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da859ddb416b0c97408fec096b489f65d3ea84f9
jpexs-decompiler/libsrc/ffdec_lib/lexers/actionscript3_pcode.flex
Jindra Petřík da859ddb41 AS3 p-code editing - metadata read/write support
2016-08-28 17:01:50 +02:00

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/*
* Copyright (C) 2010-2016 JPEXS, All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3.0 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
*/
/* Flash assembler language lexer specification */
package com.jpexs.decompiler.flash.abc.avm2.parser.pcode;
import com.jpexs.decompiler.flash.abc.avm2.parser.AVM2ParseException;
import java.util.Stack;
%%
%public
%class Flasm3Lexer
%final
%unicode
%ignorecase
%char
%line
%column
%type ParsedSymbol
%throws AVM2ParseException
%{
StringBuilder string = new StringBuilder();
boolean isMultiname = false;
long multinameId = 0;
/**
* Create an empty lexer, yyrset will be called later to reset and assign
* the reader
*/
public Flasm3Lexer() {
}
public int yychar() {
return yychar;
}
public int yyline() {
return yyline + 1;
}
private Stack<ParsedSymbol> pushedBack = new Stack<>();
public void pushback(ParsedSymbol symb) {
pushedBack.push(symb);
last = null;
}
ParsedSymbol last;
public ParsedSymbol lex() throws java.io.IOException, AVM2ParseException{
ParsedSymbol ret = null;
if (!pushedBack.isEmpty()){
ret = last = pushedBack.pop();
} else {
ret = last = yylex();
}
return ret;
}
%}
/* main character classes */
LineTerminator = \r|\n|\r\n
InputCharacter = [^\r\n]
Comment = ";" {InputCharacter}*
WhiteSpace = [ \t\f]+
Multiname = m\[[0-9]+\]
/* identifiers */
Identifier = [:jletter:][:jletterdigit:]*
InstructionName = [a-z][a-z0-9_]*
Label = {Identifier}:
/* integer literals */
NumberLiteral = 0 | -?[1-9][0-9]*
PositiveNumberLiteral = 0 | [1-9][0-9]*
/* floating point literals */
FloatLiteral = -?({FLit1}|{FLit2}|{FLit3}) {Exponent}?
FLit1 = [0-9]+ \. [0-9]*
FLit2 = \. [0-9]+
FLit3 = [0-9]+
Exponent = [eE] [+-]? [0-9]+
HexDigit = [0-9a-fA-F]
OctDigit = [0-7]
/* string and character literals */
StringCharacter = [^\r\n\"\\]
ExceptionStart = "exceptionstart "{PositiveNumberLiteral}":"
ExceptionEnd = "exceptionend "{PositiveNumberLiteral}":"
ExceptionTarget = "exceptiontarget "{PositiveNumberLiteral}":"
%state STRING,PARAMETERS
%%
<YYINITIAL> {
/* whitespace */
{WhiteSpace} { }
{ExceptionStart} {
String s=yytext();
return new ParsedSymbol(ParsedSymbol.TYPE_EXCEPTION_START, Integer.parseInt(s.substring(15, s.length() - 1)));
}
{ExceptionEnd} {
String s=yytext();
return new ParsedSymbol(ParsedSymbol.TYPE_EXCEPTION_END, Integer.parseInt(s.substring(13, s.length() - 1)));
}
{ExceptionTarget} {
String s=yytext();
return new ParsedSymbol(ParsedSymbol.TYPE_EXCEPTION_TARGET,Integer.parseInt(s.substring(16, s.length() - 1)));
}
{Label} {
String s = yytext();
return new ParsedSymbol(ParsedSymbol.TYPE_LABEL, s.substring(0, s.length() - 1));
}
"name" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_NAME, yytext());}
"try" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_TRY, yytext());}
"flag" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_FLAG, yytext());}
"param" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_PARAM, yytext());}
"paramname" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_PARAMNAME, yytext());}
"optional" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_OPTIONAL, yytext());}
"returns" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_RETURNS, yytext());}
"body" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_BODY, yytext());}
"maxstack" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_MAXSTACK, yytext());}
"localcount" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_LOCALCOUNT, yytext());}
"initscopedepth" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_INITSCOPEDEPTH, yytext());}
"maxscopedepth" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_MAXSCOPEDEPTH, yytext());}
"code" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_CODE, yytext());}
"trait" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_TRAIT, yytext());}
"method" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_METHOD, yytext());}
"metadata" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_METADATA_BLOCK, yytext());}
"item" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_ITEM, yytext());}
"end" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_END, yytext());}
/*in params too:*/
"dispid" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_DISPID, yytext());}
"slotid" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_SLOTID, yytext());}
"value" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_VALUE, yytext());}
/* identifiers */
{InstructionName} { yybegin(PARAMETERS);
return new ParsedSymbol(ParsedSymbol.TYPE_INSTRUCTION_NAME, yytext());
}
{Comment} {return new ParsedSymbol(ParsedSymbol.TYPE_COMMENT, yytext().substring(1));}
}
<PARAMETERS> {
/* string literal */
\" {
isMultiname = false;
yybegin(STRING);
string.setLength(0);
}
{Multiname}\" {
isMultiname = true;
String s = yytext();
multinameId = Long.parseLong(s.substring(2, s.length() - 2));
yybegin(STRING);
string.setLength(0);
}
/* multinames */
"QName" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_QNAME, yytext());}
"QNameA" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_QNAMEA, yytext());}
"RTQName" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_RTQNAME, yytext());}
"RTQNameA" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_RTQNAMEA, yytext());}
"RTQNameL" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_RTQNAMEL, yytext());}
"RTQNameLA" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_RTQNAMELA, yytext());}
"Multiname" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_MULTINAME, yytext());}
"MultinameA" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_MULTINAMEA, yytext());}
"MultinameL" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_MULTINAMEL, yytext());}
