Remove cryptoppwin submodule (#754)

third_party/cryptoppwin/include/cryptopp/crc.h

@@ -0,0 +1,90 @@
+// crc.h - originally written and placed in the public domain by Wei Dai
+
+/// \file crc.h
+/// \brief Classes for CRC-32 and CRC-32C checksum algorithm
+
+#ifndef CRYPTOPP_CRC32_H
+#define CRYPTOPP_CRC32_H
+
+#include "cryptlib.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+const word32 CRC32_NEGL = 0xffffffffL;
+
+#if (CRYPTOPP_LITTLE_ENDIAN)
+#define CRC32_INDEX(c) (c & 0xff)
+#define CRC32_SHIFTED(c) (c >> 8)
+#else
+#define CRC32_INDEX(c) (c >> 24)
+#define CRC32_SHIFTED(c) (c << 8)
+#endif
+
+/// \brief CRC-32 Checksum Calculation
+/// \details Uses CRC polynomial 0xEDB88320
+class CRC32 : public HashTransformation
+{
+public:
+	CRYPTOPP_CONSTANT(DIGESTSIZE = 4);
+	CRC32();
+	void Update(const byte *input, size_t length);
+	void TruncatedFinal(byte *hash, size_t size);
+	unsigned int DigestSize() const {return DIGESTSIZE;}
+	CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "CRC32";}
+	std::string AlgorithmName() const {return StaticAlgorithmName();}
+
+	/// \brief Updates a CRC with additional input
+	/// \param b the additional input as a byte
+	void UpdateByte(byte b) {m_crc = m_tab[CRC32_INDEX(m_crc) ^ b] ^ CRC32_SHIFTED(m_crc);}
+
+	/// \brief Retrieves the i-th byte of the CRC
+	/// \param i the additional input as a byte
+	/// \return the byte at the i-th position
+	byte GetCrcByte(size_t i) const {return reinterpret_cast<const byte *>(&m_crc)[i];}
+
+	std::string AlgorithmProvider() const;
+
+protected:
+	void Reset() {m_crc = CRC32_NEGL;}
+
+private:
+	static const word32 m_tab[256];
+	word32 m_crc;
+};
+
+/// \brief CRC-32C Checksum Calculation
+/// \details Uses CRC polynomial 0x82F63B78
+/// \since Crypto++ 5.6.4
+class CRC32C : public HashTransformation
+{
+public:
+	CRYPTOPP_CONSTANT(DIGESTSIZE = 4);
+	CRC32C();
+	void Update(const byte *input, size_t length);
+	void TruncatedFinal(byte *hash, size_t size);
+	unsigned int DigestSize() const {return DIGESTSIZE;}
+	CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "CRC32C";}
+	std::string AlgorithmName() const {return StaticAlgorithmName();}
+
+	/// \brief Updates a CRC with additional input
+	/// \param b the additional input as a byte
+	void UpdateByte(byte b) {m_crc = m_tab[CRC32_INDEX(m_crc) ^ b] ^ CRC32_SHIFTED(m_crc);}
+
+	/// \brief Retrieves the i-th byte of the CRC
+	/// \param i the additional input as a byte
+	/// \return the byte at the i-th position
+	byte GetCrcByte(size_t i) const {return reinterpret_cast<const byte *>(&m_crc)[i];}
+
+	std::string AlgorithmProvider() const;
+
+protected:
+	void Reset() {m_crc = CRC32_NEGL;}
+
+private:
+	static const word32 m_tab[256];
+	word32 m_crc;
+};
+
+NAMESPACE_END
+
+#endif