shift_test.c

   1 #include "sparrow.h"
   2 #include <string.h>
   3 #include <math.h>
   4
   5
   6 static inline char *
   7 int64_to_binary_string(char *s, guint64 n){
   8   /* s should be a *65* byte array */
   9   int i;
  10   guint64 bit = 1ULL << 63;
  11   for (i = 0; i < 64; i++){
  12     s[i] = (n & (1ULL << (63 - i))) ? '*' : '.';
  13     //s[i] = ((n & bit)) ? '*' : '.';
  14     //bit >>= 1;
  15   }
  16   s[64] = 0;
  17   return s;
  18 }
  19
  20 static void
  21 test_shifts()
  22 {
  23   static char s[65];
  24   guint64 x = 1;
  25   int i;
  26   for (i = 0; i < 64; i++){
  27     int64_to_binary_string(s, x);
  28     printf("%s, %llx, %16llx\n", s, x, x);
  29     x <<= 1;
  30   }
  31 }
  32
  33 int main()
  34 {
  35   test_shifts();
  36 }