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/* 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.
*
* $URL$
* $Id$
*
*/
#include "common/endian.h"
#include "common/savefile.h"
#include "common/system.h"
#include "kyra/kyra_v1.h"
#define CURRENT_SAVE_VERSION 13
#define GF_FLOPPY (1 << 0)
#define GF_TALKIE (1 << 1)
#define GF_FMTOWNS (1 << 2)
namespace Kyra {
KyraEngine_v1::kReadSaveHeaderError KyraEngine_v1::readSaveHeader(Common::InSaveFile *in, SaveHeader &header) {
uint32 type = in->readUint32BE();
header.originalSave = false;
header.oldHeader = false;
header.flags = 0;
if (type == MKID_BE('KYRA') || type == MKID_BE('ARYK')) { // old Kyra1 header ID
header.gameID = GI_KYRA1;
header.oldHeader = true;
} else if (type == MKID_BE('HOFS')) { // old Kyra2 header ID
header.gameID = GI_KYRA2;
header.oldHeader = true;
} else if (type == MKID_BE('WWSV')) {
header.gameID = in->readByte();
} else {
// try checking for original save header
const int descriptionSize[2] = { 30, 80 };
char descriptionBuffer[81];
bool saveOk = false;
for (uint i = 0; i < ARRAYSIZE(descriptionSize) && !saveOk; ++i) {
in->seek(0, SEEK_SET);
in->read(descriptionBuffer, descriptionSize[i]);
descriptionBuffer[descriptionSize[i]] = 0;
type = in->readUint32BE();
header.version = in->readUint16LE();
if (type == MKID_BE('MBL3') && header.version == 100) {
saveOk = true;
header.description = descriptionBuffer;
header.gameID = GI_KYRA2;
break;
} else if (type == MKID_BE('MBL4') && header.version == 102) {
saveOk = true;
header.description = descriptionBuffer;
header.gameID = GI_KYRA3;
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 == MKID_BE('ARYK') && 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);
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();
return (in->ioFailed() ? kRSHEIoError : kRSHENoError);
}
Common::InSaveFile *KyraEngine_v1::openSaveForReading(const char *filename, SaveHeader &header) {
debugC(9, kDebugLevelMain, "KyraEngine_v1::openSaveForReading('%s', -)", filename);
Common::InSaveFile *in = 0;
if (!(in = _saveFileMan->openForLoading(filename)))
return 0;
kReadSaveHeaderError 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) {
warning("Trying to load game state from other game (save 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 {
debugC(9, kDebugLevelMain, "KyraEngine_v1::openSaveForWriting('%s', '%s')", filename, saveName);
if (_quitFlag)
return 0;
Common::OutSaveFile *out = 0;
if (!(out = _saveFileMan->openForSaving(filename))) {
warning("Can't create file '%s', game not saved", filename);
return 0;
}
// Savegame version
out->writeUint32BE(MKID_BE('WWSV'));
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->ioFailed()) {
warning("Can't write file '%s'. (Disk full?)", filename);
delete out;
return 0;
}
return out;
}
const char *KyraEngine_v1::getSavegameFilename(int num) {
static Common::String filename;
assert(num >= 0 && num <= 999);
char extension[5];
sprintf(extension, "%.3d", num);
filename = _targetName + "." + extension;
return filename.c_str();
}
bool KyraEngine_v1::saveFileLoadable(int slot) {
if (slot < 0 || slot > 999)
return false;
SaveHeader header;
Common::InSaveFile *in = openSaveForReading(getSavegameFilename(slot), header);
if (in) {
delete in;
return true;
}
return false;
}
} // end of namespace Kyra
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