1 files changed, 61 insertions, 0 deletions
diff --git a/src/common/nullpo.hpp b/src/common/nullpo.hpp
new file mode 100644
index 0000000..7aff691
--- /dev/null
+++ b/src/common/nullpo.hpp
@@ -0,0 +1,61 @@
+/// 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_ret(t) \
+    if (nullpo_chk(NLP_MARK, t)) \
+        return 0;
+#  define nullpo_retv(t) \
+    if (nullpo_chk(NLP_MARK, t)) \
+        return;
+#  define nullpo_retr(ret, t) \
+    if (nullpo_chk(NLP_MARK, t)) \
+        return ret;
+#  define nullpo_ret_f(t, fmt, ...) \
+    if (nullpo_chk_f(NLP_MARK, t, fmt, ##__VA_ARGS__)) \
+        return 0;
+#  define nullpo_retv_f(t, fmt, ...) \
+    if (nullpo_chk_f(NLP_MARK, t, fmt, ##__VA_ARGS__)) \
+        return;
+#  define nullpo_retr_f(ret, t, fmt, ...) \
+    if (nullpo_chk_f(NLP_MARK, t, fmt, ##__VA_ARGS__)) \
+        return ret;
+# else // NULLPO_CHECK
+#  define nullpo_ret(t) t;
+#  define nullpo_retv(t) t;
+#  define nullpo_retr(ret, t) t;
+#  define nullpo_ret_f(t, fmt, ...) t;
+#  define nullpo_retv_f(t, fmt, ...) t;
+#  define nullpo_retr_f(ret, t, fmt, ...) t;
+# endif // NULLPO_CHECK
+
+# include "sanity.hpp"
+
+/// Used by macros in this header
+bool nullpo_chk (const char *file, int line, const char *func,
+                 const void *target);
+
+/// Used by macros in this header
+bool nullpo_chk_f (const char *file, int line, const char *func,
+                   const void *target, const char *fmt, ...)
+    __attribute__ ((format (printf, 5, 6)));
+
+/// Used only by map/battle.c
+void nullpo_info (const char *file, int line, const char *func);
+
+/// Not used
+void nullpo_info_f (const char *file, int line, const char *func,
+                    const char *fmt, ...)
+    __attribute__ ((format (printf, 4, 5)));
+
+#endif // NULLPO_HPP