Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1 | |
| 2 | #include "Python.h" |
Fred Drake | 08ebfec | 2004-10-17 19:36:57 +0000 | [diff] [blame] | 3 | #include "structmember.h" |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 4 | |
| 5 | /* Itertools module written and maintained |
| 6 | by Raymond D. Hettinger <python@rcn.com> |
| 7 | Copyright (c) 2003 Python Software Foundation. |
| 8 | All rights reserved. |
| 9 | */ |
| 10 | |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 11 | |
| 12 | /* groupby object ***********************************************************/ |
| 13 | |
| 14 | typedef struct { |
| 15 | PyObject_HEAD |
| 16 | PyObject *it; |
| 17 | PyObject *keyfunc; |
| 18 | PyObject *tgtkey; |
| 19 | PyObject *currkey; |
| 20 | PyObject *currvalue; |
| 21 | } groupbyobject; |
| 22 | |
| 23 | static PyTypeObject groupby_type; |
| 24 | static PyObject *_grouper_create(groupbyobject *, PyObject *); |
| 25 | |
| 26 | static PyObject * |
| 27 | groupby_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 28 | { |
Martin v. Löwis | 02cbf4a | 2006-02-27 17:20:04 +0000 | [diff] [blame] | 29 | static char *kwargs[] = {"iterable", "key", NULL}; |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 30 | groupbyobject *gbo; |
| 31 | PyObject *it, *keyfunc = Py_None; |
| 32 | |
| 33 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O:groupby", kwargs, |
| 34 | &it, &keyfunc)) |
| 35 | return NULL; |
| 36 | |
| 37 | gbo = (groupbyobject *)type->tp_alloc(type, 0); |
| 38 | if (gbo == NULL) |
| 39 | return NULL; |
| 40 | gbo->tgtkey = NULL; |
| 41 | gbo->currkey = NULL; |
| 42 | gbo->currvalue = NULL; |
| 43 | gbo->keyfunc = keyfunc; |
| 44 | Py_INCREF(keyfunc); |
| 45 | gbo->it = PyObject_GetIter(it); |
| 46 | if (gbo->it == NULL) { |
| 47 | Py_DECREF(gbo); |
| 48 | return NULL; |
| 49 | } |
| 50 | return (PyObject *)gbo; |
| 51 | } |
| 52 | |
| 53 | static void |
| 54 | groupby_dealloc(groupbyobject *gbo) |
| 55 | { |
| 56 | PyObject_GC_UnTrack(gbo); |
| 57 | Py_XDECREF(gbo->it); |
| 58 | Py_XDECREF(gbo->keyfunc); |
| 59 | Py_XDECREF(gbo->tgtkey); |
| 60 | Py_XDECREF(gbo->currkey); |
| 61 | Py_XDECREF(gbo->currvalue); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 62 | Py_TYPE(gbo)->tp_free(gbo); |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | static int |
| 66 | groupby_traverse(groupbyobject *gbo, visitproc visit, void *arg) |
| 67 | { |
Raymond Hettinger | 58ed69b | 2004-07-15 05:32:47 +0000 | [diff] [blame] | 68 | Py_VISIT(gbo->it); |
| 69 | Py_VISIT(gbo->keyfunc); |
| 70 | Py_VISIT(gbo->tgtkey); |
| 71 | Py_VISIT(gbo->currkey); |
| 72 | Py_VISIT(gbo->currvalue); |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | static PyObject * |
| 77 | groupby_next(groupbyobject *gbo) |
| 78 | { |
Raymond Hettinger | 4cda01e | 2004-09-28 04:45:28 +0000 | [diff] [blame] | 79 | PyObject *newvalue, *newkey, *r, *grouper, *tmp; |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 80 | |
| 81 | /* skip to next iteration group */ |
| 82 | for (;;) { |
| 83 | if (gbo->currkey == NULL) |
| 84 | /* pass */; |
| 85 | else if (gbo->tgtkey == NULL) |
| 86 | break; |
| 87 | else { |
| 88 | int rcmp; |
| 89 | |
| 90 | rcmp = PyObject_RichCompareBool(gbo->tgtkey, |
| 91 | gbo->currkey, Py_EQ); |
| 92 | if (rcmp == -1) |
| 93 | return NULL; |
| 94 | else if (rcmp == 0) |
| 95 | break; |
| 96 | } |
| 97 | |
| 98 | newvalue = PyIter_Next(gbo->it); |
| 99 | if (newvalue == NULL) |
| 100 | return NULL; |
| 101 | |
| 102 | if (gbo->keyfunc == Py_None) { |
| 103 | newkey = newvalue; |
| 104 | Py_INCREF(newvalue); |
| 105 | } else { |
| 106 | newkey = PyObject_CallFunctionObjArgs(gbo->keyfunc, |
| 107 | newvalue, NULL); |
| 108 | if (newkey == NULL) { |
| 109 | Py_DECREF(newvalue); |
| 110 | return NULL; |
| 111 | } |
| 112 | } |
| 113 | |
Raymond Hettinger | 4cda01e | 2004-09-28 04:45:28 +0000 | [diff] [blame] | 114 | tmp = gbo->currkey; |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 115 | gbo->currkey = newkey; |
Raymond Hettinger | 4cda01e | 2004-09-28 04:45:28 +0000 | [diff] [blame] | 116 | Py_XDECREF(tmp); |
| 117 | |
| 118 | tmp = gbo->currvalue; |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 119 | gbo->currvalue = newvalue; |
Raymond Hettinger | 4cda01e | 2004-09-28 04:45:28 +0000 | [diff] [blame] | 120 | Py_XDECREF(tmp); |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 121 | } |
| 122 | |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 123 | Py_INCREF(gbo->currkey); |
Raymond Hettinger | 4cda01e | 2004-09-28 04:45:28 +0000 | [diff] [blame] | 124 | tmp = gbo->tgtkey; |
| 125 | gbo->tgtkey = gbo->currkey; |
| 126 | Py_XDECREF(tmp); |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 127 | |
| 128 | grouper = _grouper_create(gbo, gbo->tgtkey); |
| 129 | if (grouper == NULL) |
| 130 | return NULL; |
| 131 | |
| 132 | r = PyTuple_Pack(2, gbo->currkey, grouper); |
| 133 | Py_DECREF(grouper); |
| 134 | return r; |
| 135 | } |
| 136 | |
| 137 | PyDoc_STRVAR(groupby_doc, |
| 138 | "groupby(iterable[, keyfunc]) -> create an iterator which returns\n\ |
| 139 | (key, sub-iterator) grouped by each value of key(value).\n"); |
| 140 | |
| 141 | static PyTypeObject groupby_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 142 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 143 | "itertools.groupby", /* tp_name */ |
| 144 | sizeof(groupbyobject), /* tp_basicsize */ |
| 145 | 0, /* tp_itemsize */ |
| 146 | /* methods */ |
| 147 | (destructor)groupby_dealloc, /* tp_dealloc */ |
| 148 | 0, /* tp_print */ |
| 149 | 0, /* tp_getattr */ |
| 150 | 0, /* tp_setattr */ |
| 151 | 0, /* tp_compare */ |
| 152 | 0, /* tp_repr */ |
| 153 | 0, /* tp_as_number */ |
| 154 | 0, /* tp_as_sequence */ |
| 155 | 0, /* tp_as_mapping */ |
| 156 | 0, /* tp_hash */ |
| 157 | 0, /* tp_call */ |
| 158 | 0, /* tp_str */ |
| 159 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 160 | 0, /* tp_setattro */ |
| 161 | 0, /* tp_as_buffer */ |
| 162 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 163 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| 164 | groupby_doc, /* tp_doc */ |
| 165 | (traverseproc)groupby_traverse, /* tp_traverse */ |
| 166 | 0, /* tp_clear */ |
| 167 | 0, /* tp_richcompare */ |
| 168 | 0, /* tp_weaklistoffset */ |
| 169 | PyObject_SelfIter, /* tp_iter */ |
| 170 | (iternextfunc)groupby_next, /* tp_iternext */ |
| 171 | 0, /* tp_methods */ |
| 172 | 0, /* tp_members */ |
| 173 | 0, /* tp_getset */ |
| 174 | 0, /* tp_base */ |
| 175 | 0, /* tp_dict */ |
| 176 | 0, /* tp_descr_get */ |
| 177 | 0, /* tp_descr_set */ |
| 178 | 0, /* tp_dictoffset */ |
| 179 | 0, /* tp_init */ |
| 180 | 0, /* tp_alloc */ |
| 181 | groupby_new, /* tp_new */ |
| 182 | PyObject_GC_Del, /* tp_free */ |
| 183 | }; |
| 184 | |
| 185 | |
| 186 | /* _grouper object (internal) ************************************************/ |
| 187 | |
| 188 | typedef struct { |
| 189 | PyObject_HEAD |
| 190 | PyObject *parent; |
| 191 | PyObject *tgtkey; |
| 192 | } _grouperobject; |
| 193 | |
| 194 | static PyTypeObject _grouper_type; |
| 195 | |
| 196 | static PyObject * |
| 197 | _grouper_create(groupbyobject *parent, PyObject *tgtkey) |
| 198 | { |
| 199 | _grouperobject *igo; |
| 200 | |
| 201 | igo = PyObject_New(_grouperobject, &_grouper_type); |
| 202 | if (igo == NULL) |
| 203 | return NULL; |
| 204 | igo->parent = (PyObject *)parent; |
| 205 | Py_INCREF(parent); |
| 206 | igo->tgtkey = tgtkey; |
| 207 | Py_INCREF(tgtkey); |
| 208 | |
| 209 | return (PyObject *)igo; |
| 210 | } |
| 211 | |
| 212 | static void |
| 213 | _grouper_dealloc(_grouperobject *igo) |
| 214 | { |
| 215 | Py_DECREF(igo->parent); |
| 216 | Py_DECREF(igo->tgtkey); |
| 217 | PyObject_Del(igo); |
| 218 | } |
| 219 | |
| 220 | static PyObject * |
| 221 | _grouper_next(_grouperobject *igo) |
| 222 | { |
| 223 | groupbyobject *gbo = (groupbyobject *)igo->parent; |
| 224 | PyObject *newvalue, *newkey, *r; |
| 225 | int rcmp; |
| 226 | |
| 227 | if (gbo->currvalue == NULL) { |
| 228 | newvalue = PyIter_Next(gbo->it); |
| 229 | if (newvalue == NULL) |
| 230 | return NULL; |
| 231 | |
| 232 | if (gbo->keyfunc == Py_None) { |
| 233 | newkey = newvalue; |
| 234 | Py_INCREF(newvalue); |
| 235 | } else { |
| 236 | newkey = PyObject_CallFunctionObjArgs(gbo->keyfunc, |
| 237 | newvalue, NULL); |
| 238 | if (newkey == NULL) { |
| 239 | Py_DECREF(newvalue); |
| 240 | return NULL; |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | assert(gbo->currkey == NULL); |
| 245 | gbo->currkey = newkey; |
| 246 | gbo->currvalue = newvalue; |
| 247 | } |
| 248 | |
| 249 | assert(gbo->currkey != NULL); |
| 250 | rcmp = PyObject_RichCompareBool(igo->tgtkey, gbo->currkey, Py_EQ); |
| 251 | if (rcmp <= 0) |
| 252 | /* got any error or current group is end */ |
| 253 | return NULL; |
| 254 | |
| 255 | r = gbo->currvalue; |
| 256 | gbo->currvalue = NULL; |
Raymond Hettinger | 75ccea3 | 2004-09-01 07:02:44 +0000 | [diff] [blame] | 257 | Py_CLEAR(gbo->currkey); |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 258 | |
| 259 | return r; |
| 260 | } |
| 261 | |
| 262 | static PyTypeObject _grouper_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 263 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 264 | "itertools._grouper", /* tp_name */ |
| 265 | sizeof(_grouperobject), /* tp_basicsize */ |
| 266 | 0, /* tp_itemsize */ |
| 267 | /* methods */ |
| 268 | (destructor)_grouper_dealloc, /* tp_dealloc */ |
| 269 | 0, /* tp_print */ |
| 270 | 0, /* tp_getattr */ |
| 271 | 0, /* tp_setattr */ |
| 272 | 0, /* tp_compare */ |
| 273 | 0, /* tp_repr */ |
| 274 | 0, /* tp_as_number */ |
| 275 | 0, /* tp_as_sequence */ |
| 276 | 0, /* tp_as_mapping */ |
| 277 | 0, /* tp_hash */ |
| 278 | 0, /* tp_call */ |
| 279 | 0, /* tp_str */ |
| 280 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 281 | 0, /* tp_setattro */ |
| 282 | 0, /* tp_as_buffer */ |
| 283 | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
| 284 | 0, /* tp_doc */ |
| 285 | 0, /* tp_traverse */ |
| 286 | 0, /* tp_clear */ |
| 287 | 0, /* tp_richcompare */ |
| 288 | 0, /* tp_weaklistoffset */ |
| 289 | PyObject_SelfIter, /* tp_iter */ |
| 290 | (iternextfunc)_grouper_next, /* tp_iternext */ |
| 291 | 0, /* tp_methods */ |
| 292 | 0, /* tp_members */ |
| 293 | 0, /* tp_getset */ |
| 294 | 0, /* tp_base */ |
| 295 | 0, /* tp_dict */ |
| 296 | 0, /* tp_descr_get */ |
| 297 | 0, /* tp_descr_set */ |
| 298 | 0, /* tp_dictoffset */ |
| 299 | 0, /* tp_init */ |
| 300 | 0, /* tp_alloc */ |
| 301 | 0, /* tp_new */ |
| 302 | PyObject_Del, /* tp_free */ |
| 303 | }; |
| 304 | |
| 305 | |
| 306 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 307 | /* tee object and with supporting function and objects ***************/ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 308 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 309 | /* The teedataobject pre-allocates space for LINKCELLS number of objects. |
| 310 | To help the object fit neatly inside cache lines (space for 16 to 32 |
| 311 | pointers), the value should be a multiple of 16 minus space for |
| 312 | the other structure members including PyHEAD overhead. The larger the |
| 313 | value, the less memory overhead per object and the less time spent |
| 314 | allocating/deallocating new links. The smaller the number, the less |
| 315 | wasted space and the more rapid freeing of older data. |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 316 | */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 317 | #define LINKCELLS 57 |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 318 | |
| 319 | typedef struct { |
| 320 | PyObject_HEAD |
| 321 | PyObject *it; |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 322 | int numread; |
| 323 | PyObject *nextlink; |
| 324 | PyObject *(values[LINKCELLS]); |
| 325 | } teedataobject; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 326 | |
| 327 | typedef struct { |
| 328 | PyObject_HEAD |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 329 | teedataobject *dataobj; |
| 330 | int index; |
Raymond Hettinger | a9f6092 | 2004-10-17 16:40:14 +0000 | [diff] [blame] | 331 | PyObject *weakreflist; |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 332 | } teeobject; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 333 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 334 | static PyTypeObject teedataobject_type; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 335 | |
| 336 | static PyObject * |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 337 | teedataobject_new(PyObject *it) |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 338 | { |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 339 | teedataobject *tdo; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 340 | |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 341 | tdo = PyObject_GC_New(teedataobject, &teedataobject_type); |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 342 | if (tdo == NULL) |
Raymond Hettinger | 4514369 | 2003-10-25 06:37:47 +0000 | [diff] [blame] | 343 | return NULL; |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 344 | |
| 345 | tdo->numread = 0; |
| 346 | tdo->nextlink = NULL; |
| 347 | Py_INCREF(it); |
| 348 | tdo->it = it; |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 349 | PyObject_GC_Track(tdo); |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 350 | return (PyObject *)tdo; |
| 351 | } |
| 352 | |
| 353 | static PyObject * |
| 354 | teedataobject_jumplink(teedataobject *tdo) |
| 355 | { |
| 356 | if (tdo->nextlink == NULL) |
| 357 | tdo->nextlink = teedataobject_new(tdo->it); |
Neal Norwitz | 9029b5f | 2006-07-23 07:59:00 +0000 | [diff] [blame] | 358 | Py_XINCREF(tdo->nextlink); |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 359 | return tdo->nextlink; |
| 360 | } |
| 361 | |
| 362 | static PyObject * |
| 363 | teedataobject_getitem(teedataobject *tdo, int i) |
| 364 | { |
| 365 | PyObject *value; |
| 366 | |
| 367 | assert(i < LINKCELLS); |
| 368 | if (i < tdo->numread) |
| 369 | value = tdo->values[i]; |
| 370 | else { |
| 371 | /* this is the lead iterator, so fetch more data */ |
| 372 | assert(i == tdo->numread); |
| 373 | value = PyIter_Next(tdo->it); |
| 374 | if (value == NULL) |
| 375 | return NULL; |
| 376 | tdo->numread++; |
| 377 | tdo->values[i] = value; |
Raymond Hettinger | 4514369 | 2003-10-25 06:37:47 +0000 | [diff] [blame] | 378 | } |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 379 | Py_INCREF(value); |
| 380 | return value; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 381 | } |
| 382 | |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 383 | static int |
| 384 | teedataobject_traverse(teedataobject *tdo, visitproc visit, void * arg) |
| 385 | { |
| 386 | int i; |
| 387 | Py_VISIT(tdo->it); |
| 388 | for (i = 0; i < tdo->numread; i++) |
| 389 | Py_VISIT(tdo->values[i]); |
| 390 | Py_VISIT(tdo->nextlink); |
| 391 | return 0; |
| 392 | } |
| 393 | |
| 394 | static int |
| 395 | teedataobject_clear(teedataobject *tdo) |
| 396 | { |
| 397 | int i; |
| 398 | Py_CLEAR(tdo->it); |
| 399 | for (i=0 ; i<tdo->numread ; i++) |
| 400 | Py_CLEAR(tdo->values[i]); |
| 401 | Py_CLEAR(tdo->nextlink); |
| 402 | return 0; |
| 403 | } |
| 404 | |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 405 | static void |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 406 | teedataobject_dealloc(teedataobject *tdo) |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 407 | { |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 408 | PyObject_GC_UnTrack(tdo); |
| 409 | teedataobject_clear(tdo); |
| 410 | PyObject_GC_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 = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 416 | PyVarObject_HEAD_INIT(0, 0) /* Must fill in type value later */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 417 | "itertools.tee_dataobject", /* tp_name */ |
| 418 | sizeof(teedataobject), /* tp_basicsize */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 419 | 0, /* tp_itemsize */ |
| 420 | /* methods */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 421 | (destructor)teedataobject_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 422 | 0, /* tp_print */ |
| 423 | 0, /* tp_getattr */ |
| 424 | 0, /* tp_setattr */ |
| 425 | 0, /* tp_compare */ |
| 426 | 0, /* tp_repr */ |
| 427 | 0, /* tp_as_number */ |
| 428 | 0, /* tp_as_sequence */ |
| 429 | 0, /* tp_as_mapping */ |
| 430 | 0, /* tp_hash */ |
| 431 | 0, /* tp_call */ |
| 432 | 0, /* tp_str */ |
| 433 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 434 | 0, /* tp_setattro */ |
| 435 | 0, /* tp_as_buffer */ |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 436 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 437 | teedataobject_doc, /* tp_doc */ |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 438 | (traverseproc)teedataobject_traverse, /* tp_traverse */ |
