1 files changed, 286 insertions, 0 deletions
diff --git a/src/core/crc64.cc b/src/core/crc64.cc
new file mode 100644
index 0000000..c2ca53c
--- /dev/null
+++ b/src/core/crc64.cc
@@ -0,0 +1,286 @@
+#include "core/pch.hh"
+
+#include "core/crc64.hh"
+
+// The lookup table for CRC64 checksum; this lookup
+// table is generated using ECMA-182 compilant parameters:
+// - Polynomial: `0x42F0E1EBA9EA3693`
+// - Initial value: `0x0000000000000000`
+// - Final xor: `0x0000000000000000`
+// CRC Calculator: https://www.sunshine2k.de/coding/javascript/crc/crc_js.html
+constexpr static const std::uint64_t crc_table[256] = {
+    0x0000000000000000,
+    0x42F0E1EBA9EA3693,
+    0x85E1C3D753D46D26,
+    0xC711223CFA3E5BB5,
+    0x493366450E42ECDF,
+    0x0BC387AEA7A8DA4C,
+    0xCCD2A5925D9681F9,
+    0x8E224479F47CB76A,
+    0x9266CC8A1C85D9BE,
+    0xD0962D61B56FEF2D,
+    0x17870F5D4F51B498,
+    0x5577EEB6E6BB820B,
+    0xDB55AACF12C73561,
+    0x99A54B24BB2D03F2,
+    0x5EB4691841135847,
+    0x1C4488F3E8F96ED4,
+    0x663D78FF90E185EF,
+    0x24CD9914390BB37C,
+    0xE3DCBB28C335E8C9,
+    0xA12C5AC36ADFDE5A,
+    0x2F0E1EBA9EA36930,
+    0x6DFEFF5137495FA3,
+    0xAAEFDD6DCD770416,
+    0xE81F3C86649D3285,
+    0xF45BB4758C645C51,
+    0xB6AB559E258E6AC2,
+    0x71BA77A2DFB03177,
+    0x334A9649765A07E4,
+    0xBD68D2308226B08E,
+    0xFF9833DB2BCC861D,
+    0x388911E7D1F2DDA8,
+    0x7A79F00C7818EB3B,
+    0xCC7AF1FF21C30BDE,
+    0x8E8A101488293D4D,
+    0x499B3228721766F8,
+    0x0B6BD3C3DBFD506B,
+    0x854997BA2F81E701,
+    0xC7B97651866BD192,
+    0x00A8546D7C558A27,
+    0x4258B586D5BFBCB4,
+    0x5E1C3D753D46D260,
+    0x1CECDC9E94ACE4F3,
+    0xDBFDFEA26E92BF46,
+    0x990D1F49C77889D5,
+    0x172F5B3033043EBF,
+    0x55DFBADB9AEE082C,
+    0x92CE98E760D05399,
+    0xD03E790CC93A650A,
+    0xAA478900B1228E31,
+    0xE8B768EB18C8B8A2,
+    0x2FA64AD7E2F6E317,
+    0x6D56AB3C4B1CD584,
+    0xE374EF45BF6062EE,
+    0xA1840EAE168A547D,
+    0x66952C92ECB40FC8,
+    0x2465CD79455E395B,
+    0x3821458AADA7578F,
+    0x7AD1A461044D611C,
+    0xBDC0865DFE733AA9,
+    0xFF3067B657990C3A,
+    0x711223CFA3E5BB50,
+    0x33E2C2240A0F8DC3,
+    0xF4F3E018F031D676,
+    0xB60301F359DBE0E5,
+    0xDA050215EA6C212F,
+    0x98F5E3FE438617BC,
+    0x5FE4C1C2B9B84C09,
+    0x1D14202910527A9A,
+    0x93366450E42ECDF0,
+    0xD1C685BB4DC4FB63,
+    0x16D7A787B7FAA0D6,
+    0x5427466C1E109645,
+    0x4863CE9FF6E9F891,
+    0x0A932F745F03CE02,
+    0xCD820D48A53D95B7,
+    0x8F72ECA30CD7A324,
+    0x0150A8DAF8AB144E,
