5 * (c) 2005 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of the Python interface to mLib.
12 * mLib/Python is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * mLib/Python is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with mLib/Python; if not, write to the Free Software Foundation,
24 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 /*----- Header files ------------------------------------------------------*/
29 #define PY_SSIZE_T_CLEAN
35 #include <mLib/darray.h>
36 #include <mLib/dstr.h>
42 /*----- Data structures ---------------------------------------------------*/
44 DA_DECL(obj_v, PyObject *);
46 typedef struct da_pyobj {
50 #define DA_PYCHECK(o) PyObject_TypeCheck((o), &da_pytype)
51 #define DA_V(o) (&((da_pyobj *)(o))->v)
53 typedef struct 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)
62 static int getseq(PyObject **pseq, PyObject ***v, size_t *n)
64 PyObject *seq = *pseq;
66 if (!seq || seq == Py_None) {
70 } else if (DA_PYCHECK(seq)) {
72 *n = DA_LEN(DA_V(seq));
74 } else if ((seq = PySequence_Fast(seq, "expected iterable")) == 0)
78 *v = PySequence_Fast_ITEMS(seq);
79 *n = PySequence_Fast_GET_SIZE(seq);
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)
90 size_t n = *gvl - *gv;
91 size_t sz = sizeof(PyObject *) * n;
93 if (!n) { *gv = *gvl = 0; return; }
100 static PyObject *abstract_pynew(PyTypeObject *ty,
101 PyObject *hunoz, PyObject *hukairz)
103 PyErr_SetString(PyExc_TypeError, "can't instantiate this type");
107 /*----- Iterator ----------------------------------------------------------*/
109 static PyObject *daiter_pynext(PyObject *me)
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);
117 static void daiter_pydealloc(PyObject *me)
118 { Py_DECREF(DAITER_DA(me)); PyObject_DEL(me); }
120 PyTypeObject daiter_pytype = {
121 PyObject_HEAD_INIT(0) 0, /* Header */
122 "mLib.ArrayIter", /* @tp_name@ */
123 sizeof(daiter_pyobj), /* @tp_basicsize@ */
124 0, /* @tp_itemsize@ */
126 daiter_pydealloc, /* @tp_dealloc@ */
128 0, /* @tp_getattr@ */
129 0, /* @tp_setattr@ */
130 0, /* @tp_compare@ */
132 0, /* @tp_as_number@ */
133 0, /* @tp_as_sequence@ */
134 0, /* @tp_as_mapping@ */
138 0, /* @tp_getattro@ */
139 0, /* @tp_setattro@ */
140 0, /* @tp_as_buffer@ */
141 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
147 0, /* @tp_traverse@ */
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@ */
158 0, /* @tp_descr_get@ */
159 0, /* @tp_descr_set@ */
160 0, /* @tp_dictoffset@ */
162 PyType_GenericAlloc, /* @tp_alloc@ */
163 abstract_pynew, /* @tp_new@ */
168 /*----- Main array code ---------------------------------------------------*/
170 static void da_doinsert(PyObject *me, PyObject **items, size_t n,
171 size_t start, size_t end)
173 PyObject **v, **gv, **gvl;
174 obj_v *da = DA_V(me);
179 gv = v + start; gvl = v + end; range_copy(&gv, &gvl);
180 if (start < DA_LEN(da) - end) {