| 439 | (inquiry)teedataobject_clear, /* tp_clear */ |
| 440 | 0, /* tp_richcompare */ |
| 441 | 0, /* tp_weaklistoffset */ |
| 442 | 0, /* tp_iter */ |
| 443 | 0, /* tp_iternext */ |
| 444 | 0, /* tp_methods */ |
| 445 | 0, /* tp_members */ |
| 446 | 0, /* tp_getset */ |
| 447 | 0, /* tp_base */ |
| 448 | 0, /* tp_dict */ |
| 449 | 0, /* tp_descr_get */ |
| 450 | 0, /* tp_descr_set */ |
| 451 | 0, /* tp_dictoffset */ |
| 452 | 0, /* tp_init */ |
| 453 | 0, /* tp_alloc */ |
| 454 | 0, /* tp_new */ |
| 455 | PyObject_GC_Del, /* tp_free */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 456 | }; |
| 457 | |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 458 | |
| 459 | static PyTypeObject tee_type; |
| 460 | |
| 461 | static PyObject * |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 462 | tee_next(teeobject *to) |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 463 | { |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 464 | PyObject *value, *link; |
| 465 | |
| 466 | if (to->index >= LINKCELLS) { |
| 467 | link = teedataobject_jumplink(to->dataobj); |
Neal Norwitz | 9029b5f | 2006-07-23 07:59:00 +0000 | [diff] [blame] | 468 | Py_DECREF(to->dataobj); |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 469 | to->dataobj = (teedataobject *)link; |
| 470 | to->index = 0; |
| 471 | } |
| 472 | value = teedataobject_getitem(to->dataobj, to->index); |
| 473 | if (value == NULL) |
| 474 | return NULL; |
| 475 | to->index++; |
| 476 | return value; |
| 477 | } |
| 478 | |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 479 | static int |
| 480 | tee_traverse(teeobject *to, visitproc visit, void *arg) |
| 481 | { |
| 482 | Py_VISIT((PyObject *)to->dataobj); |
| 483 | return 0; |
| 484 | } |
| 485 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 486 | static PyObject * |
| 487 | tee_copy(teeobject *to) |
| 488 | { |
| 489 | teeobject *newto; |
| 490 | |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 491 | newto = PyObject_GC_New(teeobject, &tee_type); |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 492 | if (newto == NULL) |
| 493 | return NULL; |
| 494 | Py_INCREF(to->dataobj); |
| 495 | newto->dataobj = to->dataobj; |
| 496 | newto->index = to->index; |
Raymond Hettinger | a9f6092 | 2004-10-17 16:40:14 +0000 | [diff] [blame] | 497 | newto->weakreflist = NULL; |
Thomas Wouters | b3deb94 | 2006-04-15 22:33:13 +0000 | [diff] [blame] | 498 | PyObject_GC_Track(newto); |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 499 | return (PyObject *)newto; |
| 500 | } |
| 501 | |
| 502 | PyDoc_STRVAR(teecopy_doc, "Returns an independent iterator."); |
| 503 | |
| 504 | static PyObject * |
| 505 | tee_fromiterable(PyObject *iterable) |
| 506 | { |
| 507 | teeobject *to; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 508 | PyObject *it = NULL; |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 509 | |
| 510 | it = PyObject_GetIter(iterable); |
| 511 | if (it == NULL) |
| 512 | return NULL; |
| 513 | if (PyObject_TypeCheck(it, &tee_type)) { |
| 514 | to = (teeobject *)tee_copy((teeobject *)it); |
| 515 | goto done; |
| 516 | } |
| 517 | |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 518 | to = PyObject_GC_New(teeobject, &tee_type); |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 519 | if (to == NULL) |
| 520 | goto done; |
| 521 | to->dataobj = (teedataobject *)teedataobject_new(it); |
Neal Norwitz | 9029b5f | 2006-07-23 07:59:00 +0000 | [diff] [blame] | 522 | if (!to->dataobj) { |
| 523 | PyObject_GC_Del(to); |
| 524 | to = NULL; |
| 525 | goto done; |
| 526 | } |
| 527 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 528 | to->index = 0; |
Raymond Hettinger | a9f6092 | 2004-10-17 16:40:14 +0000 | [diff] [blame] | 529 | to->weakreflist = NULL; |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 530 | PyObject_GC_Track(to); |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 531 | done: |
| 532 | Py_XDECREF(it); |
| 533 | return (PyObject *)to; |
| 534 | } |
| 535 | |
| 536 | static PyObject * |
| 537 | tee_new(PyTypeObject *type, PyObject *args, PyObject *kw) |
| 538 | { |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 539 | PyObject *iterable; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 540 | |
| 541 | if (!PyArg_UnpackTuple(args, "tee", 1, 1, &iterable)) |
| 542 | return NULL; |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 543 | return tee_fromiterable(iterable); |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 544 | } |
| 545 | |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 546 | static int |
| 547 | tee_clear(teeobject *to) |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 548 | { |
Raymond Hettinger | a9f6092 | 2004-10-17 16:40:14 +0000 | [diff] [blame] | 549 | if (to->weakreflist != NULL) |
| 550 | PyObject_ClearWeakRefs((PyObject *) to); |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 551 | Py_CLEAR(to->dataobj); |
| 552 | return 0; |
| 553 | } |
| 554 | |
| 555 | static void |
| 556 | tee_dealloc(teeobject *to) |
| 557 | { |
| 558 | PyObject_GC_UnTrack(to); |
| 559 | tee_clear(to); |
| 560 | PyObject_GC_Del(to); |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 561 | } |
| 562 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 563 | PyDoc_STRVAR(teeobject_doc, |
| 564 | "Iterator wrapped to make it copyable"); |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 565 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 566 | static PyMethodDef tee_methods[] = { |
| 567 | {"__copy__", (PyCFunction)tee_copy, METH_NOARGS, teecopy_doc}, |
| 568 | {NULL, NULL} /* sentinel */ |
| 569 | }; |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 570 | |
| 571 | static PyTypeObject tee_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 572 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 573 | "itertools.tee", /* tp_name */ |
| 574 | sizeof(teeobject), /* tp_basicsize */ |
| 575 | 0, /* tp_itemsize */ |
| 576 | /* methods */ |
| 577 | (destructor)tee_dealloc, /* tp_dealloc */ |
| 578 | 0, /* tp_print */ |
| 579 | 0, /* tp_getattr */ |
| 580 | 0, /* tp_setattr */ |
| 581 | 0, /* tp_compare */ |
| 582 | 0, /* tp_repr */ |
| 583 | 0, /* tp_as_number */ |
| 584 | 0, /* tp_as_sequence */ |
| 585 | 0, /* tp_as_mapping */ |
| 586 | 0, /* tp_hash */ |
| 587 | 0, /* tp_call */ |
| 588 | 0, /* tp_str */ |
Raymond Hettinger | f0c5aec | 2003-10-26 14:25:56 +0000 | [diff] [blame] | 589 | 0, /* tp_getattro */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 590 | 0, /* tp_setattro */ |
| 591 | 0, /* tp_as_buffer */ |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 592 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 593 | teeobject_doc, /* tp_doc */ |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 594 | (traverseproc)tee_traverse, /* tp_traverse */ |
| 595 | (inquiry)tee_clear, /* tp_clear */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 596 | 0, /* tp_richcompare */ |
Raymond Hettinger | a9f6092 | 2004-10-17 16:40:14 +0000 | [diff] [blame] | 597 | offsetof(teeobject, weakreflist), /* tp_weaklistoffset */ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 598 | PyObject_SelfIter, /* tp_iter */ |
| 599 | (iternextfunc)tee_next, /* tp_iternext */ |
| 600 | tee_methods, /* tp_methods */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 601 | 0, /* tp_members */ |
| 602 | 0, /* tp_getset */ |
| 603 | 0, /* tp_base */ |
| 604 | 0, /* tp_dict */ |
| 605 | 0, /* tp_descr_get */ |
| 606 | 0, /* tp_descr_set */ |
| 607 | 0, /* tp_dictoffset */ |
| 608 | 0, /* tp_init */ |
| 609 | 0, /* tp_alloc */ |
| 610 | tee_new, /* tp_new */ |
Thomas Wouters | 19bf33b | 2006-03-27 21:02:13 +0000 | [diff] [blame] | 611 | PyObject_GC_Del, /* tp_free */ |
Raymond Hettinger | 6a5b027 | 2003-10-24 08:45:23 +0000 | [diff] [blame] | 612 | }; |
| 613 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 614 | static PyObject * |
| 615 | tee(PyObject *self, PyObject *args) |
| 616 | { |
Neal Norwitz | 69e8897 | 2006-09-02 02:58:13 +0000 | [diff] [blame] | 617 | Py_ssize_t i, n=2; |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 618 | PyObject *it, *iterable, *copyable, *result; |
| 619 | |
Neal Norwitz | 69e8897 | 2006-09-02 02:58:13 +0000 | [diff] [blame] | 620 | if (!PyArg_ParseTuple(args, "O|n", &iterable, &n)) |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 621 | return NULL; |
Neal Norwitz | 69e8897 | 2006-09-02 02:58:13 +0000 | [diff] [blame] | 622 | if (n < 0) { |
| 623 | PyErr_SetString(PyExc_ValueError, "n must be >= 0"); |
| 624 | return NULL; |
| 625 | } |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 626 | result = PyTuple_New(n); |
| 627 | if (result == NULL) |
| 628 | return NULL; |
| 629 | if (n == 0) |
| 630 | return result; |
| 631 | it = PyObject_GetIter(iterable); |
| 632 | if (it == NULL) { |
| 633 | Py_DECREF(result); |
| 634 | return NULL; |
| 635 | } |
| 636 | if (!PyObject_HasAttrString(it, "__copy__")) { |
| 637 | copyable = tee_fromiterable(it); |
| 638 | Py_DECREF(it); |
| 639 | if (copyable == NULL) { |
| 640 | Py_DECREF(result); |
| 641 | return NULL; |
| 642 | } |
| 643 | } else |
| 644 | copyable = it; |
| 645 | PyTuple_SET_ITEM(result, 0, copyable); |
| 646 | for (i=1 ; i<n ; i++) { |
| 647 | copyable = PyObject_CallMethod(copyable, "__copy__", NULL); |
| 648 | if (copyable == NULL) { |
| 649 | Py_DECREF(result); |
| 650 | return NULL; |
| 651 | } |
| 652 | PyTuple_SET_ITEM(result, i, copyable); |
| 653 | } |
| 654 | return result; |
| 655 | } |
| 656 | |
| 657 | PyDoc_STRVAR(tee_doc, |
| 658 | "tee(iterable, n=2) --> tuple of n independent iterators."); |
| 659 | |
| 660 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 661 | /* cycle object **********************************************************/ |
| 662 | |
| 663 | typedef struct { |
| 664 | PyObject_HEAD |
| 665 | PyObject *it; |
| 666 | PyObject *saved; |
| 667 | int firstpass; |
| 668 | } cycleobject; |
| 669 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 670 | static PyTypeObject cycle_type; |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 671 | |
| 672 | static PyObject * |
| 673 | cycle_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 674 | { |
| 675 | PyObject *it; |
| 676 | PyObject *iterable; |
| 677 | PyObject *saved; |
| 678 | cycleobject *lz; |
| 679 | |
Georg Brandl | b84c137 | 2007-01-21 10:28:43 +0000 | [diff] [blame] | 680 | if (type == &cycle_type && !_PyArg_NoKeywords("cycle()", kwds)) |
Georg Brandl | 02c4287 | 2005-08-26 06:42:30 +0000 | [diff] [blame] | 681 | return NULL; |
| 682 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 683 | if (!PyArg_UnpackTuple(args, "cycle", 1, 1, &iterable)) |
| 684 | return NULL; |
| 685 | |
| 686 | /* Get iterator. */ |
| 687 | it = PyObject_GetIter(iterable); |
| 688 | if (it == NULL) |
| 689 | return NULL; |
| 690 | |
| 691 | saved = PyList_New(0); |
| 692 | if (saved == NULL) { |
| 693 | Py_DECREF(it); |
| 694 | return NULL; |
| 695 | } |
| 696 | |
| 697 | /* create cycleobject structure */ |
| 698 | lz = (cycleobject *)type->tp_alloc(type, 0); |
| 699 | if (lz == NULL) { |
| 700 | Py_DECREF(it); |
| 701 | Py_DECREF(saved); |
| 702 | return NULL; |
| 703 | } |
| 704 | lz->it = it; |
| 705 | lz->saved = saved; |
| 706 | lz->firstpass = 0; |
| 707 | |
| 708 | return (PyObject *)lz; |
| 709 | } |
| 710 | |
| 711 | static void |
| 712 | cycle_dealloc(cycleobject *lz) |
| 713 | { |
| 714 | PyObject_GC_UnTrack(lz); |
| 715 | Py_XDECREF(lz->saved); |
| 716 | Py_XDECREF(lz->it); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 717 | Py_TYPE(lz)->tp_free(lz); |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 718 | } |
| 719 | |
| 720 | static int |
| 721 | cycle_traverse(cycleobject *lz, visitproc visit, void *arg) |
| 722 | { |
Raymond Hettinger | 58ed69b | 2004-07-15 05:32:47 +0000 | [diff] [blame] | 723 | Py_VISIT(lz->it); |
| 724 | Py_VISIT(lz->saved); |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 725 | return 0; |
| 726 | } |
| 727 | |
| 728 | static PyObject * |
| 729 | cycle_next(cycleobject *lz) |
| 730 | { |
| 731 | PyObject *item; |
| 732 | PyObject *it; |
Raymond Hettinger | 880430e | 2004-10-02 10:56:43 +0000 | [diff] [blame] | 733 | PyObject *tmp; |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 734 | |
| 735 | while (1) { |
| 736 | item = PyIter_Next(lz->it); |
| 737 | if (item != NULL) { |
| 738 | if (!lz->firstpass) |
| 739 | PyList_Append(lz->saved, item); |
| 740 | return item; |
| 741 | } |
Raymond Hettinger | 9d7c870 | 2004-05-08 19:49:42 +0000 | [diff] [blame] | 742 | if (PyErr_Occurred()) { |
| 743 | if (PyErr_ExceptionMatches(PyExc_StopIteration)) |
| 744 | PyErr_Clear(); |
| 745 | else |
| 746 | return NULL; |
| 747 | } |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 748 | if (PyList_Size(lz->saved) == 0) |
| 749 | return NULL; |
| 750 | it = PyObject_GetIter(lz->saved); |
| 751 | if (it == NULL) |
| 752 | return NULL; |
Raymond Hettinger | 880430e | 2004-10-02 10:56:43 +0000 | [diff] [blame] | 753 | tmp = lz->it; |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 754 | lz->it = it; |
| 755 | lz->firstpass = 1; |
Raymond Hettinger | 880430e | 2004-10-02 10:56:43 +0000 | [diff] [blame] | 756 | Py_DECREF(tmp); |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 757 | } |
| 758 | } |
| 759 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 760 | PyDoc_STRVAR(cycle_doc, |
| 761 | "cycle(iterable) --> cycle object\n\ |
| 762 | \n\ |
| 763 | Return elements from the iterable until it is exhausted.\n\ |
| 764 | Then repeat the sequence indefinitely."); |
| 765 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 766 | static PyTypeObject cycle_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 767 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 768 | "itertools.cycle", /* tp_name */ |
| 769 | sizeof(cycleobject), /* tp_basicsize */ |
| 770 | 0, /* tp_itemsize */ |
| 771 | /* methods */ |
| 772 | (destructor)cycle_dealloc, /* tp_dealloc */ |
| 773 | 0, /* tp_print */ |
| 774 | 0, /* tp_getattr */ |
| 775 | 0, /* tp_setattr */ |
| 776 | 0, /* tp_compare */ |
| 777 | 0, /* tp_repr */ |
| 778 | 0, /* tp_as_number */ |
| 779 | 0, /* tp_as_sequence */ |
| 780 | 0, /* tp_as_mapping */ |
| 781 | 0, /* tp_hash */ |
| 782 | 0, /* tp_call */ |
| 783 | 0, /* tp_str */ |
| 784 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 785 | 0, /* tp_setattro */ |
| 786 | 0, /* tp_as_buffer */ |
| 787 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 788 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| 789 | cycle_doc, /* tp_doc */ |
| 790 | (traverseproc)cycle_traverse, /* tp_traverse */ |
| 791 | 0, /* tp_clear */ |
| 792 | 0, /* tp_richcompare */ |
| 793 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 794 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 795 | (iternextfunc)cycle_next, /* tp_iternext */ |
| 796 | 0, /* tp_methods */ |
| 797 | 0, /* tp_members */ |
| 798 | 0, /* tp_getset */ |
| 799 | 0, /* tp_base */ |
| 800 | 0, /* tp_dict */ |
| 801 | 0, /* tp_descr_get */ |
| 802 | 0, /* tp_descr_set */ |
| 803 | 0, /* tp_dictoffset */ |
| 804 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 805 | 0, /* tp_alloc */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 806 | cycle_new, /* tp_new */ |
| 807 | PyObject_GC_Del, /* tp_free */ |
| 808 | }; |
| 809 | |
| 810 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 811 | /* dropwhile object **********************************************************/ |
| 812 | |
| 813 | typedef struct { |
| 814 | PyObject_HEAD |
| 815 | PyObject *func; |
| 816 | PyObject *it; |
| 817 | long start; |
| 818 | } dropwhileobject; |
| 819 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 820 | static PyTypeObject dropwhile_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 821 | |
| 822 | static PyObject * |
| 823 | dropwhile_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 824 | { |
| 825 | PyObject *func, *seq; |
| 826 | PyObject *it; |
| 827 | dropwhileobject *lz; |
| 828 | |
Georg Brandl | b84c137 | 2007-01-21 10:28:43 +0000 | [diff] [blame] | 829 | if (type == &dropwhile_type && !_PyArg_NoKeywords("dropwhile()", kwds)) |
Georg Brandl | 02c4287 | 2005-08-26 06:42:30 +0000 | [diff] [blame] | 830 | return NULL; |
| 831 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 832 | if (!PyArg_UnpackTuple(args, "dropwhile", 2, 2, &func, &seq)) |
| 833 | return NULL; |
| 834 | |
| 835 | /* Get iterator. */ |
| 836 | it = PyObject_GetIter(seq); |
| 837 | if (it == NULL) |
| 838 | return NULL; |
| 839 | |
| 840 | /* create dropwhileobject structure */ |
| 841 | lz = (dropwhileobject *)type->tp_alloc(type, 0); |
| 842 | if (lz == NULL) { |
| 843 | Py_DECREF(it); |
