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#ifndef TL_FILE_STREAM_HPP
#define TL_FILE_STREAM_HPP
class input_stream
{
public:
virtual ~input_stream() {}
virtual size_t read(void *data, size_t size) = 0;
virtual size_t size() = 0;
};
class output_stream
{
public:
virtual ~output_stream() {}
virtual size_t write(const void *data, size_t size) = 0;
};
// input wrapping
// RAII style
class file_backend
{
private:
file_backend(const file_backend &other) { /* no copy allowed */ }
protected:
IOHANDLE file_handle;
explicit file_backend(const char *filename, int flags)
{
file_handle = io_open(filename, flags);
}
~file_backend()
{
if(file_handle)
io_close(file_handle);
}
public:
bool is_open() const { return file_handle != 0; }
};
class file_reader : public input_stream, public file_backend
{
public:
explicit file_reader(const char *filename)
: file_backend(filename, IOFLAG_READ)
{}
virtual size_t read(void *data, size_t size) { return io_read(file_handle, data, size); }
virtual size_t size() { return io_length(file_handle); }
};
class file_writer : public output_stream, public file_backend
{
public:
explicit file_writer(const char *filename)
: file_backend(filename, IOFLAG_WRITE)
{}
virtual size_t write(const void *data, size_t size) { return io_write(file_handle, data, size); }
};
#endif
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