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5b1830f3 MW |
1 | ### -*-pyrex-*- |
2 | ### | |
3 | ### Line buffering | |
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 | LBUF_CRLF = _LBUF_CRLF | |
27 | LBUF_STRICTCRLF = _LBUF_STRICTCRLF | |
28 | ||
29 | cdef class LineBuffer: | |
30 | cdef lbuf b | |
31 | cdef _line | |
32 | cdef _eof | |
376ad06d | 33 | def __cinit__(me, lineproc = None, eofproc = None, *hunoz, **hukairz): |
579d0169 | 34 | lbuf_init(&me.b, _lbfunc, <void *>me) |
35 | me._line = _checkcallable(lineproc, 'line proc') | |
36 | me._eof = _checkcallable(eofproc, 'eof proc') | |
37 | def __dealloc__(me): | |
38 | lbuf_destroy(&me.b) | |
39 | property activep: | |
40 | def __get__(me): | |
41 | return _tobool(me.b.f & LBUF_ENABLE) | |
42 | property delim: | |
43 | def __get__(me): | |
44 | if me.b.delim == _LBUF_CRLF or me.b.delim == _LBUF_STRICTCRLF: | |
45 | return me.b.delim | |
46 | else: | |
47 | return chr(me.b.delim) | |
48 | def __set__(me, d): | |
49 | if d == _LBUF_CRLF or d == _LBUF_STRICTCRLF: | |
50 | me.b.delim = d | |
51 | else: | |
52 | me.b.delim = ord(d) | |
53 | property size: | |
54 | def __get__(me): | |
55 | return me.b.sz | |
56 | def __set__(me, sz): | |
57 | if sz <= 0: | |
58 | raise TypeError, 'size must be positive' | |
59 | lbuf_setsize(&me.b, sz) | |
60 | property lineproc: | |
61 | def __get__(me): | |
62 | return me._line | |
63 | def __set__(me, proc): | |
64 | me._line = _checkcallable(proc, 'line proc') | |
65 | def __del__(me): | |
66 | me._line = None | |
67 | property eofproc: | |
68 | def __get__(me): | |
69 | return me._eof | |
70 | def __set__(me, proc): | |
71 | me._eof = _checkcallable(proc, 'eof proc') | |
72 | def __del__(me): | |
73 | me._eof = None | |
74 | def enable(me): | |
75 | if me.b.f & LBUF_ENABLE: | |
76 | raise ValueError, 'already enabled' | |
77 | me.b.f = me.b.f | LBUF_ENABLE | |
78 | me.enabled() | |
79 | return me | |
80 | def disable(me): | |
81 | if not (me.b.f & LBUF_ENABLE): | |
82 | raise ValueError, 'already disabled' | |
83 | me.b.f = me.b.f & ~LBUF_ENABLE | |
84 | me.disabled() | |
85 | return me | |
86 | def close(me): | |
87 | if not (me.b.f & LBUF_ENABLE): | |
88 | raise ValueError, 'buffer disabled' | |
89 | lbuf_close(&me.b) | |
90 | return me | |
91 | property free: | |
92 | def __get__(me): | |
93 | cdef char *p | |
94 | return lbuf_free(&me.b, &p) | |
95 | def flush(me, str): | |
96 | cdef int len | |
97 | cdef char *p | |
98 | cdef char *q | |
99 | cdef size_t n | |
100 | PyString_AsStringAndSize(str, &p, &len) | |
101 | while len > 0: | |
102 | n = lbuf_free(&me.b, &q) | |
103 | if n > len: | |
104 | n = len | |
105 | memcpy(q, p, n) | |
106 | p = p + n | |
107 | len = len - n | |
108 | if not (me.b.f & LBUF_ENABLE): | |
109 | break | |
110 | lbuf_flush(&me.b, q, n) | |
111 | return PyString_FromStringAndSize(p, len) | |
112 | def enabled(me): | |
113 | pass | |
114 | def disabled(me): | |
115 | pass | |
116 | def line(me, line): | |
117 | return _maybecall(me._line, (line,)) | |
118 | def eof(me): | |
119 | return _maybecall(me._eof, ()) | |
120 | ||
121 | cdef void _lbfunc(char *s, size_t n, void *arg): | |
122 | cdef LineBuffer sb | |
123 | sb = <LineBuffer>arg | |
124 | if s is NULL: | |
125 | sb.eof() | |
126 | else: | |
127 | sb.line(PyString_FromStringAndSize(s, n)) | |
128 | ||
5b1830f3 | 129 | ###----- That's all, folks -------------------------------------------------- |