Commit | Line | Data |
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20bce5e9 | 1 | /* -*-c-*- |
2 | * | |
20bce5e9 | 3 | * Atom stuff |
4 | * | |
5 | * (c) 2005 Straylight/Edgeware | |
6 | */ | |
7 | ||
d8d81d1b | 8 | /*----- Licensing notice --------------------------------------------------* |
20bce5e9 | 9 | * |
10 | * This file is part of the Python interface to mLib. | |
11 | * | |
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. | |
d8d81d1b | 16 | * |
20bce5e9 | 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. | |
d8d81d1b | 21 | * |
20bce5e9 | 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. | |
25 | */ | |
26 | ||
27 | /*----- Header files ------------------------------------------------------*/ | |
28 | ||
29 | #include <Python.h> | |
30 | ||
31 | #include <mLib/atom.h> | |
32 | #include <mLib/assoc.h> | |
33 | #include <mLib/dstr.h> | |
34 | ||
35 | #include "atom.h" | |
36 | #include "grim.h" | |
37 | ||
38 | /*----- Data structures ---------------------------------------------------*/ | |
39 | ||
20bce5e9 | 40 | typedef struct entry { |
41 | assoc_base _b; | |
42 | PyObject *a; | |
43 | } entry; | |
44 | ||
45 | /*----- Static variables --------------------------------------------------*/ | |
46 | ||
47 | static assoc_table obarray; | |
48 | ||
49 | /*----- Main code ---------------------------------------------------------*/ | |
50 | ||
51 | PyObject *atom_pywrap(atom *a) | |
52 | { | |
efb0bf0e MW |
53 | entry *e = 0; |
54 | atom_pyobj *ao; | |
20bce5e9 | 55 | unsigned f = 0; |
56 | ||
57 | e = assoc_find(&obarray, a, sizeof(entry), &f); | |
58 | if (!f) { | |
efb0bf0e | 59 | ao = PyObject_NEW(atom_pyobj, &atom_pytype); ao->a = a; |
20bce5e9 | 60 | e->a = (PyObject *)ao; |
d8d81d1b | 61 | } |
efb0bf0e MW |
62 | |
63 | /* If we just created the new `Atom' object, we get a reference, which | |
64 | * belongs to the `obarray' table. So when we return it to the caller, we | |
65 | * always need to increment it. | |
66 | */ | |
20bce5e9 | 67 | RETURN_OBJ(e->a); |
68 | } | |
69 | ||
70 | PyObject *atom_pyintern(PyObject *x) | |
71 | { | |
72 | atom *a; | |
73 | const void *p; | |
78911cdb | 74 | Py_ssize_t n; |
20bce5e9 | 75 | |
76 | if (ATOM_PYCHECK(x)) | |
77 | RETURN_OBJ(x); | |
78 | if (x == Py_None) | |
79 | a = atom_gensym(ATOM_GLOBAL); | |
efb0bf0e MW |
80 | else if (!TEXT_CHECK(x)) |
81 | { PyErr_SetString(PyExc_TypeError, "string wanted"); return (0); } | |
20bce5e9 | 82 | else { |
efb0bf0e | 83 | TEXT_PTRLEN(x, &p, &n); if (!p) return (0); |
20bce5e9 | 84 | a = atom_nintern(ATOM_GLOBAL, p, n); |
85 | } | |
86 | return (atom_pywrap(a)); | |
87 | } | |
88 | ||
89 | static void atom_pydealloc(PyObject *me) | |
d8d81d1b | 90 | { fprintf(stderr, "ouch! freeing atom\n"); abort(); } |
20bce5e9 | 91 | |
92 | static PyObject *atom_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw) | |
93 | { | |
efb0bf0e MW |
94 | PyObject *name = Py_None; |
95 | static const char *const kwlist[] = { "name", 0 }; | |
20bce5e9 | 96 | |
efb0bf0e | 97 | if (!PyArg_ParseTupleAndKeywords(arg, kw, "|O:new", KWLIST, &name)) |
20bce5e9 | 98 | return (0); |
99 | return (atom_pyintern(name)); | |
100 | } | |
101 | ||
102 | static PyObject *aget_name(PyObject *me, void *hunoz) | |
efb0bf0e | 103 | { return (TEXT_FROMSTRLEN(ATOM_NAME(ATOM_A(me)), ATOM_LEN(ATOM_A(me)))); } |
20bce5e9 | 104 | |
105 | static PyObject *aget_internedp(PyObject *me, void *hunoz) | |
106 | { | |
107 | PyObject *rc = (ATOM_A(me)->f & ATOMF_GENSYM) ? Py_False : Py_True; | |
