forked from Mirrors/openclonk
3181 lines
81 KiB
C++
3181 lines
81 KiB
C++
/*
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* OpenClonk, http://www.openclonk.org
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*
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* Copyright (c) 2001-2004, 2006-2008, 2010 Peter Wortmann
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* Copyright (c) 2001-2004, 2006-2008, 2010 Sven Eberhardt
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* Copyright (c) 2004, 2007 Matthes Bender
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* Copyright (c) 2006, 2010 Armin Burgmeier
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* Copyright (c) 2006-2010 Günther Brammer
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* Copyright (c) 2009-2010 Nicolas Hake
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* Copyright (c) 2010 Benjamin Herr
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* Copyright (c) 2010 Mortimer
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* Copyright (c) 2001-2009, RedWolf Design GmbH, http://www.clonk.de
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*
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* Portions might be copyrighted by other authors who have contributed
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* to OpenClonk.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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* See isc_license.txt for full license and disclaimer.
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*
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* "Clonk" is a registered trademark of Matthes Bender.
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* See clonk_trademark_license.txt for full license.
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*/
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// parses scripts
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#include <C4Include.h>
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#include <utility>
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#include <C4Aul.h>
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#include <C4AulDebug.h>
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#include <C4Def.h>
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#include <C4Game.h>
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#include <C4Log.h>
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#include <C4Config.h>
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#define DEBUG_BYTECODE_DUMP 0
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#define C4AUL_Include "#include"
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#define C4AUL_Strict "#strict"
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#define C4AUL_Append "#appendto"
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#define C4AUL_Func "func"
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#define C4AUL_Private "private"
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#define C4AUL_Protected "protected"
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#define C4AUL_Public "public"
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#define C4AUL_Global "global"
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#define C4AUL_Const "const"
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#define C4AUL_If "if"
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#define C4AUL_Else "else"
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#define C4AUL_Do "do"
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#define C4AUL_While "while"
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#define C4AUL_For "for"
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#define C4AUL_In "in"
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#define C4AUL_Return "return"
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#define C4AUL_Var "Var"
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#define C4AUL_Par "Par"
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#define C4AUL_Goto "goto"
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#define C4AUL_Break "break"
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#define C4AUL_Continue "continue"
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#define C4AUL_Inherited "inherited"
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#define C4AUL_SafeInherited "_inherited"
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#define C4AUL_this "this"
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#define C4AUL_Image "Image"
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#define C4AUL_Contents "Contents"
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#define C4AUL_Condition "Condition"
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#define C4AUL_Desc "Desc"
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#define C4AUL_MethodAll "All"
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#define C4AUL_MethodNone "None"
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#define C4AUL_MethodClassic "Classic"
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#define C4AUL_MethodJumpAndRun "JumpAndRun"
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#define C4AUL_GlobalNamed "static"
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#define C4AUL_LocalNamed "local"
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#define C4AUL_VarNamed "var"
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#define C4AUL_TypeInt "int"
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#define C4AUL_TypeBool "bool"
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#define C4AUL_TypeC4ID "id"
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#define C4AUL_TypeC4Object "object"
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#define C4AUL_TypePropList "proplist"
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#define C4AUL_TypeString "string"
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#define C4AUL_TypeArray "array"
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#define C4AUL_True "true"
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#define C4AUL_False "false"
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#define C4AUL_Nil "nil"
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#define C4AUL_CodeBufSize 16
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// script token type
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enum C4AulTokenType
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{
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ATT_INVALID,// invalid token
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ATT_DIR, // directive
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ATT_IDTF, // identifier
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ATT_INT, // integer constant
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ATT_STRING, // string constant
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ATT_DOT, // "."
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ATT_COMMA, // ","
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ATT_COLON, // ":"
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ATT_SCOLON, // ";"
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ATT_BOPEN, // "("
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ATT_BCLOSE, // ")"
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ATT_BOPEN2, // "["
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ATT_BCLOSE2,// "]"
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ATT_BLOPEN, // "{"
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ATT_BLCLOSE,// "}"
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ATT_CALL, // "->"
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ATT_CALLFS, // "->~"
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ATT_STAR, // "*"
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ATT_LDOTS, // '...'
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ATT_SET, // '='
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ATT_OPERATOR,// operator
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ATT_EOF // end of file
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};
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class C4AulParseState
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{
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public:
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enum Type { PARSER, PREPARSER };
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C4AulParseState(C4AulScriptFunc *Fn, C4AulScript * a, enum Type Type):
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Fn(Fn), a(a), SPos(Fn ? Fn->Script : a->Script.getData()),
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TokenType(ATT_INVALID),
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Done(false),
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Type(Type),
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ContextToExecIn(NULL),
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fJump(false),
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iStack(0),
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pLoopStack(NULL)
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{ }
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~C4AulParseState()
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{ while (pLoopStack) PopLoop(); ClearToken(); }
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C4AulScriptFunc *Fn; C4AulScript * a;
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const char *SPos; // current position in the script
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char Idtf[C4AUL_MAX_Identifier]; // current identifier
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C4AulTokenType TokenType; // current token type
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int32_t cInt; // current int constant
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C4String * cStr; // current string constant
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bool Done; // done parsing?
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enum Type Type; // emitting bytecode?
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C4AulScriptContext* ContextToExecIn;
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void Parse_Script();
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void Parse_FuncHead();
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void Parse_Desc();
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void Parse_Function();
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void Parse_Statement();
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void Parse_Block();
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int Parse_Params(int iMaxCnt, const char * sWarn, C4AulFunc * pFunc = 0);
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void Parse_Array();
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void Parse_PropList();
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void Parse_DoWhile();
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void Parse_While();
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void Parse_If();
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void Parse_For();
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void Parse_ForEach();
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void Parse_Expression(int iParentPrio = -1);
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void Parse_Expression2(int iParentPrio = -1);
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void Parse_Var();
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void Parse_Local();
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void Parse_Static();
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void Parse_Const();
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C4Value Parse_ConstExpression();
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bool AdvanceSpaces(); // skip whitespaces; return whether script ended
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int GetOperator(const char* pScript);
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// Simply discard the string, put it in the Table and delete it with the script or delete it when refcount drops
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enum OperatorPolicy { OperatorsPlease = 0, StarsPlease };
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void ClearToken(); // clear any data held with the current token
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C4AulTokenType GetNextToken(OperatorPolicy Operator = OperatorsPlease); // get next token of SPos
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void Shift(OperatorPolicy Operator = OperatorsPlease);
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void Match(C4AulTokenType TokenType, const char * Message = NULL);
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void UnexpectedToken(const char * Expected) NORETURN;
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static const char * GetTokenName(C4AulTokenType TokenType);
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void Warn(const char *pMsg, const char *pIdtf=0);
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void Error(const char *pMsg, const char *pIdtf=0);
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private:
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bool fJump;
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int iStack;
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int GetStackValue(C4AulBCCType eType, intptr_t X = 0);
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void AddBCC(C4AulBCCType eType, intptr_t X = 0);
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void RemoveLastBCC();
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C4V_Type GetLastRetType(C4V_Type to); // for warning purposes
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C4AulBCC MakeSetter(bool fLeaveValue = false); // Prepares to generate a setter for the last value that was generated
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int JumpHere(); // Get position for a later jump to next instruction added
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void SetJumpHere(int iJumpOp); // Use the next inserted instruction as jump target for the given jump operation
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void SetJump(int iJumpOp, int iWhere);
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void AddJump(C4AulBCCType eType, int iWhere);
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// Keep track of loops and break/continue usages
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struct Loop
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{
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struct Control
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{
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bool Break;
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int Pos;
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Control *Next;
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};
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Control *Controls;
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int StackSize;
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Loop *Next;
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};
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Loop *pLoopStack;
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void PushLoop();
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void PopLoop();
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void AddLoopControl(bool fBreak);
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};
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void C4AulScript::Warn(const char *pMsg, const char *pIdtf)
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{
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// display error
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C4AulParseError warning(this, pMsg, pIdtf, true);
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// display it
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warning.show();
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// count warnings
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++::ScriptEngine.warnCnt;
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}
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void C4AulParseState::Warn(const char *pMsg, const char *pIdtf)
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{
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// do not show errors for System.ocg scripts that appear to be pure #appendto scripts
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if (Fn && !Fn->Owner->Def && !Fn->Owner->Appends.empty()) return;
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// script doesn't own function -> skip
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// (exception: global functions)
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//if(pFunc) if(pFunc->pOrgScript != pScript && pScript != (C4AulScript *)&::ScriptEngine) return;
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// display error
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C4AulParseError warning(this, pMsg, pIdtf, true);
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// display it
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warning.show();
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if (Fn && Fn->pOrgScript != a)
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DebugLogF(" (as #appendto/#include to %s)", Fn->Owner->ScriptName.getData());
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// count warnings
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++::ScriptEngine.warnCnt;
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}
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void C4AulParseState::Error(const char *pMsg, const char *pIdtf)
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{
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throw new C4AulParseError(this, pMsg, pIdtf);
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}
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C4AulParseError::C4AulParseError(C4AulParseState * state, const char *pMsg, const char *pIdtf, bool Warn)
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: C4AulError()
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{
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// compose error string
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sMessage.Format("%s: %s%s",
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Warn ? "WARNING" : "ERROR",
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pMsg,
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pIdtf ? pIdtf : "");
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if (state->Fn && *(state->Fn->Name))
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{
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// Show function name
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sMessage.AppendFormat(" (in %s", state->Fn->Name);
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// Exact position
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if (state->Fn->pOrgScript && state->SPos)
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sMessage.AppendFormat(", %s:%d:%d)",
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state->Fn->pOrgScript->ScriptName.getData(),
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SGetLine(state->Fn->pOrgScript->Script.getData(), state->SPos),
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SLineGetCharacters(state->Fn->pOrgScript->Script.getData(), state->SPos));
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else
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sMessage.AppendChar(')');
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}
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else if (state->a)
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{
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// Script name
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sMessage.AppendFormat(" (%s:%d:%d)",
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state->a->ScriptName.getData(),
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SGetLine(state->a->Script.getData(), state->SPos),
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SLineGetCharacters(state->a->Script.getData(), state->SPos));
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}
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}
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C4AulParseError::C4AulParseError(C4AulScript *pScript, const char *pMsg, const char *pIdtf, bool Warn)
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{
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// compose error string
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sMessage.Format("%s: %s%s",
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Warn ? "WARNING" : "ERROR",
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pMsg,
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pIdtf ? pIdtf : "");
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if (pScript)
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{
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// Script name
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sMessage.AppendFormat(" (%s)",
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pScript->ScriptName.getData());
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}
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}
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void C4AulScriptFunc::ParseDesc()
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{
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// do nothing if no desc is given
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if (!Desc.getLength()) return;
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const char *DPos = Desc.getData();
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// parse desc
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while (*DPos)
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{
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const char *DPos0 = DPos; // beginning of segment
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const char *DPos2 = NULL; // pos of equal sign, if found
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// parse until end of segment
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while (*DPos && (*DPos != '|'))
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{
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// store break pos if found
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if (*DPos == '=') if (!DPos2) DPos2 = DPos;
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DPos++;
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}
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// if this was an assignment segment, get value to assign
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if (DPos2)
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{
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StdCopyStrBuf Val;
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Val.Append(DPos2 + 1, DPos - DPos2 - 1);
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// Image
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if (SEqual2(DPos0, C4AUL_Image))
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{
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// image: special contents-image?
