X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fsquirrel%2Fsquirrel%2Fsqlexer.cpp;h=2552f7d149059700d4fc9ba8b428c2f1c67263df;hb=a113d3bd1feddd510e3b2852b0d42522735eee40;hp=7244e73acd6971bcccc9456b42e32548e122063c;hpb=ff4c6994b952e26b854461d739eb3bcbfc30719f;p=supertux.git

diff --git a/src/squirrel/squirrel/sqlexer.cpp b/src/squirrel/squirrel/sqlexer.cpp
index 7244e73ac..2552f7d14 100644
--- a/src/squirrel/squirrel/sqlexer.cpp
+++ b/src/squirrel/squirrel/sqlexer.cpp
@@ -1,446 +1,446 @@
-/*
-	see copyright notice in squirrel.h
-*/
-#include "sqpcheader.h"
-#include <ctype.h>
-#include <stdlib.h>
-#include "sqtable.h"
-#include "sqstring.h"
-#include "sqcompiler.h"
-#include "sqlexer.h"
-
-#define CUR_CHAR (_currdata)
-#define RETURN_TOKEN(t) { _prevtoken = _curtoken; _curtoken = t; return t;}
-#define IS_EOB() (CUR_CHAR <= SQUIRREL_EOB)
-#define NEXT() {Next();_currentcolumn++;}
-#define INIT_TEMP_STRING() { _longstr.resize(0);}
-#define APPEND_CHAR(c) { _longstr.push_back(c);}
-#define TERMINATE_BUFFER() {_longstr.push_back(_SC('\0'));}
-#define ADD_KEYWORD(key,id) _keywords->NewSlot( SQString::Create(ss, _SC(#key)) ,SQInteger(id))
-
-SQLexer::SQLexer(){}
-SQLexer::~SQLexer()
-{
-	_keywords->Release();
-}
-
-void SQLexer::Init(SQSharedState *ss, SQLEXREADFUNC rg, SQUserPointer up,CompilerErrorFunc efunc,void *ed)
-{
-	_errfunc = efunc;
-	_errtarget = ed;
-	_sharedstate = ss;
-	_keywords = SQTable::Create(ss, 26);
-	ADD_KEYWORD(while, TK_WHILE);
-	ADD_KEYWORD(do, TK_DO);
-	ADD_KEYWORD(if, TK_IF);
-	ADD_KEYWORD(else, TK_ELSE);
-	ADD_KEYWORD(break, TK_BREAK);
-	ADD_KEYWORD(continue, TK_CONTINUE);
-	ADD_KEYWORD(return, TK_RETURN);
-	ADD_KEYWORD(null, TK_NULL);
-	ADD_KEYWORD(function, TK_FUNCTION);
-	ADD_KEYWORD(local, TK_LOCAL);
-	ADD_KEYWORD(for, TK_FOR);
-	ADD_KEYWORD(foreach, TK_FOREACH);
-	ADD_KEYWORD(in, TK_IN);
-	ADD_KEYWORD(typeof, TK_TYPEOF);
-	ADD_KEYWORD(delegate, TK_DELEGATE);
-	ADD_KEYWORD(delete, TK_DELETE);
-	ADD_KEYWORD(try, TK_TRY);
-	ADD_KEYWORD(catch, TK_CATCH);
-	ADD_KEYWORD(throw, TK_THROW);
-	ADD_KEYWORD(clone, TK_CLONE);
-	ADD_KEYWORD(yield, TK_YIELD);
-	ADD_KEYWORD(resume, TK_RESUME);
-	ADD_KEYWORD(switch, TK_SWITCH);
-	ADD_KEYWORD(case, TK_CASE);
-	ADD_KEYWORD(default, TK_DEFAULT);
-	ADD_KEYWORD(this, TK_THIS);
-	ADD_KEYWORD(parent,TK_PARENT);
-	ADD_KEYWORD(class,TK_CLASS);
-	ADD_KEYWORD(extends,TK_EXTENDS);
-	ADD_KEYWORD(constructor,TK_CONSTRUCTOR);
-	ADD_KEYWORD(instanceof,TK_INSTANCEOF);
-	ADD_KEYWORD(vargc,TK_VARGC);
-	ADD_KEYWORD(vargv,TK_VARGV);
-	ADD_KEYWORD(true,TK_TRUE);
-	ADD_KEYWORD(false,TK_FALSE);
-	ADD_KEYWORD(static,TK_STATIC);
-
-	_readf = rg;
-	_up = up;
-	_lasttokenline = _currentline = 1;
-	_currentcolumn = 0;
-	_prevtoken = -1;
-	Next();
-}
-
-void SQLexer::Error(const SQChar *err)
-{
-	_errfunc(_errtarget,err);
-}
-
-void SQLexer::Next()
-{
-	SQInteger t = _readf(_up);
-	if(t > MAX_CHAR) Error(_SC("Invalid character"));
-	if(t != 0) {
-		_currdata = (LexChar)t;
-		return;
-	}
-	_currdata = SQUIRREL_EOB;
-}
-
-const SQChar *SQLexer::Tok2Str(SQInteger tok)