| 844 | return NULL; |
| 845 | } |
| 846 | Py_INCREF(func); |
| 847 | lz->func = func; |
| 848 | lz->it = it; |
| 849 | lz->start = 0; |
| 850 | |
| 851 | return (PyObject *)lz; |
| 852 | } |
| 853 | |
| 854 | static void |
| 855 | dropwhile_dealloc(dropwhileobject *lz) |
| 856 | { |
| 857 | PyObject_GC_UnTrack(lz); |
| 858 | Py_XDECREF(lz->func); |
| 859 | Py_XDECREF(lz->it); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 860 | Py_TYPE(lz)->tp_free(lz); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 861 | } |
| 862 | |
| 863 | static int |
| 864 | dropwhile_traverse(dropwhileobject *lz, visitproc visit, void *arg) |
| 865 | { |
Raymond Hettinger | 58ed69b | 2004-07-15 05:32:47 +0000 | [diff] [blame] | 866 | Py_VISIT(lz->it); |
| 867 | Py_VISIT(lz->func); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 868 | return 0; |
| 869 | } |
| 870 | |
| 871 | static PyObject * |
| 872 | dropwhile_next(dropwhileobject *lz) |
| 873 | { |
| 874 | PyObject *item, *good; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 875 | PyObject *it = lz->it; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 876 | long ok; |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 877 | PyObject *(*iternext)(PyObject *); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 878 | |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 879 | assert(PyIter_Check(it)); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 880 | iternext = *Py_TYPE(it)->tp_iternext; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 881 | for (;;) { |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 882 | item = iternext(it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 883 | if (item == NULL) |
| 884 | return NULL; |
| 885 | if (lz->start == 1) |
| 886 | return item; |
| 887 | |
| 888 | good = PyObject_CallFunctionObjArgs(lz->func, item, NULL); |
| 889 | if (good == NULL) { |
| 890 | Py_DECREF(item); |
| 891 | return NULL; |
| 892 | } |
| 893 | ok = PyObject_IsTrue(good); |
| 894 | Py_DECREF(good); |
| 895 | if (!ok) { |
| 896 | lz->start = 1; |
| 897 | return item; |
| 898 | } |
| 899 | Py_DECREF(item); |
| 900 | } |
| 901 | } |
| 902 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 903 | PyDoc_STRVAR(dropwhile_doc, |
| 904 | "dropwhile(predicate, iterable) --> dropwhile object\n\ |
| 905 | \n\ |
| 906 | Drop items from the iterable while predicate(item) is true.\n\ |
| 907 | Afterwards, return every element until the iterable is exhausted."); |
| 908 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 909 | static PyTypeObject dropwhile_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 910 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 911 | "itertools.dropwhile", /* tp_name */ |
| 912 | sizeof(dropwhileobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 913 | 0, /* tp_itemsize */ |
| 914 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 915 | (destructor)dropwhile_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 916 | 0, /* tp_print */ |
| 917 | 0, /* tp_getattr */ |
| 918 | 0, /* tp_setattr */ |
| 919 | 0, /* tp_compare */ |
| 920 | 0, /* tp_repr */ |
| 921 | 0, /* tp_as_number */ |
| 922 | 0, /* tp_as_sequence */ |
| 923 | 0, /* tp_as_mapping */ |
| 924 | 0, /* tp_hash */ |
| 925 | 0, /* tp_call */ |
| 926 | 0, /* tp_str */ |
| 927 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 928 | 0, /* tp_setattro */ |
| 929 | 0, /* tp_as_buffer */ |
| 930 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 931 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 932 | dropwhile_doc, /* tp_doc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 933 | (traverseproc)dropwhile_traverse, /* tp_traverse */ |
| 934 | 0, /* tp_clear */ |
| 935 | 0, /* tp_richcompare */ |
| 936 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 937 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 938 | (iternextfunc)dropwhile_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 939 | 0, /* tp_methods */ |
| 940 | 0, /* tp_members */ |
| 941 | 0, /* tp_getset */ |
| 942 | 0, /* tp_base */ |
| 943 | 0, /* tp_dict */ |
| 944 | 0, /* tp_descr_get */ |
| 945 | 0, /* tp_descr_set */ |
| 946 | 0, /* tp_dictoffset */ |
| 947 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 948 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 949 | dropwhile_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 950 | PyObject_GC_Del, /* tp_free */ |
| 951 | }; |
| 952 | |
| 953 | |
| 954 | /* takewhile object **********************************************************/ |
| 955 | |
| 956 | typedef struct { |
| 957 | PyObject_HEAD |
| 958 | PyObject *func; |
| 959 | PyObject *it; |
| 960 | long stop; |
| 961 | } takewhileobject; |
| 962 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 963 | static PyTypeObject takewhile_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 964 | |
| 965 | static PyObject * |
| 966 | takewhile_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 967 | { |
| 968 | PyObject *func, *seq; |
| 969 | PyObject *it; |
| 970 | takewhileobject *lz; |
| 971 | |
Georg Brandl | b84c137 | 2007-01-21 10:28:43 +0000 | [diff] [blame] | 972 | if (type == &takewhile_type && !_PyArg_NoKeywords("takewhile()", kwds)) |
Georg Brandl | 02c4287 | 2005-08-26 06:42:30 +0000 | [diff] [blame] | 973 | return NULL; |
| 974 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 975 | if (!PyArg_UnpackTuple(args, "takewhile", 2, 2, &func, &seq)) |
| 976 | return NULL; |
| 977 | |
| 978 | /* Get iterator. */ |
| 979 | it = PyObject_GetIter(seq); |
| 980 | if (it == NULL) |
| 981 | return NULL; |
| 982 | |
| 983 | /* create takewhileobject structure */ |
| 984 | lz = (takewhileobject *)type->tp_alloc(type, 0); |
| 985 | if (lz == NULL) { |
| 986 | Py_DECREF(it); |
| 987 | return NULL; |
| 988 | } |
| 989 | Py_INCREF(func); |
| 990 | lz->func = func; |
| 991 | lz->it = it; |
| 992 | lz->stop = 0; |
| 993 | |
| 994 | return (PyObject *)lz; |
| 995 | } |
| 996 | |
| 997 | static void |
| 998 | takewhile_dealloc(takewhileobject *lz) |
| 999 | { |
| 1000 | PyObject_GC_UnTrack(lz); |
| 1001 | Py_XDECREF(lz->func); |
| 1002 | Py_XDECREF(lz->it); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1003 | Py_TYPE(lz)->tp_free(lz); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1004 | } |
| 1005 | |
| 1006 | static int |
| 1007 | takewhile_traverse(takewhileobject *lz, visitproc visit, void *arg) |
| 1008 | { |
Raymond Hettinger | 58ed69b | 2004-07-15 05:32:47 +0000 | [diff] [blame] | 1009 | Py_VISIT(lz->it); |
| 1010 | Py_VISIT(lz->func); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1011 | return 0; |
| 1012 | } |
| 1013 | |
| 1014 | static PyObject * |
| 1015 | takewhile_next(takewhileobject *lz) |
| 1016 | { |
| 1017 | PyObject *item, *good; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 1018 | PyObject *it = lz->it; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1019 | long ok; |
| 1020 | |
| 1021 | if (lz->stop == 1) |
| 1022 | return NULL; |
| 1023 | |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 1024 | assert(PyIter_Check(it)); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1025 | item = (*Py_TYPE(it)->tp_iternext)(it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1026 | if (item == NULL) |
| 1027 | return NULL; |
| 1028 | |
| 1029 | good = PyObject_CallFunctionObjArgs(lz->func, item, NULL); |
| 1030 | if (good == NULL) { |
| 1031 | Py_DECREF(item); |
| 1032 | return NULL; |
| 1033 | } |
| 1034 | ok = PyObject_IsTrue(good); |
| 1035 | Py_DECREF(good); |
| 1036 | if (ok) |
| 1037 | return item; |
| 1038 | Py_DECREF(item); |
| 1039 | lz->stop = 1; |
| 1040 | return NULL; |
| 1041 | } |
| 1042 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1043 | PyDoc_STRVAR(takewhile_doc, |
| 1044 | "takewhile(predicate, iterable) --> takewhile object\n\ |
| 1045 | \n\ |
| 1046 | Return successive entries from an iterable as long as the \n\ |
| 1047 | predicate evaluates to true for each entry."); |
| 1048 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1049 | static PyTypeObject takewhile_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 1050 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1051 | "itertools.takewhile", /* tp_name */ |
| 1052 | sizeof(takewhileobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1053 | 0, /* tp_itemsize */ |
| 1054 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1055 | (destructor)takewhile_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1056 | 0, /* tp_print */ |
| 1057 | 0, /* tp_getattr */ |
| 1058 | 0, /* tp_setattr */ |
| 1059 | 0, /* tp_compare */ |
| 1060 | 0, /* tp_repr */ |
| 1061 | 0, /* tp_as_number */ |
| 1062 | 0, /* tp_as_sequence */ |
| 1063 | 0, /* tp_as_mapping */ |
| 1064 | 0, /* tp_hash */ |
| 1065 | 0, /* tp_call */ |
| 1066 | 0, /* tp_str */ |
| 1067 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 1068 | 0, /* tp_setattro */ |
| 1069 | 0, /* tp_as_buffer */ |
| 1070 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 1071 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1072 | takewhile_doc, /* tp_doc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1073 | (traverseproc)takewhile_traverse, /* tp_traverse */ |
| 1074 | 0, /* tp_clear */ |
| 1075 | 0, /* tp_richcompare */ |
| 1076 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 1077 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1078 | (iternextfunc)takewhile_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1079 | 0, /* tp_methods */ |
| 1080 | 0, /* tp_members */ |
| 1081 | 0, /* tp_getset */ |
| 1082 | 0, /* tp_base */ |
| 1083 | 0, /* tp_dict */ |
| 1084 | 0, /* tp_descr_get */ |
| 1085 | 0, /* tp_descr_set */ |
| 1086 | 0, /* tp_dictoffset */ |
| 1087 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 1088 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1089 | takewhile_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1090 | PyObject_GC_Del, /* tp_free */ |
| 1091 | }; |
| 1092 | |
| 1093 | |
| 1094 | /* islice object ************************************************************/ |
| 1095 | |
| 1096 | typedef struct { |
| 1097 | PyObject_HEAD |
| 1098 | PyObject *it; |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 1099 | Py_ssize_t next; |
| 1100 | Py_ssize_t stop; |
| 1101 | Py_ssize_t step; |
| 1102 | Py_ssize_t cnt; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1103 | } isliceobject; |
| 1104 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1105 | static PyTypeObject islice_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1106 | |
| 1107 | static PyObject * |
| 1108 | islice_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 1109 | { |
| 1110 | PyObject *seq; |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 1111 | Py_ssize_t start=0, stop=-1, step=1; |
Raymond Hettinger | b259405 | 2004-12-05 09:25:51 +0000 | [diff] [blame] | 1112 | PyObject *it, *a1=NULL, *a2=NULL, *a3=NULL; |
Martin v. Löwis | ad0a462 | 2006-02-16 14:30:23 +0000 | [diff] [blame] | 1113 | Py_ssize_t numargs; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1114 | isliceobject *lz; |
| 1115 | |
Georg Brandl | b84c137 | 2007-01-21 10:28:43 +0000 | [diff] [blame] | 1116 | if (type == &islice_type && !_PyArg_NoKeywords("islice()", kwds)) |
Georg Brandl | 02c4287 | 2005-08-26 06:42:30 +0000 | [diff] [blame] | 1117 | return NULL; |
| 1118 | |
Raymond Hettinger | b259405 | 2004-12-05 09:25:51 +0000 | [diff] [blame] | 1119 | if (!PyArg_UnpackTuple(args, "islice", 2, 4, &seq, &a1, &a2, &a3)) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1120 | return NULL; |
| 1121 | |
Raymond Hettinger | b259405 | 2004-12-05 09:25:51 +0000 | [diff] [blame] | 1122 | numargs = PyTuple_Size(args); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1123 | if (numargs == 2) { |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1124 | if (a1 != Py_None) { |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 1125 | stop = PyInt_AsSsize_t(a1); |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1126 | if (stop == -1) { |
| 1127 | if (PyErr_Occurred()) |
| 1128 | PyErr_Clear(); |
| 1129 | PyErr_SetString(PyExc_ValueError, |
Raymond Hettinger | b259405 | 2004-12-05 09:25:51 +0000 | [diff] [blame] | 1130 | "Stop argument for islice() must be a non-negative integer or None."); |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1131 | return NULL; |
| 1132 | } |
| 1133 | } |
Raymond Hettinger | 341deb7 | 2003-05-02 19:44:20 +0000 | [diff] [blame] | 1134 | } else { |
Raymond Hettinger | b259405 | 2004-12-05 09:25:51 +0000 | [diff] [blame] | 1135 | if (a1 != Py_None) |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 1136 | start = PyInt_AsSsize_t(a1); |
Raymond Hettinger | b259405 | 2004-12-05 09:25:51 +0000 | [diff] [blame] | 1137 | if (start == -1 && PyErr_Occurred()) |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1138 | PyErr_Clear(); |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1139 | if (a2 != Py_None) { |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 1140 | stop = PyInt_AsSsize_t(a2); |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1141 | if (stop == -1) { |
| 1142 | if (PyErr_Occurred()) |
| 1143 | PyErr_Clear(); |
| 1144 | PyErr_SetString(PyExc_ValueError, |
Raymond Hettinger | b259405 | 2004-12-05 09:25:51 +0000 | [diff] [blame] | 1145 | "Stop argument for islice() must be a non-negative integer or None."); |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1146 | return NULL; |
| 1147 | } |
| 1148 | } |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1149 | } |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1150 | if (start<0 || stop<-1) { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1151 | PyErr_SetString(PyExc_ValueError, |
Raymond Hettinger | b259405 | 2004-12-05 09:25:51 +0000 | [diff] [blame] | 1152 | "Indices for islice() must be non-negative integers or None."); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1153 | return NULL; |
| 1154 | } |
| 1155 | |
Raymond Hettinger | b259405 | 2004-12-05 09:25:51 +0000 | [diff] [blame] | 1156 | if (a3 != NULL) { |
| 1157 | if (a3 != Py_None) |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 1158 | step = PyInt_AsSsize_t(a3); |
Raymond Hettinger | b259405 | 2004-12-05 09:25:51 +0000 | [diff] [blame] | 1159 | if (step == -1 && PyErr_Occurred()) |
| 1160 | PyErr_Clear(); |
| 1161 | } |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1162 | if (step<1) { |
| 1163 | PyErr_SetString(PyExc_ValueError, |
Raymond Hettinger | b259405 | 2004-12-05 09:25:51 +0000 | [diff] [blame] | 1164 | "Step for islice() must be a positive integer or None."); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1165 | return NULL; |
| 1166 | } |
| 1167 | |
| 1168 | /* Get iterator. */ |
| 1169 | it = PyObject_GetIter(seq); |
| 1170 | if (it == NULL) |
| 1171 | return NULL; |
| 1172 | |
| 1173 | /* create isliceobject structure */ |
| 1174 | lz = (isliceobject *)type->tp_alloc(type, 0); |
| 1175 | if (lz == NULL) { |
| 1176 | Py_DECREF(it); |
| 1177 | return NULL; |
| 1178 | } |
| 1179 | lz->it = it; |
| 1180 | lz->next = start; |
| 1181 | lz->stop = stop; |
| 1182 | lz->step = step; |
| 1183 | lz->cnt = 0L; |
| 1184 | |
| 1185 | return (PyObject *)lz; |
| 1186 | } |
| 1187 | |
| 1188 | static void |
| 1189 | islice_dealloc(isliceobject *lz) |
| 1190 | { |
| 1191 | PyObject_GC_UnTrack(lz); |
| 1192 | Py_XDECREF(lz->it); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1193 | Py_TYPE(lz)->tp_free(lz); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1194 | } |
| 1195 | |
| 1196 | static int |
| 1197 | islice_traverse(isliceobject *lz, visitproc visit, void *arg) |
| 1198 | { |
Raymond Hettinger | 58ed69b | 2004-07-15 05:32:47 +0000 | [diff] [blame] | 1199 | Py_VISIT(lz->it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1200 | return 0; |
| 1201 | } |
| 1202 | |
| 1203 | static PyObject * |
| 1204 | islice_next(isliceobject *lz) |
| 1205 | { |
| 1206 | PyObject *item; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 1207 | PyObject *it = lz->it; |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 1208 | Py_ssize_t oldnext; |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1209 | PyObject *(*iternext)(PyObject *); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1210 | |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1211 | assert(PyIter_Check(it)); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1212 | iternext = *Py_TYPE(it)->tp_iternext; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1213 | while (lz->cnt < lz->next) { |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1214 | item = iternext(it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1215 | if (item == NULL) |
| 1216 | return NULL; |
| 1217 | Py_DECREF(item); |
| 1218 | lz->cnt++; |
| 1219 | } |
