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2 d ) r r` r ra r_ r@ c C sh d| kodkn s$t d| t s2|dkrHddlm} || |S ddlm} || t| dS dS )a7 Compress 'data' to Zlib format. If 'USE_ZOPFLI' variable is True,
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> # big endian
TTCTag: 4s # "ttcf"
Version: L # 0x00010000 or 0x00020000
numFonts: L # number of fonts
# OffsetTable[numFonts]: L # array with offsets from beginning of file
# ulDsigTag: L # version 2.0 only
# ulDsigLength: L # version 2.0 only
# ulDsigOffset: L # version 2.0 only
z
> # big endian
sfntVersion: 4s
numTables: H # number of tables
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entrySelector: H # log2(max2 <= numTables)
rangeShift: H # numTables*16-searchRange
zc
> # big endian
tag: 4s
checkSum: L
offset: L
length: L
ab
> # big endian
signature: 4s # "wOFF"
sfntVersion: 4s
length: L # total woff file size
numTables: H # number of tables
reserved: H # set to 0
totalSfntSize: L # uncompressed size
majorVersion: H # major version of WOFF file
minorVersion: H # minor version of WOFF file
metaOffset: L # offset to metadata block
metaLength: L # length of compressed metadata
metaOrigLength: L # length of uncompressed metadata
privOffset: L # offset to private data block
privLength: L # length of private data block
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tag: 4s
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r7 c C s t | d }|r | dd| 7 } d}d}|d dks8txPtdt | |D ]<}| ||| }tjdt |d |}|t| d@ }qJW |S )aw Calculate the checksum for an arbitrary block of data.
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1633837924
>>> print(calcChecksum(b"abcdxyz"))
3655064932
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