Merge branch 'cge'

This adds the CGE engine for the game Soltys.

It is based on pull request https://github.com/scummvm/scummvm/pull/81 .

1 files changed, 168 insertions, 0 deletions

diff --git a/engines/cge/fileio.h b/engines/cge/fileio.h
new file mode 100644
index 0000000000..1f0756a276
--- /dev/null
+++ b/engines/cge/fileio.h
@@ -0,0 +1,168 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+/*
+ * This code is based on original Soltys source code
+ * Copyright (c) 1994-1995 Janus B. Wisniewski and L.K. Avalon
+ */
+
+#ifndef CGE_FILEIO_H
+#define CGE_FILEIO_H
+
+#include "cge/general.h"
+#include "common/stream.h"
+
+namespace CGE {
+
+#define kBtSize       1024
+#define kBtKeySize    13
+#define kBtLevel      2
+#define kBtInnerCount ((kBtSize - 4 /*sizeof(Hea) */) / (kBtKeySize + 2 /*sizeof(Inner) */))
+#define kBtLeafCount  ((kBtSize - 4 /*sizeof(Hea) */) / (kBtKeySize + 4 + 2 /*sizeof(BtKeypack) */))
+#define kBtValNone    0xFFFF
+#define kBtValRoot    0
+#define kLineMaxSize  512
+#define kBufferSize   2048
+#define kCatName      "VOL.CAT"
+#define kDatName      "VOL.DAT"
+
+struct BtKeypack {
+	char _key[kBtKeySize];
+	uint32 _mark;
+	uint16 _size;
+};
+
+struct Inner {
+	uint8  _key[kBtKeySize];
+	uint16 _down;
+};
+
+struct Header {
+	uint16 _count;
+	uint16 _down;
+};
+
+class IoHand {
+protected:
+	uint16 _seed;
+	Crypt *_crypt;
+public:
+	Common::File *_file;
+	uint16 _error;
+
+	IoHand(const char *name, Crypt crypt);
+	IoHand(Crypt *crypt);
+	virtual ~IoHand();
+	uint16 read(void *buf, uint16 len);
+	long mark();
+	long size();
+	long seek(long pos);
+};
+
+class IoBuf : public IoHand {
+protected:
+	uint8 *_buff;
+	uint16 _ptr;
+	uint16 _lim;
+	long _bufMark;
+	virtual void readBuf();
+public:
+	IoBuf(Crypt *crpt);
+	IoBuf(const char *name, Crypt *crpt);
+	virtual ~IoBuf();
+	uint16 read(void *buf, uint16 len);
+	uint16 read(uint8 *buf);
+	int read();
+};
+
+
+class CFile : public IoBuf {
+public:
+	CFile(const char *name, Crypt *crpt);
+	virtual ~CFile();
+	long mark();
+	long seek(long pos);
+};
+
+struct BtPage {
+	Header _header;
+	union {
+		// dummy filler to make proper size of union
+		uint8 _data[kBtSize - 4]; /* 4 is the size of struct Header */
+		// inner version of data: key + word-sized page link
+		Inner _inner[kBtInnerCount];
+		// leaf version of data: key + all user data
+		BtKeypack _leaf[kBtLeafCount];
+	};
+
+	void read(Common::ReadStream &s);
+};
+
+class BtFile : public IoHand {
+	struct {
+		BtPage *_page;
+		uint16 _pgNo;
+		int _indx;
+	} _buff[kBtLevel];
+
+	BtPage *getPage(int lev, uint16 pgn);
+public:
+	BtFile(const char *name, Crypt *crpt);
+	virtual ~BtFile();
+	BtKeypack *find(const char *key);
+	bool exist(const char *name);
+};
+
+class VFile : public IoBuf {
+private:
+	long _begMark;
+	long _endMark;
+
+	void readBuf();
+public:
+	VFile(const char *name);
+	~VFile();
+
+	long mark();
+	long size();
+	long seek(long pos);
+};
+
+class EncryptedStream {
+private:
+	Common::SeekableReadStream *_readStream;
+	bool _error;
+public:
+	EncryptedStream(const char *name);
+	~EncryptedStream();
+	bool err();
+	bool eos();
+	uint32 read(void *dataPtr, uint32 dataSize);
+	Common::String readLine();
+};
+
+extern CFile *_dat;
+extern BtFile *_cat;
+
+} // End of namespace CGE
+
+#endif