From e63a04085cf4a7a89eca1968bb5c1631f6202815 Mon Sep 17 00:00:00 2001
From: Elias Fleckenstein <eliasfleckenstein@web.de>
Date: Sat, 16 Jul 2022 22:43:36 +0200
Subject: [PATCH] Skip special ids

---
 deserialize.go | 30 ++++++++----------------------
 serialize.go   | 14 ++++++++++++--
 types.go       | 21 +++++++++++++++++++++
 3 files changed, 41 insertions(+), 24 deletions(-)

diff --git a/deserialize.go b/deserialize.go
index 90af77c..7980ca6 100644
--- a/deserialize.go
+++ b/deserialize.go
@@ -4,7 +4,6 @@ import (
 	"compress/zlib"
 	"encoding/binary"
 	"errors"
-	"fmt"
 	"github.com/anon55555/mt"
 	"io"
 )
@@ -18,22 +17,6 @@ var (
 	ErrInvalidStaticObjVer = errors.New("invalid static object version")
 )
 
-type ErrInvalidNodeName struct {
-	Name string
-}
-
-func (e ErrInvalidNodeName) Error() string {
-	return fmt.Sprintf("invalid node \"%v\"", e.Name)
-}
-
-type ErrInvalidNodeId struct {
-	Id mt.Content
-}
-
-func (e ErrInvalidNodeId) Error() string {
-	return fmt.Sprintf("invalid node %v", e.Id)
-}
-
 func Deserialize(r io.Reader, idNameMap map[string]mt.Content) *MapBlk {
 	var blk = &MapBlk{}
 
@@ -261,17 +244,20 @@ func Deserialize(r io.Reader, idNameMap map[string]mt.Content) *MapBlk {
 	}
 
 	for i := 0; i < 4096; i++ {
-		name, ok := nameIdMap[blk.Param0[i]]
+		id := blk.Param0[i]
+		if isSpecial(id) {
+			continue
+		}
+
+		name, ok := nameIdMap[id]
 		if !ok {
-			panic(ErrInvalidNodeId{blk.Param0[i]})
+			panic(ErrInvalidNodeId{id})
 		}
 
-		id, ok := idNameMap[name]
+		blk.Param0[i], ok = idNameMap[name]
 		if !ok {
 			panic(ErrInvalidNodeName{name})
 		}
-
-		blk.Param0[i] = id
 	}
 
 	return blk
diff --git a/serialize.go b/serialize.go
index 4001dc7..b89a32e 100644
--- a/serialize.go
+++ b/serialize.go
@@ -153,11 +153,21 @@ func Serialize(blk *MapBlk, w io.Writer, nameIdMap map[mt.Content]string) {
 
 	var localNameIdMap = make(map[mt.Content]string)
 	for i := 0; i < 4096; i++ {
-		if _, ok := localNameIdMap[blk.Param0[i]]; ok {
+		id := blk.Param0[i]
+		if isSpecial(id) {
 			continue
 		}
 
-		localNameIdMap[blk.Param0[i]] = nameIdMap[blk.Param0[i]]
+		if _, ok := localNameIdMap[id]; ok {
+			continue
+		}
+
+		name, ok := nameIdMap[id]
+		if !ok {
+			panic(ErrInvalidNodeId{id})
+		}
+
+		localNameIdMap[id] = name
 	}
 
 	var nameIdMapCount = uint16(len(localNameIdMap))
diff --git a/types.go b/types.go
index abb02e2..bd51350 100644
--- a/types.go
+++ b/types.go
@@ -1,6 +1,7 @@
 package mtmap
 
 import (
+	"fmt"
 	"github.com/anon55555/mt"
 )
 
@@ -34,3 +35,23 @@ type StaticObj struct {
 	Pos  [3]float32
 	Data string
 }
+
+type ErrInvalidNodeName struct {
+	Name string
+}
+
+func (e ErrInvalidNodeName) Error() string {
+	return fmt.Sprintf("invalid node \"%v\"", e.Name)
+}
+
+type ErrInvalidNodeId struct {
+	Id mt.Content
+}
+
+func (e ErrInvalidNodeId) Error() string {
+	return fmt.Sprintf("invalid node %v", e.Id)
+}
+
+func isSpecial(id mt.Content) bool {
+	return id >= 125 && id <= 127
+}
-- 
2.44.0