Diff: crc2.h

Revision:

3:aaa92c61931a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crc2.h	Mon Jul 13 13:14:34 2015 +0000
@@ -0,0 +1,78 @@
+/**********************************************************************
+ *
+ * Filename:    crc.h
+ * 
+ * Description: A header file describing the various CRC standards.
+ *
+ * Notes:       
+ *
+ * 
+ * Copyright (c) 2000 by Michael Barr.  This software is placed into
+ * the public domain and may be used for any purpose.  However, this
+ * notice must not be changed or removed and no warranty is either
+ * expressed or implied by its publication or distribution.
+ **********************************************************************/
+
+#ifndef _crc2_h
+#define _crc2_h
+
+
+#define FALSE   0
+#define TRUE    !FALSE
+
+/*
+ * Select the CRC standard from the list that follows.
+ */
+#define CRC_CCITT
+
+
+#if defined(CRC_CCITT)
+
+typedef unsigned short  crc;
+
+#define CRC_NAME            "CRC-CCITT"
+#define POLYNOMIAL          0x1021
+#define INITIAL_REMAINDER   0xFFFF
+#define FINAL_XOR_VALUE     0x0000
+#define REFLECT_DATA        FALSE
+#define REFLECT_REMAINDER   FALSE
+#define CHECK_VALUE         0x29B1
+
+#elif defined(CRC16)
+
+typedef unsigned short  crc;
+
+#define CRC_NAME            "CRC-16"
+#define POLYNOMIAL          0x8005
+#define INITIAL_REMAINDER   0x0000
+#define FINAL_XOR_VALUE     0x0000
+#define REFLECT_DATA        TRUE
+#define REFLECT_REMAINDER   TRUE
+#define CHECK_VALUE         0xBB3D
+
+#elif defined(CRC32)
+
+typedef unsigned long  crc;
+
+#define CRC_NAME            "CRC-32"
+#define POLYNOMIAL          0x04C11DB7
+#define INITIAL_REMAINDER   0xFFFFFFFF
+#define FINAL_XOR_VALUE     0xFFFFFFFF
+#define REFLECT_DATA        TRUE
+#define REFLECT_REMAINDER   TRUE
+#define CHECK_VALUE         0xCBF43926
+
+#else
+
+#error "One of CRC_CCITT, CRC16, or CRC32 must be #define'd."
+
+#endif
+
+
+void  crcInit();
+crc   crcSlow(unsigned char const message[], int nBytes);
+crc   crcFast(unsigned char const message[], int nBytes);
+
+
+#endif /* _crc_h */
+