Add filter_spec Python script for filtering OpenGL specification files.

auto/bin/filter_spec.py

@@ -0,0 +1,32 @@
+#!/usr/bin/python
+
+import re
+
+section = re.compile('^(Name|Name Strings?|Number|Dependencies|New Procedures and Functions|New Tokens|Additions to .*|Changes to .*|Modifications to .*|Add new Section .*)\s*$')
+token   = re.compile('^\s+(([A-Z0-9][A-Z0-9_x]*):?\s+((?:0x)?[0-9A-F]+)([^\?]*))?\s*$')
+
+if __name__ == '__main__':
+
+  from optparse import OptionParser
+  import os
+
+  parser = OptionParser('usage: %prog [options] [SOURCES...]')
+  (options, args) = parser.parse_args()
+
+  for i in args:
+      lines = open(i).readlines()
+      f = open(i,'w')
+      current = ''
+      for j in lines:
+          m = section.match(j)
+          if m:
+              current = m.group(1).strip()
+              if current in [ 'Name', 'Name String', 'Name Strings', 'Number', 'Dependencies', 'New Procedures and Functions', 'New Tokens']:
+                  print >>f, j,
+              continue
+          if current=='New Tokens':
+              if token.match(j):
+                  print >>f, j,
+          elif current in [ 'Name', 'Name String', 'Name Strings', 'Number', 'Dependencies', 'New Procedures and Functions']:
+                  print >>f, j,
+