Fixed UU-encoding

Fixed UU-encoding implementation

uucode.c

@@ -5,7 +5,6 @@
 
 int uuencode_line(const struct sprog_data *d, char *dst, int *offset, int *checksum) {
   char srcbuf[64];
-  unsigned char sum;
   char *dstd;
   int b;
   int n;
@@ -13,12 +12,10 @@ int uuencode_line(const struct sprog_data *d, char *dst, int *offset, int *check
   
   b = d->size - *offset;
   if(b>45) b = 45;
-  
-  sum = 0;
+
   for(i=0; i<b; i++) {
     srcbuf[i] = d->data[*offset + i];
-    sum += srcbuf[i];
-    *checksum += srcbuf[i];
+    *checksum += (unsigned char) srcbuf[i];
   }
   
   for(i=0; i<3; i++)
@@ -30,17 +27,16 @@ int uuencode_line(const struct sprog_data *d, char *dst, int *offset, int *check
   
   n = 0;
   for(i=0; i<b; i+=3) {
-    dstd[0] = srcbuf[i]>>2;
-    dstd[1] = srcbuf[i]<<4 | srcbuf[i+1]>>4;
-    dstd[2] = srcbuf[i+1]<<2 | srcbuf[i+2]>>6;
-    dstd[3] = srcbuf[i+2];
+    dstd[0] = (srcbuf[i]>>2) & 0x3f;
+    dstd[1] = (srcbuf[i]<<4 & 0x30) | (srcbuf[i+1]>>4 & 0x0f);
+    dstd[2] = (srcbuf[i+1]<<2 &0x3c) | (srcbuf[i+2]>>6 & 0x03);
+    dstd[3] = srcbuf[i+2] & 0x3f;
     dstd += 4;
     n += 4;
   }
   
   
   for(i=0; i<n+1; i++) {
-    dst[i] &= 0x3f;
     if(dst[i])
       dst[i] += ' ';
     else