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// SPDX-License-Identifier: BSD-2-Clause
// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
package main
// validateBitZeros checks if the first n bits of a byte slice are all zeros.
func validateBitZeros(bs []byte, n uint) bool {
q := n / 8
r := n % 8
for i := range q {
if bs[i] != 0 {
return false
}
}
if r > 0 {
mask := byte(0xFF << (8 - r))
if bs[q]&mask != 0 {
return false
}
}
return true
}
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