184 DA_UNSAFE_SLIDE(da, off);
185 memmove(v, v + off, sizeof(PyObject *) * start);
188 memmove(v + off, v, sizeof(PyObject *) * start);
189 DA_UNSAFE_UNSLIDE(da, off);
195 memmove(v + end + off, v + end,
196 sizeof(PyObject *) * (DA_LEN(da) - end));
199 memmove(v + end - off, v + end,
200 sizeof(PyObject *) * (DA_LEN(da) - end));
201 DA_UNSAFE_SHRINK(da, off);
203 DA_UNSAFE_EXTEND(da, off);
208 memcpy(v, items, sizeof(PyObject *) * n);
217 static int da_insert(PyObject *me, PyObject *seq, int start, int end)
222 if (0 > start || start > end || end > DA_LEN(DA_V(me))) {
223 PyErr_SetString(PyExc_IndexError, "bad slice");
226 if (getseq(&seq, &items, &n)) return (-1);
227 da_doinsert(me, items, n, start, end);
232 static PyObject *da_new(PyTypeObject *ty)
234 da_pyobj *me = (da_pyobj *)ty->tp_alloc(ty, 0);
236 return ((PyObject *)me);
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)
244 static char *kwlist[] = { "sequence", 0 };
246 if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O:new", kwlist, &init) ||
247 (init && da_insert((PyObject *)me, init, 0, 0)))
252 static void da_pydealloc(PyObject *me)
255 PyObject **v = DA(DA_V(me));
256 size_t n = DA_LEN(DA_V(me));
258 for (i = 0; i < n; i++) Py_DECREF(v[i]);
259 DA_DESTROY(DA_V(me));
262 static Py_ssize_t da_pylength(PyObject *me)
263 { return (DA_LEN(DA_V(me))); }
265 static int da_pytraverse(PyObject *me, visitproc proc, void *arg)
268 PyObject **v = DA(DA_V(me));
269 size_t n = DA_LEN(DA_V(me));
272 for (i = 0; i < n; i++) {
273 if ((err = proc(v[i], arg)) != 0)
279 static int da_pyclear(PyObject *me)
281 range_dec(DA(DA_V(me)), DA(DA_V(me)) + DA_LEN(DA_V(me)));
286 static PyObject *da_pyconcat(PyObject *me, PyObject *other)
288 PyObject *x = da_new(&da_pytype);
289 PyObject **items = DA(DA_V(me));
290 size_t n = DA_LEN(DA_V(me));
292 da_doinsert(x, items, n, 0, 0);
293 if (da_insert(x, other, n, n)) {
300 static PyObject *da_pyrepeat(PyObject *me, Py_ssize_t times)
302 PyObject *x = da_new(&da_pytype);
303 PyObject **items = DA(DA_V(me)), **dest;
304 size_t n = DA_LEN(DA_V(me));
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);
315 static PyObject *da_pygetitem(PyObject *me, Py_ssize_t i)
319 if (i < 0 || i >= DA_LEN(DA_V(me))) {
320 PyErr_SetString(PyExc_IndexError, "index out of range");
328 static PyObject *da_pygetslice(PyObject *me, Py_ssize_t i, Py_ssize_t j)
332 if (i < 0 || j < i || DA_LEN(DA_V(me)) < j) {
333 PyErr_SetString(PyExc_IndexError, "bad slice");
336 x = da_new(&da_pytype);
337 da_doinsert(x, DA(DA_V(me)) + i, j - i, 0, 0);
341 static int da_pyputitem(PyObject *me, Py_ssize_t i, PyObject *x)
345 if (i < 0 || i >= DA_LEN(DA_V(me))) {
346 PyErr_SetString(PyExc_IndexError, "index out of range");
349 p = DA(DA_V(me)) + i;
356 static int da_pyputslice(PyObject *me, Py_ssize_t i, Py_ssize_t j,
358 { return (da_insert(me, x, i, j)); }
