| 181 | Py_ssize_t rc = -1, n = 0; |
| 182 | |
| 183 | if ((i = PyObject_GetIter(me)) == 0) goto done; |
| 184 | while ((x = PyIter_Next(i)) != 0) { n++; Py_DECREF(x); x = 0; } |
| 185 | if (PyErr_Occurred()) goto done; |
| 186 | rc = n; |
| 187 | done: |
| 188 | Py_XDECREF(i); Py_XDECREF(x); |
| 189 | return (rc); |
| 190 | } |
| 191 | |
| 192 | PyObject *gmapmeth_has_key(PyObject *me, PyObject *arg) |
| 193 | { |
| 194 | PyObject *k; |
| 195 | if (!PyArg_ParseTuple(arg, "O:has_key", &k)) return (0); |
| 196 | return (getbool(PyMapping_HasKey(me, k))); |
| 197 | } |
| 198 | |
| 199 | PyObject *gmapmeth_keys(PyObject *me) |
| 200 | { |
| 201 | PyObject *l = 0, *i = 0, *k, *rc = 0; |
| 202 | int err; |
| 203 | |
| 204 | if ((l = PyList_New(0)) == 0 || |
| 205 | (i = PyObject_GetIter(me)) == 0) |
| 206 | goto done; |
| 207 | while ((k = PyIter_Next(i)) != 0) |
| 208 | { err = PyList_Append(l, k); Py_DECREF(k); if (err) goto done; } |
| 209 | if (PyErr_Occurred()) goto done; |
| 210 | rc = l; l = 0; |
| 211 | done: |
| 212 | Py_XDECREF(l); Py_XDECREF(i); |
| 213 | return (rc); |
| 214 | } |
| 215 | |
| 216 | PyObject *gmapmeth_values(PyObject *me) |
| 217 | { |
| 218 | PyObject *l = 0, *i = 0, *k, *v, *rc = 0; |
| 219 | int err = 0; |
| 220 | |
| 221 | if ((l = PyList_New(0)) == 0 || |
| 222 | (i = PyObject_GetIter(me)) == 0) |
| 223 | goto done; |
| 224 | while ((k = PyIter_Next(i)) != 0) { |
| 225 | if ((v = PyObject_GetItem(me, k)) == 0 || |
| 226 | PyList_Append(l, v)) |
| 227 | err = -1; |
| 228 | Py_DECREF(k); Py_XDECREF(v); |
| 229 | if (err) goto done; |
| 230 | } |
| 231 | if (PyErr_Occurred()) goto done; |
| 232 | rc = l; l = 0; |
| 233 | done: |
| 234 | Py_XDECREF(l); Py_XDECREF(i); |
| 235 | return (rc); |
| 236 | } |
| 237 | |
| 238 | PyObject *gmapmeth_items(PyObject *me) |
| 239 | { |
| 240 | PyObject *l = 0, *i = 0, *k, *v, *z, *rc = 0; |
| 241 | int err = 0; |
| 242 | |
| 243 | if ((l = PyList_New(0)) == 0 || |
| 244 | (i = PyObject_GetIter(me)) == 0) |
| 245 | goto done; |
| 246 | while ((k = PyIter_Next(i)) != 0) { |
| 247 | z = 0; |
| 248 | if ((v = PyObject_GetItem(me, k)) == 0 || |
| 249 | (z = Py_BuildValue("(OO)", k, v)) == 0 || |
| 250 | PyList_Append(l, z)) |
| 251 | err = -1; |
| 252 | Py_DECREF(k); Py_XDECREF(v); Py_XDECREF(z); |
| 253 | if (err) goto done; |
| 254 | } |
| 255 | if (PyErr_Occurred()) goto done; |
| 256 | rc = l; l = 0; |
| 257 | done: |
| 258 | Py_XDECREF(l); Py_XDECREF(i); |
| 259 | return (rc); |
| 260 | } |
| 261 | |
| 262 | PyObject *gmapmeth_iterkeys(PyObject *me) |
| 263 | { return (PyObject_GetIter(me)); } |
| 264 | |
| 265 | PyObject *gmapmeth_itervalues(PyObject *me) |
| 266 | { |
| 267 | PyObject *i; |
| 268 | iter_pyobj *ii; |
| 269 | |
| 270 | if ((i = PyObject_GetIter(me)) == 0) |
| 271 | return (0); |
| 272 | ii = PyObject_NEW(iter_pyobj, valiter_pytype); |
| 273 | ii->map = me; Py_INCREF(me); |
| 274 | ii->i = i; |
| 275 | return ((PyObject *)ii); |
| 276 | } |
| 277 | |
| 278 | PyObject *gmapmeth_iteritems(PyObject *me) |
| 279 | { |
| 280 | PyObject *i; |
| 281 | iter_pyobj *ii; |
| 282 | |
| 283 | if ((i = PyObject_GetIter(me)) == 0) |
| 284 | return (0); |
| 285 | ii = PyObject_NEW(iter_pyobj, itemiter_pytype); |
| 286 | ii->map = me; Py_INCREF(me); |
| 287 | ii->i = i; |
| 288 | return ((PyObject *)ii); |
| 289 | } |
| 290 | |
| 291 | PyObject *gmapmeth_clear(PyObject *me) |
| 292 | { |
| 293 | PyObject *i = 0, *k = 0, *rc = 0; |
| 294 | |
| 295 | if ((i = PyObject_GetIter(me)) == 0) |
| 296 | goto end; |
| 297 | while ((k = PyIter_Next(i)) != 0) { |
| 298 | PyObject_DelItem(me, k); |
| 299 | Py_DECREF(k); |
