2 see copyright notice in squirrel.h
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4 #include "sqpcheader.h"
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8 #include "sqstring.h"
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9 #include "sqcompiler.h"
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10 #include "sqlexer.h"
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12 #define CUR_CHAR (_currdata)
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13 #define RETURN_TOKEN(t) { _prevtoken = _curtoken; _curtoken = t; return t;}
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14 #define IS_EOB() (CUR_CHAR <= SQUIRREL_EOB)
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15 #define NEXT() {Next();_currentcolumn++;}
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16 #define INIT_TEMP_STRING() { _longstr.resize(0);}
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17 #define APPEND_CHAR(c) { _longstr.push_back(c);}
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18 #define TERMINATE_BUFFER() {_longstr.push_back(_SC('\0'));}
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19 #define ADD_KEYWORD(key,id) _keywords->NewSlot( SQString::Create(ss, _SC(#key)) ,SQInteger(id))
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21 SQLexer::SQLexer(){}
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24 _keywords->Release();
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27 void SQLexer::Init(SQSharedState *ss, SQLEXREADFUNC rg, SQUserPointer up)
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30 _keywords = SQTable::Create(ss, 26);
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31 ADD_KEYWORD(while, TK_WHILE);
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32 ADD_KEYWORD(do, TK_DO);
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33 ADD_KEYWORD(if, TK_IF);
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34 ADD_KEYWORD(else, TK_ELSE);
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35 ADD_KEYWORD(break, TK_BREAK);
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36 ADD_KEYWORD(continue, TK_CONTINUE);
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37 ADD_KEYWORD(return, TK_RETURN);
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38 ADD_KEYWORD(null, TK_NULL);
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39 ADD_KEYWORD(function, TK_FUNCTION);
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40 ADD_KEYWORD(local, TK_LOCAL);
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41 ADD_KEYWORD(for, TK_FOR);
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42 ADD_KEYWORD(foreach, TK_FOREACH);
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43 ADD_KEYWORD(in, TK_IN);
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44 ADD_KEYWORD(typeof, TK_TYPEOF);
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45 ADD_KEYWORD(delegate, TK_DELEGATE);
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46 ADD_KEYWORD(delete, TK_DELETE);
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47 ADD_KEYWORD(try, TK_TRY);
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48 ADD_KEYWORD(catch, TK_CATCH);
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49 ADD_KEYWORD(throw, TK_THROW);
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50 ADD_KEYWORD(clone, TK_CLONE);
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51 ADD_KEYWORD(yield, TK_YIELD);
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52 ADD_KEYWORD(resume, TK_RESUME);
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53 ADD_KEYWORD(switch, TK_SWITCH);
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54 ADD_KEYWORD(case, TK_CASE);
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55 ADD_KEYWORD(default, TK_DEFAULT);
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56 ADD_KEYWORD(this, TK_THIS);
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57 ADD_KEYWORD(parent,TK_PARENT);
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58 ADD_KEYWORD(class,TK_CLASS);
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59 ADD_KEYWORD(extends,TK_EXTENDS);
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60 ADD_KEYWORD(constructor,TK_CONSTRUCTOR);
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61 ADD_KEYWORD(instanceof,TK_INSTANCEOF);
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62 ADD_KEYWORD(vargc,TK_VARGC);
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63 ADD_KEYWORD(vargv,TK_VARGV);
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64 ADD_KEYWORD(true,TK_TRUE);
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65 ADD_KEYWORD(false,TK_FALSE);
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69 _lasttokenline = _currentline = 1;
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75 void SQLexer::Next()
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77 SQInteger t = _readf(_up);
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78 if(t > MAX_CHAR) throw ParserException(_SC("Invalid character"));
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83 _currdata = SQUIRREL_EOB;
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86 SQObjectPtr SQLexer::Tok2Str(int tok)
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88 SQObjectPtr itr, key, val;
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90 while((nitr = _keywords->Next(itr, key, val)) != -1) {
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91 itr = (SQInteger)nitr;
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92 if(((int)_integer(val)) == tok)
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95 return SQObjectPtr();
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98 void SQLexer::LexBlockComment()
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103 case _SC('*'): { NEXT(); if(CUR_CHAR == _SC('/')) { done = true; NEXT(); }}; continue;
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104 //case _SC('/'): { NEXT(); if(CUR_CHAR == _SC('*')) { nest++; NEXT(); }}; continue;
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105 case _SC('\n'): _currentline++; NEXT(); continue;
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106 case SQUIRREL_EOB: throw ParserException(_SC("missing \"*/\" in comment"));
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114 _lasttokenline = _currentline;
