Replace RE2 import with a dependency

third_party/re2/re2/make_unicode_groups.py

-#!/usr/bin/python
-# Copyright 2008 The RE2 Authors.  All Rights Reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-"""Generate C++ tables for Unicode Script and Category groups."""
-
-import sys
-import unicode
-
-_header = """
-// GENERATED BY make_unicode_groups.py; DO NOT EDIT.
-// make_unicode_groups.py >unicode_groups.cc
-
-#include "re2/unicode_groups.h"
-
-namespace re2 {
-
-"""
-
-_trailer = """
-
-}  // namespace re2
-
-"""
-
-n16 = 0
-n32 = 0
-
-def MakeRanges(codes):
-  """Turn a list like [1,2,3,7,8,9] into a range list [[1,3], [7,9]]"""
-  ranges = []
-  last = -100
-  for c in codes:
-    if c == last+1:
-      ranges[-1][1] = c
-    else:
-      ranges.append([c, c])
-    last = c
-  return ranges
-
-def PrintRanges(type, name, ranges):
-  """Print the ranges as an array of type named name."""
-  print "static const %s %s[] = {" % (type, name,)
-  for lo, hi in ranges:
-    print "\t{ %d, %d }," % (lo, hi)
-  print "};"
-
-# def PrintCodes(type, name, codes):
-#   """Print the codes as an array of type named name."""
-#   print "static %s %s[] = {" % (type, name,)
-#   for c in codes:
-#     print "\t%d," % (c,)
-#   print "};"
-
-def PrintGroup(name, codes):
-  """Print the data structures for the group of codes.
-  Return a UGroup literal for the group."""
-
-  # See unicode_groups.h for a description of the data structure.
-
-  # Split codes into 16-bit ranges and 32-bit ranges.
-  range16 = MakeRanges([c for c in codes if c < 65536])
-  range32 = MakeRanges([c for c in codes if c >= 65536])
-
-  # Pull singleton ranges out of range16.
-  # code16 = [lo for lo, hi in range16 if lo == hi]
-  # range16 = [[lo, hi] for lo, hi in range16 if lo != hi]
-
-  global n16
-  global n32
-  n16 += len(range16)
-  n32 += len(range32)
-
-  ugroup = "{ \"%s\", +1" % (name,)
-  # if len(code16) > 0:
-  #   PrintCodes("uint16", name+"_code16", code16)
-  #   ugroup += ", %s_code16, %d" % (name, len(code16))
-  # else:
-  #   ugroup += ", 0, 0"
-  if len(range16) > 0:
-    PrintRanges("URange16", name+"_range16", range16)
-    ugroup += ", %s_range16, %d" % (name, len(range16))
-  else:
-    ugroup += ", 0, 0"
-  if len(range32) > 0:
-    PrintRanges("URange32", name+"_range32", range32)
-    ugroup += ", %s_range32, %d" % (name, len(range32))
-  else:
-    ugroup += ", 0, 0"
-  ugroup += " }"
-  return ugroup
-
-def main():
-  print _header
-  ugroups = []
-  for name, codes in unicode.Categories().iteritems():
-    ugroups.append(PrintGroup(name, codes))
-  for name, codes in unicode.Scripts().iteritems():
-    ugroups.append(PrintGroup(name, codes))
-  print "// %d 16-bit ranges, %d 32-bit ranges" % (n16, n32)
-  print "const UGroup unicode_groups[] = {";
-  ugroups.sort()
-  for ug in ugroups:
-    print "\t%s," % (ug,)
-  print "};"
-  print "const int num_unicode_groups = %d;" % (len(ugroups),)
-  print _trailer
-
-if __name__ == '__main__':
-  main()