view fact-a2.c @ 16:23ad5811c88f

asm longjmp (can return correct address but return value is wrong)
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Sun, 24 Jan 2016 06:00:37 +0900
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#ifdef GCC
#define __environment _CbC_environment
#define __return _CbC_return
#endif

#include "stdio.h"

__code factorial(int n,int result,int orig,__code(*print)(int,int,int,__code(*)(),__code(*)(),void*),__code(*exit1)(int,void *), void *exit1env)
{
    if (n<0) {
      printf("#0008:err %d!\n",n);
      goto (*exit1)(0,exit1env);
    }
    if (n==0)
      goto (*print)(n,result,orig,print,exit1,exit1env);
    else {
      result *= n;
      n--;
      goto factorial(n,result,orig,print,exit1,exit1env);
    }
}


int main( int ac, char *av[])
{
  int n;
  n = 10;
  goto factorial(n,1,n,print,__return,__environment);
}

__code print(int n,int result,int orig,__code(*print)(),__code (*exit1)(int, void*),void*exit1env)
{
  printf("#0032:%d! = %d\n",orig, result);
  goto (*exit1)(0,exit1env);
}