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# Copyright (c) 2012 Google Inc. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# This is a simple utility for dumping out the header of a compressed file, and
# is suitable for doing spot checks of compressed. files. However, this only
# implements the "long" form of the table directory.
import struct
import sys
def dump_woff2_header(header):
header_values = struct.unpack('>IIIHHIHHIIIII', header[:44])
for i, key in enumerate([
'signature',
'flavor',
'length',
'numTables',
'reserved',
'totalSfntSize',
'majorVersion',
'minorVersion',
'metaOffset',
'metaOrigLength',
'privOffset',
'privLength']):
print key, header_values[i]
numTables = header_values[3]
for i in range(numTables):
entry = struct.unpack('>IIIII', header[44+20*i:44+20*(i+1)])
print '%08x %d %d %d %d' % entry
def main():
header = file(sys.argv[1]).read()
dump_woff2_header(header)
main()
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