1 files changed, 111 insertions, 0 deletions
diff --git a/engines/access/files.cpp b/engines/access/files.cpp
new file mode 100644
index 0000000000..7da7574df2
--- /dev/null
+++ b/engines/access/files.cpp
@@ -0,0 +1,111 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, 0xwhose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, 0xor (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, 0xwrite to the Free Software
+ * Foundation, 0xInc., 0x51 Franklin Street, 0xFifth Floor, 0xBoston, 0xMA 02110-1301, 0xUSA.
+ *
+ */
+
+#include "access/files.h"
+#include "access/resources.h"
+#include "access/access.h"
+
+namespace Access {
+
+FileManager::FileManager(AccessEngine *vm): _vm(vm) {
+	switch (vm->getGameID()) {
+	case GType_Amazon:
+		_filenames = &Amazon::FILENAMES[0];
+		break;
+	default:
+		error("Unknown game");
+	}
+
+	_fileNumber = -1;
+	_stream = nullptr;
+}
+
+FileManager::~FileManager() {
+	delete _stream;
+	_file.close();
+}
+
+void FileManager::loadFile(int fileNum, int subfile) {
+	setAppended(fileNum);
+	gotoAppended(subfile);
+
+	handleFile();
+}
+
+void FileManager::loadFile(const Common::String &filename) {
+	// Open up the file
+	_fileNumber = -1;
+	_file.close();
+	if (_file.open(filename))
+		error("Could not open file - %s", filename.c_str());
+
+	// Get a stream for the entire file
+	delete _stream;
+	_stream = _file.readStream(_file.size());
+
+	handleFile();
+}
+
+void FileManager::handleFile() {
+	char header[3];
+	_stream->read(&header[0], 3);
+
+	if (!strncmp(header, "BDE", 3))
+		// Decompress the resource
+		decompressFile();
+	else
+		// Not compressed, so move back to start of data
+		_stream->seek(0);
+}
+
+void FileManager::decompressFile() {
+	// TODO
+}
+
+void FileManager::setAppended(int fileNum) {
+	if (_fileNumber != fileNum) {
+		_fileNumber = fileNum;
+
+		_file.close();
+		if (!_file.open(_filenames[fileNum]))
+			error("Could not open file %s", _filenames[fileNum]);
+
+		// Read in the file index
+		_fileIndex.resize(50);
+		for (int i = 0; i < 50; ++i) {
+			_fileIndex[i]._offset = _file.readUint32LE();
+			_fileIndex[i]._nextOffset = _file.readUint32LE();
+		}
+	}
+}
+
+void FileManager::gotoAppended(int subfile) {
+	uint32 offset = _fileIndex[subfile]._offset;
+	uint32 size = _fileIndex[subfile]._nextOffset - offset;
+
+	_file.seek(offset);
+	delete _stream;
+	_stream = _file.readStream(size);
+}
+
+
+} // End of namespace Access