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#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include "nullpo.h"
static void nullpo_info_core (const char *file, int line, const char *func,
const char *fmt, va_list ap);
/// Null check and print format
bool nullpo_chk_f (const char *file, int line, const char *func,
const void *target, const char *fmt, ...)
{
va_list ap;
if (target)
return 0;
va_start (ap, fmt);
nullpo_info_core (file, line, func, fmt, ap);
va_end (ap);
return 1;
}
bool nullpo_chk (const char *file, int line, const char *func,
const void *target)
{
if (target)
return 0;
nullpo_info_core (file, line, func, NULL, NULL);
return 1;
}
/// External functions
void nullpo_info_f (const char *file, int line, const char *func,
const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
nullpo_info_core (file, line, func, fmt, ap);
va_end (ap);
}
void nullpo_info (const char *file, int line, const char *func)
{
nullpo_info_core (file, line, func, NULL, NULL);
}
/// Actual output function
static void nullpo_info_core (const char *file, int line, const char *func,
const char *fmt, va_list ap)
{
if (!file)
file = "??";
if (!func || !*func)
func = "unknown";
fprintf (stderr, "%s:%d: in func `%s': NULL pointer\n", file, line, func);
if (fmt && *fmt)
{
vfprintf (stderr, fmt, ap);
if (fmt[strlen (fmt) - 1] != '\n')
fputc('\n', stderr);
}
}
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