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if (Val == C4AUL_Contents)
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idImage = C4ID::Contents;
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else
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{
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// Find phase separator (:)
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char *colon;
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for (colon = Val.getMData(); *colon != ':' && *colon != '\0'; ++ colon) {}
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if (*colon == ':') *colon = '\0';
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else colon = NULL;
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// get image id
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idImage = C4ID(Val.getData());
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// get image phase
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if (colon)
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iImagePhase = atoi(colon + 1);
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}
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}
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// Condition
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else if (SEqual2(DPos0, C4AUL_Condition))
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// condition? get condition func
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Condition = Owner->GetFuncRecursive(Val.getData());
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// Long Description
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else if (SEqual2(DPos0, C4AUL_Desc))
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{
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DescLong.Take(std::move(Val));
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}
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// unrecognized? never mind
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}
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if (*DPos) DPos++;
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}
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assert(!Condition || !Condition->Owner->Def || Condition->Owner->Def == Owner->Def);
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// copy desc text
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DescText.CopyUntil(Desc.getData(), '|');
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}
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bool C4AulParseState::AdvanceSpaces()
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{
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char C, C2 = (char) 0;
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// defaultly, not in comment
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int InComment = 0; // 0/1/2 = no comment/line comment/multi line comment
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// don't go past end
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while ((C = *SPos))
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{
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// loop until out of comment and non-whitespace is found
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switch (InComment)
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{
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case 0:
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if (C == '/')
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{
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SPos++;
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switch (*SPos)
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{
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case '/': InComment = 1; break;
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case '*': InComment = 2; break;
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default: SPos--; return true;
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}
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}
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// Skip those stupid "zero width no-break spaces" (also known as Byte Order Marks)
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else if (C == '\xEF' && *(SPos + 1) == '\xBB' && *(SPos + 2) == '\xBF')
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SPos += 2;
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else if ((BYTE) C > 32) return true;
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break;
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case 1:
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if (((BYTE) C == 13) || ((BYTE) C == 10)) InComment = 0;
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break;
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case 2:
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if ((C == '/') && (C2 == '*')) InComment = 0;
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break;
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}
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// next char; store prev
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SPos++; C2 = C;
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}
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// end of script reached; return false
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return false;
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}
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//=========================== C4Script Operator Map ===================================
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struct C4ScriptOpDef
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{
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unsigned short Priority;
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const char* Identifier;
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C4AulBCCType Code;
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C4AulBCCType ResultModifier; // code to apply to result after it was calculated
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bool Postfix;
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bool Changer; // changes first operand to result, rewrite to "a = a (op) b"
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bool NoSecondStatement; // no second statement expected (++/-- postfix)
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C4V_Type RetType; // type returned. ignored by C4V
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C4V_Type Type1;
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C4V_Type Type2;
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};
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static C4ScriptOpDef C4ScriptOpMap[] =
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{
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// priority postfix
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// | identifier | changer
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// | | Bytecode Result | | no second id
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// | | | Modifier | | | RetType ParType1 ParType2
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// prefix
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{ 15, "++", AB_Inc, AB_ERR, 0, 1, 0, C4V_Int, C4V_Int, C4V_Any},
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{ 15, "--", AB_Dec, AB_ERR, 0, 1, 0, C4V_Int, C4V_Int, C4V_Any},
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{ 15, "~", AB_BitNot, AB_ERR, 0, 0, 0, C4V_Int, C4V_Int, C4V_Any},
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{ 15, "!", AB_Not, AB_ERR, 0, 0, 0, C4V_Bool, C4V_Bool, C4V_Any},
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{ 15, "+", AB_ERR, AB_ERR, 0, 0, 0, C4V_Int, C4V_Int, C4V_Any},
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{ 15, "-", AB_Neg, AB_ERR, 0, 0, 0, C4V_Int, C4V_Int, C4V_Any},
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// postfix (whithout second statement)
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{ 16, "++", AB_Inc, AB_Dec, 1, 1, 1, C4V_Int, C4V_Int, C4V_Any},
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{ 16, "--", AB_Dec, AB_Inc, 1, 1, 1, C4V_Int, C4V_Int, C4V_Any},
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// postfix
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{ 14, "**", AB_Pow, AB_ERR, 1, 0, 0, C4V_Int, C4V_Int, C4V_Int},
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{ 13, "/", AB_Div, AB_ERR, 1, 0, 0, C4V_Int, C4V_Int, C4V_Int},
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{ 13, "*", AB_Mul, AB_ERR, 1, 0, 0, C4V_Int, C4V_Int, C4V_Int},
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{ 13, "%", AB_Mod, AB_ERR, 1, 0, 0, C4V_Int, C4V_Int, C4V_Int},
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{ 12, "-", AB_Sub, AB_ERR, 1, 0, 0, C4V_Int, C4V_Int, C4V_Int},
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{ 12, "+", AB_Sum, AB_ERR, 1, 0, 0, C4V_Int, C4V_Int, C4V_Int},
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{ 11, "<<", AB_LeftShift, AB_ERR, 1, 0, 0, C4V_Int, C4V_Int, C4V_Int},
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{ 11, ">>", AB_RightShift, AB_ERR, 1, 0, 0, C4V_Int, C4V_Int, C4V_Int},
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{ 10, "<", AB_LessThan, AB_ERR, 1, 0, 0, C4V_Bool, C4V_Int, C4V_Int},
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{ 10, "<=", AB_LessThanEqual, AB_ERR, 1, 0, 0, C4V_Bool, C4V_Int, C4V_Int},
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{ 10, ">", AB_GreaterThan, AB_ERR, 1, 0, 0, C4V_Bool, C4V_Int, C4V_Int},
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{ 10, ">=", AB_GreaterThanEqual,AB_ERR, 1, 0, 0, C4V_Bool, C4V_Int, C4V_Int},
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{ 9, "==", AB_Equal, AB_ERR, 1, 0, 0, C4V_Bool, C4V_Any, C4V_Any},
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{ 9, "!=", AB_NotEqual, AB_ERR, 1, 0, 0, C4V_Bool, C4V_Any, C4V_Any},
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{ 8, "&", AB_BitAnd, AB_ERR, 1, 0, 0, C4V_Int, C4V_Int, C4V_Int},
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{ 6, "^", AB_BitXOr, AB_ERR, 1, 0, 0, C4V_Int, C4V_Int, C4V_Int},
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{ 6, "|", AB_BitOr, AB_ERR, 1, 0, 0, C4V_Int, C4V_Int, C4V_Int},
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|
{ 5, "&&", AB_JUMPAND, AB_ERR, 1, 0, 0, C4V_Bool, C4V_Bool, C4V_Bool},
|
|
{ 4, "||", AB_JUMPOR, AB_ERR, 1, 0, 0, C4V_Bool, C4V_Bool, C4V_Bool},
|
|
|
|
// changers
|
|
{ 2, "*=", AB_Mul, AB_ERR, 1, 1, 0, C4V_Int, C4V_Int, C4V_Int},
|
|
{ 2, "/=", AB_Div, AB_ERR, 1, 1, 0, C4V_Int, C4V_Int, C4V_Int},
|
|
{ 2, "%=", AB_Mod, AB_ERR, 1, 1, 0, C4V_Int, C4V_Int, C4V_Int},
|
|
{ 2, "+=", AB_Sum, AB_ERR, 1, 1, 0, C4V_Int, C4V_Int, C4V_Int},
|
|
{ 2, "-=", AB_Sub, AB_ERR, 1, 1, 0, C4V_Int, C4V_Int, C4V_Int},
|
|
{ 2, "&=", AB_BitAnd, AB_ERR, 1, 1, 0, C4V_Int, C4V_Int, C4V_Int},
|
|
{ 2, "|=", AB_BitOr, AB_ERR, 1, 1, 0, C4V_Int, C4V_Int, C4V_Int},
|
|
{ 2, "^=", AB_BitXOr, AB_ERR, 1, 1, 0, C4V_Int, C4V_Int, C4V_Int},
|
|
|
|
{ 0, NULL, AB_ERR, AB_ERR, 0, 0, 0, C4V_Any, C4V_Any, C4V_Any}
|
|
};
|
|
|
|
static C4V_Type GetOperatorRetType(C4AulBCCType Code)
|
|
{
|
|
for (int i = 0; C4ScriptOpMap[i].Identifier; i++)
|
|
if (C4ScriptOpMap[i].Code == Code)
|
|
return C4ScriptOpMap[i].RetType;
|
|
}
|
|
|
|
int C4AulParseState::GetOperator(const char* pScript)
|
|
{
|
|
// return value:
|
|
// >= 0: operator found. could be found in C4ScriptOfDef
|
|
// -1: isn't an operator
|
|
|
|
unsigned int i;
|
|
|
|
if (!*pScript) return 0;
|
|
// operators are not alphabetical
|
|
if ((*pScript >= 'a' && *pScript <= 'z') ||
|
|
(*pScript >= 'A' && *pScript <= 'Z'))
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
// it is a two-char-operator?
|
|
for (i=0; C4ScriptOpMap[i].Identifier; i++)
|
|
if (SLen(C4ScriptOpMap[i].Identifier) == 2)
|
|
if (SEqual2(pScript, C4ScriptOpMap[i].Identifier))
|
|
return i;
|
|
|
|
// if not, a one-char one?
|
|
for (i=0; C4ScriptOpMap[i].Identifier; i++)
|
|
if (SLen(C4ScriptOpMap[i].Identifier) == 1)
|
|
if (SEqual2(pScript, C4ScriptOpMap[i].Identifier))
|
|
return i;
|
|
|
|
return -1;
|
|
}
|
|
|
|
void C4AulParseState::ClearToken()
|
|
{
|
|
// if last token was a string, make sure its ref is deleted
|
|
if (TokenType == ATT_STRING && cStr)
|
|
{
|
|
cStr->DecRef();
|
|
TokenType = ATT_INVALID;
|
|
}
|
|
}
|
|
|
|
C4AulTokenType C4AulParseState::GetNextToken(OperatorPolicy Operator)
|
|
{
|
|
// clear mem of prev token
|
|
ClearToken();
|
|
// move to start of token
|
|
if (!AdvanceSpaces()) return ATT_EOF;
|
|
// store offset
|
|
const char *SPos0 = SPos;
|
|
int Len = 0;
|
|
// token get state
|
|
enum TokenGetState
|
|
{
|
|
TGS_None, // just started
|
|
TGS_Ident, // getting identifier
|
|
TGS_Int, // getting integer
|
|
TGS_IntHex, // getting hexadecimal integer
|
|
TGS_String, // getting string
|
|
TGS_Dir // getting directive
|
|
};
|
|
TokenGetState State = TGS_None;
|
|
|
|
std::string strbuf;
|
|
|
|
// loop until finished
|
|
while (true)
|
|
{
|
|
// get char
|
|
char C = *SPos;
|
|
|
|
switch (State)
|
|
{
|
|
case TGS_None:
|
|
{
|
|
int iOpID;
|
|
// Mostly sorted by frequency, except that tokens that have
|
|
// other tokens as prefixes need to be checked for first.
|
|
if ((C >= 'A' && C <= 'Z') || (C >= 'a' && C <= 'z') || (C == '_'))
|
|
{
|
|
// SPos will be increased at the end of the loop
|
|
State = TGS_Ident;
|
|
}
|
|
else if (C == '(') {SPos++; return ATT_BOPEN; } // "("
|
|
else if (C == ')') {SPos++; return ATT_BCLOSE;} // ")"
|
|
else if (C == ',') {SPos++; return ATT_COMMA; } // ","
|
|
else if (C == ';') {SPos++; return ATT_SCOLON;} // ";"
|
|
else if (((C >= '0') && (C <= '9')))
|
|
State = TGS_Int; // integer by 0-9
|
|
else if (C == '-' && *(SPos + 1) == '>' && *(SPos + 2) == '~')
|
|
{ SPos+=3;return ATT_CALLFS;} // "->~"
|
|
else if (C == '-' && *(SPos + 1) == '>')
|
|
{ SPos+=2;return ATT_CALL; } // "->"
|
|
else if (C == '*' && Operator == StarsPlease)
|
|
{ SPos++; return ATT_STAR; } // "*"
|
|
else if ((iOpID = GetOperator(SPos)) != -1)
|
|
{
|
|
SPos += SLen(C4ScriptOpMap[iOpID].Identifier);
|
|
cInt = iOpID;
|
|
return ATT_OPERATOR;
|
|
}
|
|
else if (C == '=') {SPos++; return ATT_SET; } // "="
|
|
else if (C == '{') {SPos++; return ATT_BLOPEN;} // "{"
|
|
else if (C == '}') {SPos++; return ATT_BLCLOSE;}// "}"
|
|
else if (C == '"')
|
|
{
|
|
State = TGS_String; // string by "
|
|
strbuf.reserve(512); // assume most strings to be smaller than this
|
|
}
|
|
else if (C == '[') {SPos++; return ATT_BOPEN2;} // "["
|
|
else if (C == ']') {SPos++; return ATT_BCLOSE2;}// "]"
|
|
else if (C == '.' && *(SPos + 1) == '.' && *(SPos + 2) == '.')
|
|
{ SPos+=3;return ATT_LDOTS; } // "..."
|
|
else if (C == '.') {SPos++; return ATT_DOT; } // "."
|
|
else if (C == '#') State = TGS_Dir; // directive by "#"
|
|
else if (C == ':') {SPos++; return ATT_COLON; } // ":"
|
|
else
|
|
{
|
|
// unrecognized char
|
|
// make sure to skip the invalid char so the error won't be output forever
|
|
++SPos;
|
|
// show appropriate error message
|
|
if (C >= '!' && C <= '~')
|
|
throw new C4AulParseError(this, FormatString("unexpected character '%c' found", C).getData());
|
|
else
|
|
throw new C4AulParseError(this, FormatString("unexpected character 0x%x found", (int)(unsigned char) C).getData());
|
|
}
|
|
break;
|
|
}
|
|
case TGS_Ident: // ident and directive: parse until non ident-char is found
|
|
case TGS_Dir:
|
|
if ( !Inside(C, '0', '9')
|
|
&& !Inside(C, 'a', 'z')
|
|
&& !Inside(C, 'A', 'Z')
|
|
&& C != '_')
|
|
{
|
|
// return ident/directive
|
|
Len = Min(Len, C4AUL_MAX_Identifier);
|
|
SCopy(SPos0, Idtf, Len);
|
|
// directive?
|
|
if (State == TGS_Dir) return ATT_DIR;
|
|
// everything else is an identifier
|
|
return ATT_IDTF;
|
|
}
|
|
break;
|
|
|
|
case TGS_Int: // integer: parse until non-number is found
|
|
case TGS_IntHex:
|
|
if ((C < '0') || (C > '9'))
|
|
{
|
|
int base;
|
|
if (State == TGS_Int)
|
|
{
|
|
// turn to hex mode?
|
|
if (*SPos0 == '0' && C == 'x' && Len == 1)
|
|
{
|
|
State = TGS_IntHex;
|
|
break;
|
|
}
|
|
// parse as decimal int
|
|
base = 10;
|
|
}
|
|
else
|
|
{
|
|
// parse as hexadecimal int: Also allow 'a' to 'f' and 'A' to 'F'
|
|
if ((C>='A' && C<='F') || (C>='a' && C<='f')) break;
|
|
base = 16;
|
|
}
|
|
// return integer
|
|
Len = Min(Len, C4AUL_MAX_Identifier);
|
|
SCopy(SPos0, Idtf, Len);
|
|
// do not parse 0x prefix for hex
|
|
const char * pToken = Idtf;
|
|
if (State == TGS_IntHex) pToken += 2;
|
|
// it's not, so return the int
|
|
cInt = StrToI32(pToken, base, 0);
|
|
return ATT_INT;
|
|
}
|
|
break;
|
|
|
|
case TGS_String: // string: parse until '"'; check for eof!
|
|
|
|
// string end
|
|
if (C == '"')
|
|
{
|
|
SPos++;
|
|
cStr = Strings.RegString(StdStrBuf(strbuf.data(),strbuf.size()));
|
|
// hold onto string, ClearToken will deref it
|
|
cStr->IncRef();
|
|
return ATT_STRING;
|
|
}
|
|
else
|
|
{
|
|
if (C == '\\') // escape
|
|
switch (*(SPos + 1))
|
|
{
|
|
case '"': SPos ++; strbuf.push_back('"'); break;
|
|
case '\\': SPos ++; strbuf.push_back('\\'); break;
|
|
case 'n': SPos ++; strbuf.push_back('\n'); break;
|
|
case 't': SPos ++; strbuf.push_back('\t'); break;
|
|
case 'x':
|
|
{
|
|
++SPos;
|
|
// hexadecimal escape: \xAD.
|
|
// First char must be a hexdigit
|
|
if (!std::isxdigit(SPos[1]))
|
|
{
|
|
Warn("\\x used with no following hex digits");
|
|
strbuf.push_back('\\'); strbuf.push_back('x');
|
|
}
|
|
else
|
|
{
|
|
char ch = 0;
|
|
while (std::isxdigit(SPos[1]))
|
|
{
|
|
++SPos;
|
|
ch *= 16;
|
|
if (*SPos >= '0' && *SPos <= '9')
|
|
ch += *SPos - '0';
|
|
else if (*SPos >= 'a' && *SPos <= 'f')
|
|
ch += *SPos - 'a' + 10;
|
|
else if (*SPos >= 'A' && *SPos <= 'F')
|
|
ch += *SPos - 'A' + 10;
|
|
};
|
|
strbuf.push_back(ch);
|
|
}
|
|
break;
|
|
}
|
|
case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7':
|
|
{
|
|
// Octal escape: \142
|
|
char ch = 0;
|
|
while (SPos[1] >= '0' && SPos[1] <= '7')
|
|
{
|
|
ch *= 8;
|
|
ch += *++SPos -'0';
|
|
}
|
|
strbuf.push_back(ch);
|
|
}
|
|
break;
|
|
default:
|
|
{
|
|
// just insert "\"
|
|
strbuf.push_back('\\');
|
|
// show warning
|
|
char strEscape[2] = { *(SPos + 1), 0 };
|
|
Warn("unknown escape: ", strEscape);
|
|
}
|
|
}
|
|
else if (C == 0 || C == 10 || C == 13) // line break / feed
|
|
throw new C4AulParseError(this, "string not closed");
|
|
|
|
else
|
|
// copy character
|
|
strbuf.push_back(C);
|
|
}
|
|
break;
|
|
|
|
}
|
|
// next char
|
|
SPos++; Len++;
|
|
}
|
|
}
|
|
|
|
static const char * GetTTName(C4AulBCCType e)
|
|
{
|
|
switch (e)
|
|
{
|
|
case AB_ARRAYA: return "ARRAYA"; // array access
|
|
case AB_ARRAYA_SET: return "ARRAYA_SET"; // setter
|
|
case AB_PROP: return "PROP";
|
|
case AB_PROP_SET: return "PROP_SET";
|
|
case AB_ARRAY_SLICE: return "ARRAY_SLICE";
|
|
case AB_ARRAY_SLICE_SET: return "ARRAY_SLICE_SET";
|
|
case AB_VARN: return "VARN"; // a named var
|
|
case AB_VARN_SET: return "VARN_SET";
|
|
case AB_PARN: return "PARN"; // a named parameter
|
|
case AB_PARN_SET: return "PARN_SET";
|
|
case AB_LOCALN: return "LOCALN"; // a named local
|
|
case AB_LOCALN_SET: return "LOCALN_SET";
|
|
case AB_GLOBALN: return "GLOBALN"; // a named global
|
|
case AB_GLOBALN_SET: return "GLOBALN_SET";
|
|
case AB_PAR: return "PAR"; // Par statement
|
|
case AB_FUNC: return "FUNC"; // function
|
|
|
|
case AB_PARN_CONTEXT: return "AB_PARN_CONTEXT";
|
|
case AB_VARN_CONTEXT: return "AB_VARN_CONTEXT";
|
|
|
|
// prefix
|
|
case AB_Inc: return "Inc"; // ++
|
|
case AB_Dec: return "Dec"; // --
|
|
case AB_BitNot: return "BitNot"; // ~
|
|
case AB_Not: return "Not"; // !
