// IMPL.h

#define TYPE_ABC 0
#define TYPE_XYZ 1
#define TYPE_123 2

int strangecall(int type);


// IMPL.c

#define ANOTHER_TYPE_CON 1
#define ANOTHER_TYPE_SOL 2
#define ANOTHER_TYPE_ESS 3

int strangecall(int type) {
 int anothertype;

 switch(type) {
  case 0 :
   anothertype = ANOTHER_TYPE_CON;
   break;
  case 1 :
   anothertype = ANOTHER_TYPE_SOL;
   break;
  case 2 :
   anothertype = ANOTHER_TYPE_ESS;
   break;
  default :
   anothertype = 0;
 }

 // compiler makes this, because compiler is smart, even gcc is a littl bit smart
 anothertype = (0x39>>(type<<1))&3);
}