Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1 | |
| 2 | #include "Python.h" |
| 3 | |
| 4 | /* Itertools module written and maintained |
| 5 | by Raymond D. Hettinger <python@rcn.com> |
| 6 | Copyright (c) 2003 Python Software Foundation. |
| 7 | All rights reserved. |
| 8 | */ |
| 9 | |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 10 | |
| 11 | /* groupby object ***********************************************************/ |
| 12 | |
| 13 | typedef struct { |
| 14 | PyObject_HEAD |
| 15 | PyObject *it; |
| 16 | PyObject *keyfunc; |
| 17 | PyObject *tgtkey; |
| 18 | PyObject *currkey; |
| 19 | PyObject *currvalue; |
| 20 | } groupbyobject; |
| 21 | |
| 22 | static PyTypeObject groupby_type; |
| 23 | static PyObject *_grouper_create(groupbyobject *, PyObject *); |
| 24 | |
| 25 | static PyObject * |
| 26 | groupby_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 27 | { |
| 28 | static char *kwargs[] = {"iterable", "key", NULL}; |
| 29 | groupbyobject *gbo; |
| 30 | PyObject *it, *keyfunc = Py_None; |
| 31 | |
| 32 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O:groupby", kwargs, |
| 33 | &it, &keyfunc)) |
| 34 | return NULL; |
| 35 | |
| 36 | gbo = (groupbyobject *)type->tp_alloc(type, 0); |
| 37 | if (gbo == NULL) |
| 38 | return NULL; |
| 39 | gbo->tgtkey = NULL; |
| 40 | gbo->currkey = NULL; |
| 41 | gbo->currvalue = NULL; |
| 42 | gbo->keyfunc = keyfunc; |
| 43 | Py_INCREF(keyfunc); |
| 44 | gbo->it = PyObject_GetIter(it); |
| 45 | if (gbo->it == NULL) { |
| 46 | Py_DECREF(gbo); |
| 47 | return NULL; |
| 48 | } |
| 49 | return (PyObject *)gbo; |
| 50 | } |
| 51 | |
| 52 | static void |
| 53 | groupby_dealloc(groupbyobject *gbo) |
| 54 | { |
| 55 | PyObject_GC_UnTrack(gbo); |
| 56 | Py_XDECREF(gbo->it); |
| 57 | Py_XDECREF(gbo->keyfunc); |
| 58 | Py_XDECREF(gbo->tgtkey); |
| 59 | Py_XDECREF(gbo->currkey); |
| 60 | Py_XDECREF(gbo->currvalue); |
| 61 | gbo->ob_type->tp_free(gbo); |
| 62 | } |
| 63 | |
| 64 | static int |
| 65 | groupby_traverse(groupbyobject *gbo, visitproc visit, void *arg) |
| 66 | { |
| 67 | int err; |
| 68 | |
| 69 | if (gbo->it) { |
| 70 | err = visit(gbo->it, arg); |
| 71 | if (err) |
| 72 | return err; |
| 73 | } |
| 74 | if (gbo->keyfunc) { |
| 75 | err = visit(gbo->keyfunc, arg); |
| 76 | if (err) |
| 77 | return err; |
| 78 | } |
| 79 | if (gbo->tgtkey) { |
| 80 | err = visit(gbo->tgtkey, arg); |
| 81 | if (err) |
| 82 | return err; |
| 83 | } |
| 84 | if (gbo->currkey) { |
| 85 | err = visit(gbo->currkey, arg); |
| 86 | if (err) |
| 87 | return err; |
| 88 | } |
| 89 | if (gbo->currvalue) { |
| 90 | err = visit(gbo->currvalue, arg); |
| 91 | if (err) |
| 92 | return err; |
| 93 | } |
| 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | static PyObject * |
| 98 | groupby_next(groupbyobject *gbo) |
| 99 | { |
| 100 | PyObject *newvalue, *newkey, *r, *grouper; |
| 101 | |
| 102 | /* skip to next iteration group */ |
| 103 | for (;;) { |
| 104 | if (gbo->currkey == NULL) |
| 105 | /* pass */; |
| 106 | else if (gbo->tgtkey == NULL) |
| 107 | break; |
| 108 | else { |
| 109 | int rcmp; |
| 110 | |
| 111 | rcmp = PyObject_RichCompareBool(gbo->tgtkey, |
| 112 | gbo->currkey, Py_EQ); |
| 113 | if (rcmp == -1) |
| 114 | return NULL; |
| 115 | else if (rcmp == 0) |
| 116 | break; |
| 117 | } |
| 118 | |
| 119 | newvalue = PyIter_Next(gbo->it); |
| 120 | if (newvalue == NULL) |
| 121 | return NULL; |
| 122 | |
| 123 | if (gbo->keyfunc == Py_None) { |
| 124 | newkey = newvalue; |
| 125 | Py_INCREF(newvalue); |
| 126 | } else { |
| 127 | newkey = PyObject_CallFunctionObjArgs(gbo->keyfunc, |
| 128 | newvalue, NULL); |
| 129 | if (newkey == NULL) { |
| 130 | Py_DECREF(newvalue); |
| 131 | return NULL; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | Py_XDECREF(gbo->currkey); |
| 136 | gbo->currkey = newkey; |
| 137 | Py_XDECREF(gbo->currvalue); |
| 138 | gbo->currvalue = newvalue; |
| 139 | } |
| 140 | |
| 141 | Py_XDECREF(gbo->tgtkey); |
| 142 | gbo->tgtkey = gbo->currkey; |
| 143 | Py_INCREF(gbo->currkey); |
| 144 | |
| 145 | grouper = _grouper_create(gbo, gbo->tgtkey); |
| 146 | if (grouper == NULL) |
| 147 | return NULL; |
| 148 | |
| 149 | r = PyTuple_Pack(2, gbo->currkey, grouper); |
| 150 | Py_DECREF(grouper); |
| 151 | return r; |
| 152 | } |
| 153 | |
| 154 | PyDoc_STRVAR(groupby_doc, |
| 155 | "groupby(iterable[, keyfunc]) -> create an iterator which returns\n\ |
| 156 | (key, sub-iterator) grouped by each value of key(value).\n"); |
| 157 | |
| 158 | static PyTypeObject groupby_type = { |
| 159 | PyObject_HEAD_INIT(NULL) |
| 160 | 0, /* ob_size */ |
| 161 | "itertools.groupby", /* tp_name */ |
| 162 | sizeof(groupbyobject), /* tp_basicsize */ |
| 163 | 0, /* tp_itemsize */ |
| 164 | /* methods */ |
| 165 | (destructor)groupby_dealloc, /* tp_dealloc */ |
| 166 | 0, /* tp_print */ |
| 167 | 0, /* tp_getattr */ |
| 168 | 0, /* tp_setattr */ |
| 169 | 0, /* tp_compare */ |
| 170 | 0, /* tp_repr */ |
| 171 | 0, /* tp_as_number */ |
| 172 | 0, /* tp_as_sequence */ |
| 173 | 0, /* tp_as_mapping */ |
| 174 | 0, /* tp_hash */ |
| 175 | 0, /* tp_call */ |
| 176 | 0, /* tp_str */ |
| 177 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 178 | 0, /* tp_setattro */ |
| 179 | 0, /* tp_as_buffer */ |
| 180 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 181 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| 182 | groupby_doc, /* tp_doc */ |
| 183 | (traverseproc)groupby_traverse, /* tp_traverse */ |
| 184 | 0, /* tp_clear */ |
| 185 | 0, /* tp_richcompare */ |
| 186 | 0, /* tp_weaklistoffset */ |
| 187 | PyObject_SelfIter, /* tp_iter */ |
| 188 | (iternextfunc)groupby_next, /* tp_iternext */ |
| 189 | 0, /* tp_methods */ |
| 190 | 0, /* tp_members */ |
| 191 | 0, /* tp_getset */ |
| 192 | 0, /* tp_base */ |
| 193 | 0, /* tp_dict */ |
| 194 | 0, /* tp_descr_get */ |
| 195 | 0, /* tp_descr_set */ |
| 196 | 0, /* tp_dictoffset */ |
| 197 | 0, /* tp_init */ |
| 198 | 0, /* tp_alloc */ |
| 199 | groupby_new, /* tp_new */ |
| 200 | PyObject_GC_Del, /* tp_free */ |
| 201 | }; |
| 202 | |
| 203 | |
| 204 | /* _grouper object (internal) ************************************************/ |
| 205 | |
| 206 | typedef struct { |
| 207 | PyObject_HEAD |
| 208 | PyObject *parent; |
| 209 | PyObject *tgtkey; |
| 210 | } _grouperobject; |
| 211 | |
| 212 | static PyTypeObject _grouper_type; |
| 213 | |
| 214 | static PyObject * |
| 215 | _grouper_create(groupbyobject *parent, PyObject *tgtkey) |
| 216 | { |
| 217 | _grouperobject *igo; |
| 218 | |
| 219 | igo = PyObject_New(_grouperobject, &_grouper_type); |
| 220 | if (igo == NULL) |
| 221 | return NULL; |
| 222 | igo->parent = (PyObject *)parent; |
| 223 | Py_INCREF(parent); |
| 224 | igo->tgtkey = tgtkey; |
| 225 | Py_INCREF(tgtkey); |
| 226 | |
| 227 | return (PyObject *)igo; |
| 228 | } |
| 229 | |
| 230 | static void |
| 231 | _grouper_dealloc(_grouperobject *igo) |
| 232 | { |
| 233 | Py_DECREF(igo->parent); |
| 234 | Py_DECREF(igo->tgtkey); |
| 235 | PyObject_Del(igo); |
| 236 | } |
| 237 | |
| 238 | static PyObject * |
| 239 | _grouper_next(_grouperobject *igo) |
| 240 | { |
| 241 | groupbyobject *gbo = (groupbyobject *)igo->parent; |
| 242 | PyObject *newvalue, *newkey, *r; |
| 243 | int rcmp; |
| 244 | |
| 245 | if (gbo->currvalue == NULL) { |
| 246 | newvalue = PyIter_Next(gbo->it); |
| 247 | if (newvalue == NULL) |
| 248 | return NULL; |
| 249 | |
| 250 | if (gbo->keyfunc == Py_None) { |
| 251 | newkey = newvalue; |
| 252 | Py_INCREF(newvalue); |
| 253 | } else { |
| 254 | newkey = PyObject_CallFunctionObjArgs(gbo->keyfunc, |
| 255 | newvalue, NULL); |
| 256 | if (newkey == NULL) { |
| 257 | Py_DECREF(newvalue); |
| 258 | return NULL; |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | assert(gbo->currkey == NULL); |
| 263 | gbo->currkey = newkey; |
| 264 | gbo->currvalue = newvalue; |
| 265 | } |
| 266 | |
| 267 | assert(gbo->currkey != NULL); |
| 268 | rcmp = PyObject_RichCompareBool(igo->tgtkey, gbo->currkey, Py_EQ); |
| 269 | if (rcmp <= 0) |
| 270 | /* got any error or current group is end */ |
| 271 | return NULL; |
| 272 | |
| 273 | r = gbo->currvalue; |
| 274 | gbo->currvalue = NULL; |
| 275 | Py_DECREF(gbo->currkey); |
| 276 | gbo->currkey = NULL; |
| 277 | |
| 278 | return r; |
| 279 | } |
| 280 | |
| 281 | static PyTypeObject _grouper_type = { |
| 282 | PyObject_HEAD_INIT(NULL) |
| 283 | 0, /* ob_size */ |
| 284 | "itertools._grouper", /* tp_name */ |
| 285 | sizeof(_grouperobject), /* tp_basicsize */ |
| 286 | 0, /* tp_itemsize */ |
| 287 | /* methods */ |
| 288 | (destructor)_grouper_dealloc, /* tp_dealloc */ |
| 289 | 0, /* tp_print */ |
| 290 | 0, /* tp_getattr */ |
| 291 | 0, /* tp_setattr */ |
| 292 | 0, /* tp_compare */ |
| 293 | 0, /* tp_repr */ |
| 294 | 0, /* tp_as_number */ |
| 295 | 0, /* tp_as_sequence */ |
| 296 | 0, /* tp_as_mapping */ |
| 297 | 0, /* tp_hash */ |
| 298 | 0, /* tp_call */ |
| 299 | 0, /* tp_str */ |
| 300 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 301 | 0, /* tp_setattro */ |
| 302 | 0, /* tp_as_buffer */ |
| 303 | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
| 304 | 0, /* tp_doc */ |
| 305 | 0, /* tp_traverse */ |
| 306 | 0, /* tp_clear */ |
| 307 | 0, /* tp_richcompare */ |
| 308 | 0, /* tp_weaklistoffset */ |
| 309 | PyObject_SelfIter, /* tp_iter */ |
| 310 | (iternextfunc)_grouper_next, /* tp_iternext */ |
| 311 | 0, /* tp_methods */ |
| 312 | 0, /* tp_members */ |
| 313 | 0, /* tp_getset */ |
| 314 | 0, /* tp_base */ |
| 315 | 0, /* tp_dict */ |
| 316 | 0, /* tp_descr_get */ |
| 317 | 0, /* tp_descr_set */ |
| 318 | 0, /* tp_dictoffset */ |
| 319 | 0, /* tp_init */ |
| 320 | 0, /* tp_alloc */ |
| 321 | 0, /* tp_new */ |
| 322 | PyObject_Del, /* tp_free */ |
| 323 | }; |
| 324 | |
| 325 | |
| 326 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 327 | /* tee object and with supporting function and objects ***************/ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 328 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 329 | /* The teedataobject pre-allocates space for LINKCELLS number of objects. |
| 330 | To help the object fit neatly inside cache lines (space for 16 to 32 |
| 331 | pointers), the value should be a multiple of 16 minus space for |
| 332 | the other structure members including PyHEAD overhead. The larger the |
| 333 | value, the less memory overhead per object and the less time spent |
| 334 | allocating/deallocating new links. The smaller the number, the less |
| 335 | wasted space and the more rapid freeing of older data. |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 336 | */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 337 | #define LINKCELLS 57 |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 338 | |
| 339 | typedef struct { |
| 340 | PyObject_HEAD |
| 341 | PyObject *it; |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 342 | int numread; |
| 343 | PyObject *nextlink; |
| 344 | PyObject *(values[LINKCELLS]); |
| 345 | } teedataobject; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 346 | |
| 347 | typedef struct { |
| 348 | PyObject_HEAD |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 349 | teedataobject *dataobj; |
| 350 | int index; |
| 351 | } teeobject; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 352 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 353 | static PyTypeObject teedataobject_type; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 354 | |
| 355 | static PyObject * |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 356 | teedataobject_new(PyObject *it) |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 357 | { |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 358 | teedataobject *tdo; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 359 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 360 | tdo = PyObject_New(teedataobject, &teedataobject_type); |
| 361 | if (tdo == NULL) |
Raymond Hettinger | 4514369 | 2003-10-25 06:37:47 +0000 | [diff] [blame] | 362 | return NULL; |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 363 | |
| 364 | tdo->numread = 0; |
| 365 | tdo->nextlink = NULL; |
| 366 | Py_INCREF(it); |
| 367 | tdo->it = it; |
| 368 | return (PyObject *)tdo; |
| 369 | } |
| 370 | |
| 371 | static PyObject * |
| 372 | teedataobject_jumplink(teedataobject *tdo) |
| 373 | { |
| 374 | if (tdo->nextlink == NULL) |
| 375 | tdo->nextlink = teedataobject_new(tdo->it); |
| 376 | Py_INCREF(tdo->nextlink); |
| 377 | return tdo->nextlink; |
| 378 | } |
| 379 | |
| 380 | static PyObject * |
| 381 | teedataobject_getitem(teedataobject *tdo, int i) |
| 382 | { |
| 383 | PyObject *value; |
| 384 | |
| 385 | assert(i < LINKCELLS); |
| 386 | if (i < tdo->numread) |