-{
-	SQObjectPtr itr, key, val;
-	SQInteger nitr;
-	while((nitr = _keywords->Next(false,itr, key, val)) != -1) {
-		itr = (SQInteger)nitr;
-		if(((SQInteger)_integer(val)) == tok)
-			return _stringval(key);
-	}
-	return NULL;
-}
-
-void SQLexer::LexBlockComment()
-{
-	bool done = false;
-	while(!done) {
-		switch(CUR_CHAR) {
-			case _SC('*'): { NEXT(); if(CUR_CHAR == _SC('/')) { done = true; NEXT(); }}; continue;
-			case _SC('\n'): _currentline++; NEXT(); continue;
-			case SQUIRREL_EOB: Error(_SC("missing \"*/\" in comment"));
-			default: NEXT();
-		}
-	}
-}
-
-SQInteger SQLexer::Lex()
-{
-	_lasttokenline = _currentline;
-	while(CUR_CHAR != SQUIRREL_EOB) {
-		switch(CUR_CHAR){
-		case _SC('\t'): case _SC('\r'): case _SC(' '): NEXT(); continue;
-		case _SC('\n'):
-			_currentline++;
-			_prevtoken=_curtoken;
-			_curtoken=_SC('\n');
-			NEXT();
-			_currentcolumn=1;
-			continue;
-		case _SC('/'):
-			NEXT();
-			switch(CUR_CHAR){
-			case _SC('*'):
-				NEXT();
-				LexBlockComment();
-				continue;	
-			case _SC('/'):
-				do { NEXT(); } while (CUR_CHAR != _SC('\n') && (!IS_EOB()));
-				continue;
-			case _SC('='):
-				NEXT();
-				RETURN_TOKEN(TK_DIVEQ);
-				continue;
-			case _SC('>'):
-				NEXT();
-				RETURN_TOKEN(TK_ATTR_CLOSE);
-				continue;
-			default:
-				RETURN_TOKEN('/');
-			}
-		case _SC('='):
-			NEXT();
-			if (CUR_CHAR != _SC('=')){ RETURN_TOKEN('=') }
-			else { NEXT(); RETURN_TOKEN(TK_EQ); }
-		case _SC('<'):
-			NEXT();
-			if ( CUR_CHAR == _SC('=') ) { NEXT(); RETURN_TOKEN(TK_LE) }
-			else if ( CUR_CHAR == _SC('-') ) { NEXT(); RETURN_TOKEN(TK_NEWSLOT); }
-			else if ( CUR_CHAR == _SC('<') ) { NEXT(); RETURN_TOKEN(TK_SHIFTL); }
-			else if ( CUR_CHAR == _SC('/') ) { NEXT(); RETURN_TOKEN(TK_ATTR_OPEN); }
-			//else if ( CUR_CHAR == _SC('[') ) { NEXT(); ReadMultilineString(); RETURN_TOKEN(TK_STRING_LITERAL); }
-			else { RETURN_TOKEN('<') }
-		case _SC('>'):
-			NEXT();
-			if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_GE);}
-			else if(CUR_CHAR == _SC('>')){ 
-				NEXT(); 
-				if(CUR_CHAR == _SC('>')){
-					NEXT();
-					RETURN_TOKEN(TK_USHIFTR);
-				}
-				RETURN_TOKEN(TK_SHIFTR);
-			}
-			else { RETURN_TOKEN('>') }
-		case _SC('!'):
-			NEXT();
-			if (CUR_CHAR != _SC('=')){ RETURN_TOKEN('!')}
-			else { NEXT(); RETURN_TOKEN(TK_NE); }
-		case _SC('@'): {
-			SQInteger stype;
-			NEXT(); 
-			if(CUR_CHAR != _SC('"'))
-				Error(_SC("string expected"));
-			if((stype=ReadString('"',true))!=-1) {
-				RETURN_TOKEN(stype);
-			}
-			Error(_SC("error parsing the string"));
-					   }
-		case _SC('"'):
-		case _SC('\''): {
-			SQInteger stype;
-			if((stype=ReadString(CUR_CHAR,false))!=-1){
-				RETURN_TOKEN(stype);
-			}
-			Error(_SC("error parsing the string"));
-			}
-		case _SC('{'): case _SC('}'): case _SC('('): case _SC(')'): case _SC('['): case _SC(']'):
-		case _SC(';'): case _SC(','): case _SC('?'): case _SC('^'): case _SC('~'):
-			{SQInteger ret = CUR_CHAR;
-			NEXT(); RETURN_TOKEN(ret); }
-		case _SC('.'):
-			NEXT();
