kc3-lang/angle/src/compiler/InfoSink.h

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• Author : alokp@chromium.org
  Date : 2010-09-15 21:18:34
  Hash : 7beea408
  Message : Added API to query for active attribs and uniforms. These functions are modeled after glGetShaderiv, glGetProgramiv, glGetActiveAttrib, and glGetActiveUniform. The main difference between this and OpenGL API is that we do not have programs - just shaders. BUG=26 Review URL: http://codereview.appspot.com/2183041 git-svn-id: https://angleproject.googlecode.com/svn/trunk@425 736b8ea6-26fd-11df-bfd4-992fa37f6226

• src/compiler/InfoSink.h

• //
  // Copyright (c) 2002-2010 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 _INFOSINK_INCLUDED_
  #define _INFOSINK_INCLUDED_
  
  #include <math.h>
  #include "compiler/Common.h"
  
  // Returns the fractional part of the given floating-point number.
  inline float fractionalPart(float f) {
    float intPart = 0.0f;
    return modff(f, &intPart);
  }
  
  //
  // TPrefixType is used to centralize how info log messages start.
  // See below.
  //
  enum TPrefixType {
      EPrefixNone,
      EPrefixWarning,
      EPrefixError,
      EPrefixInternalError,
      EPrefixUnimplemented,
      EPrefixNote
  };
  
  //
  // Encapsulate info logs for all objects that have them.
  //
  // The methods are a general set of tools for getting a variety of
  // messages and types inserted into the log.
  //
  class TInfoSinkBase {
  public:
      TInfoSinkBase() {}
  
      template <typename T>
      TInfoSinkBase& operator<<(const T& t) {
          TPersistStringStream stream;
          stream << t;
          sink.append(stream.str());
          return *this;
      }
      // Override << operator for specific types. It is faster to append strings
      // and characters directly to the sink.
      TInfoSinkBase& operator<<(char c) {
          sink.append(1, c);
          return *this;
      }
      TInfoSinkBase& operator<<(const char* str) {
          sink.append(str);
          return *this;
      }
      TInfoSinkBase& operator<<(const TPersistString& str) {
          sink.append(str);
          return *this;
      }
      TInfoSinkBase& operator<<(const TString& str) {
          sink.append(str.c_str());
          return *this;
      }
      // Make sure floats are written with correct precision.
      TInfoSinkBase& operator<<(float f) {
          // Make sure that at least one decimal point is written. If a number
          // does not have a fractional part, the default precision format does
          // not write the decimal portion which gets interpreted as integer by
          // the compiler.
          TPersistStringStream stream;
          if (fractionalPart(f) == 0.0f) {
              stream.precision(1);
              stream << std::showpoint << std::fixed << f;
          } else {
              stream.unsetf(std::ios::fixed);
              stream.unsetf(std::ios::scientific);
              stream.precision(8);
              stream << f;
          }
          sink.append(stream.str());
          return *this;
      }
      // Write boolean values as their names instead of integral value.
      TInfoSinkBase& operator<<(bool b) {
          const char* str = b ? "true" : "false";
          sink.append(str);
          return *this;
      }
  
      void erase() { sink.clear(); }
      int size() { return static_cast<int>(sink.size()); }
  
      const TPersistString& str() const { return sink; }
      const char* c_str() const { return sink.c_str(); }
  
      void prefix(TPrefixType message);
      void location(TSourceLoc loc);
      void message(TPrefixType message, const char* s);
      void message(TPrefixType message, const char* s, TSourceLoc loc);
  
  private:
      TPersistString sink;
  };
  
  class TInfoSink {
  public:
      TInfoSinkBase info;
      TInfoSinkBase debug;
      TInfoSinkBase obj;
  };
  
  #endif // _INFOSINK_INCLUDED_