| 387 | value = tdo->values[i]; |
| 388 | else { |
| 389 | /* this is the lead iterator, so fetch more data */ |
| 390 | assert(i == tdo->numread); |
| 391 | value = PyIter_Next(tdo->it); |
| 392 | if (value == NULL) |
| 393 | return NULL; |
| 394 | tdo->numread++; |
| 395 | tdo->values[i] = value; |
Raymond Hettinger | 4514369 | 2003-10-25 06:37:47 +0000 | [diff] [blame] | 396 | } |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 397 | Py_INCREF(value); |
| 398 | return value; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 399 | } |
| 400 | |
| 401 | static void |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 402 | teedataobject_dealloc(teedataobject *tdo) |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 403 | { |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 404 | int i; |
Raymond Hettinger | 4514369 | 2003-10-25 06:37:47 +0000 | [diff] [blame] | 405 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 406 | for (i=0 ; i<tdo->numread ; i++) |
| 407 | Py_DECREF(tdo->values[i]); |
| 408 | Py_XDECREF(tdo->it); |
| 409 | Py_XDECREF(tdo->nextlink); |
| 410 | PyObject_Del(tdo); |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 411 | } |
| 412 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 413 | PyDoc_STRVAR(teedataobject_doc, "Data container common to multiple tee objects."); |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 414 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 415 | static PyTypeObject teedataobject_type = { |
Skip Montanaro | f3938fd | 2004-02-10 20:27:40 +0000 | [diff] [blame] | 416 | PyObject_HEAD_INIT(0) /* Must fill in type value later */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 417 | 0, /* ob_size */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 418 | "itertools.tee_dataobject", /* tp_name */ |
| 419 | sizeof(teedataobject), /* tp_basicsize */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 420 | 0, /* tp_itemsize */ |
| 421 | /* methods */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 422 | (destructor)teedataobject_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 423 | 0, /* tp_print */ |
| 424 | 0, /* tp_getattr */ |
| 425 | 0, /* tp_setattr */ |
| 426 | 0, /* tp_compare */ |
| 427 | 0, /* tp_repr */ |
| 428 | 0, /* tp_as_number */ |
| 429 | 0, /* tp_as_sequence */ |
| 430 | 0, /* tp_as_mapping */ |
| 431 | 0, /* tp_hash */ |
| 432 | 0, /* tp_call */ |
| 433 | 0, /* tp_str */ |
| 434 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 435 | 0, /* tp_setattro */ |
| 436 | 0, /* tp_as_buffer */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 437 | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
| 438 | teedataobject_doc, /* tp_doc */ |
| 439 | 0, /* tp_traverse */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 440 | }; |
| 441 | |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 442 | |
| 443 | static PyTypeObject tee_type; |
| 444 | |
| 445 | static PyObject * |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 446 | tee_next(teeobject *to) |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 447 | { |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 448 | PyObject *value, *link; |
| 449 | |
| 450 | if (to->index >= LINKCELLS) { |
| 451 | link = teedataobject_jumplink(to->dataobj); |
| 452 | Py_XDECREF(to->dataobj); |
| 453 | to->dataobj = (teedataobject *)link; |
| 454 | to->index = 0; |
| 455 | } |
| 456 | value = teedataobject_getitem(to->dataobj, to->index); |
| 457 | if (value == NULL) |
| 458 | return NULL; |
| 459 | to->index++; |
| 460 | return value; |
| 461 | } |
| 462 | |
| 463 | static PyObject * |
| 464 | tee_copy(teeobject *to) |
| 465 | { |
| 466 | teeobject *newto; |
| 467 | |
| 468 | newto = PyObject_New(teeobject, &tee_type); |
| 469 | if (newto == NULL) |
| 470 | return NULL; |
| 471 | Py_INCREF(to->dataobj); |
| 472 | newto->dataobj = to->dataobj; |
| 473 | newto->index = to->index; |
| 474 | return (PyObject *)newto; |
| 475 | } |
| 476 | |
| 477 | PyDoc_STRVAR(teecopy_doc, "Returns an independent iterator."); |
| 478 | |
| 479 | static PyObject * |
| 480 | tee_fromiterable(PyObject *iterable) |
| 481 | { |
| 482 | teeobject *to; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 483 | PyObject *it = NULL; |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 484 | |
| 485 | it = PyObject_GetIter(iterable); |
| 486 | if (it == NULL) |
| 487 | return NULL; |
| 488 | if (PyObject_TypeCheck(it, &tee_type)) { |
| 489 | to = (teeobject *)tee_copy((teeobject *)it); |
| 490 | goto done; |
| 491 | } |
| 492 | |
| 493 | to = PyObject_New(teeobject, &tee_type); |
| 494 | if (to == NULL) |
| 495 | goto done; |
| 496 | to->dataobj = (teedataobject *)teedataobject_new(it); |
| 497 | to->index = 0; |
| 498 | done: |
| 499 | Py_XDECREF(it); |
| 500 | return (PyObject *)to; |
| 501 | } |
| 502 | |
| 503 | static PyObject * |
| 504 | tee_new(PyTypeObject *type, PyObject *args, PyObject *kw) |
| 505 | { |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 506 | PyObject *iterable; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 507 | |
| 508 | if (!PyArg_UnpackTuple(args, "tee", 1, 1, &iterable)) |
| 509 | return NULL; |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 510 | return tee_fromiterable(iterable); |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 511 | } |
| 512 | |
| 513 | static void |
| 514 | tee_dealloc(teeobject *to) |
| 515 | { |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 516 | Py_XDECREF(to->dataobj); |
| 517 | PyObject_Del(to); |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 518 | } |
| 519 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 520 | PyDoc_STRVAR(teeobject_doc, |
| 521 | "Iterator wrapped to make it copyable"); |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 522 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 523 | static PyMethodDef tee_methods[] = { |
| 524 | {"__copy__", (PyCFunction)tee_copy, METH_NOARGS, teecopy_doc}, |
| 525 | {NULL, NULL} /* sentinel */ |
| 526 | }; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 527 | |
| 528 | static PyTypeObject tee_type = { |
| 529 | PyObject_HEAD_INIT(NULL) |
| 530 | 0, /* ob_size */ |
| 531 | "itertools.tee", /* tp_name */ |
| 532 | sizeof(teeobject), /* tp_basicsize */ |
| 533 | 0, /* tp_itemsize */ |
| 534 | /* methods */ |
| 535 | (destructor)tee_dealloc, /* tp_dealloc */ |
| 536 | 0, /* tp_print */ |
| 537 | 0, /* tp_getattr */ |
| 538 | 0, /* tp_setattr */ |
| 539 | 0, /* tp_compare */ |
| 540 | 0, /* tp_repr */ |
| 541 | 0, /* tp_as_number */ |
| 542 | 0, /* tp_as_sequence */ |
| 543 | 0, /* tp_as_mapping */ |
| 544 | 0, /* tp_hash */ |
| 545 | 0, /* tp_call */ |
| 546 | 0, /* tp_str */ |
Raymond Hettinger | f0c5aec | 2003-10-26 14:25:56 +0000 | [diff] [blame] | 547 | 0, /* tp_getattro */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 548 | 0, /* tp_setattro */ |
| 549 | 0, /* tp_as_buffer */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 550 | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
| 551 | teeobject_doc, /* tp_doc */ |
| 552 | 0, /* tp_traverse */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 553 | 0, /* tp_clear */ |
| 554 | 0, /* tp_richcompare */ |
| 555 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 556 | PyObject_SelfIter, /* tp_iter */ |
| 557 | (iternextfunc)tee_next, /* tp_iternext */ |
| 558 | tee_methods, /* tp_methods */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 559 | 0, /* tp_members */ |
| 560 | 0, /* tp_getset */ |
| 561 | 0, /* tp_base */ |
| 562 | 0, /* tp_dict */ |
| 563 | 0, /* tp_descr_get */ |
| 564 | 0, /* tp_descr_set */ |
| 565 | 0, /* tp_dictoffset */ |
| 566 | 0, /* tp_init */ |
| 567 | 0, /* tp_alloc */ |
| 568 | tee_new, /* tp_new */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 569 | PyObject_Del, /* tp_free */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 570 | }; |
| 571 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 572 | static PyObject * |
| 573 | tee(PyObject *self, PyObject *args) |
| 574 | { |
| 575 | int i, n=2; |
| 576 | PyObject *it, *iterable, *copyable, *result; |
| 577 | |
| 578 | if (!PyArg_ParseTuple(args, "O|i", &iterable, &n)) |
| 579 | return NULL; |
| 580 | result = PyTuple_New(n); |
| 581 | if (result == NULL) |
| 582 | return NULL; |
| 583 | if (n == 0) |
| 584 | return result; |
| 585 | it = PyObject_GetIter(iterable); |
| 586 | if (it == NULL) { |
| 587 | Py_DECREF(result); |
| 588 | return NULL; |
| 589 | } |
| 590 | if (!PyObject_HasAttrString(it, "__copy__")) { |
| 591 | copyable = tee_fromiterable(it); |
| 592 | Py_DECREF(it); |
| 593 | if (copyable == NULL) { |
| 594 | Py_DECREF(result); |
| 595 | return NULL; |
| 596 | } |
| 597 | } else |
| 598 | copyable = it; |
| 599 | PyTuple_SET_ITEM(result, 0, copyable); |
| 600 | for (i=1 ; i<n ; i++) { |
| 601 | copyable = PyObject_CallMethod(copyable, "__copy__", NULL); |
| 602 | if (copyable == NULL) { |
| 603 | Py_DECREF(result); |
| 604 | return NULL; |
| 605 | } |
| 606 | PyTuple_SET_ITEM(result, i, copyable); |
| 607 | } |
| 608 | return result; |
| 609 | } |
| 610 | |
| 611 | PyDoc_STRVAR(tee_doc, |
| 612 | "tee(iterable, n=2) --> tuple of n independent iterators."); |
| 613 | |
| 614 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 615 | /* cycle object **********************************************************/ |
| 616 | |
| 617 | typedef struct { |
| 618 | PyObject_HEAD |
| 619 | PyObject *it; |
| 620 | PyObject *saved; |
| 621 | int firstpass; |
| 622 | } cycleobject; |
| 623 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 624 | static PyTypeObject cycle_type; |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 625 | |
| 626 | static PyObject * |
| 627 | cycle_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 628 | { |
| 629 | PyObject *it; |
| 630 | PyObject *iterable; |
| 631 | PyObject *saved; |
| 632 | cycleobject *lz; |
| 633 | |
| 634 | if (!PyArg_UnpackTuple(args, "cycle", 1, 1, &iterable)) |
| 635 | return NULL; |
| 636 | |
| 637 | /* Get iterator. */ |
| 638 | it = PyObject_GetIter(iterable); |
| 639 | if (it == NULL) |
| 640 | return NULL; |
| 641 | |
| 642 | saved = PyList_New(0); |
| 643 | if (saved == NULL) { |
| 644 | Py_DECREF(it); |
| 645 | return NULL; |
| 646 | } |
| 647 | |
| 648 | /* create cycleobject structure */ |
| 649 | lz = (cycleobject *)type->tp_alloc(type, 0); |
| 650 | if (lz == NULL) { |
| 651 | Py_DECREF(it); |
| 652 | Py_DECREF(saved); |
| 653 | return NULL; |
| 654 | } |
| 655 | lz->it = it; |
| 656 | lz->saved = saved; |
| 657 | lz->firstpass = 0; |
| 658 | |
| 659 | return (PyObject *)lz; |
| 660 | } |
| 661 | |
| 662 | static void |
| 663 | cycle_dealloc(cycleobject *lz) |
| 664 | { |
| 665 | PyObject_GC_UnTrack(lz); |
| 666 | Py_XDECREF(lz->saved); |
| 667 | Py_XDECREF(lz->it); |
| 668 | lz->ob_type->tp_free(lz); |
| 669 | } |
| 670 | |
| 671 | static int |
| 672 | cycle_traverse(cycleobject *lz, visitproc visit, void *arg) |
| 673 | { |
| 674 | int err; |
| 675 | |
| 676 | if (lz->it) { |
| 677 | err = visit(lz->it, arg); |
| 678 | if (err) |
| 679 | return err; |
| 680 | } |
| 681 | if (lz->saved) { |
| 682 | err = visit(lz->saved, arg); |
| 683 | if (err) |
| 684 | return err; |
| 685 | } |
| 686 | return 0; |
| 687 | } |
| 688 | |
| 689 | static PyObject * |
| 690 | cycle_next(cycleobject *lz) |
| 691 | { |
| 692 | PyObject *item; |
| 693 | PyObject *it; |
| 694 | |
| 695 | while (1) { |
| 696 | item = PyIter_Next(lz->it); |
| 697 | if (item != NULL) { |
| 698 | if (!lz->firstpass) |
| 699 | PyList_Append(lz->saved, item); |
| 700 | return item; |
| 701 | } |
Raymond Hettinger | 9d7c870 | 2004-05-08 19:49:42 +0000 | [diff] [blame] | 702 | if (PyErr_Occurred()) { |
| 703 | if (PyErr_ExceptionMatches(PyExc_StopIteration)) |
| 704 | PyErr_Clear(); |
| 705 | else |
| 706 | return NULL; |
| 707 | } |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 708 | if (PyList_Size(lz->saved) == 0) |
| 709 | return NULL; |
| 710 | it = PyObject_GetIter(lz->saved); |
| 711 | if (it == NULL) |
| 712 | return NULL; |
| 713 | Py_DECREF(lz->it); |
| 714 | lz->it = it; |
| 715 | lz->firstpass = 1; |
| 716 | } |
| 717 | } |
| 718 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 719 | PyDoc_STRVAR(cycle_doc, |
| 720 | "cycle(iterable) --> cycle object\n\ |
| 721 | \n\ |
| 722 | Return elements from the iterable until it is exhausted.\n\ |
| 723 | Then repeat the sequence indefinitely."); |
| 724 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 725 | static PyTypeObject cycle_type = { |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 726 | PyObject_HEAD_INIT(NULL) |
| 727 | 0, /* ob_size */ |
| 728 | "itertools.cycle", /* tp_name */ |
| 729 | sizeof(cycleobject), /* tp_basicsize */ |