Raymond Hettinger | 14ef54c | 2003-05-02 19:04:37 +0000 | [diff] [blame] | 1220 | if (lz->stop != -1 && lz->cnt >= lz->stop) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1221 | return NULL; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 1222 | assert(PyIter_Check(it)); |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 1223 | item = iternext(it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1224 | if (item == NULL) |
| 1225 | return NULL; |
| 1226 | lz->cnt++; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1227 | oldnext = lz->next; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1228 | lz->next += lz->step; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1229 | if (lz->next < oldnext) /* Check for overflow */ |
| 1230 | lz->next = lz->stop; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1231 | return item; |
| 1232 | } |
| 1233 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1234 | PyDoc_STRVAR(islice_doc, |
| 1235 | "islice(iterable, [start,] stop [, step]) --> islice object\n\ |
| 1236 | \n\ |
| 1237 | Return an iterator whose next() method returns selected values from an\n\ |
| 1238 | iterable. If start is specified, will skip all preceding elements;\n\ |
| 1239 | otherwise, start defaults to zero. Step defaults to one. If\n\ |
| 1240 | specified as another value, step determines how many values are \n\ |
| 1241 | skipped between successive calls. Works like a slice() on a list\n\ |
| 1242 | but returns an iterator."); |
| 1243 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1244 | static PyTypeObject islice_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 1245 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1246 | "itertools.islice", /* tp_name */ |
| 1247 | sizeof(isliceobject), /* tp_basicsize */ |
| 1248 | 0, /* tp_itemsize */ |
| 1249 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1250 | (destructor)islice_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1251 | 0, /* tp_print */ |
| 1252 | 0, /* tp_getattr */ |
| 1253 | 0, /* tp_setattr */ |
| 1254 | 0, /* tp_compare */ |
| 1255 | 0, /* tp_repr */ |
| 1256 | 0, /* tp_as_number */ |
| 1257 | 0, /* tp_as_sequence */ |
| 1258 | 0, /* tp_as_mapping */ |
| 1259 | 0, /* tp_hash */ |
| 1260 | 0, /* tp_call */ |
| 1261 | 0, /* tp_str */ |
| 1262 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 1263 | 0, /* tp_setattro */ |
| 1264 | 0, /* tp_as_buffer */ |
| 1265 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 1266 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1267 | islice_doc, /* tp_doc */ |
| 1268 | (traverseproc)islice_traverse, /* tp_traverse */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1269 | 0, /* tp_clear */ |
| 1270 | 0, /* tp_richcompare */ |
| 1271 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 1272 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1273 | (iternextfunc)islice_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1274 | 0, /* tp_methods */ |
| 1275 | 0, /* tp_members */ |
| 1276 | 0, /* tp_getset */ |
| 1277 | 0, /* tp_base */ |
| 1278 | 0, /* tp_dict */ |
| 1279 | 0, /* tp_descr_get */ |
| 1280 | 0, /* tp_descr_set */ |
| 1281 | 0, /* tp_dictoffset */ |
| 1282 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 1283 | 0, /* tp_alloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1284 | islice_new, /* tp_new */ |
| 1285 | PyObject_GC_Del, /* tp_free */ |
| 1286 | }; |
| 1287 | |
| 1288 | |
| 1289 | /* starmap object ************************************************************/ |
| 1290 | |
| 1291 | typedef struct { |
| 1292 | PyObject_HEAD |
| 1293 | PyObject *func; |
| 1294 | PyObject *it; |
| 1295 | } starmapobject; |
| 1296 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1297 | static PyTypeObject starmap_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1298 | |
| 1299 | static PyObject * |
| 1300 | starmap_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 1301 | { |
| 1302 | PyObject *func, *seq; |
| 1303 | PyObject *it; |
| 1304 | starmapobject *lz; |
| 1305 | |
Georg Brandl | b84c137 | 2007-01-21 10:28:43 +0000 | [diff] [blame] | 1306 | if (type == &starmap_type && !_PyArg_NoKeywords("starmap()", kwds)) |
Georg Brandl | 02c4287 | 2005-08-26 06:42:30 +0000 | [diff] [blame] | 1307 | return NULL; |
| 1308 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1309 | if (!PyArg_UnpackTuple(args, "starmap", 2, 2, &func, &seq)) |
| 1310 | return NULL; |
| 1311 | |
| 1312 | /* Get iterator. */ |
| 1313 | it = PyObject_GetIter(seq); |
| 1314 | if (it == NULL) |
| 1315 | return NULL; |
| 1316 | |
| 1317 | /* create starmapobject structure */ |
| 1318 | lz = (starmapobject *)type->tp_alloc(type, 0); |
| 1319 | if (lz == NULL) { |
| 1320 | Py_DECREF(it); |
| 1321 | return NULL; |
| 1322 | } |
| 1323 | Py_INCREF(func); |
| 1324 | lz->func = func; |
| 1325 | lz->it = it; |
| 1326 | |
| 1327 | return (PyObject *)lz; |
| 1328 | } |
| 1329 | |
| 1330 | static void |
| 1331 | starmap_dealloc(starmapobject *lz) |
| 1332 | { |
| 1333 | PyObject_GC_UnTrack(lz); |
| 1334 | Py_XDECREF(lz->func); |
| 1335 | Py_XDECREF(lz->it); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1336 | Py_TYPE(lz)->tp_free(lz); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1337 | } |
| 1338 | |
| 1339 | static int |
| 1340 | starmap_traverse(starmapobject *lz, visitproc visit, void *arg) |
| 1341 | { |
Raymond Hettinger | 58ed69b | 2004-07-15 05:32:47 +0000 | [diff] [blame] | 1342 | Py_VISIT(lz->it); |
| 1343 | Py_VISIT(lz->func); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1344 | return 0; |
| 1345 | } |
| 1346 | |
| 1347 | static PyObject * |
| 1348 | starmap_next(starmapobject *lz) |
| 1349 | { |
| 1350 | PyObject *args; |
| 1351 | PyObject *result; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 1352 | PyObject *it = lz->it; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1353 | |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 1354 | assert(PyIter_Check(it)); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1355 | args = (*Py_TYPE(it)->tp_iternext)(it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1356 | if (args == NULL) |
| 1357 | return NULL; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1358 | if (!PyTuple_CheckExact(args)) { |
Raymond Hettinger | 4731709 | 2008-01-17 03:02:14 +0000 | [diff] [blame] | 1359 | PyObject *newargs = PySequence_Tuple(args); |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1360 | Py_DECREF(args); |
Raymond Hettinger | 4731709 | 2008-01-17 03:02:14 +0000 | [diff] [blame] | 1361 | if (newargs == NULL) |
| 1362 | return NULL; |
| 1363 | args = newargs; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1364 | } |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1365 | result = PyObject_Call(lz->func, args, NULL); |
| 1366 | Py_DECREF(args); |
| 1367 | return result; |
| 1368 | } |
| 1369 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1370 | PyDoc_STRVAR(starmap_doc, |
| 1371 | "starmap(function, sequence) --> starmap object\n\ |
| 1372 | \n\ |
| 1373 | Return an iterator whose values are returned from the function evaluated\n\ |
| 1374 | with a argument tuple taken from the given sequence."); |
| 1375 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1376 | static PyTypeObject starmap_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 1377 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1378 | "itertools.starmap", /* tp_name */ |
| 1379 | sizeof(starmapobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1380 | 0, /* tp_itemsize */ |
| 1381 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1382 | (destructor)starmap_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1383 | 0, /* tp_print */ |
| 1384 | 0, /* tp_getattr */ |
| 1385 | 0, /* tp_setattr */ |
| 1386 | 0, /* tp_compare */ |
| 1387 | 0, /* tp_repr */ |
| 1388 | 0, /* tp_as_number */ |
| 1389 | 0, /* tp_as_sequence */ |
| 1390 | 0, /* tp_as_mapping */ |
| 1391 | 0, /* tp_hash */ |
| 1392 | 0, /* tp_call */ |
| 1393 | 0, /* tp_str */ |
| 1394 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 1395 | 0, /* tp_setattro */ |
| 1396 | 0, /* tp_as_buffer */ |
| 1397 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 1398 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1399 | starmap_doc, /* tp_doc */ |
| 1400 | (traverseproc)starmap_traverse, /* tp_traverse */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1401 | 0, /* tp_clear */ |
| 1402 | 0, /* tp_richcompare */ |
| 1403 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 1404 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1405 | (iternextfunc)starmap_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1406 | 0, /* tp_methods */ |
| 1407 | 0, /* tp_members */ |
| 1408 | 0, /* tp_getset */ |
| 1409 | 0, /* tp_base */ |
| 1410 | 0, /* tp_dict */ |
| 1411 | 0, /* tp_descr_get */ |
| 1412 | 0, /* tp_descr_set */ |
| 1413 | 0, /* tp_dictoffset */ |
| 1414 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 1415 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1416 | starmap_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1417 | PyObject_GC_Del, /* tp_free */ |
| 1418 | }; |
| 1419 | |
| 1420 | |
| 1421 | /* imap object ************************************************************/ |
| 1422 | |
| 1423 | typedef struct { |
| 1424 | PyObject_HEAD |
| 1425 | PyObject *iters; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1426 | PyObject *func; |
| 1427 | } imapobject; |
| 1428 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1429 | static PyTypeObject imap_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1430 | |
| 1431 | static PyObject * |
| 1432 | imap_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 1433 | { |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 1434 | PyObject *it, *iters, *func; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1435 | imapobject *lz; |
Martin v. Löwis | ad0a462 | 2006-02-16 14:30:23 +0000 | [diff] [blame] | 1436 | Py_ssize_t numargs, i; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1437 | |
Georg Brandl | b84c137 | 2007-01-21 10:28:43 +0000 | [diff] [blame] | 1438 | if (type == &imap_type && !_PyArg_NoKeywords("imap()", kwds)) |
Georg Brandl | 02c4287 | 2005-08-26 06:42:30 +0000 | [diff] [blame] | 1439 | return NULL; |
| 1440 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1441 | numargs = PyTuple_Size(args); |
| 1442 | if (numargs < 2) { |
| 1443 | PyErr_SetString(PyExc_TypeError, |
| 1444 | "imap() must have at least two arguments."); |
| 1445 | return NULL; |
| 1446 | } |
| 1447 | |
| 1448 | iters = PyTuple_New(numargs-1); |
| 1449 | if (iters == NULL) |
| 1450 | return NULL; |
| 1451 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1452 | for (i=1 ; i<numargs ; i++) { |
| 1453 | /* Get iterator. */ |
| 1454 | it = PyObject_GetIter(PyTuple_GET_ITEM(args, i)); |
| 1455 | if (it == NULL) { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1456 | Py_DECREF(iters); |
| 1457 | return NULL; |
| 1458 | } |
| 1459 | PyTuple_SET_ITEM(iters, i-1, it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1460 | } |
| 1461 | |
| 1462 | /* create imapobject structure */ |
| 1463 | lz = (imapobject *)type->tp_alloc(type, 0); |
| 1464 | if (lz == NULL) { |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1465 | Py_DECREF(iters); |
| 1466 | return NULL; |
| 1467 | } |
| 1468 | lz->iters = iters; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1469 | func = PyTuple_GET_ITEM(args, 0); |
| 1470 | Py_INCREF(func); |
| 1471 | lz->func = func; |
| 1472 | |
| 1473 | return (PyObject *)lz; |
| 1474 | } |
| 1475 | |
| 1476 | static void |
| 1477 | imap_dealloc(imapobject *lz) |
| 1478 | { |
| 1479 | PyObject_GC_UnTrack(lz); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1480 | Py_XDECREF(lz->iters); |
| 1481 | Py_XDECREF(lz->func); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1482 | Py_TYPE(lz)->tp_free(lz); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1483 | } |
| 1484 | |
| 1485 | static int |
| 1486 | imap_traverse(imapobject *lz, visitproc visit, void *arg) |
| 1487 | { |
Raymond Hettinger | 58ed69b | 2004-07-15 05:32:47 +0000 | [diff] [blame] | 1488 | Py_VISIT(lz->iters); |
| 1489 | Py_VISIT(lz->func); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1490 | return 0; |
| 1491 | } |
| 1492 | |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1493 | /* |
| 1494 | imap() is an iterator version of __builtins__.map() except that it does |
| 1495 | not have the None fill-in feature. That was intentionally left out for |
| 1496 | the following reasons: |
| 1497 | |
| 1498 | 1) Itertools are designed to be easily combined and chained together. |
| 1499 | Having all tools stop with the shortest input is a unifying principle |
| 1500 | that makes it easier to combine finite iterators (supplying data) with |
| 1501 | infinite iterators like count() and repeat() (for supplying sequential |
| 1502 | or constant arguments to a function). |
| 1503 | |
| 1504 | 2) In typical use cases for combining itertools, having one finite data |
| 1505 | supplier run out before another is likely to be an error condition which |
| 1506 | should not pass silently by automatically supplying None. |
| 1507 | |
| 1508 | 3) The use cases for automatic None fill-in are rare -- not many functions |
| 1509 | do something useful when a parameter suddenly switches type and becomes |
| 1510 | None. |
| 1511 | |
| 1512 | 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] | 1513 | writing: chain(iterable, repeat(None)). |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1514 | |
| 1515 | 5) Similar toolsets in Haskell and SML do not have automatic None fill-in. |
| 1516 | */ |
| 1517 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1518 | static PyObject * |
| 1519 | imap_next(imapobject *lz) |
| 1520 | { |
| 1521 | PyObject *val; |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 1522 | PyObject *argtuple; |
| 1523 | PyObject *result; |
Martin v. Löwis | ad0a462 | 2006-02-16 14:30:23 +0000 | [diff] [blame] | 1524 | Py_ssize_t numargs, i; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1525 | |
| 1526 | numargs = PyTuple_Size(lz->iters); |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 1527 | argtuple = PyTuple_New(numargs); |
| 1528 | if (argtuple == NULL) |
| 1529 | return NULL; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1530 | |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 1531 | for (i=0 ; i<numargs ; i++) { |
| 1532 | val = PyIter_Next(PyTuple_GET_ITEM(lz->iters, i)); |
| 1533 | if (val == NULL) { |
| 1534 | Py_DECREF(argtuple); |
| 1535 | return NULL; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1536 | } |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 1537 | PyTuple_SET_ITEM(argtuple, i, val); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1538 | } |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 1539 | if (lz->func == Py_None) |
| 1540 | return argtuple; |
| 1541 | result = PyObject_Call(lz->func, argtuple, NULL); |
| 1542 | Py_DECREF(argtuple); |
| 1543 | return result; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1544 | } |
| 1545 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1546 | PyDoc_STRVAR(imap_doc, |
| 1547 | "imap(func, *iterables) --> imap object\n\ |
| 1548 | \n\ |
| 1549 | Make an iterator that computes the function using arguments from\n\ |
| 1550 | each of the iterables. Like map() except that it returns\n\ |
| 1551 | an iterator instead of a list and that it stops when the shortest\n\ |
| 1552 | iterable is exhausted instead of filling in None for shorter\n\ |
| 1553 | iterables."); |
| 1554 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1555 | static PyTypeObject imap_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 1556 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1557 | "itertools.imap", /* tp_name */ |
| 1558 | sizeof(imapobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1559 | 0, /* tp_itemsize */ |
| 1560 | /* methods */ |
| 1561 | (destructor)imap_dealloc, /* tp_dealloc */ |
| 1562 | 0, /* tp_print */ |
| 1563 | 0, /* tp_getattr */ |
| 1564 | 0, /* tp_setattr */ |
| 1565 | 0, /* tp_compare */ |
| 1566 | 0, /* tp_repr */ |
| 1567 | 0, /* tp_as_number */ |
| 1568 | 0, /* tp_as_sequence */ |
| 1569 | 0, /* tp_as_mapping */ |
| 1570 | 0, /* tp_hash */ |
| 1571 | 0, /* tp_call */ |
| 1572 | 0, /* tp_str */ |
| 1573 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 1574 | 0, /* tp_setattro */ |
| 1575 | 0, /* tp_as_buffer */ |
| 1576 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 1577 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| 1578 | imap_doc, /* tp_doc */ |
| 1579 | (traverseproc)imap_traverse, /* tp_traverse */ |
| 1580 | 0, /* tp_clear */ |
| 1581 | 0, /* tp_richcompare */ |
