| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id$ |
| 4 | * |
| 5 | * Double-ended arrays |
| 6 | * |
| 7 | * (c) 2005 Straylight/Edgeware |
| 8 | */ |
| 9 | |
| 10 | /*----- Licensing notice --------------------------------------------------* |
| 11 | * |
| 12 | * This file is part of the Python interface to mLib. |
| 13 | * |
| 14 | * mLib/Python is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License as published by |
| 16 | * the Free Software Foundation; either version 2 of the License, or |
| 17 | * (at your option) any later version. |
| 18 | * |
| 19 | * mLib/Python is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License |
| 25 | * along with mLib/Python; if not, write to the Free Software Foundation, |
| 26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 27 | */ |
| 28 | |
| 29 | /*----- Header files ------------------------------------------------------*/ |
| 30 | |
| 31 | #include <Python.h> |
| 32 | |
| 33 | #include <string.h> |
| 34 | |
| 35 | #include <mLib/darray.h> |
| 36 | #include <mLib/dstr.h> |
| 37 | #include <mLib/exc.h> |
| 38 | |
| 39 | #include "array.h" |
| 40 | #include "grim.h" |
| 41 | |
| 42 | /*----- Data structures ---------------------------------------------------*/ |
| 43 | |
| 44 | DA_DECL(obj_v, PyObject *); |
| 45 | |
| 46 | typedef struct da_pyobj { |
| 47 | PyObject_HEAD |
| 48 | obj_v v; |
| 49 | } da_pyobj; |
| 50 | #define DA_PYCHECK(o) PyObject_TypeCheck((o), &da_pytype) |
| 51 | #define DA_V(o) (&((da_pyobj *)(o))->v) |
| 52 | |
| 53 | typedef struct daiter_pyobj { |
| 54 | PyObject_HEAD |
| 55 | PyObject *da; |
| 56 | size_t i; |
| 57 | } daiter_pyobj; |
| 58 | #define DAITER_DA(obj) (((daiter_pyobj *)(obj))->da) |
| 59 | #define DAITER_V(obj) DA_V(DAITER_DA(obj)) |
| 60 | #define DAITER_I(obj) (((daiter_pyobj *)(obj))->i) |
| 61 | |
| 62 | static int getseq(PyObject **pseq, PyObject ***v, size_t *n) |
| 63 | { |
| 64 | PyObject *seq = *pseq; |
| 65 | |
| 66 | if (!seq || seq == Py_None) { |
| 67 | *v = 0; |
| 68 | *n = 0; |
| 69 | *pseq = 0; |
| 70 | } else if (DA_PYCHECK(seq)) { |
| 71 | *v = DA(DA_V(seq)); |
| 72 | *n = DA_LEN(DA_V(seq)); |
| 73 | Py_INCREF(seq); |
| 74 | } else if ((seq = PySequence_Fast(seq, "expected iterable")) == 0) |
| 75 | return (-1); |
| 76 | else { |
| 77 | *pseq = seq; |
| 78 | *v = PySequence_Fast_ITEMS(seq); |
| 79 | *n = PySequence_Fast_GET_SIZE(seq); |
| 80 | } |
| 81 | return (0); |
| 82 | } |
| 83 | |
| 84 | static void range_inc(PyObject **v, PyObject **vl) |
| 85 | { while (v < vl) { Py_INCREF(*v); v++; } } |
| 86 | static void range_dec(PyObject **v, PyObject **vl) |
| 87 | { if (v) { while (v < vl) { Py_DECREF(*v); v++; } } } |
| 88 | static void range_copy(PyObject ***gv, PyObject ***gvl) |
| 89 | { |
| 90 | size_t n = *gvl - *gv; |
| 91 | size_t sz = sizeof(PyObject *) * n; |
| 92 | PyObject **v; |
| 93 | if (!n) { *gv = *gvl = 0; return; } |
| 94 | v = xmalloc(sz); |
| 95 | memcpy(v, *gv, sz); |
