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#
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
# The Original Code is "Java-Python Extension libplus (JPE-libplus)".
#
# The Initial Developer of the Original Code is Frederic Bruno Giacometti.
# Portions created by Frederic Bruno Giacometti are
# Copyright (C) 2001-2002 Frederic Bruno Giacometti. All Rights Reserved.
#
# Contributor(s): frederic.giacometti@arakne.com
#
# Acknowledgments:
# Particular gratitude is expressed to the following parties for their
# contributing support to the development of JPE-libplus:
# - The Molecular Graphics Laboratory (MGL)
# at The Scripps Research Institute (TSRI), in La Jolla, CA, USA;
# and in particular to Michel Sanner and Arthur Olson.
#
"""helper for generating C callback files
"""
import string, re, types,sys
platformname = sys.platform
winfpref = platformname == 'win32' and 'WSTDCALL ' or ''
def cb_sigargs( args):
if args == ['void']:
return 'void'
else:
result = ' '
for arg in args:
if '...' == arg:
raise NotImplementedError( arg, args)
if result != ' ':
result += ', '
result += '%s %s' % arg
return result
def cb_auxsigargs( args):
result = cb_sigargs( args)
if result == 'void':
result = ''
return result
def cb_callargs( args):
if args == ['void']:
return ''
else:
result = ' '
for arg in args:
if '...' == arg:
raise NotImplementedError( arg, args)
if result != ' ':
result += ', '
result += '%s' % arg[ 1]
return result
def cb_name( rettype, args):
def subfun( name):
return re.sub( r'\*', 'star',
re.sub( r' ', '', name))
return string.join( [subfun( rettype)]
+ [subfun( isinstance( x, types.StringType)
and x or x[ 0])
for x in args], '_'
)
def cb_interface( headername, nslots, pyargs, rettype, args, pythread):
sigargs = cb_sigargs( args)
auxsigargs = cb_auxsigargs( args)
callargs = cb_callargs( args)
cbname = cb_name( rettype, args)
result = '/* %s %s callback */\n\n' % (rettype, args)
result += '%%{\n%s %s_callback( int idx%s%s);\n\n'\
% (rettype, cbname, auxsigargs and ',' or '',
auxsigargs)
for idx in range( nslots):
result += 'static %s %s%s_%i( %s)\n' % (rettype, winfpref, cbname,
idx, sigargs)\
+ '{\n %s_callback( %i%s%s);\n}\n\n'\
% (cbname, idx, callargs and ',' or '', callargs)
result += 'static %s_f %s_array[] = {\n' % ((cbname,) * 2)
for idx in range( nslots):
result += ' %s_%i,\n' % (cbname, idx)
result += '};\n\n'
result += '#define %s_DIM (sizeof %s_array / sizeof *%s_array)\n\n'\
% ((cbname,) * 3)
result += 'static %s_f %s_array_get( int idx)\n' % ((cbname,) * 2)
result += '{\n assert( 0 <= idx);\n assert( idx < %s_DIM);\n' % cbname
result += ' return %s_array[ idx];\n}\n\n' % cbname
result += 'static %s %s_callback( int idx%s%s)\n{\n'\
% (rettype, cbname, auxsigargs and ',' or '', auxsigargs)
result += ' static PyObject_t s_runcallback = NULL;\n'
result += ' PyObject_t result;\n\n'
result += ' if (%s) PyEval_AcquireThread( %s);\n'\
% (pythread, pythread)
result += ' if (NOT s_runcallback)\n'\
' s_runcallback = PypImport_ModuleAttr('\
' "%s", "swigcallback");\n' % __name__
result += ' if (NOT s_runcallback) goto FUNEXIT;\n'
result += ' result = PyObject_CallFunction( s_runcallback,'\
' "si%s", "%s", idx%s%s);\n'\
% (isinstance( pyargs, types.StringType)
and (pyargs,
cbname,
callargs and ',' or '',
callargs)
or (pyargs[ 0], cbname, ',', pyargs[ 1]))
result += ' if (NOT result) goto FUNEXIT;\n'
result += ' Py_DECREF( result);\n'
result += 'FUNEXIT:\n'
result += ' if (PyErr_Occurred()) PypCallback_ProcessErr( "%s");\n'\
% cbname
result += ' if (%s) PyEval_ReleaseThread( %s);\n' % (pythread, pythread)
result += ' return;\n}\n%}\n\n'
result += '%%include gltypedef.i\n%%include %s\n' % headername
result += '%s_f %s_array_get( int idx);\n\n' % ((cbname,) * 2)
result += '%%constant int %s_dim = %s_DIM;\n' % ((cbname,) * 2)
result += '%%constant %s_f %s_NULL = NULL;\n\n' % ((cbname,) * 2)
return result
def cb_header( rettype, args):
return 'typedef %s (%s*%s_f)(%s);\n\n'\
% (rettype, winfpref, cb_name(rettype, args), cb_sigargs( args))
######################
swigfuns = {}
def swigfun( moduledef, sig, cbfun):
assert cbfun is None or callable( cbfun)
ftype = apply( cb_name, sig)
if cbfun is None:
return getattr( moduledef, '%s_NULL' % ftype)
else:
try:
flist = swigfuns[ ftype]
except KeyError:
flist = swigfuns[ ftype] = []
try:
idx = flist.index( cbfun)
except ValueError:
idx = len( flist)
nmax = getattr( moduledef, '%s_dim' % ftype)
if nmax <= idx:
raise ValueError( 'internal limit on registered python'
'callback reached', nmax, idx)
flist.append( cbfun)
assert idx < getattr( moduledef, '%s_dim' % ftype)
return getattr( moduledef, '%s_array_get' % ftype)( idx)
def swigcallback( ftype, idx, *args):
'''callback from C (callback.i)
'''
try:
return apply( swigfuns[ ftype][ idx], args)
except SystemExit:
raise
except:
import sys, traceback
traceback.print_stack()
traceback.print_exc()
sys.exit( 1)
def isswigfun( obj):
return not (obj is None or callable( obj) )
def swigptrcallback( moduledef, sig, callback):
if not isswigfun( callback):
callback = swigfun( moduledef, sig, callback)
return callback
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