#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdarg.h>

#ifdef _WIN32
#define vsnprintf _vsnprintf
#endif

char * _file;
int _line;

#define debug _file = __FILE__, _line = __LINE__, format

#define vsnprintf_loop(buf, buflen, format, written)                          \
{                                                                             \
  int _rc;                                                                    \
  va_list _vl;                                                                \
  unsigned int _count;                                                        \
                                                                              \
  _count = 0;                                                                 \
                                                                              \
  va_start(_vl, format);                                                      \
  _rc = vsnprintf(buf, buflen - _count, format, _vl);                         \
  if(_rc < 0) {                                                               \
    fprintf(stderr, "!!! EVENT REPORTING FAILED at %s(%i): vsnprintf() returned error code %i in vsnprintf_loop(): %s", \
            __FILE__, __LINE__, _rc, strerror(errno));                        \
    return;                                                                   \
  }                                                                           \
  _count += _rc;                                                              \
  buf[_count] = '\0';                                                         \
  va_end(_vl);                                                                \
                                                                              \
  *written = _count;                                                          \
}

static char buf[4096];

void format(char * format, ...)
{
  unsigned int written;
  
  vsnprintf_loop(buf, sizeof(buf), format, &written);
  printf("%s(%i): %s", _file, _line, buf);
}

int main(void) 
{
  char hello[] = "Hello, World!!!!";

  if(1)
    debug("crap: %u %s %i %c\n", 1, "poo", -5, '#');
  else
    debug("nothing to see here");

  return 0;
}