1 /* GemRB - Infinity Engine Emulator
2 * Copyright (C) 2003 The GemRB Project
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
8
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 */
18
19 #include "SAVImporter.h"
20
21 #include "Compressor.h"
22 #include "FileCache.h"
23 #include "Interface.h"
24 #include "PluginMgr.h"
25
26 using namespace GemRB;
27
SAVImporter()28 SAVImporter::SAVImporter()
29 {
30 }
31
~SAVImporter()32 SAVImporter::~SAVImporter()
33 {
34 }
35
DecompressSaveGame(DataStream * compressed)36 int SAVImporter::DecompressSaveGame(DataStream *compressed)
37 {
38 char Signature[8];
39 compressed->Read( Signature, 8 );
40 if (strncmp( Signature, "SAV V1.0", 8 ) ) {
41 return GEM_ERROR;
42 }
43 int All = compressed->Remains();
44 int Current;
45 int percent, last_percent = 20;
46 if (!All) return GEM_ERROR;
47 do {
48 ieDword fnlen, complen, declen;
49 compressed->ReadDword( &fnlen );
50 if (!fnlen) {
51 Log(ERROR, "SAVImporter", "Corrupt Save Detected");
52 return GEM_ERROR;
53 }
54 char* fname = ( char* ) malloc( fnlen );
55 compressed->Read( fname, fnlen );
56 strlwr(fname);
57 compressed->ReadDword( &declen );
58 compressed->ReadDword( &complen );
59 print("Decompressing %s", fname);
60 DataStream* cached = CacheCompressedStream(compressed, fname, complen, true);
61 free( fname );
62 if (!cached)
63 return GEM_ERROR;
64 delete cached;
65 Current = compressed->Remains();
66 //starting at 20% going up to 70%
67 percent = (20 + (All - Current) * 50 / All);
68 if (percent - last_percent > 5) {
69 core->LoadProgress(percent);
70 last_percent = percent;
71 }
72 }
73 while(Current);
74 return GEM_OK;
75 }
76
77 //this one can create .sav files only
CreateArchive(DataStream * compressed)78 int SAVImporter::CreateArchive(DataStream *compressed)
79 {
80 if (!compressed) {
81 return GEM_ERROR;
82 }
83 char Signature[8];
84
85 memcpy(Signature,"SAV V1.0",8);
86 compressed->Write(Signature, 8);
87
88 return GEM_OK;
89 }
90
AddToSaveGame(DataStream * str,DataStream * uncompressed)91 int SAVImporter::AddToSaveGame(DataStream *str, DataStream *uncompressed)
92 {
93 ieDword fnlen, declen, complen;
94
95 fnlen = strlen(uncompressed->filename)+1;
96 declen = uncompressed->Size();
97 str->WriteDword( &fnlen);
98 str->Write( uncompressed->filename, fnlen);
99 str->WriteDword( &declen);
100 //baaah, we dump output right in the stream, we get the compressed length
101 //only after the compressed data was written
102 complen = 0xcdcdcdcd; //placeholder
103 unsigned long Pos = str->GetPos(); //storing the stream position
104 str->WriteDword( &complen);
105
106 PluginHolder<Compressor> comp(PLUGIN_COMPRESSION_ZLIB);
107 comp->Compress( str, uncompressed );
108
109 //writing compressed length (calculated)
110 unsigned long Pos2 = str->GetPos();
111 complen = Pos2-Pos-sizeof(ieDword); //calculating the compressed stream size
112 str->Seek(Pos, GEM_STREAM_START); //going back to the placeholder
113 str->WriteDword( &complen); //updating size
114 str->Seek(Pos2, GEM_STREAM_START);//resuming work
115 return GEM_OK;
116 }
117
118 #include "plugindef.h"
119
120 GEMRB_PLUGIN(0xCDF132C, "SAV File Importer")
121 PLUGIN_CLASS(IE_SAV_CLASS_ID, SAVImporter)
122 END_PLUGIN()
123