a

2026-07-03 16:05:30 +08:00
commit df489d5640
1101 changed files with 779140 additions and 0 deletions
@@ -0,0 +1,51 @@
+// Crc32.cpp: implementation of the Crc32 class.
+//
+//////////////////////////////////////////////////////////////////////
+
+#include "stdafx.h"
+#include "Crc32.h"
+
+#ifdef _DEBUG
+#undef THIS_FILE
+static char THIS_FILE[]=__FILE__;
+#define new DEBUG_NEW
+#endif
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+// Crc32::Crc32()
+// {
+// 
+// }
+// 
+// Crc32::~Crc32()
+// {
+// 
+// }
+
+unsigned long Crc32::table[ 256 ];
+int Crc32::initialized = 0;
+
+Crc32::Crc32( unsigned long init_value )
+{
+    if ( !initialized ) {
+        int i;
+        int j;
+        unsigned long coeff;
+		
+        for ( i = 0; i < 256 ; i++ ) {
+            coeff = i;
+            for ( j = 0; j < 8; j++ ) {
+                if ( coeff & 1 )
+                    coeff = ( coeff >> 1 ) ^ 0xEDB88320L;
+                else
+                    coeff >>= 1;
+            }
+            table[ i ] = coeff;
+        }
+        initialized = 1;
+    }
+    crc = init_value;
+}