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+ #pragma once
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+ #pragma warning( disable : 4455)
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+
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+ #include < string>
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+
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+ namespace CRC64
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+ {
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+ constexpr const size_t table[] = {
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+ 0x0000000000000000 , 0x7ad870c830358979 , 0xf5b0e190606b12f2 , 0x8f689158505e9b8b ,
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+ 0xc038e5739841b68f , 0xbae095bba8743ff6 , 0x358804e3f82aa47d , 0x4f50742bc81f2d04 ,
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+ 0xab28ecb46814fe75 , 0xd1f09c7c5821770c , 0x5e980d24087fec87 , 0x24407dec384a65fe ,
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+ 0x6b1009c7f05548fa , 0x11c8790fc060c183 , 0x9ea0e857903e5a08 , 0xe478989fa00bd371 ,
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+ 0x7d08ff3b88be6f81 , 0x07d08ff3b88be6f8 , 0x88b81eabe8d57d73 , 0xf2606e63d8e0f40a ,
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+ 0xbd301a4810ffd90e , 0xc7e86a8020ca5077 , 0x4880fbd87094cbfc , 0x32588b1040a14285 ,
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+ 0xd620138fe0aa91f4 , 0xacf86347d09f188d , 0x2390f21f80c18306 , 0x594882d7b0f40a7f ,
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+ 0x1618f6fc78eb277b , 0x6cc0863448deae02 , 0xe3a8176c18803589 , 0x997067a428b5bcf0 ,
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+ 0xfa11fe77117cdf02 , 0x80c98ebf2149567b , 0x0fa11fe77117cdf0 , 0x75796f2f41224489 ,
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+ 0x3a291b04893d698d , 0x40f16bccb908e0f4 , 0xcf99fa94e9567b7f , 0xb5418a5cd963f206 ,
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+ 0x513912c379682177 , 0x2be1620b495da80e , 0xa489f35319033385 , 0xde51839b2936bafc ,
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+ 0x9101f7b0e12997f8 , 0xebd98778d11c1e81 , 0x64b116208142850a , 0x1e6966e8b1770c73 ,
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+ 0x8719014c99c2b083 , 0xfdc17184a9f739fa , 0x72a9e0dcf9a9a271 , 0x08719014c99c2b08 ,
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+ 0x4721e43f0183060c , 0x3df994f731b68f75 , 0xb29105af61e814fe , 0xc849756751dd9d87 ,
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+ 0x2c31edf8f1d64ef6 , 0x56e99d30c1e3c78f , 0xd9810c6891bd5c04 , 0xa3597ca0a188d57d ,
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+ 0xec09088b6997f879 , 0x96d1784359a27100 , 0x19b9e91b09fcea8b , 0x636199d339c963f2 ,
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+ 0xdf7adabd7a6e2d6f , 0xa5a2aa754a5ba416 , 0x2aca3b2d1a053f9d , 0x50124be52a30b6e4 ,
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+ 0x1f423fcee22f9be0 , 0x659a4f06d21a1299 , 0xeaf2de5e82448912 , 0x902aae96b271006b ,
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+ 0x74523609127ad31a , 0x0e8a46c1224f5a63 , 0x81e2d7997211c1e8 , 0xfb3aa75142244891 ,
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+ 0xb46ad37a8a3b6595 , 0xceb2a3b2ba0eecec , 0x41da32eaea507767 , 0x3b024222da65fe1e ,
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+ 0xa2722586f2d042ee , 0xd8aa554ec2e5cb97 , 0x57c2c41692bb501c , 0x2d1ab4dea28ed965 ,
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+ 0x624ac0f56a91f461 , 0x1892b03d5aa47d18 , 0x97fa21650afae693 , 0xed2251ad3acf6fea ,
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+ 0x095ac9329ac4bc9b , 0x7382b9faaaf135e2 , 0xfcea28a2faafae69 , 0x8632586aca9a2710 ,
