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[mLib-python] / sym.pyx
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1### -*-pyrex-*-
2###
3### Symbol table, using universal hashing
4###
5### (c) 2005 Straylight/Edgeware
6###
20bce5e9 7
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8###----- Licensing notice ---------------------------------------------------
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.
16###
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.
21###
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.
20bce5e9 25
579d0169 26cdef struct _sym_entry:
20bce5e9 27 sym_base _b
28 PyObject *v
29
579d0169 30cdef class SymTable (Mapping):
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31 """
32 SymTable([DICT], **KW)
33
34 A mapping keyed by strings.
35 """
20bce5e9 36 cdef sym_table _t
579d0169 37 cdef int _init(me) except -1:
20bce5e9 38 sym_create(&me._t)
579d0169 39 return 0
40 cdef void *_find(me, object key, unsigned *f) except NULL:
41 cdef void *p
78911cdb 42 cdef Py_ssize_t n
579d0169 43 cdef _sym_entry *e
704500e1 44 PyObject_AsReadBuffer(key, <cvp *>&p, &n)
20bce5e9 45 if f:
579d0169 46 f[0] = 0
47 e = <_sym_entry *>sym_find(&me._t, <char *>p, n, PSIZEOF(e), f)
48 if not f[0]:
49 e.v = NULL
20bce5e9 50 else:
579d0169 51 e = <_sym_entry *>sym_find(&me._t, <char *>p, n, 0, NULL)
52 return <void *>e
53 cdef object _key(me, void *e):
54 return PyString_FromStringAndSize(SYM_NAME(e), SYM_LEN(e))
55 cdef object _value(me, void *e):
56 cdef _sym_entry *ee
57 ee = <_sym_entry *>e
58 Py_INCREF(ee.v)
59 return <object>ee.v
d8d81d1b 60 cdef void _setval(me, void *e, object val):
579d0169 61 cdef _sym_entry *ee
62 ee = <_sym_entry *>e
63 if ee.v:
64 Py_DECREF(ee.v)
65 ee.v = <PyObject *>v
66 Py_INCREF(ee.v)
67 cdef void _del(me, void *e):
68 cdef _sym_entry *ee
69 ee = <_sym_entry *>e
70 if ee.v:
71 Py_DECREF(ee.v)
72 sym_remove(&me._t, <void *>ee)
73 cdef _MapIterator _iter(me):
74 return _SymIter(me)
20bce5e9 75
579d0169 76cdef class _SymIter (_MapIterator):
77 cdef SymTable t
78 cdef sym_iter i
6deaef47 79 def __cinit__(me, SymTable t not None):
579d0169 80 me.t = t
81 sym_mkiter(&me.i, &me.t._t)
82 cdef void *_next(me):
83 return sym_next(&me.i)
20bce5e9 84
5b1830f3 85###----- That's all, folks --------------------------------------------------