+/*** Modules ***/
+
+// paperjam.cc
+
+extern const char *in_name, *out_name;
+extern bool recalc_bbox;
+extern int debug_level;
+extern int debug_indent;
+
+void debug(const char *msg, ...) FORMAT_CHECK(printf, 1, 2);
+void warn(const char *msg, ...) FORMAT_CHECK(printf, 1, 2);
+void die(const char *msg, ...) FORMAT_CHECK(printf, 1, 2) NONRET;
+
+// This one is called during execution of commands and propagated as an exception
+void err(const char *msg, ...) FORMAT_CHECK(printf, 1, 2) NONRET;
+
+class paperjam_error : public exception {
+ string message;
+public:
+ paperjam_error(string m) : message(m) { }
+ const char *what() const noexcept override { return message.c_str(); }
+};
+