| 96 | *gv = v; |
| 97 | *gvl = v + n; |
| 98 | } |
| 99 | |
| 100 | static PyObject *abstract_pynew(PyTypeObject *ty, |
| 101 | PyObject *hunoz, PyObject *hukairz) |
| 102 | { |
| 103 | PyErr_SetString(PyExc_TypeError, "can't instantiate this type"); |
| 104 | return (0); |
| 105 | } |
| 106 | |
| 107 | /*----- Iterator ----------------------------------------------------------*/ |
| 108 | |
| 109 | static PyObject *daiter_pynext(PyObject *me) |
| 110 | { |
| 111 | PyObject *x; |
| 112 | |
| 113 | if (DAITER_I(me) >= DA_LEN(DAITER_V(me))) return (0); |
| 114 | x = DA(DAITER_V(me))[DAITER_I(me)]; DAITER_I(me)++; RETURN_OBJ(x); |
| 115 | } |
| 116 | |
| 117 | static void daiter_pydealloc(PyObject *me) |
| 118 | { Py_DECREF(DAITER_DA(me)); PyObject_DEL(me); } |
| 119 | |
| 120 | PyTypeObject daiter_pytype = { |
| 121 | PyObject_HEAD_INIT(0) 0, /* Header */ |
| 122 | "array.ArrayIter", /* @tp_name@ */ |
| 123 | sizeof(daiter_pyobj), /* @tp_basicsize@ */ |
| 124 | 0, /* @tp_itemsize@ */ |
| 125 | |
| 126 | daiter_pydealloc, /* @tp_dealloc@ */ |
| 127 | 0, /* @tp_print@ */ |
| 128 | 0, /* @tp_getattr@ */ |
| 129 | 0, /* @tp_setattr@ */ |
| 130 | 0, /* @tp_compare@ */ |
| 131 | 0, /* @tp_repr@ */ |
| 132 | 0, /* @tp_as_number@ */ |
| 133 | 0, /* @tp_as_sequence@ */ |
| 134 | 0, /* @tp_as_mapping@ */ |
| 135 | 0, /* @tp_hash@ */ |
| 136 | 0, /* @tp_call@ */ |
| 137 | 0, /* @tp_str@ */ |
| 138 | 0, /* @tp_getattro@ */ |
| 139 | 0, /* @tp_setattro@ */ |
| 140 | 0, /* @tp_as_buffer@ */ |
| 141 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ |
| 142 | Py_TPFLAGS_BASETYPE, |
| 143 | |
| 144 | /* @tp_doc@ */ |
| 145 | "Array iterator.", |
| 146 | |
| 147 | 0, /* @tp_traverse@ */ |
| 148 | 0, /* @tp_clear@ */ |
| 149 | 0, /* @tp_richcompare@ */ |
| 150 | 0, /* @tp_weaklistoffset@ */ |
| 151 | PyObject_SelfIter, /* @tp_iter@ */ |
| 152 | daiter_pynext, /* @tp_iternexr@ */ |
| 153 | 0, /* @tp_methods@ */ |
| 154 | 0, /* @tp_members@ */ |
| 155 | 0, /* @tp_getset@ */ |
| 156 | 0, /* @tp_base@ */ |
| 157 | 0, /* @tp_dict@ */ |
| 158 | 0, /* @tp_descr_get@ */ |
| 159 | 0, /* @tp_descr_set@ */ |
| 160 | 0, /* @tp_dictoffset@ */ |
| 161 | 0, /* @tp_init@ */ |
| 162 | PyType_GenericAlloc, /* @tp_alloc@ */ |
| 163 | abstract_pynew, /* @tp_new@ */ |
| 164 | 0, /* @tp_free@ */ |
| 165 | 0 /* @tp_is_gc@ */ |
| 166 | }; |
| 167 | |
| 168 | /*----- Main array code ---------------------------------------------------*/ |
| 169 | |
| 170 | static void da_doinsert(PyObject *me, PyObject **items, size_t n, |
| 171 | size_t start, size_t end) |
| 172 | { |
| 173 | PyObject **v, **gv, **gvl; |
| 174 | obj_v *da = DA_V(me); |
| 175 | size_t off, ne; |
| 176 | |
| 177 | ne = end - start; |
| 178 | v = DA(da); |
| 179 | gv = v + start; gvl = v + end; range_copy(&gv, &gvl); |
| 180 | if (start < DA_LEN(da) - end) { |
| 181 | if (n > ne) { |
| 182 | off = n - ne; |
| 183 | DA_SHUNT(da, off); |
| 184 | DA_UNSAFE_SLIDE(da, off); |