| 730 | 0, /* tp_itemsize */ |
| 731 | /* methods */ |
| 732 | (destructor)cycle_dealloc, /* tp_dealloc */ |
| 733 | 0, /* tp_print */ |
| 734 | 0, /* tp_getattr */ |
| 735 | 0, /* tp_setattr */ |
| 736 | 0, /* tp_compare */ |
| 737 | 0, /* tp_repr */ |
| 738 | 0, /* tp_as_number */ |
| 739 | 0, /* tp_as_sequence */ |
| 740 | 0, /* tp_as_mapping */ |
| 741 | 0, /* tp_hash */ |
| 742 | 0, /* tp_call */ |
| 743 | 0, /* tp_str */ |
| 744 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 745 | 0, /* tp_setattro */ |
| 746 | 0, /* tp_as_buffer */ |
| 747 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 748 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| 749 | cycle_doc, /* tp_doc */ |
| 750 | (traverseproc)cycle_traverse, /* tp_traverse */ |
| 751 | 0, /* tp_clear */ |
| 752 | 0, /* tp_richcompare */ |
| 753 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 754 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 755 | (iternextfunc)cycle_next, /* tp_iternext */ |
| 756 | 0, /* tp_methods */ |
| 757 | 0, /* tp_members */ |
| 758 | 0, /* tp_getset */ |
| 759 | 0, /* tp_base */ |
| 760 | 0, /* tp_dict */ |
| 761 | 0, /* tp_descr_get */ |
| 762 | 0, /* tp_descr_set */ |
| 763 | 0, /* tp_dictoffset */ |
| 764 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 765 | 0, /* tp_alloc */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 766 | cycle_new, /* tp_new */ |
| 767 | PyObject_GC_Del, /* tp_free */ |
| 768 | }; |
| 769 | |
| 770 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 771 | /* dropwhile object **********************************************************/ |
| 772 | |
| 773 | typedef struct { |
| 774 | PyObject_HEAD |
| 775 | PyObject *func; |
| 776 | PyObject *it; |
| 777 | long start; |
| 778 | } dropwhileobject; |
| 779 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 780 | static PyTypeObject dropwhile_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 781 | |
| 782 | static PyObject * |
| 783 | dropwhile_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 784 | { |
| 785 | PyObject *func, *seq; |
| 786 | PyObject *it; |
| 787 | dropwhileobject *lz; |
| 788 | |
| 789 | if (!PyArg_UnpackTuple(args, "dropwhile", 2, 2, &func, &seq)) |
| 790 | return NULL; |
| 791 | |
| 792 | /* Get iterator. */ |
| 793 | it = PyObject_GetIter(seq); |
| 794 | if (it == NULL) |
| 795 | return NULL; |
| 796 | |
| 797 | /* create dropwhileobject structure */ |
| 798 | lz = (dropwhileobject *)type->tp_alloc(type, 0); |
| 799 | if (lz == NULL) { |
| 800 | Py_DECREF(it); |
| 801 | return NULL; |
| 802 | } |
| 803 | Py_INCREF(func); |
| 804 | lz->func = func; |
| 805 | lz->it = it; |
| 806 | lz->start = 0; |
| 807 | |
| 808 | return (PyObject *)lz; |
| 809 | } |
| 810 | |
| 811 | static void |
| 812 | dropwhile_dealloc(dropwhileobject *lz) |
| 813 | { |
| 814 | PyObject_GC_UnTrack(lz); |
| 815 | Py_XDECREF(lz->func); |
| 816 | Py_XDECREF(lz->it); |
| 817 | lz->ob_type->tp_free(lz); |
| 818 | } |
| 819 | |
| 820 | static int |
| 821 | dropwhile_traverse(dropwhileobject *lz, visitproc visit, void *arg) |
| 822 | { |
| 823 | int err; |
| 824 | |
| 825 | if (lz->it) { |
| 826 | err = visit(lz->it, arg); |
| 827 | if (err) |
| 828 | return err; |
| 829 | } |
| 830 | if (lz->func) { |
| 831 | err = visit(lz->func, arg); |
| 832 | if (err) |
| 833 | return err; |
| 834 | } |
| 835 | return 0; |
| 836 | } |
| 837 | |
| 838 | static PyObject * |
| 839 | dropwhile_next(dropwhileobject *lz) |
| 840 | { |
| 841 | PyObject *item, *good; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 842 | PyObject *it = lz->it; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 843 | long ok; |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 844 | PyObject *(*iternext)(PyObject *); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 845 | |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 846 | assert(PyIter_Check(it)); |
| 847 | iternext = *it->ob_type->tp_iternext; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 848 | for (;;) { |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 849 | item = iternext(it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 850 | if (item == NULL) |
| 851 | return NULL; |
| 852 | if (lz->start == 1) |
| 853 | return item; |
| 854 | |
| 855 | good = PyObject_CallFunctionObjArgs(lz->func, item, NULL); |
| 856 | if (good == NULL) { |
| 857 | Py_DECREF(item); |
| 858 | return NULL; |
| 859 | } |
| 860 | ok = PyObject_IsTrue(good); |
| 861 | Py_DECREF(good); |
| 862 | if (!ok) { |
| 863 | lz->start = 1; |
| 864 | return item; |
| 865 | } |
| 866 | Py_DECREF(item); |
| 867 | } |
| 868 | } |
| 869 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 870 | PyDoc_STRVAR(dropwhile_doc, |
| 871 | "dropwhile(predicate, iterable) --> dropwhile object\n\ |
| 872 | \n\ |
| 873 | Drop items from the iterable while predicate(item) is true.\n\ |
| 874 | Afterwards, return every element until the iterable is exhausted."); |
| 875 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 876 | static PyTypeObject dropwhile_type = { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 877 | PyObject_HEAD_INIT(NULL) |
| 878 | 0, /* ob_size */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 879 | "itertools.dropwhile", /* tp_name */ |
| 880 | sizeof(dropwhileobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 881 | 0, /* tp_itemsize */ |
| 882 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 883 | (destructor)dropwhile_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 884 | 0, /* tp_print */ |
| 885 | 0, /* tp_getattr */ |
| 886 | 0, /* tp_setattr */ |
| 887 | 0, /* tp_compare */ |
| 888 | 0, /* tp_repr */ |
| 889 | 0, /* tp_as_number */ |
| 890 | 0, /* tp_as_sequence */ |
| 891 | 0, /* tp_as_mapping */ |
| 892 | 0, /* tp_hash */ |
| 893 | 0, /* tp_call */ |
| 894 | 0, /* tp_str */ |
| 895 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 896 | 0, /* tp_setattro */ |
| 897 | 0, /* tp_as_buffer */ |
| 898 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 899 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 900 | dropwhile_doc, /* tp_doc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 901 | (traverseproc)dropwhile_traverse, /* tp_traverse */ |
| 902 | 0, /* tp_clear */ |
| 903 | 0, /* tp_richcompare */ |
| 904 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 905 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 906 | (iternextfunc)dropwhile_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 907 | 0, /* tp_methods */ |
| 908 | 0, /* tp_members */ |
| 909 | 0, /* tp_getset */ |
| 910 | 0, /* tp_base */ |
| 911 | 0, /* tp_dict */ |
| 912 | 0, /* tp_descr_get */ |
| 913 | 0, /* tp_descr_set */ |
| 914 | 0, /* tp_dictoffset */ |
| 915 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 916 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 917 | dropwhile_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 918 | PyObject_GC_Del, /* tp_free */ |
| 919 | }; |
| 920 | |
| 921 | |
| 922 | /* takewhile object **********************************************************/ |
| 923 | |
| 924 | typedef struct { |
| 925 | PyObject_HEAD |
| 926 | PyObject *func; |
| 927 | PyObject *it; |
| 928 | long stop; |
| 929 | } takewhileobject; |
| 930 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 931 | static PyTypeObject takewhile_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 932 | |
| 933 | static PyObject * |
| 934 | takewhile_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 935 | { |
| 936 | PyObject *func, *seq; |
| 937 | PyObject *it; |
| 938 | takewhileobject *lz; |
| 939 | |
| 940 | if (!PyArg_UnpackTuple(args, "takewhile", 2, 2, &func, &seq)) |
| 941 | return NULL; |
| 942 | |
| 943 | /* Get iterator. */ |
| 944 | it = PyObject_GetIter(seq); |
| 945 | if (it == NULL) |
| 946 | return NULL; |
| 947 | |
| 948 | /* create takewhileobject structure */ |
| 949 | lz = (takewhileobject *)type->tp_alloc(type, 0); |
| 950 | if (lz == NULL) { |
| 951 | Py_DECREF(it); |
| 952 | return NULL; |
| 953 | } |
| 954 | Py_INCREF(func); |
| 955 | lz->func = func; |
| 956 | lz->it = it; |
| 957 | lz->stop = 0; |
| 958 | |
| 959 | return (PyObject *)lz; |
| 960 | } |
| 961 | |
| 962 | static void |
| 963 | takewhile_dealloc(takewhileobject *lz) |
| 964 | { |
| 965 | PyObject_GC_UnTrack(lz); |
| 966 | Py_XDECREF(lz->func); |
| 967 | Py_XDECREF(lz->it); |
| 968 | lz->ob_type->tp_free(lz); |
| 969 | } |
| 970 | |
| 971 | static int |
| 972 | takewhile_traverse(takewhileobject *lz, visitproc visit, void *arg) |
| 973 | { |
| 974 | int err; |
| 975 | |
| 976 | if (lz->it) { |
| 977 | err = visit(lz->it, arg); |
| 978 | if (err) |
| 979 | return err; |
| 980 | } |
| 981 | if (lz->func) { |
| 982 | err = visit(lz->func, arg); |
| 983 | if (err) |
| 984 | return err; |
| 985 | } |
| 986 | return 0; |
| 987 | } |
| 988 | |
| 989 | static PyObject * |
| 990 | takewhile_next(takewhileobject *lz) |
| 991 | { |
| 992 | PyObject *item, *good; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 993 | PyObject *it = lz->it; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 994 | long ok; |
| 995 | |
| 996 | if (lz->stop == 1) |
| 997 | return NULL; |
| 998 | |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 999 | assert(PyIter_Check(it)); |
| 1000 | item = (*it->ob_type->tp_iternext)(it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1001 | if (item == NULL) |
| 1002 | return NULL; |
| 1003 | |
| 1004 | good = PyObject_CallFunctionObjArgs(lz->func, item, NULL); |
| 1005 | if (good == NULL) { |
| 1006 | Py_DECREF(item); |
| 1007 | return NULL; |
| 1008 | } |
| 1009 | ok = PyObject_IsTrue(good); |
| 1010 | Py_DECREF(good); |
| 1011 | if (ok) |
| 1012 | return item; |
| 1013 | Py_DECREF(item); |
| 1014 | lz->stop = 1; |
| 1015 | return NULL; |
| 1016 | } |
| 1017 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1018 | PyDoc_STRVAR(takewhile_doc, |
| 1019 | "takewhile(predicate, iterable) --> takewhile object\n\ |
| 1020 | \n\ |
| 1021 | Return successive entries from an iterable as long as the \n\ |
| 1022 | predicate evaluates to true for each entry."); |
| 1023 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1024 | static PyTypeObject takewhile_type = { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1025 | PyObject_HEAD_INIT(NULL) |
| 1026 | 0, /* ob_size */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1027 | "itertools.takewhile", /* tp_name */ |
| 1028 | sizeof(takewhileobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1029 | 0, /* tp_itemsize */ |
| 1030 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1031 | (destructor)takewhile_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1032 | 0, /* tp_print */ |
| 1033 | 0, /* tp_getattr */ |
| 1034 | 0, /* tp_setattr */ |
| 1035 | 0, /* tp_compare */ |
| 1036 | 0, /* tp_repr */ |
| 1037 | 0, /* tp_as_number */ |
| 1038 | 0, /* tp_as_sequence */ |
| 1039 | 0, /* tp_as_mapping */ |
| 1040 | 0, /* tp_hash */ |
| 1041 | 0, /* tp_call */ |
| 1042 | 0, /* tp_str */ |
| 1043 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 1044 | 0, /* tp_setattro */ |
| 1045 | 0, /* tp_as_buffer */ |
| 1046 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 1047 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1048 | takewhile_doc, /* tp_doc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1049 | (traverseproc)takewhile_traverse, /* tp_traverse */ |
| 1050 | 0, /* tp_clear */ |
| 1051 | 0, /* tp_richcompare */ |
| 1052 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 1053 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1054 | (iternextfunc)takewhile_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1055 | 0, /* tp_methods */ |
| 1056 | 0, /* tp_members */ |
| 1057 | 0, /* tp_getset */ |
| 1058 | 0, /* tp_base */ |
| 1059 | 0, /* tp_dict */ |
| 1060 | 0, /* tp_descr_get */ |
| 1061 | 0, /* tp_descr_set */ |
| 1062 | 0, /* tp_dictoffset */ |
| 1063 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 1064 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1065 | takewhile_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1066 | PyObject_GC_Del, /* tp_free */ |
| 1067 | }; |
| 1068 | |
| 1069 | |
| 1070 | /* islice object ************************************************************/ |
| 1071 | |
| 1072 | typedef struct { |
| 1073 | PyObject_HEAD |
| 1074 | PyObject *it; |
| 1075 | long next; |
| 1076 | long stop; |
| 1077 | long step; |
| 1078 | long cnt; |
| 1079 | } isliceobject; |
| 1080 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1081 | static PyTypeObject islice_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1082 | |
| 1083 | static PyObject * |
| 1084 | islice_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 1085 | { |
