mdw@git.distorted.org.uk Git - mLib-python/blob - mLib/__init__.py

   1 ### -*-python-*-
   2 ###
   3 ### Setup for mLib bindings
   4 ###
   5 ### (c) 2019 Straylight/Edgeware
   6 ###
   7
   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 it
  13 ### under the terms of the GNU General Public License as published by the
  14 ### Free Software Foundation; either version 2 of the License, or (at your
  15 ### option) any later version.
  16 ###
  17 ### mLib/Python is distributed in the hope that it will be useful, but
  18 ### WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20 ### 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
  24 ### Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  25 ### USA.
  26
  27 import sys as _sys
  28 import types as _types
  29
  30 ###--------------------------------------------------------------------------
  31 ### Import the main C extension module.
  32
  33 if _sys.version_info >= (3,): from . import _base
  34 else: import _base
  35
  36 ###--------------------------------------------------------------------------
  37 ### Basic stuff.
  38
  39 ## Register our module.
  40 _base._ready(_sys.modules[__name__])
  41 def default_lostexchook(why, ty, val, tb):
  42   """`mLib.lostexchook(WHY, TY, VAL, TB)' reports lost exceptions."""
  43   _sys.stderr.write("\n\n!!! LOST EXCEPTION: %s\n" % why)
  44   _sys.excepthook(ty, val, tb)
  45   _sys.stderr.write("\n")
  46 lostexchook = default_lostexchook
  47
  48 ## For the benefit of the reporter functions, we need the program name.
  49 _base.ego(_sys.argv[0])
  50
  51 ## Initialize the module.
  52 def _init():
  53   d = globals()
  54   b = _base.__dict__;
  55   for i in b:
  56     if i[0] != '_': d[i] = b[i];
  57 _init()
  58
  59 ## A handy function for our work: add the methods of a named class to an
  60 ## existing class.  This is how we write the Python-implemented parts of our
  61 ## mostly-C types.
  62 def _augment(c, cc):
  63   for i in cc.__dict__:
  64     a = cc.__dict__[i]
  65     if type(a) is _types.MethodType:
  66       a = a.im_func
  67     elif type(a) not in (_types.FunctionType, staticmethod, classmethod):
  68       continue
  69     setattr(c, i, a)
  70
  71 ###--------------------------------------------------------------------------
  72 ### Atoms.
  73
  74 DEFAULT_ATOMTABLE = AtomTable()
  75
  76 if _sys.version_info >= (3,):
  77   def atoms(): return iter(DEFAULT_ATOMTABLE.values())
  78 else:
  79   def atoms(): return DEFAULT_ATOMTABLE.itervalues()
  80
  81 class _tmp:
  82   def __repr__(me): return "Atom(%r)" % me.name
  83   __str__ = __repr__
  84 _augment(Atom, _tmp)
  85
  86 ###--------------------------------------------------------------------------
  87 ### User-interface funtions.
  88
  89 def pquis(msg, file = _sys.stdout):
  90   "pquis(MSG, [file = sys.stdout]): write MSG, replacing `$' by program name"
  91   file.write(msg.replace("$", quis))
  92
  93 ###----- That's all, folks --------------------------------------------------