bfs_tools/lib/Inode.cpp

657 DataStream::FindBlockRun(off_t pos)
661 	if (pos > fInode->data.size)
672 	if (fCurrent >= 0 && pos >= fRunFileOffset && pos < fRunBlockEnd)
678 		&& pos >= fInode->data.max_direct_range) {
680 			&& pos >= fInode->data.max_indirect_range) {
688 			off_t start = pos - fInode->data.max_indirect_range;
713 			if (fLevel != 1 || pos < fRunFileOffset) {
725 				if (fRunBlockEnd > pos)
737 		if (fRunFileOffset > pos) {
749 			if (fRunBlockEnd > pos)
763 DataStream::ReadAt(off_t pos, void *buffer, size_t size)
767 	//printf("DataStream::ReadAt(pos = %Ld,buffer = %p,size = %ld);\n",pos,buffer,size);
769 	if (pos + size > fInode->data.size) {
770 		if (pos > fInode->data.size)	// reading outside the file
773 		size = fInode->data.size - pos;
779 	//printf("### read %ld bytes at %Ld\n",size,pos);
781 		status_t status = FindBlockRun(pos);
785 		ssize_t bytes = min_c(size, fRunBlockEnd - pos);
787 		//printf("### read %ld bytes from %Ld\n### --\n",bytes,fDisk->ToOffset(fRun) + pos - fRunFileOffset);
788 		bytes = fDisk->ReadAt(fDisk->ToOffset(fRun) + pos - fRunFileOffset,
800 		pos += bytes;
811 DataStream::WriteAt(off_t pos, const void *buffer, size_t size)
816 	if (pos + size > fInode->data.size) {
817 		if (pos > fInode->data.size)	// writing outside the file
820 		size = fInode->data.size - pos;
826 	//printf("### write %ld bytes at %Ld\n",size,pos);
828 		status_t status = FindBlockRun(pos);
832 		ssize_t bytes = min_c(size,fRunBlockEnd - pos);
834 		//printf("### write %ld bytes to %Ld\n### --\n",bytes,fDisk->ToOffset(fRun) + pos - fRunFileOffset);
835 		bytes = fDisk->WriteAt(fDisk->ToOffset(fRun) + pos - fRunFileOffset,buffer,bytes);
841 		pos += bytes;