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/// return wrappers for unexpected NULL pointers
#ifndef NULLPO_HPP
#define NULLPO_HPP
/// Comment this out to live dangerously
# define NULLPO_CHECK
/// All functions print to standard error (was: standard output)
/// nullpo_ret(cond) - return 0 if given pointer is NULL
/// nullpo_retv(cond) - just return (function returns void)
/// nullpo_retr(rv, cond) - return given value instead
/// the _f variants take a printf-format string and arguments
# ifdef NULLPO_CHECK
# define NLP_MARK __FILE__, __LINE__, __func__
# define nullpo_retr(ret, t) \
if (nullpo_chk(NLP_MARK, t)) \
return ret;
# else // NULLPO_CHECK
# define nullpo_retr(ret, t) t;
# endif // NULLPO_CHECK
# define nullpo_ret(t) nullpo_retr(0, t)
# define nullpo_retv(t) nullpo_retr(, t)
# include "sanity.hpp"
/// Used by macros in this header
bool nullpo_chk(const char *file, int line, const char *func,
const void *target);
/// Used only by map/battle.c
void nullpo_info(const char *file, int line, const char *func);
#endif // NULLPO_HPP
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