--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Parser.h Sun Feb 02 17:06:39 2014 +0200
@@ -0,0 +1,265 @@
+/*
+ Copyright 2012-2014 Santeri Piippo
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ 3. The name of the author may not be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef BOTC_PARSER_H
+#define BOTC_PARSER_H
+
+#include <stdio.h>
+#include "Main.h"
+#include "Commands.h"
+#include "LexerScanner.h"
+#include "Tokens.h"
+
+// TODO: get rid of this
+#define MAX_SCOPE 32
+
+// TODO: get rid of this too?
+#define MAX_CASE 64
+
+// TODO: get rid of this
+#define MAX_MARKS 512
+
+class DataBuffer;
+class Lexer;
+class ScriptVariable;
+
+// ============================================================================
+//
+struct UndefinedLabel
+{
+ String name;
+ ByteMark* target;
+};
+
+// ============================================================================
+// Operators
+//
+enum EOperator
+{
+ OPER_ADD,
+ OPER_SUBTRACT,
+ OPER_MULTIPLY,
+ OPER_DIVIDE,
+ OPER_MODULUS,
+ OPER_ASSIGN,
+ OPER_ASSIGNADD,
+ OPER_ASSIGNSUB,
+ OPER_ASSIGNMUL,
+ OPER_ASSIGNDIV,
+ OPER_ASSIGNMOD, // -- 10
+ OPER_EQUALS,
+ OPER_NOTEQUALS,
+ OPER_LESSTHAN,
+ OPER_GREATERTHAN,
+ OPER_LESSTHANEQUALS,
+ OPER_GREATERTHANEQUALS,
+ OPER_LEFTSHIFT,
+ OPER_RIGHTSHIFT,
+ OPER_ASSIGNLEFTSHIFT,
+ OPER_ASSIGNRIGHTSHIFT, // -- 20
+ OPER_OR,
+ OPER_AND,
+ OPER_BITWISEOR,
+ OPER_BITWISEAND,
+ OPER_BITWISEEOR,
+ OPER_TERNARY,
+ OPER_STRLEN,
+};
+
+// ============================================================================
+//
+struct operatorInfo
+{
+ EOperator opercode;
+ EDataHeader dataheader;
+ EToken token;
+};
+
+// ============================================================================
+// Mark types
+//
+enum eMarkType
+{
+ eLabelMark,
+ eIfMark,
+ eInternalMark, // internal structures
+};
+
+// ============================================================================
+// Scope types
+//
+enum EScopeType
+{
+ eUnknownScope,
+ eIfScope,
+ eWhileScope,
+ eForScope,
+ eDoScope,
+ eSwitchScope,
+ eElseScope,
+};
+
+// ============================================================================
+// Meta-data about scopes
+//
+struct ScopeInfo
+{
+ ByteMark* mark1;
+ ByteMark* mark2;
+ EScopeType type;
+ DataBuffer* buffer1;
+
+ // switch-related stuff
+ // Which case are we at?
+ int casecursor;
+
+ // Marks to case-blocks
+ ByteMark* casemarks[MAX_CASE];
+
+ // Numbers of the case labels
+ int casenumbers[MAX_CASE];
+
+ // actual case blocks
+ DataBuffer* casebuffers[MAX_CASE];
+
+ // What is the current buffer of the block?
+ DataBuffer* recordbuffer;
+};
+
+// ============================================================================
+//
+struct ConstantInfo
+{
+ String name;
+ EType type;
+ String val;
+};
+
+// ============================================================================
+//
+class BotscriptParser
+{
+ PROPERTY (public, bool, ReadOnly, BOOL_OPS, STOCK_WRITE)
+
+ public:
+ // ====================================================================
+ // METHODS
+ BotscriptParser();
+ ~BotscriptParser();
+ void ParseBotscript (String fileName);
+ DataBuffer* ParseCommand (CommandInfo* comm);
+ DataBuffer* ParseExpression (EType reqtype);
+ DataBuffer* ParseAssignment (ScriptVariable* var);
+ int ParseOperator (bool peek = false);
+ DataBuffer* ParseExprValue (EType reqtype);
+ String ParseFloat();
+ void PushScope();
+ DataBuffer* ParseStatement();
+ void AddSwitchCase (DataBuffer* b);
+ void CheckToplevel();
+ void CheckNotToplevel();
+ bool TokenIs (EToken a);
+ String GetTokenString();
+ String DescribePosition() const;
+ void WriteToFile (String outfile);
+
+ inline int GetNumEvents() const
+ {
+ return mNumEvents;
+ }
+
+ inline int GetNumStates() const
+ {
+ return mNumStates;
+ }
+
+ private:
+ // The main buffer - the contents of this is what we
+ // write to file after parsing is complete
+ DataBuffer* mMainBuffer;
+
+ // onenter buffer - the contents of the onenter{} block
+ // is buffered here and is merged further at the end of state
+ DataBuffer* mOnEnterBuffer;
+
+ // Mainloop buffer - the contents of the mainloop{} block
+ // is buffered here and is merged further at the end of state
+ DataBuffer* mMainLoopBuffer;
+
+ // Switch buffer - switch case data is recorded to this
+ // buffer initially, instead of into main buffer.
+ DataBuffer* mSwitchBuffer;
+
+ Lexer* mLexer;
+ int mNumStates;
+ int mNumEvents;
+ EParserMode mCurrentMode;
+ String mCurrentState;
+ bool mStateSpawnDefined;
+ bool mGotMainLoop;
+ int mScopeCursor;
+ DataBuffer* mIfExpression;
+ bool mCanElse;
+ List<UndefinedLabel> mUndefinedLabels;
+ List<ConstantInfo> mConstants;
+
+ // How many bytes have we written to file?
+ int mNumWrittenBytes;
+
+ // Scope data
+ // TODO: make a List
+ ScopeInfo mScopeStack[MAX_SCOPE];
+
+ DataBuffer* buffer();
+ ConstantInfo* FindConstant (const String& tok);
+ void ParseStateBlock();
+ void ParseEventBlock();
+ void ParseMainloop();
+ void ParseOnEnterExit();
+ void ParseVariableDeclaration();
+ void ParseGoto();
+ void ParseIf();
+ void ParseElse();
+ void ParseWhileBlock();
+ void ParseForBlock();
+ void ParseDoBlock();
+ void ParseSwitchBlock();
+ void ParseSwitchCase();
+ void ParseSwitchDefault();
+ void ParseBreak();
+ void ParseContinue();
+ void ParseBlockEnd();
+ void ParseConst();
+ void ParseLabel();
+ void ParseEventdef();
+ void ParseFuncdef();
+ void writeMemberBuffers();
+ void WriteStringTable();
+};
+
+#endif // BOTC_PARSER_H