2.2.3.8 WSS Compressed Structures
The WSS Compressed structure uses the ZLIB Compressed Data Format Specification version 3.3 to compress a binary or string value to a binary format when save it in to the database.
The header of the WSS Compressed structure is specified as follows.
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1 |
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2 |
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3 |
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ID |
Version |
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FileHeaderSize |
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OrigSize |
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Compressed Binary string (variable) |
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... |
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ID (2 bytes): MUST be 0xA8A9.
Version (2 bytes): MUST be 0x3031 (ASCII "01")
FileHeaderSize (4 bytes): A 4-byte, unsigned integer specifying the size of the header. The value is 0x0C000000.
OrigSize (4 bytes): A 4-byte, unsigned integer specifying the size of the original content. It MUST be the size of the uncompressed stream before compression.
Compressed Binary string (variable): The compressed string using zlib compression.