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5b1830f3 MW |
1 | ### -*-pyrex-*- |
2 | ### | |
3 | ### Selecting packet-buffer | |
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 | |
26 | cdef class SelPacketBuffer: | |
27 | cdef selpk p | |
28 | cdef _packet | |
29 | cdef _eof | |
376ad06d | 30 | def __cinit__(me, fd, packetproc = None, eofproc = None, *hunoz, **hukairz): |
579d0169 | 31 | selpk_init(&me.p, &_sel, _getfd(fd), _selpkfunc, <void *>me) |
32 | selpk_disable(&me.p) | |
33 | me._packet = _checkcallable(packetproc, 'packet proc') | |
34 | me._eof = _checkcallable(eofproc, 'eof proc') | |
35 | def __dealloc__(me): | |
36 | selpk_destroy(&me.p) | |
37 | property activep: | |
38 | def __get__(me): | |
39 | return _to_bool(me.p.pk.f & PKBUF_ENABLE) | |
40 | property fd: | |
41 | def __get__(me): | |
42 | return me.p.reader.fd | |
43 | property want: | |
44 | def __get__(me): | |
45 | return me.p.pk.want | |
46 | def __set__(me, n): | |
47 | if n <= 0: | |
48 | raise TypeError, 'size must be positive' | |
49 | selpk_want(&me.p, n) | |
50 | property lineproc: | |
51 | def __get__(me): | |
52 | return me._line | |
53 | def __set__(me, proc): | |
54 | me._line = _checkcallable(proc, 'line proc') | |
55 | def __del__(me): | |
56 | me._line = None | |
57 | property eofproc: | |
58 | def __get__(me): | |
59 | return me._eof | |
60 | def __set__(me, proc): | |
61 | me._eof = _checkcallable(proc, 'eof proc') | |
62 | def __del__(me): | |
63 | me._eof = None | |
64 | def enable(me): | |
65 | if me.p.pk.f & PKBUF_ENABLE: | |
66 | raise ValueError, 'already enabled' | |
67 | selpk_enable(&me.p) | |
68 | me.enabled() | |
69 | return me | |
70 | def disable(me): | |
71 | if not (me.p.pk.f & PKBUF_ENABLE): | |
72 | raise ValueError, 'already disabled' | |
73 | selpk_disable(&me.p) | |
74 | me.disabled() | |
75 | return me | |
76 | def enabled(me): | |
77 | pass | |
78 | def disabled(me): | |
79 | pass | |
80 | def packet(me, pk): | |
81 | return _maybecall(me._packet, (pk,)) | |
82 | def eof(me): | |
83 | return _maybecall(me._eof, ()) | |
84 | ||
b51b6cf0 MW |
85 | cdef void _selpkfunc(unsigned char *p, size_t n, pkbuf *pk, |
86 | size_t *keep, void *arg): | |
579d0169 | 87 | cdef SelPacketBuffer pb |
88 | cdef void *rp | |
89 | cdef int rn | |
90 | pb = <SelPacketBuffer>arg | |
91 | if p is NULL: | |
92 | pb.eof() | |
93 | else: | |
94 | r = pb.packet(PyString_FromStringAndSize(<char *>p, n)) | |
95 | if r is not None: | |
96 | PyObject_AsReadBuffer(r, &rp, &rn) | |
97 | if rn > n: | |
98 | raise ValueError, 'remaining buffer too large' | |
99 | if rn: | |
100 | memcpy(p + n - rn, rp, rn) | |
101 | keep[0] = rn | |
102 | ||
5b1830f3 | 103 | ###----- That's all, folks -------------------------------------------------- |