mirror of
https://github.com/libretro/scummvm.git
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157 lines
4.0 KiB
C++
157 lines
4.0 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "fullpipe/fullpipe.h"
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#include "common/archive.h"
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#include "common/file.h"
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#include "common/hash-str.h"
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#include "common/memstream.h"
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#include "common/bufferedstream.h"
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#include "common/textconsole.h"
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#include "fullpipe/ngiarchive.h"
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namespace Fullpipe {
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NGIArchive::NGIArchive(const Common::String &filename) : _ngiFilename(filename) {
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Common::File ngiFile;
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if (!ngiFile.open(_ngiFilename)) {
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warning("NGIArchive::NGIArchive(): Could not find the archive file");
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return;
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}
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ngiFile.seek(4, SEEK_SET);
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unsigned int count = ngiFile.readUint16LE(); // How many entries?
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ngiFile.seek(20, SEEK_SET);
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unsigned int key = ngiFile.readUint16LE();
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byte key1, key2;
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key1 = key & 0xff;
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key2 = (key >> 8) & 0xff;
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int fatSize = count * 32;
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ngiFile.seek(32, SEEK_SET);
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byte *fat = (byte *)calloc(fatSize, 1);
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ngiFile.read(fat, fatSize);
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for (int i = 0; i < fatSize; i++) {
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key1 = (key1 << 1) ^ key2;
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key2 = (key2 >> 1) ^ key1;
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fat[i] ^= key1;
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}
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NgiHeader header;
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NgiHeader *head;
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for (uint i = 0; i < count; i++) {
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memcpy(header.filename, &fat[i * 32], 12);
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header.filename[12] = 0;
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header.flags = READ_LE_UINT32(&fat[i * 32 + 16]);
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header.extVal = READ_LE_UINT32(&fat[i * 32 + 20]);
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header.pos = READ_LE_UINT32(&fat[i * 32 + 24]);
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header.size = READ_LE_UINT32(&fat[i * 32 + 28]);
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if (header.flags & 0x1e0) {
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warning("File has flags: %.8x\n", header.flags & 0x1e0);
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}
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head = new NgiHeader(header);
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_headers[header.filename] = head;
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}
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free(fat);
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g_fullpipe->_currArchive = this;
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debug(0, "NGIArchive::NGIArchive(%s): Located %d files", filename.c_str(), _headers.size());
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}
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NGIArchive::~NGIArchive() {
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debug(0, "NGIArchive Destructor Called");
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NgiHeadersMap::iterator it = _headers.begin();
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for ( ; it != _headers.end(); ++it) {
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delete it->_value;
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}
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g_fullpipe->_currArchive = 0;
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}
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bool NGIArchive::hasFile(const Common::String &name) const {
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return _headers.contains(name);
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}
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int NGIArchive::listMembers(Common::ArchiveMemberList &list) const {
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int matches = 0;
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NgiHeadersMap::const_iterator it = _headers.begin();
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for ( ; it != _headers.end(); ++it) {
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list.push_back(Common::ArchiveMemberList::value_type(new Common::GenericArchiveMember(it->_value->filename, this)));
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matches++;
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}
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return matches;
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}
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const Common::ArchiveMemberPtr NGIArchive::getMember(const Common::String &name) const {
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if (!hasFile(name))
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return Common::ArchiveMemberPtr();
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return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
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}
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Common::SeekableReadStream *NGIArchive::createReadStreamForMember(const Common::String &name) const {
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if (!_headers.contains(name)) {
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return 0;
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}
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NgiHeader *hdr = _headers[name];
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Common::File archiveFile;
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archiveFile.open(_ngiFilename);
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archiveFile.seek(hdr->pos, SEEK_SET);
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byte *data = (byte *)malloc(hdr->size);
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assert(data);
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int32 len = archiveFile.read(data, hdr->size);
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assert(len == hdr->size);
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return new Common::MemoryReadStream(data, hdr->size, DisposeAfterUse::YES);
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}
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Common::Archive *makeNGIArchive(const Common::String &name) {
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return new NGIArchive(name);
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}
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} // End of namespace Fullpipe
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