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+ 0xc9622c4102850a14 , 0xb3ba5c8932b0836d , 0x3cd2cdd162ee18e6 , 0x460abd1952db919f ,
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+ 0x256b24ca6b12f26d , 0x5fb354025b277b14 , 0xd0dbc55a0b79e09f , 0xaa03b5923b4c69e6 ,
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+ 0xe553c1b9f35344e2 , 0x9f8bb171c366cd9b , 0x10e3202993385610 , 0x6a3b50e1a30ddf69 ,
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+ 0x8e43c87e03060c18 , 0xf49bb8b633338561 , 0x7bf329ee636d1eea , 0x012b592653589793 ,
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+ 0x4e7b2d0d9b47ba97 , 0x34a35dc5ab7233ee , 0xbbcbcc9dfb2ca865 , 0xc113bc55cb19211c ,
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+ 0x5863dbf1e3ac9dec , 0x22bbab39d3991495 , 0xadd33a6183c78f1e , 0xd70b4aa9b3f20667 ,
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+ 0x985b3e827bed2b63 , 0xe2834e4a4bd8a21a , 0x6debdf121b863991 , 0x1733afda2bb3b0e8 ,
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+ 0xf34b37458bb86399 , 0x8993478dbb8deae0 , 0x06fbd6d5ebd3716b , 0x7c23a61ddbe6f812 ,
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+ 0x3373d23613f9d516 , 0x49aba2fe23cc5c6f , 0xc6c333a67392c7e4 , 0xbc1b436e43a74e9d ,
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+ 0x95ac9329ac4bc9b5 , 0xef74e3e19c7e40cc , 0x601c72b9cc20db47 , 0x1ac40271fc15523e ,
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+ 0x5594765a340a7f3a , 0x2f4c0692043ff643 , 0xa02497ca54616dc8 , 0xdafce7026454e4b1 ,
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+ 0x3e847f9dc45f37c0 , 0x445c0f55f46abeb9 , 0xcb349e0da4342532 , 0xb1eceec59401ac4b ,
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+ 0xfebc9aee5c1e814f , 0x8464ea266c2b0836 , 0x0b0c7b7e3c7593bd , 0x71d40bb60c401ac4 ,
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+ 0xe8a46c1224f5a634 , 0x927c1cda14c02f4d , 0x1d148d82449eb4c6 , 0x67ccfd4a74ab3dbf ,
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+ 0x289c8961bcb410bb , 0x5244f9a98c8199c2 , 0xdd2c68f1dcdf0249 , 0xa7f41839ecea8b30 ,
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+ 0x438c80a64ce15841 , 0x3954f06e7cd4d138 , 0xb63c61362c8a4ab3 , 0xcce411fe1cbfc3ca ,
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+ 0x83b465d5d4a0eece , 0xf96c151de49567b7 , 0x76048445b4cbfc3c , 0x0cdcf48d84fe7545 ,
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+ 0x6fbd6d5ebd3716b7 , 0x15651d968d029fce , 0x9a0d8ccedd5c0445 , 0xe0d5fc06ed698d3c ,
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+ 0xaf85882d2576a038 , 0xd55df8e515432941 , 0x5a3569bd451db2ca , 0x20ed197575283bb3 ,
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+ 0xc49581ead523e8c2 , 0xbe4df122e51661bb , 0x3125607ab548fa30 , 0x4bfd10b2857d7349 ,
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+ 0x04ad64994d625e4d , 0x7e7514517d57d734 , 0xf11d85092d094cbf , 0x8bc5f5c11d3cc5c6 ,
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+ 0x12b5926535897936 , 0x686de2ad05bcf04f , 0xe70573f555e26bc4 , 0x9ddd033d65d7e2bd ,
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+ 0xd28d7716adc8cfb9 , 0xa85507de9dfd46c0 , 0x273d9686cda3dd4b , 0x5de5e64efd965432 ,
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+ 0xb99d7ed15d9d8743 , 0xc3450e196da80e3a , 0x4c2d9f413df695b1 , 0x36f5ef890dc31cc8 ,
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+ 0x79a59ba2c5dc31cc , 0x037deb6af5e9b8b5 , 0x8c157a32a5b7233e , 0xf6cd0afa9582aa47 ,
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+ 0x4ad64994d625e4da , 0x300e395ce6106da3 , 0xbf66a804b64ef628 , 0xc5bed8cc867b7f51 ,
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+ 0x8aeeace74e645255 , 0xf036dc2f7e51db2c , 0x7f5e4d772e0f40a7 , 0x05863dbf1e3ac9de ,
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+ 0xe1fea520be311aaf , 0x9b26d5e88e0493d6 , 0x144e44b0de5a085d , 0x6e963478ee6f8124 ,
