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#include "apue.h"
#include <setjmp.h>

static void f1(int, int, int, int);
static void f2(void);

static jmp_buf jmpbuffer;
static int globval;

int main(void) {
    int autoval;
    register int regival;
    volatile int volaval;
    static int statval;

    globval = 1; autoval = 2; regival = 3; volaval = 4; statval = 5;

    if (setjmp(jmpbuffer) != 0) {
        printf("after longjmp:\n");
        printf("globval = %d, autoval = %d, regival = %d, volaval = %d, statval = %d\n",
               globval, autoval, regival, volaval, statval);
        exit(0);
    }

    autoval = 95; regival = 96; volaval = 97; statval = 98;
    f1(autoval, regival, volaval, statval); // This will cause a longjmp
    exit(0);
}

static void f1(int i, int j, int k, int l) {
    printf("in f1():\n");
    printf("globval = %d, autoval = %d, regival = %d, volaval = %d, statval = %d\n",
           globval, i, j, k, l);
    f2();
}

static void f2(void) {
    longjmp(jmpbuffer, 1);
}