-			if (CUR_CHAR != _SC('.')){ RETURN_TOKEN('.') }
-			NEXT();
-			if (CUR_CHAR != _SC('.')){ Error(_SC("invalid token '..'")); }
-			NEXT();
-			RETURN_TOKEN(TK_VARPARAMS);
-		case _SC('&'):
-			NEXT();
-			if (CUR_CHAR != _SC('&')){ RETURN_TOKEN('&') }
-			else { NEXT(); RETURN_TOKEN(TK_AND); }
-		case _SC('|'):
-			NEXT();
-			if (CUR_CHAR != _SC('|')){ RETURN_TOKEN('|') }
-			else { NEXT(); RETURN_TOKEN(TK_OR); }
-		case _SC(':'):
-			NEXT();
-			if (CUR_CHAR != _SC(':')){ RETURN_TOKEN(':') }
-			else { NEXT(); RETURN_TOKEN(TK_DOUBLE_COLON); }
-		case _SC('*'):
-			NEXT();
-			if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_MULEQ);}
-			else RETURN_TOKEN('*');
-		case _SC('%'):
-			NEXT();
-			if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_MODEQ);}
-			else RETURN_TOKEN('%');
-		case _SC('-'):
-			NEXT();
-			if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_MINUSEQ);}
-			else if  (CUR_CHAR == _SC('-')){ NEXT(); RETURN_TOKEN(TK_MINUSMINUS);}
-			else RETURN_TOKEN('-');
-		case _SC('+'):
-			NEXT();
-			if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_PLUSEQ);}
-			else if (CUR_CHAR == _SC('+')){ NEXT(); RETURN_TOKEN(TK_PLUSPLUS);}
-			else RETURN_TOKEN('+');
-		case SQUIRREL_EOB:
-			return 0;
-		default:{
-				if (scisdigit(CUR_CHAR)) {
-					SQInteger ret = ReadNumber();
-					RETURN_TOKEN(ret);
-				}
-				else if (scisalpha(CUR_CHAR) || CUR_CHAR == _SC('_')) {
-					SQInteger t = ReadID();
-					RETURN_TOKEN(t);
-				}
-				else {
-					SQInteger c = CUR_CHAR;
-					if (sciscntrl((int)c)) Error(_SC("unexpected character(control)"));
-					NEXT();
-					RETURN_TOKEN(c);  
-				}
-				RETURN_TOKEN(0);
-			}
-		}
-	}
-	return 0;    
-}
-	
-SQInteger SQLexer::GetIDType(SQChar *s)
-{
-	SQObjectPtr t;
-	if(_keywords->Get(SQString::Create(_sharedstate, s), t)) {
-		return SQInteger(_integer(t));
-	}
-	return TK_IDENTIFIER;
-}
-
-
-SQInteger SQLexer::ReadString(SQInteger ndelim,bool verbatim)
-{
-	INIT_TEMP_STRING();
-	NEXT();
-	if(IS_EOB()) return -1;
-	for(;;) {
-		while(CUR_CHAR != ndelim) {
-			switch(CUR_CHAR) {
-			case SQUIRREL_EOB:
-				Error(_SC("unfinished string"));
-				return -1;
-			case _SC('\n'): 
-				if(!verbatim) Error(_SC("newline in a constant")); 
-				APPEND_CHAR(CUR_CHAR); NEXT(); 
-				_currentline++;
-				break;
-			case _SC('\\'):
-				if(verbatim) {
-					APPEND_CHAR('\\'); NEXT(); 
-				}
-				else {
-					NEXT();
-					switch(CUR_CHAR) {
-					case _SC('x'): NEXT(); {
-						if(!isxdigit(CUR_CHAR)) Error(_SC("hexadecimal number expected")); 
-						const SQInteger maxdigits = 4;
-						SQChar temp[maxdigits+1];
-						SQInteger n = 0;
-						while(isxdigit(CUR_CHAR) && n < maxdigits) {
-							temp[n] = CUR_CHAR;
-							n++;
-							NEXT();
-						}
-						temp[n] = 0;
-						SQChar *sTemp;
-						APPEND_CHAR((SQChar)scstrtoul(temp,&sTemp,16));
-					}
-				    break;
-					case _SC('t'): APPEND_CHAR(_SC('\t')); NEXT(); break;
-					case _SC('a'): APPEND_CHAR(_SC('\a')); NEXT(); break;
-					case _SC('b'): APPEND_CHAR(_SC('\b')); NEXT(); break;