"MultinameLA" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_MULTINAMELA, yytext());}
"TypeName" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_TYPENAME, yytext());}
"null" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_NULL, yytext());}
"(" { return new ParsedSymbol(ParsedSymbol.TYPE_PARENT_OPEN, yytext());}
")" { return new ParsedSymbol(ParsedSymbol.TYPE_PARENT_CLOSE, yytext());}
"[" { return new ParsedSymbol(ParsedSymbol.TYPE_BRACKET_OPEN, yytext());}
"]" { return new ParsedSymbol(ParsedSymbol.TYPE_BRACKET_CLOSE, yytext());}
"<" { return new ParsedSymbol(ParsedSymbol.TYPE_LOWERTHAN, yytext());}
">" { return new ParsedSymbol(ParsedSymbol.TYPE_GREATERTHAN, yytext());}
"Namespace" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_NAMESPACE, yytext());}
"PrivateNamespace" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_PRIVATENAMESPACE, yytext());}
"PackageNamespace" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_PACKAGENAMESPACE, yytext());}
"PackageInternalNs" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_PACKAGEINTERNALNS, yytext());}
"ProtectedNamespace" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_PROTECTEDNAMESPACE, yytext());}
"ExplicitNamespace" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_EXPLICITNAMESPACE, yytext());}
"StaticProtectedNs" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_STATICPROTECTEDNS, yytext());}
"," { return new ParsedSymbol(ParsedSymbol.TYPE_COMMA, yytext());}
/*Try*/
"from" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_FROM, yytext());}
"to" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_TO, yytext());}
"target" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_TARGET, yytext());}
"name" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_NAME, yytext());}
"type" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_TYPE, yytext());}
"slot" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_SLOT, yytext());}
"const" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_CONST, yytext());}
"method" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_METHOD, yytext());}
"getter" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_GETTER, yytext());}
"setter" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_SETTER, yytext());}
"class" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_CLASS, yytext());}
"function" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_FUNCTION, yytext());}
"dispid" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_DISPID, yytext());}
"slotid" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_SLOTID, yytext());}
"value" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_VALUE, yytext());}
"flag" { yybegin(PARAMETERS); return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_FLAG, yytext());}
/*Flags*/
"EXPLICIT" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_EXPLICIT, yytext());}
"HAS_OPTIONAL" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_HAS_OPTIONAL, yytext());}
"HAS_PARAM_NAMES" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_HAS_PARAM_NAMES, yytext());}
"IGNORE_REST" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_IGNORE_REST, yytext());}
"NEED_ACTIVATION" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_NEED_ACTIVATION, yytext());}
"NEED_ARGUMENTS" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_NEED_ARGUMENTS, yytext());}
"NEED_REST" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_NEED_REST, yytext());}
"SET_DXNS" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_SET_DXNS, yytext());}
/* Value types*/
"Integer" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_INTEGER, yytext());}
"UInteger" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_UINTEGER, yytext());}
"Double" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_DOUBLE, yytext());}
"Decimal" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_DECIMAL, yytext());}
"Utf8" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_UTF8, yytext());}
"True" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_TRUE, yytext());}
"False" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_FALSE, yytext());}
"Undefined" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_UNDEFINED, yytext());}
"FINAL" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_FINAL, yytext());}
"OVERRIDE" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_OVERRIDE, yytext());}
"METADATA" { return new ParsedSymbol(ParsedSymbol.TYPE_KEYWORD_METADATA, yytext());}
/* numeric literals */
{NumberLiteral} { return new ParsedSymbol(ParsedSymbol.TYPE_INTEGER, Long.parseLong((yytext()))); }
{FloatLiteral} { return new ParsedSymbol(ParsedSymbol.TYPE_FLOAT, Double.parseDouble((yytext()))); }
{Identifier} { return new ParsedSymbol(ParsedSymbol.TYPE_IDENTIFIER, yytext()); }
{LineTerminator} {yybegin(YYINITIAL);}
{Comment} {return new ParsedSymbol(ParsedSymbol.TYPE_COMMENT, yytext().substring(1));}
}
<STRING> {
\" {
yybegin(PARAMETERS);
// length also includes the trailing quote
if (isMultiname){
return new ParsedSymbol(ParsedSymbol.TYPE_MULTINAME, multinameId);
} else {
return new ParsedSymbol(ParsedSymbol.TYPE_STRING, string.toString());
}
}
{StringCharacter}+ { string.append(yytext()); }
/* escape sequences */
"\\b" { string.append('\b'); }
"\\t" { string.append('\t'); }
"\\n" { string.append('\n'); }
"\\f" { string.append('\f'); }
"\\r" { string.append('\r'); }
"\\\"" { string.append('\"'); }
"\\'" { string.append('\''); }
"\\\\" { string.append('\\'); }
\\x{HexDigit}{2} { char val = (char) Integer.parseInt(yytext().substring(2), 16);
string.append(val); }
\\u{HexDigit}{4} { char val = (char) Integer.parseInt(yytext().substring(2), 16);
string.append(val); }
/* error cases */
\\. { throw new AVM2ParseException("Illegal escape sequence \"" + yytext() + "\"", yyline + 1); }
{LineTerminator} { throw new AVM2ParseException("Unterminated string at end of line", yyline + 1); }
}
/* error fallback */
[^] { }
<<EOF>> { return new ParsedSymbol(ParsedSymbol.TYPE_EOF); }
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