1 files changed, 278 insertions, 0 deletions
diff --git a/engines/kyra/gui/saveload.cpp b/engines/kyra/gui/saveload.cpp
new file mode 100644
index 0000000000..b59f950c94
--- /dev/null
+++ b/engines/kyra/gui/saveload.cpp
@@ -0,0 +1,278 @@
+/* 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 "kyra/kyra_v1.h"
+#include "kyra/engine/util.h"
+
+#include "common/savefile.h"
+#include "common/system.h"
+
+#include "graphics/thumbnail.h"
+#include "graphics/surface.h"
+
+#define CURRENT_SAVE_VERSION 18
+
+#define GF_FLOPPY  (1 <<  0)
+#define GF_TALKIE  (1 <<  1)
+#define GF_FMTOWNS (1 <<  2)
+
+namespace Kyra {
+
+WARN_UNUSED_RESULT KyraEngine_v1::ReadSaveHeaderError KyraEngine_v1::readSaveHeader(Common::SeekableReadStream *in, SaveHeader &header, bool skipThumbnail) {
+	uint32 type = in->readUint32BE();
+	header.originalSave = false;
+	header.oldHeader = false;
+	header.flags = 0;
+
+	if (type == MKTAG('K', 'Y', 'R', 'A') || type == MKTAG('A', 'R', 'Y', 'K')) { // old Kyra1 header ID
+		header.gameID = GI_KYRA1;
+		header.oldHeader = true;
+	} else if (type == MKTAG('H', 'O', 'F', 'S')) { // old Kyra2 header ID
+		header.gameID = GI_KYRA2;
+		header.oldHeader = true;
+	} else if (type == MKTAG('W', 'W', 'S', 'V')) {
+		header.gameID = in->readByte();
+	} else {
+		// try checking for original save header
+		const int descriptionSize[3] = { 30, 80, 60 };
+		char descriptionBuffer[81];
+
+		bool saveOk = false;
+
+		for (uint i = 0; i < ARRAYSIZE(descriptionSize) && !saveOk; ++i) {
+			if (in->size() < descriptionSize[i] + 6)
+				continue;
+
+			in->seek(0, SEEK_SET);
+			in->read(descriptionBuffer, descriptionSize[i]);
+			descriptionBuffer[descriptionSize[i]] = 0;
+
+			Util::convertDOSToISO(descriptionBuffer);
+
+			type = in->readUint32BE();
+			header.version = in->readUint16LE();
+			if (type == MKTAG('M', 'B', 'L', '3') && header.version == 100) {
+				saveOk = true;
+				header.description = descriptionBuffer;
+				header.gameID = GI_KYRA2;
+				break;
+			} else if (type == MKTAG('M', 'B', 'L', '4') && header.version == 102) {
+				saveOk = true;
+				header.description = descriptionBuffer;
+				header.gameID = GI_KYRA3;
+				break;
+			} else if (type == MKTAG('C','D','0','4')) {
+				header.version = in->readUint32BE();
+				// We don't check the minor version, since the original doesn't do that either and it isn't required.
+				if (header.version != MKTAG(' ','C','D','1'))
+					continue;
+				saveOk = true;
+				header.description = descriptionBuffer;
+				header.gameID = GI_LOL;
+				in->seek(6, SEEK_CUR);
+				break;
+			}
+		}
+
+		if (saveOk) {
+			header.originalSave = true;
+			header.description = descriptionBuffer;
+			return kRSHENoError;
+		} else {
+			return kRSHEInvalidType;
+		}
+	}
+
+	header.version = in->readUint32BE();
+	if (header.version > CURRENT_SAVE_VERSION || (header.oldHeader && header.version > 8) || (type == MKTAG('A', 'R', 'Y', 'K') && header.version > 3))
+		return kRSHEInvalidVersion;
+
+	// Versions prior to 9 are using a fixed length description field
+	if (header.version <= 8) {
+		char buffer[31];
+		in->read(buffer, 31);
+		// WORKAROUND: Old savegames could contain a missing termination 0 at the
+		// end so we manually add it.
