--- a/tool/cmd_alias.cpp	Tue Jul 22 11:38:21 2008 +0000
+++ b/tool/cmd_alias.cpp	Tue Jul 22 14:17:20 2008 +0000
@@ -10,6 +10,7 @@
 using namespace std;
 
 #include "globals.h"
+#include "sii_crc.h"
 
 /*****************************************************************************/
 
@@ -82,47 +83,6 @@
 
 /*****************************************************************************/
 
-/** Calculates the SII checksum field.
- *
- * The checksum is generated with the polynom x^8+x^2+x+1 (0x07) and an
- * initial value of 0xff (see IEC 61158-6-12 ch. 5.4).
- *
- * The below code was originally generated with PYCRC
- * http://www.tty1.net/pycrc
- *
- * ./pycrc.py --width=8 --poly=0x07 --reflect-in=0 --xor-in=0xff
- *   --reflect-out=0 --xor-out=0 --generate c --algorithm=bit-by-bit
- *
- * \return CRC8
- */
-uint8_t calcSiiCrc(
-        const uint8_t *data, /**< pointer to data */
-        size_t length /**< number of bytes in \a data */
-        )
-{
-    unsigned int i;
-    uint8_t bit, byte, crc = 0x48;
-
-    while (length--) {
-        byte = *data++;
-        for (i = 0; i < 8; i++) {
-            bit = crc & 0x80;
-            crc = (crc << 1) | ((byte >> (7 - i)) & 0x01);
-            if (bit) crc ^= 0x07;
-        }
-    }
-
-    for (i = 0; i < 8; i++) {
-        bit = crc & 0x80;
-        crc <<= 1;
-        if (bit) crc ^= 0x07;
-    }
-
-    return crc;
-}
-
-/*****************************************************************************/
-
 /** Writes the Secondary slave address (alias) to the slave's SII.
  */
 void writeSlaveAlias(