Commit | Line | Data |
---|---|---|
5b1830f3 MW |
1 | ### -*-pyrex-*- |
2 | ### | |
3 | ### Common mapping stuff | |
4 | ### | |
5 | ### (c) 2005 Straylight/Edgeware | |
6 | ### | |
579d0169 | 7 | |
5b1830f3 MW |
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. | |
579d0169 | 25 | |
579d0169 | 26 | cdef class _MapIterator: |
27 | cdef void *_next(me): | |
28 | return NULL | |
29 | ||
efb0bf0e | 30 | cdef class _Mapping: |
579d0169 | 31 | |
efb0bf0e | 32 | ## Subclasses must implement these. |
579d0169 | 33 | cdef int _init(me) except -1: |
efb0bf0e | 34 | raise TypeError('abstract class') |
579d0169 | 35 | cdef void *_find(me, object key, unsigned *f) except NULL: |
efb0bf0e | 36 | raise SystemError('unimplemented _find') |
579d0169 | 37 | cdef object _key(me, void *e): |
38 | return None | |
39 | cdef object _value(me, void *e): | |
40 | return None | |
41 | cdef void _setval(me, void *e, object val): | |
42 | pass | |
43 | cdef void _del(me, void *e): | |
44 | pass | |
45 | cdef _MapIterator _iter(me): | |
efb0bf0e | 46 | raise SystemError('unimplemented _iter') |
579d0169 | 47 | |
efb0bf0e | 48 | ## Initialization. |
579d0169 | 49 | def __init__(me, stuff = None, **kw): |
efb0bf0e MW |
50 | me._init() |
51 | me.update(stuff, **kw) | |
579d0169 | 52 | |
efb0bf0e | 53 | ## Bulk update. |
579d0169 | 54 | def update(me, stuff = None, **kw): |
addc0c37 | 55 | """D.update([MAP], **KW): insert mappings from MAP and KW""" |
579d0169 | 56 | cdef unsigned f |
57 | if stuff is None: | |
58 | pass | |
59 | elif hasattr(stuff, 'itemiter'): | |
60 | for k, v in stuff.itemiter: | |
61 | me._setval(me._find(k, &f), v) | |
62 | elif hasattr(stuff, 'keys'): | |
63 | for k in stuff.keys(): | |
64 | me._setval(me._find( k, &f), stuff[k]) | |
65 | else: | |
66 | for k, v in stuff: | |
67 | me._setval(me._find(k, &f), v) | |
68 | for k, v in kw.iteritems(): | |
69 | me._setval(me._find(k, &f), v) | |
70 | return me | |
71 | ||
efb0bf0e | 72 | ## Item access. |
579d0169 | 73 | def __getitem__(me, key): |
efb0bf0e | 74 | cdef void *e = me._find(key, NULL) |
579d0169 | 75 | return me._value(e) |
76 | def __setitem__(me, key, value): | |
77 | cdef unsigned f | |
78 | me._setval(me._find(key, &f), value) | |
79 | def __delitem__(me, key): | |
579d0169 | 80 | cdef unsigned f |
efb0bf0e | 81 | cdef void *e = me._find(key, &f) |
579d0169 | 82 | if not e: |
efb0bf0e | 83 | raise KeyError(key) |
579d0169 | 84 | me._del(e) |
85 | def get(me, key, default = None): | |
addc0c37 | 86 | """D.get(KEY, [default = None]) -> VALUE: value at KEY, or DEFAULT""" |
efb0bf0e | 87 | cdef void *e = me._find(key, NULL) |
579d0169 | 88 | if not e: |
89 | return default | |
90 | return me._value(e) | |
91 | def setdefault(me, key, default = None): | |
addc0c37 MW |
92 | """ |
93 | D.setdefault(KEY, [default = None]) -> VALUE: | |
94 | return value at key, or store DEFAULT at key and return that""" | |
579d0169 | 95 | cdef unsigned f |
efb0bf0e | 96 | cdef void *e = me._find(key, &f) |
579d0169 | 97 | if f: |
98 | return me._value(e) | |
99 | else: | |
100 | me._setval(e, default) | |
101 | return default | |
102 | def pop(me, key, default = None): | |
addc0c37 MW |
103 | """ |
104 | D.pop(KEY, [default = None]) -> VALUE: | |
105 | return value at key or DEFAULT, and remove KEY""" | |
efb0bf0e | 106 | cdef void *e = me._find(key, NULL) |
579d0169 | 107 | if not e: |
108 | return default | |
109 | rc = me._value(e) | |
110 | me._del(e) | |
111 | return rc | |
112 | def popitem(me): | |
addc0c37 | 113 | """D.popitem() -> KEY, VALUE: return and remove an association pair""" |
efb0bf0e MW |
114 | cdef _MapIterator i = me._iter() |
115 | cdef void *e = i._next() | |
