diff options
Diffstat (limited to 'squirrel_3_0_1_stable/squirrel/sqlexer.cpp')
| -rw-r--r-- | squirrel_3_0_1_stable/squirrel/sqlexer.cpp | 978 |
1 files changed, 489 insertions, 489 deletions
diff --git a/squirrel_3_0_1_stable/squirrel/sqlexer.cpp b/squirrel_3_0_1_stable/squirrel/sqlexer.cpp index ab17ba619..ec1704b71 100644 --- a/squirrel_3_0_1_stable/squirrel/sqlexer.cpp +++ b/squirrel_3_0_1_stable/squirrel/sqlexer.cpp @@ -1,489 +1,489 @@ -/*
- 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(base, TK_BASE);
- 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(class,TK_CLASS);
- ADD_KEYWORD(extends,TK_EXTENDS);
- ADD_KEYWORD(constructor,TK_CONSTRUCTOR);
- ADD_KEYWORD(instanceof,TK_INSTANCEOF);
- ADD_KEYWORD(true,TK_TRUE);
- ADD_KEYWORD(false,TK_FALSE);
- ADD_KEYWORD(static,TK_STATIC);
- ADD_KEYWORD(enum,TK_ENUM);
- ADD_KEYWORD(const,TK_CONST);
-
- _readf = rg;
- _up = up;
- _lasttokenline = _currentline = 1;
- _currentcolumn = 0;
- _prevtoken = -1;
- _reached_eof = SQFalse;
- 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;
- _reached_eof = SQTrue;
-}
-
-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();
- }
- }
-}
-void SQLexer::LexLineComment()
-{
- do { NEXT(); } while (CUR_CHAR != _SC('\n') && (!IS_EOB()));
-}
-
-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('#'): LexLineComment(); continue;
- case _SC('/'):
- NEXT();
- switch(CUR_CHAR){
- case _SC('*'):
- NEXT();
- LexBlockComment();
- continue;
- case _SC('/'):
- LexLineComment();
- 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();
- switch(CUR_CHAR) {
- case _SC('='):
- NEXT();
- if(CUR_CHAR == _SC('>')) {
- NEXT();
- RETURN_TOKEN(TK_3WAYSCMP);
- }
- RETURN_TOKEN(TK_LE)
- break;
- case _SC('-'): NEXT(); RETURN_TOKEN(TK_NEWSLOT); break;
- case _SC('<'): NEXT(); RETURN_TOKEN(TK_SHIFTL); break;
- case _SC('/'): NEXT(); RETURN_TOKEN(TK_ATTR_OPEN); break;
- }
- 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('"')) {
- RETURN_TOKEN('@');
- }
- 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 scisodigit(SQInteger c) { return c >= _SC('0') && c <= _SC('7'); }
-
-void LexOctal(const SQChar *s,SQUnsignedInteger *res)
-{
- *res = 0;
- while(*s != 0)
- {
- if(scisodigit(*s)) *res = (*res)*8+((*s++)-'0');
- else { assert(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
-#define TOCTAL 5
- SQInteger type = TINT, firstchar = CUR_CHAR;
- SQChar *sTemp;
- INIT_TEMP_STRING();
- NEXT();
- if(firstchar == _SC('0') && (toupper(CUR_CHAR) == _SC('X') || scisodigit(CUR_CHAR)) ) {
- if(scisodigit(CUR_CHAR)) {
- type = TOCTAL;
- while(scisodigit(CUR_CHAR)) {
- APPEND_CHAR(CUR_CHAR);
- NEXT();
- }
- if(scisdigit(CUR_CHAR)) Error(_SC("invalid octal number"));
- }
- else {
- 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;
- case TOCTAL:
- LexOctal(&_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(base, TK_BASE); + 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(class,TK_CLASS); + ADD_KEYWORD(extends,TK_EXTENDS); + ADD_KEYWORD(constructor,TK_CONSTRUCTOR); + ADD_KEYWORD(instanceof,TK_INSTANCEOF); + ADD_KEYWORD(true,TK_TRUE); + ADD_KEYWORD(false,TK_FALSE); + ADD_KEYWORD(static,TK_STATIC); + ADD_KEYWORD(enum,TK_ENUM); + ADD_KEYWORD(const,TK_CONST); + + _readf = rg; + _up = up; + _lasttokenline = _currentline = 1; + _currentcolumn = 0; + _prevtoken = -1; + _reached_eof = SQFalse; + 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; + _reached_eof = SQTrue; +} + +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(); + } + } +} +void SQLexer::LexLineComment() +{ + do { NEXT(); } while (CUR_CHAR != _SC('\n') && (!IS_EOB())); +} + +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('#'): LexLineComment(); continue; + case _SC('/'): + NEXT(); + switch(CUR_CHAR){ + case _SC('*'): + NEXT(); + LexBlockComment(); + continue; + case _SC('/'): + LexLineComment(); + 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(); + switch(CUR_CHAR) { + case _SC('='): + NEXT(); + if(CUR_CHAR == _SC('>')) { + NEXT(); + RETURN_TOKEN(TK_3WAYSCMP); + } + RETURN_TOKEN(TK_LE) + break; + case _SC('-'): NEXT(); RETURN_TOKEN(TK_NEWSLOT); break; + case _SC('<'): NEXT(); RETURN_TOKEN(TK_SHIFTL); break; + case _SC('/'): NEXT(); RETURN_TOKEN(TK_ATTR_OPEN); break; + } + 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('"')) { + RETURN_TOKEN('@'); + } + 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 scisodigit(SQInteger c) { return c >= _SC('0') && c <= _SC('7'); } + +void LexOctal(const SQChar *s,SQUnsignedInteger *res) +{ + *res = 0; + while(*s != 0) + { + if(scisodigit(*s)) *res = (*res)*8+((*s++)-'0'); + else { assert(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 +#define TOCTAL 5 + SQInteger type = TINT, firstchar = CUR_CHAR; + SQChar *sTemp; + INIT_TEMP_STRING(); + NEXT(); + if(firstchar == _SC('0') && (toupper(CUR_CHAR) == _SC('X') || scisodigit(CUR_CHAR)) ) { + if(scisodigit(CUR_CHAR)) { + type = TOCTAL; + while(scisodigit(CUR_CHAR)) { + APPEND_CHAR(CUR_CHAR); + NEXT(); + } + if(scisdigit(CUR_CHAR)) Error(_SC("invalid octal number")); + } + else { + 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; + case TOCTAL: + LexOctal(&_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; +} |