|
|
case AB_Neg: return "Neg"; // -
|
|
|
|
// postfix
|
|
case AB_Pow: return "Pow"; // **
|
|
case AB_Div: return "Div"; // /
|
|
case AB_Mul: return "Mul"; // *
|
|
case AB_Mod: return "Mod"; // %
|
|
case AB_Sub: return "Sub"; // -
|
|
case AB_Sum: return "Sum"; // +
|
|
case AB_LeftShift: return "LeftShift"; // <<
|
|
case AB_RightShift: return "RightShift"; // >>
|
|
case AB_LessThan: return "LessThan"; // <
|
|
case AB_LessThanEqual: return "LessThanEqual"; // <=
|
|
case AB_GreaterThan: return "GreaterThan"; // >
|
|
case AB_GreaterThanEqual: return "GreaterThanEqual"; // >=
|
|
case AB_Equal: return "Equal"; // ==
|
|
case AB_NotEqual: return "NotEqual"; // !=
|
|
case AB_BitAnd: return "BitAnd"; // &
|
|
case AB_BitXOr: return "BitXOr"; // ^
|
|
case AB_BitOr: return "BitOr"; // |
|
|
|
|
case AB_CALL: return "CALL"; // direct object call
|
|
case AB_CALLFS: return "CALLFS"; // failsafe direct call
|
|
case AB_STACK: return "STACK"; // push nulls / pop
|
|
case AB_INT: return "INT"; // constant: int
|
|
case AB_BOOL: return "BOOL"; // constant: bool
|
|
case AB_STRING: return "STRING"; // constant: string
|
|
case AB_CPROPLIST: return "CPROPLIST"; // constant: proplist
|
|
case AB_CARRAY: return "CARRAY"; // constant: array
|
|
case AB_NIL: return "NIL"; // constant: nil
|
|
case AB_NEW_ARRAY: return "NEW_ARRAY"; // semi-constant: array
|
|
case AB_DUP: return "DUP"; // duplicate value from stack
|
|
case AB_NEW_PROPLIST: return "NEW_PROPLIST"; // create a new proplist
|
|
case AB_IVARN: return "IVARN"; // initialization of named var
|
|
case AB_JUMP: return "JUMP"; // jump
|
|
case AB_JUMPAND: return "JUMPAND";
|
|
case AB_JUMPOR: return "JUMPOR";
|
|
case AB_CONDN: return "CONDN"; // conditional jump (negated, pops stack)
|
|
case AB_COND: return "COND"; // conditional jump (pops stack)
|
|
case AB_FOREACH_NEXT: return "FOREACH_NEXT"; // foreach: next element
|
|
case AB_RETURN: return "RETURN"; // return statement
|
|
case AB_ERR: return "ERR"; // parse error at this position
|
|
case AB_DEBUG: return "DEBUG"; // debug break
|
|
case AB_EOFN: return "EOFN"; // end of function
|
|
case AB_EOF: return "EOF";
|
|
|
|
default: return "?";
|
|
}
|
|
}
|
|
|
|
void C4AulScript::AddBCC(C4AulBCCType eType, intptr_t X, const char * SPos)
|
|
{
|
|
// store chunk
|
|
C4AulBCC bcc;
|
|
bcc.bccType = eType;
|
|
bcc.Par.X = X;
|
|
Code.push_back(bcc);
|
|
PosForCode.push_back(SPos);
|
|
|
|
CPos = &Code.back();
|
|
switch (eType)
|
|
{
|
|
case AB_STRING: case AB_CALL: case AB_CALLFS: case AB_LOCALN: case AB_PROP:
|
|
/* case AB_LOCALN_SET/AB_PROP_SET: -- expected to already have a reference upon creation, see MakeSetter */
|
|
CPos->Par.s->IncRef();
|
|
break;
|
|
default: break;
|
|
}
|
|
CPos++;
|
|
}
|
|
|
|
void C4AulScript::RemoveLastBCC()
|
|
{
|
|
C4AulBCC *pBCC = &Code.back();
|
|
switch (pBCC->bccType)
|
|
{
|
|
case AB_STRING: case AB_CALL: case AB_CALLFS: case AB_LOCALN: case AB_LOCALN_SET: case AB_PROP: case AB_PROP_SET:
|
|
pBCC->Par.s->DecRef();
|
|
break;
|
|
default: break;
|
|
}
|
|
Code.pop_back();
|
|
PosForCode.pop_back();
|
|
CPos--;
|
|
}
|
|
|
|
void C4AulScript::ClearCode()
|
|
{
|
|
while(Code.size() > 0)
|
|
RemoveLastBCC();
|
|
// add one empty chunk to init CPos
|
|
AddBCC(AB_ERR);
|
|
}
|
|
|
|
int C4AulScriptFunc::GetLineOfCode(C4AulBCC * bcc)
|
|
{
|
|
return SGetLine(pOrgScript->GetScript(), GetCodeOwner()->PosForCode[bcc - &GetCodeOwner()->Code[0]]);
|
|
}
|
|
|
|
C4AulBCC * C4AulScriptFunc::GetCode()
|
|
{
|
|
return &GetCodeOwner()->Code[CodePos];
|
|
}
|
|
|
|
C4AulScript * C4AulScriptFunc::GetCodeOwner()
|
|
{
|
|
return Owner == Owner->Engine ? LinkedTo->Owner : Owner;
|
|
}
|
|
|
|
bool C4AulScript::Preparse()
|
|
{
|
|
// handle easiest case first
|
|
if (State < ASS_NONE) return false;
|
|
if (!Script) { State = ASS_PREPARSED; return true; }
|
|
|
|
// clear stuff
|
|
Includes.clear(); Appends.clear();
|
|
// reset code
|
|
ClearCode();
|
|
while (Func0)
|
|
{
|
|
// belongs to this script?
|
|
if (Func0->SFunc())
|
|
if (Func0->SFunc()->pOrgScript == this)
|
|
// then desroy linked funcs, too
|
|
Func0->DestroyLinked();
|
|
// destroy func
|
|
delete Func0;
|
|
}
|
|
|
|
C4AulParseState state(0, this, C4AulParseState::PREPARSER);
|
|
state.Parse_Script();
|
|
|
|
// no #strict? we don't like that :(
|
|
if (Strict < MAXSTRICT)
|
|
{
|
|
Engine->nonStrictCnt++;
|
|
}
|
|
|
|
// done, reset state var
|
|
Preparsing=false;
|
|
|
|
// #include will have to be resolved now...
|
|
IncludesResolved = false;
|
|
|
|
// return success
|
|
C4AulScript::State = ASS_PREPARSED;
|
|
return true;
|
|
}
|
|
|
|
|
|
int C4AulParseState::GetStackValue(C4AulBCCType eType, intptr_t X)
|
|
{
|
|
switch (eType)
|
|
{
|
|
case AB_INT:
|
|
case AB_BOOL:
|
|
case AB_STRING:
|
|
case AB_CPROPLIST:
|
|
case AB_CARRAY:
|
|
case AB_NIL:
|
|
case AB_VARN:
|
|
case AB_PARN:
|
|
case AB_PARN_CONTEXT:
|
|
case AB_VARN_CONTEXT:
|
|
case AB_LOCALN:
|
|
case AB_GLOBALN:
|
|
case AB_DUP:
|
|
return 1;
|
|
|
|
case AB_Pow:
|
|
case AB_Div:
|
|
case AB_Mul:
|
|
case AB_Mod:
|
|
case AB_Sub:
|
|
case AB_Sum:
|
|
case AB_LeftShift:
|
|
case AB_RightShift:
|
|
case AB_LessThan:
|
|
case AB_LessThanEqual:
|
|
case AB_GreaterThan:
|
|
case AB_GreaterThanEqual:
|
|
case AB_Equal:
|
|
case AB_NotEqual:
|
|
case AB_BitAnd:
|
|
case AB_BitXOr:
|
|
case AB_BitOr:
|
|
case AB_PROP_SET:
|
|
case AB_ARRAYA:
|
|
case AB_CONDN:
|
|
case AB_COND:
|
|
case AB_IVARN:
|
|
case AB_RETURN:
|
|
// JUMPAND/JUMPOR are special: They either jump over instructions adding one to the stack
|
|
// or decrement the stack. Thus, for stack counting purposes, they decrement.
|
|
case AB_JUMPAND:
|
|
case AB_JUMPOR:
|
|
return -1;
|
|
|
|
case AB_FUNC:
|
|
return -reinterpret_cast<C4AulFunc *>(X)->GetParCount() + 1;
|
|
|
|
case AB_CALL:
|
|
case AB_CALLFS:
|
|
return -C4AUL_MAX_Par;
|
|
|
|
case AB_VARN_SET:
|
|
case AB_PARN_SET:
|
|
case AB_LOCALN_SET:
|
|
case AB_PROP:
|
|
case AB_GLOBALN_SET:
|
|
case AB_Inc:
|
|
case AB_Dec:
|
|
case AB_BitNot:
|
|
case AB_Not:
|
|
case AB_Neg:
|
|
case AB_PAR:
|
|
case AB_FOREACH_NEXT:
|
|
case AB_ERR:
|
|
case AB_EOFN:
|
|
case AB_EOF:
|
|
case AB_JUMP:
|
|
case AB_DEBUG:
|
|
return 0;
|
|
|
|
case AB_STACK:
|
|
return X;
|
|
|
|
case AB_NEW_ARRAY:
|
|
return -X+1;
|
|
|
|
case AB_NEW_PROPLIST:
|
|
return -X * 2 + 1;
|
|
|
|
case AB_ARRAYA_SET:
|
|
case AB_ARRAY_SLICE:
|
|
return -2;
|
|
|
|
case AB_ARRAY_SLICE_SET:
|
|
return -3;
|
|
|
|
default:
|
|
assert(false);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void C4AulParseState::AddBCC(C4AulBCCType eType, intptr_t X)
|
|
{
|
|
if (Type != PARSER) return;
|
|
|
|
// Track stack size
|
|
iStack += GetStackValue(eType, X);
|
|
|
|
// Use stack operation instead of 0-Any (enable optimization)
|
|
if (eType == AB_NIL)
|
|
{
|
|
eType = AB_STACK;
|
|
X = 1;
|
|
}
|
|
|
|
// Join checks only if it's not a jump target
|
|
if (!fJump && a->CPos > &a->Code[0])
|
|
{
|
|
// Join together stack operations
|
|
C4AulBCC *pCPos1 = a->CPos - 1;
|
|
if(eType == AB_STACK && pCPos1->bccType == AB_STACK &&
|
|
(X <= 0 || pCPos1->Par.i >= 0))
|
|
{
|
|
pCPos1->Par.i += X;
|
|
// Empty? Remove it.
|
|
if (!pCPos1->Par.i)
|
|
a->RemoveLastBCC();
|
|
return;
|
|
}
|
|
|
|
// Prune unneeded Incs / Decs
|
|
if(eType == AB_STACK && X < 0 && (pCPos1->bccType == AB_Inc || pCPos1->bccType == AB_Dec))
|
|
{
|
|
if(C4ScriptOpMap[pCPos1->Par.i].ResultModifier != pCPos1->bccType)
|
|
{
|
|
pCPos1->bccType = eType;
|
|
pCPos1->Par.i = X;
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
// If it was a result modifier, we can safely remove it knowing that it was neither
|
|
// the first chunk nor a jump target. We can therefore apply additional optimizations.
