#ifndef _TEST_UTILITIES_H
#define _TEST_UTILITIES_H

#include <iostream>
#include <signal.h>
#include <unistd.h>

#define test(p,a,b) test_test(p,a,b,__FILE__,__LINE__)
#define die(msg) do { \
    std::cerr << __FILE__ << ":" << __LINE__ << ": Fatal error: " << msg << std::endl; \
    test_report();							\
    signal(SIGQUIT, NULL); \
    kill(0, SIGQUIT); \
} while(0)
  
struct SIGLISTTYPE {
  char *name;
  int num;
  char *comment;
} siglist[] = {
  {"SIGILL",	4	, "illegal instruction (not reset when caught) "},
  {"SIGTRAP",	5	, "trace trap (not reset when caught) "},
  {"SIGABRT",	6	, "abort() "},
  {"SIGEMT",	7	, "EMT instruction "},
  {"SIGFPE",	8	, "floating point exception "},
  {"SIGBUS",	10	, "bus error "},
  {"SIGSEGV",	11	, "segmentation violation "},
  {"SIGSYS",	12	, "bad argument to system call "},
  {"SIGPIPE",	13	, "write on a pipe with no one to read it "},
  {"SIGALRM",	14	, "alarm clock -- is your running time too slow? "},
  {"???", -1	, "UNKNOWN"},
};

class SelfInitInt {
 public:
  int i;
  SelfInitInt() : i (3141159) {};
};

std::ostream& operator<<(std::ostream& out, const SelfInitInt& x) {
  out << x.i;
  return out;
}

char *title;

int score = 0, possible = 0;

typedef void (*sig_t)(int);

int signal_count = 0;
int signalled = 0;

void test_report() {
  std::cout << title << ": score " << score 
	    << " out of " << possible 
	    << " possible " << std::endl;
}

void 
test_trap_signal(int sig) {
  
  int i =  0;
  while(siglist[i].num != -1 && siglist[i].num != sig)  
    ++i;

  die("signal " << siglist[i].name << " [ " << siglist[i].comment << "] received.");
}

void test_init(int poss, char *t) {
  possible = poss;
  title = t;
  for(int i = 0;  siglist[i].num != -1; ++i)
    signal(i, test_trap_signal);
}

void test_test(int points, int condn, char *err_msg, char* file, int line) {

  if (signalled == 0 && condn) {
    score += points;
  } else {
    std::cerr << file
	      << ":" 
	      << line
	      << ": Test failed. " 
	      << err_msg
	      << ", -"
	      << points 
	      << "points." 
	      << std::endl;
  }
}

#endif