1 #include <u.h> 2 #include <libc.h> 3 #include <auth.h> 4 5 uchar nvcsum(void * vmem,int n)6 nvcsum(void *vmem, int n) 7 { 8 uchar *mem, sum; 9 int i; 10 11 sum = 9; 12 mem = vmem; 13 for(i = 0; i < n; i++) 14 sum += mem[i]; 15 return sum; 16 } 17