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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 #include "ParseHelper.h"
     42 
     43 namespace glslang {
     44 
     45 class TPpContext;
     46 class TPpToken;
     47 class TParserToken;
     48 
     49 class TScanContext {
     50 public:
     51     explicit TScanContext(TParseContextBase& pc) : parseContext(pc), afterType(false), field(false) { }
     52     virtual ~TScanContext() { }
     53 
     54     static void fillInKeywordMap();
     55     static void deleteKeywordMap();
     56 
     57     int tokenize(TPpContext*, TParserToken&);
     58 
     59 protected:
     60     TScanContext(TScanContext&);
     61     TScanContext& operator=(TScanContext&);
     62 
     63     int tokenizeIdentifier();
     64     int identifierOrType();
     65     int reservedWord();
     66     int identifierOrReserved(bool reserved);
     67     int es30ReservedFromGLSL(int version);
     68     int nonreservedKeyword(int esVersion, int nonEsVersion);
     69     int precisionKeyword();
     70     int matNxM();
     71     int dMat();
     72     int firstGenerationImage(bool inEs310);
     73     int secondGenerationImage();
     74 
     75     TParseContextBase& parseContext;
     76     bool afterType;           // true if we've recognized a type, so can only be looking for an identifier
     77     bool field;               // true if we're on a field, right after a '.'
     78     TSourceLoc loc;
     79     TParserToken* parserToken;
     80     TPpToken* ppToken;
     81 
     82     const char* tokenText;
     83     int keyword;
     84 };
     85 
     86 } // end namespace glslang
     87