forked from TrueCloudLab/frostfs-node
[#53] object/util: Add seek range function to range traverser
Add SetSeekRange method to RangeTraverser that switches traverser to work with provided object payload range. Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>support/v0.27
parent
8791c4f0a5
commit
834a8597c5
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@ -104,3 +104,33 @@ func (c *RangeTraverser) PushSuccessSize(sz uint64) {
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c.chain = c.chain.next
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}
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}
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// SetSeekRange moves the chain to the specified range.
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// The range is expected to be within the filled chain.
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func (c *RangeTraverser) SetSeekRange(r *objectSDK.Range) {
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ln, off := r.GetLength(), r.GetOffset()
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for {
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if off < c.chain.bounds.left {
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if c.chain.prev == nil {
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break
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}
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c.chain = c.chain.prev
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} else if off >= c.chain.bounds.left && off < c.chain.bounds.right {
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break
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} else if off >= c.chain.bounds.right {
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if c.chain.next == nil {
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break
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}
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c.chain = c.chain.next
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}
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}
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if c.seekBounds == nil {
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c.seekBounds = new(rangeBounds)
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}
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c.seekBounds.left, c.seekBounds.right = off, off+ln
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}
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