One bit less math on states

[open-adventure.git] / advent.h

diff --git a/advent.h b/advent.h
index cca1dbab1d328e310643fc1f389639d03444f0c4..470e79ff5879d1a369dd30e308cf6f06a9d29789 100644 (file)
--- a/advent.h
+++ b/advent.h
@@ -27,7 +27,17 @@
 
 /* Special object-state values - integers > 0 are object-specific */
 #define STATE_NOTFOUND  -1       // 'Not found" state of treasures */
-#define STATE_GROUND   0         // After discovered, before messed with
+#define STATE_FOUND    0         // After discovered, before messed with
+#define STATE_IN_CAVITY        1         // State value common to all gemstones
+
+/* Special fixed object-state values - integers > 0 are location */
+#define IS_FIXED -1
+#define IS_FREE 0
+
+/* Map a state property value to a negative range, where the object cannot be
+ * picked up but the value can be recovered later.  Avoid colliding with -1,
+ * which has its own meaning. */
+#define STASHED(obj)   (-1 - game.prop[obj])
 
 /*
  *  MOD(N,M)    = Arithmetic modulus
@@ -185,7 +195,7 @@ struct command_t {
     token_t wd2;
     long id1;
     long id2;
-    char raw1[BUFSIZ], raw2[BUFSIZ];
+    char raw1[LINESIZE], raw2[LINESIZE];
 };
 
 extern struct game_t game;
@@ -232,6 +242,8 @@ extern int resume(void);
 extern int restore(FILE *);
 extern long initialise(void);
 extern int action(struct command_t *command);
+extern void state_change(long obj, long state);
+
 
 void bug(enum bugtype, const char *) __attribute__((__noreturn__));