More map trailer work

internal/maps/maps.go

@@ -48,25 +48,40 @@ type Header struct {
 	// Need to investigate the rest of the header too
 }
 
-type Trailer struct {
-	Unknown1 uint16
-	Unknown2 uint16
-	Unknown3 uint32
-	Unknown4 uint32
-	Unknown5 uint32
+type TrailerHeader struct {
+	Discard1 [3]byte // No idea what this lot is
+	MaxWidth  uint32
+	MaxLength uint32
+	MinWidth  uint32
+	MinLength uint32
+
 	NumCharacters uint32
-	Padding1 uint32
-	Unknown6 uint16
-	Unknown7 uint16
-	Unknown8 uint32
+
+	Unknown1 uint32
+	Unknown2 uint16
+	Unknown3 uint16
+	Unknown4 uint32
 	NumThingies uint32
-	Padding2 [36]byte
+	Padding1 [20]byte
+}
+
+type TrailerTrailer struct {
+	Title    [255]byte
+	Briefing [2048]byte
+	Unknown1 [85]uint8 // Maybe? each contains either 0 or 1? Hard to say
 }
 
 type Character struct {
 	Unknown1 uint32
 }
 
+type Characters []Character
+
+// TODO. These are triggers/reactors/etc.
+type Thingy struct {}
+
+type Thingies []Thingy
+
 func (h Header) Width() int {
 	return int(h.MaxWidth - h.MinWidth)
 }
@@ -189,7 +204,14 @@ func (h Header) Check() []error {
 type GameMap struct {
 	Header
 	Cells
-	// TODO: parse this into sections
+	TrailerHeader
+	Characters
+	Thingies
+	TrailerTrailer
+
+	// TODO: parse this into sections. This is the text that comes from the
+	// .TXT file. Maybe we don't need it at all since it should be duplicated in
+	// the trailer.
 	Text string
 }
 
@@ -305,5 +327,37 @@ func loadMapFile(filename string) (*GameMap, error) {
 		return nil, fmt.Errorf("Error parsing cells for %s: %v", filename, err)
 	}
 
+	if err := binary.Read(zr, binary.LittleEndian, &out.TrailerHeader); err != nil {
+		return nil, fmt.Errorf("Error parsing trailer header for %s: %v", filename, err)
+	}
+
+	log.Printf("Trailer Header: %#+v", out.TrailerHeader)
+	/*
+	// TODO: until we know how large each character record should be, we can't read this lot
+
+	out.Characters = make(Characters, int(out.TrailerHeader.NumCharacters))
+	if err := binary.Read(zr, binary.LittleEndian, &out.Characters); err != nil {
+		return nil, fmt.Errorf("Error parsing characters for %s: %v", filename, err)
+	}
+
+	out.Thingies = make(Thingies, int(out.TrailerHeader.NumThingies))
+	if err := binary.Read(zr, binary.LittleEndian, &out.Thingies); err != nil {
+		return nil, fmt.Errorf("Error parsing thingies for %s: %v", filename, err)
+	}
+
+	if err := binary.Read(zr, binary.LittleEndian, &out.TrailerTrailer); err != nil {
+		return nil, fmt.Errorf("Error parsing trailer trailer for %s: %v", filename, err)
+	}
+	log.Printf("Trailer Trailer: %s", out.TrailerTrailer.String())
+*/
 	return &out, nil
 }
+
+func (t *TrailerTrailer) String() string {
+	return fmt.Sprintf(
+		"title=%q briefing=%q rest=%#+v",
+		strings.TrimRight(string(t.Title[:]), "\x00"),
+		strings.TrimRight(string(t.Briefing[:]), "\x00"),
+		t.Unknown1,
+	)
+}