--- /dev/null
+/* Nitfol - z-machine interpreter using Glk for output.
+ Copyright (C) 1999 Evin Robertson
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
+
+ The author can be reached at nitfol@deja.com
+*/
+#include "nitfol.h"
+
+#ifdef HEADER
+typedef enum { E_INSTR, E_OBJECT, E_STACK, E_MEMORY, E_MATH, E_STRING,
+ E_OUTPUT, E_SOUND, E_SYSTEM, E_VERSION, E_CORRUPT, E_SAVE,
+ E_DEBUG } errortypes;
+#endif
+
+static const char *errortypenames[] = {
+ "instruc",
+ "object",
+ "stack",
+ "memory",
+ "math",
+ "string",
+ "output",
+ "sound",
+ "system",
+ "version",
+ "corrupt",
+ "save",
+ "debug"
+};
+
+
+/* These all feature loop detection, so if error reporting spawns another
+ error, we won't infinite loop. Hopefully.
+*/
+
+void n_show_warn(errortypes type, const char *message, offset number)
+{
+ if(!ignore_errors && allow_output) {
+ showstuff("WARN", errortypenames[type], message, number);
+ }
+}
+
+void n_show_port(errortypes type, const char *message, offset number)
+{
+ if(!ignore_errors && allow_output) {
+ showstuff("PORT", errortypenames[type], message, number);
+ }
+}
+
+void n_show_error(errortypes type, const char *message, offset number)
+{
+ if(!ignore_errors && allow_output) {
+ showstuff("ERROR", errortypenames[type], message, number);
+ }
+}
+
+/* showstuff calls n_show_fatal if it's looping uncontrollably, but it
+ disables its loopiness detector so it can show this fatal error. So
+ n_show_fatal needs its own loop detection. */
+void n_show_fatal(errortypes type, const char *message, offset number)
+{
+ static BOOL loopy = FALSE;
+ if(loopy) {
+ /* puts("loopy"); */
+ glk_exit();
+ }
+ loopy = TRUE;
+ showstuff("FATAL", errortypenames[type], message, number);
+ loopy = FALSE;
+
+ glk_exit();
+}
+
+void n_show_debug(errortypes type, const char *message, offset number)
+{
+#ifndef HIDE_DEBUG
+ static BOOL loopy = FALSE;
+ if(loopy)
+ n_show_fatal(E_SYSTEM, "loopy debug error", 0);
+ loopy = TRUE;
+ showstuff("E_DEBUG", errortypenames[type], message, number);
+ loopy = FALSE;
+#endif
+}
+
+zword z_range_error(offset p)
+{
+ if(!ignore_errors) {
+ static BOOL loopy = FALSE;
+ if(loopy)
+ n_show_fatal(E_SYSTEM, "loopy range error", 0);
+ loopy = TRUE;
+ showstuff("RANGE", errortypenames[E_MEMORY], "invalid memory access", p);
+ loopy = FALSE;
+ }
+ return 0;
+}