-					case _SC('n'): APPEND_CHAR(_SC('\n')); NEXT(); break;
-					case _SC('r'): APPEND_CHAR(_SC('\r')); NEXT(); break;
-					case _SC('v'): APPEND_CHAR(_SC('\v')); NEXT(); break;
-					case _SC('f'): APPEND_CHAR(_SC('\f')); NEXT(); break;
-					case _SC('0'): APPEND_CHAR(_SC('\0')); NEXT(); break;
-					case _SC('\\'): APPEND_CHAR(_SC('\\')); NEXT(); break;
-					case _SC('"'): APPEND_CHAR(_SC('"')); NEXT(); break;
-					case _SC('\''): APPEND_CHAR(_SC('\'')); NEXT(); break;
-					default:
-						Error(_SC("unrecognised escaper char"));
-					break;
-					}
-				}
-				break;
-			default:
-				APPEND_CHAR(CUR_CHAR);
-				NEXT();
-			}
-		}
-		NEXT();
-		if(verbatim && CUR_CHAR == '"') { //double quotation
-			APPEND_CHAR(CUR_CHAR);
-			NEXT();
-		}
-		else {
-			break;
-		}
-	}
-	TERMINATE_BUFFER();
-	SQInteger len = _longstr.size()-1;
-	if(ndelim == _SC('\'')) {
-		if(len == 0) Error(_SC("empty constant"));
-		if(len > 1) Error(_SC("constant too long"));
-		_nvalue = _longstr[0];
-		return TK_INTEGER;
-	}
-	_svalue = &_longstr[0];
-	return TK_STRING_LITERAL;
-}
-
-void LexHexadecimal(const SQChar *s,SQUnsignedInteger *res)
-{
-	*res = 0;
-	while(*s != 0)
-	{
-		if(scisdigit(*s)) *res = (*res)*16+((*s++)-'0');
-		else if(scisxdigit(*s)) *res = (*res)*16+(toupper(*s++)-'A'+10);
-		else { assert(0); }
-	}
-}
-
-void LexInteger(const SQChar *s,SQUnsignedInteger *res)
-{
-	*res = 0;
-	while(*s != 0)
-	{
-		*res = (*res)*10+((*s++)-'0');
-	}
-}
-
-SQInteger isexponent(SQInteger c) { return c == 'e' || c=='E'; }
-#define MAX_HEX_DIGITS (sizeof(SQInteger)*2)
-SQInteger SQLexer::ReadNumber()
-{
-#define TINT 1
-#define TFLOAT 2
-#define THEX 3
-#define TSCIENTIFIC 4
-	SQInteger type = TINT, firstchar = CUR_CHAR;
-	SQChar *sTemp;
-	INIT_TEMP_STRING();
-	NEXT();
-	if(firstchar == _SC('0') && toupper(CUR_CHAR) == _SC('X')) {
-		NEXT();
-		type = THEX;
-		while(isxdigit(CUR_CHAR)) {
-			APPEND_CHAR(CUR_CHAR);
-			NEXT();
-		}
-		if(_longstr.size() > MAX_HEX_DIGITS) Error(_SC("too many digits for an Hex number"));
-	}
-	else {
-		APPEND_CHAR((int)firstchar);
-		while (CUR_CHAR == _SC('.') || scisdigit(CUR_CHAR) || isexponent(CUR_CHAR)) {
-            if(CUR_CHAR == _SC('.')) type = TFLOAT;
-			if(isexponent(CUR_CHAR)) {
-				if(type != TFLOAT) Error(_SC("invalid numeric format"));
-				type = TSCIENTIFIC;
-				APPEND_CHAR(CUR_CHAR);
-				NEXT();
-				if(CUR_CHAR == '+' || CUR_CHAR == '-'){
-					APPEND_CHAR(CUR_CHAR);
-					NEXT();
-				}
-				if(!scisdigit(CUR_CHAR)) Error(_SC("exponent expected"));
-			}
-			
-			APPEND_CHAR(CUR_CHAR);
-			NEXT();
-		}
-	}
-	TERMINATE_BUFFER();
-	switch(type) {
-	case TSCIENTIFIC:
-	case TFLOAT:
-		_fvalue = (SQFloat)scstrtod(&_longstr[0],&sTemp);
-		return TK_FLOAT;
-	case TINT:
-		LexInteger(&_longstr[0],(SQUnsignedInteger *)&_nvalue);
-		return TK_INTEGER;
-	case THEX:
-		LexHexadecimal(&_longstr[0],(SQUnsignedInteger *)&_nvalue);
-		return TK_INTEGER;
-	}
-	return 0;
-}
-
-SQInteger SQLexer::ReadID()
-{
-	SQInteger res;
-	INIT_TEMP_STRING();
