~mdw / mLib-python / blame
| Commit | Line | Data |
|---|---|---|
| 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 -------------------------------------------------- |