From 50bbbbceee15210951842f5bd88b66167f43c0ca Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Sat, 1 Jul 2017 12:51:12 -0400
Subject: [PATCH] Forther break apart the magic enconding of travel arrays.

---
 main.c          |  4 ++--
 make_dungeon.py | 17 +++++++++--------
 2 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/main.c b/main.c
index 306ce73..fc4f9be 100644
--- a/main.c
+++ b/main.c
@@ -628,7 +628,7 @@ static bool playermove( int motion)
                         BUG(CONDITIONAL_TRAVEL_ENTRY_WITH_NO_ALTERATION); // LCOV_EXCL_LINE
                     ++te_tmp;
                 } while
-                (T_HIGH(travel[travel_entry]) == T_HIGH(travel[te_tmp]));
+			((T_DESTINATION(travel[travel_entry]) == T_DESTINATION(travel[te_tmp])) && (T_CONDITION(travel[travel_entry]) == T_CONDITION(travel[te_tmp])));
                 travel_entry = te_tmp;
             }
 
@@ -670,7 +670,7 @@ static bool playermove( int motion)
                             BUG(CONDITIONAL_TRAVEL_ENTRY_WITH_NO_ALTERATION); // LCOV_EXCL_LINE
                         ++te_tmp;
                     } while
-                    (T_HIGH(travel[travel_entry]) == T_HIGH(travel[te_tmp]));
+			((T_DESTINATION(travel[travel_entry]) == T_DESTINATION(travel[te_tmp])) && (T_CONDITION(travel[travel_entry]) == T_CONDITION(travel[te_tmp])));
                     travel_entry = te_tmp;
                     continue; /* goto L12 */
                 case 3:
diff --git a/make_dungeon.py b/make_dungeon.py
index 5618e63..b893e4b 100755
--- a/make_dungeon.py
+++ b/make_dungeon.py
@@ -146,6 +146,7 @@ typedef struct {{
 
 typedef struct {{
   const long motion;
+  const long cond;
   const long dest;
   const bool stop;
 }} travelop_t;
@@ -155,10 +156,9 @@ typedef struct {{
  * inherited from FORTRAN, someday. To understand these, read the
  * encoding description for travel.
  */
-#define T_DESTINATION(entry)	MOD((entry).dest, 1000)
-#define T_CONDITION(entry)	((entry).dest / 1000)
+#define T_DESTINATION(entry)	(entry).dest
+#define T_CONDITION(entry)	(entry).cond
 #define T_NODWARVES(entry)	(T_CONDITION(entry) == 100)
-#define T_HIGH(entry)		((entry).dest)
 #define T_TERMINATE(entry)	((entry).motion == 1)
 #define L_SPEAK(loc)		((loc) - 500)
 
@@ -670,7 +670,7 @@ def buildtravel(locs, objs):
     #
     # In order to de-crypticize the runtime code, we're going to break these
     # magic numbers up into a struct.
-    travel = [[0, 0, False]]
+    travel = [[0, 0, 0, False]]
     tkey = [0]
     oldloc = 0
     while ltravel:
@@ -681,22 +681,23 @@ def buildtravel(locs, objs):
             tkey.append(len(travel))
             oldloc = loc 
         elif travel:
-            travel[-1][2] = not travel[-1][2]
+            travel[-1][-1] = not travel[-1][-1]
         while rule:
-            travel.append([rule.pop(0), newloc, False])
-        travel[-1][2] = True
+            travel.append([rule.pop(0), newloc // 1000, newloc % 1000, False])
+        travel[-1][-1] = True
     return (travel, tkey)
 
 def get_travel(travel):
     template = """    {{
         .motion = {},
+        .cond = {},
         .dest = {},
         .stop = {},
     }},
 """
     out = ""
     for entry in travel:
-        out += template.format(entry[0], entry[1], entry[2]).lower()
+        out += template.format(entry[0], entry[1], entry[2], entry[3]).lower()
     out = out[:-1] # trim trailing newline
     return out
 
-- 
2.31.1