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#pragma once
#include "coding/writer.hpp"
#include "base/base.hpp"
#include <cstddef>
#include <cstdint>
#include <memory>
#include <string>
namespace base
{
class FileData;
}
// FileWriter, not thread safe.
class FileWriter : public Writer
{
DISALLOW_COPY(FileWriter);
public:
// Values actually match internal FileData::Op enum.
enum Op
{
// Create an empty file for writing. If a file with the same name already exists
// its content is erased and the file is treated as a new empty file.
OP_WRITE_TRUNCATE = 1,
// Open a file for update. The file is created if it does not exist.
OP_WRITE_EXISTING = 2,
// Append to a file. Writing operations append data at the end of the file.
// The file is created if it does not exist.
// Seek should not be called, if file is opened for append.
OP_APPEND = 3
};
FileWriter(FileWriter && rhs);
explicit FileWriter(std::string const & fileName,
Op operation = OP_WRITE_TRUNCATE, bool bTruncOnClose = false);
~FileWriter() override;
void Seek(uint64_t pos) override;
uint64_t Pos() const override;
void Write(void const * p, size_t size) override;
void WritePaddingByEnd(size_t factor);
void WritePaddingByPos(size_t factor);
uint64_t Size() const;
void Flush();
void Reserve(uint64_t size);
static void DeleteFileX(std::string const & fName);
std::string const & GetName() const;
private:
void WritePadding(uint64_t offset, uint64_t factor);
std::unique_ptr<base::FileData> m_pFileData;
bool m_bTruncOnClose;
};
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