-	do {
-		APPEND_CHAR(CUR_CHAR);
-		NEXT();
-	} while(scisalnum(CUR_CHAR) || CUR_CHAR == _SC('_'));
-	TERMINATE_BUFFER();
-	res = GetIDType(&_longstr[0]);
-	if(res == TK_IDENTIFIER || res == TK_CONSTRUCTOR) {
-		_svalue = &_longstr[0];
-	}
-	return res;
-}
+/*
+	see copyright notice in squirrel.h
+*/
+#include "sqpcheader.h"
+#include <ctype.h>
+#include <stdlib.h>
+#include "sqtable.h"
+#include "sqstring.h"
+#include "sqcompiler.h"
+#include "sqlexer.h"
+
+#define CUR_CHAR (_currdata)
+#define RETURN_TOKEN(t) { _prevtoken = _curtoken; _curtoken = t; return t;}
+#define IS_EOB() (CUR_CHAR <= SQUIRREL_EOB)
+#define NEXT() {Next();_currentcolumn++;}
+#define INIT_TEMP_STRING() { _longstr.resize(0);}
+#define APPEND_CHAR(c) { _longstr.push_back(c);}
+#define TERMINATE_BUFFER() {_longstr.push_back(_SC('\0'));}
+#define ADD_KEYWORD(key,id) _keywords->NewSlot( SQString::Create(ss, _SC(#key)) ,SQInteger(id))
+
+SQLexer::SQLexer(){}
+SQLexer::~SQLexer()
+{
+	_keywords->Release();
+}
+
+void SQLexer::Init(SQSharedState *ss, SQLEXREADFUNC rg, SQUserPointer up,CompilerErrorFunc efunc,void *ed)
+{
+	_errfunc = efunc;
+	_errtarget = ed;
+	_sharedstate = ss;
+	_keywords = SQTable::Create(ss, 26);
+	ADD_KEYWORD(while, TK_WHILE);
+	ADD_KEYWORD(do, TK_DO);
+	ADD_KEYWORD(if, TK_IF);
+	ADD_KEYWORD(else, TK_ELSE);
+	ADD_KEYWORD(break, TK_BREAK);
+	ADD_KEYWORD(continue, TK_CONTINUE);
+	ADD_KEYWORD(return, TK_RETURN);
+	ADD_KEYWORD(null, TK_NULL);
+	ADD_KEYWORD(function, TK_FUNCTION);
+	ADD_KEYWORD(local, TK_LOCAL);
+	ADD_KEYWORD(for, TK_FOR);
+	ADD_KEYWORD(foreach, TK_FOREACH);
+	ADD_KEYWORD(in, TK_IN);
+	ADD_KEYWORD(typeof, TK_TYPEOF);
+	ADD_KEYWORD(delegate, TK_DELEGATE);
+	ADD_KEYWORD(delete, TK_DELETE);
+	ADD_KEYWORD(try, TK_TRY);
+	ADD_KEYWORD(catch, TK_CATCH);
+	ADD_KEYWORD(throw, TK_THROW);
+	ADD_KEYWORD(clone, TK_CLONE);
+	ADD_KEYWORD(yield, TK_YIELD);
+	ADD_KEYWORD(resume, TK_RESUME);
+	ADD_KEYWORD(switch, TK_SWITCH);
+	ADD_KEYWORD(case, TK_CASE);
+	ADD_KEYWORD(default, TK_DEFAULT);
+	ADD_KEYWORD(this, TK_THIS);
+	ADD_KEYWORD(parent,TK_PARENT);
+	ADD_KEYWORD(class,TK_CLASS);
+	ADD_KEYWORD(extends,TK_EXTENDS);
+	ADD_KEYWORD(constructor,TK_CONSTRUCTOR);
+	ADD_KEYWORD(instanceof,TK_INSTANCEOF);
+	ADD_KEYWORD(vargc,TK_VARGC);
+	ADD_KEYWORD(vargv,TK_VARGV);
+	ADD_KEYWORD(true,TK_TRUE);
+	ADD_KEYWORD(false,TK_FALSE);
+	ADD_KEYWORD(static,TK_STATIC);
+
+	_readf = rg;
+	_up = up;
+	_lasttokenline = _currentline = 1;
+	_currentcolumn = 0;
+	_prevtoken = -1;
+	Next();
+}
+
+void SQLexer::Error(const SQChar *err)
+{
+	_errfunc(_errtarget,err);
+}
+
+void SQLexer::Next()
+{
+	SQInteger t = _readf(_up);
+	if(t > MAX_CHAR) Error(_SC("Invalid character"));
+	if(t != 0) {
+		_currdata = (LexChar)t;
+		return;
+	}
+	_currdata = SQUIRREL_EOB;
+}
+
+const SQChar *SQLexer::Tok2Str(SQInteger tok)
+{
+	SQObjectPtr itr, key, val;
+	SQInteger nitr;
+	while((nitr = _keywords->Next(false,itr, key, val)) != -1) {
+		itr = (SQInteger)nitr;
+		if(((SQInteger)_integer(val)) == tok)
+			return _stringval(key);
+	}
+	return NULL;
