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-rw-r--r--src/libs/3rdparty/7zip/unix/C/XzCrc64.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/src/libs/3rdparty/7zip/unix/C/XzCrc64.c b/src/libs/3rdparty/7zip/unix/C/XzCrc64.c
new file mode 100644
index 000000000..2c04c0af4
--- /dev/null
+++ b/src/libs/3rdparty/7zip/unix/C/XzCrc64.c
@@ -0,0 +1,90 @@
+/* XzCrc64.c -- CRC64 calculation
+2011-06-28 : Igor Pavlov : Public domain */
+
+#include "Precomp.h"
+
+#include "XzCrc64.h"
+#include "CpuArch.h"
+
+#define kCrc64Poly UINT64_CONST(0xC96C5795D7870F42)
+
+#ifdef MY_CPU_LE
+ #define CRC_NUM_TABLES 4
+#else
+ #define CRC_NUM_TABLES 5
+ #define CRC_UINT64_SWAP(v) \
+ ((v >> 56) | \
+ ((v >> 40) & ((UInt64)0xFF << 8)) | \
+ ((v >> 24) & ((UInt64)0xFF << 16)) | \
+ ((v >> 8) & ((UInt64)0xFF << 24)) | \
+ ((v << 8) & ((UInt64)0xFF << 32)) | \
+ ((v << 24) & ((UInt64)0xFF << 40)) | \
+ ((v << 40) & ((UInt64)0xFF << 48)) | \
+ (v << 56))
+ UInt64 MY_FAST_CALL XzCrc64UpdateT1_BeT4(UInt64 v, const void *data, size_t size, const UInt64 *table);
+#endif
+
+#ifndef MY_CPU_BE
+ UInt64 MY_FAST_CALL XzCrc64UpdateT4(UInt64 v, const void *data, size_t size, const UInt64 *table);
+#endif
+
+typedef UInt64 (MY_FAST_CALL *CRC_FUNC)(UInt64 v, const void *data, size_t size, const UInt64 *table);
+
+static CRC_FUNC g_Crc64Update;
+UInt64 g_Crc64Table[256 * CRC_NUM_TABLES];
+
+UInt64 MY_FAST_CALL Crc64Update(UInt64 v, const void *data, size_t size)
+{
+ return g_Crc64Update(v, data, size, g_Crc64Table);
+}
+
+UInt64 MY_FAST_CALL Crc64Calc(const void *data, size_t size)
+{
+ return g_Crc64Update(CRC64_INIT_VAL, data, size, g_Crc64Table) ^ CRC64_INIT_VAL;
+}
+
+void MY_FAST_CALL Crc64GenerateTable()
+{
+ UInt32 i;
+ for (i = 0; i < 256; i++)
+ {
+ UInt64 r = i;
+ unsigned j;
+ for (j = 0; j < 8; j++)
+ r = (r >> 1) ^ (kCrc64Poly & ~((r & 1) - 1));
+ g_Crc64Table[i] = r;
+ }
+ for (; i < 256 * CRC_NUM_TABLES; i++)
+ {
+ UInt64 r = g_Crc64Table[i - 256];
+ g_Crc64Table[i] = g_Crc64Table[r & 0xFF] ^ (r >> 8);
+ }
+
+ #ifdef MY_CPU_LE
+
+ g_Crc64Update = XzCrc64UpdateT4;
+
+
+
+
+
+
+ #else
+ {
+ #ifndef MY_CPU_BE
+ UInt32 k = 1;
+ if (*(const Byte *)&k == 1)
+ g_Crc64Update = XzCrc64UpdateT4;
+ else
+ #endif
+ {
+ for (i = 256 * CRC_NUM_TABLES - 1; i >= 256; i--)
+ {
+ UInt64 x = g_Crc64Table[i - 256];
+ g_Crc64Table[i] = CRC_UINT64_SWAP(x);
+ }
+ g_Crc64Update = XzCrc64UpdateT1_BeT4;
+ }
+ }
+ #endif
+}