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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 "fullpipe/fullpipe.h"
#include "common/archive.h"
#include "common/file.h"
#include "common/hash-str.h"
#include "common/memstream.h"
#include "common/bufferedstream.h"
#include "common/textconsole.h"
#include "fullpipe/ngiarchive.h"
namespace Fullpipe {
#define NGI_FILENAME_MAX 13
struct NgiHeader {
int32 pos;
int32 extVal;
int32 flags;
int32 size;
char filename[NGI_FILENAME_MAX];
};
typedef Common::HashMap<Common::String, NgiHeader*, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> NgiHeadersMap;
class NGIArchive : public Common::Archive {
NgiHeadersMap _headers;
Common::String _ngiFilename;
public:
NGIArchive(const Common::String &name);
virtual ~NGIArchive();
// Archive implementation
virtual bool hasFile(const Common::String &name) const;
virtual int listMembers(Common::ArchiveMemberList &list) const;
virtual const Common::ArchiveMemberPtr getMember(const Common::String &name) const;
virtual Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const;
};
NGIArchive::NGIArchive(const Common::String &filename) : _ngiFilename(filename) {
Common::File ngiFile;
if (!ngiFile.open(_ngiFilename)) {
warning("NGIArchive::NGIArchive(): Could not find the archive file");
return;
}
ngiFile.seek(4, SEEK_SET);
unsigned int count = ngiFile.readUint16LE(); // How many entries?
ngiFile.seek(20, SEEK_SET);
unsigned int key = ngiFile.readUint16LE();
byte key1, key2;
key1 = key & 0xff;
key2 = (key >> 8) & 0xff;
int fatSize = count * 32;
ngiFile.seek(32, SEEK_SET);
byte *fat = (byte *)calloc(fatSize, 1);
ngiFile.read(fat, fatSize);
for (int i = 0; i < fatSize; i++) {
key1 = (key1 << 1) ^ key2;
key2 = (key2 >> 1) ^ key1;
fat[i] ^= key1;
}
NgiHeader header;
NgiHeader *head;
for (uint i = 0; i < count; i++) {
memcpy(header.filename, &fat[i * 32], 12);
header.filename[12] = 0;
header.flags = READ_LE_UINT32(&fat[i * 32 + 16]);
header.extVal = READ_LE_UINT32(&fat[i * 32 + 20]);
header.pos = READ_LE_UINT32(&fat[i * 32 + 24]);
header.size = READ_LE_UINT32(&fat[i * 32 + 28]);
if (header.flags & 0x1e0) {
warning("File has flags: %.8x\n", header.flags & 0x1e0);
}
head = new NgiHeader(header);
_headers[header.filename] = head;
}
free(fat);
debug(0, "NGIArchive::NGIArchive(%s): Located %d files", filename.c_str(), _headers.size());
}
NGIArchive::~NGIArchive() {
debug(0, "NGIArchive Destructor Called");
NgiHeadersMap::iterator it = _headers.begin();
for ( ; it != _headers.end(); ++it) {
delete it->_value;
}
}
bool NGIArchive::hasFile(const Common::String &name) const {
return _headers.contains(name);
}
int NGIArchive::listMembers(Common::ArchiveMemberList &list) const {
int matches = 0;
NgiHeadersMap::const_iterator it = _headers.begin();
for ( ; it != _headers.end(); ++it) {
list.push_back(Common::ArchiveMemberList::value_type(new Common::GenericArchiveMember(it->_value->filename, this)));
matches++;
}
return matches;
}
const Common::ArchiveMemberPtr NGIArchive::getMember(const Common::String &name) const {
if (!hasFile(name))
return Common::ArchiveMemberPtr();
return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
}
Common::SeekableReadStream *NGIArchive::createReadStreamForMember(const Common::String &name) const {
if (!_headers.contains(name)) {
return 0;
}
NgiHeader *hdr = _headers[name];
Common::File archiveFile;
archiveFile.open(_ngiFilename);
archiveFile.seek(hdr->pos, SEEK_SET);
// TODO: It would be good if ArjFile could decompress files in a streaming
// mode, so it would not need to pre-allocate the entire output.
byte *data = (byte *)malloc(hdr->size);
assert(data);
int32 len = archiveFile.read(data, hdr->size);
assert(len == hdr->size);
return new Common::MemoryReadStream(data, hdr->size, DisposeAfterUse::YES);
}
Common::Archive *makeNGIArchive(const Common::String &name) {
return new NGIArchive(name);
}
} // End of namespace Fullpipe
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