kc3-lang/angle/src/libGLESv2/BinaryStream.h

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• Author : Ehsan Akhgari
  Date : 2014-07-05 21:13:11
  Hash : aa7e1660
  Message : Improve the const correctness. This improvement to the const correctness makes ProgramBinary::save compile with clang-cl as well, which is more strict than MSVC. Change-Id: Iae091643fa1df7f094b89dbe7529c4e173f04a6d Reviewed-on: https://chromium-review.googlesource.com/206714 Tested-by: <ehsan@mozilla.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>

• src/libGLESv2/BinaryStream.h

• //
  // Copyright (c) 2012 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.
  //
  
  // BinaryStream.h: Provides binary serialization of simple types.
  
  #ifndef LIBGLESV2_BINARYSTREAM_H_
  #define LIBGLESV2_BINARYSTREAM_H_
  
  #include "common/angleutils.h"
  #include "common/mathutil.h"
  
  namespace gl
  {
  
  class BinaryInputStream
  {
    public:
      BinaryInputStream(const void *data, size_t length)
      {
          mError = false;
          mOffset = 0;
          mData = static_cast<const char*>(data);
          mLength = length;
      }
  
      // readInt will generate an error for bool types
      template <class IntT>
      IntT readInt()
      {
          int value;
          read(&value);
          return static_cast<IntT>(value);
      }
  
      template <class IntT>
      void readInt(IntT *outValue)
      {
          *outValue = readInt<IntT>();
      }
  
      bool readBool()
      {
          int value;
          read(&value);
          return (value > 0);
      }
  
      void readBool(bool *outValue)
      {
          *outValue = readBool();
      }
  
      void readBytes(unsigned char outArray[], size_t count)
      {
          read<unsigned char>(outArray, count);
      }
  
      std::string readString()
      {
          std::string outString;
          readString(&outString);
          return outString;
      }
  
      void readString(std::string *v)
      {
          size_t length;
          readInt(&length);
  
          if (mError)
          {
              return;
          }
  
          if (mOffset + length > mLength)
          {
              mError = true;
              return;
          }
  
          v->assign(mData + mOffset, length);
          mOffset += length;
      }
  
      void skip(size_t length)
      {
          if (mOffset + length > mLength)
          {
              mError = true;
              return;
          }
  
          mOffset += length;
      }
  
      size_t offset() const
      {
          return mOffset;
      }
  
      bool error() const
      {
          return mError;
      }
  
      bool endOfStream() const
      {
          return mOffset == mLength;
      }
  
    private:
      DISALLOW_COPY_AND_ASSIGN(BinaryInputStream);
      bool mError;
      size_t mOffset;
      const char *mData;
      size_t mLength;
  
      template <typename T>
      void read(T *v, size_t num)
      {
          META_ASSERT(std::is_fundamental<T>::value);
  
          size_t length = num * sizeof(T);
  
          if (mOffset + length > mLength)
          {
              mError = true;
              return;
          }
  
          memcpy(v, mData + mOffset, length);
          mOffset += length;
      }
  
      template <typename T>
      void read(T *v)
      {
          read(v, 1);
      }
  
  };
  
  class BinaryOutputStream
  {
    public:
      BinaryOutputStream()
      {
      }
  
      // writeInt also handles bool types
      template <class IntT>
      void writeInt(IntT param)
      {
          ASSERT(rx::IsIntegerCastSafe<int>(param));
          int intValue = static_cast<int>(param);
          write(&intValue, 1);
      }
  
      void writeString(const std::string &v)
      {
          writeInt(v.length());
          write(v.c_str(), v.length());
      }
  
      void writeBytes(const unsigned char *bytes, size_t count)
      {
          write(bytes, count);
      }
  
      size_t length() const
      {
          return mData.size();
      }
  
      const void* data() const
      {
          return mData.size() ? &mData[0] : NULL;
      }
  
    private:
      DISALLOW_COPY_AND_ASSIGN(BinaryOutputStream);
      std::vector<char> mData;
  
      template <typename T>
      void write(const T *v, size_t num)
      {
          META_ASSERT(std::is_fundamental<T>::value);
          const char *asBytes = reinterpret_cast<const char*>(v);
          mData.insert(mData.end(), asBytes, asBytes + num * sizeof(T));
      }
  
  };
  }
  
  #endif  // LIBGLESV2_BINARYSTREAM_H_