text: /*
   * Copyright 2013 Google Inc.
   *
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  #ifndef SkFrontBufferedStream_DEFINED
  #define SkFrontBufferedStream_DEFINED
  
  #include "SkTypes.h"
  
  class SkStream;
  class SkStreamRewindable;
  
  /**
   *  Specialized stream that buffers the first X bytes of a stream,
   *  where X is passed in by the user. Note that unlike some buffered
   *  stream APIs, once more bytes than can fit in the buffer are read,
   *  no more buffering is done. This stream is designed for a use case
   *  where the caller knows that rewind will only be called from within
   *  X bytes (inclusive), and the wrapped stream is not necessarily
   *  able to rewind at all.
   */
  class SkFrontBufferedStream {
  public:
      /**
       *  Creates a new stream that wraps and buffers an SkStream.
       *  @param stream SkStream to buffer. If stream is NULL, NULL is
       *      returned. When this call succeeds (i.e. returns non NULL),
       *      SkFrontBufferedStream is expected to be the only owner of
       *      stream, so it should no be longer used directly.
       *      SkFrontBufferedStream will delete stream upon deletion.
       *  @param minBufferSize Minimum size of buffer required.
       *  @return An SkStream that can buffer at least minBufferSize, or
       *      NULL on failure. The caller is required to delete when finished with
       *      this object.
       */
      static SkStreamRewindable* Create(SkStream* stream, size_t minBufferSize);
  };
  #endif  // SkFrontBufferedStream_DEFINED
  