|
|
a->RemoveLastBCC();
|
|
pCPos1--;
|
|
}
|
|
}
|
|
|
|
// Join VARN_SET + STACK -1 to IVARN (equivalent)
|
|
if(eType == AB_STACK && X == -1 && pCPos1->bccType == AB_VARN_SET)
|
|
{
|
|
pCPos1->bccType = AB_IVARN;
|
|
return;
|
|
}
|
|
|
|
// Reduce some constructs like SUM + INT 1 to INC or DEC
|
|
if((eType == AB_Sum || eType == AB_Sub) &&
|
|
pCPos1->bccType == AB_INT &&
|
|
(pCPos1->Par.i == 1 || pCPos1->Par.i == -1))
|
|
{
|
|
if((pCPos1->Par.i > 0) == (eType == AB_Sum))
|
|
pCPos1->bccType = AB_Inc;
|
|
else
|
|
pCPos1->bccType = AB_Dec;
|
|
pCPos1->Par.i = X;
|
|
return;
|
|
}
|
|
|
|
}
|
|
|
|
// Add
|
|
a->AddBCC(eType, X, SPos);
|
|
|
|
// Reset jump flag
|
|
fJump = false;
|
|
}
|
|
|
|
void C4AulParseState::RemoveLastBCC()
|
|
{
|
|
// Security: This is unsafe on anything that might get optimized away
|
|
C4AulBCC *pBCC = a->CPos-1;
|
|
assert(pBCC->bccType != AB_STACK);
|
|
// Correct stack
|
|
iStack -= GetStackValue(pBCC->bccType, pBCC->Par.X);
|
|
// Remove
|
|
a->RemoveLastBCC();
|
|
}
|
|
|
|
C4V_Type C4AulParseState::GetLastRetType(C4V_Type to)
|
|
{
|
|
C4V_Type from;
|
|
switch ((a->CPos-1)->bccType)
|
|
{
|
|
case AB_INT: from = Config.Developer.ExtraWarnings || (a->CPos-1)->Par.i ? C4V_Int : C4V_Any; break;
|
|
case AB_STRING: from = C4V_String; break;
|
|
case AB_NEW_ARRAY: case AB_CARRAY: case AB_ARRAY_SLICE: from = C4V_Array; break;
|
|
case AB_NEW_PROPLIST: case AB_CPROPLIST: from = C4V_PropList; break;
|
|
case AB_BOOL: from = C4V_Bool; break;
|
|
case AB_FUNC:
|
|
from = (a->CPos-1)->Par.f->GetRetType(); break;
|
|
case AB_CALL: case AB_CALLFS:
|
|
{
|
|
C4String * pName = (a->CPos-1)->Par.s;
|
|
C4AulFunc * pFunc2 = a->Engine->GetFirstFunc(pName->GetCStr());
|
|
bool allwarn = true;
|
|
from = C4V_Any;
|
|
while (pFunc2 && allwarn)
|
|
{
|
|
from = pFunc2->GetRetType();
|
|
if (!C4Value::WarnAboutConversion(from, to))
|
|
{
|
|
allwarn = false;
|
|
from = C4V_Any;
|
|
}
|
|
pFunc2 = a->Engine->GetNextSNFunc(pFunc2);
|
|
}
|
|
break;
|
|
}
|
|
case AB_Inc: case AB_Dec: case AB_BitNot: case AB_Neg:
|
|
case AB_Pow: case AB_Div: case AB_Mul: case AB_Mod: case AB_Sub: case AB_Sum:
|
|
case AB_LeftShift: case AB_RightShift: case AB_BitAnd: case AB_BitXOr: case AB_BitOr:
|
|
from = C4V_Int; break;
|
|
case AB_Not: case AB_LessThan: case AB_LessThanEqual: case AB_GreaterThan: case AB_GreaterThanEqual: case AB_Equal: case AB_NotEqual:
|
|
from = C4V_Bool; break;
|
|
default:
|
|
from = C4V_Any; break;
|
|
}
|
|
return from;
|
|
}
|
|
|
|
C4AulBCC C4AulParseState::MakeSetter(bool fLeaveValue)
|
|
{
|
|
if(Type != PARSER) { C4AulBCC Dummy; Dummy.bccType = AB_ERR; return Dummy; }
|
|
C4AulBCC Value = *(a->CPos - 1), Setter = Value;
|
|
// Check type
|
|
switch (Value.bccType)
|
|
{
|
|
case AB_ARRAYA: Setter.bccType = AB_ARRAYA_SET; break;
|
|
case AB_ARRAY_SLICE: Setter.bccType = AB_ARRAY_SLICE_SET; break;
|
|
case AB_PARN: Setter.bccType = AB_PARN_SET; break;
|
|
case AB_VARN: Setter.bccType = AB_VARN_SET; break;
|
|
case AB_LOCALN:
|
|
Setter.bccType = AB_LOCALN_SET;
|
|
Setter.Par.s->IncRef(); // so string isn't dropped by RemoveLastBCC, see also C4AulScript::AddBCC
|
|
break;
|
|
case AB_PROP:
|
|
Setter.bccType = AB_PROP_SET;
|
|
Setter.Par.s->IncRef(); // so string isn't dropped by RemoveLastBCC, see also C4AulScript::AddBCC
|
|
break;
|
|
case AB_GLOBALN: Setter.bccType = AB_GLOBALN_SET; break;
|
|
default:
|
|
throw new C4AulParseError(this, "assignment to a constant");
|
|
}
|
|
// Remove value BCC
|
|
RemoveLastBCC();
|
|
// Want the value?
|
|
if(fLeaveValue)
|
|
{
|
|
// Duplicate parameters on stack
|
|
// (all push one value on the stack as result, so we have -(N-1) parameters)
|
|
int iParCount = -GetStackValue(Value.bccType, Value.Par.X) + 1;
|
|
for(int i = 0; i < iParCount; i++)
|
|
AddBCC(AB_DUP, iParCount);
|
|
// Finally re-add original BCC
|
|
AddBCC(Value.bccType, Value.Par.X);
|
|
}
|
|
// Done. The returned BCC should be added later once the value to be set was pushed on top.
|
|
assert(GetStackValue(Value.bccType, Value.Par.X) == GetStackValue(Setter.bccType, Setter.Par.X)+1);
|
|
return Setter;
|
|
}
|
|
|
|
int C4AulParseState::JumpHere()
|
|
{
|
|
// Set flag so the next generated code chunk won't get joined
|
|
fJump = true;
|
|
return a->GetCodePos();
|
|
}
|
|
|
|
static bool IsJump(C4AulBCCType t)
|
|
{
|
|
return t == AB_JUMP || t == AB_JUMPAND || t == AB_JUMPOR || t == AB_CONDN || t == AB_COND;
|
|
}
|
|
|
|
void C4AulParseState::SetJumpHere(int iJumpOp)
|
|
{
|
|
if (Type != PARSER) return;
|
|
// Set target
|
|
C4AulBCC *pBCC = a->GetCodeByPos(iJumpOp);
|
|
assert(IsJump(pBCC->bccType));
|
|
pBCC->Par.i = a->GetCodePos() - iJumpOp;
|
|
// Set flag so the next generated code chunk won't get joined
|
|
fJump = true;
|
|
}
|
|
|
|
void C4AulParseState::SetJump(int iJumpOp, int iWhere)
|
|
{
|
|
if (Type != PARSER) return;
|
|
// Set target
|
|
C4AulBCC *pBCC = a->GetCodeByPos(iJumpOp);
|
|
assert(IsJump(pBCC->bccType));
|
|
pBCC->Par.i = iWhere - iJumpOp;
|
|
}
|
|
|
|
void C4AulParseState::AddJump(C4AulBCCType eType, int iWhere)
|
|
{
|
|
AddBCC(eType, iWhere - a->GetCodePos());
|
|
}
|
|
|
|
void C4AulParseState::PushLoop()
|
|
{
|
|
if (Type != PARSER) return;
|
|
Loop *pNew = new Loop();
|
|
pNew->StackSize = iStack;
|
|
pNew->Controls = NULL;
|
|
pNew->Next = pLoopStack;
|
|
pLoopStack = pNew;
|
|
}
|
|
|
|
void C4AulParseState::PopLoop()
|
|
{
|
|
if (Type != PARSER) return;
|
|
// Delete loop controls
|
|
Loop *pLoop = pLoopStack;
|
|
while (pLoop->Controls)
|
|
{
|
|
// Unlink
|
|
Loop::Control *pCtrl = pLoop->Controls;
|
|
pLoop->Controls = pCtrl->Next;
|
|
// Delete
|
|
delete pCtrl;
|
|
}
|
|
// Unlink & delete
|
|
pLoopStack = pLoop->Next;
|
|
delete pLoop;
|
|
}
|
|
|
|
void C4AulParseState::AddLoopControl(bool fBreak)
|
|
{
|
|
if (Type != PARSER) return;
|
|
Loop::Control *pNew = new Loop::Control();
|
|
pNew->Break = fBreak;
|
|
pNew->Pos = a->GetCodePos();
|
|
pNew->Next = pLoopStack->Controls;
|
|
pLoopStack->Controls = pNew;
|
|
}
|
|
|
|
const char * C4AulParseState::GetTokenName(C4AulTokenType TokenType)
|
|
{
|
|
switch (TokenType)
|
|
{
|
|
case ATT_INVALID: return "invalid token";
|
|
case ATT_DIR: return "directive";
|
|
case ATT_IDTF: return "identifier";
|
|
case ATT_INT: return "integer constant";
|
|
case ATT_STRING: return "string constant";
|
|
case ATT_DOT: return "'.'";
|
|
case ATT_COMMA: return "','";
|
|
case ATT_COLON: return "':'";
|
|
case ATT_SCOLON: return "';'";
|
|
case ATT_BOPEN: return "'('";
|
|
case ATT_BCLOSE: return "')'";
|
|
case ATT_BOPEN2: return "'['";
|
|
case ATT_BCLOSE2: return "']'";
|
|
case ATT_BLOPEN: return "'{'";
|
|
case ATT_BLCLOSE: return "'}'";
|
|
case ATT_CALL: return "'->'";
|
|
case ATT_CALLFS: return "'->~'";
|
|
case ATT_STAR: return "'*'";
|
|
case ATT_LDOTS: return "'...'";
|
|
case ATT_SET: return "'='";
|
|
case ATT_OPERATOR: return "operator";
|
|
case ATT_EOF: return "end of file";
|
|
default: return "unrecognized token";
|
|
}
|
|
}
|
|
|
|
void C4AulParseState::Shift(OperatorPolicy Operator)
|
|
{
|
|
TokenType = GetNextToken(Operator);
|
|
}
|
|
void C4AulParseState::Match(C4AulTokenType RefTokenType, const char * Message)
|
|
{
|
|
if (TokenType != RefTokenType)
|
|
// error
|
|
throw new C4AulParseError(this, Message ? Message :
|
|
FormatString("%s expected, but found %s", GetTokenName(RefTokenType), GetTokenName(TokenType)).getData());
|
|
Shift();
|
|
}
|
|
void C4AulParseState::UnexpectedToken(const char * Expected)
|
|
{
|
|
throw new C4AulParseError(this, FormatString("%s expected, but found %s", Expected, GetTokenName(TokenType)).getData());
|
|
}
|
|
|
|
void C4AulScript::ParseFn(C4AulScriptFunc *Fn, bool fExprOnly, C4AulScriptContext* context)
|
|
{
|
|
// check if fn overloads other fn (all func tables are built now)
|
|
// *MUST* check Fn->Owner-list, because it may be the engine (due to linked globals)
|
|
if ((Fn->OwnerOverloaded = Fn->Owner->GetOverloadedFunc(Fn)))
|
|
if (Fn->Owner == Fn->OwnerOverloaded->Owner)
|
|
Fn->OwnerOverloaded->OverloadedBy=Fn;
|
|
// store byte code pos
|
|
// (relative position to code start; code pointer may change while
|
|
// parsing)
|
|
assert(Fn->GetCodeOwner() == this);
|
|
Fn->CodePos = CPos - &Code[0];
|
|
// parse
|
|
C4AulParseState state(Fn, this, C4AulParseState::PARSER);
|
|
state.ContextToExecIn = context;
|
|
// get first token
|
|
state.Shift();
|
|
if (!fExprOnly)
|
|
state.Parse_Function();
|
|
else
|
|
{
|
|
state.Parse_Expression();
|
|
AddBCC(AB_RETURN, 0, state.SPos);
|
|
}
|
|
// done
|
|
return;
|
|
}
|
|
|
|
void C4AulParseState::Parse_Script()
|
|
{
|
|
int IncludeCount = 0;
|
|
bool fDone = false;
|
|
const char * SPos0 = SPos;
|
|
bool all_ok = true;
|
|
bool found_code = false;
|
|
while (!fDone) try
|
|
{
|
|
// Go to the next token if the current token could not be processed or no token has yet been parsed
|
|
if (SPos == SPos0)
|
|
{
|
|
Shift();
|
|
}
|
|
SPos0 = SPos;
|
|
switch (TokenType)
|
|
{
|
|
case ATT_DIR:
|
|
{
|
|
if (found_code)
|
|
Warn(FormatString("Found %s after declarations", Idtf).getData());
|
|
// check for include statement
|
|
if (SEqual(Idtf, C4AUL_Include))
|
|
{
|
|
Shift();
|
|
// get id of script to include
|
|
if (TokenType != ATT_IDTF)
|
|
UnexpectedToken("identifier");
|
|
C4ID Id = C4ID(StdStrBuf(Idtf));
|
|
Shift();
|
|
// add to include list
|
|
a->Includes.push_front(Id);
|
|
IncludeCount++;
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Append))
|
|
{
|
|
// for #appendto * '*' needs to be ATT_STAR, not an operator.
|
|
Shift(StarsPlease);
|
|
// get id of script to include/append
|
|
C4ID Id;
|
|
switch (TokenType)
|
|
{
|
|
case ATT_IDTF:
|
|
Id = C4ID(StdStrBuf(Idtf));
|
|
Shift();
|
|
break;
|
|
case ATT_STAR: // "*"
|
|
Id = C4ID::None;
|
|
Shift();
|
|
break;
|
|
default:
|
|
// -> ID expected
|
|
UnexpectedToken("identifier or '*'");
|
|
}
|
|
// add to append list
|
|
a->Appends.push_back(Id);
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Strict))
|
|
{
|
|
// declare it as strict
|
|
a->Strict = C4AulScript::STRICT1;
|
|
Shift();
|
|
if (TokenType == ATT_INT)
|
|
{
|
|
if (cInt == 2)
|
|
a->Strict = C4AulScript::STRICT2;
|
|
else
|
|
throw new C4AulParseError(this, "unknown strict level");
|
|
Shift();
|
|
}
|
|
}
|
|
else
|
|
// -> unknown directive
|
|
throw new C4AulParseError(this, "unknown directive: ", Idtf);
|
|
break;
|
|
}
|
|
case ATT_IDTF:
|
|
{
|
|
found_code = true;
|
|
if (SEqual(Idtf, C4AUL_For))
|
|
{
|
|
throw new C4AulParseError(this, "unexpected for outside function");
|
|
}
|
|
// check for variable definition (var)
|
|
else if (SEqual(Idtf, C4AUL_VarNamed))
|
|
{
|
|
throw new C4AulParseError(this, "unexpected variable definition outside function");
|
|
}
|
|
// check for object-local variable definition (local)
|
|
else if (SEqual(Idtf, C4AUL_LocalNamed))
|
|
{
|
|
Shift();
|
|
Parse_Local();
|
|
Match(ATT_SCOLON);
|
|
break;
|
|
}
|
|
// check for variable definition (static)
|
|
else if (SEqual(Idtf, C4AUL_GlobalNamed))
|
|
{
|
|
Shift();
|
|
// constant?
|
|
if (TokenType == ATT_IDTF && SEqual(Idtf, C4AUL_Const))
|
|
{
|
|
Shift();
|
|
Parse_Const();
|
|
}
|
|
else
|
|
Parse_Static();
|
|
Match(ATT_SCOLON);
|
|
break;
|
|
}
|
|
else
|
|
Parse_FuncHead();
|
|
break;
|
|
}
|
|
case ATT_EOF:
|
|
fDone = true;
|
|
break;
|
|
default:
|
|
UnexpectedToken("declaration");
|
|
}
|
|
all_ok = true;
|
|
}
|
|
catch (C4AulError *err)
|
|
{
|
|
// damn! something went wrong, print it out
|
|
// but only one error per function
|
|
if (all_ok)
|
|
err->show();
|
|
all_ok = false;
|
|
delete err;
|
|
}
|
|
}
|
|
|
|
void C4AulParseState::Parse_FuncHead()
|
|
{
|
|
C4AulAccess Acc = AA_PUBLIC;
|
|
// Access?
|
|
if (SEqual(Idtf, C4AUL_Private)) { Acc = AA_PRIVATE; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_Protected)) { Acc = AA_PROTECTED; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_Public)) { Acc = AA_PUBLIC; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_Global)) { Acc = AA_GLOBAL; Shift(); }
|
|
// check for func declaration
|
|
if (SEqual(Idtf, C4AUL_Func))
|
|
{
|
|
Shift();
|
|
// get next token, must be func name
|
|
if (TokenType != ATT_IDTF)
|
|
UnexpectedToken("function name");
|
|
// check: symbol already in use?