| 185 | memmove(v, v + off, sizeof(PyObject *) * start); |
| 186 | } else { |
| 187 | off = ne - n; |
| 188 | memmove(v + off, v, sizeof(PyObject *) * start); |
| 189 | DA_UNSAFE_UNSLIDE(da, off); |
| 190 | } |
| 191 | } else { |
| 192 | if (n > ne) { |
| 193 | off = n - ne; |
| 194 | DA_ENSURE(da, off); |
| 195 | memmove(v + end + off, v + end, |
| 196 | sizeof(PyObject *) * (DA_LEN(da) - end)); |
| 197 | } else { |
| 198 | off = ne - n; |
| 199 | memmove(v + end - off, v + end, |
| 200 | sizeof(PyObject *) * (DA_LEN(da) - end)); |
| 201 | DA_UNSAFE_SHRINK(da, off); |
| 202 | } |
| 203 | DA_UNSAFE_EXTEND(da, off); |
| 204 | } |
| 205 | |
| 206 | if (n) { |
| 207 | v = DA(da) + start; |
| 208 | memcpy(v, items, sizeof(PyObject *) * n); |
| 209 | range_inc(v, v + n); |
| 210 | } |
| 211 | if (gv) { |
| 212 | range_dec(gv, gvl); |
| 213 | xfree(gv); |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | static int da_insert(PyObject *me, PyObject *seq, int start, int end) |
| 218 | { |
| 219 | PyObject **items; |
| 220 | size_t n; |
| 221 | |
| 222 | if (0 > start || start > end || end > DA_LEN(DA_V(me))) { |
| 223 | PyErr_SetString(PyExc_IndexError, "bad slice"); |
| 224 | return (-1); |
| 225 | } |
| 226 | if (getseq(&seq, &items, &n)) return (-1); |
| 227 | da_doinsert(me, items, n, start, end); |
| 228 | Py_XDECREF(seq); |
| 229 | return (0); |
| 230 | } |
| 231 | |
| 232 | static PyObject *da_new(PyTypeObject *ty) |
| 233 | { |
| 234 | da_pyobj *me = (da_pyobj *)ty->tp_alloc(ty, 0); |
| 235 | DA_CREATE(&me->v); |
| 236 | return ((PyObject *)me); |
| 237 | } |
| 238 | |
| 239 | static PyObject *da_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw) |
| 240 | { return (da_new(ty)); } |
| 241 | static int da_pyinit(PyObject *me, PyObject *arg, PyObject *kw) |
| 242 | { |
| 243 | PyObject *init = 0; |
| 244 | static char *kwlist[] = { "sequence", 0 }; |
| 245 | |
| 246 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O:new", kwlist, &init) || |
| 247 | (init && da_insert((PyObject *)me, init, 0, 0))) |
| 248 | return (-1); |
| 249 | return (0); |
| 250 | } |
| 251 | |
| 252 | static void da_pydealloc(PyObject *me) |
| 253 | { |
| 254 | size_t i; |
| 255 | PyObject **v = DA(DA_V(me)); |
| 256 | size_t n = DA_LEN(DA_V(me)); |
| 257 | |
| 258 | for (i = 0; i < n; i++) Py_DECREF(v[i]); |
| 259 | DA_DESTROY(DA_V(me)); |
| 260 | } |
| 261 | |
| 262 | static int da_pylength(PyObject *me) |
| 263 | { return (DA_LEN(DA_V(me))); } |
| 264 | |
| 265 | static int da_pytraverse(PyObject *me, visitproc proc, void *arg) |
| 266 | { |
| 267 | size_t i; |
| 268 | PyObject **v = DA(DA_V(me)); |
| 269 | size_t n = DA_LEN(DA_V(me)); |
| 270 | int err; |
| 271 | |
| 272 | for (i = 0; i < n; i++) { |
| 273 | if ((err = proc(v[i], arg)) != 0) |
| 274 | return (err); |
| 275 | } |
| 276 | return (0); |
| 277 | } |
| 278 | |
| 279 | static int da_pyclear(PyObject *me) |
| 280 | { |
