NEVERHOOD: Add saveload skeleton (doesn't actually do anything yet)

3 files changed, 151 insertions, 2 deletions

diff --git a/engines/neverhood/module.mk b/engines/neverhood/module.mk
index 9069203e9b..b3deb6f339 100644
--- a/engines/neverhood/module.mk
+++ b/engines/neverhood/module.mk
@@ -41,6 +41,7 @@ MODULE_OBJS = \
 	palette.o \
 	resource.o \
 	resourceman.o \
+	saveload.o \
 	scene.o \
 	screen.o \
 	smackerscene.o \
diff --git a/engines/neverhood/neverhood.h b/engines/neverhood/neverhood.h
index ba6b9f7450..a66bdb3dd7 100644
--- a/engines/neverhood/neverhood.h
+++ b/engines/neverhood/neverhood.h
@@ -105,6 +105,9 @@ public:
 		uint32 version;
 		byte gameID;
 		uint32 flags;
+		uint32 saveDate;
+		uint32 saveTime;
+		uint32 playTime;
 		Graphics::Surface *thumbnail;
 	};
 
@@ -113,7 +116,6 @@ public:
 	bool canLoadGameStateCurrently() { return _isSaveAllowed; }
 	bool canSaveGameStateCurrently() { return _isSaveAllowed; }
 	
-#if 0 // Not used yet but let's keep it for later when it is	
 	Common::Error loadGameState(int slot);
 	Common::Error saveGameState(int slot, const Common::String &description);
 	void savegame(const char *filename, const char *description);
@@ -121,7 +123,6 @@ public:
 	const char *getSavegameFilename(int num);
 	static Common::String getSavegameFilename(const Common::String &target, int num);
 	static kReadSaveHeaderError readSaveHeader(Common::SeekableReadStream *in, bool loadThumbnail, SaveHeader &header);
-#endif
 
 	GameState& gameState() { return _gameState; }
 	GameModule *gameModule() { return _gameModule; }
diff --git a/engines/neverhood/saveload.cpp b/engines/neverhood/saveload.cpp
new file mode 100644
index 0000000000..96d7fdd9f2
--- /dev/null
+++ b/engines/neverhood/saveload.cpp
@@ -0,0 +1,147 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ *
+ */
+
+#include "common/savefile.h"
+
+#include "graphics/thumbnail.h"
+
+#include "neverhood/neverhood.h"
+
+namespace Neverhood {
+
+#define NEVERHOOD_SAVEGAME_VERSION 0
+
+NeverhoodEngine::kReadSaveHeaderError NeverhoodEngine::readSaveHeader(Common::SeekableReadStream *in, bool loadThumbnail, SaveHeader &header) {
+
+	header.version = in->readUint32LE();
+	if (header.version > NEVERHOOD_SAVEGAME_VERSION)
+		return kRSHEInvalidVersion;
+
+	byte descriptionLen = in->readByte();
+	header.description = "";
+	while (descriptionLen--)
+		header.description += (char)in->readByte();
+
+	if (loadThumbnail) {
+		header.thumbnail = Graphics::loadThumbnail(*in);
+	} else {
+		Graphics::skipThumbnail(*in);
+	}
+
+	// Not used yet, reserved for future usage
+	header.gameID = in->readByte();
+	header.flags = in->readUint32LE();
+
+	header.saveDate = in->readUint32LE();
+	header.saveTime = in->readUint32LE();
+	header.playTime = in->readUint32LE();
+
+	return ((in->eos() || in->err()) ? kRSHEIoError : kRSHENoError);
+}
+
+void NeverhoodEngine::savegame(const char *filename, const char *description) {
+
+	Common::OutSaveFile *out;
+	if (!(out = g_system->getSavefileManager()->openForSaving(filename))) {
+		warning("Can't create file '%s', game not saved", filename);
+		return;
+	}
+
+	TimeDate curTime;
+	g_system->getTimeAndDate(curTime);
+
+	// Header start
+	out->writeUint32LE(NEVERHOOD_SAVEGAME_VERSION);
+
+	byte descriptionLen = strlen(description);
+	out->writeByte(descriptionLen);
+	out->write(description, descriptionLen);
+	
+	Graphics::saveThumbnail(*out);
+
+	// Not used yet, reserved for future usage
+	out->writeByte(0);
+	out->writeUint32LE(0);
+	uint32 saveDate = ((curTime.tm_mday & 0xFF) << 24) | (((curTime.tm_mon + 1) & 0xFF) << 16) | ((curTime.tm_year + 1900) & 0xFFFF);
+	uint32 saveTime = ((curTime.tm_hour & 0xFF) << 16) | (((curTime.tm_min) & 0xFF) << 8) | ((curTime.tm_sec) & 0xFF);
+	uint32 playTime = g_engine->getTotalPlayTime() / 1000;
+	out->writeUint32LE(saveDate);
+	out->writeUint32LE(saveTime);
+	out->writeUint32LE(playTime);
+	// Header end
+
+	// TODO
+	
+	out->finalize();
+	delete out;
+}
+
+void NeverhoodEngine::loadgame(const char *filename) {
+	Common::InSaveFile *in;
+	if (!(in = g_system->getSavefileManager()->openForLoading(filename))) {
+		warning("Can't open file '%s', game not loaded", filename);
+		return;
+	}
+
+	SaveHeader header;
+
+	kReadSaveHeaderError errorCode = readSaveHeader(in, false, header);
+	
+	if (errorCode != kRSHENoError) {
+		warning("Error loading savegame '%s'", filename);
+		delete in;
+		return;
+	}
+	
+	g_engine->setTotalPlayTime(header.playTime * 1000);
+
+	// TODO
+	
+	delete in;
+
+}
+
+Common::Error NeverhoodEngine::loadGameState(int slot) {
+	const char *fileName = getSavegameFilename(slot);
+	loadgame(fileName);
+	return Common::kNoError;
+}
+
+Common::Error NeverhoodEngine::saveGameState(int slot, const Common::String &description) {
+	const char *fileName = getSavegameFilename(slot);
+	savegame(fileName, description.c_str());
+	return Common::kNoError;
+}
+
+const char *NeverhoodEngine::getSavegameFilename(int num) {
+	static Common::String filename;
+	filename = getSavegameFilename(_targetName, num);
+	return filename.c_str();
+}
+
+Common::String NeverhoodEngine::getSavegameFilename(const Common::String &target, int num) {
+	assert(num >= 0 && num <= 999);
+	return Common::String::format("%s.%03d", target.c_str(), num);
+}
+
+} // End of namespace Neverhood