|
|
switch (Acc)
|
|
{
|
|
case AA_PRIVATE:
|
|
case AA_PROTECTED:
|
|
case AA_PUBLIC:
|
|
if (a->LocalNamed.GetItemNr(Idtf) != -1)
|
|
throw new C4AulParseError(this, "function definition: name already in use (local variable)");
|
|
if (a->Def)
|
|
break;
|
|
// func in global context: fallthru
|
|
case AA_GLOBAL:
|
|
if (a->Engine->GlobalNamedNames.GetItemNr(Idtf) != -1)
|
|
throw new C4AulParseError(this, "function definition: name already in use (global variable)");
|
|
if (a->Engine->GlobalConstNames.GetItemNr(Idtf) != -1)
|
|
Error("function definition: name already in use (global constant)", 0);
|
|
}
|
|
// create script fn
|
|
if (Acc == AA_GLOBAL)
|
|
{
|
|
// global func
|
|
Fn = new C4AulScriptFunc(a->Engine, Idtf);
|
|
C4AulFunc *FnLink = new C4AulFunc(a, NULL);
|
|
FnLink->LinkedTo = Fn; Fn->LinkedTo = FnLink;
|
|
Acc = AA_PUBLIC;
|
|
}
|
|
else
|
|
{
|
|
// normal, local func
|
|
Fn = new C4AulScriptFunc(a, Idtf);
|
|
}
|
|
// set up func (in the case we got an error)
|
|
Fn->Script = SPos; // temporary
|
|
Fn->Access = Acc; Fn->pOrgScript = a;
|
|
Shift();
|
|
// expect an opening bracket now
|
|
if (TokenType != ATT_BOPEN)
|
|
UnexpectedToken("'('");
|
|
Shift();
|
|
// get pars
|
|
Fn->ParNamed.Reset(); // safety :)
|
|
int cpar = 0;
|
|
while (1)
|
|
{
|
|
// closing bracket?
|
|
if (TokenType == ATT_BCLOSE)
|
|
{
|
|
Fn->Script = SPos;
|
|
Shift();
|
|
// end of params
|
|
break;
|
|
}
|
|
// too many parameters?
|
|
if (cpar >= C4AUL_MAX_Par)
|
|
throw new C4AulParseError(this, "'func' parameter list: too many parameters (max 10)");
|
|
// must be a name or type now
|
|
if (TokenType != ATT_IDTF)
|
|
{
|
|
UnexpectedToken("parameter or closing bracket");
|
|
}
|
|
// type identifier?
|
|
if (SEqual(Idtf, C4AUL_TypeInt)) { Fn->ParType[cpar] = C4V_Int; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeBool)) { Fn->ParType[cpar] = C4V_Bool; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeC4ID)) { Fn->ParType[cpar] = C4V_PropList; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeC4Object)) { Fn->ParType[cpar] = C4V_C4Object; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypePropList)) { Fn->ParType[cpar] = C4V_PropList; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeString)) { Fn->ParType[cpar] = C4V_String; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeArray)) { Fn->ParType[cpar] = C4V_Array; Shift(); }
|
|
if (TokenType != ATT_IDTF)
|
|
{
|
|
UnexpectedToken("parameter name");
|
|
}
|
|
else
|
|
{
|
|
Fn->ParNamed.AddName(Idtf);
|
|
Shift();
|
|
}
|
|
// end of params?
|
|
if (TokenType == ATT_BCLOSE)
|
|
{
|
|
Fn->Script = SPos;
|
|
Shift();
|
|
break;
|
|
}
|
|
// must be a comma now
|
|
if (TokenType != ATT_COMMA)
|
|
UnexpectedToken("comma or closing bracket");
|
|
Shift();
|
|
cpar++;
|
|
}
|
|
Fn->Script = SPos;
|
|
Match(ATT_BLOPEN);
|
|
Parse_Desc();
|
|
Parse_Function();
|
|
Match(ATT_BLCLOSE);
|
|
return;
|
|
}
|
|
throw new C4AulParseError(this, "Declaration expected, but found identifier ", Idtf);
|
|
}
|
|
|
|
void C4AulParseState::Parse_Desc()
|
|
{
|
|
// check for function desc
|
|
if (TokenType == ATT_BOPEN2)
|
|
{
|
|
// parse for end of desc
|
|
const char *SPos0 = SPos;
|
|
int Len = 0;
|
|
int iBracketsOpen = 1;
|
|
while (true)
|
|
{
|
|
// another bracket open
|
|
if (*SPos == '[') iBracketsOpen++;
|
|
// a bracket closed
|
|
if (*SPos == ']') iBracketsOpen--;
|
|
// last bracket closed: at end of desc block
|
|
if (iBracketsOpen == 0) break;
|
|
// check for eof
|
|
if (!*SPos)
|
|
// -> function desc not closed
|
|
throw new C4AulParseError(this, "function desc not closed");
|
|
// next char
|
|
SPos++; Len++;
|
|
}
|
|
SPos++;
|
|
// extract desc
|
|
Fn->Desc.Copy(SPos0, Len);
|
|
Fn->Script = SPos;
|
|
Shift();
|
|
}
|
|
else
|
|
Fn->Desc.Clear();
|
|
}
|
|
|
|
void C4AulParseState::Parse_Function()
|
|
{
|
|
iStack = 0;
|
|
Done = false;
|
|
while (!Done) switch (TokenType)
|
|
{
|
|
// a block end?
|
|
case ATT_BLCLOSE:
|
|
{
|
|
// all ok, insert a return
|
|
C4AulBCC * CPos = a->GetCodeByPos(Max(a->GetCodePos() - 1,0));
|
|
if (!CPos || CPos->bccType != AB_RETURN || fJump)
|
|
{
|
|
if (C4AulDebug::GetDebugger())
|
|
AddBCC(AB_DEBUG);
|
|
AddBCC(AB_NIL);
|
|
AddBCC(AB_RETURN);
|
|
}
|
|
// and break
|
|
Done = true;
|
|
// Do not blame this function for script errors between functions
|
|
Fn = 0;
|
|
return;
|
|
}
|
|
case ATT_EOF:
|
|
{
|
|
Done = true;
|
|
return;
|
|
}
|
|
default:
|
|
{
|
|
Parse_Statement();
|
|
assert(!iStack);
|
|
}
|
|
}
|
|
}
|
|
|
|
void C4AulParseState::Parse_Block()
|
|
{
|
|
Match(ATT_BLOPEN);
|
|
// insert block in byte code
|
|
while (1) switch (TokenType)
|
|
{
|
|
case ATT_BLCLOSE:
|
|
Shift();
|
|
return;
|
|
default:
|
|
{
|
|
Parse_Statement();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void C4AulParseState::Parse_Statement()
|
|
{
|
|
if (C4AulDebug::GetDebugger())
|
|
AddBCC(AB_DEBUG);
|
|
switch (TokenType)
|
|
{
|
|
// do we have a block start?
|
|
case ATT_BLOPEN:
|
|
{
|
|
Parse_Block();
|
|
return;
|
|
}
|
|
case ATT_BOPEN:
|
|
case ATT_BOPEN2:
|
|
case ATT_SET:
|
|
case ATT_OPERATOR:
|
|
case ATT_INT:
|
|
case ATT_STRING:
|
|
{
|
|
Parse_Expression();
|
|
AddBCC(AB_STACK, -1);
|
|
Match(ATT_SCOLON);
|
|
return;
|
|
}
|
|
// additional function separator
|
|
case ATT_SCOLON:
|
|
{
|
|
Shift();
|
|
break;
|
|
}
|
|
case ATT_IDTF:
|
|
{
|
|
// check for variable definition (var)
|
|
if (SEqual(Idtf, C4AUL_VarNamed))
|
|
{
|
|
Shift();
|
|
Parse_Var();
|
|
}
|
|
// check for variable definition (local)
|
|
else if (SEqual(Idtf, C4AUL_LocalNamed))
|
|
{
|
|
Shift();
|
|
Parse_Local();
|
|
}
|
|
// check for variable definition (static)
|
|
else if (SEqual(Idtf, C4AUL_GlobalNamed))
|
|
{
|
|
Shift();
|
|
Parse_Static();
|
|
}
|
|
// check new-form func begin
|
|
else if (SEqual(Idtf, C4AUL_Func) ||
|
|
SEqual(Idtf, C4AUL_Private) ||
|
|
SEqual(Idtf, C4AUL_Protected) ||
|
|
SEqual(Idtf, C4AUL_Public) ||
|
|
SEqual(Idtf, C4AUL_Global))
|
|
{
|
|
throw new C4AulParseError(this, "unexpected end of function");
|
|
}
|
|
// get function by identifier: first check special functions
|
|
else if (SEqual(Idtf, C4AUL_If)) // if
|
|
{
|
|
Shift();
|
|
Parse_If();
|
|
break;
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Else)) // else
|
|
{
|
|
throw new C4AulParseError(this, "misplaced 'else'");
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Do)) // while
|
|
{
|
|
Shift();
|
|
Parse_DoWhile();
|
|
break;
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_While)) // while
|
|
{
|
|
Shift();
|
|
Parse_While();
|
|
break;
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_For)) // for
|
|
{
|
|
Shift();
|
|
// Look if it's the for([var] foo in array)-form
|
|
const char * SPos0 = SPos;
|
|
// must be followed by a bracket
|
|
Match(ATT_BOPEN);
|
|
// optional var
|
|
if (TokenType == ATT_IDTF && SEqual(Idtf, C4AUL_VarNamed))
|
|
Shift();
|
|
// variable and "in"
|
|
if (TokenType == ATT_IDTF /*&& (iVarID = Fn->VarNamed.GetItemNr(Idtf)) != -1*/
|
|
&& GetNextToken() == ATT_IDTF
|
|
&& SEqual(Idtf, C4AUL_In))
|
|
{
|
|
// reparse the stuff in the brackets like normal statements
|
|
SPos = SPos0;
|
|
Shift();
|
|
Parse_ForEach();
|
|
}
|
|
else
|
|
{
|
|
// reparse the stuff in the brackets like normal statements
|
|
SPos = SPos0;
|
|
Shift();
|
|
Parse_For();
|
|
}
|
|
break;
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Return)) // return
|
|
{
|
|
Shift();
|
|
if (TokenType == ATT_SCOLON)
|
|
{
|
|
// allow return; without return value (implies nil)
|
|
AddBCC(AB_NIL);
|
|
}
|
|
else
|
|
{
|
|
// return retval;
|
|
Parse_Expression();
|
|
}
|
|
AddBCC(AB_RETURN);
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Break)) // break
|
|
{
|
|
Shift();
|
|
if (Type == PARSER)
|
|
{
|
|
// Must be inside a loop
|
|
if (!pLoopStack)
|
|
{
|
|
Error("'break' is only allowed inside loops");
|
|
}
|
|
else
|
|
{
|
|
// Insert code
|
|
if (pLoopStack->StackSize != iStack)
|
|
AddBCC(AB_STACK, pLoopStack->StackSize - iStack);
|
|
AddLoopControl(true);
|
|
AddBCC(AB_JUMP);
|
|
}
|
|
}
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Continue)) // continue
|
|
{
|
|
Shift();
|
|
if (Type == PARSER)
|
|
{
|
|
// Must be inside a loop
|
|
if (!pLoopStack)
|
|
{
|
|
Error("'continue' is only allowed inside loops");
|
|
}
|
|
else
|
|
{
|
|
// Insert code
|
|
if (pLoopStack->StackSize != iStack)
|
|
AddBCC(AB_STACK, pLoopStack->StackSize - iStack);
|
|
AddLoopControl(false);
|
|
AddBCC(AB_JUMP);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Parse_Expression();
|
|
AddBCC(AB_STACK, -1);
|
|
}
|
|
Match(ATT_SCOLON);
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
// -> unexpected token
|
|
UnexpectedToken("statement");
|
|
}
|
|
}
|
|
}
|
|
|
|
int C4AulParseState::Parse_Params(int iMaxCnt, const char * sWarn, C4AulFunc * pFunc)
|
|
{
|
|
int size = 0;
|
|
// so it's a regular function; force "("
|
|
Match(ATT_BOPEN);
|
|
bool fDone = false;
|
|
do
|
|
switch (TokenType)
|
|
{
|
|
case ATT_BCLOSE:
|
|
{
|
|
Shift();
|
|
// () -> size 0, (*,) -> size 2, (*,*,) -> size 3
|
|
if (size > 0)
|
|
{
|
|
if (sWarn && Config.Developer.ExtraWarnings)
|
|
Warn(FormatString("parameter %d of call to %s is empty", size, sWarn).getData(), NULL);
|
|
AddBCC(AB_NIL);
|
|
++size;
|
|
}
|
|
fDone = true;
|
|
break;
|
|
}
|
|
case ATT_COMMA:
|
|
{
|
|
// got no parameter before a ","? then push a 0-constant
|
|
if (sWarn && Config.Developer.ExtraWarnings)
|
|
Warn(FormatString("parameter %d of call to %s is empty", size, sWarn).getData(), NULL);
|
|
AddBCC(AB_NIL);
|
|
Shift();
|
|
++size;
|
|
break;
|
|
}
|
|
case ATT_LDOTS:
|
|
{
|
|
Shift();
|
|
// Push all unnamed parameters of the current function as parameters
|
|
int i = Fn->ParNamed.iSize;
|
|
while (size < iMaxCnt && i < C4AUL_MAX_Par)
|
|
{
|
|
AddBCC(AB_PARN, i);
|
|
++i;
|
|
++size;
|
|
}
|
|
// Do not allow more parameters even if there is place left
|
|
fDone = true;
|
|
Match(ATT_BCLOSE);
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
// get a parameter
|
|
Parse_Expression();
|
|
if (pFunc && (Type == PARSER) && size < iMaxCnt)
|
|
{
|
|
C4V_Type to = pFunc->GetParType()[size];
|
|
// pFunc either is the return value from a GetFirstFunc-Call or
|
|
// the only function that could be called. When in doubt, don't warn.
|
|
C4AulFunc * pFunc2 = pFunc;
|
|
while ((pFunc2 = a->Engine->GetNextSNFunc(pFunc2)))
|
|
if (pFunc2->GetParType()[size] != to) to = C4V_Any;
|
|
C4V_Type from = GetLastRetType(to);
|
|
if (C4Value::WarnAboutConversion(from, to))
|
|
{
|
|
Warn(FormatString("parameter %d of call to %s is %s instead of %s", size, sWarn, GetC4VName(from), GetC4VName(to)).getData(), NULL);
|
|
}
|
|
}
|
|
++size;
|
|
// end of parameter list?
|
|
if (TokenType == ATT_COMMA)
|
|
Shift();
|
|
else if (TokenType == ATT_BCLOSE)
|
|
{
|
|
Shift();
|
|
fDone = true;
|
|
}
|
|
else UnexpectedToken("',' or ')'");
|
|
break;
|
|
}
|
|
}
|
|
while (!fDone);
|
|
// too many parameters?