| 1086 | PyObject *seq; |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1087 | long start=0, stop=-1, step=1; |
| 1088 | PyObject *it, *a1=NULL, *a2=NULL; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1089 | int numargs; |
| 1090 | isliceobject *lz; |
| 1091 | |
| 1092 | numargs = PyTuple_Size(args); |
Raymond Hettinger | 341deb7 | 2003-05-02 19:44:20 +0000 | [diff] [blame] | 1093 | if (!PyArg_ParseTuple(args, "OO|Ol:islice", &seq, &a1, &a2, &step)) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1094 | return NULL; |
| 1095 | |
| 1096 | if (numargs == 2) { |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1097 | if (a1 != Py_None) { |
| 1098 | stop = PyInt_AsLong(a1); |
| 1099 | if (stop == -1) { |
| 1100 | if (PyErr_Occurred()) |
| 1101 | PyErr_Clear(); |
| 1102 | PyErr_SetString(PyExc_ValueError, |
Raymond Hettinger | 0e4f764 | 2003-10-28 07:32:28 +0000 | [diff] [blame] | 1103 | "Stop argument must be a non-negative integer or None."); |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1104 | return NULL; |
| 1105 | } |
| 1106 | } |
Raymond Hettinger | 341deb7 | 2003-05-02 19:44:20 +0000 | [diff] [blame] | 1107 | } else { |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1108 | start = PyInt_AsLong(a1); |
| 1109 | if (start == -1 && PyErr_Occurred()) { |
| 1110 | PyErr_Clear(); |
| 1111 | PyErr_SetString(PyExc_ValueError, |
Raymond Hettinger | 0e4f764 | 2003-10-28 07:32:28 +0000 | [diff] [blame] | 1112 | "Start argument must be a non-negative integer."); |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1113 | return NULL; |
| 1114 | } |
| 1115 | if (a2 != Py_None) { |
| 1116 | stop = PyInt_AsLong(a2); |
| 1117 | if (stop == -1) { |
| 1118 | if (PyErr_Occurred()) |
| 1119 | PyErr_Clear(); |
| 1120 | PyErr_SetString(PyExc_ValueError, |
Raymond Hettinger | 0e4f764 | 2003-10-28 07:32:28 +0000 | [diff] [blame] | 1121 | "Stop argument must be a non-negative integer or None."); |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1122 | return NULL; |
| 1123 | } |
| 1124 | } |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1125 | } |
| 1126 | |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1127 | if (start<0 || stop<-1) { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1128 | PyErr_SetString(PyExc_ValueError, |
Raymond Hettinger | 0e4f764 | 2003-10-28 07:32:28 +0000 | [diff] [blame] | 1129 | "Indices for islice() must be non-negative integers."); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1130 | return NULL; |
| 1131 | } |
| 1132 | |
| 1133 | if (step<1) { |
| 1134 | PyErr_SetString(PyExc_ValueError, |
| 1135 | "Step must be one or larger for islice()."); |
| 1136 | return NULL; |
| 1137 | } |
| 1138 | |
| 1139 | /* Get iterator. */ |
| 1140 | it = PyObject_GetIter(seq); |
| 1141 | if (it == NULL) |
| 1142 | return NULL; |
| 1143 | |
| 1144 | /* create isliceobject structure */ |
| 1145 | lz = (isliceobject *)type->tp_alloc(type, 0); |
| 1146 | if (lz == NULL) { |
| 1147 | Py_DECREF(it); |
| 1148 | return NULL; |
| 1149 | } |
| 1150 | lz->it = it; |
| 1151 | lz->next = start; |
| 1152 | lz->stop = stop; |
| 1153 | lz->step = step; |
| 1154 | lz->cnt = 0L; |
| 1155 | |
| 1156 | return (PyObject *)lz; |
| 1157 | } |
| 1158 | |
| 1159 | static void |
| 1160 | islice_dealloc(isliceobject *lz) |
| 1161 | { |
| 1162 | PyObject_GC_UnTrack(lz); |
| 1163 | Py_XDECREF(lz->it); |
| 1164 | lz->ob_type->tp_free(lz); |
| 1165 | } |
| 1166 | |
| 1167 | static int |
| 1168 | islice_traverse(isliceobject *lz, visitproc visit, void *arg) |
| 1169 | { |
| 1170 | if (lz->it) |
| 1171 | return visit(lz->it, arg); |
| 1172 | return 0; |
| 1173 | } |
| 1174 | |
| 1175 | static PyObject * |
| 1176 | islice_next(isliceobject *lz) |
| 1177 | { |
| 1178 | PyObject *item; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 1179 | PyObject *it = lz->it; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1180 | long oldnext; |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1181 | PyObject *(*iternext)(PyObject *); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1182 | |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1183 | assert(PyIter_Check(it)); |
| 1184 | iternext = *it->ob_type->tp_iternext; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1185 | while (lz->cnt < lz->next) { |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1186 | item = iternext(it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1187 | if (item == NULL) |
| 1188 | return NULL; |
| 1189 | Py_DECREF(item); |
| 1190 | lz->cnt++; |
| 1191 | } |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1192 | if (lz->stop != -1 && lz->cnt >= lz->stop) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1193 | return NULL; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 1194 | assert(PyIter_Check(it)); |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1195 | item = iternext(it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1196 | if (item == NULL) |
| 1197 | return NULL; |
| 1198 | lz->cnt++; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1199 | oldnext = lz->next; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1200 | lz->next += lz->step; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1201 | if (lz->next < oldnext) /* Check for overflow */ |
| 1202 | lz->next = lz->stop; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1203 | return item; |
| 1204 | } |
| 1205 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1206 | PyDoc_STRVAR(islice_doc, |
| 1207 | "islice(iterable, [start,] stop [, step]) --> islice object\n\ |
| 1208 | \n\ |
| 1209 | Return an iterator whose next() method returns selected values from an\n\ |
| 1210 | iterable. If start is specified, will skip all preceding elements;\n\ |
| 1211 | otherwise, start defaults to zero. Step defaults to one. If\n\ |
| 1212 | specified as another value, step determines how many values are \n\ |
| 1213 | skipped between successive calls. Works like a slice() on a list\n\ |
| 1214 | but returns an iterator."); |
| 1215 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1216 | static PyTypeObject islice_type = { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1217 | PyObject_HEAD_INIT(NULL) |
| 1218 | 0, /* ob_size */ |
| 1219 | "itertools.islice", /* tp_name */ |
| 1220 | sizeof(isliceobject), /* tp_basicsize */ |
| 1221 | 0, /* tp_itemsize */ |
| 1222 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1223 | (destructor)islice_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1224 | 0, /* tp_print */ |
| 1225 | 0, /* tp_getattr */ |
| 1226 | 0, /* tp_setattr */ |
| 1227 | 0, /* tp_compare */ |
| 1228 | 0, /* tp_repr */ |
| 1229 | 0, /* tp_as_number */ |
| 1230 | 0, /* tp_as_sequence */ |
| 1231 | 0, /* tp_as_mapping */ |
| 1232 | 0, /* tp_hash */ |
| 1233 | 0, /* tp_call */ |
| 1234 | 0, /* tp_str */ |
| 1235 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 1236 | 0, /* tp_setattro */ |
| 1237 | 0, /* tp_as_buffer */ |
| 1238 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 1239 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1240 | islice_doc, /* tp_doc */ |
| 1241 | (traverseproc)islice_traverse, /* tp_traverse */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1242 | 0, /* tp_clear */ |
| 1243 | 0, /* tp_richcompare */ |
| 1244 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 1245 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1246 | (iternextfunc)islice_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1247 | 0, /* tp_methods */ |
| 1248 | 0, /* tp_members */ |
| 1249 | 0, /* tp_getset */ |
| 1250 | 0, /* tp_base */ |
| 1251 | 0, /* tp_dict */ |
| 1252 | 0, /* tp_descr_get */ |
| 1253 | 0, /* tp_descr_set */ |
| 1254 | 0, /* tp_dictoffset */ |
| 1255 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 1256 | 0, /* tp_alloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1257 | islice_new, /* tp_new */ |
| 1258 | PyObject_GC_Del, /* tp_free */ |
| 1259 | }; |
| 1260 | |
| 1261 | |
| 1262 | /* starmap object ************************************************************/ |
| 1263 | |
| 1264 | typedef struct { |
| 1265 | PyObject_HEAD |
| 1266 | PyObject *func; |
| 1267 | PyObject *it; |
| 1268 | } starmapobject; |
| 1269 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1270 | static PyTypeObject starmap_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1271 | |
| 1272 | static PyObject * |
| 1273 | starmap_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 1274 | { |
| 1275 | PyObject *func, *seq; |
| 1276 | PyObject *it; |
| 1277 | starmapobject *lz; |
| 1278 | |
| 1279 | if (!PyArg_UnpackTuple(args, "starmap", 2, 2, &func, &seq)) |
| 1280 | return NULL; |
| 1281 | |
| 1282 | /* Get iterator. */ |
| 1283 | it = PyObject_GetIter(seq); |
| 1284 | if (it == NULL) |
| 1285 | return NULL; |
| 1286 | |
| 1287 | /* create starmapobject structure */ |
| 1288 | lz = (starmapobject *)type->tp_alloc(type, 0); |
| 1289 | if (lz == NULL) { |
| 1290 | Py_DECREF(it); |
| 1291 | return NULL; |
| 1292 | } |
| 1293 | Py_INCREF(func); |
| 1294 | lz->func = func; |
| 1295 | lz->it = it; |
| 1296 | |
| 1297 | return (PyObject *)lz; |
| 1298 | } |
| 1299 | |
| 1300 | static void |
| 1301 | starmap_dealloc(starmapobject *lz) |
| 1302 | { |
| 1303 | PyObject_GC_UnTrack(lz); |
| 1304 | Py_XDECREF(lz->func); |
| 1305 | Py_XDECREF(lz->it); |
| 1306 | lz->ob_type->tp_free(lz); |
| 1307 | } |
| 1308 | |
| 1309 | static int |
| 1310 | starmap_traverse(starmapobject *lz, visitproc visit, void *arg) |
| 1311 | { |
| 1312 | int err; |
| 1313 | |
| 1314 | if (lz->it) { |
| 1315 | err = visit(lz->it, arg); |
| 1316 | if (err) |
| 1317 | return err; |
| 1318 | } |
| 1319 | if (lz->func) { |
| 1320 | err = visit(lz->func, arg); |
| 1321 | if (err) |
| 1322 | return err; |
| 1323 | } |
| 1324 | return 0; |
| 1325 | } |
| 1326 | |
| 1327 | static PyObject * |
| 1328 | starmap_next(starmapobject *lz) |
| 1329 | { |
| 1330 | PyObject *args; |
| 1331 | PyObject *result; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 1332 | PyObject *it = lz->it; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1333 | |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 1334 | assert(PyIter_Check(it)); |
| 1335 | args = (*it->ob_type->tp_iternext)(it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1336 | if (args == NULL) |
| 1337 | return NULL; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1338 | if (!PyTuple_CheckExact(args)) { |
| 1339 | Py_DECREF(args); |
| 1340 | PyErr_SetString(PyExc_TypeError, |
| 1341 | "iterator must return a tuple"); |
| 1342 | return NULL; |
| 1343 | } |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1344 | result = PyObject_Call(lz->func, args, NULL); |
| 1345 | Py_DECREF(args); |
| 1346 | return result; |
| 1347 | } |
| 1348 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1349 | PyDoc_STRVAR(starmap_doc, |
| 1350 | "starmap(function, sequence) --> starmap object\n\ |
| 1351 | \n\ |
| 1352 | Return an iterator whose values are returned from the function evaluated\n\ |
| 1353 | with a argument tuple taken from the given sequence."); |
| 1354 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1355 | static PyTypeObject starmap_type = { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1356 | PyObject_HEAD_INIT(NULL) |
| 1357 | 0, /* ob_size */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1358 | "itertools.starmap", /* tp_name */ |
| 1359 | sizeof(starmapobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1360 | 0, /* tp_itemsize */ |
| 1361 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1362 | (destructor)starmap_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1363 | 0, /* tp_print */ |
| 1364 | 0, /* tp_getattr */ |
| 1365 | 0, /* tp_setattr */ |
| 1366 | 0, /* tp_compare */ |
| 1367 | 0, /* tp_repr */ |
| 1368 | 0, /* tp_as_number */ |
| 1369 | 0, /* tp_as_sequence */ |
| 1370 | 0, /* tp_as_mapping */ |
| 1371 | 0, /* tp_hash */ |
| 1372 | 0, /* tp_call */ |
| 1373 | 0, /* tp_str */ |
| 1374 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 1375 | 0, /* tp_setattro */ |
| 1376 | 0, /* tp_as_buffer */ |
| 1377 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 1378 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1379 | starmap_doc, /* tp_doc */ |
| 1380 | (traverseproc)starmap_traverse, /* tp_traverse */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1381 | 0, /* tp_clear */ |
| 1382 | 0, /* tp_richcompare */ |
| 1383 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 1384 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1385 | (iternextfunc)starmap_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1386 | 0, /* tp_methods */ |
