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#
# Genmodule - A python program to help you build (template) modules.
#
# Usage:
#
# o = genmodule.object()
# o.name = 'dwarve object'
# o.abbrev = 'dw'
# o.funclist = ['new', 'dealloc', 'getattr', 'setattr']
# o.methodlist = ['dig']
#
# m = genmodule.module()
# m.name = 'beings'
# m.abbrev = 'be'
# m.methodlist = ['newdwarve']
# m.objects = [o]
#
# genmodule.write(sys.stdout, m)
#
import sys
import os
import varsubst
error = 'genmodule.error'
#
# Names of functions in the object-description struct.
#
FUNCLIST = ['new', 'tp_dealloc', 'tp_print', 'tp_getattr', 'tp_setattr',
'tp_compare', 'tp_repr', 'tp_hash', 'tp_call', 'tp_str']
TYPELIST = ['tp_as_number', 'tp_as_sequence', 'tp_as_mapping', 'structure']
#
# writer is a base class for the object and module classes
# it contains code common to both.
#
class writer:
def __init__(self):
self._subst = None
def makesubst(self):
if not self._subst:
if 'abbrev' not in self.__dict__:
self.abbrev = self.name
self.Abbrev = self.abbrev[0].upper()+self.abbrev[1:]
subst = varsubst.Varsubst(self.__dict__)
subst.useindent(1)
self._subst = subst.subst
def addcode(self, name, fp):
ifp = self.opentemplate(name)
self.makesubst()
d = ifp.read()
d = self._subst(d)
fp.write(d)
def opentemplate(self, name):
for p in sys.path:
fn = os.path.join(p, name)
if os.path.exists(fn):
return open(fn, 'r')
fn = os.path.join(p, 'Templates')
fn = os.path.join(fn, name)
if os.path.exists(fn):
return open(fn, 'r')
raise error('Template '+name+' not found for '+self._type+' '+ \
self.name)
class module(writer):
_type = 'module'
def writecode(self, fp):
self.addcode('copyright', fp)
self.addcode('module_head', fp)
for o in self.objects:
o.writehead(fp)
for o in self.objects:
o.writebody(fp)
new_ml = ''
for fn in self.methodlist:
self.method = fn
self.addcode('module_method', fp)
new_ml = new_ml + (
'{"%s",\t(PyCFunction)%s_%s,\tMETH_VARARGS,\t%s_%s__doc__},\n'
%(fn, self.abbrev, fn, self.abbrev, fn))
self.methodlist = new_ml
self.addcode('module_tail', fp)
class object(writer):
_type = 'object'
def __init__(self):
self.typelist = []
self.methodlist = []
self.funclist = ['new']
writer.__init__(self)
def writecode(self, fp):
self.addcode('copyright', fp)
self.writehead(fp)
self.writebody(fp)
def writehead(self, fp):
self.addcode('object_head', fp)
def writebody(self, fp):
new_ml = ''
for fn in self.methodlist:
self.method = fn
self.addcode('object_method', fp)
new_ml = new_ml + (
'{"%s",\t(PyCFunction)%s_%s,\tMETH_VARARGS,\t%s_%s__doc__},\n'
%(fn, self.abbrev, fn, self.abbrev, fn))
self.methodlist = new_ml
self.addcode('object_mlist', fp)
# Add getattr if we have methods
if self.methodlist and not 'tp_getattr' in self.funclist:
self.funclist.insert(0, 'tp_getattr')
for fn in FUNCLIST:
setattr(self, fn, '0')
#
# Special case for structure-access objects: put getattr in the
# list of functions but don't generate code for it directly,
# the code is obtained from the object_structure template.
# The same goes for setattr.
#
if 'structure' in self.typelist:
if 'tp_getattr' in self.funclist:
self.funclist.remove('tp_getattr')
if 'tp_setattr' in self.funclist:
self.funclist.remove('tp_setattr')
self.tp_getattr = self.abbrev + '_getattr'
self.tp_setattr = self.abbrev + '_setattr'
for fn in self.funclist:
self.addcode('object_'+fn, fp)
setattr(self, fn, '%s_%s'%(self.abbrev, fn[3:]))
for tn in TYPELIST:
setattr(self, tn, '0')
for tn in self.typelist:
self.addcode('object_'+tn, fp)
setattr(self, tn, '&%s_%s'%(self.abbrev, tn[3:]))
self.addcode('object_tail', fp)
def write(fp, obj):
obj.writecode(fp)
if __name__ == '__main__':
o = object()
o.name = 'dwarve object'
o.abbrev = 'dw'
o.funclist = ['new', 'tp_dealloc']
o.methodlist = ['dig']
m = module()
m.name = 'beings'
m.abbrev = 'be'
m.methodlist = ['newdwarve']
m.objects = [o]
write(sys.stdout, m)
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