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Diffstat (limited to 'engines/groovie/saveload.cpp')
| -rw-r--r-- | engines/groovie/saveload.cpp | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/engines/groovie/saveload.cpp b/engines/groovie/saveload.cpp new file mode 100644 index 0000000000..0d719ed599 --- /dev/null +++ b/engines/groovie/saveload.cpp @@ -0,0 +1,168 @@ +/* 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 "groovie/saveload.h" + +#include "common/system.h" + +#define SUPPORTED_SAVEFILE_VERSION 1 +// 0 - Just script variables, compatible with the original +// 1 - Added one byte with version number at the beginning + +namespace Groovie { + +int SaveLoad::getMaximumSlot() { + return 9; +} + +bool SaveLoad::isSlotValid(int slot) { + return slot >= 0 && slot <= getMaximumSlot(); +} + +Common::String SaveLoad::getSlotSaveName(const Common::String &target, int slot) { + return target + ".00" + ('0' + slot); +} + +SaveStateList SaveLoad::listValidSaves(const Common::String &target) { + SaveStateList list; + + // Get the list of savefiles + Common::String pattern = target + ".00?"; + Common::StringList savefiles = g_system->getSavefileManager()->listSavefiles(pattern.c_str()); + + // Sort the list of filenames + sort(savefiles.begin(), savefiles.end()); + + // Fill the information for the existing savegames + Common::StringList::iterator it = savefiles.begin(); + while (it != savefiles.end()) { + int slot = it->lastChar() - '0'; + SaveStateDescriptor descriptor; + Common::InSaveFile *file = SaveLoad::openForLoading(target, slot, &descriptor); + if (file) { + // It's a valid savefile, save the descriptor + delete file; + list.push_back(descriptor); + } + it++; + } + + return list; +} + +Common::InSaveFile *SaveLoad::openForLoading(const Common::String &target, int slot, SaveStateDescriptor *descriptor) { + // Validate the slot number + if (!isSlotValid(slot)) { + return NULL; + } + + // Open the savefile + Common::String savename = getSlotSaveName(target, slot); + Common::InSaveFile *savefile = g_system->getSavefileManager()->openForLoading(savename.c_str()); + if (!savefile) { + return NULL; + } + + // Read the savefile version + uint8 version; + if (savefile->size() == 1024) { + version = 0; + } else { + version = savefile->readByte(); + } + + // Verify we can read this version + if (version > SUPPORTED_SAVEFILE_VERSION) { + //TODO: show the error about unsupported savefile version + } + + // Save the current position as the start for the engine data + int metaDataSize = savefile->pos(); + + // Fill the SaveStateDescriptor if it was provided + if (descriptor) { + // Initialize the SaveStateDescriptor + descriptor->setVal("save_slot", Common::String('0' + slot)); + descriptor->setDeletableFlag(true); + descriptor->setWriteProtectedFlag(false); + + // TODO: Add extra information + //setSaveDate(int year, int month, int day) + //setSaveTime(int hour, int min) + //setPlayTime(int hours, int minutes) + + // Read the savegame description + Common::String description; + unsigned char c = 1; + for (int i = 0; (c != 0) && (i < 15); i++) { + c = savefile->readByte(); + switch (c) { + case 0: + break; + case 16: // @ + c = ' '; + break; + case 244: // $ + c = 0; + break; + default: + c += 0x30; + } + if (c != 0) { + description += c; + } + } + descriptor->setVal("description", description); + } + + // Return a substream, skipping the metadata + Common::SeekableSubReadStream *sub = new Common::SeekableSubReadStream(savefile, metaDataSize, savefile->size(), true); + + // Move to the beginning of the substream + sub->seek(0, SEEK_SET); + + return sub; +} + +Common::OutSaveFile *SaveLoad::openForSaving(const Common::String &target, int slot) { + // Validate the slot number + if (!isSlotValid(slot)) { + return NULL; + } + + // Open the savefile + Common::String savename = getSlotSaveName(target, slot); + Common::OutSaveFile *savefile = g_system->getSavefileManager()->openForSaving(savename.c_str()); + if (!savefile) { + return NULL; + } + + // Write the savefile version + savefile->writeByte(SUPPORTED_SAVEFILE_VERSION); + + return savefile; +} + +} // End of Groovie namespace |