kc3-lang/angle/src/compiler/translator/ImmutableStringBuilder.h

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• Hash : 12c03761
  Author :
  Date : 2018-01-25T12:22:33
  

  Resubmit: Use ImmutableString for HLSL texture references
  
  This fixes an issue in the original revision of this patch by adding
  a operator<< to TInfoSinkBase that takes ImmutableString as a
  parameter.
  
  This also adds ImmutableStringBuilder class, which can be used to
  build ImmutableStrings in place without extra allocations if the
  maximum length is known in advance.
  
  BUG=angleproject:2267
  TEST=angle_unittests
  
  Change-Id: I52e984657a3aba3e6fe67a82b401c6b8de557d18
  Reviewed-on: https://chromium-review.googlesource.com/890522
  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/translator/ImmutableStringBuilder.h

• //
  // Copyright (c) 2018 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.
  //
  // ImmutableStringBuilder.h: Stringstream-like utility for building pool allocated strings where the
  // maximum length is known in advance.
  //
  
  #ifndef COMPILER_TRANSLATOR_IMMUTABLESTRINGBUILDER_H_
  #define COMPILER_TRANSLATOR_IMMUTABLESTRINGBUILDER_H_
  
  #include "compiler/translator/ImmutableString.h"
  
  namespace sh
  {
  
  class ImmutableStringBuilder
  {
    public:
      ImmutableStringBuilder(size_t maxLength)
          : mPos(0u), mMaxLength(maxLength), mData(AllocateEmptyPoolCharArray(maxLength))
      {
      }
  
      ImmutableStringBuilder &operator<<(const ImmutableString &str);
  
      ImmutableStringBuilder &operator<<(const char *str);
  
      ImmutableStringBuilder &operator<<(const char &c);
  
      // This invalidates the ImmutableStringBuilder, so it should only be called once.
      operator ImmutableString();
  
    private:
      inline static char *AllocateEmptyPoolCharArray(size_t strLength)
      {
          size_t requiredSize = strLength + 1u;
          return reinterpret_cast<char *>(GetGlobalPoolAllocator()->allocate(requiredSize));
      }
  
      size_t mPos;
      size_t mMaxLength;
      char *mData;
  };
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_IMMUTABLESTRINGBUILDER_H_
  

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