mirror of
https://github.com/libretro/scummvm.git
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112 lines
3.1 KiB
C++
112 lines
3.1 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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* 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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* 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 "common/dcl.h"
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#include "neverhood/blbarchive.h"
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namespace Neverhood {
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BlbArchive::BlbArchive() : _extData(NULL) {
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}
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BlbArchive::~BlbArchive() {
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delete[] _extData;
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}
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void BlbArchive::open(const Common::String &filename) {
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BlbHeader header;
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_entries.clear();
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if (!_fd.open(filename))
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error("BlbArchive::open() Could not open %s", filename.c_str());
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header.id1 = _fd.readUint32LE();
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header.id2 = _fd.readUint16LE();
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header.extDataSize = _fd.readUint16LE();
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header.fileSize = _fd.readUint32LE();
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header.fileCount = _fd.readUint32LE();
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if (header.id1 != 0x2004940 || header.id2 != 7 || header.fileSize != _fd.size())
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error("BlbArchive::open() %s seems to be corrupt", filename.c_str());
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debug(2, "fileCount = %d", header.fileCount);
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_entries.reserve(header.fileCount);
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// Load file hashes
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for (uint i = 0; i < header.fileCount; i++) {
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BlbArchiveEntry entry;
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entry.fileHash = _fd.readUint32LE();
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_entries.push_back(entry);
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}
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// Load file records
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for (uint i = 0; i < header.fileCount; i++) {
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BlbArchiveEntry &entry = _entries[i];
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entry.type = _fd.readByte();
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entry.comprType = _fd.readByte();
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entry.extDataOfs = _fd.readUint16LE();
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entry.timeStamp = _fd.readUint32LE();
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entry.offset = _fd.readUint32LE();
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entry.diskSize = _fd.readUint32LE();
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entry.size = _fd.readUint32LE();
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debug(2, "%08X: %03d, %02X, %04X, %08X, %08X, %08X, %08X",
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entry.fileHash, entry.type, entry.comprType, entry.extDataOfs, entry.timeStamp,
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entry.offset, entry.diskSize, entry.size);
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}
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// Load ext data
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if (header.extDataSize > 0) {
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_extData = new byte[header.extDataSize];
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_fd.read(_extData, header.extDataSize);
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}
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}
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void BlbArchive::load(uint index, byte *buffer, uint32 size) {
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BlbArchiveEntry &entry = _entries[index];
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_fd.seek(entry.offset);
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switch (entry.comprType) {
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case 1: // Uncompressed
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if (size == 0)
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size = entry.diskSize;
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_fd.read(buffer, size);
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break;
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case 3: // DCL-compressed
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Common::decompressDCL(&_fd, buffer, entry.diskSize, entry.size);
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break;
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default:
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;
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}
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}
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byte *BlbArchive::getEntryExtData(uint index) {
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BlbArchiveEntry &entry = _entries[index];
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return _extData && entry.extDataOfs != 0 ? &_extData[entry.extDataOfs - 1] : NULL;
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}
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} // End of namespace Neverhood
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