1 files changed, 24 insertions, 0 deletions
diff --git a/extern/lzma/7zCrc.h b/extern/lzma/7zCrc.h
new file mode 100644
index 00000000000..00dc29cee3c
--- /dev/null
+++ b/extern/lzma/7zCrc.h
@@ -0,0 +1,24 @@
+/* 7zCrc.h -- CRC32 calculation
+2008-03-13
+Igor Pavlov
+Public domain */
+
+#ifndef __7Z_CRC_H
+#define __7Z_CRC_H
+
+#include <stddef.h>
+
+#include "Types.h"
+
+extern UInt32 g_CrcTable[];
+
+void MY_FAST_CALL CrcGenerateTable(void);
+
+#define CRC_INIT_VAL 0xFFFFFFFF
+#define CRC_GET_DIGEST(crc) ((crc) ^ 0xFFFFFFFF)
+#define CRC_UPDATE_BYTE(crc, b) (g_CrcTable[((crc) ^ (b)) & 0xFF] ^ ((crc) >> 8))
+
+UInt32 MY_FAST_CALL CrcUpdate(UInt32 crc, const void *data, size_t size);
+UInt32 MY_FAST_CALL CrcCalc(const void *data, size_t size);
+
+#endif