| 1387 | 0, /* tp_members */ |
| 1388 | 0, /* tp_getset */ |
| 1389 | 0, /* tp_base */ |
| 1390 | 0, /* tp_dict */ |
| 1391 | 0, /* tp_descr_get */ |
| 1392 | 0, /* tp_descr_set */ |
| 1393 | 0, /* tp_dictoffset */ |
| 1394 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 1395 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1396 | starmap_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1397 | PyObject_GC_Del, /* tp_free */ |
| 1398 | }; |
| 1399 | |
| 1400 | |
| 1401 | /* imap object ************************************************************/ |
| 1402 | |
| 1403 | typedef struct { |
| 1404 | PyObject_HEAD |
| 1405 | PyObject *iters; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1406 | PyObject *func; |
| 1407 | } imapobject; |
| 1408 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1409 | static PyTypeObject imap_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1410 | |
| 1411 | static PyObject * |
| 1412 | imap_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 1413 | { |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 1414 | PyObject *it, *iters, *func; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1415 | imapobject *lz; |
| 1416 | int numargs, i; |
| 1417 | |
| 1418 | numargs = PyTuple_Size(args); |
| 1419 | if (numargs < 2) { |
| 1420 | PyErr_SetString(PyExc_TypeError, |
| 1421 | "imap() must have at least two arguments."); |
| 1422 | return NULL; |
| 1423 | } |
| 1424 | |
| 1425 | iters = PyTuple_New(numargs-1); |
| 1426 | if (iters == NULL) |
| 1427 | return NULL; |
| 1428 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1429 | for (i=1 ; i<numargs ; i++) { |
| 1430 | /* Get iterator. */ |
| 1431 | it = PyObject_GetIter(PyTuple_GET_ITEM(args, i)); |
| 1432 | if (it == NULL) { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1433 | Py_DECREF(iters); |
| 1434 | return NULL; |
| 1435 | } |
| 1436 | PyTuple_SET_ITEM(iters, i-1, it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1437 | } |
| 1438 | |
| 1439 | /* create imapobject structure */ |
| 1440 | lz = (imapobject *)type->tp_alloc(type, 0); |
| 1441 | if (lz == NULL) { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1442 | Py_DECREF(iters); |
| 1443 | return NULL; |
| 1444 | } |
| 1445 | lz->iters = iters; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1446 | func = PyTuple_GET_ITEM(args, 0); |
| 1447 | Py_INCREF(func); |
| 1448 | lz->func = func; |
| 1449 | |
| 1450 | return (PyObject *)lz; |
| 1451 | } |
| 1452 | |
| 1453 | static void |
| 1454 | imap_dealloc(imapobject *lz) |
| 1455 | { |
| 1456 | PyObject_GC_UnTrack(lz); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1457 | Py_XDECREF(lz->iters); |
| 1458 | Py_XDECREF(lz->func); |
| 1459 | lz->ob_type->tp_free(lz); |
| 1460 | } |
| 1461 | |
| 1462 | static int |
| 1463 | imap_traverse(imapobject *lz, visitproc visit, void *arg) |
| 1464 | { |
| 1465 | int err; |
| 1466 | |
| 1467 | if (lz->iters) { |
| 1468 | err = visit(lz->iters, arg); |
| 1469 | if (err) |
| 1470 | return err; |
| 1471 | } |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1472 | if (lz->func) { |
| 1473 | err = visit(lz->func, arg); |
| 1474 | if (err) |
| 1475 | return err; |
| 1476 | } |
| 1477 | return 0; |
| 1478 | } |
| 1479 | |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1480 | /* |
| 1481 | imap() is an iterator version of __builtins__.map() except that it does |
| 1482 | not have the None fill-in feature. That was intentionally left out for |
| 1483 | the following reasons: |
| 1484 | |
| 1485 | 1) Itertools are designed to be easily combined and chained together. |
| 1486 | Having all tools stop with the shortest input is a unifying principle |
| 1487 | that makes it easier to combine finite iterators (supplying data) with |
| 1488 | infinite iterators like count() and repeat() (for supplying sequential |
| 1489 | or constant arguments to a function). |
| 1490 | |
| 1491 | 2) In typical use cases for combining itertools, having one finite data |
| 1492 | supplier run out before another is likely to be an error condition which |
| 1493 | should not pass silently by automatically supplying None. |
| 1494 | |
| 1495 | 3) The use cases for automatic None fill-in are rare -- not many functions |
| 1496 | do something useful when a parameter suddenly switches type and becomes |
| 1497 | None. |
| 1498 | |
| 1499 | 4) If a need does arise, it can be met by __builtins__.map() or by |
Raymond Hettinger | befa37d | 2003-06-18 19:25:37 +0000 | [diff] [blame] | 1500 | writing: chain(iterable, repeat(None)). |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1501 | |
| 1502 | 5) Similar toolsets in Haskell and SML do not have automatic None fill-in. |
| 1503 | */ |
| 1504 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1505 | static PyObject * |
| 1506 | imap_next(imapobject *lz) |
| 1507 | { |
| 1508 | PyObject *val; |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 1509 | PyObject *argtuple; |
| 1510 | PyObject *result; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1511 | int numargs, i; |
| 1512 | |
| 1513 | numargs = PyTuple_Size(lz->iters); |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 1514 | argtuple = PyTuple_New(numargs); |
| 1515 | if (argtuple == NULL) |
| 1516 | return NULL; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1517 | |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 1518 | for (i=0 ; i<numargs ; i++) { |
| 1519 | val = PyIter_Next(PyTuple_GET_ITEM(lz->iters, i)); |
| 1520 | if (val == NULL) { |
| 1521 | Py_DECREF(argtuple); |
| 1522 | return NULL; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1523 | } |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 1524 | PyTuple_SET_ITEM(argtuple, i, val); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1525 | } |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 1526 | if (lz->func == Py_None) |
| 1527 | return argtuple; |
| 1528 | result = PyObject_Call(lz->func, argtuple, NULL); |
| 1529 | Py_DECREF(argtuple); |
| 1530 | return result; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1531 | } |
| 1532 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1533 | PyDoc_STRVAR(imap_doc, |
| 1534 | "imap(func, *iterables) --> imap object\n\ |
| 1535 | \n\ |
| 1536 | Make an iterator that computes the function using arguments from\n\ |
| 1537 | each of the iterables. Like map() except that it returns\n\ |
| 1538 | an iterator instead of a list and that it stops when the shortest\n\ |
| 1539 | iterable is exhausted instead of filling in None for shorter\n\ |
| 1540 | iterables."); |
| 1541 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1542 | static PyTypeObject imap_type = { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1543 | PyObject_HEAD_INIT(NULL) |
| 1544 | 0, /* ob_size */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1545 | "itertools.imap", /* tp_name */ |
| 1546 | sizeof(imapobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1547 | 0, /* tp_itemsize */ |
| 1548 | /* methods */ |
| 1549 | (destructor)imap_dealloc, /* tp_dealloc */ |
| 1550 | 0, /* tp_print */ |
| 1551 | 0, /* tp_getattr */ |
| 1552 | 0, /* tp_setattr */ |
| 1553 | 0, /* tp_compare */ |
| 1554 | 0, /* tp_repr */ |
| 1555 | 0, /* tp_as_number */ |
| 1556 | 0, /* tp_as_sequence */ |
| 1557 | 0, /* tp_as_mapping */ |
| 1558 | 0, /* tp_hash */ |
| 1559 | 0, /* tp_call */ |
| 1560 | 0, /* tp_str */ |
| 1561 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 1562 | 0, /* tp_setattro */ |
| 1563 | 0, /* tp_as_buffer */ |
| 1564 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 1565 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| 1566 | imap_doc, /* tp_doc */ |
| 1567 | (traverseproc)imap_traverse, /* tp_traverse */ |
| 1568 | 0, /* tp_clear */ |
| 1569 | 0, /* tp_richcompare */ |
| 1570 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 1571 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1572 | (iternextfunc)imap_next, /* tp_iternext */ |
| 1573 | 0, /* tp_methods */ |
| 1574 | 0, /* tp_members */ |
| 1575 | 0, /* tp_getset */ |
| 1576 | 0, /* tp_base */ |
| 1577 | 0, /* tp_dict */ |
| 1578 | 0, /* tp_descr_get */ |
| 1579 | 0, /* tp_descr_set */ |
| 1580 | 0, /* tp_dictoffset */ |
| 1581 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 1582 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1583 | imap_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1584 | PyObject_GC_Del, /* tp_free */ |
| 1585 | }; |
| 1586 | |
| 1587 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1588 | /* chain object ************************************************************/ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1589 | |
| 1590 | typedef struct { |
| 1591 | PyObject_HEAD |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1592 | long tuplesize; |
| 1593 | long iternum; /* which iterator is active */ |
| 1594 | PyObject *ittuple; /* tuple of iterators */ |
| 1595 | } chainobject; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1596 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1597 | static PyTypeObject chain_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1598 | |
| 1599 | static PyObject * |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1600 | chain_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1601 | { |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1602 | chainobject *lz; |
| 1603 | int tuplesize = PySequence_Length(args); |
| 1604 | int i; |
| 1605 | PyObject *ittuple; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1606 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1607 | /* obtain iterators */ |
| 1608 | assert(PyTuple_Check(args)); |
| 1609 | ittuple = PyTuple_New(tuplesize); |
| 1610 | if(ittuple == NULL) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1611 | return NULL; |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1612 | for (i=0; i < tuplesize; ++i) { |
| 1613 | PyObject *item = PyTuple_GET_ITEM(args, i); |
| 1614 | PyObject *it = PyObject_GetIter(item); |
| 1615 | if (it == NULL) { |
| 1616 | if (PyErr_ExceptionMatches(PyExc_TypeError)) |
| 1617 | PyErr_Format(PyExc_TypeError, |
| 1618 | "chain argument #%d must support iteration", |
| 1619 | i+1); |
| 1620 | Py_DECREF(ittuple); |
| 1621 | return NULL; |
| 1622 | } |
| 1623 | PyTuple_SET_ITEM(ittuple, i, it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1624 | } |
| 1625 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1626 | /* create chainobject structure */ |
| 1627 | lz = (chainobject *)type->tp_alloc(type, 0); |
Raymond Hettinger | 7d98fb9 | 2003-06-17 23:14:40 +0000 | [diff] [blame] | 1628 | if (lz == NULL) { |
| 1629 | Py_DECREF(ittuple); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1630 | return NULL; |
Raymond Hettinger | 7d98fb9 | 2003-06-17 23:14:40 +0000 | [diff] [blame] | 1631 | } |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1632 | |
| 1633 | lz->ittuple = ittuple; |
| 1634 | lz->iternum = 0; |
| 1635 | lz->tuplesize = tuplesize; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1636 | |
| 1637 | return (PyObject *)lz; |
| 1638 | } |
| 1639 | |
| 1640 | static void |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1641 | chain_dealloc(chainobject *lz) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1642 | { |
| 1643 | PyObject_GC_UnTrack(lz); |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1644 | Py_XDECREF(lz->ittuple); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1645 | lz->ob_type->tp_free(lz); |
| 1646 | } |
| 1647 | |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1648 | static int |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1649 | chain_traverse(chainobject *lz, visitproc visit, void *arg) |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1650 | { |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1651 | if (lz->ittuple) |
| 1652 | return visit(lz->ittuple, arg); |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1653 | return 0; |
| 1654 | } |
| 1655 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1656 | static PyObject * |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1657 | chain_next(chainobject *lz) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1658 | { |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1659 | PyObject *it; |
| 1660 | PyObject *item; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1661 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1662 | while (lz->iternum < lz->tuplesize) { |
| 1663 | it = PyTuple_GET_ITEM(lz->ittuple, lz->iternum); |
| 1664 | item = PyIter_Next(it); |
| 1665 | if (item != NULL) |
| 1666 | return item; |
Raymond Hettinger | 9d7c870 | 2004-05-08 19:49:42 +0000 | [diff] [blame] | 1667 | if (PyErr_Occurred()) { |
