Initial commit

engines/lastexpress/data/cvcrfile.h

@@ -0,0 +1,98 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose 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 3 of the License, or
+ * (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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef LASTEXPRESS_CVCRFILE_H
+#define LASTEXPRESS_CVCRFILE_H
+
+#include "lastexpress/lastexpress.h"
+#include "lastexpress/shared.h"
+
+namespace Common {
+class MemorySeekableReadWriteStream;
+class SeekableReadStream;
+}
+
+namespace LastExpress {
+
+#define CVCRMODE_WB   0
+#define CVCRMODE_RB   1
+#define CVCRMODE_RWB  2
+
+struct SVCRFileHeader {
+	int32 magicNumber;
+	int32 numVCRGames;
+	int32 nextWritePos;
+	int32 realWritePos;
+	int32 lastIsTemporary;
+	int32 brightness;
+	int32 volume;
+	int32 saveVersion;
+};
+
+struct SVCRSavePointHeader {
+	int32 magicNumber;
+	int32 type;
+	int32 time;
+	int32 size;
+	int32 partNumber;
+	int32 latestGameEvent;
+	int32 emptyField1;
+	int32 emptyField2;
+};
+
+class CVCRFile {
+public:
+	CVCRFile(LastExpressEngine *engine);
+	~CVCRFile();
+
+	bool open(const char *filename, int mode);
+	uint32 read(void *dstBuf, uint32 elementSize, uint32 elementCount, bool forceSimpleReadOnRle, bool checkSize);
+	uint32 write(void *srcBuf, uint32 elementSize, uint32 elementCount, bool forceSimpleReadOnRle);
+	uint32 readRLE(void *dstBuf, uint32 elementSize, uint32 elementCount);
+	uint32 writeRLE(void *srcBuf, uint32 elementSize, uint32 elementCount);
+	void writeToRLEBuffer(uint8 operation, uint8 flag);
+	uint32 flush();
+	uint32 seek(int32 offset, int mode);
+	void close();
+	int32 tell();
+
+	bool fileIsOpen() { return _virtualFileIsOpen; }
+
+private:
+	LastExpressEngine *_engine = nullptr;
+	Common::MemorySeekableReadWriteStream *_rwStream = nullptr;
+	Common::String _filename = "";
+	bool _virtualFileIsOpen = false;
+	uint32 _virtualFileSize = 0;
+	uint32 _rwStreamSize = 0;
+	uint8 _rleDstBuf[256];
+	int32 _rleBufferPosition = -1;
+	uint8 _rleByte = 0;
+	uint8 _rleCount = 0;
+	int32 _rleMode = 0;
+	int32 _bytesProcessed = 0;
+	int32 _rleStatus = 0;
+	int32 _fileMode = 0;
+};
+
+} // End of namespace LastExpress
+
+#endif // LASTEXPRESS_CVCRFILE_H