|
|
if (sWarn && size > iMaxCnt && Type == PARSER)
|
|
Warn(FormatString("call to %s gives %d parameters, but only %d are used", sWarn, size, iMaxCnt).getData(), NULL);
|
|
// Balance stack
|
|
if (size != iMaxCnt)
|
|
AddBCC(AB_STACK, iMaxCnt - size);
|
|
return size;
|
|
}
|
|
|
|
void C4AulParseState::Parse_Array()
|
|
{
|
|
// force "["
|
|
Match(ATT_BOPEN2);
|
|
// Create an array
|
|
int size = 0;
|
|
bool fDone = false;
|
|
do
|
|
switch (TokenType)
|
|
{
|
|
case ATT_BCLOSE2:
|
|
{
|
|
Shift();
|
|
// [] -> size 0, [*,] -> size 2, [*,*,] -> size 3
|
|
if (size > 0)
|
|
{
|
|
if (Config.Developer.ExtraWarnings)
|
|
Warn(FormatString("array entry %d is empty", size).getData(), NULL);
|
|
AddBCC(AB_NIL);
|
|
++size;
|
|
}
|
|
fDone = true;
|
|
break;
|
|
}
|
|
case ATT_COMMA:
|
|
{
|
|
// got no parameter before a ","? then push nil
|
|
if (Config.Developer.ExtraWarnings)
|
|
Warn(FormatString("array entry %d is empty", size).getData(), NULL);
|
|
AddBCC(AB_NIL);
|
|
Shift();
|
|
++size;
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
Parse_Expression();
|
|
++size;
|
|
if (TokenType == ATT_COMMA)
|
|
Shift();
|
|
else if (TokenType == ATT_BCLOSE2)
|
|
{
|
|
Shift();
|
|
fDone = true;
|
|
break;
|
|
}
|
|
else
|
|
UnexpectedToken("',' or ']'");
|
|
}
|
|
}
|
|
while (!fDone);
|
|
// add terminator
|
|
AddBCC(AB_NEW_ARRAY, size);
|
|
}
|
|
|
|
void C4AulParseState::Parse_PropList()
|
|
{
|
|
Shift();
|
|
int size = 0;
|
|
// insert block in byte code
|
|
while (TokenType != ATT_BLCLOSE)
|
|
{
|
|
C4String * pKey;
|
|
if (TokenType == ATT_IDTF)
|
|
{
|
|
pKey = Strings.RegString(Idtf);
|
|
AddBCC(AB_STRING, (intptr_t) pKey);
|
|
Shift();
|
|
}
|
|
else if (TokenType == ATT_STRING)
|
|
{
|
|
AddBCC(AB_STRING, reinterpret_cast<intptr_t>(cStr));
|
|
Shift();
|
|
}
|
|
else UnexpectedToken("string or identifier");
|
|
if (TokenType != ATT_COLON && TokenType != ATT_SET)
|
|
UnexpectedToken("':' or '='");
|
|
Shift();
|
|
Parse_Expression();
|
|
++size;
|
|
if (TokenType == ATT_COMMA)
|
|
Shift();
|
|
else if (TokenType != ATT_BLCLOSE)
|
|
UnexpectedToken("'}' or ','");
|
|
}
|
|
AddBCC(AB_NEW_PROPLIST, size);
|
|
Shift();
|
|
}
|
|
|
|
void C4AulParseState::Parse_DoWhile()
|
|
{
|
|
// Save position for later jump back
|
|
int iStart = JumpHere();
|
|
// We got a loop
|
|
PushLoop();
|
|
// Execute body
|
|
Parse_Statement();
|
|
// Execute condition
|
|
if (TokenType != ATT_IDTF || !SEqual(Idtf, C4AUL_While))
|
|
UnexpectedToken("'while'");
|
|
Shift();
|
|
Match(ATT_BOPEN);
|
|
Parse_Expression();
|
|
Match(ATT_BCLOSE);
|
|
// Jump back
|
|
AddJump(AB_COND, iStart);
|
|
if (Type != PARSER) return;
|
|
// Set targets for break/continue
|
|
for (Loop::Control *pCtrl = pLoopStack->Controls; pCtrl; pCtrl = pCtrl->Next)
|
|
if (pCtrl->Break)
|
|
SetJumpHere(pCtrl->Pos);
|
|
else
|
|
SetJump(pCtrl->Pos, iStart);
|
|
PopLoop();
|
|
}
|
|
|
|
void C4AulParseState::Parse_While()
|
|
{
|
|
// Save position for later jump back
|
|
int iStart = JumpHere();
|
|
// Execute condition
|
|
Match(ATT_BOPEN);
|
|
Parse_Expression();
|
|
Match(ATT_BCLOSE);
|
|
// Check condition
|
|
int iCond = a->GetCodePos();
|
|
AddBCC(AB_CONDN);
|
|
// We got a loop
|
|
PushLoop();
|
|
// Execute body
|
|
Parse_Statement();
|
|
if (Type != PARSER) return;
|
|
// Jump back
|
|
AddJump(AB_JUMP, iStart);
|
|
// Set target for conditional jump
|
|
SetJumpHere(iCond);
|
|
// Set targets for break/continue
|
|
for (Loop::Control *pCtrl = pLoopStack->Controls; pCtrl; pCtrl = pCtrl->Next)
|
|
if (pCtrl->Break)
|
|
SetJumpHere(pCtrl->Pos);
|
|
else
|
|
SetJump(pCtrl->Pos, iStart);
|
|
PopLoop();
|
|
}
|
|
|
|
void C4AulParseState::Parse_If()
|
|
{
|
|
Match(ATT_BOPEN);
|
|
Parse_Expression();
|
|
Match(ATT_BCLOSE);
|
|
// create bytecode, remember position
|
|
int iCond = a->GetCodePos();
|
|
AddBCC(AB_CONDN);
|
|
// parse controlled statement
|
|
Parse_Statement();
|
|
if (TokenType == ATT_IDTF && SEqual(Idtf, C4AUL_Else))
|
|
{
|
|
// add jump
|
|
int iJump = a->GetCodePos();
|
|
AddBCC(AB_JUMP);
|
|
// set condition jump target
|
|
SetJumpHere(iCond);
|
|
Shift();
|
|
// expect a command now
|
|
Parse_Statement();
|
|
// set jump target
|
|
SetJumpHere(iJump);
|
|
}
|
|
else
|
|
// set condition jump target
|
|
SetJumpHere(iCond);
|
|
}
|
|
|
|
void C4AulParseState::Parse_For()
|
|
{
|
|
// Initialization
|
|
if (TokenType == ATT_IDTF && SEqual(Idtf, C4AUL_VarNamed))
|
|
{
|
|
Shift();
|
|
Parse_Var();
|
|
}
|
|
else if (TokenType != ATT_SCOLON)
|
|
{
|
|
Parse_Expression();
|
|
AddBCC(AB_STACK, -1);
|
|
}
|
|
// Consume first semicolon
|
|
Match(ATT_SCOLON);
|
|
// Condition
|
|
int iCondition = -1, iJumpBody = -1, iJumpOut = -1;
|
|
if (TokenType != ATT_SCOLON)
|
|
{
|
|
// Add condition code
|
|
iCondition = JumpHere();
|
|
Parse_Expression();
|
|
// Jump out
|
|
iJumpOut = a->GetCodePos();
|
|
AddBCC(AB_CONDN);
|
|
}
|
|
// Consume second semicolon
|
|
Match(ATT_SCOLON);
|
|
// Incrementor
|
|
int iIncrementor = -1;
|
|
if (TokenType != ATT_BCLOSE)
|
|
{
|
|
// Must jump over incrementor
|
|
iJumpBody = a->GetCodePos();
|
|
AddBCC(AB_JUMP);
|
|
// Add incrementor code
|
|
iIncrementor = JumpHere();
|
|
Parse_Expression();
|
|
AddBCC(AB_STACK, -1);
|
|
// Jump to condition
|
|
if (iCondition != -1)
|
|
AddJump(AB_JUMP, iCondition);
|
|
}
|
|
// Consume closing bracket
|
|
Match(ATT_BCLOSE);
|
|
// Allow break/continue from now on
|
|
PushLoop();
|
|
// Body
|
|
int iBody = JumpHere();
|
|
if (iJumpBody != -1)
|
|
SetJumpHere(iJumpBody);
|
|
Parse_Statement();
|
|
if (Type != PARSER) return;
|
|
// Where to jump back?
|
|
int iJumpBack;
|
|
if (iIncrementor != -1)
|
|
iJumpBack = iIncrementor;
|
|
else if (iCondition != -1)
|
|
iJumpBack = iCondition;
|
|
else
|
|
iJumpBack = iBody;
|
|
AddJump(AB_JUMP, iJumpBack);
|
|
// Set target for condition
|
|
if (iJumpOut != -1)
|
|
SetJumpHere(iJumpOut);
|
|
// Set targets for break/continue
|
|
for (Loop::Control *pCtrl = pLoopStack->Controls; pCtrl; pCtrl = pCtrl->Next)
|
|
if (pCtrl->Break)
|
|
SetJumpHere(pCtrl->Pos);
|
|
else
|
|
SetJump(pCtrl->Pos, iJumpBack);
|
|
PopLoop();
|
|
}
|
|
|
|
void C4AulParseState::Parse_ForEach()
|
|
{
|
|
if (TokenType == ATT_IDTF && SEqual(Idtf, C4AUL_VarNamed))
|
|
{
|
|
Shift();
|
|
}
|
|
// get variable name
|
|
if (TokenType != ATT_IDTF)
|
|
UnexpectedToken("variable name");
|
|
if (Type == PREPARSER)
|
|
{
|
|
// insert variable
|
|
Fn->VarNamed.AddName(Idtf);
|
|
}
|
|
// search variable (fail if not found)
|
|
int iVarID = Fn->VarNamed.GetItemNr(Idtf);
|
|
if (iVarID < 0)
|
|
throw new C4AulParseError(this, "internal error: var definition: var not found in variable table");
|
|
Shift();
|
|
if (TokenType != ATT_IDTF || !SEqual(Idtf, C4AUL_In))
|
|
UnexpectedToken("'in'");
|
|
Shift();
|
|
// get expression for array
|
|
Parse_Expression();
|
|
Match(ATT_BCLOSE);
|
|
// push initial position (0)
|
|
AddBCC(AB_INT);
|
|
// get array element
|
|
int iStart = a->GetCodePos();
|
|
AddBCC(AB_FOREACH_NEXT, iVarID);
|
|
// jump out (FOREACH_NEXT will jump over this if
|
|
// we're not at the end of the array yet)
|
|
int iCond = a->GetCodePos();
|
|
AddBCC(AB_JUMP);
|
|
// got a loop...
|
|
PushLoop();
|
|
// loop body
|
|
Parse_Statement();
|
|
if (Type != PARSER) return;
|
|
// jump back
|
|
AddJump(AB_JUMP, iStart);
|
|
// set condition jump target
|
|
SetJumpHere(iCond);
|
|
// set jump targets for break/continue
|
|
for (Loop::Control *pCtrl = pLoopStack->Controls; pCtrl; pCtrl = pCtrl->Next)
|
|
if (pCtrl->Break)
|
|
SetJumpHere(pCtrl->Pos);
|
|
else
|
|
SetJump(pCtrl->Pos, iStart);
|
|
PopLoop();
|
|
// remove array and counter from stack
|
|
AddBCC(AB_STACK, -2);
|
|
}
|
|
|
|
void C4AulParseState::Parse_Expression(int iParentPrio)
|
|
{
|
|
int ndx;
|
|
switch (TokenType)
|
|
{
|
|
case ATT_IDTF:
|
|
{
|
|
// check for parameter (par)
|
|
if (Fn->ParNamed.GetItemNr(Idtf) != -1)
|
|
{
|
|
// insert variable by id
|
|
AddBCC(AB_PARN, Fn->ParNamed.GetItemNr(Idtf));
|
|
Shift();
|
|
}
|
|
// check for variable (var)
|
|
else if (Fn->VarNamed.GetItemNr(Idtf) != -1)
|
|
{
|
|
// insert variable by id
|
|
AddBCC(AB_VARN, Fn->VarNamed.GetItemNr(Idtf));
|
|
Shift();
|
|
}
|
|
else if (ContextToExecIn && (ndx = ContextToExecIn->Func->ParNamed.GetItemNr(Idtf)) != -1)
|
|
{
|
|
AddBCC(AB_PARN_CONTEXT, ndx);
|
|
Shift();
|
|
}
|
|
else if (ContextToExecIn && (ndx = ContextToExecIn->Func->VarNamed.GetItemNr(Idtf)) != -1)
|
|
{
|
|
AddBCC(AB_VARN_CONTEXT, ndx);
|
|
Shift();
|
|
}
|
|
// check for variable (local)
|
|
else if (a->LocalNamed.GetItemNr(Idtf) != -1)
|
|
{
|
|
// global func?
