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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.
*
*/
#include "groovie/saveload.h"
#include "groovie/groovie.h"
#include "common/system.h"
#include "common/substream.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 MAX_SAVES - 1;
}
bool SaveLoad::isSlotValid(int slot) {
return slot >= 0 && slot <= getMaximumSlot();
}
Common::String SaveLoad::getSlotSaveName(const Common::String &target, int slot) {
Common::String fileName = Common::String::format("%s.%03d", target.c_str(), slot);
return fileName;
}
SaveStateList SaveLoad::listValidSaves(const Common::String &target) {
SaveStateList list;
// Get the list of savefiles
Common::String pattern = Common::String::format("%s.0##", target.c_str());
Common::StringArray savefiles = g_system->getSavefileManager()->listSavefiles(pattern);
// Sort the list of filenames
sort(savefiles.begin(), savefiles.end());
// Fill the information for the existing savegames
Common::StringArray::iterator it = savefiles.begin();
while (it != savefiles.end()) {
const char *ext = strrchr(it->c_str(), '.');
if (!ext)
continue;
int slot = atoi(ext + 1);
if (!isSlotValid(slot))
continue;
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 nullptr;
}
// Open the savefile
Common::String savename = getSlotSaveName(target, slot);
Common::InSaveFile *savefile = g_system->getSavefileManager()->openForLoading(savename);
if (!savefile) {
return nullptr;
}
// 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->setSaveSlot(slot);
// 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->setDescription(description);
}
// Return a substream, skipping the metadata
Common::SeekableSubReadStream *sub = new Common::SeekableSubReadStream(savefile, metaDataSize, savefile->size(), DisposeAfterUse::YES);
// 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 nullptr;
}
// Open the savefile
Common::String savename = getSlotSaveName(target, slot);
Common::OutSaveFile *savefile = g_system->getSavefileManager()->openForSaving(savename);
if (!savefile) {
return nullptr;
}
// Write the savefile version
savefile->writeByte(SUPPORTED_SAVEFILE_VERSION);
return savefile;
}
} // End of Groovie namespace
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