General reorganization.

[mLib-python] / selpk.pyx

diff --git a/selpk.pyx b/selpk.pyx
new file mode 100644 (file)
index 0000000..fe85a9f
--- /dev/null
+++ b/selpk.pyx
@@ -0,0 +1,105 @@
+# -*-pyrex-*-
+#
+# $Id$
+#
+# Selecting packet-buffer
+#
+# (c) 2005 Straylight/Edgeware
+#
+
+#----- Licensing notice -----------------------------------------------------
+#
+# This file is part of the Python interface to mLib.
+#
+# mLib/Python is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+# 
+# mLib/Python is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with mLib/Python; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+cdef class SelPacketBuffer:
+  cdef selpk p
+  cdef _packet
+  cdef _eof
+  def __new__(me, fd, packetproc = None, eofproc = None, *hunoz, **hukairz):
+    selpk_init(&me.p, &_sel, _getfd(fd), _selpkfunc, <void *>me)
+    selpk_disable(&me.p)
+    me._packet = _checkcallable(packetproc, 'packet proc')
+    me._eof = _checkcallable(eofproc, 'eof proc')
+  def __dealloc__(me):
+    selpk_destroy(&me.p)
+  property activep:
+    def __get__(me):
+      return _to_bool(me.p.pk.f & PKBUF_ENABLE)
+  property fd:
+    def __get__(me):
+      return me.p.reader.fd
+  property want:
+    def __get__(me):
+      return me.p.pk.want
+    def __set__(me, n):
+      if n <= 0:
+        raise TypeError, 'size must be positive'
+      selpk_want(&me.p, n)
+  property lineproc:
+    def __get__(me):
+      return me._line
+    def __set__(me, proc):
+      me._line = _checkcallable(proc, 'line proc')
+    def __del__(me):
+      me._line = None
+  property eofproc:
+    def __get__(me):
+      return me._eof
+    def __set__(me, proc):
+      me._eof = _checkcallable(proc, 'eof proc')
+    def __del__(me):
+      me._eof = None
+  def enable(me):
+    if me.p.pk.f & PKBUF_ENABLE:
+      raise ValueError, 'already enabled'
+    selpk_enable(&me.p)
+    me.enabled()
+    return me
+  def disable(me):
+    if not (me.p.pk.f & PKBUF_ENABLE):
+      raise ValueError, 'already disabled'
+    selpk_disable(&me.p)
+    me.disabled()
+    return me
+  def enabled(me):
+    pass
+  def disabled(me):
+    pass
+  def packet(me, pk):
+    return _maybecall(me._packet, (pk,))
+  def eof(me):
+    return _maybecall(me._eof, ())
+
+cdef void _selpkfunc(unsigned char *p, size_t n, pkbuf *pk,
+                     size_t *keep, void *arg):
+  cdef SelPacketBuffer pb
+  cdef void *rp
+  cdef int rn
+  pb = <SelPacketBuffer>arg
+  if p is NULL:
+    pb.eof()
+  else:
+    r = pb.packet(PyString_FromStringAndSize(<char *>p, n))
+    if r is not None:
+      PyObject_AsReadBuffer(r, &rp, &rn)
+      if rn > n:
+        raise ValueError, 'remaining buffer too large'
+      if rn:
+        memcpy(p + n - rn, rp, rn)
+        keep[0] = rn
+
+#----- That's all, folks ----------------------------------------------------