108 | RETURN_OBJ(rc); | |
109 | } | |
110 | ||
111 | static PyGetSetDef atom_pygetset[] = { | |
112 | #define GETSETNAME(op, name) a##op##_##name | |
113 | GET (name, "A.name -> NAME") | |
114 | GET (internedp, "A.internedp -> BOOL") | |
115 | #undef GETSETNAME | |
116 | { 0 } | |
117 | }; | |
118 | ||
119 | static PyObject *atom_pyrichcompare(PyObject *x, PyObject *y, int op) | |
120 | { | |
121 | PyObject *rc = 0; | |
122 | ||
123 | switch (op) { | |
124 | case Py_EQ: rc = (x == y) ? Py_True : Py_False; break; | |
125 | case Py_NE: rc = (x != y) ? Py_True : Py_False; break; | |
126 | default: | |
127 | PyErr_SetString(PyExc_TypeError, "atoms are unordered"); | |
128 | return (0); | |
129 | } | |
130 | RETURN_OBJ(rc); | |
131 | } | |
132 | ||
133 | static PyObject *atom_pyrepr(PyObject *me) | |
134 | { | |
135 | PyObject *s, *sr = 0; | |
136 | PyObject *rc = 0; | |
137 | char *p; | |
78911cdb | 138 | Py_ssize_t n; |
20bce5e9 | 139 | dstr d = DSTR_INIT; |
140 | ||
141 | if ((s = aget_name(me, 0)) == 0 || | |
efb0bf0e | 142 | (sr = PyObject_Repr(s)) == 0) |
20bce5e9 | 143 | goto done; |
efb0bf0e MW |
144 | if (!TEXT_CHECK(sr)) |
145 | { PyErr_SetString(PyExc_TypeError, "string wanted"); goto done; } | |
146 | TEXT_PTRLEN(sr, &p, &n); if (!p) goto done; | |
20bce5e9 | 147 | dstr_puts(&d, "Atom("); |
148 | dstr_putm(&d, p, n); | |
149 | dstr_puts(&d, ")"); | |
efb0bf0e | 150 | rc = TEXT_FROMSTRLEN(d.buf, d.len); |
20bce5e9 | 151 | done: |
152 | Py_XDECREF(s); | |
153 | Py_XDECREF(sr); | |
154 | dstr_destroy(&d); | |
155 | return (rc); | |
156 | } | |
157 | ||
efb0bf0e MW |
158 | static Py_hash_t atom_pyhash(PyObject *me) |
159 | { Py_hash_t h = ATOM_HASH(ATOM_A(me)); if (h == -1) h = -2; return (h); } | |
20bce5e9 | 160 | |
579d0169 | 161 | PyTypeObject atom_pytype = { |
efb0bf0e | 162 | PyVarObject_HEAD_INIT(0, 0) /* Header */ |
3655f952 | 163 | "mLib.Atom", /* @tp_name@ */ |
20bce5e9 | 164 | sizeof(atom_pyobj), /* @tp_basicsize@ */ |
165 | 0, /* @tp_itemsize@ */ | |
166 | ||
167 | atom_pydealloc, /* @tp_dealloc@ */ | |
168 | 0, /* @tp_print@ */ | |
169 | 0, /* @tp_getattr@ */ | |
170 | 0, /* @tp_setattr@ */ | |
171 | 0, /* @tp_compare@ */ | |
172 | atom_pyrepr, /* @tp_repr@ */ | |
173 | 0, /* @tp_as_number@ */ | |
174 | 0, /* @tp_as_sequence@ */ | |
175 | 0, /* @tp_as_mapping@ */ | |
176 | atom_pyhash, /* @tp_hash@ */ | |
177 | 0, /* @tp_call@ */ | |
178 | atom_pyrepr, /* @tp_str@ */ | |
179 | 0, /* @tp_getattro@ */ | |
180 | 0, /* @tp_setattro@ */ | |
181 | 0, /* @tp_as_buffer@ */ | |
182 | Py_TPFLAGS_DEFAULT, /* @tp_flags@ */ | |
183 | ||
184 | /* @tp_doc@ */ | |
185 | "Atom.", | |
186 | ||
187 | 0, /* @tp_traverse@ */ | |
188 | 0, /* @tp_clear@ */ | |
189 | atom_pyrichcompare, /* @tp_richcompare@ */ | |
190 | 0, /* @tp_weaklistoffset@ */ | |
191 | 0, /* @tp_iter@ */ | |
192 | 0, /* @tp_iternexr@ */ | |
193 | 0, /* @tp_methods@ */ | |
194 | 0, /* @tp_members@ */ | |
195 | atom_pygetset, /* @tp_getset@ */ | |
196 | 0, /* @tp_base@ */ | |
197 | 0, /* @tp_dict@ */ | |
198 | 0, /* @tp_descr_get@ */ | |
199 | 0, /* @tp_descr_set@ */ | |
200 | 0, /* @tp_dictoffset@ */ | |
201 | 0, /* @tp_init@ */ | |
202 | PyType_GenericAlloc, /* @tp_alloc@ */ | |
203 | atom_pynew, /* @tp_new@ */ | |
204 | 0, /* @tp_free@ */ | |
205 | 0 /* @tp_is_gc@ */ | |
206 | }; | |
207 | ||
579d0169 | 208 | void atom_pysetup(void) |
209 | { assoc_create(&obarray); PyType_Ready(&atom_pytype); } | |
20bce5e9 | 210 | |
211 | /*----- That's all, folks -------------------------------------------------*/ |