Mercurial > cpython-lru_cache-weakref

annotate Tools/modulator/genmodule.py @ 5817:48b94de85bf3 legacy-trunk

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Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
parents 1ff12804ff2a
children 9e113aa3758d
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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 import string
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24
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25 error = 'genmodule.error'
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26
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27 #
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28 # Names of functions in the object-description struct.
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29 #
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30 FUNCLIST = ['new', 'tp_dealloc', 'tp_print', 'tp_getattr', 'tp_setattr',
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31 'tp_compare', 'tp_repr', 'tp_hash', 'tp_call', 'tp_str']
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32 TYPELIST = ['tp_as_number', 'tp_as_sequence', 'tp_as_mapping', 'structure']
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33
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34 #
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35 # writer is a base class for the object and module classes
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36 # it contains code common to both.
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37 #
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38 class writer:
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39 def __init__(self):
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40 self._subst = None
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41
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42 def makesubst(self):
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43 if not self._subst:
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44 if not self.__dict__.has_key('abbrev'):
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45 self.abbrev = self.name
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46 self.Abbrev = string.upper(self.abbrev[0])+self.abbrev[1:]
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47 subst = varsubst.Varsubst(self.__dict__)
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48 subst.useindent(1)
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49 self._subst = subst.subst
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50
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51 def addcode(self, name, fp):
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52 ifp = self.opentemplate(name)
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53 self.makesubst()
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54 d = ifp.read()
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55 d = self._subst(d)
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56 fp.write(d)
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57
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58 def opentemplate(self, name):
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59 for p in sys.path:
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60 fn = os.path.join(p, name)
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61 if os.path.exists(fn):
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62 return open(fn, 'r')
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63 fn = os.path.join(p, 'Templates')
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64 fn = os.path.join(fn, name)
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65 if os.path.exists(fn):
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66 return open(fn, 'r')
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67 raise error, 'Template '+name+' not found for '+self._type+' '+ \
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68 self.name
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69
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70 class module(writer):
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71 _type = 'module'
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72
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73 def writecode(self, fp):
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74 self.addcode('copyright', fp)
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75 self.addcode('module_head', fp)
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76 for o in self.objects:
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77 o.writehead(fp)
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78 for o in self.objects:
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79 o.writebody(fp)
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80 new_ml = ''
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81 for fn in self.methodlist:
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82 self.method = fn
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83 self.addcode('module_method', fp)
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84 new_ml = new_ml + (
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85 '{"%s",\t(PyCFunction)%s_%s,\tMETH_VARARGS,\t%s_%s__doc__},\n'
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86 %(fn, self.abbrev, fn, self.abbrev, fn))
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87 self.methodlist = new_ml
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88 self.addcode('module_tail', fp)
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89
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90 class object(writer):
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91 _type = 'object'
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92 def __init__(self):
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93 self.typelist = []
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94 self.methodlist = []
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95 self.funclist = ['new']
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96 writer.__init__(self)
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97
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98 def writecode(self, fp):
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99 self.addcode('copyright', fp)
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100 self.writehead(fp)
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101 self.writebody(fp)
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102
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103 def writehead(self, fp):
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104 self.addcode('object_head', fp)
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105
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106 def writebody(self, fp):
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107 new_ml = ''
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108 for fn in self.methodlist:
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109 self.method = fn
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110 self.addcode('object_method', fp)
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111 new_ml = new_ml + (
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112 '{"%s",\t(PyCFunction)%s_%s,\tMETH_VARARGS,\t%s_%s__doc__},\n'
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113 %(fn, self.abbrev, fn, self.abbrev, fn))
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114 self.methodlist = new_ml
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115 self.addcode('object_mlist', fp)
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116
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117 # Add getattr if we have methods
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118 if self.methodlist and not 'tp_getattr' in self.funclist:
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119 self.funclist.insert(0, 'tp_getattr')
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120
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121 for fn in FUNCLIST:
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122 setattr(self, fn, '0')
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123
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124 #
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125 # Special case for structure-access objects: put getattr in the
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126 # list of functions but don't generate code for it directly,
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127 # the code is obtained from the object_structure template.
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128 # The same goes for setattr.
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129 #
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130 if 'structure' in self.typelist:
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131 if 'tp_getattr' in self.funclist:
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132 self.funclist.remove('tp_getattr')
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133 if 'tp_setattr' in self.funclist:
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134 self.funclist.remove('tp_setattr')
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135 self.tp_getattr = self.abbrev + '_getattr'
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136 self.tp_setattr = self.abbrev + '_setattr'
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137 for fn in self.funclist:
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138 self.addcode('object_'+fn, fp)
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139 setattr(self, fn, '%s_%s'%(self.abbrev, fn[3:]))
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140 for tn in TYPELIST:
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141 setattr(self, tn, '0')
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142 for tn in self.typelist:
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143 self.addcode('object_'+tn, fp)
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144 setattr(self, tn, '&%s_%s'%(self.abbrev, tn[3:]))
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145 self.addcode('object_tail', fp)
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146
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147 def write(fp, obj):
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148 obj.writecode(fp)
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149
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150 if __name__ == '__main__':
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151 o = object()
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152 o.name = 'dwarve object'
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153 o.abbrev = 'dw'
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154 o.funclist = ['new', 'tp_dealloc']
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155 o.methodlist = ['dig']
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156 m = module()
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157 m.name = 'beings'
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158 m.abbrev = 'be'
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159 m.methodlist = ['newdwarve']
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160 m.objects = [o]
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161 write(sys.stdout, m)