diff options
Diffstat (limited to 'engines/macventure/saveload.cpp')
-rw-r--r-- | engines/macventure/saveload.cpp | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/engines/macventure/saveload.cpp b/engines/macventure/saveload.cpp new file mode 100644 index 0000000000..a256713b24 --- /dev/null +++ b/engines/macventure/saveload.cpp @@ -0,0 +1,89 @@ +/* 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 "macventure/macventure.h" + +#include "common/error.h" +#include "common/savefile.h" +#include "engines/savestate.h" + +namespace MacVenture { + +#define MACVENTURE_SAVE_HEADER MKTAG('M', 'V', 'S', 'S') // (M)ac(V)enture (S)cummVM (S)ave (0x4d565353, uint32) +#define MACVENTURE_SAVE_VERSION 1 //1 BYTE +#define MACVENTURE_DESC_LENGTH 1 //1 BYTE for the description length + +SaveStateDescriptor loadMetaData(Common::SeekableReadStream *s, int slot) { + // Metadata is stored at the end of the file + // |DESCRIPTION | + // |HEADER |VERSION|DESCLEN| + s->seek(-(5 + MACVENTURE_DESC_LENGTH), SEEK_END); + uint32 sig = s->readUint32BE(); + byte version = s->readByte(); + + SaveStateDescriptor desc(-1, ""); // init to an invalid save slot + + if (sig != MACVENTURE_SAVE_HEADER || version > MACVENTURE_SAVE_VERSION) + return desc; + + // Save is valid, set its slot number + desc.setSaveSlot(slot); + + // Load the description + Common::String name; + // Depends on MACVENTURE_DESC_LENGTH + byte descSize = s->readByte(); + s->seek(-(5 + MACVENTURE_DESC_LENGTH + descSize), SEEK_END); + for (int i = 0; i < descSize; ++i) + name += s->readByte(); + desc.setDescription(name); + + return desc; +} + +void writeMetaData(Common::OutSaveFile *file, Common::String desc) { + if (desc.size() >= (1 << (MACVENTURE_DESC_LENGTH * 4))) { + desc.erase((1 << (MACVENTURE_DESC_LENGTH * 4)) - 1); + } + file->writeString(desc); + file->writeUint32BE(MACVENTURE_SAVE_HEADER); + file->writeByte(MACVENTURE_SAVE_VERSION); + file->writeByte(desc.size()); +} + +Common::Error MacVentureEngine::loadGameState(int slot) { + Common::InSaveFile *file = getSaveFileManager()->openForLoading("shadowgate.001"); + _world->loadGameFrom(file); + reset(); + return Common::kNoError; +} + +Common::Error MacVentureEngine::saveGameState(int slot, const Common::String &desc) { + Common::SaveFileManager *manager = getSaveFileManager(); + // HACK Get a real name! + Common::OutSaveFile *file = manager->openForSaving(desc); + _world->saveGameInto(file); + writeMetaData(file, desc); + delete file; +} + +} // End of namespace MacVenture |