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115 while(CUR_CHAR != SQUIRREL_EOB) {
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117 case _SC('\t'): case _SC('\r'): case _SC(' '): NEXT(); continue;
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120 _prevtoken=_curtoken;
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121 _curtoken=_SC('\n');
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133 do { NEXT(); } while (CUR_CHAR != _SC('\n') && (!IS_EOB()));
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137 RETURN_TOKEN(TK_DIVEQ);
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141 RETURN_TOKEN(TK_ATTR_CLOSE);
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148 if (CUR_CHAR != _SC('=')){ RETURN_TOKEN('=') }
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149 else { NEXT(); RETURN_TOKEN(TK_EQ); }
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152 if ( CUR_CHAR == _SC('=') ) { NEXT(); RETURN_TOKEN(TK_LE) }
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153 else if ( CUR_CHAR == _SC('-') ) { NEXT(); RETURN_TOKEN(TK_NEWSLOT); }
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154 else if ( CUR_CHAR == _SC('<') ) { NEXT(); RETURN_TOKEN(TK_SHIFTL); }
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155 else if ( CUR_CHAR == _SC('/') ) { NEXT(); RETURN_TOKEN(TK_ATTR_OPEN); }
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156 //else if ( CUR_CHAR == _SC('[') ) { NEXT(); ReadMultilineString(); RETURN_TOKEN(TK_STRING_LITERAL); }
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157 else { RETURN_TOKEN('<') }
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160 if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_GE);}
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161 else if(CUR_CHAR == _SC('>')){
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163 if(CUR_CHAR == _SC('>')){
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165 RETURN_TOKEN(TK_USHIFTR);
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167 RETURN_TOKEN(TK_SHIFTR);
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169 else { RETURN_TOKEN('>') }
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172 if (CUR_CHAR != _SC('=')){ RETURN_TOKEN('!')}
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173 else { NEXT(); RETURN_TOKEN(TK_NE); }
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177 if(CUR_CHAR != _SC('"'))
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178 throw ParserException(_SC("string expected"));
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179 if((stype=ReadString('"',true))!=-1) {
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180 RETURN_TOKEN(stype);
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182 throw ParserException(_SC("error parsing the string"));
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187 if((stype=ReadString(CUR_CHAR,false))!=-1){
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188 RETURN_TOKEN(stype);
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190 throw ParserException(_SC("error parsing the string"));
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192 case _SC('{'): case _SC('}'): case _SC('('): case _SC(')'): case _SC('['): case _SC(']'):
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193 case _SC(';'): case _SC(','): case _SC('?'): case _SC('^'): case _SC('~'):
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194 {int ret = CUR_CHAR;
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195 NEXT(); RETURN_TOKEN(ret); }
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198 if (CUR_CHAR != _SC('.')){ RETURN_TOKEN('.') }
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200 if (CUR_CHAR != _SC('.')){ throw ParserException(_SC("invalid token '..'")); }
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202 RETURN_TOKEN(TK_VARPARAMS);
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205 if (CUR_CHAR != _SC('&')){ RETURN_TOKEN('&') }
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206 else { NEXT(); RETURN_TOKEN(TK_AND); }
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209 if (CUR_CHAR != _SC('|')){ RETURN_TOKEN('|') }
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210 else { NEXT(); RETURN_TOKEN(TK_OR); }
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213 if (CUR_CHAR != _SC(':')){ RETURN_TOKEN(':') }
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214 else { NEXT(); RETURN_TOKEN(TK_DOUBLE_COLON); }
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217 if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_MULEQ);}
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218 else RETURN_TOKEN('*');
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221 if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_MODEQ);}
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222 else RETURN_TOKEN('%');
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225 if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_MINUSEQ);}
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226 else if (CUR_CHAR == _SC('-')){ NEXT(); RETURN_TOKEN(TK_MINUSMINUS);}
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227 else RETURN_TOKEN('-');
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230 if (CUR_CHAR == _SC('=')){ NEXT(); RETURN_TOKEN(TK_PLUSEQ);}
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231 else if (CUR_CHAR == _SC('+')){ NEXT(); RETURN_TOKEN(TK_PLUSPLUS);}
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232 else RETURN_TOKEN('+');
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236 if (scisdigit(CUR_CHAR)) {
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237 int ret = ReadNumber();
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240 else if (scisalpha(CUR_CHAR) || CUR_CHAR == _SC('_')) {
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246 if (sciscntrl(c)) throw ParserException(_SC("unexpected character(control)"));
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257 int SQLexer::GetIDType(SQChar *s)
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260 if(_keywords->Get(SQString::Create(_sharedstate, s), t)) {
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261 return int(_integer(t));
