mirror of
https://github.com/libretro/scummvm.git
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132 lines
3.7 KiB
C++
132 lines
3.7 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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}
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LibFile::~LibFile() {
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}
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bool LibFile::open(const Common::String &prefix, const Common::String &filename, bool encrypted) {
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_prefix = prefix;
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Common::File libfile;
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if (!libfile.open(filename)) {
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warning("Failed to open %s", filename.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, libfile.size());
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while (true) {
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f.name = "";
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f.data.clear();
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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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f.name += tolower(char(b));
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}
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if (!Common::isAlnum(*f.name.c_str()))
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break;
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debugC(1, kHypnoDebugParser, "file: %s", f.name.c_str());
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start = libfile.readUint32LE();
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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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uint32 pos = libfile.pos();
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libfile.seek(start);
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for (uint32 i = 0; i < size; i++) {
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b = libfile.readByte();
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if (encrypted && b != '\n')
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b = b ^ 0xfe;
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f.data.push_back(b);
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//debugN("%c", b);
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}
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f.data.push_back(0x0);
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debugC(1, kHypnoDebugParser, "start: %d, size: %d", start, f.data.size());
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libfile.seek(pos);
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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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Common::String name = path.toString();
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for (Common::Array<FileEntry>::const_iterator it = _fileEntries.begin(); it != _fileEntries.end(); ++it) {
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if (((_prefix + it->name).equalsIgnoreCase(name)) || it->name.equalsIgnoreCase(name))
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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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_fileEntries.clear();
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}
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bool LibFile::hasFile(const Common::Path &path) const {
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Common::String name = path.toString();
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return getEntry(name) != 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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Common::String name = path.toString();
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return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
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}
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Common::SeekableReadStream *LibFile::createReadStreamForMember(const Common::Path &path) const {
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Common::String name = path.toString();
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const FileEntry *entry = getEntry(name);
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Common::MemoryReadStream *stream = nullptr;
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if (entry != nullptr)
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stream = new Common::MemoryReadStream(entry->data.data(), entry->data.size());
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return stream;
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}
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} // namespace Hypno
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