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#ifndef OPENMW_CONSTRAINEDFILESTREAMBUF_H
#define OPENMW_CONSTRAINEDFILESTREAMBUF_H
#include <filesystem>
#include <streambuf>
#include <components/platform/file.hpp>
namespace Files
{
/// A file streambuf constrained to a specific region in the file, specified by the 'start' and 'length' parameters.
class ConstrainedFileStreamBuf final : public std::streambuf
{
public:
ConstrainedFileStreamBuf(const std::filesystem::path& fname, std::size_t start, std::size_t length);
int_type underflow() final;
pos_type seekoff(off_type offset, std::ios_base::seekdir whence, std::ios_base::openmode mode) final;
pos_type seekpos(pos_type pos, std::ios_base::openmode mode) final;
private:
std::size_t mOrigin;
std::size_t mSize;
Platform::File::ScopedHandle mFile;
char mBuffer[8192]{ 0 };
};
}
#endif
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