Implement CRC64.

include/dicformat/consts.h

@@ -56,6 +56,9 @@
 /** This mask is to check for position in CompactDisc suffix/prefix deduplicated block */
 #define CD_DFIX_MASK 0x00FFFFFF
 
+#define CRC64_ECMA_POLY 0xC96C5795D7870F42
+#define CRC64_ECMA_SEED 0xFFFFFFFFFFFFFFFF
+
 #endif //LIBDICFORMAT_CONSTS_H
 
 #pragma clang diagnostic pop

include/dicformat/decls.h

@@ -46,5 +46,16 @@ int close(void *context);
 
 uint8_t *read_media_tag(void *context, int tag);
 
+void *crc64_init(uint64_t polynomial, uint64_t seed);
+
+void *crc64_init_ecma(void);
+
+void crc64_update(void *context, const char *data, size_t len);
+
+uint64_t crc64_final(void *context);
+
+uint64_t crc64_data(const char *data, size_t len, uint64_t polynomial, uint64_t seed);
+
+uint64_t crc64_data_ecma(const char *data, size_t len);
 
 #endif //LIBDICFORMAT_DECLS_H

include/dicformat/structs.h

@@ -302,6 +302,12 @@ typedef struct ChecksumEntry
     uint32_t length;
 } ChecksumEntry;
 
+typedef struct Crc64Context
+{
+    uint64_t finalSeed;
+    uint64_t table[256];
+    uint64_t hashInt;
+} Crc64Context;
 
 #pragma pack(pop)