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263 return TK_IDENTIFIER;
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267 int SQLexer::ReadString(int ndelim,bool verbatim)
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269 INIT_TEMP_STRING();
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271 if(IS_EOB()) return -1;
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273 while(CUR_CHAR != ndelim) {
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276 throw ParserException(_SC("unfinished string"));
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279 if(!verbatim) throw ParserException(_SC("newline in a constant"));
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280 APPEND_CHAR(CUR_CHAR); NEXT();
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284 APPEND_CHAR('\\'); NEXT();
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290 case _SC('t'): APPEND_CHAR(_SC('\t')); NEXT(); break;
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291 case _SC('a'): APPEND_CHAR(_SC('\a')); NEXT(); break;
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292 case _SC('b'): APPEND_CHAR(_SC('\b')); NEXT(); break;
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293 case _SC('n'): APPEND_CHAR(_SC('\n')); NEXT(); break;
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294 case _SC('r'): APPEND_CHAR(_SC('\r')); NEXT(); break;
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295 case _SC('v'): APPEND_CHAR(_SC('\v')); NEXT(); break;
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296 case _SC('f'): APPEND_CHAR(_SC('\f')); NEXT(); break;
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297 case _SC('0'): APPEND_CHAR(_SC('\0')); NEXT(); break;
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298 case _SC('\\'): APPEND_CHAR(_SC('\\')); NEXT(); break;
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299 case _SC('"'): APPEND_CHAR(_SC('"')); NEXT(); break;
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300 case _SC('\''): APPEND_CHAR(_SC('\'')); NEXT(); break;
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302 throw ParserException(_SC("unrecognised escaper char"));
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308 APPEND_CHAR(CUR_CHAR);
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313 if(verbatim && CUR_CHAR == '"') { //double quotation
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314 APPEND_CHAR(CUR_CHAR);
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321 TERMINATE_BUFFER();
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322 int len = _longstr.size()-1;
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323 if(ndelim == _SC('\'')) {
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324 if(len == 0) throw ParserException(_SC("empty constant"));
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325 if(len > 1) throw ParserException(_SC("constant too long"));
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326 _nvalue = _longstr[0];
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329 _svalue = &_longstr[0];
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330 return TK_STRING_LITERAL;
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333 int isexponent(int c) { return c == 'e' || c=='E'; }
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335 int SQLexer::ReadNumber()
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340 #define TSCIENTIFIC 4
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341 int type = TINT, firstchar = CUR_CHAR;
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342 bool isfloat = false;
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344 INIT_TEMP_STRING();
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346 if(firstchar == _SC('0') && toupper(CUR_CHAR) == _SC('X')) {
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349 while(isxdigit(CUR_CHAR)) {
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350 APPEND_CHAR(CUR_CHAR);
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353 if(_longstr.size() > 8) throw ParserException(_SC("Hex number over 8 digits"));
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356 APPEND_CHAR(firstchar);
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357 while (CUR_CHAR == _SC('.') || scisdigit(CUR_CHAR) || isexponent(CUR_CHAR)) {
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358 if(CUR_CHAR == _SC('.')) type = TFLOAT;
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359 if(isexponent(CUR_CHAR)) {
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360 if(type != TFLOAT) throw ParserException(_SC("invalid numeric format"));
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361 type = TSCIENTIFIC;
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362 APPEND_CHAR(CUR_CHAR);
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364 if(CUR_CHAR == '+' || CUR_CHAR == '-'){
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365 APPEND_CHAR(CUR_CHAR);
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368 if(!scisdigit(CUR_CHAR)) throw ParserException(_SC("exponent expected"));
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371 APPEND_CHAR(CUR_CHAR);
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375 TERMINATE_BUFFER();
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379 _fvalue = (SQFloat)scstrtod(&_longstr[0],&sTemp);
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382 _nvalue = (SQInteger)scatoi(&_longstr[0]);
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385 *((unsigned long *)&_nvalue) = scstrtoul(&_longstr[0],&sTemp,16);
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391 int SQLexer::ReadID()
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394 INIT_TEMP_STRING();
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396 APPEND_CHAR(CUR_CHAR);
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398 } while(scisalnum(CUR_CHAR) || CUR_CHAR == _SC('_'));
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399 TERMINATE_BUFFER();
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400 res = GetIDType(&_longstr[0]);
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401 if(res == TK_IDENTIFIER) {
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402 _svalue = &_longstr[0];
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