1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/angle/src/compiler/preprocessor/Preprocessor.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,142 @@
1.4 +//
1.5 +// Copyright (c) 2011 The ANGLE Project Authors. All rights reserved.
1.6 +// Use of this source code is governed by a BSD-style license that can be
1.7 +// found in the LICENSE file.
1.8 +//
1.9 +
1.10 +#include "Preprocessor.h"
1.11 +
1.12 +#include <cassert>
1.13 +#include <sstream>
1.14 +
1.15 +#include "DiagnosticsBase.h"
1.16 +#include "DirectiveParser.h"
1.17 +#include "Macro.h"
1.18 +#include "MacroExpander.h"
1.19 +#include "Token.h"
1.20 +#include "Tokenizer.h"
1.21 +
1.22 +namespace pp
1.23 +{
1.24 +
1.25 +struct PreprocessorImpl
1.26 +{
1.27 + Diagnostics* diagnostics;
1.28 + MacroSet macroSet;
1.29 + Tokenizer tokenizer;
1.30 + DirectiveParser directiveParser;
1.31 + MacroExpander macroExpander;
1.32 +
1.33 + PreprocessorImpl(Diagnostics* diag,
1.34 + DirectiveHandler* directiveHandler) :
1.35 + diagnostics(diag),
1.36 + tokenizer(diag),
1.37 + directiveParser(&tokenizer, ¯oSet, diag, directiveHandler),
1.38 + macroExpander(&directiveParser, ¯oSet, diag)
1.39 + {
1.40 + }
1.41 +};
1.42 +
1.43 +Preprocessor::Preprocessor(Diagnostics* diagnostics,
1.44 + DirectiveHandler* directiveHandler)
1.45 +{
1.46 + mImpl = new PreprocessorImpl(diagnostics, directiveHandler);
1.47 +}
1.48 +
1.49 +Preprocessor::~Preprocessor()
1.50 +{
1.51 + delete mImpl;
1.52 +}
1.53 +
1.54 +bool Preprocessor::init(size_t count,
1.55 + const char* const string[],
1.56 + const int length[])
1.57 +{
1.58 + static const int kGLSLVersion = 100;
1.59 +
1.60 + // Add standard pre-defined macros.
1.61 + predefineMacro("__LINE__", 0);
1.62 + predefineMacro("__FILE__", 0);
1.63 + predefineMacro("__VERSION__", kGLSLVersion);
1.64 + predefineMacro("GL_ES", 1);
1.65 +
1.66 + return mImpl->tokenizer.init(count, string, length);
1.67 +}
1.68 +
1.69 +void Preprocessor::predefineMacro(const char* name, int value)
1.70 +{
1.71 + std::ostringstream stream;
1.72 + stream << value;
1.73 +
1.74 + Token token;
1.75 + token.type = Token::CONST_INT;
1.76 + token.text = stream.str();
1.77 +
1.78 + Macro macro;
1.79 + macro.predefined = true;
1.80 + macro.type = Macro::kTypeObj;
1.81 + macro.name = name;
1.82 + macro.replacements.push_back(token);
1.83 +
1.84 + mImpl->macroSet[name] = macro;
1.85 +}
1.86 +
1.87 +void Preprocessor::lex(Token* token)
1.88 +{
1.89 + bool validToken = false;
1.90 + while (!validToken)
1.91 + {
1.92 + mImpl->macroExpander.lex(token);
1.93 + switch (token->type)
1.94 + {
1.95 + // We should not be returning internal preprocessing tokens.
1.96 + // Convert preprocessing tokens to compiler tokens or report
1.97 + // diagnostics.
1.98 + case Token::PP_HASH:
1.99 + assert(false);
1.100 + break;
1.101 + case Token::CONST_INT:
1.102 + {
1.103 + int val = 0;
1.104 + if (!token->iValue(&val))
1.105 + {
1.106 + // Do not mark the token as invalid.
1.107 + // Just emit the diagnostic and reset value to 0.
1.108 + mImpl->diagnostics->report(Diagnostics::INTEGER_OVERFLOW,
1.109 + token->location, token->text);
1.110 + token->text.assign("0");
1.111 + }
1.112 + validToken = true;
1.113 + break;
1.114 + }
1.115 + case Token::CONST_FLOAT:
1.116 + {
1.117 + float val = 0;
1.118 + if (!token->fValue(&val))
1.119 + {
1.120 + // Do not mark the token as invalid.
1.121 + // Just emit the diagnostic and reset value to 0.0.
1.122 + mImpl->diagnostics->report(Diagnostics::FLOAT_OVERFLOW,
1.123 + token->location, token->text);
1.124 + token->text.assign("0.0");
1.125 + }
1.126 + validToken = true;
1.127 + break;
1.128 + }
1.129 + case Token::PP_NUMBER:
1.130 + mImpl->diagnostics->report(Diagnostics::INVALID_NUMBER,
1.131 + token->location, token->text);
1.132 + break;
1.133 + case Token::PP_OTHER:
1.134 + mImpl->diagnostics->report(Diagnostics::INVALID_CHARACTER,
1.135 + token->location, token->text);
1.136 + break;
1.137 + default:
1.138 + validToken = true;
1.139 + break;
1.140 + }
1.141 + }
1.142 +}
1.143 +
1.144 +} // namespace pp
1.145 +
