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// Copyright © 2020 rsiddharth <s@ricketyspace.net>
// SPDX-License-Identifier: ISC
package lib
// Returns true if byte `b` is in `bs`
func ByteInBytes(b byte, bs []byte) bool {
for _, bi := range bs {
if b == bi {
return true
}
}
return false
}
// Returns bytes that are common in the given array of array of bytes
// `bbytes`.
func BytesInCommon(bbytes [][]byte) []byte {
var common []byte
switch l := len(bbytes); {
case l == 1:
common = make([]byte, len(bbytes[0]))
copy(common, bbytes[0])
case l > 1:
common = make([]byte, 0)
commonRest := BytesInCommon(bbytes[1:])
for _, b := range bbytes[0] {
if ByteInBytes(b, commonRest) {
common = append(common, b)
}
}
}
return common
}
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