GLK: ALAN2: Initial work on the Alan2 subengine

1 files changed, 112 insertions, 0 deletions

diff --git a/engines/glk/alan2/parse.h b/engines/glk/alan2/parse.h
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+++ b/engines/glk/alan2/parse.h
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+/* 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.
+ *
+ */
+
+#ifndef GLK_ALAN2_PARSE
+#define GLK_ALAN2_PARSE
+
+namespace Glk {
+namespace Alan2 {
+
+#define LISTLEN 100
+
+class Parser {
+public:
+	Parser();
+
+	/**
+	 * Parse a new player command
+	 */
+	void parse();
+
+private:
+	void unknown(char *inputStr);
+	int lookup(char *wrd);
+	char *gettoken(char *tokenBuffer);
+	void agetline();
+	void scan();
+	void nonverb();
+	Abool objhere(Aword obj);
+	Aword acthere(Aword act);
+	Abool isHere(Aword id);
+	void buildall(ParamElem list[]);
+	void listCopy(ParamElem a[], ParamElem b[]);
+	bool listContains(ParamElem l[], Aword e);
+	void listIntersection(ParamElem a[], ParamElem b[]);
+	void listCopyFromDictionary(ParamElem p[], Aword r[]);
+	int listLength(ParamElem a[]);
+	void listCompact(ParamElem a[]);
+	void listMerge(ParamElem a[], ParamElem b[]);
+	void listSubtract(ParamElem a[], ParamElem b[]);
+	void unambig(ParamElem plst[]);
+	void simple(ParamElem olst[]);
+	void complex(ParamElem olst[]);
+	bool claCheck(ClaElem *cla);
+	void resolve(ParamElem plst[]);
+	bool endOfTable(StxElem *addr);
+	bool endOfTable(ElmElem *addr);
+	bool endOfTable(ClaElem *addr);
+	bool endOfTable(VrbElem *addr);
+	bool endOfTable(AltElem *addr);
+	bool endOfTable(ChkElem *addr);
+	AltElem *findalt(Aword vrbsadr, Aword param);
+	bool trycheck(Aaddr adr, bool act);
+	bool possible();
+	void tryMatch(ParamElem mlst[]);
+	void match(ParamElem *mlst);
+	void action(ParamElem plst[]);
+
+	// TODO: Initialize / move these
+	int wrds[LISTLEN / 2];	// List of parsed words
+	int wrdidx;			// and an index into it
+
+	bool plural = false;
+
+	// Syntax Parameters
+	int paramidx;			// Index in params
+	ParamElem *params;		// List of params
+	static ParamElem *pparams;	// Previous parameter list
+	static ParamElem *mlst;		// Multiple objects list
+	static ParamElem *pmlst;	// Previous multiple list
+
+	StxElem *stxs;		// Syntax table pointer
+	LocElem *locs;		// Location table pointer
+
+	// Literals
+	LitElem litValues[MAXPARAMS + 1];
+
+	// What did the user say?
+	int vrbwrd;			// The word he used
+	int vrbcode;			// The code for that verb
+
+	bool eol;	// Looking at End of line? Yes, initially
+	char *token;
+
+	WrdElem *dict;		// Dictionary pointer
+	int dictsize;
+
+	int allLength;		// No. of objects matching 'all'
+};
+
+} // End of namespace Alan2
+} // Engine of namespace GLK
+
+#endif