| 1582 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 1583 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1584 | (iternextfunc)imap_next, /* tp_iternext */ |
| 1585 | 0, /* tp_methods */ |
| 1586 | 0, /* tp_members */ |
| 1587 | 0, /* tp_getset */ |
| 1588 | 0, /* tp_base */ |
| 1589 | 0, /* tp_dict */ |
| 1590 | 0, /* tp_descr_get */ |
| 1591 | 0, /* tp_descr_set */ |
| 1592 | 0, /* tp_dictoffset */ |
| 1593 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 1594 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1595 | imap_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1596 | PyObject_GC_Del, /* tp_free */ |
| 1597 | }; |
| 1598 | |
| 1599 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1600 | /* chain object ************************************************************/ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1601 | |
| 1602 | typedef struct { |
| 1603 | PyObject_HEAD |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 1604 | Py_ssize_t tuplesize; |
| 1605 | Py_ssize_t iternum; /* which iterator is active */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1606 | PyObject *ittuple; /* tuple of iterators */ |
| 1607 | } chainobject; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1608 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1609 | static PyTypeObject chain_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1610 | |
| 1611 | static PyObject * |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1612 | chain_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1613 | { |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1614 | chainobject *lz; |
Martin v. Löwis | ad0a462 | 2006-02-16 14:30:23 +0000 | [diff] [blame] | 1615 | Py_ssize_t tuplesize = PySequence_Length(args); |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 1616 | Py_ssize_t i; |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1617 | PyObject *ittuple; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1618 | |
Georg Brandl | b84c137 | 2007-01-21 10:28:43 +0000 | [diff] [blame] | 1619 | if (type == &chain_type && !_PyArg_NoKeywords("chain()", kwds)) |
Georg Brandl | 02c4287 | 2005-08-26 06:42:30 +0000 | [diff] [blame] | 1620 | return NULL; |
| 1621 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1622 | /* obtain iterators */ |
| 1623 | assert(PyTuple_Check(args)); |
| 1624 | ittuple = PyTuple_New(tuplesize); |
Neal Norwitz | 2f3136b | 2006-05-27 05:18:57 +0000 | [diff] [blame] | 1625 | if (ittuple == NULL) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1626 | return NULL; |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1627 | for (i=0; i < tuplesize; ++i) { |
| 1628 | PyObject *item = PyTuple_GET_ITEM(args, i); |
| 1629 | PyObject *it = PyObject_GetIter(item); |
| 1630 | if (it == NULL) { |
| 1631 | if (PyErr_ExceptionMatches(PyExc_TypeError)) |
| 1632 | PyErr_Format(PyExc_TypeError, |
Neal Norwitz | 2f3136b | 2006-05-27 05:18:57 +0000 | [diff] [blame] | 1633 | "chain argument #%zd must support iteration", |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1634 | i+1); |
| 1635 | Py_DECREF(ittuple); |
| 1636 | return NULL; |
| 1637 | } |
| 1638 | PyTuple_SET_ITEM(ittuple, i, it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1639 | } |
| 1640 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1641 | /* create chainobject structure */ |
| 1642 | lz = (chainobject *)type->tp_alloc(type, 0); |
Raymond Hettinger | 7d98fb9 | 2003-06-17 23:14:40 +0000 | [diff] [blame] | 1643 | if (lz == NULL) { |
| 1644 | Py_DECREF(ittuple); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1645 | return NULL; |
Raymond Hettinger | 7d98fb9 | 2003-06-17 23:14:40 +0000 | [diff] [blame] | 1646 | } |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1647 | |
| 1648 | lz->ittuple = ittuple; |
| 1649 | lz->iternum = 0; |
| 1650 | lz->tuplesize = tuplesize; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1651 | |
| 1652 | return (PyObject *)lz; |
| 1653 | } |
| 1654 | |
| 1655 | static void |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1656 | chain_dealloc(chainobject *lz) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1657 | { |
| 1658 | PyObject_GC_UnTrack(lz); |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1659 | Py_XDECREF(lz->ittuple); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1660 | Py_TYPE(lz)->tp_free(lz); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1661 | } |
| 1662 | |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1663 | static int |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1664 | chain_traverse(chainobject *lz, visitproc visit, void *arg) |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1665 | { |
Raymond Hettinger | 58ed69b | 2004-07-15 05:32:47 +0000 | [diff] [blame] | 1666 | Py_VISIT(lz->ittuple); |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 1667 | return 0; |
| 1668 | } |
| 1669 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1670 | static PyObject * |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1671 | chain_next(chainobject *lz) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1672 | { |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1673 | PyObject *it; |
| 1674 | PyObject *item; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1675 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1676 | while (lz->iternum < lz->tuplesize) { |
| 1677 | it = PyTuple_GET_ITEM(lz->ittuple, lz->iternum); |
| 1678 | item = PyIter_Next(it); |
| 1679 | if (item != NULL) |
| 1680 | return item; |
Raymond Hettinger | 9d7c870 | 2004-05-08 19:49:42 +0000 | [diff] [blame] | 1681 | if (PyErr_Occurred()) { |
| 1682 | if (PyErr_ExceptionMatches(PyExc_StopIteration)) |
| 1683 | PyErr_Clear(); |
| 1684 | else |
| 1685 | return NULL; |
| 1686 | } |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1687 | lz->iternum++; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1688 | } |
| 1689 | return NULL; |
| 1690 | } |
| 1691 | |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1692 | PyDoc_STRVAR(chain_doc, |
| 1693 | "chain(*iterables) --> chain object\n\ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1694 | \n\ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1695 | Return a chain object whose .next() method returns elements from the\n\ |
| 1696 | first iterable until it is exhausted, then elements from the next\n\ |
| 1697 | iterable, until all of the iterables are exhausted."); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1698 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1699 | static PyTypeObject chain_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 1700 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1701 | "itertools.chain", /* tp_name */ |
| 1702 | sizeof(chainobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1703 | 0, /* tp_itemsize */ |
| 1704 | /* methods */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1705 | (destructor)chain_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1706 | 0, /* tp_print */ |
| 1707 | 0, /* tp_getattr */ |
| 1708 | 0, /* tp_setattr */ |
| 1709 | 0, /* tp_compare */ |
| 1710 | 0, /* tp_repr */ |
| 1711 | 0, /* tp_as_number */ |
| 1712 | 0, /* tp_as_sequence */ |
| 1713 | 0, /* tp_as_mapping */ |
| 1714 | 0, /* tp_hash */ |
| 1715 | 0, /* tp_call */ |
| 1716 | 0, /* tp_str */ |
| 1717 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 1718 | 0, /* tp_setattro */ |
| 1719 | 0, /* tp_as_buffer */ |
| 1720 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 1721 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1722 | chain_doc, /* tp_doc */ |
| 1723 | (traverseproc)chain_traverse, /* tp_traverse */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1724 | 0, /* tp_clear */ |
| 1725 | 0, /* tp_richcompare */ |
| 1726 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 1727 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1728 | (iternextfunc)chain_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1729 | 0, /* tp_methods */ |
| 1730 | 0, /* tp_members */ |
| 1731 | 0, /* tp_getset */ |
| 1732 | 0, /* tp_base */ |
| 1733 | 0, /* tp_dict */ |
| 1734 | 0, /* tp_descr_get */ |
| 1735 | 0, /* tp_descr_set */ |
| 1736 | 0, /* tp_dictoffset */ |
| 1737 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 1738 | 0, /* tp_alloc */ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 1739 | chain_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1740 | PyObject_GC_Del, /* tp_free */ |
| 1741 | }; |
| 1742 | |
| 1743 | |
Raymond Hettinger | 50986cc | 2008-02-22 03:16:42 +0000 | [diff] [blame] | 1744 | /* product object ************************************************************/ |
| 1745 | |
| 1746 | typedef struct { |
| 1747 | PyObject_HEAD |
| 1748 | PyObject *pools; /* tuple of pool tuples */ |
| 1749 | Py_ssize_t *maxvec; |
| 1750 | Py_ssize_t *indices; |
| 1751 | PyObject *result; |
| 1752 | int stopped; |
| 1753 | } productobject; |
| 1754 | |
| 1755 | static PyTypeObject product_type; |
| 1756 | |
| 1757 | static PyObject * |
| 1758 | product_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 1759 | { |
| 1760 | productobject *lz; |
| 1761 | Py_ssize_t npools; |
| 1762 | PyObject *pools = NULL; |
| 1763 | Py_ssize_t *maxvec = NULL; |
| 1764 | Py_ssize_t *indices = NULL; |
| 1765 | Py_ssize_t i; |
| 1766 | |
| 1767 | if (type == &product_type && !_PyArg_NoKeywords("product()", kwds)) |
| 1768 | return NULL; |
| 1769 | |
| 1770 | assert(PyTuple_Check(args)); |
| 1771 | npools = PyTuple_GET_SIZE(args); |
| 1772 | |
| 1773 | maxvec = PyMem_Malloc(npools * sizeof(Py_ssize_t)); |
| 1774 | indices = PyMem_Malloc(npools * sizeof(Py_ssize_t)); |
| 1775 | if (maxvec == NULL || indices == NULL) { |
| 1776 | PyErr_NoMemory(); |
| 1777 | goto error; |
| 1778 | } |
| 1779 | |
| 1780 | pools = PyTuple_New(npools); |
| 1781 | if (pools == NULL) |
| 1782 | goto error; |
| 1783 | |
| 1784 | for (i=0; i < npools; ++i) { |
| 1785 | PyObject *item = PyTuple_GET_ITEM(args, i); |
| 1786 | PyObject *pool = PySequence_Tuple(item); |
| 1787 | if (pool == NULL) |
| 1788 | goto error; |
| 1789 | |
| 1790 | PyTuple_SET_ITEM(pools, i, pool); |
| 1791 | maxvec[i] = PyTuple_GET_SIZE(pool); |
| 1792 | indices[i] = 0; |
| 1793 | } |
| 1794 | |
| 1795 | /* create productobject structure */ |
| 1796 | lz = (productobject *)type->tp_alloc(type, 0); |
| 1797 | if (lz == NULL) { |
| 1798 | Py_DECREF(pools); |
| 1799 | return NULL; |
| 1800 | } |
| 1801 | |
| 1802 | lz->pools = pools; |
| 1803 | lz->maxvec = maxvec; |
| 1804 | lz->indices = indices; |
| 1805 | lz->result = NULL; |
| 1806 | lz->stopped = 0; |
| 1807 | |
| 1808 | return (PyObject *)lz; |
| 1809 | |
| 1810 | error: |
| 1811 | if (maxvec != NULL) |
| 1812 | PyMem_Free(maxvec); |
| 1813 | if (indices != NULL) |
| 1814 | PyMem_Free(indices); |
| 1815 | Py_XDECREF(pools); |
| 1816 | return NULL; |
| 1817 | } |
| 1818 | |
| 1819 | static void |
| 1820 | product_dealloc(productobject *lz) |
| 1821 | { |
| 1822 | PyObject_GC_UnTrack(lz); |
| 1823 | Py_XDECREF(lz->pools); |
| 1824 | Py_XDECREF(lz->result); |
| 1825 | PyMem_Free(lz->maxvec); |
| 1826 | PyMem_Free(lz->indices); |
| 1827 | Py_TYPE(lz)->tp_free(lz); |
| 1828 | } |
| 1829 | |
| 1830 | static int |
| 1831 | product_traverse(productobject *lz, visitproc visit, void *arg) |
| 1832 | { |
| 1833 | Py_VISIT(lz->pools); |
| 1834 | Py_VISIT(lz->result); |
| 1835 | return 0; |
| 1836 | } |
| 1837 | |
| 1838 | static PyObject * |
| 1839 | product_next(productobject *lz) |
| 1840 | { |
| 1841 | PyObject *pool; |
| 1842 | PyObject *elem; |
| 1843 | PyObject *tuple_result; |
| 1844 | PyObject *pools = lz->pools; |
| 1845 | PyObject *result = lz->result; |
| 1846 | Py_ssize_t npools = PyTuple_GET_SIZE(pools); |
| 1847 | Py_ssize_t i; |
| 1848 | |
| 1849 | if (lz->stopped) |
| 1850 | return NULL; |
| 1851 | if (result == NULL) { |
| 1852 | if (npools == 0) |
| 1853 | goto empty; |
| 1854 | result = PyList_New(npools); |
| 1855 | if (result == NULL) |
| 1856 | goto empty; |
| 1857 | lz->result = result; |
| 1858 | for (i=0; i < npools; i++) { |
| 1859 | pool = PyTuple_GET_ITEM(pools, i); |
| 1860 | if (PyTuple_GET_SIZE(pool) == 0) |
| 1861 | goto empty; |
| 1862 | elem = PyTuple_GET_ITEM(pool, 0); |
| 1863 | Py_INCREF(elem); |
| 1864 | PyList_SET_ITEM(result, i, elem); |
| 1865 | } |
| 1866 | } else { |
| 1867 | Py_ssize_t *indices = lz->indices; |
| 1868 | Py_ssize_t *maxvec = lz->maxvec; |
| 1869 | for (i=npools-1 ; i >= 0 ; i--) { |
| 1870 | pool = PyTuple_GET_ITEM(pools, i); |
| 1871 | indices[i]++; |
| 1872 | if (indices[i] == maxvec[i]) { |
| 1873 | indices[i] = 0; |
| 1874 | elem = PyTuple_GET_ITEM(pool, 0); |
| 1875 | Py_INCREF(elem); |
| 1876 | PyList_SetItem(result, i, elem); |
| 1877 | } else { |
| 1878 | elem = PyTuple_GET_ITEM(pool, indices[i]); |
| 1879 | Py_INCREF(elem); |
| 1880 | PyList_SetItem(result, i, elem); |
| 1881 | break; |
| 1882 | } |
| 1883 | } |
| 1884 | if (i < 0) |
| 1885 | return NULL; |
| 1886 | } |
| 1887 | |
| 1888 | tuple_result = PySequence_Tuple(result); |
| 1889 | if (tuple_result == NULL) |
| 1890 | lz->stopped = 1; |
| 1891 | return tuple_result; |
| 1892 | |
| 1893 | empty: |
| 1894 | lz->stopped = 1; |
| 1895 | return NULL; |
| 1896 | } |
| 1897 | |
| 1898 | PyDoc_STRVAR(product_doc, |
| 1899 | "product(*iterables) --> product object\n\ |
| 1900 | \n\ |
| 1901 | Cartesian product of input interables. Equivalent to nested for-loops.\n\n\ |
| 1902 | For example, product(A, B) returns the same as: ((x,y) for x in A for y in B).\n\ |
| 1903 | The leftmost iterators are in the outermost for-loop, so the output tuples\n\ |
| 1904 | cycle in a manner similar to an odometer (with the rightmost element changing\n\ |
| 1905 | on every iteration).\n\n\ |
| 1906 | product('ab', range(3)) --> ('a',0) ('a',1) ('a',2) ('b',0) ('b',1) ('b',2)\n\ |
| 1907 | product((0,1), (0,1), (0,1)) --> (0,0,0) (0,0,1) (0,1,0) (0,1,1) (1,0,0) ..."); |
| 1908 | |
| 1909 | static PyTypeObject product_type = { |
| 1910 | PyVarObject_HEAD_INIT(NULL, 0) |
| 1911 | "itertools.product", /* tp_name */ |
| 1912 | sizeof(productobject), /* tp_basicsize */ |
| 1913 | 0, /* tp_itemsize */ |
| 1914 | /* methods */ |
| 1915 | (destructor)product_dealloc, /* tp_dealloc */ |
| 1916 | 0, /* tp_print */ |
| 1917 | 0, /* tp_getattr */ |
| 1918 | 0, /* tp_setattr */ |
| 1919 | 0, /* tp_compare */ |
| 1920 | 0, /* tp_repr */ |
| 1921 | 0, /* tp_as_number */ |
| 1922 | 0, /* tp_as_sequence */ |
| 1923 | 0, /* tp_as_mapping */ |
| 1924 | 0, /* tp_hash */ |
| 1925 | 0, /* tp_call */ |
| 1926 | 0, /* tp_str */ |
| 1927 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 1928 | 0, /* tp_setattro */ |
| 1929 | 0, /* tp_as_buffer */ |
| 1930 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 1931 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| 1932 | product_doc, /* tp_doc */ |
| 1933 | (traverseproc)product_traverse, /* tp_traverse */ |
| 1934 | 0, /* tp_clear */ |
| 1935 | 0, /* tp_richcompare */ |
| 1936 | 0, /* tp_weaklistoffset */ |
| 1937 | PyObject_SelfIter, /* tp_iter */ |
| 1938 | (iternextfunc)product_next, /* tp_iternext */ |
| 1939 | 0, /* tp_methods */ |
| 1940 | 0, /* tp_members */ |
| 1941 | 0, /* tp_getset */ |
| 1942 | 0, /* tp_base */ |
| 1943 | 0, /* tp_dict */ |
| 1944 | 0, /* tp_descr_get */ |
| 1945 | 0, /* tp_descr_set */ |
| 1946 | 0, /* tp_dictoffset */ |
| 1947 | 0, /* tp_init */ |
| 1948 | 0, /* tp_alloc */ |
| 1949 | product_new, /* tp_new */ |
| 1950 | PyObject_GC_Del, /* tp_free */ |
| 1951 | }; |
| 1952 | |
| 1953 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1954 | /* ifilter object ************************************************************/ |
| 1955 | |
| 1956 | typedef struct { |
| 1957 | PyObject_HEAD |
| 1958 | PyObject *func; |
| 1959 | PyObject *it; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1960 | } ifilterobject; |
| 1961 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 1962 | static PyTypeObject ifilter_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1963 | |
| 1964 | static PyObject * |
| 1965 | ifilter_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 1966 | { |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1967 | PyObject *func, *seq; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1968 | PyObject *it; |
| 1969 | ifilterobject *lz; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1970 | |
Georg Brandl | b84c137 | 2007-01-21 10:28:43 +0000 | [diff] [blame] | 1971 | if (type == &ifilter_type && !_PyArg_NoKeywords("ifilter()", kwds)) |
Georg Brandl | 02c4287 | 2005-08-26 06:42:30 +0000 | [diff] [blame] | 1972 | return NULL; |
| 1973 | |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 1974 | if (!PyArg_UnpackTuple(args, "ifilter", 2, 2, &func, &seq)) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1975 | return NULL; |
