invalid_seekable_read_stream.h

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// Copyright 2019 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef TESTING_INVALID_SEEKABLE_READ_STREAM_H_
#define TESTING_INVALID_SEEKABLE_READ_STREAM_H_
 
#include "core/fxcrt/fx_stream.h"
#include "core/fxcrt/retain_ptr.h"
 
// A stream used for testing where reads always fail.
class InvalidSeekableReadStream final : public IFX_SeekableReadStream {
 public:
  CONSTRUCT_VIA_MAKE_RETAIN;
 
  // IFX_SeekableReadStream overrides:
  bool ReadBlockAtOffset(pdfium::span<uint8_t> buffer,
                         FX_FILESIZE offset) override;
  FX_FILESIZE GetSize() override;
 
 private:
  explicit InvalidSeekableReadStream(FX_FILESIZE data_size);
  ~InvalidSeekableReadStream() override;
 
  const FX_FILESIZE data_size_;
};
 
#endif  // TESTING_INVALID_SEEKABLE_READ_STREAM_H_