| 1 | #
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| 2 | # Genmodule - A python program to help you build (template) modules.
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| 3 | #
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| 4 | # Usage:
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| 5 | #
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| 6 | # o = genmodule.object()
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| 7 | # o.name = 'dwarve object'
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| 8 | # o.abbrev = 'dw'
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| 9 | # o.funclist = ['new', 'dealloc', 'getattr', 'setattr']
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| 10 | # o.methodlist = ['dig']
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| 11 | #
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| 12 | # m = genmodule.module()
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| 13 | # m.name = 'beings'
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| 14 | # m.abbrev = 'be'
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| 15 | # m.methodlist = ['newdwarve']
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| 16 | # m.objects = [o]
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| 17 | #
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| 18 | # genmodule.write(sys.stdout, m)
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| 19 | #
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| 20 | import sys
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| 21 | import os
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| 22 | import varsubst
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| 23 |
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| 24 | error = 'genmodule.error'
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| 25 |
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| 26 | #
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| 27 | # Names of functions in the object-description struct.
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| 28 | #
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| 29 | FUNCLIST = ['new', 'tp_dealloc', 'tp_print', 'tp_getattr', 'tp_setattr',
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| 30 | 'tp_compare', 'tp_repr', 'tp_hash', 'tp_call', 'tp_str']
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| 31 | TYPELIST = ['tp_as_number', 'tp_as_sequence', 'tp_as_mapping', 'structure']
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| 32 |
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| 33 | #
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| 34 | # writer is a base class for the object and module classes
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| 35 | # it contains code common to both.
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| 36 | #
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| 37 | class writer:
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| 38 | def __init__(self):
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| 39 | self._subst = None
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| 40 |
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| 41 | def makesubst(self):
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| 42 | if not self._subst:
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| 43 | if not self.__dict__.has_key('abbrev'):
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| 44 | self.abbrev = self.name
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| 45 | self.Abbrev = self.abbrev[0].upper()+self.abbrev[1:]
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| 46 | subst = varsubst.Varsubst(self.__dict__)
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| 47 | subst.useindent(1)
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| 48 | self._subst = subst.subst
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| 49 |
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| 50 | def addcode(self, name, fp):
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| 51 | ifp = self.opentemplate(name)
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| 52 | self.makesubst()
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| 53 | d = ifp.read()
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| 54 | d = self._subst(d)
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| 55 | fp.write(d)
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| 56 |
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| 57 | def opentemplate(self, name):
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| 58 | for p in sys.path:
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| 59 | fn = os.path.join(p, name)
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| 60 | if os.path.exists(fn):
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| 61 | return open(fn, 'r')
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| 62 | fn = os.path.join(p, 'Templates')
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| 63 | fn = os.path.join(fn, name)
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| 64 | if os.path.exists(fn):
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| 65 | return open(fn, 'r')
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| 66 | raise error, 'Template '+name+' not found for '+self._type+' '+ \
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| 67 | self.name
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| 68 |
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| 69 | class module(writer):
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| 70 | _type = 'module'
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| 71 |
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| 72 | def writecode(self, fp):
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| 73 | self.addcode('copyright', fp)
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| 74 | self.addcode('module_head', fp)
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| 75 | for o in self.objects:
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| 76 | o.writehead(fp)
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| 77 | for o in self.objects:
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| 78 | o.writebody(fp)
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| 79 | new_ml = ''
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| 80 | for fn in self.methodlist:
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| 81 | self.method = fn
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| 82 | self.addcode('module_method', fp)
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| 83 | new_ml = new_ml + (
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| 84 | '{"%s",\t(PyCFunction)%s_%s,\tMETH_VARARGS,\t%s_%s__doc__},\n'
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| 85 | %(fn, self.abbrev, fn, self.abbrev, fn))
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| 86 | self.methodlist = new_ml
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| 87 | self.addcode('module_tail', fp)
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| 88 |
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| 89 | class object(writer):
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| 90 | _type = 'object'
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| 91 | def __init__(self):
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| 92 | self.typelist = []
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| 93 | self.methodlist = []
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| 94 | self.funclist = ['new']
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| 95 | writer.__init__(self)
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| 96 |
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| 97 | def writecode(self, fp):
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| 98 | self.addcode('copyright', fp)
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| 99 | self.writehead(fp)
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| 100 | self.writebody(fp)
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| 101 |
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| 102 | def writehead(self, fp):
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| 103 | self.addcode('object_head', fp)
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| 104 |
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| 105 | def writebody(self, fp):
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| 106 | new_ml = ''
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| 107 | for fn in self.methodlist:
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| 108 | self.method = fn
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| 109 | self.addcode('object_method', fp)
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| 110 | new_ml = new_ml + (
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| 111 | '{"%s",\t(PyCFunction)%s_%s,\tMETH_VARARGS,\t%s_%s__doc__},\n'
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| 112 | %(fn, self.abbrev, fn, self.abbrev, fn))
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| 113 | self.methodlist = new_ml
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| 114 | self.addcode('object_mlist', fp)
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| 115 |
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| 116 | # Add getattr if we have methods
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| 117 | if self.methodlist and not 'tp_getattr' in self.funclist:
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| 118 | self.funclist.insert(0, 'tp_getattr')
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| 119 |
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| 120 | for fn in FUNCLIST:
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| 121 | setattr(self, fn, '0')
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| 122 |
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| 123 | #
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| 124 | # Special case for structure-access objects: put getattr in the
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| 125 | # list of functions but don't generate code for it directly,
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| 126 | # the code is obtained from the object_structure template.
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| 127 | # The same goes for setattr.
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| 128 | #
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| 129 | if 'structure' in self.typelist:
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| 130 | if 'tp_getattr' in self.funclist:
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| 131 | self.funclist.remove('tp_getattr')
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| 132 | if 'tp_setattr' in self.funclist:
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| 133 | self.funclist.remove('tp_setattr')
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| 134 | self.tp_getattr = self.abbrev + '_getattr'
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| 135 | self.tp_setattr = self.abbrev + '_setattr'
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| 136 | for fn in self.funclist:
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| 137 | self.addcode('object_'+fn, fp)
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| 138 | setattr(self, fn, '%s_%s'%(self.abbrev, fn[3:]))
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| 139 | for tn in TYPELIST:
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| 140 | setattr(self, tn, '0')
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| 141 | for tn in self.typelist:
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| 142 | self.addcode('object_'+tn, fp)
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| 143 | setattr(self, tn, '&%s_%s'%(self.abbrev, tn[3:]))
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| 144 | self.addcode('object_tail', fp)
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| 145 |
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| 146 | def write(fp, obj):
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| 147 | obj.writecode(fp)
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| 148 |
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| 149 | if __name__ == '__main__':
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| 150 | o = object()
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| 151 | o.name = 'dwarve object'
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| 152 | o.abbrev = 'dw'
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| 153 | o.funclist = ['new', 'tp_dealloc']
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| 154 | o.methodlist = ['dig']
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| 155 | m = module()
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| 156 | m.name = 'beings'
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| 157 | m.abbrev = 'be'
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| 158 | m.methodlist = ['newdwarve']
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| 159 | m.objects = [o]
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| 160 | write(sys.stdout, m)
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