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#include "cru/common/io/MemoryStream.hpp"
namespace cru::io {
bool MemoryStream::CanSeek() { return true; }
Index MemoryStream::Tell() { return position_; }
void MemoryStream::Seek(Index offset, SeekOrigin origin) {
switch (origin) {
case SeekOrigin::Current:
position_ += offset;
break;
case SeekOrigin::Begin:
position_ = offset;
break;
case SeekOrigin::End:
position_ = size_ + offset;
break;
}
}
bool MemoryStream::CanRead() { return true; }
Index MemoryStream::Read(std::byte *buffer, Index offset, Index size) {
if (position_ + size > size_) {
size = size_ - position_;
}
if (size <= 0) {
return 0;
}
std::memcpy(buffer + offset, buffer_ + position_, size);
position_ += size;
return size;
}
bool MemoryStream::CanWrite() { return !read_only_; }
Index MemoryStream::Write(const std::byte *buffer, Index offset, Index size) {
if (read_only_) {
return 0;
}
if (position_ + size > size_) {
size = size_ - position_;
}
if (size <= 0) {
return 0;
}
std::memcpy(buffer_ + position_, buffer + offset, size);
position_ += size;
return size;
}
} // namespace cru::io
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