| 1976 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1977 | /* Get iterator. */ |
| 1978 | it = PyObject_GetIter(seq); |
| 1979 | if (it == NULL) |
| 1980 | return NULL; |
| 1981 | |
| 1982 | /* create ifilterobject structure */ |
| 1983 | lz = (ifilterobject *)type->tp_alloc(type, 0); |
| 1984 | if (lz == NULL) { |
| 1985 | Py_DECREF(it); |
| 1986 | return NULL; |
| 1987 | } |
| 1988 | Py_INCREF(func); |
| 1989 | lz->func = func; |
| 1990 | lz->it = it; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 1991 | |
| 1992 | return (PyObject *)lz; |
| 1993 | } |
| 1994 | |
| 1995 | static void |
| 1996 | ifilter_dealloc(ifilterobject *lz) |
| 1997 | { |
| 1998 | PyObject_GC_UnTrack(lz); |
| 1999 | Py_XDECREF(lz->func); |
| 2000 | Py_XDECREF(lz->it); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2001 | Py_TYPE(lz)->tp_free(lz); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2002 | } |
| 2003 | |
| 2004 | static int |
| 2005 | ifilter_traverse(ifilterobject *lz, visitproc visit, void *arg) |
| 2006 | { |
Raymond Hettinger | 58ed69b | 2004-07-15 05:32:47 +0000 | [diff] [blame] | 2007 | Py_VISIT(lz->it); |
| 2008 | Py_VISIT(lz->func); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2009 | return 0; |
| 2010 | } |
| 2011 | |
| 2012 | static PyObject * |
| 2013 | ifilter_next(ifilterobject *lz) |
| 2014 | { |
| 2015 | PyObject *item; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 2016 | PyObject *it = lz->it; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2017 | long ok; |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 2018 | PyObject *(*iternext)(PyObject *); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2019 | |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 2020 | assert(PyIter_Check(it)); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2021 | iternext = *Py_TYPE(it)->tp_iternext; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2022 | for (;;) { |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 2023 | item = iternext(it); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2024 | if (item == NULL) |
| 2025 | return NULL; |
| 2026 | |
| 2027 | if (lz->func == Py_None) { |
| 2028 | ok = PyObject_IsTrue(item); |
| 2029 | } else { |
| 2030 | PyObject *good; |
| 2031 | good = PyObject_CallFunctionObjArgs(lz->func, |
| 2032 | item, NULL); |
| 2033 | if (good == NULL) { |
| 2034 | Py_DECREF(item); |
| 2035 | return NULL; |
| 2036 | } |
| 2037 | ok = PyObject_IsTrue(good); |
| 2038 | Py_DECREF(good); |
| 2039 | } |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2040 | if (ok) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2041 | return item; |
| 2042 | Py_DECREF(item); |
| 2043 | } |
| 2044 | } |
| 2045 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2046 | PyDoc_STRVAR(ifilter_doc, |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2047 | "ifilter(function or None, sequence) --> ifilter object\n\ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2048 | \n\ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2049 | Return those items of sequence for which function(item) is true.\n\ |
| 2050 | If function is None, return the items that are true."); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2051 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2052 | static PyTypeObject ifilter_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 2053 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2054 | "itertools.ifilter", /* tp_name */ |
| 2055 | sizeof(ifilterobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2056 | 0, /* tp_itemsize */ |
| 2057 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2058 | (destructor)ifilter_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2059 | 0, /* tp_print */ |
| 2060 | 0, /* tp_getattr */ |
| 2061 | 0, /* tp_setattr */ |
| 2062 | 0, /* tp_compare */ |
| 2063 | 0, /* tp_repr */ |
| 2064 | 0, /* tp_as_number */ |
| 2065 | 0, /* tp_as_sequence */ |
| 2066 | 0, /* tp_as_mapping */ |
| 2067 | 0, /* tp_hash */ |
| 2068 | 0, /* tp_call */ |
| 2069 | 0, /* tp_str */ |
| 2070 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 2071 | 0, /* tp_setattro */ |
| 2072 | 0, /* tp_as_buffer */ |
| 2073 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 2074 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2075 | ifilter_doc, /* tp_doc */ |
| 2076 | (traverseproc)ifilter_traverse, /* tp_traverse */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2077 | 0, /* tp_clear */ |
| 2078 | 0, /* tp_richcompare */ |
| 2079 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 2080 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2081 | (iternextfunc)ifilter_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2082 | 0, /* tp_methods */ |
| 2083 | 0, /* tp_members */ |
| 2084 | 0, /* tp_getset */ |
| 2085 | 0, /* tp_base */ |
| 2086 | 0, /* tp_dict */ |
| 2087 | 0, /* tp_descr_get */ |
| 2088 | 0, /* tp_descr_set */ |
| 2089 | 0, /* tp_dictoffset */ |
| 2090 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 2091 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2092 | ifilter_new, /* tp_new */ |
| 2093 | PyObject_GC_Del, /* tp_free */ |
| 2094 | }; |
| 2095 | |
| 2096 | |
| 2097 | /* ifilterfalse object ************************************************************/ |
| 2098 | |
| 2099 | typedef struct { |
| 2100 | PyObject_HEAD |
| 2101 | PyObject *func; |
| 2102 | PyObject *it; |
| 2103 | } ifilterfalseobject; |
| 2104 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2105 | static PyTypeObject ifilterfalse_type; |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2106 | |
| 2107 | static PyObject * |
| 2108 | ifilterfalse_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 2109 | { |
Guido van Rossum | d58f3fc | 2003-02-09 17:19:18 +0000 | [diff] [blame] | 2110 | PyObject *func, *seq; |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2111 | PyObject *it; |
| 2112 | ifilterfalseobject *lz; |
| 2113 | |
Georg Brandl | b84c137 | 2007-01-21 10:28:43 +0000 | [diff] [blame] | 2114 | if (type == &ifilterfalse_type && |
| 2115 | !_PyArg_NoKeywords("ifilterfalse()", kwds)) |
Georg Brandl | 02c4287 | 2005-08-26 06:42:30 +0000 | [diff] [blame] | 2116 | return NULL; |
| 2117 | |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2118 | if (!PyArg_UnpackTuple(args, "ifilterfalse", 2, 2, &func, &seq)) |
| 2119 | return NULL; |
| 2120 | |
| 2121 | /* Get iterator. */ |
| 2122 | it = PyObject_GetIter(seq); |
| 2123 | if (it == NULL) |
| 2124 | return NULL; |
| 2125 | |
| 2126 | /* create ifilterfalseobject structure */ |
| 2127 | lz = (ifilterfalseobject *)type->tp_alloc(type, 0); |
| 2128 | if (lz == NULL) { |
| 2129 | Py_DECREF(it); |
| 2130 | return NULL; |
| 2131 | } |
| 2132 | Py_INCREF(func); |
| 2133 | lz->func = func; |
| 2134 | lz->it = it; |
| 2135 | |
| 2136 | return (PyObject *)lz; |
| 2137 | } |
| 2138 | |
| 2139 | static void |
| 2140 | ifilterfalse_dealloc(ifilterfalseobject *lz) |
| 2141 | { |
| 2142 | PyObject_GC_UnTrack(lz); |
| 2143 | Py_XDECREF(lz->func); |
| 2144 | Py_XDECREF(lz->it); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2145 | Py_TYPE(lz)->tp_free(lz); |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2146 | } |
| 2147 | |
| 2148 | static int |
| 2149 | ifilterfalse_traverse(ifilterfalseobject *lz, visitproc visit, void *arg) |
| 2150 | { |
Raymond Hettinger | 58ed69b | 2004-07-15 05:32:47 +0000 | [diff] [blame] | 2151 | Py_VISIT(lz->it); |
| 2152 | Py_VISIT(lz->func); |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2153 | return 0; |
| 2154 | } |
| 2155 | |
| 2156 | static PyObject * |
| 2157 | ifilterfalse_next(ifilterfalseobject *lz) |
| 2158 | { |
| 2159 | PyObject *item; |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 2160 | PyObject *it = lz->it; |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2161 | long ok; |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 2162 | PyObject *(*iternext)(PyObject *); |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2163 | |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 2164 | assert(PyIter_Check(it)); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2165 | iternext = *Py_TYPE(it)->tp_iternext; |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2166 | for (;;) { |
Raymond Hettinger | 0faa1ca | 2004-03-17 04:27:44 +0000 | [diff] [blame] | 2167 | item = iternext(it); |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2168 | if (item == NULL) |
| 2169 | return NULL; |
| 2170 | |
| 2171 | if (lz->func == Py_None) { |
| 2172 | ok = PyObject_IsTrue(item); |
| 2173 | } else { |
| 2174 | PyObject *good; |
| 2175 | good = PyObject_CallFunctionObjArgs(lz->func, |
| 2176 | item, NULL); |
| 2177 | if (good == NULL) { |
| 2178 | Py_DECREF(item); |
| 2179 | return NULL; |
| 2180 | } |
| 2181 | ok = PyObject_IsTrue(good); |
| 2182 | Py_DECREF(good); |
| 2183 | } |
| 2184 | if (!ok) |
| 2185 | return item; |
| 2186 | Py_DECREF(item); |
| 2187 | } |
| 2188 | } |
| 2189 | |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2190 | PyDoc_STRVAR(ifilterfalse_doc, |
| 2191 | "ifilterfalse(function or None, sequence) --> ifilterfalse object\n\ |
| 2192 | \n\ |
| 2193 | Return those items of sequence for which function(item) is false.\n\ |
| 2194 | If function is None, return the items that are false."); |
| 2195 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2196 | static PyTypeObject ifilterfalse_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 2197 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2198 | "itertools.ifilterfalse", /* tp_name */ |
| 2199 | sizeof(ifilterfalseobject), /* tp_basicsize */ |
| 2200 | 0, /* tp_itemsize */ |
| 2201 | /* methods */ |
| 2202 | (destructor)ifilterfalse_dealloc, /* tp_dealloc */ |
| 2203 | 0, /* tp_print */ |
| 2204 | 0, /* tp_getattr */ |
| 2205 | 0, /* tp_setattr */ |
| 2206 | 0, /* tp_compare */ |
| 2207 | 0, /* tp_repr */ |
| 2208 | 0, /* tp_as_number */ |
| 2209 | 0, /* tp_as_sequence */ |
| 2210 | 0, /* tp_as_mapping */ |
| 2211 | 0, /* tp_hash */ |
| 2212 | 0, /* tp_call */ |
| 2213 | 0, /* tp_str */ |
| 2214 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 2215 | 0, /* tp_setattro */ |
| 2216 | 0, /* tp_as_buffer */ |
| 2217 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 2218 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| 2219 | ifilterfalse_doc, /* tp_doc */ |
| 2220 | (traverseproc)ifilterfalse_traverse, /* tp_traverse */ |
| 2221 | 0, /* tp_clear */ |
| 2222 | 0, /* tp_richcompare */ |
| 2223 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 2224 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2225 | (iternextfunc)ifilterfalse_next, /* tp_iternext */ |
| 2226 | 0, /* tp_methods */ |
| 2227 | 0, /* tp_members */ |
| 2228 | 0, /* tp_getset */ |
| 2229 | 0, /* tp_base */ |
| 2230 | 0, /* tp_dict */ |
| 2231 | 0, /* tp_descr_get */ |
| 2232 | 0, /* tp_descr_set */ |
| 2233 | 0, /* tp_dictoffset */ |
| 2234 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 2235 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2236 | ifilterfalse_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2237 | PyObject_GC_Del, /* tp_free */ |
| 2238 | }; |
| 2239 | |
| 2240 | |
| 2241 | /* count object ************************************************************/ |
| 2242 | |
| 2243 | typedef struct { |
| 2244 | PyObject_HEAD |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 2245 | Py_ssize_t cnt; |
Raymond Hettinger | 50e90e2 | 2007-10-04 00:20:27 +0000 | [diff] [blame] | 2246 | PyObject *long_cnt; /* Arbitrarily large count when cnt >= PY_SSIZE_T_MAX */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2247 | } countobject; |
| 2248 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2249 | static PyTypeObject count_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2250 | |
| 2251 | static PyObject * |
| 2252 | count_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 2253 | { |
| 2254 | countobject *lz; |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 2255 | Py_ssize_t cnt = 0; |
Raymond Hettinger | 50e90e2 | 2007-10-04 00:20:27 +0000 | [diff] [blame] | 2256 | PyObject *cnt_arg = NULL; |
| 2257 | PyObject *long_cnt = NULL; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2258 | |
Georg Brandl | b84c137 | 2007-01-21 10:28:43 +0000 | [diff] [blame] | 2259 | if (type == &count_type && !_PyArg_NoKeywords("count()", kwds)) |
Georg Brandl | 02c4287 | 2005-08-26 06:42:30 +0000 | [diff] [blame] | 2260 | return NULL; |
| 2261 | |
Raymond Hettinger | 50e90e2 | 2007-10-04 00:20:27 +0000 | [diff] [blame] | 2262 | if (!PyArg_UnpackTuple(args, "count", 0, 1, &cnt_arg)) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2263 | return NULL; |
| 2264 | |
Raymond Hettinger | 50e90e2 | 2007-10-04 00:20:27 +0000 | [diff] [blame] | 2265 | if (cnt_arg != NULL) { |
| 2266 | cnt = PyInt_AsSsize_t(cnt_arg); |
| 2267 | if (cnt == -1 && PyErr_Occurred()) { |
| 2268 | PyErr_Clear(); |
| 2269 | if (!PyLong_Check(cnt_arg)) { |
| 2270 | PyErr_SetString(PyExc_TypeError, "an integer is required"); |
| 2271 | return NULL; |
| 2272 | } |
| 2273 | long_cnt = cnt_arg; |
| 2274 | Py_INCREF(long_cnt); |
| 2275 | cnt = PY_SSIZE_T_MAX; |
| 2276 | } |
| 2277 | } |
| 2278 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2279 | /* create countobject structure */ |
| 2280 | lz = (countobject *)PyObject_New(countobject, &count_type); |
Raymond Hettinger | 50e90e2 | 2007-10-04 00:20:27 +0000 | [diff] [blame] | 2281 | if (lz == NULL) { |
| 2282 | Py_XDECREF(long_cnt); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2283 | return NULL; |
Raymond Hettinger | 50e90e2 | 2007-10-04 00:20:27 +0000 | [diff] [blame] | 2284 | } |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2285 | lz->cnt = cnt; |
Raymond Hettinger | 50e90e2 | 2007-10-04 00:20:27 +0000 | [diff] [blame] | 2286 | lz->long_cnt = long_cnt; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2287 | |
| 2288 | return (PyObject *)lz; |
| 2289 | } |
| 2290 | |
Raymond Hettinger | 50e90e2 | 2007-10-04 00:20:27 +0000 | [diff] [blame] | 2291 | static void |
| 2292 | count_dealloc(countobject *lz) |
| 2293 | { |
| 2294 | Py_XDECREF(lz->long_cnt); |
| 2295 | PyObject_Del(lz); |
| 2296 | } |
| 2297 | |
| 2298 | static PyObject * |
| 2299 | count_nextlong(countobject *lz) |
| 2300 | { |
| 2301 | static PyObject *one = NULL; |
| 2302 | PyObject *cnt; |
| 2303 | PyObject *stepped_up; |
| 2304 | |
| 2305 | if (lz->long_cnt == NULL) { |
| 2306 | lz->long_cnt = PyInt_FromSsize_t(PY_SSIZE_T_MAX); |
| 2307 | if (lz->long_cnt == NULL) |
| 2308 | return NULL; |
| 2309 | } |
| 2310 | if (one == NULL) { |
| 2311 | one = PyInt_FromLong(1); |
| 2312 | if (one == NULL) |
| 2313 | return NULL; |
| 2314 | } |
| 2315 | cnt = lz->long_cnt; |
| 2316 | assert(cnt != NULL); |
| 2317 | stepped_up = PyNumber_Add(cnt, one); |
| 2318 | if (stepped_up == NULL) |
| 2319 | return NULL; |
| 2320 | lz->long_cnt = stepped_up; |
| 2321 | return cnt; |
| 2322 | } |
| 2323 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2324 | static PyObject * |
| 2325 | count_next(countobject *lz) |
| 2326 | { |
Raymond Hettinger | 50e90e2 | 2007-10-04 00:20:27 +0000 | [diff] [blame] | 2327 | if (lz->cnt == PY_SSIZE_T_MAX) |
| 2328 | return count_nextlong(lz); |
Jack Diederich | 36234e8 | 2006-09-21 17:50:26 +0000 | [diff] [blame] | 2329 | return PyInt_FromSsize_t(lz->cnt++); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2330 | } |
| 2331 | |
Raymond Hettinger | 7dacda2 | 2004-04-08 21:54:00 +0000 | [diff] [blame] | 2332 | static PyObject * |
| 2333 | count_repr(countobject *lz) |
| 2334 | { |
Raymond Hettinger | 50e90e2 | 2007-10-04 00:20:27 +0000 | [diff] [blame] | 2335 | PyObject *cnt_repr; |
| 2336 | PyObject *result; |
| 2337 | |
| 2338 | if (lz->cnt != PY_SSIZE_T_MAX) |
| 2339 | return PyString_FromFormat("count(%zd)", lz->cnt); |
| 2340 | |
| 2341 | cnt_repr = PyObject_Repr(lz->long_cnt); |
| 2342 | if (cnt_repr == NULL) |
| 2343 | return NULL; |
| 2344 | result = PyString_FromFormat("count(%s)", PyString_AS_STRING(cnt_repr)); |
| 2345 | Py_DECREF(cnt_repr); |
| 2346 | return result; |
Raymond Hettinger | 7dacda2 | 2004-04-08 21:54:00 +0000 | [diff] [blame] | 2347 | } |
| 2348 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2349 | PyDoc_STRVAR(count_doc, |
| 2350 | "count([firstval]) --> count object\n\ |
| 2351 | \n\ |
| 2352 | Return a count object whose .next() method returns consecutive\n\ |
| 2353 | integers starting from zero or, if specified, from firstval."); |
| 2354 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2355 | static PyTypeObject count_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 2356 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2357 | "itertools.count", /* tp_name */ |
| 2358 | sizeof(countobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2359 | 0, /* tp_itemsize */ |
