mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-13 04:28:37 +00:00
146 lines
4.0 KiB
C++
146 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "hypno/libfile.h"
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#include "hypno/hypno.h"
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namespace Hypno {
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LibFile::LibFile() : Common::Archive() {
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_libfile = nullptr;
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_encrypted = true;
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}
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LibFile::~LibFile() {
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close();
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}
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bool LibFile::open(const Common::Path &prefix, const Common::Path &filename, bool encrypted) {
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close();
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_prefix = prefix;
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_encrypted = encrypted;
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_libfile = new Common::File();
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if (!_libfile->open(filename)) {
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warning("Failed to open %s", filename.toString(Common::Path::kNativeSeparator).c_str());
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return false;
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}
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uint32 offset = 0;
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while (offset < _libfile->size()) {
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byte b;
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uint32 size = 0;
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uint32 start = _libfile->size();
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FileEntry f;
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_libfile->seek(offset);
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debugC(1, kHypnoDebugParser, "parsing at offset %d with size %li", offset, long(_libfile->size()));
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while (true) {
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Common::String fname;
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for (uint32 i = 0; i < 12; i++) {
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b = _libfile->readByte();
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if (b != 0x96 && b != 0x0)
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fname += tolower(char(b));
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}
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if (!Common::isAlnum(*fname.c_str()))
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break;
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debugC(1, kHypnoDebugParser, "file: %s", fname.c_str());
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f.name = Common::Path(fname);
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f.start = start = _libfile->readUint32LE();
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f.size = size = _libfile->readUint32LE();
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if (size == 0)
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error("Trying to load an empty file");
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_libfile->readUint32LE(); // some field?
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debugC(1, kHypnoDebugParser, "start: %d, size: %d", f.start, f.size);
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_fileEntries.push_back(f);
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};
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offset = start + size;
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}
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return true;
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}
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const FileEntry *LibFile::getEntry(const Common::Path &path) const {
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for (Common::Array<FileEntry>::const_iterator it = _fileEntries.begin(); it != _fileEntries.end(); ++it) {
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if (((_prefix.join(it->name)).equalsIgnoreCase(path)) || it->name.equalsIgnoreCase(path))
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return it;
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}
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return nullptr;
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}
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void LibFile::close() {
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delete _libfile; _libfile = nullptr;
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_fileEntries.clear();
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}
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bool LibFile::hasFile(const Common::Path &path) const {
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return getEntry(path) != nullptr;
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}
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int LibFile::listMembers(Common::ArchiveMemberList &list) const {
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list.clear();
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for (Common::Array<FileEntry>::const_iterator it = _fileEntries.begin(); it != _fileEntries.end(); ++it)
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list.push_back(getMember(it->name));
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return list.size();
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}
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const Common::ArchiveMemberPtr LibFile::getMember(const Common::Path &path) const {
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return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(path, *this));
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}
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Common::SeekableReadStream *LibFile::createReadStreamForMember(const Common::Path &path) const {
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const FileEntry *entry = getEntry(path);
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if (!entry)
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return nullptr;
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byte *data = (byte *)malloc(entry->size);
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if (!data) {
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warning("Not enough memory to load archive entry %s", path.toString().c_str());
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return nullptr;
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}
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_libfile->seek(entry->start);
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_libfile->read(data, entry->size);
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Common::String name = path.baseName();
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name.toLowercase(); // just in case
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if (name.hasSuffix(".raw")) {
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for (uint32 i = 0; i < entry->size; i++) {
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data[i] = data[i] ^ 0xfe;
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}
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} else if (_encrypted) {
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for (uint32 i = 0; i < entry->size; i++) {
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if (data[i] != '\n')
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data[i] = data[i] ^ 0xfe;
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}
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}
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return new Common::MemoryReadStream(data, entry->size, DisposeAfterUse::YES);
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}
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} // namespace Hypno
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