| 1668 | if (PyErr_ExceptionMatches(PyExc_StopIteration)) |
| 1669 | PyErr_Clear(); |
| 1670 | else |
| 1671 | return NULL; |
| 1672 | } |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1673 | lz->iternum++; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1674 | } |
| 1675 | return NULL; |
| 1676 | } |
| 1677 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1678 | PyDoc_STRVAR(chain_doc, |
| 1679 | "chain(*iterables) --> chain object\n\ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1680 | \n\ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1681 | Return a chain object whose .next() method returns elements from the\n\ |
| 1682 | first iterable until it is exhausted, then elements from the next\n\ |
| 1683 | iterable, until all of the iterables are exhausted."); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1684 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1685 | static PyTypeObject chain_type = { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1686 | PyObject_HEAD_INIT(NULL) |
| 1687 | 0, /* ob_size */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1688 | "itertools.chain", /* tp_name */ |
| 1689 | sizeof(chainobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1690 | 0, /* tp_itemsize */ |
| 1691 | /* methods */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1692 | (destructor)chain_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1693 | 0, /* tp_print */ |
| 1694 | 0, /* tp_getattr */ |
| 1695 | 0, /* tp_setattr */ |
| 1696 | 0, /* tp_compare */ |
| 1697 | 0, /* tp_repr */ |
| 1698 | 0, /* tp_as_number */ |
| 1699 | 0, /* tp_as_sequence */ |
| 1700 | 0, /* tp_as_mapping */ |
| 1701 | 0, /* tp_hash */ |
| 1702 | 0, /* tp_call */ |
| 1703 | 0, /* tp_str */ |
| 1704 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 1705 | 0, /* tp_setattro */ |
| 1706 | 0, /* tp_as_buffer */ |
| 1707 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 1708 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1709 | chain_doc, /* tp_doc */ |
| 1710 | (traverseproc)chain_traverse, /* tp_traverse */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1711 | 0, /* tp_clear */ |
| 1712 | 0, /* tp_richcompare */ |
| 1713 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 1714 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1715 | (iternextfunc)chain_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1716 | 0, /* tp_methods */ |
| 1717 | 0, /* tp_members */ |
| 1718 | 0, /* tp_getset */ |
| 1719 | 0, /* tp_base */ |
| 1720 | 0, /* tp_dict */ |
| 1721 | 0, /* tp_descr_get */ |
| 1722 | 0, /* tp_descr_set */ |
| 1723 | 0, /* tp_dictoffset */ |
| 1724 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 1725 | 0, /* tp_alloc */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1726 | chain_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1727 | PyObject_GC_Del, /* tp_free */ |
| 1728 | }; |
| 1729 | |
| 1730 | |
| 1731 | /* ifilter object ************************************************************/ |
| 1732 | |
| 1733 | typedef struct { |
| 1734 | PyObject_HEAD |
| 1735 | PyObject *func; |
| 1736 | PyObject *it; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1737 | } ifilterobject; |
| 1738 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1739 | static PyTypeObject ifilter_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1740 | |
| 1741 | static PyObject * |
| 1742 | ifilter_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 1743 | { |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1744 | PyObject *func, *seq; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1745 | PyObject *it; |
| 1746 | ifilterobject *lz; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1747 | |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1748 | if (!PyArg_UnpackTuple(args, "ifilter", 2, 2, &func, &seq)) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1749 | return NULL; |
| 1750 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1751 | /* Get iterator. */ |
| 1752 | it = PyObject_GetIter(seq); |
| 1753 | if (it == NULL) |
| 1754 | return NULL; |
| 1755 | |
| 1756 | /* create ifilterobject structure */ |
| 1757 | lz = (ifilterobject *)type->tp_alloc(type, 0); |
| 1758 | if (lz == NULL) { |
| 1759 | Py_DECREF(it); |
| 1760 | return NULL; |
| 1761 | } |
| 1762 | Py_INCREF(func); |
| 1763 | lz->func = func; |
| 1764 | lz->it = it; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1765 | |
| 1766 | return (PyObject *)lz; |
| 1767 | } |
| 1768 | |
| 1769 | static void |
| 1770 | ifilter_dealloc(ifilterobject *lz) |
| 1771 | { |
| 1772 | PyObject_GC_UnTrack(lz); |
| 1773 | Py_XDECREF(lz->func); |
| 1774 | Py_XDECREF(lz->it); |
| 1775 | lz->ob_type->tp_free(lz); |
| 1776 | } |
| 1777 | |
| 1778 | static int |
| 1779 | ifilter_traverse(ifilterobject *lz, visitproc visit, void *arg) |
| 1780 | { |
| 1781 | int err; |
| 1782 | |
| 1783 | if (lz->it) { |
| 1784 | err = visit(lz->it, arg); |
| 1785 | if (err) |
| 1786 | return err; |
| 1787 | } |
| 1788 | if (lz->func) { |
| 1789 | err = visit(lz->func, arg); |
| 1790 | if (err) |
| 1791 | return err; |
| 1792 | } |
| 1793 | return 0; |
| 1794 | } |
| 1795 | |
| 1796 | static PyObject * |
| 1797 | ifilter_next(ifilterobject *lz) |
| 1798 | { |
| 1799 | PyObject *item; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 1800 | PyObject *it = lz->it; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1801 | long ok; |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1802 | PyObject *(*iternext)(PyObject *); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1803 | |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1804 | assert(PyIter_Check(it)); |
| 1805 | iternext = *it->ob_type->tp_iternext; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1806 | for (;;) { |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1807 | item = iternext(it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1808 | if (item == NULL) |
| 1809 | return NULL; |
| 1810 | |
| 1811 | if (lz->func == Py_None) { |
| 1812 | ok = PyObject_IsTrue(item); |
| 1813 | } else { |
| 1814 | PyObject *good; |
| 1815 | good = PyObject_CallFunctionObjArgs(lz->func, |
| 1816 | item, NULL); |
| 1817 | if (good == NULL) { |
| 1818 | Py_DECREF(item); |
| 1819 | return NULL; |
| 1820 | } |
| 1821 | ok = PyObject_IsTrue(good); |
| 1822 | Py_DECREF(good); |
| 1823 | } |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1824 | if (ok) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1825 | return item; |
| 1826 | Py_DECREF(item); |
| 1827 | } |
| 1828 | } |
| 1829 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1830 | PyDoc_STRVAR(ifilter_doc, |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1831 | "ifilter(function or None, sequence) --> ifilter object\n\ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1832 | \n\ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1833 | Return those items of sequence for which function(item) is true.\n\ |
| 1834 | If function is None, return the items that are true."); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1835 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1836 | static PyTypeObject ifilter_type = { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1837 | PyObject_HEAD_INIT(NULL) |
| 1838 | 0, /* ob_size */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1839 | "itertools.ifilter", /* tp_name */ |
| 1840 | sizeof(ifilterobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1841 | 0, /* tp_itemsize */ |
| 1842 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1843 | (destructor)ifilter_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1844 | 0, /* tp_print */ |
| 1845 | 0, /* tp_getattr */ |
| 1846 | 0, /* tp_setattr */ |
| 1847 | 0, /* tp_compare */ |
| 1848 | 0, /* tp_repr */ |
| 1849 | 0, /* tp_as_number */ |
| 1850 | 0, /* tp_as_sequence */ |
| 1851 | 0, /* tp_as_mapping */ |
| 1852 | 0, /* tp_hash */ |
| 1853 | 0, /* tp_call */ |
| 1854 | 0, /* tp_str */ |
| 1855 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 1856 | 0, /* tp_setattro */ |
| 1857 | 0, /* tp_as_buffer */ |
| 1858 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 1859 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1860 | ifilter_doc, /* tp_doc */ |
| 1861 | (traverseproc)ifilter_traverse, /* tp_traverse */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1862 | 0, /* tp_clear */ |
| 1863 | 0, /* tp_richcompare */ |
| 1864 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 1865 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1866 | (iternextfunc)ifilter_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1867 | 0, /* tp_methods */ |
| 1868 | 0, /* tp_members */ |
| 1869 | 0, /* tp_getset */ |
| 1870 | 0, /* tp_base */ |
| 1871 | 0, /* tp_dict */ |
| 1872 | 0, /* tp_descr_get */ |
| 1873 | 0, /* tp_descr_set */ |
| 1874 | 0, /* tp_dictoffset */ |
| 1875 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 1876 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1877 | ifilter_new, /* tp_new */ |
| 1878 | PyObject_GC_Del, /* tp_free */ |
| 1879 | }; |
| 1880 | |
| 1881 | |
| 1882 | /* ifilterfalse object ************************************************************/ |
| 1883 | |
| 1884 | typedef struct { |
| 1885 | PyObject_HEAD |
| 1886 | PyObject *func; |
| 1887 | PyObject *it; |
| 1888 | } ifilterfalseobject; |
| 1889 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1890 | static PyTypeObject ifilterfalse_type; |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1891 | |
| 1892 | static PyObject * |
| 1893 | ifilterfalse_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 1894 | { |
Guido van Rossum | d58f3fc | 2003-02-09 17:19:18 +0000 | [diff] [blame] | 1895 | PyObject *func, *seq; |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1896 | PyObject *it; |
| 1897 | ifilterfalseobject *lz; |
| 1898 | |
| 1899 | if (!PyArg_UnpackTuple(args, "ifilterfalse", 2, 2, &func, &seq)) |
| 1900 | return NULL; |
| 1901 | |
| 1902 | /* Get iterator. */ |
| 1903 | it = PyObject_GetIter(seq); |
| 1904 | if (it == NULL) |
| 1905 | return NULL; |
| 1906 | |
| 1907 | /* create ifilterfalseobject structure */ |
| 1908 | lz = (ifilterfalseobject *)type->tp_alloc(type, 0); |
| 1909 | if (lz == NULL) { |
| 1910 | Py_DECREF(it); |
| 1911 | return NULL; |
| 1912 | } |
| 1913 | Py_INCREF(func); |
| 1914 | lz->func = func; |
| 1915 | lz->it = it; |
| 1916 | |
| 1917 | return (PyObject *)lz; |
| 1918 | } |
| 1919 | |
| 1920 | static void |
| 1921 | ifilterfalse_dealloc(ifilterfalseobject *lz) |
| 1922 | { |
| 1923 | PyObject_GC_UnTrack(lz); |
| 1924 | Py_XDECREF(lz->func); |
| 1925 | Py_XDECREF(lz->it); |
| 1926 | lz->ob_type->tp_free(lz); |
| 1927 | } |
| 1928 | |
| 1929 | static int |
| 1930 | ifilterfalse_traverse(ifilterfalseobject *lz, visitproc visit, void *arg) |
| 1931 | { |
| 1932 | int err; |
| 1933 | |
| 1934 | if (lz->it) { |
| 1935 | err = visit(lz->it, arg); |
| 1936 | if (err) |
| 1937 | return err; |
| 1938 | } |
| 1939 | if (lz->func) { |
| 1940 | err = visit(lz->func, arg); |
| 1941 | if (err) |
| 1942 | return err; |
| 1943 | } |
| 1944 | return 0; |
| 1945 | } |
| 1946 | |
| 1947 | static PyObject * |
| 1948 | ifilterfalse_next(ifilterfalseobject *lz) |
| 1949 | { |
| 1950 | PyObject *item; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 1951 | PyObject *it = lz->it; |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1952 | long ok; |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1953 | PyObject *(*iternext)(PyObject *); |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1954 | |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1955 | assert(PyIter_Check(it)); |
| 1956 | iternext = *it->ob_type->tp_iternext; |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1957 | for (;;) { |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1958 | item = iternext(it); |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1959 | if (item == NULL) |
| 1960 | return NULL; |
| 1961 | |
| 1962 | if (lz->func == Py_None) { |
| 1963 | ok = PyObject_IsTrue(item); |
| 1964 | } else { |
| 1965 | PyObject *good; |
| 1966 | good = PyObject_CallFunctionObjArgs(lz->func, |
| 1967 | item, NULL); |
| 1968 | if (good == NULL) { |
| 1969 | Py_DECREF(item); |
| 1970 | return NULL; |
| 1971 | } |
| 1972 | ok = PyObject_IsTrue(good); |
| 1973 | Py_DECREF(good); |
| 1974 | } |
| 1975 | if (!ok) |
| 1976 | return item; |
| 1977 | Py_DECREF(item); |
| 1978 | } |
| 1979 | } |
| 1980 | |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1981 | PyDoc_STRVAR(ifilterfalse_doc, |
| 1982 | "ifilterfalse(function or None, sequence) --> ifilterfalse object\n\ |
| 1983 | \n\ |
| 1984 | Return those items of sequence for which function(item) is false.\n\ |
