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29 lines
996 B
29 lines
996 B
package idx
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import (
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"github.com/seaweedfs/seaweedfs/weed/storage/types"
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)
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// firstInvalidIndex find the first index the failed lessThanOrEqualToFn function's requirement.
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func FirstInvalidIndex(bytes []byte, lessThanOrEqualToFn func(key types.NeedleId, offset types.Offset, size types.Size) (bool, error)) (int, error) {
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left, right := 0, len(bytes)/types.NeedleMapEntrySize-1
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index := right + 1
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for left <= right {
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mid := left + (right-left)>>1
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loc := mid * types.NeedleMapEntrySize
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key := types.BytesToNeedleId(bytes[loc : loc+types.NeedleIdSize])
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offset := types.BytesToOffset(bytes[loc+types.NeedleIdSize : loc+types.NeedleIdSize+types.OffsetSize])
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size := types.BytesToSize(bytes[loc+types.NeedleIdSize+types.OffsetSize : loc+types.NeedleIdSize+types.OffsetSize+types.SizeSize])
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res, err := lessThanOrEqualToFn(key, offset, size)
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if err != nil {
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return -1, err
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}
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if res {
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left = mid + 1
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} else {
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index = mid
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right = mid - 1
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}
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}
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return index, nil
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}
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