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comparison: gfx/angle/src/compiler/preprocessor/Preprocessor.cpp
gfx/angle/src/compiler/preprocessor/Preprocessor.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:bd7f678e15f5 |
|---|---|
| 1 // | |
| 2 // Copyright (c) 2011 The ANGLE Project Authors. All rights reserved. | |
| 3 // Use of this source code is governed by a BSD-style license that can be | |
| 4 // found in the LICENSE file. | |
| 5 // | |
| 6 | |
| 7 #include "Preprocessor.h" | |
| 8 | |
| 9 #include <cassert> | |
| 10 #include <sstream> | |
| 11 | |
| 12 #include "DiagnosticsBase.h" | |
| 13 #include "DirectiveParser.h" | |
| 14 #include "Macro.h" | |
| 15 #include "MacroExpander.h" | |
| 16 #include "Token.h" | |
| 17 #include "Tokenizer.h" | |
| 18 | |
| 19 namespace pp | |
| 20 { | |
| 21 | |
| 22 struct PreprocessorImpl | |
| 23 { | |
| 24 Diagnostics* diagnostics; | |
| 25 MacroSet macroSet; | |
| 26 Tokenizer tokenizer; | |
| 27 DirectiveParser directiveParser; | |
| 28 MacroExpander macroExpander; | |
| 29 | |
| 30 PreprocessorImpl(Diagnostics* diag, | |
| 31 DirectiveHandler* directiveHandler) : | |
| 32 diagnostics(diag), | |
| 33 tokenizer(diag), | |
| 34 directiveParser(&tokenizer, ¯oSet, diag, directiveHandler), | |
| 35 macroExpander(&directiveParser, ¯oSet, diag) | |
| 36 { | |
| 37 } | |
| 38 }; | |
| 39 | |
| 40 Preprocessor::Preprocessor(Diagnostics* diagnostics, | |
| 41 DirectiveHandler* directiveHandler) | |
| 42 { | |
| 43 mImpl = new PreprocessorImpl(diagnostics, directiveHandler); | |
| 44 } | |
| 45 | |
| 46 Preprocessor::~Preprocessor() | |
| 47 { | |
| 48 delete mImpl; | |
| 49 } | |
| 50 | |
| 51 bool Preprocessor::init(size_t count, | |
| 52 const char* const string[], | |
| 53 const int length[]) | |
| 54 { | |
| 55 static const int kGLSLVersion = 100; | |
| 56 | |
| 57 // Add standard pre-defined macros. | |
| 58 predefineMacro("__LINE__", 0); | |
| 59 predefineMacro("__FILE__", 0); | |
| 60 predefineMacro("__VERSION__", kGLSLVersion); | |
| 61 predefineMacro("GL_ES", 1); | |
| 62 | |
| 63 return mImpl->tokenizer.init(count, string, length); | |
| 64 } | |
| 65 | |
| 66 void Preprocessor::predefineMacro(const char* name, int value) | |
| 67 { | |
| 68 std::ostringstream stream; | |
| 69 stream << value; | |
| 70 | |
| 71 Token token; | |
| 72 token.type = Token::CONST_INT; | |
| 73 token.text = stream.str(); | |
| 74 | |
| 75 Macro macro; | |
| 76 macro.predefined = true; | |
| 77 macro.type = Macro::kTypeObj; | |
| 78 macro.name = name; | |
| 79 macro.replacements.push_back(token); | |
| 80 | |
| 81 mImpl->macroSet[name] = macro; | |
| 82 } | |
| 83 | |
| 84 void Preprocessor::lex(Token* token) | |
| 85 { | |
| 86 bool validToken = false; | |
| 87 while (!validToken) | |
| 88 { | |
| 89 mImpl->macroExpander.lex(token); | |
| 90 switch (token->type) | |
| 91 { | |
| 92 // We should not be returning internal preprocessing tokens. | |
| 93 // Convert preprocessing tokens to compiler tokens or report | |
| 94 // diagnostics. | |
| 95 case Token::PP_HASH: | |
| 96 assert(false); | |
| 97 break; | |
| 98 case Token::CONST_INT: | |
| 99 { | |
| 100 int val = 0; | |
| 101 if (!token->iValue(&val)) | |
| 102 { | |
| 103 // Do not mark the token as invalid. | |
| 104 // Just emit the diagnostic and reset value to 0. | |
| 105 mImpl->diagnostics->report(Diagnostics::INTEGER_OVERFLOW, | |
| 106 token->location, token->text); | |
| 107 token->text.assign("0"); | |
| 108 } | |
| 109 validToken = true; | |
| 110 break; | |
| 111 } | |
| 112 case Token::CONST_FLOAT: | |
| 113 { | |
| 114 float val = 0; | |
| 115 if (!token->fValue(&val)) | |
| 116 { | |
| 117 // Do not mark the token as invalid. | |
| 118 // Just emit the diagnostic and reset value to 0.0. | |
| 119 mImpl->diagnostics->report(Diagnostics::FLOAT_OVERFLOW, | |
| 120 token->location, token->text); | |
| 121 token->text.assign("0.0"); | |
| 122 } | |
| 123 validToken = true; | |
| 124 break; | |
| 125 } | |
| 126 case Token::PP_NUMBER: | |
| 127 mImpl->diagnostics->report(Diagnostics::INVALID_NUMBER, | |
| 128 token->location, token->text); | |
| 129 break; | |
| 130 case Token::PP_OTHER: | |
| 131 mImpl->diagnostics->report(Diagnostics::INVALID_CHARACTER, | |
| 132 token->location, token->text); | |
| 133 break; | |
| 134 default: | |
| 135 validToken = true; | |
| 136 break; | |
| 137 } | |
| 138 } | |
| 139 } | |
| 140 | |
| 141 } // namespace pp | |
| 142 |
