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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:
TScanContext(TParseContextBase & pc)53     explicit TScanContext(TParseContextBase& pc) :
54         parseContext(pc),
55         afterType(false), afterStruct(false),
56         field(false), afterBuffer(false) { }
~TScanContext()57     virtual ~TScanContext() { }
58 
59     static void fillInKeywordMap();
60     static void deleteKeywordMap();
61 
62     int tokenize(TPpContext*, TParserToken&);
63 
64 protected:
65     TScanContext(TScanContext&);
66     TScanContext& operator=(TScanContext&);
67 
68     int tokenizeIdentifier();
69     int identifierOrType();
70     int reservedWord();
71     int identifierOrReserved(bool reserved);
72     int es30ReservedFromGLSL(int version);
73     int nonreservedKeyword(int esVersion, int nonEsVersion);
74     int precisionKeyword();
75     int matNxM();
76     int dMat();
77     int firstGenerationImage(bool inEs310);
78     int secondGenerationImage();
79 
80     TParseContextBase& parseContext;
81     bool afterType;           // true if we've recognized a type, so can only be looking for an identifier
82     bool afterStruct;         // true if we've recognized the STRUCT keyword, so can only be looking for an identifier
83     bool field;               // true if we're on a field, right after a '.'
84     bool afterBuffer;         // true if we've recognized the BUFFER keyword
85     TSourceLoc loc;
86     TParserToken* parserToken;
87     TPpToken* ppToken;
88 
89     const char* tokenText;
90     int keyword;
91 };
92 
93 } // end namespace glslang
94