| 281 | range_dec(DA(DA_V(me)), DA(DA_V(me)) + DA_LEN(DA_V(me))); |
| 282 | DA_RESET(DA_V(me)); |
| 283 | return (0); |
| 284 | } |
| 285 | |
| 286 | static PyObject *da_pyconcat(PyObject *me, PyObject *other) |
| 287 | { |
| 288 | PyObject *x = da_new(&da_pytype); |
| 289 | PyObject **items = DA(DA_V(me)); |
| 290 | size_t n = DA_LEN(DA_V(me)); |
| 291 | |
| 292 | da_doinsert(x, items, n, 0, 0); |
| 293 | if (da_insert(x, other, n, n)) { |
| 294 | Py_DECREF(x); |
| 295 | return (0); |
| 296 | } |
| 297 | return (x); |
| 298 | } |
| 299 | |
| 300 | static PyObject *da_pyrepeat(PyObject *me, int times) |
| 301 | { |
| 302 | PyObject *x = da_new(&da_pytype); |
| 303 | PyObject **items = DA(DA_V(me)), **dest; |
| 304 | size_t n = DA_LEN(DA_V(me)); |
| 305 | int i; |
| 306 | |
| 307 | DA_ENSURE(DA_V(x), n * times); |
| 308 | DA_UNSAFE_EXTEND(DA_V(x), n * times); |
| 309 | for (i = 0, dest = DA(DA_V(x)); i < times; i++, dest += n) |
| 310 | memcpy(dest, items, n * sizeof(PyObject *)); |
| 311 | range_inc(DA(DA_V(x)), DA(DA_V(x)) + n * times); |
| 312 | return (x); |
| 313 | } |
| 314 | |
| 315 | static PyObject *da_pygetitem(PyObject *me, int i) |
| 316 | { |
| 317 | PyObject *o; |
| 318 | |
| 319 | if (i < 0 || i >= DA_LEN(DA_V(me))) { |
| 320 | PyErr_SetString(PyExc_IndexError, "index out of range"); |
| 321 | return (0); |
| 322 | } |
| 323 | o = DA(DA_V(me))[i]; |
| 324 | Py_INCREF(o); |
| 325 | return (o); |
| 326 | } |
| 327 | |
| 328 | static PyObject *da_pygetslice(PyObject *me, int i, int j) |
| 329 | { |
| 330 | PyObject *x; |
| 331 | |
| 332 | if (i < 0 || j < i || DA_LEN(DA_V(me)) < j) { |
| 333 | PyErr_SetString(PyExc_IndexError, "bad slice"); |
| 334 | return (0); |
| 335 | } |
| 336 | x = da_new(&da_pytype); |
| 337 | da_doinsert(x, DA(DA_V(me)) + i, j - i, 0, 0); |
| 338 | return (x); |
| 339 | } |
| 340 | |
| 341 | static int da_pyputitem(PyObject *me, int i, PyObject *x) |
| 342 | { |
| 343 | PyObject **p; |
| 344 | |
| 345 | if (i < 0 || i >= DA_LEN(DA_V(me))) { |
| 346 | PyErr_SetString(PyExc_IndexError, "index out of range"); |
| 347 | return (-1); |
| 348 | } |
| 349 | p = DA(DA_V(me)) + i; |
| 350 | Py_DECREF(*p); |
| 351 | *p = x; |
| 352 | Py_INCREF(*p); |
| 353 | return (0); |
| 354 | } |
| 355 | |
| 356 | static int da_pyputslice(PyObject *me, int i, int j, PyObject *x) |
| 357 | { return (da_insert(me, x, i, j)); } |
| 358 | |
| 359 | static int da_pycontainsp(PyObject *me, PyObject *x) |
| 360 | { |
| 361 | PyObject **items = DA(DA_V(me)); |
| 362 | size_t n = DA_LEN(DA_V(me)); |
| 363 | size_t i; |
| 364 | int rc; |
| 365 | |
| 366 | for (i = 0; i < n; i++) { |
| 367 | if (PyObject_Cmp(items[i], x, &rc)) |
| 368 | return (-1); |
| 369 | if (rc) |
| 370 | return (1); |
| 371 | } |
| 372 | return (0); |
| 373 | } |
| 374 | |
| 375 | static PyObject *da_pyrepr(PyObject *me) |
| 376 | { |
| 377 | dstr d = DSTR_INIT; |
| 378 | PyObject *s, *rc = 0; |
| 379 | char *p; |
| 380 | int n; |
| 381 | size_t i; |