| 2360 | /* methods */ |
Raymond Hettinger | 50e90e2 | 2007-10-04 00:20:27 +0000 | [diff] [blame] | 2361 | (destructor)count_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2362 | 0, /* tp_print */ |
| 2363 | 0, /* tp_getattr */ |
| 2364 | 0, /* tp_setattr */ |
| 2365 | 0, /* tp_compare */ |
Raymond Hettinger | 7dacda2 | 2004-04-08 21:54:00 +0000 | [diff] [blame] | 2366 | (reprfunc)count_repr, /* tp_repr */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2367 | 0, /* tp_as_number */ |
| 2368 | 0, /* tp_as_sequence */ |
| 2369 | 0, /* tp_as_mapping */ |
| 2370 | 0, /* tp_hash */ |
| 2371 | 0, /* tp_call */ |
| 2372 | 0, /* tp_str */ |
| 2373 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 2374 | 0, /* tp_setattro */ |
| 2375 | 0, /* tp_as_buffer */ |
| 2376 | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2377 | count_doc, /* tp_doc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2378 | 0, /* tp_traverse */ |
| 2379 | 0, /* tp_clear */ |
| 2380 | 0, /* tp_richcompare */ |
| 2381 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 2382 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2383 | (iternextfunc)count_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2384 | 0, /* tp_methods */ |
| 2385 | 0, /* tp_members */ |
| 2386 | 0, /* tp_getset */ |
| 2387 | 0, /* tp_base */ |
| 2388 | 0, /* tp_dict */ |
| 2389 | 0, /* tp_descr_get */ |
| 2390 | 0, /* tp_descr_set */ |
| 2391 | 0, /* tp_dictoffset */ |
| 2392 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 2393 | 0, /* tp_alloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2394 | count_new, /* tp_new */ |
| 2395 | }; |
| 2396 | |
| 2397 | |
| 2398 | /* izip object ************************************************************/ |
| 2399 | |
| 2400 | #include "Python.h" |
| 2401 | |
| 2402 | typedef struct { |
| 2403 | PyObject_HEAD |
Martin v. Löwis | ad0a462 | 2006-02-16 14:30:23 +0000 | [diff] [blame] | 2404 | Py_ssize_t tuplesize; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2405 | PyObject *ittuple; /* tuple of iterators */ |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2406 | PyObject *result; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2407 | } izipobject; |
| 2408 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2409 | static PyTypeObject izip_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2410 | |
| 2411 | static PyObject * |
| 2412 | izip_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 2413 | { |
| 2414 | izipobject *lz; |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 2415 | Py_ssize_t i; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2416 | PyObject *ittuple; /* tuple of iterators */ |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2417 | PyObject *result; |
Martin v. Löwis | ad0a462 | 2006-02-16 14:30:23 +0000 | [diff] [blame] | 2418 | Py_ssize_t tuplesize = PySequence_Length(args); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2419 | |
Georg Brandl | b84c137 | 2007-01-21 10:28:43 +0000 | [diff] [blame] | 2420 | if (type == &izip_type && !_PyArg_NoKeywords("izip()", kwds)) |
Georg Brandl | 02c4287 | 2005-08-26 06:42:30 +0000 | [diff] [blame] | 2421 | return NULL; |
| 2422 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2423 | /* args must be a tuple */ |
| 2424 | assert(PyTuple_Check(args)); |
| 2425 | |
| 2426 | /* obtain iterators */ |
| 2427 | ittuple = PyTuple_New(tuplesize); |
Neal Norwitz | 2f3136b | 2006-05-27 05:18:57 +0000 | [diff] [blame] | 2428 | if (ittuple == NULL) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2429 | return NULL; |
| 2430 | for (i=0; i < tuplesize; ++i) { |
| 2431 | PyObject *item = PyTuple_GET_ITEM(args, i); |
| 2432 | PyObject *it = PyObject_GetIter(item); |
| 2433 | if (it == NULL) { |
| 2434 | if (PyErr_ExceptionMatches(PyExc_TypeError)) |
| 2435 | PyErr_Format(PyExc_TypeError, |
Neal Norwitz | 2f3136b | 2006-05-27 05:18:57 +0000 | [diff] [blame] | 2436 | "izip argument #%zd must support iteration", |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2437 | i+1); |
| 2438 | Py_DECREF(ittuple); |
| 2439 | return NULL; |
| 2440 | } |
| 2441 | PyTuple_SET_ITEM(ittuple, i, it); |
| 2442 | } |
| 2443 | |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2444 | /* create a result holder */ |
| 2445 | result = PyTuple_New(tuplesize); |
| 2446 | if (result == NULL) { |
| 2447 | Py_DECREF(ittuple); |
| 2448 | return NULL; |
| 2449 | } |
| 2450 | for (i=0 ; i < tuplesize ; i++) { |
| 2451 | Py_INCREF(Py_None); |
| 2452 | PyTuple_SET_ITEM(result, i, Py_None); |
| 2453 | } |
| 2454 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2455 | /* create izipobject structure */ |
| 2456 | lz = (izipobject *)type->tp_alloc(type, 0); |
| 2457 | if (lz == NULL) { |
| 2458 | Py_DECREF(ittuple); |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2459 | Py_DECREF(result); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2460 | return NULL; |
| 2461 | } |
| 2462 | lz->ittuple = ittuple; |
| 2463 | lz->tuplesize = tuplesize; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2464 | lz->result = result; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2465 | |
| 2466 | return (PyObject *)lz; |
| 2467 | } |
| 2468 | |
| 2469 | static void |
| 2470 | izip_dealloc(izipobject *lz) |
| 2471 | { |
| 2472 | PyObject_GC_UnTrack(lz); |
| 2473 | Py_XDECREF(lz->ittuple); |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2474 | Py_XDECREF(lz->result); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2475 | Py_TYPE(lz)->tp_free(lz); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2476 | } |
| 2477 | |
| 2478 | static int |
| 2479 | izip_traverse(izipobject *lz, visitproc visit, void *arg) |
| 2480 | { |
Raymond Hettinger | 58ed69b | 2004-07-15 05:32:47 +0000 | [diff] [blame] | 2481 | Py_VISIT(lz->ittuple); |
| 2482 | Py_VISIT(lz->result); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2483 | return 0; |
| 2484 | } |
| 2485 | |
| 2486 | static PyObject * |
| 2487 | izip_next(izipobject *lz) |
| 2488 | { |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 2489 | Py_ssize_t i; |
Martin v. Löwis | ad0a462 | 2006-02-16 14:30:23 +0000 | [diff] [blame] | 2490 | Py_ssize_t tuplesize = lz->tuplesize; |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2491 | PyObject *result = lz->result; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2492 | PyObject *it; |
| 2493 | PyObject *item; |
Raymond Hettinger | 4f01f89 | 2003-08-30 00:10:06 +0000 | [diff] [blame] | 2494 | PyObject *olditem; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2495 | |
Raymond Hettinger | b5a4208 | 2003-08-08 05:10:41 +0000 | [diff] [blame] | 2496 | if (tuplesize == 0) |
| 2497 | return NULL; |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2498 | if (Py_REFCNT(result) == 1) { |
Raymond Hettinger | a56f6b6 | 2003-08-29 23:09:58 +0000 | [diff] [blame] | 2499 | Py_INCREF(result); |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2500 | for (i=0 ; i < tuplesize ; i++) { |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 2501 | it = PyTuple_GET_ITEM(lz->ittuple, i); |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 2502 | assert(PyIter_Check(it)); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2503 | item = (*Py_TYPE(it)->tp_iternext)(it); |
Raymond Hettinger | a56f6b6 | 2003-08-29 23:09:58 +0000 | [diff] [blame] | 2504 | if (item == NULL) { |
| 2505 | Py_DECREF(result); |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 2506 | return NULL; |
Raymond Hettinger | a56f6b6 | 2003-08-29 23:09:58 +0000 | [diff] [blame] | 2507 | } |
Raymond Hettinger | 4f01f89 | 2003-08-30 00:10:06 +0000 | [diff] [blame] | 2508 | olditem = PyTuple_GET_ITEM(result, i); |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 2509 | PyTuple_SET_ITEM(result, i, item); |
Raymond Hettinger | 4f01f89 | 2003-08-30 00:10:06 +0000 | [diff] [blame] | 2510 | Py_DECREF(olditem); |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2511 | } |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2512 | } else { |
Raymond Hettinger | 2012f17 | 2003-02-07 05:32:58 +0000 | [diff] [blame] | 2513 | result = PyTuple_New(tuplesize); |
| 2514 | if (result == NULL) |
| 2515 | return NULL; |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 2516 | for (i=0 ; i < tuplesize ; i++) { |
| 2517 | it = PyTuple_GET_ITEM(lz->ittuple, i); |
Raymond Hettinger | d1a283b | 2003-03-01 01:48:24 +0000 | [diff] [blame] | 2518 | assert(PyIter_Check(it)); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2519 | item = (*Py_TYPE(it)->tp_iternext)(it); |
Raymond Hettinger | f0c0024 | 2003-02-07 07:26:25 +0000 | [diff] [blame] | 2520 | if (item == NULL) { |
| 2521 | Py_DECREF(result); |
| 2522 | return NULL; |
| 2523 | } |
| 2524 | PyTuple_SET_ITEM(result, i, item); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2525 | } |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2526 | } |
| 2527 | return result; |
| 2528 | } |
| 2529 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2530 | PyDoc_STRVAR(izip_doc, |
| 2531 | "izip(iter1 [,iter2 [...]]) --> izip object\n\ |
| 2532 | \n\ |
| 2533 | Return a izip object whose .next() method returns a tuple where\n\ |
| 2534 | the i-th element comes from the i-th iterable argument. The .next()\n\ |
| 2535 | method continues until the shortest iterable in the argument sequence\n\ |
| 2536 | is exhausted and then it raises StopIteration. Works like the zip()\n\ |
| 2537 | function but consumes less memory by returning an iterator instead of\n\ |
| 2538 | a list."); |
| 2539 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2540 | static PyTypeObject izip_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 2541 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2542 | "itertools.izip", /* tp_name */ |
| 2543 | sizeof(izipobject), /* tp_basicsize */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2544 | 0, /* tp_itemsize */ |
| 2545 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2546 | (destructor)izip_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2547 | 0, /* tp_print */ |
| 2548 | 0, /* tp_getattr */ |
| 2549 | 0, /* tp_setattr */ |
| 2550 | 0, /* tp_compare */ |
| 2551 | 0, /* tp_repr */ |
| 2552 | 0, /* tp_as_number */ |
| 2553 | 0, /* tp_as_sequence */ |
| 2554 | 0, /* tp_as_mapping */ |
| 2555 | 0, /* tp_hash */ |
| 2556 | 0, /* tp_call */ |
| 2557 | 0, /* tp_str */ |
| 2558 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 2559 | 0, /* tp_setattro */ |
| 2560 | 0, /* tp_as_buffer */ |
| 2561 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 2562 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2563 | izip_doc, /* tp_doc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2564 | (traverseproc)izip_traverse, /* tp_traverse */ |
| 2565 | 0, /* tp_clear */ |
| 2566 | 0, /* tp_richcompare */ |
| 2567 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 2568 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2569 | (iternextfunc)izip_next, /* tp_iternext */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2570 | 0, /* tp_methods */ |
| 2571 | 0, /* tp_members */ |
| 2572 | 0, /* tp_getset */ |
| 2573 | 0, /* tp_base */ |
| 2574 | 0, /* tp_dict */ |
| 2575 | 0, /* tp_descr_get */ |
| 2576 | 0, /* tp_descr_set */ |
| 2577 | 0, /* tp_dictoffset */ |
| 2578 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 2579 | 0, /* tp_alloc */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2580 | izip_new, /* tp_new */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2581 | PyObject_GC_Del, /* tp_free */ |
| 2582 | }; |
| 2583 | |
| 2584 | |
| 2585 | /* repeat object ************************************************************/ |
| 2586 | |
| 2587 | typedef struct { |
| 2588 | PyObject_HEAD |
| 2589 | PyObject *element; |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 2590 | Py_ssize_t cnt; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2591 | } repeatobject; |
| 2592 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2593 | static PyTypeObject repeat_type; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2594 | |
| 2595 | static PyObject * |
| 2596 | repeat_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 2597 | { |
| 2598 | repeatobject *ro; |
| 2599 | PyObject *element; |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 2600 | Py_ssize_t cnt = -1; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2601 | |
Georg Brandl | b84c137 | 2007-01-21 10:28:43 +0000 | [diff] [blame] | 2602 | if (type == &repeat_type && !_PyArg_NoKeywords("repeat()", kwds)) |
Georg Brandl | 02c4287 | 2005-08-26 06:42:30 +0000 | [diff] [blame] | 2603 | return NULL; |
| 2604 | |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 2605 | if (!PyArg_ParseTuple(args, "O|n:repeat", &element, &cnt)) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2606 | return NULL; |
| 2607 | |
Raymond Hettinger | 7c2bb5b | 2003-05-03 05:59:48 +0000 | [diff] [blame] | 2608 | if (PyTuple_Size(args) == 2 && cnt < 0) |
| 2609 | cnt = 0; |
| 2610 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2611 | ro = (repeatobject *)type->tp_alloc(type, 0); |
| 2612 | if (ro == NULL) |
| 2613 | return NULL; |
| 2614 | Py_INCREF(element); |
| 2615 | ro->element = element; |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2616 | ro->cnt = cnt; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2617 | return (PyObject *)ro; |
| 2618 | } |
| 2619 | |
| 2620 | static void |
| 2621 | repeat_dealloc(repeatobject *ro) |
| 2622 | { |
| 2623 | PyObject_GC_UnTrack(ro); |
| 2624 | Py_XDECREF(ro->element); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2625 | Py_TYPE(ro)->tp_free(ro); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2626 | } |
| 2627 | |
| 2628 | static int |
| 2629 | repeat_traverse(repeatobject *ro, visitproc visit, void *arg) |
| 2630 | { |
Raymond Hettinger | 58ed69b | 2004-07-15 05:32:47 +0000 | [diff] [blame] | 2631 | Py_VISIT(ro->element); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2632 | return 0; |
| 2633 | } |
| 2634 | |
| 2635 | static PyObject * |
| 2636 | repeat_next(repeatobject *ro) |
| 2637 | { |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2638 | if (ro->cnt == 0) |
| 2639 | return NULL; |
| 2640 | if (ro->cnt > 0) |
| 2641 | ro->cnt--; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2642 | Py_INCREF(ro->element); |
| 2643 | return ro->element; |
| 2644 | } |
| 2645 | |
Raymond Hettinger | 7dacda2 | 2004-04-08 21:54:00 +0000 | [diff] [blame] | 2646 | static PyObject * |
| 2647 | repeat_repr(repeatobject *ro) |
| 2648 | { |
| 2649 | PyObject *result, *objrepr; |
| 2650 | |
| 2651 | objrepr = PyObject_Repr(ro->element); |
| 2652 | if (objrepr == NULL) |
| 2653 | return NULL; |
| 2654 | |
| 2655 | if (ro->cnt == -1) |
| 2656 | result = PyString_FromFormat("repeat(%s)", |
| 2657 | PyString_AS_STRING(objrepr)); |
| 2658 | else |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 2659 | result = PyString_FromFormat("repeat(%s, %zd)", |
Raymond Hettinger | 7dacda2 | 2004-04-08 21:54:00 +0000 | [diff] [blame] | 2660 | PyString_AS_STRING(objrepr), ro->cnt); |
| 2661 | Py_DECREF(objrepr); |
| 2662 | return result; |
| 2663 | } |
| 2664 | |
Raymond Hettinger | 6b27cda | 2005-09-24 21:23:05 +0000 | [diff] [blame] | 2665 | static PyObject * |
Raymond Hettinger | 5cab2e3 | 2004-02-10 09:25:40 +0000 | [diff] [blame] | 2666 | repeat_len(repeatobject *ro) |
| 2667 | { |
Raymond Hettinger | 6b27cda | 2005-09-24 21:23:05 +0000 | [diff] [blame] | 2668 | if (ro->cnt == -1) { |
Raymond Hettinger | 5cab2e3 | 2004-02-10 09:25:40 +0000 | [diff] [blame] | 2669 | PyErr_SetString(PyExc_TypeError, "len() of unsized object"); |
Raymond Hettinger | 6b27cda | 2005-09-24 21:23:05 +0000 | [diff] [blame] | 2670 | return NULL; |
| 2671 | } |
Jack Diederich | 6c433a9 | 2006-05-26 11:15:17 +0000 | [diff] [blame] | 2672 | return PyInt_FromSize_t(ro->cnt); |
Raymond Hettinger | 5cab2e3 | 2004-02-10 09:25:40 +0000 | [diff] [blame] | 2673 | } |
| 2674 | |
Armin Rigo | f5b3e36 | 2006-02-11 21:32:43 +0000 | [diff] [blame] | 2675 | PyDoc_STRVAR(length_hint_doc, "Private method returning an estimate of len(list(it))."); |
Raymond Hettinger | 6b27cda | 2005-09-24 21:23:05 +0000 | [diff] [blame] | 2676 | |
| 2677 | static PyMethodDef repeat_methods[] = { |
Armin Rigo | f5b3e36 | 2006-02-11 21:32:43 +0000 | [diff] [blame] | 2678 | {"__length_hint__", (PyCFunction)repeat_len, METH_NOARGS, length_hint_doc}, |
Raymond Hettinger | 6b27cda | 2005-09-24 21:23:05 +0000 | [diff] [blame] | 2679 | {NULL, NULL} /* sentinel */ |
Raymond Hettinger | 5cab2e3 | 2004-02-10 09:25:40 +0000 | [diff] [blame] | 2680 | }; |
| 2681 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2682 | PyDoc_STRVAR(repeat_doc, |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2683 | "repeat(element [,times]) -> create an iterator which returns the element\n\ |
