kc3-lang/angle/src/compiler/preprocessor/Preprocessor.cpp

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• Hash : 6cb4c7f0
  Author :
  Date : 2015-08-13T11:27:17
  

  Set __VERSION__ macro when the #version directive is parsed
  
  __VERSION__ macro needs to be set to 300 when #version 300 es is on the
  first line of the shader, since section 3.4 of ESSL 3.00.4 spec mentions
  that the value of __VERSION__ should match the shading language being
  parsed. The value from parsing the version directive replaces the default
  value 100.
  
  BUG=angleproject:524
  TEST=dEQP-GLES3.functional.shaders.preprocessor.predefined_macros.*
       (4 tests start passing, 2 still fail)
       dEQP-GLES3.functional.shaders.preprocessor.conditionals.*
       (2 tests start passing)
       dEQP-GLES2.functional.shaders.preprocessor.predefined_macros.*
       (no regression)
  
  Change-Id: I15bfdeb73d1e343d131ded56b1fd52ca5ef32408
  Reviewed-on: https://chromium-review.googlesource.com/293440
  Reviewed-by: Zhenyao Mo <zmo@chromium.org>
  Tested-by: Olli Etuaho <oetuaho@nvidia.com>
  

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• src/compiler/preprocessor/Preprocessor.cpp

• //
  // Copyright (c) 2011 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  #include "Preprocessor.h"
  
  #include <cassert>
  
  #include "DiagnosticsBase.h"
  #include "DirectiveParser.h"
  #include "Macro.h"
  #include "MacroExpander.h"
  #include "Token.h"
  #include "Tokenizer.h"
  
  namespace pp
  {
  
  struct PreprocessorImpl
  {
      Diagnostics *diagnostics;
      MacroSet macroSet;
      Tokenizer tokenizer;
      DirectiveParser directiveParser;
      MacroExpander macroExpander;
  
      PreprocessorImpl(Diagnostics *diag,
                       DirectiveHandler *directiveHandler)
          : diagnostics(diag),
            tokenizer(diag),
            directiveParser(&tokenizer, &macroSet, diag, directiveHandler),
            macroExpander(&directiveParser, &macroSet, diag)
      {
      }
  };
  
  Preprocessor::Preprocessor(Diagnostics *diagnostics,
                             DirectiveHandler *directiveHandler)
  {
      mImpl = new PreprocessorImpl(diagnostics, directiveHandler);
  }
  
  Preprocessor::~Preprocessor()
  {
      delete mImpl;
  }
  
  bool Preprocessor::init(size_t count,
                          const char * const string[],
                          const int length[])
  {
      static const int kDefaultGLSLVersion = 100;
  
      // Add standard pre-defined macros.
      predefineMacro("__LINE__", 0);
      predefineMacro("__FILE__", 0);
      predefineMacro("__VERSION__", kDefaultGLSLVersion);
      predefineMacro("GL_ES", 1);
  
      return mImpl->tokenizer.init(count, string, length);
  }
  
  void Preprocessor::predefineMacro(const char *name, int value)
  {
      PredefineMacro(&mImpl->macroSet, name, value);
  }
  
  void Preprocessor::lex(Token *token)
  {
      bool validToken = false;
      while (!validToken)
      {
          mImpl->macroExpander.lex(token);
          switch (token->type)
          {
            // We should not be returning internal preprocessing tokens.
            // Convert preprocessing tokens to compiler tokens or report
            // diagnostics.
            case Token::PP_HASH:
              assert(false);
              break;
            case Token::PP_NUMBER:
              mImpl->diagnostics->report(Diagnostics::PP_INVALID_NUMBER,
                                         token->location, token->text);
              break;
            case Token::PP_OTHER:
              mImpl->diagnostics->report(Diagnostics::PP_INVALID_CHARACTER,
                                         token->location, token->text);
              break;
            default:
              validToken = true;
              break;
          }
      }
  }
  
  void Preprocessor::setMaxTokenSize(size_t maxTokenSize)
  {
      mImpl->tokenizer.setMaxTokenSize(maxTokenSize);
  }
  
  }  // namespace pp
  

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