| 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 ---------------------------------------------------- |