1 // 2 // Copyright (C) 2016 Google, 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 Google, Inc., 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 HLSL scanner, which 38 // sits between the preprocessor scanner and HLSL parser. 39 // 40 41 #ifndef HLSLSCANCONTEXT_H_ 42 #define HLSLSCANCONTEXT_H_ 43 44 #include "../glslang/MachineIndependent/ParseHelper.h" 45 #include "hlslTokens.h" 46 47 namespace glslang { 48 49 class TPpContext; 50 class TPpToken; 51 52 53 // 54 // Everything needed to fully describe a token. 55 // 56 struct HlslToken { 57 HlslToken() : string(nullptr) { loc.init(); } 58 TSourceLoc loc; // location of token in the source 59 EHlslTokenClass tokenClass; // what kind of token it is 60 union { // what data the token holds 61 glslang::TString *string; // for identifiers 62 int i; // for literals 63 unsigned int u; 64 bool b; 65 double d; 66 }; 67 }; 68 69 // 70 // The state of scanning and translating raw tokens to slightly richer 71 // semantics, like knowing if an identifier is an existing symbol, or 72 // user-defined type. 73 // 74 class HlslScanContext { 75 public: 76 HlslScanContext(TParseContextBase& parseContext, TPpContext& ppContext) 77 : parseContext(parseContext), ppContext(ppContext) { } 78 virtual ~HlslScanContext() { } 79 80 static void fillInKeywordMap(); 81 static void deleteKeywordMap(); 82 83 void tokenize(HlslToken&); 84 glslang::TBuiltInVariable mapSemantic(const char*); 85 86 protected: 87 HlslScanContext(HlslScanContext&); 88 HlslScanContext& operator=(HlslScanContext&); 89 90 EHlslTokenClass tokenizeClass(HlslToken&); 91 EHlslTokenClass tokenizeIdentifier(); 92 EHlslTokenClass identifierOrType(); 93 EHlslTokenClass reservedWord(); 94 EHlslTokenClass identifierOrReserved(bool reserved); 95 EHlslTokenClass nonreservedKeyword(int version); 96 97 TParseContextBase& parseContext; 98 TPpContext& ppContext; 99 TSourceLoc loc; 100 TPpToken* ppToken; 101 HlslToken* parserToken; 102 103 const char* tokenText; 104 EHlslTokenClass keyword; 105 }; 106 107 } // end namespace glslang 108 109 #endif // HLSLSCANCONTEXT_H_ 110
