From fc6bb36ee41413c8fc6f6dcd329b90b39f17e5fe Mon Sep 17 00:00:00 2001
From: Enno Rehling <enno.rehling@gmail.com>
Date: Sun, 24 Mar 2019 21:27:43 +0100
Subject: [PATCH] BUG 2566 mountains with no low-level resources. NB: new data
 version

---
 src/kernel/gamedata.h |  3 ++-
 src/kernel/save.c     | 26 ++++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/src/kernel/gamedata.h b/src/kernel/gamedata.h
index e14c0a551..986b13d1d 100644
--- a/src/kernel/gamedata.h
+++ b/src/kernel/gamedata.h
@@ -41,8 +41,9 @@
 #define CRYPT_VERSION 363 /* passwords are encrypted */
 #define FAMILIAR_FIXMAGE_VERSION 364 /* familiar links are fixed */
 #define FAMILIAR_FIXSPELLBOOK_VERSION 365 /* familiar spells are fixed */
+#define FIX_STARTLEVEL_VERSION 366 /* fixing resource startlevels */
 
-#define RELEASE_VERSION FAMILIAR_FIXSPELLBOOK_VERSION /* current datafile */
+#define RELEASE_VERSION FIX_STARTLEVEL_VERSION /* current datafile */
 #define MIN_VERSION UIDHASH_VERSION      /* minimal datafile we support */
 #define MAX_VERSION RELEASE_VERSION /* change this if we can need to read the future datafile, and we can do so */
 
diff --git a/src/kernel/save.c b/src/kernel/save.c
index 45da22a7c..0b3ade593 100644
--- a/src/kernel/save.c
+++ b/src/kernel/save.c
@@ -613,6 +613,27 @@ static void read_regioninfo(gamedata *data, const region *r, char *info, size_t
     }
 }
 
+static void fix_baselevel(region *r) {
+    struct terrain_production *p;
+    for (p = r->terrain->production; p->type; ++p) {
+        char *end;
+        long start = (int)strtol(p->startlevel, &end, 10);
+        if (*end == '\0') {
+            rawmaterial *res;
+            for (res = r->resources; res; res = res->next) {
+                if (p->type == res->rtype) {
+                    if (start != res->startlevel) {
+                        log_debug("setting resource start level for %s in %s to %d",
+                            res->rtype->_name, regionname(r, NULL), start);
+                        res->startlevel = start;
+                    }
+                }
+            }
+        }
+
+    }
+}
+
 static region *readregion(gamedata *data, int x, int y)
 {
     region *r;
@@ -781,6 +802,11 @@ static region *readregion(gamedata *data, int x, int y)
         }
     }
     read_attribs(data, &r->attribs, r);
+
+    if (r->resources && data->version < FIX_STARTLEVEL_VERSION) {
+        /* we had some badly made rawmaterials before this */
+        fix_baselevel(r);
+    }
     return r;
 }