| 2684 | for the specified number of times. If not specified, returns the element\n\ |
| 2685 | endlessly."); |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2686 | |
Raymond Hettinger | 1d7a348 | 2003-07-14 07:07:12 +0000 | [diff] [blame] | 2687 | static PyTypeObject repeat_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 2688 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2689 | "itertools.repeat", /* tp_name */ |
| 2690 | sizeof(repeatobject), /* tp_basicsize */ |
| 2691 | 0, /* tp_itemsize */ |
| 2692 | /* methods */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2693 | (destructor)repeat_dealloc, /* tp_dealloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2694 | 0, /* tp_print */ |
| 2695 | 0, /* tp_getattr */ |
| 2696 | 0, /* tp_setattr */ |
| 2697 | 0, /* tp_compare */ |
Raymond Hettinger | 7dacda2 | 2004-04-08 21:54:00 +0000 | [diff] [blame] | 2698 | (reprfunc)repeat_repr, /* tp_repr */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2699 | 0, /* tp_as_number */ |
Raymond Hettinger | 6b27cda | 2005-09-24 21:23:05 +0000 | [diff] [blame] | 2700 | 0, /* tp_as_sequence */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2701 | 0, /* tp_as_mapping */ |
| 2702 | 0, /* tp_hash */ |
| 2703 | 0, /* tp_call */ |
| 2704 | 0, /* tp_str */ |
| 2705 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 2706 | 0, /* tp_setattro */ |
| 2707 | 0, /* tp_as_buffer */ |
| 2708 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 2709 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2710 | repeat_doc, /* tp_doc */ |
| 2711 | (traverseproc)repeat_traverse, /* tp_traverse */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2712 | 0, /* tp_clear */ |
| 2713 | 0, /* tp_richcompare */ |
| 2714 | 0, /* tp_weaklistoffset */ |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 2715 | PyObject_SelfIter, /* tp_iter */ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2716 | (iternextfunc)repeat_next, /* tp_iternext */ |
Raymond Hettinger | 6b27cda | 2005-09-24 21:23:05 +0000 | [diff] [blame] | 2717 | repeat_methods, /* tp_methods */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2718 | 0, /* tp_members */ |
| 2719 | 0, /* tp_getset */ |
| 2720 | 0, /* tp_base */ |
| 2721 | 0, /* tp_dict */ |
| 2722 | 0, /* tp_descr_get */ |
| 2723 | 0, /* tp_descr_set */ |
| 2724 | 0, /* tp_dictoffset */ |
| 2725 | 0, /* tp_init */ |
Raymond Hettinger | bfef18c | 2003-05-23 03:55:42 +0000 | [diff] [blame] | 2726 | 0, /* tp_alloc */ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2727 | repeat_new, /* tp_new */ |
| 2728 | PyObject_GC_Del, /* tp_free */ |
| 2729 | }; |
| 2730 | |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2731 | /* iziplongest object ************************************************************/ |
| 2732 | |
| 2733 | #include "Python.h" |
| 2734 | |
| 2735 | typedef struct { |
| 2736 | PyObject_HEAD |
| 2737 | Py_ssize_t tuplesize; |
| 2738 | Py_ssize_t numactive; |
| 2739 | PyObject *ittuple; /* tuple of iterators */ |
| 2740 | PyObject *result; |
| 2741 | PyObject *fillvalue; |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2742 | } iziplongestobject; |
| 2743 | |
| 2744 | static PyTypeObject iziplongest_type; |
| 2745 | |
| 2746 | static PyObject * |
| 2747 | izip_longest_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 2748 | { |
| 2749 | iziplongestobject *lz; |
| 2750 | Py_ssize_t i; |
| 2751 | PyObject *ittuple; /* tuple of iterators */ |
| 2752 | PyObject *result; |
| 2753 | PyObject *fillvalue = Py_None; |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2754 | Py_ssize_t tuplesize = PySequence_Length(args); |
| 2755 | |
| 2756 | if (kwds != NULL && PyDict_CheckExact(kwds) && PyDict_Size(kwds) > 0) { |
| 2757 | fillvalue = PyDict_GetItemString(kwds, "fillvalue"); |
| 2758 | if (fillvalue == NULL || PyDict_Size(kwds) > 1) { |
| 2759 | PyErr_SetString(PyExc_TypeError, |
| 2760 | "izip_longest() got an unexpected keyword argument"); |
| 2761 | return NULL; |
| 2762 | } |
| 2763 | } |
| 2764 | |
| 2765 | /* args must be a tuple */ |
| 2766 | assert(PyTuple_Check(args)); |
| 2767 | |
| 2768 | /* obtain iterators */ |
| 2769 | ittuple = PyTuple_New(tuplesize); |
| 2770 | if (ittuple == NULL) |
| 2771 | return NULL; |
| 2772 | for (i=0; i < tuplesize; ++i) { |
| 2773 | PyObject *item = PyTuple_GET_ITEM(args, i); |
| 2774 | PyObject *it = PyObject_GetIter(item); |
| 2775 | if (it == NULL) { |
| 2776 | if (PyErr_ExceptionMatches(PyExc_TypeError)) |
| 2777 | PyErr_Format(PyExc_TypeError, |
| 2778 | "izip_longest argument #%zd must support iteration", |
| 2779 | i+1); |
| 2780 | Py_DECREF(ittuple); |
| 2781 | return NULL; |
| 2782 | } |
| 2783 | PyTuple_SET_ITEM(ittuple, i, it); |
| 2784 | } |
| 2785 | |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2786 | /* create a result holder */ |
| 2787 | result = PyTuple_New(tuplesize); |
| 2788 | if (result == NULL) { |
| 2789 | Py_DECREF(ittuple); |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2790 | return NULL; |
| 2791 | } |
| 2792 | for (i=0 ; i < tuplesize ; i++) { |
| 2793 | Py_INCREF(Py_None); |
| 2794 | PyTuple_SET_ITEM(result, i, Py_None); |
| 2795 | } |
| 2796 | |
| 2797 | /* create iziplongestobject structure */ |
| 2798 | lz = (iziplongestobject *)type->tp_alloc(type, 0); |
| 2799 | if (lz == NULL) { |
| 2800 | Py_DECREF(ittuple); |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2801 | Py_DECREF(result); |
| 2802 | return NULL; |
| 2803 | } |
| 2804 | lz->ittuple = ittuple; |
| 2805 | lz->tuplesize = tuplesize; |
| 2806 | lz->numactive = tuplesize; |
| 2807 | lz->result = result; |
| 2808 | Py_INCREF(fillvalue); |
| 2809 | lz->fillvalue = fillvalue; |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2810 | return (PyObject *)lz; |
| 2811 | } |
| 2812 | |
| 2813 | static void |
| 2814 | izip_longest_dealloc(iziplongestobject *lz) |
| 2815 | { |
| 2816 | PyObject_GC_UnTrack(lz); |
| 2817 | Py_XDECREF(lz->ittuple); |
| 2818 | Py_XDECREF(lz->result); |
| 2819 | Py_XDECREF(lz->fillvalue); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2820 | Py_TYPE(lz)->tp_free(lz); |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2821 | } |
| 2822 | |
| 2823 | static int |
| 2824 | izip_longest_traverse(iziplongestobject *lz, visitproc visit, void *arg) |
| 2825 | { |
| 2826 | Py_VISIT(lz->ittuple); |
| 2827 | Py_VISIT(lz->result); |
| 2828 | Py_VISIT(lz->fillvalue); |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2829 | return 0; |
| 2830 | } |
| 2831 | |
| 2832 | static PyObject * |
| 2833 | izip_longest_next(iziplongestobject *lz) |
| 2834 | { |
| 2835 | Py_ssize_t i; |
| 2836 | Py_ssize_t tuplesize = lz->tuplesize; |
| 2837 | PyObject *result = lz->result; |
| 2838 | PyObject *it; |
| 2839 | PyObject *item; |
| 2840 | PyObject *olditem; |
| 2841 | |
| 2842 | if (tuplesize == 0) |
| 2843 | return NULL; |
Raymond Hettinger | 1b6ca54 | 2007-02-21 17:22:05 +0000 | [diff] [blame] | 2844 | if (lz->numactive == 0) |
| 2845 | return NULL; |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2846 | if (Py_REFCNT(result) == 1) { |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2847 | Py_INCREF(result); |
| 2848 | for (i=0 ; i < tuplesize ; i++) { |
| 2849 | it = PyTuple_GET_ITEM(lz->ittuple, i); |
Raymond Hettinger | 1b6ca54 | 2007-02-21 17:22:05 +0000 | [diff] [blame] | 2850 | if (it == NULL) { |
| 2851 | Py_INCREF(lz->fillvalue); |
| 2852 | item = lz->fillvalue; |
| 2853 | } else { |
| 2854 | assert(PyIter_Check(it)); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2855 | item = (*Py_TYPE(it)->tp_iternext)(it); |
Raymond Hettinger | 1b6ca54 | 2007-02-21 17:22:05 +0000 | [diff] [blame] | 2856 | if (item == NULL) { |
| 2857 | lz->numactive -= 1; |
| 2858 | if (lz->numactive == 0) { |
| 2859 | Py_DECREF(result); |
| 2860 | return NULL; |
| 2861 | } else { |
| 2862 | Py_INCREF(lz->fillvalue); |
| 2863 | item = lz->fillvalue; |
| 2864 | PyTuple_SET_ITEM(lz->ittuple, i, NULL); |
| 2865 | Py_DECREF(it); |
| 2866 | } |
| 2867 | } |
| 2868 | } |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2869 | olditem = PyTuple_GET_ITEM(result, i); |
| 2870 | PyTuple_SET_ITEM(result, i, item); |
| 2871 | Py_DECREF(olditem); |
| 2872 | } |
| 2873 | } else { |
| 2874 | result = PyTuple_New(tuplesize); |
| 2875 | if (result == NULL) |
| 2876 | return NULL; |
| 2877 | for (i=0 ; i < tuplesize ; i++) { |
| 2878 | it = PyTuple_GET_ITEM(lz->ittuple, i); |
Raymond Hettinger | 1b6ca54 | 2007-02-21 17:22:05 +0000 | [diff] [blame] | 2879 | if (it == NULL) { |
| 2880 | Py_INCREF(lz->fillvalue); |
| 2881 | item = lz->fillvalue; |
| 2882 | } else { |
| 2883 | assert(PyIter_Check(it)); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2884 | item = (*Py_TYPE(it)->tp_iternext)(it); |
Raymond Hettinger | 1b6ca54 | 2007-02-21 17:22:05 +0000 | [diff] [blame] | 2885 | if (item == NULL) { |
| 2886 | lz->numactive -= 1; |
| 2887 | if (lz->numactive == 0) { |
| 2888 | Py_DECREF(result); |
| 2889 | return NULL; |
| 2890 | } else { |
| 2891 | Py_INCREF(lz->fillvalue); |
| 2892 | item = lz->fillvalue; |
| 2893 | PyTuple_SET_ITEM(lz->ittuple, i, NULL); |
| 2894 | Py_DECREF(it); |
| 2895 | } |
| 2896 | } |
| 2897 | } |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2898 | PyTuple_SET_ITEM(result, i, item); |
| 2899 | } |
| 2900 | } |
| 2901 | return result; |
| 2902 | } |
| 2903 | |
| 2904 | PyDoc_STRVAR(izip_longest_doc, |
| 2905 | "izip_longest(iter1 [,iter2 [...]], [fillvalue=None]) --> izip_longest object\n\ |
| 2906 | \n\ |
| 2907 | Return an izip_longest object whose .next() method returns a tuple where\n\ |
| 2908 | the i-th element comes from the i-th iterable argument. The .next()\n\ |
| 2909 | method continues until the longest iterable in the argument sequence\n\ |
| 2910 | is exhausted and then it raises StopIteration. When the shorter iterables\n\ |
| 2911 | are exhausted, the fillvalue is substituted in their place. The fillvalue\n\ |
| 2912 | defaults to None or can be specified by a keyword argument.\n\ |
| 2913 | "); |
| 2914 | |
| 2915 | static PyTypeObject iziplongest_type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 2916 | PyVarObject_HEAD_INIT(NULL, 0) |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2917 | "itertools.izip_longest", /* tp_name */ |
| 2918 | sizeof(iziplongestobject), /* tp_basicsize */ |
| 2919 | 0, /* tp_itemsize */ |
| 2920 | /* methods */ |
| 2921 | (destructor)izip_longest_dealloc, /* tp_dealloc */ |
| 2922 | 0, /* tp_print */ |
| 2923 | 0, /* tp_getattr */ |
| 2924 | 0, /* tp_setattr */ |
| 2925 | 0, /* tp_compare */ |
| 2926 | 0, /* tp_repr */ |
| 2927 | 0, /* tp_as_number */ |
| 2928 | 0, /* tp_as_sequence */ |
| 2929 | 0, /* tp_as_mapping */ |
| 2930 | 0, /* tp_hash */ |
| 2931 | 0, /* tp_call */ |
| 2932 | 0, /* tp_str */ |
| 2933 | PyObject_GenericGetAttr, /* tp_getattro */ |
| 2934 | 0, /* tp_setattro */ |
| 2935 | 0, /* tp_as_buffer */ |
| 2936 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 2937 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| 2938 | izip_longest_doc, /* tp_doc */ |
| 2939 | (traverseproc)izip_longest_traverse, /* tp_traverse */ |
| 2940 | 0, /* tp_clear */ |
| 2941 | 0, /* tp_richcompare */ |
| 2942 | 0, /* tp_weaklistoffset */ |
| 2943 | PyObject_SelfIter, /* tp_iter */ |
| 2944 | (iternextfunc)izip_longest_next, /* tp_iternext */ |
| 2945 | 0, /* tp_methods */ |
| 2946 | 0, /* tp_members */ |
| 2947 | 0, /* tp_getset */ |
| 2948 | 0, /* tp_base */ |
| 2949 | 0, /* tp_dict */ |
| 2950 | 0, /* tp_descr_get */ |
| 2951 | 0, /* tp_descr_set */ |
| 2952 | 0, /* tp_dictoffset */ |
| 2953 | 0, /* tp_init */ |
| 2954 | 0, /* tp_alloc */ |
| 2955 | izip_longest_new, /* tp_new */ |
| 2956 | PyObject_GC_Del, /* tp_free */ |
| 2957 | }; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2958 | |
| 2959 | /* module level code ********************************************************/ |
| 2960 | |
| 2961 | PyDoc_STRVAR(module_doc, |
| 2962 | "Functional tools for creating and using iterators.\n\ |
| 2963 | \n\ |
| 2964 | Infinite iterators:\n\ |
| 2965 | count([n]) --> n, n+1, n+2, ...\n\ |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2966 | cycle(p) --> p0, p1, ... plast, p0, p1, ...\n\ |
Andrew M. Kuchling | dff694b | 2003-04-14 15:31:27 +0000 | [diff] [blame] | 2967 | 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] | 2968 | \n\ |
| 2969 | Iterators terminating on the shortest input sequence:\n\ |
| 2970 | izip(p, q, ...) --> (p[0], q[0]), (p[1], q[1]), ... \n\ |
Raymond Hettinger | d36862c | 2007-02-21 05:20:38 +0000 | [diff] [blame] | 2971 | izip_longest(p, q, ...) --> (p[0], q[0]), (p[1], q[1]), ... \n\ |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2972 | ifilter(pred, seq) --> elements of seq where pred(elem) is True\n\ |
| 2973 | ifilterfalse(pred, seq) --> elements of seq where pred(elem) is False\n\ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2974 | islice(seq, [start,] stop [, step]) --> elements from\n\ |
| 2975 | seq[start:stop:step]\n\ |
| 2976 | imap(fun, p, q, ...) --> fun(p0, q0), fun(p1, q1), ...\n\ |
| 2977 | starmap(fun, seq) --> fun(*seq[0]), fun(*seq[1]), ...\n\ |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 2978 | 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] | 2979 | chain(p, q, ...) --> p0, p1, ... plast, q0, q1, ... \n\ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2980 | takewhile(pred, seq) --> seq[0], seq[1], until pred fails\n\ |
| 2981 | 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] | 2982 | groupby(iterable[, keyfunc]) --> sub-iterators grouped by value of keyfunc(v)\n\ |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2983 | "); |
| 2984 | |
| 2985 | |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 2986 | static PyMethodDef module_methods[] = { |
| 2987 | {"tee", (PyCFunction)tee, METH_VARARGS, tee_doc}, |
| 2988 | {NULL, NULL} /* sentinel */ |
| 2989 | }; |
| 2990 | |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2991 | PyMODINIT_FUNC |
| 2992 | inititertools(void) |
| 2993 | { |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2994 | int i; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 2995 | PyObject *m; |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2996 | char *name; |
| 2997 | PyTypeObject *typelist[] = { |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 2998 | &cycle_type, |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 2999 | &dropwhile_type, |
| 3000 | &takewhile_type, |
| 3001 | &islice_type, |
| 3002 | &starmap_type, |
| 3003 | &imap_type, |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 3004 | &chain_type, |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 3005 | &ifilter_type, |
| 3006 | &ifilterfalse_type, |
| 3007 | &count_type, |
| 3008 | &izip_type, |
Raymond Hettinger | 50986cc | 2008-02-22 03:16:42 +0000 | [diff] [blame] | 3009 | &iziplongest_type, |
| 3010 | &product_type, |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 3011 | &repeat_type, |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 3012 | &groupby_type, |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 3013 | NULL |
| 3014 | }; |
| 3015 | |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 3016 | Py_TYPE(&teedataobject_type) = &PyType_Type; |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 3017 | m = Py_InitModule3("itertools", module_methods, module_doc); |
Neal Norwitz | 1ac754f | 2006-01-19 06:09:39 +0000 | [diff] [blame] | 3018 | if (m == NULL) |
| 3019 | return; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 3020 | |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 3021 | for (i=0 ; typelist[i] != NULL ; i++) { |
| 3022 | if (PyType_Ready(typelist[i]) < 0) |
| 3023 | return; |
Raymond Hettinger | d449eab | 2003-05-22 16:32:58 +0000 | [diff] [blame] | 3024 | name = strchr(typelist[i]->tp_name, '.'); |
Raymond Hettinger | 61fe64d | 2003-02-23 04:40:07 +0000 | [diff] [blame] | 3025 | assert (name != NULL); |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 3026 | Py_INCREF(typelist[i]); |
Raymond Hettinger | d449eab | 2003-05-22 16:32:58 +0000 | [diff] [blame] | 3027 | PyModule_AddObject(m, name+1, (PyObject *)typelist[i]); |
Raymond Hettinger | 60eca93 | 2003-02-09 06:40:58 +0000 | [diff] [blame] | 3028 | } |
Raymond Hettinger | ad983e7 | 2003-11-12 14:32:26 +0000 | [diff] [blame] | 3029 | |
| 3030 | if (PyType_Ready(&teedataobject_type) < 0) |
| 3031 | return; |
| 3032 | if (PyType_Ready(&tee_type) < 0) |
| 3033 | return; |
Raymond Hettinger | d25c1c6 | 2003-12-06 16:23:06 +0000 | [diff] [blame] | 3034 | if (PyType_Ready(&_grouper_type) < 0) |
| 3035 | return; |
Raymond Hettinger | 96ef811 | 2003-02-01 00:10:11 +0000 | [diff] [blame] | 3036 | } |