From 5c31445117ea88061dc4ee60e0dec4d11c8c3ed7 Mon Sep 17 00:00:00 2001
From: Perttu Ahola <celeron55@gmail.com>
Date: Tue, 24 Jul 2012 14:56:32 +0300
Subject: Improve node timer format (map format version 25) and update
 mapformat.txt

---
 src/mapblock.cpp    | 23 ++++++++++++++++++-----
 src/nodetimer.cpp   | 43 +++++++++++++++++++++++++++----------------
 src/nodetimer.h     |  4 ++--
 src/serialization.h |  5 +++--
 4 files changed, 50 insertions(+), 25 deletions(-)

(limited to 'src')

diff --git a/src/mapblock.cpp b/src/mapblock.cpp
index c7c820d42..b2da768f5 100644
--- a/src/mapblock.cpp
+++ b/src/mapblock.cpp
@@ -612,8 +612,10 @@ void MapBlock::serialize(std::ostream &os, u8 version, bool disk)
 	*/
 	if(disk)
 	{
-		// Node timers
-		m_node_timers.serialize(os);
+		if(version <= 24){
+			// Node timers
+			m_node_timers.serialize(os, version);
+		}
 
 		// Static objects
 		m_static_objects.serialize(os);
@@ -623,6 +625,11 @@ void MapBlock::serialize(std::ostream &os, u8 version, bool disk)
 
 		// Write block-specific node definition id mapping
 		nimap.serialize(os);
+		
+		if(version >= 25){
+			// Node timers
+			m_node_timers.serialize(os, version);
+		}
 	}
 }
 
@@ -696,10 +703,10 @@ void MapBlock::deSerialize(std::istream &is, u8 version, bool disk)
 			// Read unused zero
 			readU8(is);
 		}
-		else if(version >= 24){
+		if(version == 24){
 			TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
-					<<": Node timers"<<std::endl);
-			m_node_timers.deSerialize(is);
+					<<": Node timers (ver==24)"<<std::endl);
+			m_node_timers.deSerialize(is, version);
 		}
 
 		// Static objects
@@ -719,6 +726,12 @@ void MapBlock::deSerialize(std::istream &is, u8 version, bool disk)
 		NameIdMapping nimap;
 		nimap.deSerialize(is);
 		correctBlockNodeIds(&nimap, data, m_gamedef);
+
+		if(version >= 25){
+			TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
+					<<": Node timers (ver>=25)"<<std::endl);
+			m_node_timers.deSerialize(is, version);
+		}
 	}
 		
 	TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
diff --git a/src/nodetimer.cpp b/src/nodetimer.cpp
index b20bcf578..bf1e7435d 100644
--- a/src/nodetimer.cpp
+++ b/src/nodetimer.cpp
@@ -42,19 +42,22 @@ void NodeTimer::deSerialize(std::istream &is)
 	NodeTimerList
 */
 
-void NodeTimerList::serialize(std::ostream &os) const
+void NodeTimerList::serialize(std::ostream &os, u8 map_format_version) const
 {
-	/*
-		Version 0 is a placeholder for "nothing to see here; go away."
-	*/
-
-	if(m_data.size() == 0){
-		writeU8(os, 0); // version
-		return;
+	if(map_format_version == 24){
+		// Version 0 is a placeholder for "nothing to see here; go away."
+		if(m_data.size() == 0){
+			writeU8(os, 0); // version
+			return;
+		}
+		writeU8(os, 1); // version
+		writeU16(os, m_data.size());
 	}
 
-	writeU8(os, 1); // version
-	writeU16(os, m_data.size());
+	if(map_format_version >= 25){
+		writeU8(os, 2+4+4);
+		writeU16(os, m_data.size());
+	}
 
 	for(std::map<v3s16, NodeTimer>::const_iterator
 			i = m_data.begin();
@@ -68,15 +71,23 @@ void NodeTimerList::serialize(std::ostream &os) const
 	}
 }
 
-void NodeTimerList::deSerialize(std::istream &is)
+void NodeTimerList::deSerialize(std::istream &is, u8 map_format_version)
 {
 	m_data.clear();
+	
+	if(map_format_version == 24){
+		u8 timer_version = readU8(is);
+		if(timer_version == 0)
+			return;
+		if(timer_version != 1)
+			throw SerializationError("unsupported NodeTimerList version");
+	}
 
-	u8 version = readU8(is);
-	if(version == 0)
-		return;
-	if(version != 1)
-		throw SerializationError("unsupported NodeTimerList version");
+	if(map_format_version >= 25){
+		u8 timer_data_len = readU8(is);
+		if(timer_data_len != 2+4+4)
+			throw SerializationError("unsupported NodeTimer data length");
+	}
 
 	u16 count = readU16(is);
 
diff --git a/src/nodetimer.h b/src/nodetimer.h
index f8d3e1c57..c643ab888 100644
--- a/src/nodetimer.h
+++ b/src/nodetimer.h
@@ -57,8 +57,8 @@ public:
 	NodeTimerList() {}
 	~NodeTimerList() {}
 	
-	void serialize(std::ostream &os) const;
-	void deSerialize(std::istream &is);
+	void serialize(std::ostream &os, u8 map_format_version) const;
+	void deSerialize(std::istream &is, u8 map_format_version);
 	
 	// Get timer
 	NodeTimer get(v3s16 p){
diff --git a/src/serialization.h b/src/serialization.h
index 0d74ccf48..533ddc8c4 100644
--- a/src/serialization.h
+++ b/src/serialization.h
@@ -59,12 +59,13 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 	21: dynamic content type allocation
 	22: minerals removed, facedir & wallmounted changed
 	23: new node metadata format
-	24: 16-bit node ids and node timers
+	24: 16-bit node ids and node timers (never released as stable)
+	25: Improved node timer format
 */
 // This represents an uninitialized or invalid format
 #define SER_FMT_VER_INVALID 255
 // Highest supported serialization version
-#define SER_FMT_VER_HIGHEST 24
+#define SER_FMT_VER_HIGHEST 25
 // Lowest supported serialization version
 #define SER_FMT_VER_LOWEST 0
 
-- 
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