/usr/include/bglibs/gcrc.h is in libbg-dev 2.04+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | #ifndef GENERIC_CRC__H__
#define GENERIC_CRC__H__
#include "sysdeps.h"
uint16 gcrc16fwd(uint16, const char*, long len, const uint16[256]);
uint16 gcrc16rfl(uint16, const char*, long len, const uint16[256]);
uint32 gcrc32fwd(uint32, const char*, long len, const uint32[256]);
uint32 gcrc32rfl(uint32, const char*, long len, const uint32[256]);
uint64 gcrc64fwd(uint64, const char*, long len, const uint64[256]);
uint64 gcrc64rfl(uint64, const char*, long len, const uint64[256]);
#endif
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