ex20.c

//#define NDEBUG
#include "dbg.h"
#include <stdlib.h>
#include <stdio.h>

void test_debug()
{
  // notice you don't need the \n
  debug("I have Brown Hair.");

  // passing in arguments like printf
  debug("I am %d years old.",37);
}

void test_log_err()
{
  log_err("I believe everything is broken.");
  log_err("There are %d problems in %s.",0,"space");
}

void test_log_warn()
{
  log_warn("You can safely ignore this.");
  log_warn("Maybe consider looking at:%s.","/etc/passwd");
}

void test_log_info()
{
  log_info("Well I did something mundane.");
  log_info("It happend %f times today.",1.3f);
}

int test_check(char *file_name)
{
  FILE *input=NULL;
  char *block=NULL;

  block=malloc(100);
  check_mem(block);     //should work

  input=fopen(file_name,"r");
  check(input,"Failed to open %s.",file_name);

  free(block);
  fclose(input);
  return 0;

error:
  if(block) free(block);
  if(input) fclose(input);
  return -1;
}

int test_sentinel(int code)
{
  char *temp=malloc(100);
  check_mem(temp);

  switch(code){
    case 1:
      log_info("It worked.");
      break;
    default:
      sentinel("I shouldn't run.");
  }

  free(temp);
  return 0;

error:
  if(temp)  free(temp);
  return -1;
}

int test_check_mem()
{
  char *test=NULL;
  check_mem(test);

  free(test);
  return 1;

error:
  return -1;
}

int test_check_debug()
{
  int i=0;
  check_debug(i!=0,"Oops,I was 0.");

  return 0;

error:
  return -1;
}

int main(int argc,char *argv[])
{
  check(argc==2,"Need an argument.");

  test_debug();
  test_log_err();
  test_log_warn();
  test_log_info();

  check(test_check("ex20.c")==0,"Failed with ex20.c");
  check(test_check(argv[1])==-1,"Failed with argv");
  check(test_sentinel(1)==0,"test_sentinel failed.");
  check(test_sentinel(100)==-1,"test_sentinel failed.");
  check(test_check_mem()==-1,"test_check_mem failed.");
  check(test_check_debug()==-1,"test_check_debug failed.");

  return 0;

error:
  return -1;
}