| 1985 | If function is None, return the items that are false."); |
| 1986 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1987 | static PyTypeObject ifilterfalse_type = { |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1988 | PyObject_HEAD_INIT(NULL) |
| 1989 | 0, /* ob_size */ |
| 1990 | "itertools.ifilterfalse", /* tp_name */ |
| 1991 | sizeof(ifilterfalseobject), /* tp_basicsize */ |
| 1992 | 0, /* tp_itemsize */ |
| 1993 | /* methods */ |
| 1994 | (destructor)ifilterfalse_dealloc, /* tp_dealloc */ |
| 1995 | 0, /* tp_print */ |
| 1996 | 0, /* tp_getattr */ |
| 1997 | 0, /* tp_setattr */ |
| 1998 | 0, /* tp_compare */ |
| 1999 | 0, /* tp_repr */ |
| 2000 | 0, /* tp_as_number */ |
| 2001 | 0, /* tp_as_sequence */ |
| 2002 | 0, /* tp_as_mapping */ |
| 2003 | 0, /* tp_hash */ |
| 2004 | 0, /* tp_call */ |
| 2005 | 0, /* tp_str */ |
| 2006 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 2007 | 0, /* tp_setattro */ |
| 2008 | 0, /* tp_as_buffer */ |
| 2009 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 2010 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| 2011 | ifilterfalse_doc, /* tp_doc */ |
| 2012 | (traverseproc)ifilterfalse_traverse, /* tp_traverse */ |
| 2013 | 0, /* tp_clear */ |
| 2014 | 0, /* tp_richcompare */ |
| 2015 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 2016 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2017 | (iternextfunc)ifilterfalse_next, /* tp_iternext */ |
| 2018 | 0, /* tp_methods */ |
| 2019 | 0, /* tp_members */ |
| 2020 | 0, /* tp_getset */ |
| 2021 | 0, /* tp_base */ |
| 2022 | 0, /* tp_dict */ |
| 2023 | 0, /* tp_descr_get */ |
| 2024 | 0, /* tp_descr_set */ |
| 2025 | 0, /* tp_dictoffset */ |
| 2026 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 2027 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2028 | ifilterfalse_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2029 | PyObject_GC_Del, /* tp_free */ |
| 2030 | }; |
| 2031 | |
| 2032 | |
| 2033 | /* count object ************************************************************/ |
| 2034 | |
| 2035 | typedef struct { |
| 2036 | PyObject_HEAD |
| 2037 | long cnt; |
| 2038 | } countobject; |
| 2039 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2040 | static PyTypeObject count_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2041 | |
| 2042 | static PyObject * |
| 2043 | count_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 2044 | { |
| 2045 | countobject *lz; |
| 2046 | long cnt = 0; |
| 2047 | |
| 2048 | if (!PyArg_ParseTuple(args, "|l:count", &cnt)) |
| 2049 | return NULL; |
| 2050 | |
| 2051 | /* create countobject structure */ |
| 2052 | lz = (countobject *)PyObject_New(countobject, &count_type); |
| 2053 | if (lz == NULL) |
| 2054 | return NULL; |
| 2055 | lz->cnt = cnt; |
| 2056 | |
| 2057 | return (PyObject *)lz; |
| 2058 | } |
| 2059 | |
| 2060 | static PyObject * |
| 2061 | count_next(countobject *lz) |
| 2062 | { |
| 2063 | return PyInt_FromLong(lz->cnt++); |
| 2064 | } |
| 2065 | |
Raymond Hettinger | 7dacda2 | 2004-04-08 21:54:00 +0000 | [diff] [blame] | 2066 | static PyObject * |
| 2067 | count_repr(countobject *lz) |
| 2068 | { |
Brett Cannon | 0046839 | 2004-04-13 02:43:53 +0000 | [diff] [blame] | 2069 | return PyString_FromFormat("count(%ld)", lz->cnt); |
Raymond Hettinger | 7dacda2 | 2004-04-08 21:54:00 +0000 | [diff] [blame] | 2070 | } |
| 2071 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2072 | PyDoc_STRVAR(count_doc, |
| 2073 | "count([firstval]) --> count object\n\ |
| 2074 | \n\ |
| 2075 | Return a count object whose .next() method returns consecutive\n\ |
| 2076 | integers starting from zero or, if specified, from firstval."); |
| 2077 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2078 | static PyTypeObject count_type = { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2079 | PyObject_HEAD_INIT(NULL) |
| 2080 | 0, /* ob_size */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2081 | "itertools.count", /* tp_name */ |
| 2082 | sizeof(countobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2083 | 0, /* tp_itemsize */ |
| 2084 | /* methods */ |
| 2085 | (destructor)PyObject_Del, /* tp_dealloc */ |
| 2086 | 0, /* tp_print */ |
| 2087 | 0, /* tp_getattr */ |
| 2088 | 0, /* tp_setattr */ |
| 2089 | 0, /* tp_compare */ |
Raymond Hettinger | 7dacda2 | 2004-04-08 21:54:00 +0000 | [diff] [blame] | 2090 | (reprfunc)count_repr, /* tp_repr */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2091 | 0, /* tp_as_number */ |
| 2092 | 0, /* tp_as_sequence */ |
| 2093 | 0, /* tp_as_mapping */ |
| 2094 | 0, /* tp_hash */ |
| 2095 | 0, /* tp_call */ |
| 2096 | 0, /* tp_str */ |
| 2097 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 2098 | 0, /* tp_setattro */ |
| 2099 | 0, /* tp_as_buffer */ |
| 2100 | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2101 | count_doc, /* tp_doc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2102 | 0, /* tp_traverse */ |
| 2103 | 0, /* tp_clear */ |
| 2104 | 0, /* tp_richcompare */ |
| 2105 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 2106 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2107 | (iternextfunc)count_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2108 | 0, /* tp_methods */ |
| 2109 | 0, /* tp_members */ |
| 2110 | 0, /* tp_getset */ |
| 2111 | 0, /* tp_base */ |
| 2112 | 0, /* tp_dict */ |
| 2113 | 0, /* tp_descr_get */ |
| 2114 | 0, /* tp_descr_set */ |
| 2115 | 0, /* tp_dictoffset */ |
| 2116 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 2117 | 0, /* tp_alloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2118 | count_new, /* tp_new */ |
| 2119 | }; |
| 2120 | |
| 2121 | |
| 2122 | /* izip object ************************************************************/ |
| 2123 | |
| 2124 | #include "Python.h" |
| 2125 | |
| 2126 | typedef struct { |
| 2127 | PyObject_HEAD |
| 2128 | long tuplesize; |
| 2129 | PyObject *ittuple; /* tuple of iterators */ |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2130 | PyObject *result; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2131 | } izipobject; |
| 2132 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2133 | static PyTypeObject izip_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2134 | |
| 2135 | static PyObject * |
| 2136 | izip_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 2137 | { |
| 2138 | izipobject *lz; |
| 2139 | int i; |
| 2140 | PyObject *ittuple; /* tuple of iterators */ |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2141 | PyObject *result; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2142 | int tuplesize = PySequence_Length(args); |
| 2143 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2144 | /* args must be a tuple */ |
| 2145 | assert(PyTuple_Check(args)); |
| 2146 | |
| 2147 | /* obtain iterators */ |
| 2148 | ittuple = PyTuple_New(tuplesize); |
| 2149 | if(ittuple == NULL) |
| 2150 | return NULL; |
| 2151 | for (i=0; i < tuplesize; ++i) { |
| 2152 | PyObject *item = PyTuple_GET_ITEM(args, i); |
| 2153 | PyObject *it = PyObject_GetIter(item); |
| 2154 | if (it == NULL) { |
| 2155 | if (PyErr_ExceptionMatches(PyExc_TypeError)) |
| 2156 | PyErr_Format(PyExc_TypeError, |
| 2157 | "izip argument #%d must support iteration", |
| 2158 | i+1); |
| 2159 | Py_DECREF(ittuple); |
| 2160 | return NULL; |
| 2161 | } |
| 2162 | PyTuple_SET_ITEM(ittuple, i, it); |
| 2163 | } |
| 2164 | |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2165 | /* create a result holder */ |
| 2166 | result = PyTuple_New(tuplesize); |
| 2167 | if (result == NULL) { |
| 2168 | Py_DECREF(ittuple); |
| 2169 | return NULL; |
| 2170 | } |
| 2171 | for (i=0 ; i < tuplesize ; i++) { |
| 2172 | Py_INCREF(Py_None); |
| 2173 | PyTuple_SET_ITEM(result, i, Py_None); |
| 2174 | } |
| 2175 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2176 | /* create izipobject structure */ |
| 2177 | lz = (izipobject *)type->tp_alloc(type, 0); |
| 2178 | if (lz == NULL) { |
| 2179 | Py_DECREF(ittuple); |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2180 | Py_DECREF(result); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2181 | return NULL; |
| 2182 | } |
| 2183 | lz->ittuple = ittuple; |
| 2184 | lz->tuplesize = tuplesize; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2185 | lz->result = result; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2186 | |
| 2187 | return (PyObject *)lz; |
| 2188 | } |
| 2189 | |
| 2190 | static void |
| 2191 | izip_dealloc(izipobject *lz) |
| 2192 | { |
| 2193 | PyObject_GC_UnTrack(lz); |
| 2194 | Py_XDECREF(lz->ittuple); |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2195 | Py_XDECREF(lz->result); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2196 | lz->ob_type->tp_free(lz); |
| 2197 | } |
| 2198 | |
| 2199 | static int |
| 2200 | izip_traverse(izipobject *lz, visitproc visit, void *arg) |
| 2201 | { |
Raymond Hettinger | befa37d | 2003-06-18 19:25:37 +0000 | [diff] [blame] | 2202 | int err; |
| 2203 | |
| 2204 | if (lz->ittuple) { |
| 2205 | err = visit(lz->ittuple, arg); |
| 2206 | if (err) |
| 2207 | return err; |
| 2208 | } |
| 2209 | if (lz->result) { |
| 2210 | err = visit(lz->result, arg); |
| 2211 | if (err) |
| 2212 | return err; |
| 2213 | } |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2214 | return 0; |
| 2215 | } |
| 2216 | |
| 2217 | static PyObject * |
| 2218 | izip_next(izipobject *lz) |
| 2219 | { |
| 2220 | int i; |
| 2221 | long tuplesize = lz->tuplesize; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2222 | PyObject *result = lz->result; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2223 | PyObject *it; |
| 2224 | PyObject *item; |
Raymond Hettinger | 4f01f89 | 2003-08-30 00:10:06 +0000 | [diff] [blame] | 2225 | PyObject *olditem; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2226 | |
Raymond Hettinger | b5a4208 | 2003-08-08 05:10:41 +0000 | [diff] [blame] | 2227 | if (tuplesize == 0) |
| 2228 | return NULL; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2229 | if (result->ob_refcnt == 1) { |
Raymond Hettinger | a56f6b6 | 2003-08-29 23:09:58 +0000 | [diff] [blame] | 2230 | Py_INCREF(result); |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2231 | for (i=0 ; i < tuplesize ; i++) { |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 2232 | it = PyTuple_GET_ITEM(lz->ittuple, i); |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 2233 | assert(PyIter_Check(it)); |
| 2234 | item = (*it->ob_type->tp_iternext)(it); |
Raymond Hettinger | a56f6b6 | 2003-08-29 23:09:58 +0000 | [diff] [blame] | 2235 | if (item == NULL) { |
| 2236 | Py_DECREF(result); |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 2237 | return NULL; |
Raymond Hettinger | a56f6b6 | 2003-08-29 23:09:58 +0000 | [diff] [blame] | 2238 | } |
Raymond Hettinger | 4f01f89 | 2003-08-30 00:10:06 +0000 | [diff] [blame] | 2239 | olditem = PyTuple_GET_ITEM(result, i); |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 2240 | PyTuple_SET_ITEM(result, i, item); |
Raymond Hettinger | 4f01f89 | 2003-08-30 00:10:06 +0000 | [diff] [blame] | 2241 | Py_DECREF(olditem); |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2242 | } |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2243 | } else { |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2244 | result = PyTuple_New(tuplesize); |
| 2245 | if (result == NULL) |
| 2246 | return NULL; |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 2247 | for (i=0 ; i < tuplesize ; i++) { |
| 2248 | it = PyTuple_GET_ITEM(lz->ittuple, i); |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 2249 | assert(PyIter_Check(it)); |
| 2250 | item = (*it->ob_type->tp_iternext)(it); |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 2251 | if (item == NULL) { |
| 2252 | Py_DECREF(result); |
| 2253 | return NULL; |
| 2254 | } |
| 2255 | PyTuple_SET_ITEM(result, i, item); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2256 | } |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2257 | } |
| 2258 | return result; |
| 2259 | } |
| 2260 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2261 | PyDoc_STRVAR(izip_doc, |
| 2262 | "izip(iter1 [,iter2 [...]]) --> izip object\n\ |
| 2263 | \n\ |
| 2264 | Return a izip object whose .next() method returns a tuple where\n\ |
| 2265 | the i-th element comes from the i-th iterable argument. The .next()\n\ |
| 2266 | method continues until the shortest iterable in the argument sequence\n\ |
| 2267 | is exhausted and then it raises StopIteration. Works like the zip()\n\ |
| 2268 | function but consumes less memory by returning an iterator instead of\n\ |
| 2269 | a list."); |
| 2270 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2271 | static PyTypeObject izip_type = { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2272 | PyObject_HEAD_INIT(NULL) |
