MemoryBufferFile.cc

Go to the documentation of this file.

#include "MemoryBufferFile.hh"
#include "File.hh"
#include "FileException.hh"
#include "ranges.hh"
#include <memory>
 
namespace openmsx {
 
void MemoryBufferFile::read(std::span<uint8_t> dst)
{
        if (getSize() < (getPos() + dst.size())) {
                throw FileException("Read beyond end of file");
        }
        ranges::copy(buffer.subspan(pos, dst.size()), dst);
        pos += dst.size();
}
 
void MemoryBufferFile::write(std::span<const uint8_t> /*src*/)
{
        throw FileException("Writing to MemoryBufferFile not supported");
}
 
size_t MemoryBufferFile::getSize()
{
        return buffer.size();
}
 
void MemoryBufferFile::seek(size_t newPos)
{
        pos = newPos;
}
 
size_t MemoryBufferFile::getPos()
{
        return pos;
}
 
void MemoryBufferFile::flush()
{
        // nothing
}
 
const std::string& MemoryBufferFile::getURL() const
{
        static const std::string EMPTY;
        return EMPTY;
}
 
bool MemoryBufferFile::isReadOnly() const
{
        return true;
}
 
time_t MemoryBufferFile::getModificationDate()
{
        return 0;
}
 
 
File memory_buffer_file(std::span<const uint8_t> buffer)
{
        return File(std::make_unique<MemoryBufferFile>(buffer));
}
 
} // namespace openmsx