1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/* 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: // @
// fall through intended
case 254: // . (generated when pressing space)
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
|