+		buffer[30] = 0;
+		header.description = buffer;
+	} else {
+		header.description = "";
+		for (char c = 0; (c = in->readByte()) != 0;)
+			header.description += c;
+	}
+
+	if (header.version >= 2)
+		header.flags = in->readUint32BE();
+
+	if (header.version >= 14) {
+		if (!Graphics::loadThumbnail(*in, header.thumbnail, skipThumbnail)) {
+			if (!skipThumbnail)
+				return kRSHEIoError;
+		}
+	} else {
+		header.thumbnail = 0;
+	}
+
+	return ((in->err() || in->eos()) ? kRSHEIoError : kRSHENoError);
+}
+
+Common::SeekableReadStream *KyraEngine_v1::openSaveForReading(const char *filename, SaveHeader &header, bool checkID) {
+	Common::SeekableReadStream *in = 0;
+	if (!(in = _saveFileMan->openForLoading(filename)))
+		return 0;
+
+	ReadSaveHeaderError errorCode = KyraEngine_v1::readSaveHeader(in, header);
+	if (errorCode != kRSHENoError) {
+		if (errorCode == kRSHEInvalidType)
+			warning("No ScummVM Kyra engine savefile header");
+		else if (errorCode == kRSHEInvalidVersion)
+			warning("Savegame is not the right version (%u, '%s')", header.version, header.oldHeader ? "true" : "false");
+		else if (errorCode == kRSHEIoError)
+			warning("Load failed '%s'", filename);
+
+		delete in;
+		return 0;
+	}
+
+	if (!header.originalSave) {
+		if (!header.oldHeader) {
+			if (header.gameID != _flags.gameID && checkID) {
+				warning("Trying to load saved game from other game (saved game: %u, running game: %u)", header.gameID, _flags.gameID);
+				delete in;
+				return 0;
+			}
+		}
+
+		if (header.version < 2) {
+			warning("Make sure your savefile was from this version! (too old savefile version to detect that)");
+		} else {
+			if ((header.flags & GF_FLOPPY) && (_flags.isTalkie || _flags.platform == Common::kPlatformFMTowns || _flags.platform == Common::kPlatformPC98)) {
+				warning("Can not load DOS Floppy savefile for this (non DOS Floppy) gameversion");
+				delete in;
+				return 0;
+			} else if ((header.flags & GF_TALKIE) && !(_flags.isTalkie)) {
+				warning("Can not load DOS CD-ROM savefile for this (non DOS CD-ROM) gameversion");
+				delete in;
+				return 0;
+			} else if ((header.flags & GF_FMTOWNS) && !(_flags.platform == Common::kPlatformFMTowns || _flags.platform == Common::kPlatformPC98)) {
+				warning("Can not load FM-TOWNS/PC98 savefile for this (non FM-TOWNS/PC98) gameversion");
+				delete in;
+				return 0;
+			}
+		}
+	}
+
+	return in;
+}
+
+Common::OutSaveFile *KyraEngine_v1::openSaveForWriting(const char *filename, const char *saveName, const Graphics::Surface *thumbnail) const {
+	if (shouldQuit())
+		return 0;
+
+	Common::WriteStream *out = 0;
+	if (!(out = _saveFileMan->openForSaving(filename))) {
+		warning("Can't create file '%s', game not saved", filename);
+		return 0;
+	}
+
+	// Savegame version
+	out->writeUint32BE(MKTAG('W', 'W', 'S', 'V'));
+	out->writeByte(_flags.gameID);
+	out->writeUint32BE(CURRENT_SAVE_VERSION);
+	out->write(saveName, strlen(saveName) + 1);
+	if (_flags.isTalkie)
+		out->writeUint32BE(GF_TALKIE);
+	else if (_flags.platform == Common::kPlatformFMTowns || _flags.platform == Common::kPlatformPC98)
+		out->writeUint32BE(GF_FMTOWNS);
+	else
+		out->writeUint32BE(GF_FLOPPY);
+
+	if (out->err()) {
+		warning("Can't write file '%s'. (Disk full?)", filename);
+		delete out;
+		return 0;
+	}
+
+	Graphics::Surface *genThumbnail = 0;
+	if (!thumbnail)
+		thumbnail = genThumbnail = generateSaveThumbnail();
+
+	if (thumbnail)
+		Graphics::saveThumbnail(*out, *thumbnail);
+	else
+		Graphics::saveThumbnail(*out);
+
+	if (genThumbnail) {
+		genThumbnail->free();
+		delete genThumbnail;
+	}
+
+	return new Common::OutSaveFile(out);
+}
+
+const char *KyraEngine_v1::getSavegameFilename(int num) {
+	_savegameFilename = getSavegameFilename(_targetName, num);
+	return _savegameFilename.c_str();
+}
+
+Common::String KyraEngine_v1::getSavegameFilename(const Common::String &target, int num) {
+	assert(num >= 0 && num <= 999);
+	return target + Common::String::format(".%03d", num);
+}
+
+bool KyraEngine_v1::saveFileLoadable(int slot) {
+	if (slot < 0 || slot > 999)
+		return false;
+
+	SaveHeader header;
+	Common::SeekableReadStream *in = openSaveForReading(getSavegameFilename(slot), header);
+
+	if (in) {
+		delete in;
+		return true;
+	}
+
+	return false;
+}
+
+void KyraEngine_v1::checkAutosave() {
+	if (shouldPerformAutoSave(_lastAutosave)) {
+		saveGameStateIntern(999, "Autosave", 0);
+		_lastAutosave = _system->getMillis();
+	}
+}
+
+void KyraEngine_v1::loadGameStateCheck(int slot) {
+	// FIXME: Instead of throwing away the error returned by
+	// loadGameState, we should use it / augment it.
+	if (loadGameState(slot).getCode() != Common::kNoError) {
+		const char *filename = getSavegameFilename(slot);
+		Common::String errorMessage = "Could not load savegame: '";
+		errorMessage += filename;
+		errorMessage += "'";
+
+		GUIErrorMessage(errorMessage);
+		error("%s", errorMessage.c_str());
+	}
+}
+
+} // End of namespace Kyra