|
|
if (Fn->Owner == &::ScriptEngine)
|
|
throw new C4AulParseError(this, "using local variable in global function!");
|
|
// insert variable by id
|
|
C4String * pKey = Strings.RegString(Idtf);
|
|
AddBCC(AB_LOCALN, (intptr_t) pKey);
|
|
Shift();
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_True))
|
|
{
|
|
AddBCC(AB_BOOL, 1);
|
|
Shift();
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_False))
|
|
{
|
|
AddBCC(AB_BOOL, 0);
|
|
Shift();
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Nil))
|
|
{
|
|
AddBCC(AB_NIL);
|
|
Shift();
|
|
}
|
|
// check for global variable (static)
|
|
else if (a->Engine->GlobalNamedNames.GetItemNr(Idtf) != -1)
|
|
{
|
|
// insert variable by id
|
|
AddBCC(AB_GLOBALN, a->Engine->GlobalNamedNames.GetItemNr(Idtf));
|
|
Shift();
|
|
}
|
|
// function identifier: check special functions
|
|
else if (SEqual(Idtf, C4AUL_If))
|
|
// -> if is not a valid parameter
|
|
throw new C4AulParseError(this, "'if' may not be used as a parameter");
|
|
else if (SEqual(Idtf, C4AUL_While))
|
|
// -> while is not a valid parameter
|
|
throw new C4AulParseError(this, "'while' may not be used as a parameter");
|
|
else if (SEqual(Idtf, C4AUL_Else))
|
|
// -> else is not a valid parameter
|
|
throw new C4AulParseError(this, "misplaced 'else'");
|
|
else if (SEqual(Idtf, C4AUL_For))
|
|
// -> for is not a valid parameter
|
|
throw new C4AulParseError(this, "'for' may not be used as a parameter");
|
|
else if (SEqual(Idtf, C4AUL_Return))
|
|
{
|
|
Error("return may not be used as a parameter", 0);
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Par))
|
|
{
|
|
// and for Par
|
|
Shift();
|
|
Parse_Params(1, C4AUL_Par);
|
|
AddBCC(AB_PAR);
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Inherited) || SEqual(Idtf, C4AUL_SafeInherited))
|
|
{
|
|
Shift();
|
|
// get function
|
|
if (Fn->OwnerOverloaded)
|
|
{
|
|
// add direct call to byte code
|
|
Parse_Params(Fn->OwnerOverloaded->GetParCount(), NULL, Fn->OwnerOverloaded);
|
|
AddBCC(AB_FUNC, (intptr_t) Fn->OwnerOverloaded);
|
|
}
|
|
else
|
|
// not found? raise an error, if it's not a safe call
|
|
if (SEqual(Idtf, C4AUL_Inherited) && Type == PARSER)
|
|
throw new C4AulParseError(this, "inherited function not found (use _inherited to disable this message)");
|
|
else
|
|
{
|
|
// otherwise, parse parameters, but discard them
|
|
Parse_Params(0, NULL);
|
|
// Push a null as return value
|
|
AddBCC(AB_STACK, 1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// none of these? then it's a function
|
|
C4AulFunc *FoundFn;
|
|
// get regular function
|
|
if (Fn->Owner == &::ScriptEngine)
|
|
FoundFn = Fn->Owner->GetFuncRecursive(Idtf);
|
|
else
|
|
FoundFn = a->GetFuncRecursive(Idtf);
|
|
if (Type == PREPARSER)
|
|
{
|
|
Shift();
|
|
// The preparser just assumes that the syntax is correct: if no '(' follows, it must be a constant
|
|
if (TokenType == ATT_BOPEN)
|
|
Parse_Params(FoundFn ? FoundFn->GetParCount() : 10, Idtf, FoundFn);
|
|
}
|
|
else if (FoundFn)
|
|
{
|
|
if (Config.Developer.ExtraWarnings && !FoundFn->GetPublic())
|
|
Warn("using deprecated function ", Idtf);
|
|
Shift();
|
|
// Function parameters for all functions except "this", which can be used without
|
|
if (!SEqual(FoundFn->Name, C4AUL_this) || TokenType == ATT_BOPEN)
|
|
Parse_Params(FoundFn->GetParCount(), FoundFn->Name, FoundFn);
|
|
else
|
|
AddBCC(AB_STACK, FoundFn->GetParCount());
|
|
AddBCC(AB_FUNC, (intptr_t) FoundFn);
|
|
}
|
|
else
|
|
{
|
|
// -> func not found
|
|
// check for global constant (static const)
|
|
// global constants have lowest priority for backwards compatibility
|
|
// it is now allowed to have functional overloads of these constants
|
|
C4Value val;
|
|
if (a->Engine->GetGlobalConstant(Idtf, &val))
|
|
{
|
|
// store as direct constant
|
|
switch (val.GetType())
|
|
{
|
|
case C4V_Int: AddBCC(AB_INT, val.GetData().Int); break;
|
|
case C4V_Bool: AddBCC(AB_BOOL, val.GetData().Int); break;
|
|
case C4V_String:
|
|
AddBCC(AB_STRING, reinterpret_cast<intptr_t>(val._getStr()));
|
|
break;
|
|
case C4V_PropList:
|
|
AddBCC(AB_CPROPLIST, reinterpret_cast<intptr_t>(val._getPropList()));
|
|
break;
|
|
case C4V_Array:
|
|
AddBCC(AB_CARRAY, reinterpret_cast<intptr_t>(val._getArray()));
|
|
break;
|
|
case C4V_Any:
|
|
// any: allow zero
|
|
if (!val.GetData())
|
|
{
|
|
AddBCC(AB_NIL, 0);
|
|
break;
|
|
}
|
|
// otherwise: fall through to error
|
|
default:
|
|
{
|
|
throw new C4AulParseError(this,FormatString("internal error: constant %s has unsupported type %d", Idtf, val.GetType()).getData());
|
|
}
|
|
}
|
|
Shift();
|
|
}
|
|
else
|
|
{
|
|
// identifier could not be resolved
|
|
throw new C4AulParseError(this, "unknown identifier: ", Idtf);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case ATT_INT: // constant in cInt
|
|
{
|
|
AddBCC(AB_INT, cInt);
|
|
Shift();
|
|
break;
|
|
}
|
|
case ATT_STRING: // reference in cStr
|
|
{
|
|
AddBCC(AB_STRING, reinterpret_cast<intptr_t>(cStr));
|
|
Shift();
|
|
break;
|
|
}
|
|
case ATT_OPERATOR:
|
|
{
|
|
// -> must be a prefix operator
|
|
// get operator ID
|
|
int OpID = cInt;
|
|
// postfix?
|
|
if (C4ScriptOpMap[OpID].Postfix)
|
|
// oops. that's wrong
|
|
throw new C4AulParseError(this, "postfix operator without first expression");
|
|
Shift();
|
|
// generate code for the following expression
|
|
Parse_Expression(C4ScriptOpMap[OpID].Priority);
|
|
C4V_Type to = C4ScriptOpMap[OpID].Type1;
|
|
C4V_Type from = GetLastRetType(to);
|
|
if (C4Value::WarnAboutConversion(from, to))
|
|
{
|
|
Warn(FormatString("operator \"%s\" gets %s instead of %s", C4ScriptOpMap[OpID].Identifier, GetC4VName(from), GetC4VName(to)).getData(), NULL);
|
|
}
|
|
// ignore?
|
|
if (SEqual(C4ScriptOpMap[OpID].Identifier, "+"))
|
|
break;
|
|
// negate constant?
|
|
if (Type == PARSER && SEqual(C4ScriptOpMap[OpID].Identifier, "-"))
|
|
if ((a->CPos - 1)->bccType == AB_INT)
|
|
{
|
|
(a->CPos - 1)->Par.i = -(a->CPos - 1)->Par.i;
|
|
break;
|
|
}
|
|
// changer? make a setter BCC, leave value for operator
|
|
C4AulBCC Changer;
|
|
if(C4ScriptOpMap[OpID].Changer)
|
|
Changer = MakeSetter(true);
|
|
// write byte code
|
|
AddBCC(C4ScriptOpMap[OpID].Code, OpID);
|
|
// writter setter
|
|
if(C4ScriptOpMap[OpID].Changer)
|
|
AddBCC(Changer.bccType, Changer.Par.X);
|
|
break;
|
|
}
|
|
case ATT_BOPEN:
|
|
{
|
|
// parse it like a function...
|
|
Shift();
|
|
Parse_Expression();
|
|
Match(ATT_BCLOSE);
|
|
break;
|
|
}
|
|
case ATT_BOPEN2:
|
|
{
|
|
Parse_Array();
|
|
break;
|
|
}
|
|
case ATT_BLOPEN:
|
|
{
|
|
Parse_PropList();
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
// -> unexpected token
|
|
UnexpectedToken("expression");
|
|
}
|
|
}
|
|
Parse_Expression2(iParentPrio);
|
|
}
|
|
|
|
void C4AulParseState::Parse_Expression2(int iParentPrio)
|
|
{
|
|
while (1) switch (TokenType)
|
|
{
|
|
case ATT_SET:
|
|
{
|
|
// back out of any kind of parent operator
|
|
// (except other setters, as those are right-associative)
|
|
if(iParentPrio > 1)
|
|
return;
|
|
// generate setter
|
|
C4AulBCC Setter = MakeSetter(false);
|
|
// parse value to set
|
|
Shift();
|
|
Parse_Expression(1);
|
|
// write setter
|
|
AddBCC(Setter.bccType, Setter.Par.X);
|
|
break;
|
|
}
|
|
case ATT_OPERATOR:
|
|
{
|
|
// expect postfix operator
|
|
int OpID = cInt;
|
|
if (!C4ScriptOpMap[OpID].Postfix)
|
|
{
|
|
// does an operator with the same name exist?
|
|
// when it's a postfix-operator, it can be used instead.
|
|
int nOpID;
|
|
for (nOpID = OpID+1; C4ScriptOpMap[nOpID].Identifier; nOpID++)
|
|
if (SEqual(C4ScriptOpMap[OpID].Identifier, C4ScriptOpMap[nOpID].Identifier))
|
|
if (C4ScriptOpMap[nOpID].Postfix)
|
|
break;
|
|
// not found?
|
|
if (!C4ScriptOpMap[nOpID].Identifier)
|
|
{
|
|
throw new C4AulParseError(this, "unexpected prefix operator: ", C4ScriptOpMap[OpID].Identifier);
|
|
}
|
|
// otherwise use the new-found correct postfix operator
|
|
OpID = nOpID;
|
|
}
|
|
|
|
// changer?
|
|
C4AulBCC Setter;
|
|
if (C4ScriptOpMap[OpID].Changer)
|
|
{
|
|
// changer: back out only if parent operator is stronger
|
|
// (everything but setters and other changers, as changers are right-associative)
|
|
if(iParentPrio > C4ScriptOpMap[OpID].Priority)
|
|
return;
|
|
// generate setter, leave value on stack for operator
|
|
Setter = MakeSetter(true);
|
|
}
|
|
else
|
|
{
|
|
// normal operator: back out if parent operator is at least as strong
|
|
// (non-setter operators are left-associative)
|
|
if(iParentPrio >= C4ScriptOpMap[OpID].Priority)
|
|
return;
|
|
}
|
|
Shift();
|
|
|
|
if (C4ScriptOpMap[OpID].Code == AB_JUMPAND || C4ScriptOpMap[OpID].Code == AB_JUMPOR)
|
|
{
|
|
// create bytecode, remember position
|
|
int iCond = a->GetCodePos();
|
|
// Jump or discard first parameter
|
|
AddBCC(C4ScriptOpMap[OpID].Code);
|
|
// parse second expression
|
|
Parse_Expression(C4ScriptOpMap[OpID].Priority);
|
|
// set condition jump target
|
|
SetJumpHere(iCond);
|
|
// write setter (unused - could also optimize to skip self-assign, but must keep stack balanced)
|
|
if (C4ScriptOpMap[OpID].Changer)
|
|
AddBCC(Setter.bccType, Setter.Par.X);
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
C4V_Type to = C4ScriptOpMap[OpID].Type1;
|
|
C4V_Type from = GetLastRetType(to);
|
|
if (C4Value::WarnAboutConversion(from, to))
|
|
{
|
|
Warn(FormatString("operator \"%s\" left side gets %s instead of %s", C4ScriptOpMap[OpID].Identifier, GetC4VName(from), GetC4VName(to)).getData(), NULL);
|
|
}
|
|
// expect second parameter for operator
|
|
if (!C4ScriptOpMap[OpID].NoSecondStatement)
|
|
Parse_Expression(C4ScriptOpMap[OpID].Priority);
|
|
to = C4ScriptOpMap[OpID].Type2;
|
|
from = GetLastRetType(to);
|
|
if (C4Value::WarnAboutConversion(from, to))
|
|
{
|
|
Warn(FormatString("operator \"%s\" right side gets %s instead of %s", C4ScriptOpMap[OpID].Identifier, GetC4VName(from), GetC4VName(to)).getData(), NULL);
|
|
}
|
|
// write byte code
|
|
AddBCC(C4ScriptOpMap[OpID].Code, OpID);
|
|
// write setter and mofidier
|
|
if (C4ScriptOpMap[OpID].Changer)
|
|
{
|
|
AddBCC(Setter.bccType, Setter.Par.X);
|
|
if(C4ScriptOpMap[OpID].ResultModifier != AB_ERR)
|
|
AddBCC(C4ScriptOpMap[OpID].ResultModifier, OpID);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case ATT_BOPEN2:
|
|
{
|
|
// parse either [index], or [start:end] in which case either index is optional
|
|
Shift();
|
|
if (TokenType == ATT_COLON)
|
|
AddBCC(AB_INT, 0); // slice with first index missing -> implicit start index zero
|
|
else
|
|
Parse_Expression();
|
|
|
|
if (TokenType == ATT_BCLOSE2)
|
|
{
|
|
Shift();
|
|
AddBCC(AB_ARRAYA);
|
|
}
|
|
else if (TokenType == ATT_COLON)
|
|
{
|
|
Shift();
|
|
if (TokenType == ATT_BCLOSE2)
|
|
{
|
|
Shift();
|
|
AddBCC(AB_INT, INT_MAX); // second index missing -> implicit end index GetLength()
|
|
}
|
|
else
|
|
{
|
|
Parse_Expression();
|
|
Match(ATT_BCLOSE2);
|
|
}
|
|
AddBCC(AB_ARRAY_SLICE);
|
|
}
|
|
else
|
|
{
|
|
UnexpectedToken("']' or ':'");
|
|
}
|
|
break;
|
|
}
|
|
case ATT_DOT:
|
|
{
|
|
Shift();
|
|
if (TokenType != ATT_IDTF)
|
|
UnexpectedToken("Identifier");
|
|
C4String * pKey = Strings.RegString(Idtf);
|
|
AddBCC(AB_PROP, (intptr_t) pKey);
|
|
Shift();
|
|
break;
|
|
}
|
|
case ATT_CALL: case ATT_CALLFS:
|
|
{
|
|
C4AulFunc *pFunc = NULL;
|
|
C4String *pName = NULL;
|
|
C4AulBCCType eCallType = (TokenType == ATT_CALL) ? AB_CALL : AB_CALLFS;
|
|
Shift();
|
|
// expect identifier of called function now
|
|
if (TokenType != ATT_IDTF) throw new C4AulParseError(this, "expecting func name after '->'");
|
|
// search a function with the given name
|
|
if (!(pFunc = a->Engine->GetFirstFunc(Idtf)))
|
|
{
|
|
// not failsafe?
|
|
if (eCallType != AB_CALLFS && Type == PARSER)
|
|
Warn(FormatString("direct object call: function %s not found", Idtf).getData());
|
|
// otherwise: nothing to call - just execute parameters and discard them
|
|
Shift();
|
|
Parse_Params(0, NULL);
|
|
// remove target from stack, push a zero value as result
|
|
AddBCC(AB_STACK, -1); AddBCC(AB_STACK, +1);
|
|
// done
|
|
break;
|
|
}
|
|
if (Type == PARSER)
|
|
pName = ::Strings.RegString(Idtf);
|
|
// add call chunk
|
|
Shift();
|
|
Parse_Params(C4AUL_MAX_Par, pName ? pName->GetCStr() : Idtf, pFunc);
|
|
AddBCC(eCallType, reinterpret_cast<intptr_t>(pName));
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
void C4AulParseState::Parse_Var()
|
|
{
|
|
while (1)
|
|
{
|
|
// get desired variable name
|
|
if (TokenType != ATT_IDTF)
|
|
UnexpectedToken("variable name");
|
|
if (Type == PREPARSER)
|
|
{
|
|
// insert variable
|
|
Fn->VarNamed.AddName(Idtf);
|
|
}
|
|
// search variable (fail if not found)
|
|
int iVarID = Fn->VarNamed.GetItemNr(Idtf);
|
|
if (iVarID < 0)
|
|
throw new C4AulParseError(this, "internal error: var definition: var not found in variable table");
|
|
Shift();
|
|
if(TokenType == ATT_SET)
|
|
{
|
|
// insert initialization in byte code
|
|
Shift();
|
|
Parse_Expression();
|
|
AddBCC(AB_IVARN, iVarID);
|
|
}
|
|
switch (TokenType)
|
|
{
|
|
case ATT_COMMA:
|
|
Shift();
|
|
break;
|
|
case ATT_SCOLON:
|
|
return;
|
|
default:
|
|
UnexpectedToken("',' or ';'");
|
|
}
|
|
}
|
|
}
|
|
|
|
void C4AulParseState::Parse_Local()
|
|
{
|
|
while (1)
|
|
{
|
|
if (Type == PREPARSER)
|
|
{
|
|
// get desired variable name
|
|
if (TokenType != ATT_IDTF)
|
|
UnexpectedToken("variable name");
|
|
// check: symbol already in use?