+    0x43A04931514122DD,
+    0x84B16B0DAB7F7968,
+    0xC6418AE602954FFB,
+    0xBC387AEA7A8DA4C0,
+    0xFEC89B01D3679253,
+    0x39D9B93D2959C9E6,
+    0x7B2958D680B3FF75,
+    0xF50B1CAF74CF481F,
+    0xB7FBFD44DD257E8C,
+    0x70EADF78271B2539,
+    0x321A3E938EF113AA,
+    0x2E5EB66066087D7E,
+    0x6CAE578BCFE24BED,
+    0xABBF75B735DC1058,
+    0xE94F945C9C3626CB,
+    0x676DD025684A91A1,
+    0x259D31CEC1A0A732,
+    0xE28C13F23B9EFC87,
+    0xA07CF2199274CA14,
+    0x167FF3EACBAF2AF1,
+    0x548F120162451C62,
+    0x939E303D987B47D7,
+    0xD16ED1D631917144,
+    0x5F4C95AFC5EDC62E,
+    0x1DBC74446C07F0BD,
+    0xDAAD56789639AB08,
+    0x985DB7933FD39D9B,
+    0x84193F60D72AF34F,
+    0xC6E9DE8B7EC0C5DC,
+    0x01F8FCB784FE9E69,
+    0x43081D5C2D14A8FA,
+    0xCD2A5925D9681F90,
+    0x8FDAB8CE70822903,
+    0x48CB9AF28ABC72B6,
+    0x0A3B7B1923564425,
+    0x70428B155B4EAF1E,
+    0x32B26AFEF2A4998D,
+    0xF5A348C2089AC238,
+    0xB753A929A170F4AB,
+    0x3971ED50550C43C1,
+    0x7B810CBBFCE67552,
+    0xBC902E8706D82EE7,
+    0xFE60CF6CAF321874,
+    0xE224479F47CB76A0,
+    0xA0D4A674EE214033,
+    0x67C58448141F1B86,
+    0x253565A3BDF52D15,
+    0xAB1721DA49899A7F,
+    0xE9E7C031E063ACEC,
+    0x2EF6E20D1A5DF759,
+    0x6C0603E6B3B7C1CA,
+    0xF6FAE5C07D3274CD,
+    0xB40A042BD4D8425E,
+    0x731B26172EE619EB,
+    0x31EBC7FC870C2F78,
+    0xBFC9838573709812,
+    0xFD39626EDA9AAE81,
+    0x3A28405220A4F534,
+    0x78D8A1B9894EC3A7,
+    0x649C294A61B7AD73,
+    0x266CC8A1C85D9BE0,
+    0xE17DEA9D3263C055,
+    0xA38D0B769B89F6C6,
+    0x2DAF4F0F6FF541AC,
+    0x6F5FAEE4C61F773F,
+    0xA84E8CD83C212C8A,
+    0xEABE6D3395CB1A19,
+    0x90C79D3FEDD3F122,
+    0xD2377CD44439C7B1,
+    0x15265EE8BE079C04,
+    0x57D6BF0317EDAA97,
+    0xD9F4FB7AE3911DFD,
+    0x9B041A914A7B2B6E,
+    0x5C1538ADB04570DB,
+    0x1EE5D94619AF4648,
+    0x02A151B5F156289C,
+    0x4051B05E58BC1E0F,
+    0x87409262A28245BA,
+    0xC5B073890B687329,
+    0x4B9237F0FF14C443,
+    0x0962D61B56FEF2D0,
+    0xCE73F427ACC0A965,
+    0x8C8315CC052A9FF6,
+    0x3A80143F5CF17F13,
+    0x7870F5D4F51B4980,
+    0xBF61D7E80F251235,
+    0xFD913603A6CF24A6,
+    0x73B3727A52B393CC,
+    0x31439391FB59A55F,
+    0xF652B1AD0167FEEA,
+    0xB4A25046A88DC879,
+    0xA8E6D8B54074A6AD,
+    0xEA16395EE99E903E,
+    0x2D071B6213A0CB8B,
+    0x6FF7FA89BA4AFD18,
+    0xE1D5BEF04E364A72,
+    0xA3255F1BE7DC7CE1,
+    0x64347D271DE22754,
+    0x26C49CCCB40811C7,
+    0x5CBD6CC0CC10FAFC,
+    0x1E4D8D2B65FACC6F,
+    0xD95CAF179FC497DA,
