diff --git a/sha1.c b/sha1.c
index 7112dbf..29ee2ad 100644
--- a/sha1.c
+++ b/sha1.c
@@ -11,7 +11,7 @@
 #define K3 0x8F1BBCDC
 #define K4 0xCA62C1D6
 
-#define _LROT32(x,n) (( (uint32_t)(x) << n ) | ( (uint32_t)(x) >>(32-n) )) 
+#define _LROT32(x,n) (( (uint32_t)(x) << n ) | ( (uint32_t)(x) >>(32-n) ))  
 #define _W(n) (n>=16 ? chunk_e[n-16] : chunk[n])
 
 
@@ -27,8 +27,7 @@ void sha1_addbyte(uint8_t c){
 	if(chunk_cnt==64){
 		/*chunk extension*/
 		uint32_t a,b,c,d,e,chunk_e[64];
-		for(i=0; i<64; i++){
-			//chunk_e[i]= _LROT32( _W(i+16-3) ^ _W(i+16-8) ^ _W(i+16-14) ^ _W(i+16-16), 1 );
+		for(i=0; i<64; ++i){    
             chunk_e[i]= _LROT32( _W(i+16-3) ^ _W(i+16-8) ^ _W(i+16-14) ^ _W(i+16-16), 1 );  
 		}
 		a=sha1_digest[4];
@@ -54,7 +53,7 @@ void sha1_addbyte(uint8_t c){
 				k=K4;
 				f=b ^ c ^ d;
 			}
-			temp =  e + k + f + _LROT32(a,5) + _W(i);
+			temp = e + k + f+_LROT32(a,5)+_W(i);
 			e = d;
 			d = c;
 			c = _LROT32(b,30);
@@ -77,13 +76,10 @@ void sha1_fill(int32_t len){
 	/*"append 0-bits to the message to obtain a length of len%512=448"*/
 	/*"append length of message in bits as 64-bit integer"*/
     uint8_t j;
-	for(j=0;j<(120-(len-(len/64)*64+1))%64+1;j++){
-		if(j==0){
-			sha1_addbyte(0x80);
-		}else{
-			sha1_addbyte(0x00);
-		
-        }
+    uint8_t end=(uint8_t)((120-(len-(len/64)*64+1))%64+1);
+    sha1_addbyte(0x80);
+	for(j=1;j<end;j++){
+		sha1_addbyte(0x00);
 	}
 	{
 		uint64_t l=len*8;