From 3557c7c8eb8586b793a5f20cf311328e66f3d249 Mon Sep 17 00:00:00 2001
From: Ted John <ted@brambles.org>
Date: Sat, 7 May 2016 13:58:36 +0100
Subject: [PATCH] add S6 importer and chunk loading

---
 openrct2.vcxproj         |   2 +
 openrct2.vcxproj.filters |   2 +
 src/rct2/S6Importer.cpp  | 130 +++++++++++++++++++++++++++++++++++++++
 src/rct2/S6Importer.h    |  45 ++++++++++++++
 4 files changed, 179 insertions(+)
 create mode 100644 src/rct2/S6Importer.cpp
 create mode 100644 src/rct2/S6Importer.h

diff --git a/openrct2.vcxproj b/openrct2.vcxproj
index fc17260493..51cb591bc9 100644
--- a/openrct2.vcxproj
+++ b/openrct2.vcxproj
@@ -112,6 +112,7 @@
     <ClCompile Include="src\rct1\S4Importer.cpp" />
     <ClCompile Include="src\rct1\Tables.cpp" />
     <ClCompile Include="src\rct2.c" />
+    <ClCompile Include="src\rct2\S6Importer.cpp" />
     <ClCompile Include="src\ride\cable_lift.c" />
     <ClCompile Include="src\ride\coaster\air_powered_vertical_coaster.c" />
     <ClCompile Include="src\ride\coaster\bobsleigh_coaster.c" />
@@ -370,6 +371,7 @@
     <ClInclude Include="src\rct1\Tables.h" />
     <ClInclude Include="src\rct1\S4Importer.h" />
     <ClInclude Include="src\rct2.h" />
+    <ClInclude Include="src\rct2\S6Importer.h" />
     <ClInclude Include="src\ride\cable_lift.h" />
     <ClInclude Include="src\ride\ride.h" />
     <ClInclude Include="src\ride\ride_data.h" />
diff --git a/openrct2.vcxproj.filters b/openrct2.vcxproj.filters
index 8a5673ba04..c7fa8868ba 100644
--- a/openrct2.vcxproj.filters
+++ b/openrct2.vcxproj.filters
@@ -270,6 +270,7 @@
     <ClCompile Include="src\ride\gentle\space_rings.c" />
     <ClCompile Include="src\ride\gentle\spiral_slide.c" />
     <ClCompile Include="src\ride\vehicle_paint.c" />
+    <ClCompile Include="src\rct2\S6Importer.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="resources\resource.h" />
@@ -382,6 +383,7 @@
     <ClInclude Include="src\world\sprite.h" />
     <ClInclude Include="src\world\water.h" />
     <ClInclude Include="src\ride\vehicle_paint.h" />
+    <ClInclude Include="src\rct2\S6Importer.h" />
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="resources\OpenRCT2.rc" />
diff --git a/src/rct2/S6Importer.cpp b/src/rct2/S6Importer.cpp
new file mode 100644
index 0000000000..351bd33621
--- /dev/null
+++ b/src/rct2/S6Importer.cpp
@@ -0,0 +1,130 @@
+#pragma region Copyright (c) 2014-2016 OpenRCT2 Developers
+/*****************************************************************************
+ * OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
+ *
+ * OpenRCT2 is the work of many authors, a full list can be found in contributors.md
+ * For more information, visit https://github.com/OpenRCT2/OpenRCT2
+ *
+ * OpenRCT2 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * A full copy of the GNU General Public License can be found in licence.txt
+ *****************************************************************************/
+#pragma endregion
+
+#include "../core/Exception.hpp"
+#include "../core/IStream.hpp"
+#include "S6Importer.h"
+
+extern "C"
+{
+    #include "../util/sawyercoding.h"
+}
+
+S6Importer::S6Importer()
+{
+    memset(&_s6, 0, sizeof(_s6));
+}
+
+void S6Importer::LoadSavedGame(const utf8 * path)
+{
+    SDL_RWops * rw = SDL_RWFromFile(path, "rb");
+    if (rw == nullptr) {
+        throw IOException("Unable to open SV6.");
+    }
+
+    LoadSavedGame(rw);
+
+    SDL_RWclose(rw);
+
+    _s6Path = path;
+}
+
+void S6Importer::LoadScenario(const utf8 * path)
+{
+    SDL_RWops * rw = SDL_RWFromFile(path, "rb");
+    if (rw == nullptr) {
+        throw IOException("Unable to open SV6.");
+    }
+
+    LoadScenario(rw);
+
+    SDL_RWclose(rw);
+
+    _s6Path = path;
+}
+
+void S6Importer::LoadSavedGame(SDL_RWops *rw)
+{
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.header);
+
+    // Read packed objects
+    // TODO try to contain this more and not store objects until later
+    if (_s6.header.num_packed_objects > 0) {
+        int j = 0;
+        for (uint16 i = 0; i < _s6.header.num_packed_objects; i++)
+        {
+            j += object_load_packed(rw);
+        }
+        if (j > 0)
+        {
+            object_list_load();
+        }
+    }
+
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.objects);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.elapsed_months);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.map_elements);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.dword_010E63B8);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.guests_in_park);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.expenditure_table);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.last_guests_in_park);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.dword_01357BD0);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.park_rating);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.park_rating_history);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.active_research_types);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.balance_history);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.current_expenditure);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.weekly_profit_history);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.park_value);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.park_value_history);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.completed_company_value);
+}
+
+void S6Importer::LoadScenario(SDL_RWops *rw)
+{
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.header);
+
+    // Read packed objects
+    // TODO try to contain this more and not store objects until later
+    if (_s6.header.num_packed_objects > 0) {
+        int j = 0;
+        for (uint16 i = 0; i < _s6.header.num_packed_objects; i++)
+        {
+            j += object_load_packed(rw);
+        }
+        if (j > 0)
+        {
+            object_list_load();
+        }
+    }
+
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.objects);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.elapsed_months);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.map_elements);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.dword_010E63B8);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.guests_in_park);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.last_guests_in_park);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.park_rating);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.active_research_types);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.current_expenditure);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.park_value);
+    sawyercoding_read_chunk(rw, (uint8*)&_s6.completed_company_value);
+}
+
+void S6Importer::Import()
+{
+
+}
diff --git a/src/rct2/S6Importer.h b/src/rct2/S6Importer.h
new file mode 100644
index 0000000000..f0da502f82
--- /dev/null
+++ b/src/rct2/S6Importer.h
@@ -0,0 +1,45 @@
+#pragma region Copyright (c) 2014-2016 OpenRCT2 Developers
+/*****************************************************************************
+ * OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
+ *
+ * OpenRCT2 is the work of many authors, a full list can be found in contributors.md
+ * For more information, visit https://github.com/OpenRCT2/OpenRCT2
+ *
+ * OpenRCT2 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * A full copy of the GNU General Public License can be found in licence.txt
+ *****************************************************************************/
+#pragma endregion
+
+#pragma once
+
+#include "../common.h"
+#include "../core/List.hpp"
+
+extern "C"
+{
+    #include "../scenario.h"
+}
+
+/**
+ * Class to import RollerCoaster Tycoon 2 scenarios (*.SC6) and saved games (*.SV6).
+ */
+class S6Importer
+{
+public:
+    S6Importer();
+
+    void LoadSavedGame(const utf8 * path);
+    void LoadSavedGame(SDL_RWops *rw);
+    void LoadScenario(const utf8 * path);
+    void LoadScenario(SDL_RWops *rw);
+    void Import();
+
+private:
+    const utf8 * _s6Path;
+    rct_s6_data  _s6;
+    uint8        _gameVersion;
+};