git.demorecorder.com Git - free-sw/xcb/proto/blob - src/size.py

   1 #!/usr/bin/python
   2
   3 from xml.sax.saxutils import XMLFilterBase, XMLGenerator
   4 from xml.sax.xmlreader import AttributesImpl
   5 from xml.sax import make_parser
   6 import sys
   7
   8 def AttributesUnion(base, **values):
   9         baseitems = dict(base)
  10         baseitems.update(values)
  11         return AttributesImpl(baseitems)
  12
  13 class AnnotateSize(XMLFilterBase):
  14         types = {
  15                 'BYTE': 1, 'BOOL': 1,
  16                 'CARD8': 1, 'CARD16': 2, 'CARD32': 4,
  17                 'INT8': 1, 'INT16': 2, 'INT32': 4,
  18                 'char': 1, 'void': 1,
  19                 'float': 4, 'double': 8,
  20                 'XID': 4,
  21         }
  22         header = []
  23         def setTypeSize(self, name, size):
  24                 assert not self.types.has_key(name), "size of " + name + " declared as both " + str(size) + " and " + str(self.types[name])
  25                 self.types[name] = size
  26
  27         struct = None
  28         union = None
  29         def startElement(self, name, attrs):
  30                 if name == 'xcb':
  31                         self.header.insert(0, attrs['header'])
  32                 elif name == 'field':
  33                         size = self.types.get(attrs['type'], 0)
  34                         if self.struct is not None:
  35                                 self.totalsize += size
  36                         elif self.union is not None:
  37                                 self.totalsize = max(self.totalsize, size)
  38                         attrs = AttributesUnion(attrs, bytes=str(size))
  39                 elif name == 'pad':
  40                         assert self.union is None
  41                         if self.struct is not None:
  42                                 self.totalsize += int(attrs['bytes'])
  43                 elif name == 'xidtype':
  44                         self.setTypeSize(attrs['name'], 4)
  45                 elif name == 'typedef':
  46                         self.setTypeSize(attrs['newname'], self.types[attrs['oldname']])
  47                 elif name == 'struct' or name == 'union':
  48                         assert self.struct is None and self.union is None
  49                         setattr(self, name, attrs['name'])
  50                         self.totalsize = 0
  51
  52                 if len(self.header) == 1 or name == 'xcb':
  53                         XMLFilterBase.startElement(self, name, attrs)
  54
  55         def characters(self, content):
  56                 if len(self.header) == 1:
  57                         XMLFilterBase.characters(self, content)
  58
  59         def endElement(self, name):
  60                 if len(self.header) == 1 or name == 'xcb':
  61                         XMLFilterBase.endElement(self, name)
  62
  63                 if name == 'xcb':
  64                         self.header.pop(0)
  65                 elif name == 'struct' or name == 'union':
  66                         assert getattr(self, name) is not None
  67                         self.setTypeSize(getattr(self, name), self.totalsize)
  68                         setattr(self, name, None)
  69                         del self.totalsize
  70
  71 annotator = AnnotateSize(make_parser())
  72 annotator.setContentHandler(XMLGenerator())
  73 if len(sys.argv) > 1:
  74         annotator.parse(sys.argv[1])
  75 else:
  76         annotator.parse(sys.stdin)