360 static int da_pycontainsp(PyObject *me, PyObject *x)
362 PyObject **items = DA(DA_V(me));
363 size_t n = DA_LEN(DA_V(me));
367 for (i = 0; i < n; i++) {
368 if (PyObject_Cmp(items[i], x, &rc))
376 static PyObject *da_pyrepr(PyObject *me)
379 PyObject *s, *rc = 0;
384 dstr_puts(&d, "Array([");
385 for (i = 0; i < DA_LEN(DA_V(me)); i++) {
386 if ((s = PyObject_Repr(DA(DA_V(me))[i])) == 0 ||
387 PyString_AsStringAndSize(s, &p, &n)) {
391 if (i) dstr_puts(&d, ", ");
396 rc = PyString_FromStringAndSize(d.buf, d.len);
402 static PyObject *da_pyappend(PyObject *me, PyObject *seq)
404 size_t n = DA_LEN(DA_V(me));
405 if (da_insert(me, seq, n, n)) return (0);
409 static PyObject *da_pyiprepeat(PyObject *me, Py_ssize_t times)
411 PyObject **items, **dest;
412 size_t n = DA_LEN(DA_V(me));
416 PyErr_SetString(PyExc_ValueError, "multiplier must be nonnegative");
420 items = DA(DA_V(me));
421 range_dec(items, items + n);
426 DA_ENSURE(DA_V(me), n * times);
427 items = DA(DA_V(me));
428 for (i = 0, dest = items + n; i < times; i++, dest += n)
429 memcpy(dest, items, n * sizeof(PyObject *));
430 range_inc(items + n, dest);
431 DA_UNSAFE_EXTEND(DA_V(me), n * times);
435 static PyObject *da_pyget(PyObject *me, PyObject *index)
437 if (PySlice_Check(index)) {
438 Py_ssize_t start, stop, step, len;
443 if (PySlice_GetIndicesEx((PySliceObject *)index, DA_LEN(DA_V(me)),
444 &start, &stop, &step, &len))
446 if (step == 1) return (da_pygetslice(me, start, stop));
447 v = da_new(&da_pytype);
448 DA_ENSURE(DA_V(v), len);
450 ww = DA(DA_V(me)) + start;
451 DA_UNSAFE_EXTEND(DA_V(v), len);
455 vv++; ww += step; len--;
457 return ((PyObject *)v);
461 if ((i = PyInt_AsLong(index)) == -1 && PyErr_Occurred()) return (0);
462 return (da_pygetitem(me, i));
466 static int da_pyput(PyObject *me, PyObject *index, PyObject *x)
468 if (PySlice_Check(index)) {
469 Py_ssize_t start, stop, step, len;
475 if (PySlice_GetIndicesEx((PySliceObject *)index, DA_LEN(DA_V(me)),
476 &start, &stop, &step, &len))
478 if (step == 1) return (da_insert(me, x, start, stop));
479 if (getseq(&x, &vv, &n)) return (-1);
481 PyErr_SetString(PyExc_ValueError, "wrong number of items");
485 g = gg = xmalloc(len * sizeof(PyObject *));
486 ww = DA(DA_V(me)) + start;
488 *gg++ = *ww; *ww = *vv++;
499 if ((i = PyInt_AsLong(index)) == -1 && PyErr_Occurred()) return (-1);
500 return (da_pyputitem(me, i, x));
504 static PyObject *da_pyiter(PyObject *me)
506 daiter_pyobj *i = PyObject_NEW(daiter_pyobj, &daiter_pytype);
507 i->da = me; Py_INCREF(me);
509 return ((PyObject *)i);
512 static PyObject *dameth_push(PyObject *me, PyObject *arg)
516 if (!PyArg_ParseTuple(arg, "O:push", &x)) return (0);
518 DA_PUSH(DA_V(me), x);
522 static PyObject *dameth_pop(PyObject *me, PyObject *arg)
524 PyObject *x = Py_None;
526 if (!PyArg_ParseTuple(arg, ":pop")) return (0);
528 x = DA_POP(DA_V(me));
529 CATCH switch (exc_type) {
