579d0169 |
1 | # -*-pyrex-*- |
2 | # |
3 | # $Id$ |
4 | # |
5 | # Selecting packet-buffer |
6 | # |
7 | # (c) 2005 Straylight/Edgeware |
8 | # |
9 | |
10 | #----- Licensing notice ----------------------------------------------------- |
11 | # |
12 | # This file is part of the Python interface to mLib. |
13 | # |
14 | # mLib/Python is free software; you can redistribute it and/or modify |
15 | # it under the terms of the GNU General Public License as published by |
16 | # the Free Software Foundation; either version 2 of the License, or |
17 | # (at your option) any later version. |
18 | # |
19 | # mLib/Python is distributed in the hope that it will be useful, |
20 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | # GNU General Public License for more details. |
23 | # |
24 | # You should have received a copy of the GNU General Public License |
25 | # along with mLib/Python; if not, write to the Free Software Foundation, |
26 | # Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
27 | |
28 | cdef class SelPacketBuffer: |
29 | cdef selpk p |
30 | cdef _packet |
31 | cdef _eof |
32 | def __new__(me, fd, packetproc = None, eofproc = None, *hunoz, **hukairz): |
33 | selpk_init(&me.p, &_sel, _getfd(fd), _selpkfunc, <void *>me) |
34 | selpk_disable(&me.p) |
35 | me._packet = _checkcallable(packetproc, 'packet proc') |
36 | me._eof = _checkcallable(eofproc, 'eof proc') |
37 | def __dealloc__(me): |
38 | selpk_destroy(&me.p) |
39 | property activep: |
40 | def __get__(me): |
41 | return _to_bool(me.p.pk.f & PKBUF_ENABLE) |
42 | property fd: |
43 | def __get__(me): |
44 | return me.p.reader.fd |
45 | property want: |
46 | def __get__(me): |
47 | return me.p.pk.want |
48 | def __set__(me, n): |
49 | if n <= 0: |
50 | raise TypeError, 'size must be positive' |
51 | selpk_want(&me.p, n) |
52 | property lineproc: |
53 | def __get__(me): |
54 | return me._line |
55 | def __set__(me, proc): |
56 | me._line = _checkcallable(proc, 'line proc') |
57 | def __del__(me): |
58 | me._line = None |
59 | property eofproc: |
60 | def __get__(me): |
61 | return me._eof |
62 | def __set__(me, proc): |
63 | me._eof = _checkcallable(proc, 'eof proc') |
64 | def __del__(me): |
65 | me._eof = None |
66 | def enable(me): |
67 | if me.p.pk.f & PKBUF_ENABLE: |
68 | raise ValueError, 'already enabled' |
69 | selpk_enable(&me.p) |
70 | me.enabled() |
71 | return me |
72 | def disable(me): |
73 | if not (me.p.pk.f & PKBUF_ENABLE): |
74 | raise ValueError, 'already disabled' |
75 | selpk_disable(&me.p) |
76 | me.disabled() |
77 | return me |
78 | def enabled(me): |
79 | pass |
80 | def disabled(me): |
81 | pass |
82 | def packet(me, pk): |
83 | return _maybecall(me._packet, (pk,)) |
84 | def eof(me): |
85 | return _maybecall(me._eof, ()) |
86 | |
87 | cdef void _selpkfunc(unsigned char *p, size_t n, pkbuf *pk, |
88 | size_t *keep, void *arg): |
89 | cdef SelPacketBuffer pb |
90 | cdef void *rp |
91 | cdef int rn |
92 | pb = <SelPacketBuffer>arg |
93 | if p is NULL: |
94 | pb.eof() |
95 | else: |
96 | r = pb.packet(PyString_FromStringAndSize(<char *>p, n)) |
97 | if r is not None: |
98 | PyObject_AsReadBuffer(r, &rp, &rn) |
99 | if rn > n: |
100 | raise ValueError, 'remaining buffer too large' |
101 | if rn: |
102 | memcpy(p + n - rn, rp, rn) |
103 | keep[0] = rn |
104 | |
105 | #----- That's all, folks ---------------------------------------------------- |