int setjmp(int*);
int longjmp(int*,int);
int printf(const char*,...);

struct CbC_env {
  void *ret_p;
  int *env;
};

__code code1(int n,__code(*__return)(int,void *),void *__environment){
  printf("code1 : code entry1\n");
  goto __return(n,__environment);
}

__code return1 (int n,void* env){
  printf("return1 : __return entry\n");
  *(int*)((struct CbC_env *)(env))->ret_p = n;
  longjmp((((struct CbC_env *)env)->env),1);
}

int main1 (){
  __code (*__return)();
  struct CbC_env __environment;
  int i_buf[128];
  int retval;
  __environment.ret_p = &retval;
  __environment.env = i_buf;
  printf("main1 : main1 entry\n");
  if (setjmp(__environment.env)){
    printf("main1 : main1 return\n");
    return *((int *)__environment.ret_p);
  }
  __return = return1;
  goto code1(30,__return,&__environment);
  return 0;
}

int main (){
  int n;
  n = main1();
  printf("returned\n");
  printf("return = %d\n",n);
  return 1;
}