28 lines
652 B
Go
28 lines
652 B
Go
package upload
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import (
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"iter"
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"golang.org/x/exp/constraints"
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)
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type Chunk[I constraints.Integer] struct {
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Offset I
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Size I
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}
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// Chunks yields a sequence of a part number and a Chunk. The Chunk is the offset
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// and size of the chunk. The last chunk may be smaller than chunkSize if size is
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// not a multiple of chunkSize.
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//
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// The first part number is 1 and increases monotonically.
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func Chunks[I constraints.Integer](size, chunkSize I) iter.Seq2[int, Chunk[I]] {
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return func(yield func(int, Chunk[I]) bool) {
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var n int
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for off := I(0); off < size; off += chunkSize {
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n++
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yield(n, Chunk[I]{off, min(chunkSize, size-off)})
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}
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}
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}
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