+}
+
+void SQLexer::LexBlockComment()
+{
+	bool done = false;
+	while(!done) {
+		switch(CUR_CHAR) {
+			case _SC('*'): { NEXT(); if(CUR_CHAR == _SC('/')) { done = true; NEXT(); }}; continue;
+			case _SC('\n'): _currentline++; NEXT(); continue;
+			case SQUIRREL_EOB: Error(_SC("missing \"*/\" in comment"));
+			default: NEXT();
+		}
+	}
+}
+
+SQInteger SQLexer::Lex()
+{
+	_lasttokenline = _currentline;
+	while(CUR_CHAR != SQUIRREL_EOB) {
+		switch(CUR_CHAR){
+		case _SC('\t'): case _SC('\r'): case _SC(' '): NEXT(); continue;
+		case _SC('\n'):
+			_currentline++;
+			_prevtoken=_curtoken;
+			_curtoken=_SC('\n');
+			NEXT();
+			_currentcolumn=1;
+			continue;
+		case _SC('/'):
+			NEXT();
+			switch(CUR_CHAR){
+			case _SC('*'):
+				NEXT();
+				LexBlockComment();
+				continue;
+			case _SC('/'):
+				do { NEXT(); } while (CUR_CHAR != _SC('\n') && (!IS_EOB()));
+				continue;
+			case _SC('='):
+				NEXT();
+				RETURN_TOKEN(TK_DIVEQ);
+				continue;
+			case _SC('>'):
+				NEXT();
+				RETURN_TOKEN(TK_ATTR_CLOSE);
+				continue;
+			default:
+				RETURN_TOKEN('/');
+			}
+		case _SC('='):
+			NEXT();
+			if (CUR_CHAR != _SC('=')){ RETURN_TOKEN('=') }
+			else { NEXT(); RETURN_TOKEN(TK_EQ); }
+		case _SC('<'):
+			NEXT();
+			if ( CUR_CHAR == _SC('=') ) { NEXT(); RETURN_TOKEN(TK_LE) }
+			else if ( CUR_CHAR == _SC('-') ) { NEXT(); RETURN_TOKEN(TK_NEWSLOT); }
+			else if ( CUR_CHAR == _SC('<') ) { NEXT(); RETURN_TOKEN(TK_SHIFTL); }
+			else if ( CUR_CHAR == _SC('/') ) { NEXT(); RETURN_TOKEN(TK_ATTR_OPEN); }
+			//else if ( CUR_CHAR == _SC('[') ) { NEXT(); ReadMultilineString(); RETURN_TOKEN(TK_STRING_LITERAL); }
+			else { RETURN_TOKEN('<') }
+		case _SC('>'):
+			NEXT();
+			if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_GE);}
+			else if(CUR_CHAR == _SC('>')){
+				NEXT();
+				if(CUR_CHAR == _SC('>')){
+					NEXT();
+					RETURN_TOKEN(TK_USHIFTR);
+				}
+				RETURN_TOKEN(TK_SHIFTR);
+			}
+			else { RETURN_TOKEN('>') }
+		case _SC('!'):
+			NEXT();
+			if (CUR_CHAR != _SC('=')){ RETURN_TOKEN('!')}
+			else { NEXT(); RETURN_TOKEN(TK_NE); }
+		case _SC('@'): {
+			SQInteger stype;
+			NEXT();
+			if(CUR_CHAR != _SC('"'))
+				Error(_SC("string expected"));
+			if((stype=ReadString('"',true))!=-1) {
+				RETURN_TOKEN(stype);
+			}
+			Error(_SC("error parsing the string"));
+					   }
+		case _SC('"'):
+		case _SC('\''): {
+			SQInteger stype;
+			if((stype=ReadString(CUR_CHAR,false))!=-1){
+				RETURN_TOKEN(stype);
+			}
+			Error(_SC("error parsing the string"));
+			}
+		case _SC('{'): case _SC('}'): case _SC('('): case _SC(')'): case _SC('['): case _SC(']'):
+		case _SC(';'): case _SC(','): case _SC('?'): case _SC('^'): case _SC('~'):
+			{SQInteger ret = CUR_CHAR;
+			NEXT(); RETURN_TOKEN(ret); }
+		case _SC('.'):
+			NEXT();
+			if (CUR_CHAR != _SC('.')){ RETURN_TOKEN('.') }
+			NEXT();
+			if (CUR_CHAR != _SC('.')){ Error(_SC("invalid token '..'")); }
+			NEXT();
+			RETURN_TOKEN(TK_VARPARAMS);
+		case _SC('&'):
+			NEXT();
+			if (CUR_CHAR != _SC('&')){ RETURN_TOKEN('&') }