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+ 0x21c640532670ac20 , 0x5b1e309b16452559 , 0xd476a1c3461bbed2 , 0xaeaed10b762e37ab ,
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+ 0x37deb6af5e9b8b5b , 0x4d06c6676eae0222 , 0xc26e573f3ef099a9 , 0xb8b627f70ec510d0 ,
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+ 0xf7e653dcc6da3dd4 , 0x8d3e2314f6efb4ad , 0x0256b24ca6b12f26 , 0x788ec2849684a65f ,
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+ 0x9cf65a1b368f752e , 0xe62e2ad306bafc57 , 0x6946bb8b56e467dc , 0x139ecb4366d1eea5 ,
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+ 0x5ccebf68aecec3a1 , 0x2616cfa09efb4ad8 , 0xa97e5ef8cea5d153 , 0xd3a62e30fe90582a ,
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+ 0xb0c7b7e3c7593bd8 , 0xca1fc72bf76cb2a1 , 0x45775673a732292a , 0x3faf26bb9707a053 ,
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+ 0x70ff52905f188d57 , 0x0a2722586f2d042e , 0x854fb3003f739fa5 , 0xff97c3c80f4616dc ,
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+ 0x1bef5b57af4dc5ad , 0x61372b9f9f784cd4 , 0xee5fbac7cf26d75f , 0x9487ca0fff135e26 ,
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+ 0xdbd7be24370c7322 , 0xa10fceec0739fa5b , 0x2e675fb4576761d0 , 0x54bf2f7c6752e8a9 ,
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+ 0xcdcf48d84fe75459 , 0xb71738107fd2dd20 , 0x387fa9482f8c46ab , 0x42a7d9801fb9cfd2 ,
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+ 0x0df7adabd7a6e2d6 , 0x772fdd63e7936baf , 0xf8474c3bb7cdf024 , 0x829f3cf387f8795d ,
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+ 0x66e7a46c27f3aa2c , 0x1c3fd4a417c62355 , 0x935745fc4798b8de , 0xe98f353477ad31a7 ,
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+ 0xa6df411fbfb21ca3 , 0xdc0731d78f8795da , 0x536fa08fdfd90e51 , 0x29b7d047efec8728 ,
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+ };
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+
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+ constexpr size_t hash (const char * sz, const size_t size)
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+ {
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+ size_t crc = 0xffffffffffffffff ;
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+ for (size_t i = 0 ; i < size; i++)
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+ crc = (crc >> 8 ) ^ table[(crc & sz[i]) & 0xff ];
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+
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+ return crc ^ 0xffffffffffffffff ;
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+ };
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+
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+ constexpr size_t hash (const std::string& s)
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+ {
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+ size_t crc = 0xffffffffffffffff ;
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+ for (char c : s)
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+ crc = (crc >> 8 ) ^ table[(crc & c) & 0xff ];
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+
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+ return crc ^ 0xffffffffffffffff ;
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+ };
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+ };
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+
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+ constexpr size_t operator " " Hashed(const char * sz, size_t size)
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+ {
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+ return CRC64::hash (sz, size);
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+ };
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