162 lines
4 KiB
C++
162 lines
4 KiB
C++
/* Residual - A 3D game interpreter
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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 "common/file.h"
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#include "engines/grim/lab.h"
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#include "engines/grim/lua/lua.h"
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namespace Grim {
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static int sortCallback(const void *entry1, const void *entry2) {
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return strcasecmp(((Lab::LabEntry *)entry1)->filename, ((Lab::LabEntry *)entry2)->filename);
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}
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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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_f->read(header, sizeof(header));
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if (READ_BE_UINT32(header) != MKID_BE('LABN')) {
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close();
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return false;
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}
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_numEntries = 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 * (_numEntries + 1), SEEK_SET);
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_f->read(string_table, string_table_size);
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_entries = new LabEntry[_numEntries];
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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 < _numEntries; 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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Common::String fname = string_table + fname_offset;
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fname.toLowercase();
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_entries[i].offset = start;
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_entries[i].len = size;
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_entries[i].filename = new char[fname.size() + 1];
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strcpy(_entries[i].filename, fname.c_str());
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}
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qsort(_entries, _numEntries, sizeof(LabEntry), sortCallback);
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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) != NULL;
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}
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bool Lab::isOpen() const {
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return _f->isOpen();
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}
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Block *Lab::getFileBlock(const char *filename) const {
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LabEntry *i = findFilename(filename);
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if (!i)
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return NULL;
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_f->seek(i->offset, SEEK_SET);
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char *data = new char[i->len];
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_f->read(data, i->len);
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return new Block(data, i->len);
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}
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LuaFile *Lab::openNewStreamLua(const char *filename) const {
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LabEntry *i = findFilename(filename);
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if (!i)
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return NULL;
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Common::File *file = new Common::File();
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file->open(_labFileName);
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file->seek(i->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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LabEntry *i = findFilename(filename);
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if (!i)
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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->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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LabEntry *i = findFilename(filename);
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if (!i)
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return -1;
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return i->len;
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}
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Lab::LabEntry *Lab::findFilename(const char *filename) const {
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LabEntry key;
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Common::String s = filename;
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s.toLowercase();
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key.filename = (char *)s.c_str();
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return (Lab::LabEntry *)bsearch(&key, _entries, _numEntries, sizeof(LabEntry), sortCallback);
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}
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void Lab::close() {
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delete _f;
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_f = NULL;
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if (_entries)
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for (int i = 0; i < _numEntries; i++)
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delete[] _entries[i].filename;
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delete[] _entries;
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_entries = NULL;
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_numEntries = 0;
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}
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} // end of namespace Grim
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