+			else { NEXT(); RETURN_TOKEN(TK_AND); }
+		case _SC('|'):
+			NEXT();
+			if (CUR_CHAR != _SC('|')){ RETURN_TOKEN('|') }
+			else { NEXT(); RETURN_TOKEN(TK_OR); }
+		case _SC(':'):
+			NEXT();
+			if (CUR_CHAR != _SC(':')){ RETURN_TOKEN(':') }
+			else { NEXT(); RETURN_TOKEN(TK_DOUBLE_COLON); }
+		case _SC('*'):
+			NEXT();
+			if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_MULEQ);}
+			else RETURN_TOKEN('*');
+		case _SC('%'):
+			NEXT();
+			if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_MODEQ);}
+			else RETURN_TOKEN('%');
+		case _SC('-'):
+			NEXT();
+			if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_MINUSEQ);}
+			else if  (CUR_CHAR == _SC('-')){ NEXT(); RETURN_TOKEN(TK_MINUSMINUS);}
+			else RETURN_TOKEN('-');
+		case _SC('+'):
+			NEXT();
+			if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_PLUSEQ);}
+			else if (CUR_CHAR == _SC('+')){ NEXT(); RETURN_TOKEN(TK_PLUSPLUS);}
+			else RETURN_TOKEN('+');
+		case SQUIRREL_EOB:
+			return 0;
+		default:{
+				if (scisdigit(CUR_CHAR)) {
+					SQInteger ret = ReadNumber();
+					RETURN_TOKEN(ret);
+				}
+				else if (scisalpha(CUR_CHAR) || CUR_CHAR == _SC('_')) {
+					SQInteger t = ReadID();
+					RETURN_TOKEN(t);
+				}
+				else {
+					SQInteger c = CUR_CHAR;
+					if (sciscntrl((int)c)) Error(_SC("unexpected character(control)"));
+					NEXT();
+					RETURN_TOKEN(c);
+				}
+				RETURN_TOKEN(0);
+			}
+		}
+	}
+	return 0;
+}
+
+SQInteger SQLexer::GetIDType(SQChar *s)
+{
+	SQObjectPtr t;
+	if(_keywords->Get(SQString::Create(_sharedstate, s), t)) {
+		return SQInteger(_integer(t));
+	}
+	return TK_IDENTIFIER;
+}
+
+
+SQInteger SQLexer::ReadString(SQInteger ndelim,bool verbatim)
+{
+	INIT_TEMP_STRING();
+	NEXT();
+	if(IS_EOB()) return -1;
+	for(;;) {
+		while(CUR_CHAR != ndelim) {
+			switch(CUR_CHAR) {
+			case SQUIRREL_EOB:
+				Error(_SC("unfinished string"));
+				return -1;
+			case _SC('\n'):
+				if(!verbatim) Error(_SC("newline in a constant"));
+				APPEND_CHAR(CUR_CHAR); NEXT();
+				_currentline++;
+				break;
+			case _SC('\\'):
+				if(verbatim) {
+					APPEND_CHAR('\\'); NEXT();
+				}
+				else {
+					NEXT();
+					switch(CUR_CHAR) {
+					case _SC('x'): NEXT(); {
+						if(!isxdigit(CUR_CHAR)) Error(_SC("hexadecimal number expected"));
+						const SQInteger maxdigits = 4;
+						SQChar temp[maxdigits+1];
+						SQInteger n = 0;
+						while(isxdigit(CUR_CHAR) && n < maxdigits) {
+							temp[n] = CUR_CHAR;
+							n++;
+							NEXT();
+						}
+						temp[n] = 0;
+						SQChar *sTemp;
+						APPEND_CHAR((SQChar)scstrtoul(temp,&sTemp,16));
+					}
+				    break;
+					case _SC('t'): APPEND_CHAR(_SC('\t')); NEXT(); break;
+					case _SC('a'): APPEND_CHAR(_SC('\a')); NEXT(); break;
+					case _SC('b'): APPEND_CHAR(_SC('\b')); NEXT(); break;
+					case _SC('n'): APPEND_CHAR(_SC('\n')); NEXT(); break;
+					case _SC('r'): APPEND_CHAR(_SC('\r')); NEXT(); break;
+					case _SC('v'): APPEND_CHAR(_SC('\v')); NEXT(); break;
+					case _SC('f'): APPEND_CHAR(_SC('\f')); NEXT(); break;
