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1 | # -*-pyrex-*- |
2 | # |
3 | # $Id$ |
4 | # |
5 | # Line buffering |
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 | LBUF_CRLF = _LBUF_CRLF |
29 | LBUF_STRICTCRLF = _LBUF_STRICTCRLF |
30 | |
31 | cdef class LineBuffer: |
32 | cdef lbuf b |
33 | cdef _line |
34 | cdef _eof |
35 | def __new__(me, lineproc = None, eofproc = None, *hunoz, **hukairz): |
36 | lbuf_init(&me.b, _lbfunc, <void *>me) |
37 | me._line = _checkcallable(lineproc, 'line proc') |
38 | me._eof = _checkcallable(eofproc, 'eof proc') |
39 | def __dealloc__(me): |
40 | lbuf_destroy(&me.b) |
41 | property activep: |
42 | def __get__(me): |
43 | return _tobool(me.b.f & LBUF_ENABLE) |
44 | property delim: |
45 | def __get__(me): |
46 | if me.b.delim == _LBUF_CRLF or me.b.delim == _LBUF_STRICTCRLF: |
47 | return me.b.delim |
48 | else: |
49 | return chr(me.b.delim) |
50 | def __set__(me, d): |
51 | if d == _LBUF_CRLF or d == _LBUF_STRICTCRLF: |
52 | me.b.delim = d |
53 | else: |
54 | me.b.delim = ord(d) |
55 | property size: |
56 | def __get__(me): |
57 | return me.b.sz |
58 | def __set__(me, sz): |
59 | if sz <= 0: |
60 | raise TypeError, 'size must be positive' |
61 | lbuf_setsize(&me.b, sz) |
62 | property lineproc: |
63 | def __get__(me): |
64 | return me._line |
65 | def __set__(me, proc): |
66 | me._line = _checkcallable(proc, 'line proc') |
67 | def __del__(me): |
68 | me._line = None |
69 | property eofproc: |
70 | def __get__(me): |
71 | return me._eof |
72 | def __set__(me, proc): |
73 | me._eof = _checkcallable(proc, 'eof proc') |
74 | def __del__(me): |
75 | me._eof = None |
76 | def enable(me): |
77 | if me.b.f & LBUF_ENABLE: |
78 | raise ValueError, 'already enabled' |
79 | me.b.f = me.b.f | LBUF_ENABLE |
80 | me.enabled() |
81 | return me |
82 | def disable(me): |
83 | if not (me.b.f & LBUF_ENABLE): |
84 | raise ValueError, 'already disabled' |
85 | me.b.f = me.b.f & ~LBUF_ENABLE |
86 | me.disabled() |
87 | return me |
88 | def close(me): |
89 | if not (me.b.f & LBUF_ENABLE): |
90 | raise ValueError, 'buffer disabled' |
91 | lbuf_close(&me.b) |
92 | return me |
93 | property free: |
94 | def __get__(me): |
95 | cdef char *p |
96 | return lbuf_free(&me.b, &p) |
97 | def flush(me, str): |
98 | cdef int len |
99 | cdef char *p |
100 | cdef char *q |
101 | cdef size_t n |
102 | PyString_AsStringAndSize(str, &p, &len) |
103 | while len > 0: |
104 | n = lbuf_free(&me.b, &q) |
105 | if n > len: |
106 | n = len |
107 | memcpy(q, p, n) |
108 | p = p + n |
109 | len = len - n |
110 | if not (me.b.f & LBUF_ENABLE): |
111 | break |
112 | lbuf_flush(&me.b, q, n) |
113 | return PyString_FromStringAndSize(p, len) |
114 | def enabled(me): |
115 | pass |
116 | def disabled(me): |
117 | pass |
118 | def line(me, line): |
119 | return _maybecall(me._line, (line,)) |
120 | def eof(me): |
121 | return _maybecall(me._eof, ()) |
122 | |
123 | cdef void _lbfunc(char *s, size_t n, void *arg): |
124 | cdef LineBuffer sb |
125 | sb = <LineBuffer>arg |
126 | if s is NULL: |
127 | sb.eof() |
128 | else: |
129 | sb.line(PyString_FromStringAndSize(s, n)) |
130 | |
131 | #----- That's all, folks ---------------------------------------------------- |