| 300 | } |
| 301 | if (PyErr_Occurred()) goto end; |
| 302 | rc = me; Py_INCREF(me); |
| 303 | end: |
| 304 | Py_XDECREF(i); |
| 305 | return (rc); |
| 306 | } |
| 307 | |
| 308 | static const char *const def_kwlist[] = { "key", "default", 0 }; |
| 309 | |
| 310 | PyObject *gmapmeth_get(PyObject *me, PyObject *arg, PyObject *kw) |
| 311 | { |
| 312 | PyObject *k, *def = Py_None, *v; |
| 313 | |
| 314 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O|O:get", |
| 315 | (/*unconst*/ char **)def_kwlist, |
| 316 | &k, &def)) |
| 317 | return (0); |
| 318 | if ((v = PyObject_GetItem(me, k)) != 0) return (v); |
| 319 | PyErr_Clear(); |
| 320 | RETURN_OBJ(def); |
| 321 | } |
| 322 | |
| 323 | PyObject *gmapmeth_setdefault(PyObject *me, PyObject *arg, PyObject *kw) |
| 324 | { |
| 325 | PyObject *k, *def = Py_None, *v; |
| 326 | |
| 327 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O|O:setdefault", |
| 328 | (/*unconst*/ char **)def_kwlist, |
| 329 | &k, &def)) |
| 330 | return (0); |
| 331 | if ((v = PyObject_GetItem(me, k)) != 0) return (v); |
| 332 | PyErr_Clear(); |
| 333 | if (PyObject_SetItem(me, k, def)) return (0); |
| 334 | RETURN_OBJ(def); |
| 335 | } |
| 336 | |
| 337 | PyObject *gmapmeth_pop(PyObject *me, PyObject *arg, PyObject *kw) |
| 338 | { |
| 339 | PyObject *k, *def = 0, *v; |
| 340 | |
| 341 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "O|O:pop", |
| 342 | (/*unconst*/ char **)def_kwlist, |
| 343 | &k, &def)) |
| 344 | return (0); |
| 345 | if ((v = PyObject_GetItem(me, k)) != 0) { |
| 346 | PyObject_DelItem(me, k); |
| 347 | return (v); |
| 348 | } else if (def) { |
| 349 | PyErr_Clear(); |
| 350 | RETURN_OBJ(def); |
| 351 | } else |
| 352 | return (0); |
| 353 | } |
| 354 | |
| 355 | PyObject *gmapmeth_update(PyObject *me, PyObject *arg) |
| 356 | { |
| 357 | PyObject *map, *i = 0, *k, *v, *rc = 0; |
| 358 | int err = 0; |
| 359 | |
| 360 | if (!PyArg_ParseTuple(arg, "O:update", &map) || |
| 361 | (i = PyObject_GetIter(map)) == 0) |
| 362 | goto end; |
| 363 | while ((k = PyIter_Next(i)) != 0) { |
| 364 | if ((v = PyObject_GetItem(map, k)) == 0 || |
| 365 | PyObject_SetItem(me, k, v)) |
| 366 | err = -1; |
| 367 | Py_DECREF(k); Py_XDECREF(v); |
| 368 | if (err) goto end; |
| 369 | } |
| 370 | if (PyErr_Occurred()) goto end; |
| 371 | rc = me; Py_INCREF(me); |
| 372 | end: |
| 373 | Py_XDECREF(i); |
| 374 | return (rc); |
| 375 | } |
| 376 | |
| 377 | PyObject *gmapmeth_popitem(PyObject *me) |
| 378 | { |
| 379 | PyObject *i = 0, *k = 0, *v = 0, *rc = 0; |
| 380 | |
| 381 | if ((i = PyObject_GetIter(me)) == 0) |
| 382 | goto end; |
| 383 | if ((k = PyIter_Next(i)) == 0) { |
| 384 | if (!PyErr_Occurred()) VALERR("popitem(): mapping is empty"); |
| 385 | goto end; |
| 386 | } |
| 387 | if ((v = PyObject_GetItem(me, k)) == 0 || |
| 388 | PyObject_DelItem(me, k)) |
| 389 | goto end; |
| 390 | rc = Py_BuildValue("(OO)", k, v); |
| 391 | end: |
| 392 | Py_XDECREF(i); Py_XDECREF(k); Py_XDECREF(v); |
| 393 | return (rc); |
| 394 | } |
| 395 | |
| 396 | const PyMethodDef gmap_pymethods[] = { |
| 397 | GMAP_METHODS |
| 398 | { 0 } |
| 399 | }; |
| 400 | |
| 401 | /*----- Submodule initialization ------------------------------------------*/ |
| 402 | |
| 403 | void pyke_gmap_pyinit(void) |
| 404 | { |
| 405 | INITTYPE(itemiter, root); |
| 406 | INITTYPE(valiter, root); |
| 407 | } |
| 408 | |
| 409 | void pyke_gmap_pyinsert(PyObject *mod) |
| 410 | { |
| 411 | INSERT("ItemIter", itemiter_pytype); |
| 412 | INSERT("ValueIter", valiter_pytype); |
| 413 | } |
| 414 | |
| 415 | /*----- That's all, folks -------------------------------------------------*/ |