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      1 //
      2 // Copyright (C) 2013 LunarG, Inc.
      3 //
      4 // All rights reserved.
      5 //
      6 // Redistribution and use in source and binary forms, with or without
      7 // modification, are permitted provided that the following conditions
      8 // are met:
      9 //
     10 //    Redistributions of source code must retain the above copyright
     11 //    notice, this list of conditions and the following disclaimer.
     12 //
     13 //    Redistributions in binary form must reproduce the above
     14 //    copyright notice, this list of conditions and the following
     15 //    disclaimer in the documentation and/or other materials provided
     16 //    with the distribution.
     17 //
     18 //    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
     19 //    contributors may be used to endorse or promote products derived
     20 //    from this software without specific prior written permission.
     21 //
     22 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     23 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     24 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     25 // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
     26 // COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     27 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     28 // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     29 // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
     30 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31 // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     32 // ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33 // POSSIBILITY OF SUCH DAMAGE.
     34 //
     35 
     36 //
     37 // This holds context specific to the GLSL scanner, which
     38 // sits between the preprocessor scanner and parser.
     39 //
     40 
     41 #pragma once
     42 
     43 #include "ParseHelper.h"
     44 
     45 namespace glslang {
     46 
     47 class TPpContext;
     48 class TPpToken;
     49 class TParserToken;
     50 
     51 class TScanContext {
     52 public:
     53     explicit TScanContext(TParseContextBase& pc) : parseContext(pc), afterType(false), field(false) { }
     54     virtual ~TScanContext() { }
     55 
     56     static void fillInKeywordMap();
     57     static void deleteKeywordMap();
     58 
     59     int tokenize(TPpContext*, TParserToken&);
     60 
     61 protected:
     62     TScanContext(TScanContext&);
     63     TScanContext& operator=(TScanContext&);
     64 
     65     int tokenizeIdentifier();
     66     int identifierOrType();
     67     int reservedWord();
     68     int identifierOrReserved(bool reserved);
     69     int es30ReservedFromGLSL(int version);
     70     int nonreservedKeyword(int esVersion, int nonEsVersion);
     71     int precisionKeyword();
     72     int matNxM();
     73     int dMat();
     74     int firstGenerationImage(bool inEs310);
     75     int secondGenerationImage();
     76 
     77     TParseContextBase& parseContext;
     78     bool afterType;           // true if we've recognized a type, so can only be looking for an identifier
     79     bool field;               // true if we're on a field, right after a '.'
     80     TSourceLoc loc;
     81     TParserToken* parserToken;
     82     TPpToken* ppToken;
     83 
     84     const char* tokenText;
     85     int keyword;
     86 };
     87 
     88 } // end namespace glslang
     89