Revert of Updating OTS repo from https://github.com/khaledhosny/ots.git

third_party/ots/tools/ttf-checksum.py

-import struct
-import sys
-
-def readU32(contents, offset):
-  wordBytes = contents[offset:offset + 4]
-  return struct.unpack('>I', wordBytes)[0]
-
-def readU16(contents, offset):
-  wordBytes = contents[offset:offset + 2]
-  return struct.unpack('>H', wordBytes)[0]
-
-def checkChecksum(infile):
-  contents = infile.read()
-  if len(contents) % 4:
-    print 'File length is not a multiple of 4'
-
-  sum = 0
-  for offset in range(0, len(contents), 4):
-    sum += readU32(contents, offset)
-    while sum >= 2**32:
-      sum -= 2**32
-  print 'Sum of whole file: %x' % sum
-
-  numTables = readU16(contents, 4)
-
-  for offset in range(12, 12 + numTables * 16, 16):
-    tag = contents[offset:offset + 4]
-    chksum = readU32(contents, offset + 4)
-    toffset = readU32(contents, offset + 8)
-    tlength = readU32(contents, offset + 12)
-
-    sum = 0
-    for offset2 in range(toffset, toffset + tlength, 4):
-      sum += readU32(contents, offset2)
-      while sum >= 2**32:
-        sum -= 2**32
-    if sum != chksum:
-      print 'Bad chksum: %s' % tag
-
-if __name__ == '__main__':
-  if len(sys.argv) != 2:
-    print 'Usage: %s <ttf filename>' % sys.argv[0]
-  else:
-    checkChecksum(file(sys.argv[1], 'r'))