+					case _SC('0'): APPEND_CHAR(_SC('\0')); NEXT(); break;
+					case _SC('\\'): APPEND_CHAR(_SC('\\')); NEXT(); break;
+					case _SC('"'): APPEND_CHAR(_SC('"')); NEXT(); break;
+					case _SC('\''): APPEND_CHAR(_SC('\'')); NEXT(); break;
+					default:
+						Error(_SC("unrecognised escaper char"));
+					break;
+					}
+				}
+				break;
+			default:
+				APPEND_CHAR(CUR_CHAR);
+				NEXT();
+			}
+		}
+		NEXT();
+		if(verbatim && CUR_CHAR == '"') { //double quotation
+			APPEND_CHAR(CUR_CHAR);
+			NEXT();
+		}
+		else {
+			break;
+		}
+	}
+	TERMINATE_BUFFER();
+	SQInteger len = _longstr.size()-1;
+	if(ndelim == _SC('\'')) {
+		if(len == 0) Error(_SC("empty constant"));
+		if(len > 1) Error(_SC("constant too long"));
+		_nvalue = _longstr[0];
+		return TK_INTEGER;
+	}
+	_svalue = &_longstr[0];
+	return TK_STRING_LITERAL;
+}
+
+void LexHexadecimal(const SQChar *s,SQUnsignedInteger *res)
+{
+	*res = 0;
+	while(*s != 0)
+	{
+		if(scisdigit(*s)) *res = (*res)*16+((*s++)-'0');
+		else if(scisxdigit(*s)) *res = (*res)*16+(toupper(*s++)-'A'+10);
+		else { assert(0); }
+	}
+}
+
+void LexInteger(const SQChar *s,SQUnsignedInteger *res)
+{
+	*res = 0;
+	while(*s != 0)
+	{
+		*res = (*res)*10+((*s++)-'0');
+	}
+}
+
+SQInteger isexponent(SQInteger c) { return c == 'e' || c=='E'; }
+#define MAX_HEX_DIGITS (sizeof(SQInteger)*2)
+SQInteger SQLexer::ReadNumber()
+{
+#define TINT 1
+#define TFLOAT 2
+#define THEX 3
+#define TSCIENTIFIC 4
+	SQInteger type = TINT, firstchar = CUR_CHAR;
+	SQChar *sTemp;
+	INIT_TEMP_STRING();
+	NEXT();
+	if(firstchar == _SC('0') && toupper(CUR_CHAR) == _SC('X')) {
+		NEXT();
+		type = THEX;
+		while(isxdigit(CUR_CHAR)) {
+			APPEND_CHAR(CUR_CHAR);
+			NEXT();
+		}
+		if(_longstr.size() > MAX_HEX_DIGITS) Error(_SC("too many digits for an Hex number"));
+	}
+	else {
+		APPEND_CHAR((int)firstchar);
+		while (CUR_CHAR == _SC('.') || scisdigit(CUR_CHAR) || isexponent(CUR_CHAR)) {
+            if(CUR_CHAR == _SC('.')) type = TFLOAT;
+			if(isexponent(CUR_CHAR)) {
+				if(type != TFLOAT) Error(_SC("invalid numeric format"));
+				type = TSCIENTIFIC;
+				APPEND_CHAR(CUR_CHAR);
+				NEXT();
+				if(CUR_CHAR == '+' || CUR_CHAR == '-'){
+					APPEND_CHAR(CUR_CHAR);
+					NEXT();
+				}
+				if(!scisdigit(CUR_CHAR)) Error(_SC("exponent expected"));
+			}
+
+			APPEND_CHAR(CUR_CHAR);
+			NEXT();
+		}
+	}
+	TERMINATE_BUFFER();
+	switch(type) {
+	case TSCIENTIFIC:
+	case TFLOAT:
+		_fvalue = (SQFloat)scstrtod(&_longstr[0],&sTemp);
+		return TK_FLOAT;
+	case TINT:
+		LexInteger(&_longstr[0],(SQUnsignedInteger *)&_nvalue);
+		return TK_INTEGER;
+	case THEX:
+		LexHexadecimal(&_longstr[0],(SQUnsignedInteger *)&_nvalue);
+		return TK_INTEGER;
+	}
+	return 0;
+}
+
+SQInteger SQLexer::ReadID()
+{
+	SQInteger res;
+	INIT_TEMP_STRING();
+	do {
+		APPEND_CHAR(CUR_CHAR);
+		NEXT();
+	} while(scisalnum(CUR_CHAR) || CUR_CHAR == _SC('_'));
+	TERMINATE_BUFFER();
+	res = GetIDType(&_longstr[0]);
+	if(res == TK_IDENTIFIER || res == TK_CONSTRUCTOR) {
+		_svalue = &_longstr[0];
+	}
+	return res;
+}