579d0169 | 116 | if not e: |
efb0bf0e | 117 | raise ValueError('popitem(): table is empty') |
579d0169 | 118 | return me._key(e), me._value(e) |
119 | ||
efb0bf0e MW |
120 | ## Lists of items. |
121 | IF PYVERSION < (3,): | |
122 | cdef object _list(me, object (*func)(_Mapping m, void *e)): | |
123 | cdef _MapIterator i = me._iter() | |
124 | cdef void *e | |
125 | l = [] | |
126 | while 1: | |
127 | e = i._next() | |
128 | if not e: | |
129 | break | |
130 | l.append(func(me, e)) | |
131 | return l | |
d8d81d1b | 132 | |
efb0bf0e MW |
133 | def keys(me): |
134 | """D.keys() -> LIST: return a list of known keys""" | |
135 | return me._list(_map_key) | |
136 | def values(me): | |
137 | """D.values() -> LIST: return a list of known values""" | |
138 | return me._list(_map_value) | |
139 | def items(me): | |
140 | """D.items() -> LIST: return a list of known (KEY, VALUE) pairs""" | |
141 | return me._list(_map_item) | |
579d0169 | 142 | |
143 | def clear(me): | |
addc0c37 | 144 | """D.clear(): remove all mappings""" |
efb0bf0e | 145 | cdef _MapIterator i = me._iter() |
579d0169 | 146 | cdef void *e |
579d0169 | 147 | while 1: |
148 | e = i._next() | |
149 | if not e: | |
150 | break | |
151 | me._del(e) | |
152 | return me | |
153 | ||
efb0bf0e | 154 | ## Iteration. |
579d0169 | 155 | def __iter__(me): |
156 | return MapKeyIter(me) | |
efb0bf0e MW |
157 | IF PYVERSION >= (3,): |
158 | def keys(me): | |
159 | """D.keys() -> ITER: return iterator over keys""" | |
160 | return MapKeyIter(me) | |
161 | def values(me): | |
162 | """D.values() -> ITER: return iterator over values""" | |
163 | return MapValueIter(me) | |
164 | def items(me): | |
165 | """D.items() -> ITER: return iterator over (KEY, VALUE) pairs""" | |
166 | return MapItemIter(me) | |
167 | ELSE: | |
168 | def iterkeys(me): | |
169 | """D.iterkeys() -> ITER: return iterator over keys""" | |
170 | return MapKeyIter(me) | |
171 | def itervalues(me): | |
172 | """D.itervalues() -> ITER: return iterator over values""" | |
173 | return MapValueIter(me) | |
174 | def iteritems(me): | |
175 | """D.iteritems() -> ITER: return iterator over (KEY, VALUE) pairs""" | |
176 | return MapItemIter(me) | |
d8d81d1b | 177 | |
efb0bf0e MW |
178 | cdef class _MapIterBase: |
179 | cdef _Mapping m | |
180 | cdef object (*func)(_Mapping m, void *e) | |
579d0169 | 181 | cdef _MapIterator i |
182 | cdef int _init(me) except -1: | |
efb0bf0e MW |
183 | raise TypeError('abstract class') |
184 | def __init__(me, _Mapping m): | |
185 | me.m = m | |
579d0169 | 186 | me.i = m._iter() |
187 | me._init() | |
f9f0b46e MW |
188 | def __iter__(me): |
189 | return me | |
579d0169 | 190 | def __next__(me): |
191 | cdef void *e | |
192 | e = me.i._next() | |
193 | if not e: | |
194 | raise StopIteration | |
195 | return me.func(me.m, e) | |
efb0bf0e | 196 | cdef class MapKeyIter (_MapIterBase): |
579d0169 | 197 | cdef int _init(me) except -1: |
198 | me.func = _map_key | |
199 | return 0 | |
efb0bf0e | 200 | cdef class MapValueIter (_MapIterBase): |
579d0169 | 201 | cdef int _init(me) except -1: |
202 | me.func = _map_value | |
203 | return 0 | |
efb0bf0e | 204 | cdef class MapItemIter (_MapIterBase): |
579d0169 | 205 | cdef int _init(me) except -1: |
206 | me.func = _map_item | |
207 | return 0 | |
208 | ||
efb0bf0e | 209 | cdef object _map_key(_Mapping m, void *e): |
579d0169 | 210 | return m._key(e) |
efb0bf0e | 211 | cdef object _map_value(_Mapping m, void *e): |
579d0169 | 212 | return m._value(e) |
efb0bf0e | 213 | cdef object _map_item(_Mapping m, void *e): |
579d0169 | 214 | return m._key(e), m._value(e) |
215 | ||
5b1830f3 | 216 | ###----- That's all, folks -------------------------------------------------- |