+    0x9BAC4EFC362EA149,
+    0x158E0A85C2521623,
+    0x577EEB6E6BB820B0,
+    0x906FC95291867B05,
+    0xD29F28B9386C4D96,
+    0xCEDBA04AD0952342,
+    0x8C2B41A1797F15D1,
+    0x4B3A639D83414E64,
+    0x09CA82762AAB78F7,
+    0x87E8C60FDED7CF9D,
+    0xC51827E4773DF90E,
+    0x020905D88D03A2BB,
+    0x40F9E43324E99428,
+    0x2CFFE7D5975E55E2,
+    0x6E0F063E3EB46371,
+    0xA91E2402C48A38C4,
+    0xEBEEC5E96D600E57,
+    0x65CC8190991CB93D,
+    0x273C607B30F68FAE,
+    0xE02D4247CAC8D41B,
+    0xA2DDA3AC6322E288,
+    0xBE992B5F8BDB8C5C,
+    0xFC69CAB42231BACF,
+    0x3B78E888D80FE17A,
+    0x7988096371E5D7E9,
+    0xF7AA4D1A85996083,
+    0xB55AACF12C735610,
+    0x724B8ECDD64D0DA5,
+    0x30BB6F267FA73B36,
+    0x4AC29F2A07BFD00D,
+    0x08327EC1AE55E69E,
+    0xCF235CFD546BBD2B,
+    0x8DD3BD16FD818BB8,
+    0x03F1F96F09FD3CD2,
+    0x41011884A0170A41,
+    0x86103AB85A2951F4,
+    0xC4E0DB53F3C36767,
+    0xD8A453A01B3A09B3,
+    0x9A54B24BB2D03F20,
+    0x5D45907748EE6495,
+    0x1FB5719CE1045206,
+    0x919735E51578E56C,
+    0xD367D40EBC92D3FF,
+    0x1476F63246AC884A,
+    0x568617D9EF46BED9,
+    0xE085162AB69D5E3C,
+    0xA275F7C11F7768AF,
+    0x6564D5FDE549331A,
+    0x279434164CA30589,
+    0xA9B6706FB8DFB2E3,
+    0xEB46918411358470,
+    0x2C57B3B8EB0BDFC5,
+    0x6EA7525342E1E956,
+    0x72E3DAA0AA188782,
+    0x30133B4B03F2B111,
+    0xF7021977F9CCEAA4,
+    0xB5F2F89C5026DC37,
+    0x3BD0BCE5A45A6B5D,
+    0x79205D0E0DB05DCE,
+    0xBE317F32F78E067B,
+    0xFCC19ED95E6430E8,
+    0x86B86ED5267CDBD3,
+    0xC4488F3E8F96ED40,
+    0x0359AD0275A8B6F5,
+    0x41A94CE9DC428066,
+    0xCF8B0890283E370C,
+    0x8D7BE97B81D4019F,
+    0x4A6ACB477BEA5A2A,
+    0x089A2AACD2006CB9,
+    0x14DEA25F3AF9026D,
+    0x562E43B4931334FE,
+    0x913F6188692D6F4B,
+    0xD3CF8063C0C759D8,
+    0x5DEDC41A34BBEEB2,
+    0x1F1D25F19D51D821,
+    0xD80C07CD676F8394,
+    0x9AFCE626CE85B507,
+};
+
+std::uint64_t crc64::get(const void* buffer, std::size_t size, std::uint64_t combine)
+{
+    auto data = reinterpret_cast<const std::uint8_t*>(buffer);
+    for(std::size_t i = 0; i < size; ++i)
+        combine = crc_table[((combine >> 56) ^ data[i]) & 0xFF] ^ (combine << 8);
+    return combine;
+}
+
+std::uint64_t crc64::get(const std::vector<std::byte>& buffer, std::uint64_t combine)
+{
+    return crc64::get(buffer.data(), buffer.size(), combine);
+}
+
+std::uint64_t crc64::get(const std::string& buffer, std::uint64_t combine)
+{
+    return crc64::get(buffer.data(), buffer.size(), combine);
+}