From 3e30014b9b2e257969c60b243ad715b0e64077a3 Mon Sep 17 00:00:00 2001
From: nkorslund <nkorslund@ea6a568a-9f4f-0410-981a-c910a81bb256>
Date: Thu, 17 Jul 2008 10:22:13 +0000
Subject: [PATCH] Testing savegame support

git-svn-id: https://openmw.svn.sourceforge.net/svnroot/openmw/trunk@28 ea6a568a-9f4f-0410-981a-c910a81bb256
---
 esm/esmmain.d    | 30 +++++++++++++++++++++++++++---
 esm/filereader.d | 37 ++++++++++++++++++++++++-------------
 openmw.d         |  7 +++++++
 3 files changed, 58 insertions(+), 16 deletions(-)

diff --git a/esm/esmmain.d b/esm/esmmain.d
index f333557a14..0ca83d808b 100644
--- a/esm/esmmain.d
+++ b/esm/esmmain.d
@@ -66,9 +66,8 @@ void loadTESFiles(char[][] files)
 	}
 
       // We have to loop through the lists and check for broken
-      // references at this point, if all forward references were
-      // loaded. There might be other end-of-file things to do
-      // also.
+      // references at this point, and if all forward references were
+      // loaded. There might be other end-of-file things to do also.
       endFiles();
     }
 
@@ -115,3 +114,28 @@ void loadTESFiles(char[][] files)
   // Finally, sort the hyperlink lists
   hyperlinks.sort();
 }
+
+// Load a TES savegame file (.ess). Currently VERY limited, only reads
+// the header.
+void importSavegame(char[] file)
+{
+  writefln("Loading savegame %s", file);
+  esFile.open(file, esmRegion);
+  scope(exit) esFile.close();
+
+  if(esFile.getFileType != FileType.Ess)
+    throw new TES3FileException(file ~ " is not a savegame");
+
+  with(esFile.saveData)
+    {
+      writefln("Floats:");
+      foreach(i, f; unknown)
+        writefln("  %s: %s", i, f);
+
+      writefln("Cell name: ", stripz(cell));
+
+      writefln("Strange value: ", unk2);
+      writefln("Player name: ", stripz(player));
+    }
+  writefln();
+}
diff --git a/esm/filereader.d b/esm/filereader.d
index 88301c1e73..b730a07788 100644
--- a/esm/filereader.d
+++ b/esm/filereader.d
@@ -140,12 +140,13 @@ struct TES3File
     char[] name;   // File name of an esm master for this file
     ulong size;	   // The master file's size in bytes (used for
                    // version control)
-  } 
+  }
 
   // List of esm masters for this file. For savegames this list also
   // contains all plugins.
   _mast masters[];
   
+
   // TES3.HEDR, file header struct
   align(1) struct HEDRstruct
   {
@@ -167,6 +168,19 @@ struct TES3File
 
  public:
 
+  // A struct found in the headers of savegame files. Contains quick
+  // information to get us going, like the cell name and the player
+  // name.
+  struct _saveData
+  {
+    float[6] unknown; // 24 bytes
+    char[64] cell; // Cell name
+    float unk2; // Unknown value
+    char[32] player; // Player name
+  }
+  static assert(_saveData.sizeof == 124);
+  _saveData saveData;
+
   // Get file information
   char[] getFilename() { return filename; }
   ulong getFileSize() { return file.size; }
@@ -244,16 +258,10 @@ struct TES3File
 
       debug writefln("Reading header");
 
+      // Do NOT .dup this filename, since it is referenced outside the
+      // GC's reach and might be deleted.
       this.filename = filename;
 
-      // Make a copy so the file name is not overwritten (not really needed?)
-      // this.filename = region.copy(filename);
-
-      // Oops, this was bad. The file name ends up in various
-      // TES3FileContext structs, allocated outside the GC's reach. A
-      // .dup'ed copy might be released and overwritten.
-      // this.filename = filename.dup;
-
       leftFile = file.size;
 
       // First things first
@@ -316,13 +324,16 @@ struct TES3File
 
       if(type == FileType.Savegame)
 	{
-          // What are these again? I don't remember.
-	  getSubNameIs("GMDT");
-	  skipHSubSize(124);
+          // Savegame-related data
+
+          // Cell name, player name and player position
+          readHNExact(&saveData, 124, "GMDT");
+
+          // Contains eg. 0xff0000, 0xff00, 0xff, 0x0, 0x20. No idea.
 	  getSubNameIs("SCRD");
 	  skipHSubSize(20);
 
-          // Screenshot, used for save games.
+          // Screenshot. Fits with 128x128x4 bytes
 	  getSubNameIs("SCRS");
 	  skipHSubSize(65536);
 	}
diff --git a/openmw.d b/openmw.d
index 10af5ab1b0..a14bb45230 100644
--- a/openmw.d
+++ b/openmw.d
@@ -101,6 +101,13 @@ void main(char[][] args)
     }
 
   initializeMemoryRegions();
+
+  /*
+  importSavegame("data/quiksave.ess");
+  importSavegame("data/Perm1hal0000.ess");
+  return;
+  */
+
   config.initialize(resetKeys);
   scope(exit) config.writeConfig();