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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
- import string
-
- 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 not self.__dict__.has_key('abbrev'):
- self.abbrev = self.name
- self.Abbrev = string.upper(self.abbrev[0])+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)
-