# File lib/ole/storage/base.rb, line 615 def truncate size # note that old_blocks is != @ranges.length necessarily. i'm planning to write a # merge_ranges function that merges sequential ranges into one as an optimization. @bat.resize_chain @blocks, size @pos = size if @pos > size self.ranges = @bat.ranges(@blocks, size) self.first_block = @blocks.empty? ? AllocationTable::EOC : @blocks.first # don't know if this is required, but we explicitly request our @io to grow if necessary # we never shrink it though. maybe this belongs in allocationtable, where smarter decisions # can be made. # maybe its ok to just seek out there later?? max = @ranges.map { |pos, len| pos + len }.max || 0 @io.truncate max if max > @io.size end