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read-cache: read data in a hash-independent way
Index entries are structured with a variety of fields up front, followed by a hash and one or two flags fields. Because the hash field is stored in the middle of the structure, it's difficult to use one fixed-size structure that easily allows access to the hash and flags fields. Adjust the structure to hold the maximum amount of data that may be needed using a member called "data" and read and write this field independently in the various places that need to read and write the structure. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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