|
|
if (a->GetFunc(Idtf))
|
|
throw new C4AulParseError(this, "variable definition: name already in use");
|
|
// insert variable
|
|
a->LocalNamed.AddName(Idtf);
|
|
}
|
|
char Name[C4AUL_MAX_Identifier] = ""; // current identifier
|
|
SCopy(Idtf, Name);
|
|
Match(ATT_IDTF);
|
|
if (TokenType == ATT_SET)
|
|
{
|
|
if (!a->Def)
|
|
throw new C4AulParseError(this, "local variables can only be initialized on object definitions");
|
|
// Parse numbers beginning with + or - as a number, not operator+number
|
|
Shift();
|
|
// register as constant
|
|
if (Type == PREPARSER)
|
|
a->Def->SetPropertyByS(Strings.RegString(Name), Parse_ConstExpression());
|
|
else
|
|
Parse_ConstExpression();
|
|
}
|
|
switch (TokenType)
|
|
{
|
|
case ATT_COMMA:
|
|
{
|
|
Shift();
|
|
break;
|
|
}
|
|
case ATT_SCOLON:
|
|
{
|
|
return;
|
|
}
|
|
default:
|
|
{
|
|
UnexpectedToken("',' or ';'");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void C4AulParseState::Parse_Static()
|
|
{
|
|
while (1)
|
|
{
|
|
if (Type == PREPARSER)
|
|
{
|
|
// get desired variable name
|
|
if (TokenType != ATT_IDTF)
|
|
UnexpectedToken("variable name");
|
|
// global variable definition
|
|
// check: symbol already in use?
|
|
if (a->Engine->GetFuncRecursive(Idtf)) Error("function and variable with name ", Idtf);
|
|
if (a->Engine->GetGlobalConstant(Idtf, NULL)) Error("constant and variable with name ", Idtf);
|
|
// insert variable if not defined already
|
|
if (a->Engine->GlobalNamedNames.GetItemNr(Idtf) == -1)
|
|
{
|
|
a->Engine->GlobalNamedNames.AddName(Idtf);
|
|
}
|
|
}
|
|
Match(ATT_IDTF);
|
|
switch (TokenType)
|
|
{
|
|
case ATT_COMMA:
|
|
{
|
|
Shift();
|
|
break;
|
|
}
|
|
case ATT_SCOLON:
|
|
{
|
|
return;
|
|
}
|
|
default:
|
|
{
|
|
UnexpectedToken("',' or ';'");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
C4Value C4AulParseState::Parse_ConstExpression()
|
|
{
|
|
C4Value r;
|
|
switch (TokenType)
|
|
{
|
|
case ATT_INT: r.SetInt(cInt); break;
|
|
case ATT_STRING: r.SetString(cStr); break; // increases ref count of C4String in cStr
|
|
case ATT_IDTF:
|
|
// identifier is only OK if it's another constant
|
|
if (SEqual(Idtf, C4AUL_True))
|
|
r.SetBool(true);
|
|
else if (SEqual(Idtf, C4AUL_False))
|
|
r.SetBool(false);
|
|
else if (SEqual(Idtf, C4AUL_Nil))
|
|
r.Set0();
|
|
else if (!a->Engine->GetGlobalConstant(Idtf, &r))
|
|
UnexpectedToken("constant value");
|
|
break;
|
|
case ATT_BOPEN2:
|
|
{
|
|
Shift();
|
|
// Create an array
|
|
if (Type == PREPARSER)
|
|
r.SetArray(new C4ValueArray());
|
|
int size = 0;
|
|
bool fDone = false;
|
|
do
|
|
switch (TokenType)
|
|
{
|
|
case ATT_BCLOSE2:
|
|
{
|
|
// [] -> size 0, [*,] -> size 2, [*,*,] -> size 3
|
|
if (size > 0)
|
|
{
|
|
if (Type == PREPARSER)
|
|
r._getArray()->SetItem(size, C4VNull);
|
|
++size;
|
|
}
|
|
fDone = true;
|
|
break;
|
|
}
|
|
case ATT_COMMA:
|
|
{
|
|
// got no parameter before a ","? then push nil
|
|
if (Type == PREPARSER)
|
|
r._getArray()->SetItem(size, C4VNull);
|
|
Shift();
|
|
++size;
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
if (Type == PREPARSER)
|
|
r._getArray()->SetItem(size, Parse_ConstExpression());
|
|
else
|
|
Parse_ConstExpression();
|
|
++size;
|
|
if (TokenType == ATT_COMMA)
|
|
Shift();
|
|
else if (TokenType == ATT_BCLOSE2)
|
|
{
|
|
fDone = true;
|
|
break;
|
|
}
|
|
else
|
|
UnexpectedToken("',' or ']'");
|
|
}
|
|
}
|
|
while (!fDone);
|
|
break;
|
|
}
|
|
case ATT_BLOPEN:
|
|
{
|
|
Shift();
|
|
if (Type == PREPARSER)
|
|
r.SetPropList(C4PropList::NewAnon());
|
|
while (TokenType != ATT_BLCLOSE)
|
|
{
|
|
C4String * pKey;
|
|
if (TokenType == ATT_IDTF)
|
|
{
|
|
if (Type == PREPARSER)
|
|
pKey = Strings.RegString(Idtf);
|
|
Shift();
|
|
}
|
|
else if (TokenType == ATT_STRING)
|
|
{
|
|
pKey = cStr;
|
|
Shift();
|
|
}
|
|
else UnexpectedToken("string or identifier");
|
|
if (TokenType != ATT_COLON && TokenType != ATT_SET)
|
|
UnexpectedToken("':' or '='");
|
|
Shift();
|
|
if (Type == PREPARSER)
|
|
r._getPropList()->SetPropertyByS(pKey, Parse_ConstExpression());
|
|
else
|
|
Parse_ConstExpression();
|
|
if (TokenType == ATT_COMMA)
|
|
Shift();
|
|
else if (TokenType != ATT_BLCLOSE)
|
|
UnexpectedToken("'}' or ','");
|
|
}
|
|
if (Type == PREPARSER)
|
|
r._getPropList()->Freeze();
|
|
break;
|
|
}
|
|
case ATT_OPERATOR:
|
|
{
|
|
// -> must be a prefix operator
|
|
// get operator ID
|
|
int OpID = cInt;
|
|
if (SEqual(C4ScriptOpMap[OpID].Identifier, "+"))
|
|
{
|
|
Shift();
|
|
if (TokenType == ATT_INT)
|
|
{
|
|
r.SetInt(cInt); break;
|
|
}
|
|
}
|
|
if (SEqual(C4ScriptOpMap[OpID].Identifier, "-"))
|
|
{
|
|
Shift();
|
|
if (TokenType == ATT_INT)
|
|
{
|
|
r.SetInt(-cInt); break;
|
|
}
|
|
}
|
|
}
|
|
// fallthrough
|
|
default:
|
|
UnexpectedToken("constant value");
|
|
}
|
|
// expect ',' (next global) or ';' (end of definition) now
|
|
Shift();
|
|
if (TokenType == ATT_OPERATOR)
|
|
{
|
|
int OpID = cInt;
|
|
if (C4ScriptOpMap[OpID].Code == AB_BitOr)
|
|
{
|
|
Shift();
|
|
C4Value r2 = Parse_ConstExpression();
|
|
r.SetInt(r.getInt() | r2.getInt());
|
|
}
|
|
}
|
|
return r;
|
|
}
|
|
|
|
void C4AulParseState::Parse_Const()
|
|
{
|
|
// get global constant definition(s)
|
|
while (1)
|
|
{
|
|
char Name[C4AUL_MAX_Identifier] = ""; // current identifier
|
|
// get desired variable name
|
|
if (TokenType != ATT_IDTF)
|
|
UnexpectedToken("constant name");
|
|
SCopy(Idtf, Name);
|
|
// check func lists - functions of same name are not allowed
|
|
if (a->Engine->GetFuncRecursive(Idtf))
|
|
Error("definition of constant hidden by function ", Idtf);
|
|
if (a->Engine->GlobalNamedNames.GetItemNr(Idtf) != -1)
|
|
Error("constant and variable with name ", Idtf);
|
|
Match(ATT_IDTF);
|
|
// expect '='
|
|
if (TokenType != ATT_SET)
|
|
UnexpectedToken("'='");
|
|
// expect value. Theoretically, something like C4AulScript::ExecOperator could be used here
|
|
// this would allow for definitions like "static const OCF_Edible = 1<<23"
|
|
// However, such stuff should better be generalized, so the preparser (and parser)
|
|
// can evaluate any constant expression, including functions with constant retval (e.g. Sqrt)
|
|
// So allow only simple constants for now.
|
|
Shift();
|
|
|
|
// register as constant
|
|
a->Engine->RegisterGlobalConstant(Name, Parse_ConstExpression());
|
|
|
|
switch (TokenType)
|
|
{
|
|
case ATT_COMMA:
|
|
{
|
|
Shift();
|
|
break;
|
|
}
|
|
case ATT_SCOLON:
|
|
{
|
|
return;
|
|
}
|
|
default:
|
|
{
|
|
UnexpectedToken("',' or ';'");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
bool C4AulScript::Parse()
|
|
{
|
|
if (DEBUG_BYTECODE_DUMP)
|
|
{
|
|
C4ScriptHost * scripthost = 0;
|
|
if (Def) scripthost = &Def->Script;
|
|
if (scripthost) fprintf(stderr, "parsing %s...\n", scripthost->ScriptName.getData());
|
|
else fprintf(stderr, "parsing unknown...\n");
|
|
}
|
|
// parse children
|
|
C4AulScript *s = Child0;
|
|
while (s) { s->Parse(); s = s->Next; }
|
|
// check state
|
|
if (State != ASS_LINKED) return false;
|
|
// don't parse global funcs again, as they're parsed already through links
|
|
if (this == Engine) return false;
|
|
// delete existing code
|
|
ClearCode();
|
|
|
|
// parse script funcs
|
|
C4AulFunc *f;
|
|
for (f = Func0; f; f = f->Next)
|
|
{
|
|
// check whether it's a script func, or linked to one
|
|
C4AulScriptFunc *Fn;
|
|
if (!(Fn = f->SFunc()))
|
|
{
|
|
if (f->LinkedTo) Fn = f->LinkedTo->SFunc();
|
|
// do only parse global funcs, because otherwise, the #append-links get parsed (->code overflow)
|
|
if (Fn) if (Fn->Owner != Engine) Fn=NULL;
|
|
}
|
|
if (Fn)
|
|
{
|
|
// parse function
|
|
try
|
|
{
|
|
ParseFn(Fn);
|
|
}
|
|
catch (C4AulError *err)
|
|
{
|
|
// do not show errors for System.ocg scripts that appear to be pure #appendto scripts
|
|
if (Fn->Owner->Def || Fn->Owner->Appends.empty())
|
|
{
|
|
// show
|
|
err->show();
|
|
// show a warning if the error is in a remote script
|
|
if (Fn->pOrgScript != this)
|
|
DebugLogF(" (as #appendto/#include to %s)", Fn->Owner->ScriptName.getData());
|
|
// and count (visible only ;) )
|
|
++::ScriptEngine.errCnt;
|
|
}
|
|
delete err;
|
|
// make all jumps that don't have their destination yet jump here
|
|
// intptr_t to make it work on 64bit
|
|
for (int i = Fn->CodePos; i < CPos - &Code[0]; i++)
|
|
{
|
|
C4AulBCC *pBCC = &Code[i];
|
|
if (IsJump(pBCC->bccType))
|
|
if (!pBCC->Par.i)
|
|
pBCC->Par.i = CPos - &Code[0] - i;
|
|
}
|
|
// add an error chunk
|
|
AddBCC(AB_ERR);
|
|
}
|
|
|
|
// add separator
|
|
AddBCC(AB_EOFN);
|
|
|
|
}
|
|
}
|
|
|
|
// add eof chunk
|
|
AddBCC(AB_EOF);
|
|
|
|
// calc absolute code addresses for script funcs
|
|
for (f = Func0; f; f = f->Next)
|
|
{
|
|
C4AulScriptFunc *Fn;
|
|
if (!(Fn = f->SFunc()))
|
|
{
|
|
if (f->LinkedTo) Fn = f->LinkedTo->SFunc();
|
|
if (Fn) if (Fn->Owner != Engine) Fn=NULL;
|
|
}
|
|
if (Fn)
|
|
assert(Fn->GetCodeOwner() == this);
|
|
}
|
|
|
|
// save line count
|
|
Engine->lineCnt += SGetLine(Script.getData(), Script.getPtr(Script.getLength()));
|
|
|
|
// dump bytecode
|
|
if (DEBUG_BYTECODE_DUMP)
|
|
for (f = Func0; f; f = f->Next)
|
|
{
|
|
C4AulScriptFunc *Fn;
|
|
if (!(Fn = f->SFunc()))
|
|
{
|
|
if (f->LinkedTo) Fn = f->LinkedTo->SFunc();
|
|
if (Fn) if (Fn->Owner != Engine) Fn=NULL;
|
|
}
|
|
if (!Fn)
|
|
continue;
|
|
fprintf(stderr, "%s:\n", Fn->Name);
|
|
for (C4AulBCC *pBCC = Fn->GetCode();; pBCC++)
|
|
{
|
|
C4AulBCCType eType = pBCC->bccType;
|
|
fprintf(stderr, "\t%d\t%s", Fn->GetLineOfCode(pBCC), GetTTName(eType));
|
|
switch (eType)
|
|
{
|
|
case AB_FUNC:
|
|
fprintf(stderr, "\t%s\n", pBCC->Par.f->Name); break;
|
|
case AB_CALL: case AB_CALLFS: case AB_LOCALN: case AB_PROP:
|
|
fprintf(stderr, "\t%s\n", pBCC->Par.s->GetCStr()); break;
|
|
case AB_STRING:
|
|
fprintf(stderr, "\t\"%s\"\n", pBCC->Par.s->GetCStr()); break;
|
|
case AB_DEBUG: case AB_NIL: case AB_RETURN:
|
|
case AB_PAR:
|
|
case AB_ARRAYA: case AB_ARRAY_SLICE: case AB_ERR:
|
|
case AB_EOFN: case AB_EOF:
|
|
assert(!pBCC->Par.X); fprintf(stderr, "\n"); break;
|
|
default:
|
|
fprintf(stderr, "\t%ld\n", static_cast<long>(pBCC->Par.X)); break;
|
|
}
|
|
if (eType == AB_EOFN) break;
|
|
}
|
|
}
|
|
|
|
// finished
|
|
State = ASS_PARSED;
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
void C4AulScript::ParseDescs()
|
|
{
|
|
// parse children
|
|
C4AulScript *s = Child0;
|
|
while (s) { s->ParseDescs(); s = s->Next; }
|
|
// check state
|
|
if (State < ASS_LINKED) return;
|
|
// parse descs of all script funcs
|
|
for (C4AulFunc *f = Func0; f; f = f->Next)
|
|
if (C4AulScriptFunc *Fn = f->SFunc()) Fn->ParseDesc();
|
|
}
|
|
|
|
C4AulScript *C4AulScript::FindFirstNonStrictScript()
|
|
{
|
|
// self is not #strict?
|
|
if (Script && Strict < MAXSTRICT) return this;
|
|
// search children
|
|
C4AulScript *pNonStrScr;
|
|
for (C4AulScript *pScr=Child0; pScr; pScr=pScr->Next)
|
|
if ((pNonStrScr=pScr->FindFirstNonStrictScript()))
|
|
return pNonStrScr;
|
|
// nothing found
|
|
return NULL;
|
|
}
|
|
|
|
#undef DEBUG_BYTECODE_DUMP
|