diff options
Diffstat (limited to 'util/cbfstool/tools/lzma/C/Common/CRC.cpp')
-rw-r--r-- | util/cbfstool/tools/lzma/C/Common/CRC.cpp | 122 |
1 files changed, 61 insertions, 61 deletions
diff --git a/util/cbfstool/tools/lzma/C/Common/CRC.cpp b/util/cbfstool/tools/lzma/C/Common/CRC.cpp index 92bc009c2f..35e1a18751 100644 --- a/util/cbfstool/tools/lzma/C/Common/CRC.cpp +++ b/util/cbfstool/tools/lzma/C/Common/CRC.cpp @@ -1,61 +1,61 @@ -// Common/CRC.cpp
-
-#include "StdAfx.h"
-
-#include "CRC.h"
-
-static const UInt32 kCRCPoly = 0xEDB88320;
-
-UInt32 CCRC::Table[256];
-
-void CCRC::InitTable()
-{
- for (UInt32 i = 0; i < 256; i++)
- {
- UInt32 r = i;
- for (int j = 0; j < 8; j++)
- if (r & 1)
- r = (r >> 1) ^ kCRCPoly;
- else
- r >>= 1;
- CCRC::Table[i] = r;
- }
-}
-
-class CCRCTableInit
-{
-public:
- CCRCTableInit() { CCRC::InitTable(); }
-} g_CRCTableInit;
-
-void CCRC::UpdateByte(Byte b)
-{
- _value = Table[((Byte)(_value)) ^ b] ^ (_value >> 8);
-}
-
-void CCRC::UpdateUInt16(UInt16 v)
-{
- UpdateByte(Byte(v));
- UpdateByte(Byte(v >> 8));
-}
-
-void CCRC::UpdateUInt32(UInt32 v)
-{
- for (int i = 0; i < 4; i++)
- UpdateByte((Byte)(v >> (8 * i)));
-}
-
-void CCRC::UpdateUInt64(UInt64 v)
-{
- for (int i = 0; i < 8; i++)
- UpdateByte((Byte)(v >> (8 * i)));
-}
-
-void CCRC::Update(const void *data, size_t size)
-{
- UInt32 v = _value;
- const Byte *p = (const Byte *)data;
- for (; size > 0 ; size--, p++)
- v = Table[((Byte)(v)) ^ *p] ^ (v >> 8);
- _value = v;
-}
+// Common/CRC.cpp + +#include "StdAfx.h" + +#include "CRC.h" + +static const UInt32 kCRCPoly = 0xEDB88320; + +UInt32 CCRC::Table[256]; + +void CCRC::InitTable() +{ + for (UInt32 i = 0; i < 256; i++) + { + UInt32 r = i; + for (int j = 0; j < 8; j++) + if (r & 1) + r = (r >> 1) ^ kCRCPoly; + else + r >>= 1; + CCRC::Table[i] = r; + } +} + +class CCRCTableInit +{ +public: + CCRCTableInit() { CCRC::InitTable(); } +} g_CRCTableInit; + +void CCRC::UpdateByte(Byte b) +{ + _value = Table[((Byte)(_value)) ^ b] ^ (_value >> 8); +} + +void CCRC::UpdateUInt16(UInt16 v) +{ + UpdateByte(Byte(v)); + UpdateByte(Byte(v >> 8)); +} + +void CCRC::UpdateUInt32(UInt32 v) +{ + for (int i = 0; i < 4; i++) + UpdateByte((Byte)(v >> (8 * i))); +} + +void CCRC::UpdateUInt64(UInt64 v) +{ + for (int i = 0; i < 8; i++) + UpdateByte((Byte)(v >> (8 * i))); +} + +void CCRC::Update(const void *data, size_t size) +{ + UInt32 v = _value; + const Byte *p = (const Byte *)data; + for (; size > 0 ; size--, p++) + v = Table[((Byte)(v)) ^ *p] ^ (v >> 8); + _value = v; +} |