Check number of bytes remaining before reading texture strings

addons/io_scene_swbf_msh/__init__.py

@@ -1,7 +1,7 @@
 bl_info = {
     'name': 'SWBF .msh Import-Export',
     'author': 'Will Snyder, SleepKiller',
-    "version": (1, 0, 0),
+    "version": (1, 2, 1),
     'blender': (2, 80, 0),
     'location': 'File > Import-Export',
     'description': 'Export as SWBF .msh file',

addons/io_scene_swbf_msh/chunked_file_reader.py

@@ -138,6 +138,9 @@ class Reader:
     def how_much_left(self, pos):
         return self.end_pos - pos
 
+    def bytes_remaining(self):
+        return self.end_pos - self.file.tell()
+
     def skip_until(self, header):
         while (self.could_have_child() and header not in self.peak_next_header()):
             self.skip_bytes(1)

addons/io_scene_swbf_msh/msh_scene_read.py

@@ -165,19 +165,23 @@ def _read_matd(matd: Reader) -> Material:
 
         elif next_header == "TX0D":
             with matd.read_child() as tx0d:
-                mat.texture0 = tx0d.read_string()
+                if tx0d.bytes_remaining() > 0:
+                    mat.texture0 = tx0d.read_string()
 
         elif next_header == "TX1D":
             with matd.read_child() as tx1d:
-                mat.texture1 = tx1d.read_string()
+                if tx1d.bytes_remaining() > 0:
+                    mat.texture1 = tx1d.read_string()
 
         elif next_header == "TX2D":
             with matd.read_child() as tx2d:
-                mat.texture2 = tx2d.read_string()
+                if tx2d.bytes_remaining() > 0:
+                    mat.texture2 = tx2d.read_string()
 
         elif next_header == "TX3D":
             with matd.read_child() as tx3d:
-                mat.texture3 = tx3d.read_string()
+                if tx3d.bytes_remaining() > 0:
+                    mat.texture3 = tx3d.read_string()
 
         else:
             matd.skip_bytes(1)