#include "stdio.h"

f0(int i) {
    int k,j;
    k = 3+i;
    j = g0(i+3);
    return k+4+j;
}

g0(int i) {
    return i+4;
}

typedef char *stack;

struct cont_interface { // General Return Continuation
    code (*ret)();
};

code f(int i,stack sp) {
    int k,j;
    k = 3+i;
    goto f_g0(i,k,sp);
}

struct f_g0_interface {  // Specialized Return Continuation
    code (*ret)();
    int i_,k_,j_;
};

code f_g1(int j,stack sp);

code f_g0(int i,int k,stack sp) { // Caller
    struct f_g0_interface *c = 
	(struct f_g0_interface *)(sp -= sizeof(struct f_g0_interface));

    c->ret = f_g1;
    c->k_ = k;
    c->i_ = i;

    goto g(i+3,sp);
}

code f_g1(int j,stack sp) {  // Continuation 
    struct f_g0_interface *c = sp;
    int k = c->k_;
    sp += sizeof(struct f_g0_interface);
    goto (( (struct cont_interface *)sp)->ret)(k+4+j,sp);
}

code g(int i,stack sp) {
    goto (( (struct cont_interface *)sp)->ret)(i+4,sp);
}

struct main_continuation { // General Return Continuation
    code (*ret)();
    code (*main_ret)();
    void *env;
};

code main_return(int i,stack sp) {
    printf("#0061:%d\n",i);
    goto (( (struct main_continuation *)sp)->main_ret)(0),
           ((struct main_continuation *)sp)->env;
}

#define STACK_SIZE 2048
stack main_stack[STACK_SIZE];
#define stack_last (&main_stack[STACK_SIZE])

main()
{
    struct main_continuation *cont;
    stack sp = stack_last;

    printf("#0075:%d\n",f0(233));

    sp -= sizeof(*cont);
    cont = (struct main_continuation *)sp;
    cont->ret = main_return;
    cont->main_ret = return;
    cont->env = environment;
    goto f(233,sp);
}

/* end */