third_party/WebKit/Source/modules/filesystem/FileWriterBase.cpp

/*
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "modules/filesystem/FileWriterBase.h"

#include "core/events/ProgressEvent.h"
#include "core/fileapi/Blob.h"
#include "core/fileapi/FileError.h"
#include "public/platform/WebFileWriter.h"
#include <memory>

namespace blink {

FileWriterBase::~FileWriterBase() {}

void FileWriterBase::Initialize(std::unique_ptr<WebFileWriter> writer,
                                long long length) {
  DCHECK(!writer_);
  DCHECK_GE(length, 0);
  writer_ = std::move(writer);
  length_ = length;
}

FileWriterBase::FileWriterBase() : position_(0) {}

void FileWriterBase::SeekInternal(long long position) {
  if (position > length_)
    position = length_;
  else if (position < 0)
    position = length_ + position;
  if (position < 0)
    position = 0;
  position_ = position;
}

void FileWriterBase::ResetWriter() {
  writer_ = nullptr;
}

void FileWriterBase::Dispose() {
  // Need to explicitly destroy m_writer in pre-finalizer, because otherwise it
  // may attempt to call methods on the FileWriter before we are finalized.
  ResetWriter();
}

}  // namespace blink