a

2026-07-03 16:05:30 +08:00
commit df489d5640
1101 changed files with 779140 additions and 0 deletions
@@ -0,0 +1,54 @@
+// Crc16.cpp: implementation of the Crc16 class.
+//
+//////////////////////////////////////////////////////////////////////
+
+#include "stdafx.h"
+#include "Crc16.h"
+
+#ifdef _DEBUG
+#undef THIS_FILE
+static char THIS_FILE[]=__FILE__;
+#define new DEBUG_NEW
+#endif
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+// Crc16::Crc16()
+// {
+// 
+// }
+// 
+// Crc16::~Crc16()
+// {
+// 
+// }
+
+unsigned short Crc16::table[ 256 ];
+int Crc16::initialized = 0;
+
+Crc16::Crc16( unsigned short init_value )
+{
+    if ( !initialized ) {
+        int i;
+        int j;
+        int k;
+        int crc;
+		
+        for ( i = 0 ; i < 256 ; i++ ) {
+            k = i << 8;
+            crc = 0;
+            for ( j = 0 ; j < 8 ; j++ ) {
+                if ( ( crc ^ k ) & 0x8000 )
+                    crc = ( crc << 1 ) ^ 0x1021;
+                else
+                    crc <<= 1;
+                k <<= 1;
+            }
+            table[ i ] = (unsigned short) crc;
+        }
+        initialized = 1;
+    }
+    crc = init_value;
+}