Line data    Source code

       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 "compiler/preprocessor/Preprocessor.h"
       8             : 
       9             : #include "common/debug.h"
      10             : #include "compiler/preprocessor/DiagnosticsBase.h"
      11             : #include "compiler/preprocessor/DirectiveParser.h"
      12             : #include "compiler/preprocessor/Macro.h"
      13             : #include "compiler/preprocessor/MacroExpander.h"
      14             : #include "compiler/preprocessor/Token.h"
      15             : #include "compiler/preprocessor/Tokenizer.h"
      16             : 
      17             : namespace pp
      18             : {
      19             : 
      20           0 : struct PreprocessorImpl
      21             : {
      22             :     Diagnostics *diagnostics;
      23             :     MacroSet macroSet;
      24             :     Tokenizer tokenizer;
      25             :     DirectiveParser directiveParser;
      26             :     MacroExpander macroExpander;
      27             : 
      28           0 :     PreprocessorImpl(Diagnostics *diag,
      29             :                      DirectiveHandler *directiveHandler,
      30             :                      const PreprocessorSettings &settings)
      31           0 :         : diagnostics(diag),
      32             :           tokenizer(diag),
      33             :           directiveParser(&tokenizer,
      34             :                           &macroSet,
      35             :                           diag,
      36             :                           directiveHandler,
      37           0 :                           settings.maxMacroExpansionDepth),
      38           0 :           macroExpander(&directiveParser, &macroSet, diag, settings.maxMacroExpansionDepth)
      39             :     {
      40           0 :     }
      41             : };
      42             : 
      43           0 : Preprocessor::Preprocessor(Diagnostics *diagnostics,
      44             :                            DirectiveHandler *directiveHandler,
      45           0 :                            const PreprocessorSettings &settings)
      46             : {
      47           0 :     mImpl = new PreprocessorImpl(diagnostics, directiveHandler, settings);
      48           0 : }
      49             : 
      50           0 : Preprocessor::~Preprocessor()
      51             : {
      52           0 :     delete mImpl;
      53           0 : }
      54             : 
      55           0 : bool Preprocessor::init(size_t count,
      56             :                         const char * const string[],
      57             :                         const int length[])
      58             : {
      59             :     static const int kDefaultGLSLVersion = 100;
      60             : 
      61             :     // Add standard pre-defined macros.
      62           0 :     predefineMacro("__LINE__", 0);
      63           0 :     predefineMacro("__FILE__", 0);
      64           0 :     predefineMacro("__VERSION__", kDefaultGLSLVersion);
      65           0 :     predefineMacro("GL_ES", 1);
      66             : 
      67           0 :     return mImpl->tokenizer.init(count, string, length);
      68             : }
      69             : 
      70           0 : void Preprocessor::predefineMacro(const char *name, int value)
      71             : {
      72           0 :     PredefineMacro(&mImpl->macroSet, name, value);
      73           0 : }
      74             : 
      75           0 : void Preprocessor::lex(Token *token)
      76             : {
      77           0 :     bool validToken = false;
      78           0 :     while (!validToken)
      79             :     {
      80           0 :         mImpl->macroExpander.lex(token);
      81           0 :         switch (token->type)
      82             :         {
      83             :           // We should not be returning internal preprocessing tokens.
      84             :           // Convert preprocessing tokens to compiler tokens or report
      85             :           // diagnostics.
      86             :           case Token::PP_HASH:
      87           0 :               UNREACHABLE();
      88             :               break;
      89             :           case Token::PP_NUMBER:
      90           0 :             mImpl->diagnostics->report(Diagnostics::PP_INVALID_NUMBER,
      91           0 :                                        token->location, token->text);
      92           0 :             break;
      93             :           case Token::PP_OTHER:
      94           0 :             mImpl->diagnostics->report(Diagnostics::PP_INVALID_CHARACTER,
      95           0 :                                        token->location, token->text);
      96           0 :             break;
      97             :           default:
      98           0 :             validToken = true;
      99           0 :             break;
     100             :         }
     101             :     }
     102           0 : }
     103             : 
     104           0 : void Preprocessor::setMaxTokenSize(size_t maxTokenSize)
     105             : {
     106           0 :     mImpl->tokenizer.setMaxTokenSize(maxTokenSize);
     107           0 : }
     108             : 
     109             : }  // namespace pp