Diff: crc.h

Revision:

19:79e69017c855

Parent:

3:07e15677a75c

Child:

20:949d13045431

--- a/crc.h	Sat May 14 11:19:13 2016 +0000
+++ b/crc.h	Sat Jun 04 11:29:13 2016 +0000
@@ -7,73 +7,83 @@
 #define POLYNOMIAL16 0x1021
 #define POLYNOMIAL8 0xEA
 
-namespace CRC{
+namespace CRC
+{
     typedef uint16_t crctype16; 
-    crctype16 crc16_gen(const unsigned char message[], unsigned int nBytes){
-        crctype16 remainder = 0xffff;
-        int byte;
-        char bit;
+    crctype16 crc16_gen(const unsigned char message[], unsigned int nBytes)
+        {
+            crctype16 remainder = 0xffff;
+            int byte;
+            char bit;
         
-        for( byte = 0 ; byte < nBytes ; byte++ ){
-            /*
-            Bring the data byte by byte
-            each time only one byte is brought
-            0 xor x = x
-            */
-            remainder = remainder ^ ( message[byte] << 8 );
+            for( byte = 0 ; byte < nBytes ; byte++ )
+                {
+                    /*
+                    Bring the data byte by byte
+                    each time only one byte is brought
+                    0 xor x = x
+                    */
+                    remainder = remainder ^ ( message[byte] << 8 );
             
-            for( bit = 8 ; bit > 0 ; bit--){
-                /*
-                for each bit, xor the remainder with polynomial
-                if the MSB is 1
-                */
-                if(remainder & TOPBIT16){
-                    remainder = (remainder << 1) ^ POLYNOMIAL16;
-                    /*
-                    each time the remainder is xor-ed with polynomial, the MSB is made zero
-                    hence the first digit of the remainder is ignored in the loop
-                    */
+                    for( bit = 8 ; bit > 0 ; bit--)
+                        {
+                            /*
+                            for each bit, xor the remainder with polynomial
+                            if the MSB is 1
+                            */
+                            if(remainder & TOPBIT16)
+                                {
+                                    remainder = (remainder << 1) ^ POLYNOMIAL16;
+                                    /*
+                                    each time the remainder is xor-ed with polynomial, the MSB is made zero
+                                    hence the first digit of the remainder is ignored in the loop
+                                    */
+                                }
+                            else
+                                {
+                                    remainder = (remainder << 1);
+                                }
+                        }           
                 }
-                else{
-                    remainder = (remainder << 1);
-                }
-            }
+        
+            return remainder;
         }
-        
-        return remainder;
-    }
     
     typedef uint8_t crctype8;
-    crctype8 crc8_gen(const unsigned char message[], unsigned int nBytes){
-        
-        crctype8 remainder = 0xff;
+    crctype8 crc8_gen(const unsigned char message[], unsigned int nBytes)
+        {
+            crctype8 remainder = 0xff;
         
-        for(int byte = 0 ; byte < nBytes ; byte++ ){
-            /*
-            Bring the data byte by byte
-            each time only one byte is brought
-            0 xor x = x
-            */
-            remainder = remainder ^ ( message[byte] );
+            for(int byte = 0 ; byte < nBytes ; byte++ )
+                {
+                    /*
+                    Bring the data byte by byte
+                    each time only one byte is brought
+                    0 xor x = x
+                    */
+                    remainder = remainder ^ ( message[byte] );
             
-            for(int bit = 8 ; bit > 0 ; bit--){
-                /*
-                for each bit, xor the remainder with polynomial
-                if the MSB is 1
-                */
-                if(remainder & TOPBIT8){
-                    remainder = (remainder << 1) ^ POLYNOMIAL8;
-                    /*
-                    each time the remainder is xor-ed with polynomial, the MSB is made zero
-                    hence the first digit of the remainder is ignored in the loop
-                    */
+                    for(int bit = 8 ; bit > 0 ; bit--)
+                        {
+                            /*
+                            for each bit, xor the remainder with polynomial
+                            if the MSB is 1
+                            */
+                            if(remainder & TOPBIT8)
+                                {
+                                    remainder = (remainder << 1) ^ POLYNOMIAL8;
+                                    /*
+                                    each time the remainder is xor-ed with polynomial, the MSB is made zero
+                                    hence the first digit of the remainder is ignored in the loop
+                                    */
+                                }
+                            else
+                                {
+                                    remainder = (remainder << 1);
+                                }
+                        }
                 }
-                else{
-                    remainder = (remainder << 1);
-                }
-            }
+        
+            return remainder;
         }
-        
-        return remainder;
-    }
 }
\ No newline at end of file