| 382 | |
| 383 | dstr_puts(&d, "Array(["); |
| 384 | for (i = 0; i < DA_LEN(DA_V(me)); i++) { |
| 385 | if ((s = PyObject_Repr(DA(DA_V(me))[i])) == 0 || |
| 386 | PyString_AsStringAndSize(s, &p, &n)) { |
| 387 | Py_XDECREF(s); |
| 388 | goto done; |
| 389 | } |
| 390 | if (i) dstr_puts(&d, ", "); |
| 391 | dstr_putm(&d, p, n); |
| 392 | Py_DECREF(s); |
| 393 | } |
| 394 | dstr_puts(&d, "])"); |
| 395 | rc = PyString_FromStringAndSize(d.buf, d.len); |
| 396 | done: |
| 397 | dstr_destroy(&d); |
| 398 | return (rc); |
| 399 | } |
| 400 | |
| 401 | static PyObject *da_pyappend(PyObject *me, PyObject *seq) |
| 402 | { |
| 403 | size_t n = DA_LEN(DA_V(me)); |
| 404 | if (da_insert(me, seq, n, n)) return (0); |
| 405 | RETURN_ME; |
| 406 | } |
| 407 | |
| 408 | static PyObject *da_pyiprepeat(PyObject *me, int times) |
| 409 | { |
| 410 | PyObject **items, **dest; |
| 411 | size_t n = DA_LEN(DA_V(me)); |
| 412 | int i; |
| 413 | |
| 414 | if (times < 0) { |
| 415 | PyErr_SetString(PyExc_ValueError, "multiplier must be nonnegative"); |
| 416 | return (0); |
| 417 | } |
| 418 | if (!times) { |
| 419 | items = DA(DA_V(me)); |
| 420 | range_dec(items, items + n); |
| 421 | DA_RESET(DA_V(me)); |
| 422 | RETURN_ME; |
| 423 | } |
| 424 | times--; |
| 425 | DA_ENSURE(DA_V(me), n * times); |
| 426 | items = DA(DA_V(me)); |
| 427 | for (i = 0, dest = items + n; i < times; i++, dest += n) |
| 428 | memcpy(dest, items, n * sizeof(PyObject *)); |
| 429 | range_inc(items + n, dest); |
| 430 | DA_UNSAFE_EXTEND(DA_V(me), n * times); |
| 431 | RETURN_ME; |
| 432 | } |
| 433 | |
| 434 | static PyObject *da_pyget(PyObject *me, PyObject *index) |
| 435 | { |
| 436 | if (PySlice_Check(index)) { |
| 437 | int start, stop, step, len; |
| 438 | PyObject *v; |
| 439 | PyObject **ww; |
| 440 | PyObject **vv; |
| 441 | |
| 442 | if (PySlice_GetIndicesEx((PySliceObject *)index, DA_LEN(DA_V(me)), |
| 443 | &start, &stop, &step, &len)) |
| 444 | return (0); |
| 445 | if (step == 1) return (da_pygetslice(me, start, stop)); |
| 446 | v = da_new(&da_pytype); |
| 447 | DA_ENSURE(DA_V(v), len); |
| 448 | vv = DA(DA_V(v)); |
| 449 | ww = DA(DA_V(me)) + start; |
| 450 | DA_UNSAFE_EXTEND(DA_V(v), len); |
| 451 | while (len) { |
| 452 | *vv = *ww; |
| 453 | Py_INCREF(*vv); |
| 454 | vv++; ww += step; len--; |
| 455 | } |
| 456 | return ((PyObject *)v); |
| 457 | } else { |
| 458 | int i; |
| 459 | |
| 460 | if ((i = PyInt_AsLong(index)) == -1 && PyErr_Occurred()) return (0); |
| 461 | return (da_pygetitem(me, i)); |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | static int da_pyput(PyObject *me, PyObject *index, PyObject *x) |
| 466 | { |
| 467 | if (PySlice_Check(index)) { |
| 468 | int start, stop, step, len; |
| 469 | size_t n; |
| 470 | PyObject **ww; |
| 471 | PyObject **vv; |
| 472 | PyObject **g, **gg; |
| 473 | |
| 474 | if (PySlice_GetIndicesEx((PySliceObject *)index, DA_LEN(DA_V(me)), |
| 475 | &start, &stop, &step, &len)) |
