byteseq.go

package utils

type byteSeq interface {
	~string | ~[]byte
}

// EqualFold tests ascii strings or bytes for equality case-insensitively
func EqualFold[S byteSeq](b, s S) bool {
	if len(b) != len(s) {
		return false
	}
	for i := len(b) - 1; i >= 0; i-- {
		if toUpperTable[b[i]] != toUpperTable[s[i]] {
			return false
		}
	}
	return true
}

// TrimLeft is the equivalent of strings/bytes.TrimLeft
func TrimLeft[S byteSeq](s S, cutset byte) S {
	lenStr, start := len(s), 0
	for start < lenStr && s[start] == cutset {
		start++
	}
	return s[start:]
}

// Trim is the equivalent of strings/bytes.Trim
func Trim[S byteSeq](s S, cutset byte) S {
	i, j := 0, len(s)-1
	for ; i <= j; i++ {
		if s[i] != cutset {
			break
		}
	}
	for ; i < j; j-- {
		if s[j] != cutset {
			break
		}
	}

	return s[i : j+1]
}

// TrimRight is the equivalent of strings/bytes.TrimRight
func TrimRight[S byteSeq](s S, cutset byte) S {
	lenStr := len(s)
	for lenStr > 0 && s[lenStr-1] == cutset {
		lenStr--
	}
	return s[:lenStr]
}