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142 lines
3.7 KiB
C++
142 lines
3.7 KiB
C++
/* Residual - Virtual machine to run LucasArts' 3D adventure games
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*
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* Residual is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the AUTHORS
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* file distributed with this source distribution.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* This library 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 GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; 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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* $URL$
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* $Id$
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*
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*/
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#include "common/endian.h"
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#include "engine/lab.h"
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#include "engine/lua/lua.h"
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#include <algorithm>
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#include <cstring>
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bool Lab::open(const char *filename) {
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_labFileName = filename;
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close();
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_f = new Common::File();
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_f->open(filename);
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if (!_f->isOpen())
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return false;
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char header[16];
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if (_f->read(header, sizeof(header)) < sizeof(header)) {
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close();
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return false;
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}
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if (std::memcmp(header, "LABN", 4) != 0) {
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close();
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return false;
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}
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int num_entries = READ_LE_UINT32(header + 8);
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int string_table_size = READ_LE_UINT32(header + 12);
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char *string_table = new char[string_table_size];
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_f->seek(16 * (num_entries + 1), SEEK_SET);
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_f->read(string_table, string_table_size);
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_f->seek(16, SEEK_SET);
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char binary_entry[16];
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for (int i = 0; i < num_entries; i++) {
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_f->read(binary_entry, 16);
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int fname_offset = READ_LE_UINT32(binary_entry);
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int start = READ_LE_UINT32(binary_entry + 4);
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int size = READ_LE_UINT32(binary_entry + 8);
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std::string fname = string_table + fname_offset;
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std::transform(fname.begin(), fname.end(), fname.begin(), tolower);
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_fileMap.insert(std::make_pair(fname, LabEntry(start, size)));
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_fileMap.size();
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}
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delete []string_table;
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return true;
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}
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bool Lab::fileExists(const char *filename) const {
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return findFilename(filename) != _fileMap.end();
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}
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Block *Lab::getFileBlock(const char *filename) const {
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FileMapType::const_iterator i = findFilename(filename);
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if (i == _fileMap.end())
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return NULL;
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_f->seek(i->second.offset, SEEK_SET);
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char *data = new char[i->second.len];
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_f->read(data, i->second.len);
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return new Block(data, i->second.len);
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}
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LuaFile *Lab::openNewStreamLua(const char *filename) const {
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FileMapType::const_iterator i = findFilename(filename);
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if (i == _fileMap.end())
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return NULL;
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Common::File *file = new Common::File();
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file->open(_labFileName.c_str());
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file->seek(i->second.offset, SEEK_SET);
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LuaFile *filehandle = new LuaFile();
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filehandle->_in = file;
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return filehandle;
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}
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Common::File *Lab::openNewStreamFile(const char *filename) const {
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Common::File *file;
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FileMapType::const_iterator i = findFilename(filename);
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if (i == _fileMap.end())
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return NULL;
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file = new Common::File();
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file->open(_labFileName.c_str());
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file->seek(i->second.offset, SEEK_SET);
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return file;
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}
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int Lab::fileLength(const char *filename) const {
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FileMapType::const_iterator i = findFilename(filename);
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if (i == _fileMap.end())
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return -1;
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return i->second.len;
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}
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Lab::FileMapType::const_iterator Lab::findFilename(const char *filename) const {
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std::string s = filename;
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std::transform(s.begin(), s.end(), s.begin(), tolower);
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return _fileMap.find(s);
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}
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void Lab::close() {
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if (_f)
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delete _f;
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_f = NULL;
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_fileMap.clear();
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}
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