| 476 | return (-1); |
| 477 | if (step == 1) return (da_insert(me, x, start, stop)); |
| 478 | if (getseq(&x, &vv, &n)) return (-1); |
| 479 | if (n != len) { |
| 480 | PyErr_SetString(PyExc_ValueError, "wrong number of items"); |
| 481 | Py_XDECREF(x); |
| 482 | return (-1); |
| 483 | } |
| 484 | g = gg = xmalloc(len * sizeof(PyObject *)); |
| 485 | ww = DA(DA_V(me)) + start; |
| 486 | while (len) { |
| 487 | *gg++ = *ww; *ww = *vv++; |
| 488 | Py_INCREF(*ww); |
| 489 | ww += step; len--; |
| 490 | } |
| 491 | range_dec(g, gg); |
| 492 | xfree(g); |
| 493 | Py_XDECREF(x); |
| 494 | return (0); |
| 495 | } else { |
| 496 | int i; |
| 497 | |
| 498 | if ((i = PyInt_AsLong(index)) == -1 && PyErr_Occurred()) return (-1); |
| 499 | return (da_pyputitem(me, i, x)); |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | static PyObject *da_pyiter(PyObject *me) |
| 504 | { |
| 505 | daiter_pyobj *i = PyObject_NEW(daiter_pyobj, &daiter_pytype); |
| 506 | i->da = me; Py_INCREF(me); |
| 507 | i->i = 0; |
| 508 | return ((PyObject *)i); |
| 509 | } |
| 510 | |
| 511 | static PyObject *dameth_push(PyObject *me, PyObject *arg) |
| 512 | { |
| 513 | PyObject *x; |
| 514 | |
| 515 | if (!PyArg_ParseTuple(arg, "O:push", &x)) return (0); |
| 516 | Py_INCREF(x); |
| 517 | DA_PUSH(DA_V(me), x); |
| 518 | RETURN_ME; |
| 519 | } |
| 520 | |
| 521 | static PyObject *dameth_pop(PyObject *me, PyObject *arg) |
| 522 | { |
| 523 | PyObject *x; |
| 524 | |
| 525 | if (!PyArg_ParseTuple(arg, ":pop")) return (0); |
| 526 | TRY |
| 527 | x = DA_POP(DA_V(me)); |
| 528 | CATCH switch (exc_type) { |
| 529 | case DAEXC_UFLOW: |
| 530 | PyErr_SetString(PyExc_ValueError, "stack underflow"); |
| 531 | return (0); |
| 532 | default: |
| 533 | RETHROW; |
| 534 | } END_TRY; |
| 535 | RETURN_OBJ(x); |
| 536 | } |
| 537 | |
| 538 | static PyObject *dameth_unshift(PyObject *me, PyObject *arg) |
| 539 | { |
| 540 | PyObject *x; |
| 541 | |
| 542 | if (!PyArg_ParseTuple(arg, "O:unshift", &x)) return (0); |
| 543 | Py_INCREF(x); |
| 544 | DA_UNSHIFT(DA_V(me), x); |
| 545 | RETURN_ME; |
| 546 | } |
| 547 | |
| 548 | static PyObject *dameth_shift(PyObject *me, PyObject *arg) |
| 549 | { |
| 550 | PyObject *x; |
| 551 | |
| 552 | if (!PyArg_ParseTuple(arg, ":shift")) return (0); |
| 553 | TRY |
| 554 | x = DA_SHIFT(DA_V(me)); |
| 555 | CATCH switch (exc_type) { |
| 556 | case DAEXC_UFLOW: |
| 557 | PyErr_SetString(PyExc_ValueError, "stack underflow"); |
| 558 | return (0); |
| 559 | default: |
| 560 | RETHROW; |
| 561 | } END_TRY; |
| 562 | RETURN_OBJ(x); |
| 563 | } |
| 564 | |
| 565 | static PyObject *dameth_tidy(PyObject *me, PyObject *arg) |
| 566 | { |
| 567 | if (!PyArg_ParseTuple(arg, ":tidy")) return (0); |
| 568 | DA_TIDY(DA_V(me)); |
| 569 | RETURN_ME; |
| 570 | } |
| 571 | |
| 572 | static PyMethodDef da_pymethods[] = { |
| 573 | #define METHNAME(func) dameth_##func |
| 574 | METH (push, "A.push(X): [A, B, ..., W], X -> [A, B, ..., W, X]") |
