kc3-lang/angle/src/compiler/preprocessor/Token.h

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• Hash : c3907efa
  Author :
  Date : 2018-06-08T13:03:15
  

  Always use custom float parsing in GLSL
  
  We now always use custom parsing code for parsing floats in GLSL
  shaders. Previously this code was only used in corner cases that
  stringstream parsing did not handle according to the GLSL spec.
  
  This is slightly faster in compiler perftests, and results in a
  smaller binary as well.
  
  Some new test cases are added to make sure that the custom float
  parsing behaves correctly.
  
  BUG=chromium:849245
  TEST=angle_unittests, angle_perftests
  
  Change-Id: I2a88ec6a8b427016e34519d72bc98216947a4c64
  Reviewed-on: https://chromium-review.googlesource.com/1092697
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  

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• src/compiler/preprocessor/Token.h

• //
  // 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.
  //
  
  #ifndef COMPILER_PREPROCESSOR_TOKEN_H_
  #define COMPILER_PREPROCESSOR_TOKEN_H_
  
  #include <ostream>
  #include <string>
  
  #include "compiler/preprocessor/SourceLocation.h"
  
  namespace angle
  {
  
  namespace pp
  {
  
  struct Token
  {
      enum Type
      {
          // Calling this ERROR causes a conflict with wingdi.h
          GOT_ERROR = -1,
          LAST  = 0,  // EOF.
  
          IDENTIFIER = 258,
  
          CONST_INT,
          CONST_FLOAT,
  
          OP_INC,
          OP_DEC,
          OP_LEFT,
          OP_RIGHT,
          OP_LE,
          OP_GE,
          OP_EQ,
          OP_NE,
          OP_AND,
          OP_XOR,
          OP_OR,
          OP_ADD_ASSIGN,
          OP_SUB_ASSIGN,
          OP_MUL_ASSIGN,
          OP_DIV_ASSIGN,
          OP_MOD_ASSIGN,
          OP_LEFT_ASSIGN,
          OP_RIGHT_ASSIGN,
          OP_AND_ASSIGN,
          OP_XOR_ASSIGN,
          OP_OR_ASSIGN,
  
          // Preprocessing token types.
          // These types are used by the preprocessor internally.
          // Preprocessor clients must not depend or check for them.
          PP_HASH,
          PP_NUMBER,
          PP_OTHER
      };
      enum Flags
      {
          AT_START_OF_LINE   = 1 << 0,
          HAS_LEADING_SPACE  = 1 << 1,
          EXPANSION_DISABLED = 1 << 2
      };
  
      Token() : type(0), flags(0) {}
  
      void reset();
      bool equals(const Token &other) const;
  
      // Returns true if this is the first token on line.
      // It disregards any leading whitespace.
      bool atStartOfLine() const { return (flags & AT_START_OF_LINE) != 0; }
      void setAtStartOfLine(bool start);
  
      bool hasLeadingSpace() const { return (flags & HAS_LEADING_SPACE) != 0; }
      void setHasLeadingSpace(bool space);
  
      bool expansionDisabled() const { return (flags & EXPANSION_DISABLED) != 0; }
      void setExpansionDisabled(bool disable);
  
      // Converts text into numeric value for CONST_INT and CONST_FLOAT token.
      // Returns false if the parsed value cannot fit into an int or float.
      bool iValue(int *value) const;
      bool uValue(unsigned int *value) const;
  
      int type;
      unsigned int flags;
      SourceLocation location;
      std::string text;
  };
  
  inline bool operator==(const Token &lhs, const Token &rhs)
  {
      return lhs.equals(rhs);
  }
  
  inline bool operator!=(const Token &lhs, const Token &rhs)
  {
      return !lhs.equals(rhs);
  }
  
  std::ostream &operator<<(std::ostream &out, const Token &token);
  
  }  // namespace pp
  
  }  // namespace angle
  
  #endif  // COMPILER_PREPROCESSOR_TOKEN_H_
  

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