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src/common/crc.h

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+/***
+*
+*	Copyright (c) 1999, 2000, Valve LLC. All rights reserved.
+*	
+*	This product contains software technology licensed from Id 
+*	Software, Inc. ("Id Technology").  Id Technology (c) 1996 Id Software, Inc. 
+*	All Rights Reserved.
+*
+*   Use, distribution, and modification of this source code and/or resulting
+*   object code is restricted to non-commercial enhancements to products from
+*   Valve LLC.  All other use, distribution, or modification is prohibited
+*   without written permission from Valve LLC.
+*
+****/
+/* crc.h */
+#ifndef CRC_H
+#define CRC_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+// MD5 Hash
+typedef struct
+{
+	unsigned int buf[4];
+    unsigned int bits[2];
+    unsigned char in[64];
+} MD5Context_t;
+
+
+typedef unsigned long CRC32_t;
+void CRC32_Init(CRC32_t *pulCRC);
+CRC32_t CRC32_Final(CRC32_t pulCRC);
+void CRC32_ProcessBuffer(CRC32_t *pulCRC, void *p, int len);
+void CRC32_ProcessByte(CRC32_t *pulCRC, unsigned char ch);
+int CRC_File(CRC32_t *crcvalue, char *pszFileName);
+
+unsigned char COM_BlockSequenceCRCByte (unsigned char *base, int length, int sequence);
+
+void MD5Init(MD5Context_t *context);
+void MD5Update(MD5Context_t *context, unsigned char const *buf,
+               unsigned int len);
+void MD5Final(unsigned char digest[16], MD5Context_t *context);
+void Transform(unsigned int buf[4], unsigned int const in[16]);
+
+int MD5_Hash_File(unsigned char digest[16], char *pszFileName, int bUsefopen, int bSeed, unsigned int seed[4]);
+char *MD5_Print(unsigned char hash[16]);
+int MD5_Hash_CachedFile(unsigned char digest[16], unsigned char *pCache, int nFileSize, int bSeed, unsigned int seed[4]);
+
+int CRC_MapFile(CRC32_t *crcvalue, char *pszFileName);
+
+#endif