| 575 | METH (pop, "A.pop() -> X: [A, B, ..., W, X] -> [A, B, ..., W]") |
| 576 | METH (unshift, "A.unshift(X): [A, B, ..., W], X -> [X, A, ..., W]") |
| 577 | METH (shift, "A.shift() -> X: [X, A, ..., W] -> [A, ..., W], X") |
| 578 | METH (tidy, "A.tidy()") |
| 579 | #undef METHNAME |
| 580 | { 0 } |
| 581 | }; |
| 582 | |
| 583 | static PySequenceMethods da_pysequence = { |
| 584 | da_pylength, /* @sq_length@ */ |
| 585 | da_pyconcat, /* @sq_concat@ */ |
| 586 | da_pyrepeat, /* @sq_repeat@ */ |
| 587 | da_pygetitem, /* @sq_item@ */ |
| 588 | da_pygetslice, /* @sq_slice@ */ |
| 589 | da_pyputitem, /* @sq_ass_item@ */ |
| 590 | da_pyputslice, /* @sq_ass_slice@ */ |
| 591 | da_pycontainsp, /* @sq_contains@ */ |
| 592 | da_pyappend, /* @sq_inplace_concat@ */ |
| 593 | da_pyiprepeat /* @sq_inplace_repeat@ */ |
| 594 | }; |
| 595 | |
| 596 | static PyMappingMethods da_pymapping = { |
| 597 | da_pylength, /* @mp_length@ */ |
| 598 | da_pyget, /* @mp_subscript@ */ |
| 599 | da_pyput /* @mp_ass_subscript@ */ |
| 600 | }; |
| 601 | |
| 602 | PyTypeObject da_pytype = { |
| 603 | PyObject_HEAD_INIT(0) 0, /* Header */ |
| 604 | "array.Array", /* @tp_name@ */ |
| 605 | sizeof(da_pyobj), /* @tp_basicsize@ */ |
| 606 | 0, /* @tp_itemsize@ */ |
| 607 | |
| 608 | da_pydealloc, /* @tp_dealloc@ */ |
| 609 | 0, /* @tp_print@ */ |
| 610 | 0, /* @tp_getattr@ */ |
| 611 | 0, /* @tp_setattr@ */ |
| 612 | 0, /* @tp_compare@ */ |
| 613 | da_pyrepr, /* @tp_repr@ */ |
| 614 | 0, /* @tp_as_number@ */ |
| 615 | &da_pysequence, /* @tp_as_sequence@ */ |
| 616 | &da_pymapping, /* @tp_as_mapping@ */ |
| 617 | 0, /* @tp_hash@ */ |
| 618 | 0, /* @tp_call@ */ |
| 619 | &da_pyrepr, /* @tp_str@ */ |
| 620 | 0, /* @tp_getattro@ */ |
| 621 | 0, /* @tp_setattro@ */ |
| 622 | 0, /* @tp_as_buffer@ */ |
| 623 | Py_TPFLAGS_DEFAULT | /* @tp_flags@ */ |
| 624 | Py_TPFLAGS_HAVE_GC, |
| 625 | |
| 626 | /* @tp_doc@ */ |
| 627 | "Double-ended array type.", |
| 628 | |
| 629 | da_pytraverse, /* @tp_traverse@ */ |
| 630 | da_pyclear, /* @tp_clear@ */ |
| 631 | 0, /* @tp_richcompare@ */ |
| 632 | 0, /* @tp_weaklistoffset@ */ |
| 633 | da_pyiter, /* @tp_iter@ */ |
| 634 | 0, /* @tp_iternext@ */ |
| 635 | da_pymethods, /* @tp_methods@ */ |
| 636 | 0, /* @tp_members@ */ |
| 637 | 0, /* @tp_getset@ */ |
| 638 | 0, /* @tp_base@ */ |
| 639 | 0, /* @tp_dict@ */ |
| 640 | 0, /* @tp_descr_get@ */ |
| 641 | 0, /* @tp_descr_set@ */ |
| 642 | 0, /* @tp_dictoffset@ */ |
| 643 | da_pyinit, /* @tp_init@ */ |
| 644 | PyType_GenericAlloc, /* @tp_alloc@ */ |
| 645 | da_pynew, /* @tp_new@ */ |
| 646 | 0, /* @tp_free@ */ |
| 647 | 0 /* @tp_is_gc@ */ |
| 648 | }; |
| 649 | |
| 650 | /*----- Initialization ----------------------------------------------------*/ |
| 651 | |
| 652 | void da_pysetup(void) |
| 653 | { PyType_Ready(&da_pytype); PyType_Ready(&daiter_pytype); } |
| 654 | |
| 655 | /*----- That's all, folks -------------------------------------------------*/ |