From 773e50d73819e0b5b3650823741f1148dd5970ba Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Sun, 19 Nov 2006 17:00:11 +0100
Subject: [PATCH] rnd-20061119-1-src * small change to handle loading empty
 element/content list micro chunks * uploaded pre-release (test) version
 3.2.3-0 binary and source code

---
 ChangeLog      |  6 ++++++
 src/conftime.h |  2 +-
 src/files.c    | 37 +++++++++++++++++++++++++++++++++----
 3 files changed, 40 insertions(+), 5 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 3a9a419f..1990c249 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2006-11-19
+	* small change to handle loading empty element/content list micro chunks
+
+2006-11-03
+	* uploaded pre-release (test) version 3.2.3-0 binary and source code
+
 2006-11-01
 	* some optimizations on startup speed by reducing initial text output
 
diff --git a/src/conftime.h b/src/conftime.h
index fe76eb58..b7a1b2ad 100644
--- a/src/conftime.h
+++ b/src/conftime.h
@@ -1 +1 @@
-#define COMPILE_DATE_STRING "[2006-11-02 01:49]"
+#define COMPILE_DATE_STRING "[2006-11-19 16:55]"
diff --git a/src/files.c b/src/files.c
index 3d6af17c..4dc5608a 100644
--- a/src/files.c
+++ b/src/files.c
@@ -1249,7 +1249,11 @@ static void setEventFlagsFromEventBits(struct ElementChangeInfo *change)
 {
   int i;
 
-  /* important: only change event flag if corresponding event bit is set */
+  /* important: only change event flag if corresponding event bit is set
+     (this is because all xx_event_bits[] values are loaded separately,
+     and all xx_event_bits[] values are set back to zero before loading
+     another value xx_event_bits[x] (each value representing 32 flags)) */
+
   for (i = 0; i < NUM_CHANGE_EVENTS; i++)
     if (xx_event_bits[CH_EVENT_BITFIELD_NR(i)] & CH_EVENT_BIT(i))
       change->has_event[i] = TRUE;
@@ -1259,7 +1263,11 @@ static void setEventBitsFromEventFlags(struct ElementChangeInfo *change)
 {
   int i;
 
-  /* important: only change event bit if corresponding event flag is set */
+  /* in contrast to the above function setEventFlagsFromEventBits(), it
+     would also be possible to set all bits in xx_event_bits[] to 0 or 1
+     depending on the corresponding change->has_event[i] values here, as
+     all xx_event_bits[] values are reset in resetEventBits() before */
+
   for (i = 0; i < NUM_CHANGE_EVENTS; i++)
     if (change->has_event[i])
       xx_event_bits[CH_EVENT_BITFIELD_NR(i)] |= CH_EVENT_BIT(i);
@@ -1446,7 +1454,11 @@ void setElementChangePages(struct ElementInfo *ei, int change_pages)
 void setElementChangeInfoToDefaults(struct ElementChangeInfo *change)
 {
   xx_change = *change;		/* copy change data into temporary buffer */
+
+#if 0
+  /* (not needed; set by setConfigToDefaultsFromConfigList()) */
   xx_num_contents = 1;
+#endif
 
   setConfigToDefaultsFromConfigList(chunk_config_CUSX_change);
 
@@ -2606,7 +2618,21 @@ static int LoadLevel_MicroChunk(FILE *file, struct LevelFileConfigInfo *conf,
 	  num_entities = max_num_entities;
 	}
 
-	*(int *)(conf[i].num_entities) = num_entities;
+	if (num_entities == 0 && (data_type == TYPE_ELEMENT_LIST ||
+				  data_type == TYPE_CONTENT_LIST))
+	{
+	  /* for element and content lists, zero entities are not allowed */
+	  Error(ERR_WARN, "found empty list of entities for element %d",
+		element);
+
+	  /* do not set "num_entities" here to prevent reading behind buffer */
+
+	  *(int *)(conf[i].num_entities) = 1;	/* at least one is required */
+	}
+	else
+	{
+	  *(int *)(conf[i].num_entities) = num_entities;
+	}
 
 	element_found = TRUE;
 
@@ -5120,8 +5146,11 @@ static int SaveLevel_CUSX(FILE *file, struct LevelInfo *level, int element)
   /* set default description string for this specific element */
   strcpy(xx_default_description, getDefaultElementDescription(ei));
 
-  /* set (fixed) number of content areas (may have been overwritten earlier) */
+#if 0
+  /* set (fixed) number of content areas (may be wrong by broken level file) */
+  /* (this is now directly corrected for broken level files after loading) */
   xx_num_contents = 1;
+#endif
 
   for (i = 0; chunk_config_CUSX_base[i].data_type != -1; i++)
     chunk_size += SaveLevel_MicroChunk(file, &chunk_config_CUSX_base[i], FALSE);
-- 
2.34.1