| 2273 | 0, /* ob_size */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2274 | "itertools.izip", /* tp_name */ |
| 2275 | sizeof(izipobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2276 | 0, /* tp_itemsize */ |
| 2277 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2278 | (destructor)izip_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2279 | 0, /* tp_print */ |
| 2280 | 0, /* tp_getattr */ |
| 2281 | 0, /* tp_setattr */ |
| 2282 | 0, /* tp_compare */ |
| 2283 | 0, /* tp_repr */ |
| 2284 | 0, /* tp_as_number */ |
| 2285 | 0, /* tp_as_sequence */ |
| 2286 | 0, /* tp_as_mapping */ |
| 2287 | 0, /* tp_hash */ |
| 2288 | 0, /* tp_call */ |
| 2289 | 0, /* tp_str */ |
| 2290 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 2291 | 0, /* tp_setattro */ |
| 2292 | 0, /* tp_as_buffer */ |
| 2293 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 2294 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2295 | izip_doc, /* tp_doc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2296 | (traverseproc)izip_traverse, /* tp_traverse */ |
| 2297 | 0, /* tp_clear */ |
| 2298 | 0, /* tp_richcompare */ |
| 2299 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 2300 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2301 | (iternextfunc)izip_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2302 | 0, /* tp_methods */ |
| 2303 | 0, /* tp_members */ |
| 2304 | 0, /* tp_getset */ |
| 2305 | 0, /* tp_base */ |
| 2306 | 0, /* tp_dict */ |
| 2307 | 0, /* tp_descr_get */ |
| 2308 | 0, /* tp_descr_set */ |
| 2309 | 0, /* tp_dictoffset */ |
| 2310 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 2311 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2312 | izip_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2313 | PyObject_GC_Del, /* tp_free */ |
| 2314 | }; |
| 2315 | |
| 2316 | |
| 2317 | /* repeat object ************************************************************/ |
| 2318 | |
| 2319 | typedef struct { |
| 2320 | PyObject_HEAD |
| 2321 | PyObject *element; |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2322 | long cnt; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2323 | } repeatobject; |
| 2324 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2325 | static PyTypeObject repeat_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2326 | |
| 2327 | static PyObject * |
| 2328 | repeat_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 2329 | { |
| 2330 | repeatobject *ro; |
| 2331 | PyObject *element; |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2332 | long cnt = -1; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2333 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2334 | if (!PyArg_ParseTuple(args, "O|l:repeat", &element, &cnt)) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2335 | return NULL; |
| 2336 | |
Raymond Hettinger | 7c2bb5b | 2003-05-03 05:59:48 +0000 | [diff] [blame] | 2337 | if (PyTuple_Size(args) == 2 && cnt < 0) |
| 2338 | cnt = 0; |
| 2339 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2340 | ro = (repeatobject *)type->tp_alloc(type, 0); |
| 2341 | if (ro == NULL) |
| 2342 | return NULL; |
| 2343 | Py_INCREF(element); |
| 2344 | ro->element = element; |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2345 | ro->cnt = cnt; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2346 | return (PyObject *)ro; |
| 2347 | } |
| 2348 | |
| 2349 | static void |
| 2350 | repeat_dealloc(repeatobject *ro) |
| 2351 | { |
| 2352 | PyObject_GC_UnTrack(ro); |
| 2353 | Py_XDECREF(ro->element); |
| 2354 | ro->ob_type->tp_free(ro); |
| 2355 | } |
| 2356 | |
| 2357 | static int |
| 2358 | repeat_traverse(repeatobject *ro, visitproc visit, void *arg) |
| 2359 | { |
| 2360 | if (ro->element) |
| 2361 | return visit(ro->element, arg); |
| 2362 | return 0; |
| 2363 | } |
| 2364 | |
| 2365 | static PyObject * |
| 2366 | repeat_next(repeatobject *ro) |
| 2367 | { |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2368 | if (ro->cnt == 0) |
| 2369 | return NULL; |
| 2370 | if (ro->cnt > 0) |
| 2371 | ro->cnt--; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2372 | Py_INCREF(ro->element); |
| 2373 | return ro->element; |
| 2374 | } |
| 2375 | |
Raymond Hettinger | 7dacda2 | 2004-04-08 21:54:00 +0000 | [diff] [blame] | 2376 | static PyObject * |
| 2377 | repeat_repr(repeatobject *ro) |
| 2378 | { |
| 2379 | PyObject *result, *objrepr; |
| 2380 | |
| 2381 | objrepr = PyObject_Repr(ro->element); |
| 2382 | if (objrepr == NULL) |
| 2383 | return NULL; |
| 2384 | |
| 2385 | if (ro->cnt == -1) |
| 2386 | result = PyString_FromFormat("repeat(%s)", |
| 2387 | PyString_AS_STRING(objrepr)); |
| 2388 | else |
Brett Cannon | 0046839 | 2004-04-13 02:43:53 +0000 | [diff] [blame] | 2389 | result = PyString_FromFormat("repeat(%s, %ld)", |
Raymond Hettinger | 7dacda2 | 2004-04-08 21:54:00 +0000 | [diff] [blame] | 2390 | PyString_AS_STRING(objrepr), ro->cnt); |
| 2391 | Py_DECREF(objrepr); |
| 2392 | return result; |
| 2393 | } |
| 2394 | |
Raymond Hettinger | 5cab2e3 | 2004-02-10 09:25:40 +0000 | [diff] [blame] | 2395 | static int |
| 2396 | repeat_len(repeatobject *ro) |
| 2397 | { |
| 2398 | if (ro->cnt == -1) |
| 2399 | PyErr_SetString(PyExc_TypeError, "len() of unsized object"); |
| 2400 | return (int)(ro->cnt); |
| 2401 | } |
| 2402 | |
| 2403 | static PySequenceMethods repeat_as_sequence = { |
| 2404 | (inquiry)repeat_len, /* sq_length */ |
| 2405 | 0, /* sq_concat */ |
| 2406 | }; |
| 2407 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2408 | PyDoc_STRVAR(repeat_doc, |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2409 | "repeat(element [,times]) -> create an iterator which returns the element\n\ |
| 2410 | for the specified number of times. If not specified, returns the element\n\ |
| 2411 | endlessly."); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2412 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2413 | static PyTypeObject repeat_type = { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2414 | PyObject_HEAD_INIT(NULL) |
| 2415 | 0, /* ob_size */ |
| 2416 | "itertools.repeat", /* tp_name */ |
| 2417 | sizeof(repeatobject), /* tp_basicsize */ |
| 2418 | 0, /* tp_itemsize */ |
| 2419 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2420 | (destructor)repeat_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2421 | 0, /* tp_print */ |
| 2422 | 0, /* tp_getattr */ |
| 2423 | 0, /* tp_setattr */ |
| 2424 | 0, /* tp_compare */ |
Raymond Hettinger | 7dacda2 | 2004-04-08 21:54:00 +0000 | [diff] [blame] | 2425 | (reprfunc)repeat_repr, /* tp_repr */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2426 | 0, /* tp_as_number */ |
Raymond Hettinger | 5cab2e3 | 2004-02-10 09:25:40 +0000 | [diff] [blame] | 2427 | &repeat_as_sequence, /* tp_as_sequence */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2428 | 0, /* tp_as_mapping */ |
| 2429 | 0, /* tp_hash */ |
| 2430 | 0, /* tp_call */ |
| 2431 | 0, /* tp_str */ |
| 2432 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 2433 | 0, /* tp_setattro */ |
| 2434 | 0, /* tp_as_buffer */ |
| 2435 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 2436 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2437 | repeat_doc, /* tp_doc */ |
| 2438 | (traverseproc)repeat_traverse, /* tp_traverse */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2439 | 0, /* tp_clear */ |
| 2440 | 0, /* tp_richcompare */ |
| 2441 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 2442 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2443 | (iternextfunc)repeat_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2444 | 0, /* tp_methods */ |
| 2445 | 0, /* tp_members */ |
| 2446 | 0, /* tp_getset */ |
| 2447 | 0, /* tp_base */ |
| 2448 | 0, /* tp_dict */ |
| 2449 | 0, /* tp_descr_get */ |
| 2450 | 0, /* tp_descr_set */ |
| 2451 | 0, /* tp_dictoffset */ |
| 2452 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 2453 | 0, /* tp_alloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2454 | repeat_new, /* tp_new */ |
| 2455 | PyObject_GC_Del, /* tp_free */ |
| 2456 | }; |
| 2457 | |
| 2458 | |
| 2459 | /* module level code ********************************************************/ |
| 2460 | |
| 2461 | PyDoc_STRVAR(module_doc, |
| 2462 | "Functional tools for creating and using iterators.\n\ |
| 2463 | \n\ |
| 2464 | Infinite iterators:\n\ |
| 2465 | count([n]) --> n, n+1, n+2, ...\n\ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2466 | cycle(p) --> p0, p1, ... plast, p0, p1, ...\n\ |
Andrew M. Kuchling | dff694b | 2003-04-14 15:31:27 +0000 | [diff] [blame] | 2467 | repeat(elem [,n]) --> elem, elem, elem, ... endlessly or up to n times\n\ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2468 | \n\ |
| 2469 | Iterators terminating on the shortest input sequence:\n\ |
| 2470 | izip(p, q, ...) --> (p[0], q[0]), (p[1], q[1]), ... \n\ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2471 | ifilter(pred, seq) --> elements of seq where pred(elem) is True\n\ |
| 2472 | ifilterfalse(pred, seq) --> elements of seq where pred(elem) is False\n\ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2473 | islice(seq, [start,] stop [, step]) --> elements from\n\ |
| 2474 | seq[start:stop:step]\n\ |
| 2475 | imap(fun, p, q, ...) --> fun(p0, q0), fun(p1, q1), ...\n\ |
| 2476 | starmap(fun, seq) --> fun(*seq[0]), fun(*seq[1]), ...\n\ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 2477 | tee(it, n=2) --> (it1, it2 , ... itn) splits one iterator into n\n\ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2478 | chain(p, q, ...) --> p0, p1, ... plast, q0, q1, ... \n\ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2479 | takewhile(pred, seq) --> seq[0], seq[1], until pred fails\n\ |
| 2480 | dropwhile(pred, seq) --> seq[n], seq[n+1], starting when pred fails\n\ |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 2481 | groupby(iterable[, keyfunc]) --> sub-iterators grouped by value of keyfunc(v)\n\ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2482 | "); |
| 2483 | |
| 2484 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 2485 | static PyMethodDef module_methods[] = { |
| 2486 | {"tee", (PyCFunction)tee, METH_VARARGS, tee_doc}, |
| 2487 | {NULL, NULL} /* sentinel */ |
| 2488 | }; |
| 2489 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2490 | PyMODINIT_FUNC |
| 2491 | inititertools(void) |
| 2492 | { |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2493 | int i; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2494 | PyObject *m; |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2495 | char *name; |
| 2496 | PyTypeObject *typelist[] = { |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2497 | &cycle_type, |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2498 | &dropwhile_type, |
| 2499 | &takewhile_type, |
| 2500 | &islice_type, |
| 2501 | &starmap_type, |
| 2502 | &imap_type, |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2503 | &chain_type, |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2504 | &ifilter_type, |
| 2505 | &ifilterfalse_type, |
| 2506 | &count_type, |
| 2507 | &izip_type, |
| 2508 | &repeat_type, |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 2509 | &groupby_type, |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2510 | NULL |
| 2511 | }; |
| 2512 | |
Skip Montanaro | f3938fd | 2004-02-10 20:27:40 +0000 | [diff] [blame] | 2513 | teedataobject_type.ob_type = &PyType_Type; |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 2514 | m = Py_InitModule3("itertools", module_methods, module_doc); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2515 | |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2516 | for (i=0 ; typelist[i] != NULL ; i++) { |
| 2517 | if (PyType_Ready(typelist[i]) < 0) |
| 2518 | return; |
Raymond Hettinger | d449eab | 2003-05-22 16:32:58 +0000 | [diff] [blame] | 2519 | name = strchr(typelist[i]->tp_name, '.'); |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2520 | assert (name != NULL); |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2521 | Py_INCREF(typelist[i]); |
Raymond Hettinger | d449eab | 2003-05-22 16:32:58 +0000 | [diff] [blame] | 2522 | PyModule_AddObject(m, name+1, (PyObject *)typelist[i]); |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2523 | } |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 2524 | |
| 2525 | if (PyType_Ready(&teedataobject_type) < 0) |
| 2526 | return; |
| 2527 | if (PyType_Ready(&tee_type) < 0) |
| 2528 | return; |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 2529 | if (PyType_Ready(&_grouper_type) < 0) |
| 2530 | return; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2531 | } |