531 PyErr_SetString(PyExc_ValueError, "stack underflow");
539 static PyObject *dameth_unshift(PyObject *me, PyObject *arg)
543 if (!PyArg_ParseTuple(arg, "O:unshift", &x)) return (0);
545 DA_UNSHIFT(DA_V(me), x);
549 static PyObject *dameth_shift(PyObject *me, PyObject *arg)
551 PyObject *x = Py_None;
553 if (!PyArg_ParseTuple(arg, ":shift")) return (0);
555 x = DA_SHIFT(DA_V(me));
556 CATCH switch (exc_type) {
558 PyErr_SetString(PyExc_ValueError, "stack underflow");
566 static PyObject *dameth_tidy(PyObject *me, PyObject *arg)
568 if (!PyArg_ParseTuple(arg, ":tidy")) return (0);
573 static PyMethodDef da_pymethods[] = {
574 #define METHNAME(func) dameth_##func
575 METH (push, "A.push(X): [A, B, ..., W], X -> [A, B, ..., W, X]")
576 METH (pop, "A.pop() -> X: [A, B, ..., W, X] -> [A, B, ..., W]")
577 METH (unshift, "A.unshift(X): [A, B, ..., W], X -> [X, A, ..., W]")
578 METH (shift, "A.shift() -> X: [X, A, ..., W] -> [A, ..., W], X")
579 METH (tidy, "A.tidy()")
584 static PySequenceMethods da_pysequence = {
585 da_pylength, /* @sq_length@ */
586 da_pyconcat, /* @sq_concat@ */
587 da_pyrepeat, /* @sq_repeat@ */
588 da_pygetitem, /* @sq_item@ */
589 da_pygetslice, /* @sq_slice@ */
590 da_pyputitem, /* @sq_ass_item@ */
591 da_pyputslice, /* @sq_ass_slice@ */
592 da_pycontainsp, /* @sq_contains@ */
593 da_pyappend, /* @sq_inplace_concat@ */
594 da_pyiprepeat /* @sq_inplace_repeat@ */
597 static PyMappingMethods da_pymapping = {
598 da_pylength, /* @mp_length@ */
599 da_pyget, /* @mp_subscript@ */
600 da_pyput /* @mp_ass_subscript@ */
603 PyTypeObject da_pytype = {
604 PyObject_HEAD_INIT(0) 0, /* Header */
605 "mLib.Array", /* @tp_name@ */
606 sizeof(da_pyobj), /* @tp_basicsize@ */
607 0, /* @tp_itemsize@ */
609 da_pydealloc, /* @tp_dealloc@ */
611 0, /* @tp_getattr@ */
612 0, /* @tp_setattr@ */
613 0, /* @tp_compare@ */
614 da_pyrepr, /* @tp_repr@ */
615 0, /* @tp_as_number@ */
616 &da_pysequence, /* @tp_as_sequence@ */
617 &da_pymapping, /* @tp_as_mapping@ */
620 &da_pyrepr, /* @tp_str@ */
621 0, /* @tp_getattro@ */
622 0, /* @tp_setattro@ */
623 0, /* @tp_as_buffer@ */
624 Py_TPFLAGS_DEFAULT | /* @tp_flags@ */
628 "Double-ended array type.",
630 da_pytraverse, /* @tp_traverse@ */
631 da_pyclear, /* @tp_clear@ */
632 0, /* @tp_richcompare@ */
633 0, /* @tp_weaklistoffset@ */
634 da_pyiter, /* @tp_iter@ */
635 0, /* @tp_iternext@ */
636 da_pymethods, /* @tp_methods@ */
637 0, /* @tp_members@ */
641 0, /* @tp_descr_get@ */
642 0, /* @tp_descr_set@ */
643 0, /* @tp_dictoffset@ */
644 da_pyinit, /* @tp_init@ */
645 PyType_GenericAlloc, /* @tp_alloc@ */
646 da_pynew, /* @tp_new@ */
651 /*----- Initialization ----------------------------------------------------*/
653 void da_pysetup(void)
654 { PyType_Ready(&da_pytype); PyType_Ready(&daiter_pytype); }
656 /*----- That's all, folks -------------------------------------------------*/