// Because unused fields are filled with NULs, we need
	// to skip leading NULs. Fields may also be padded with
	// spaces or NULs.
	// So we remove leading and trailing NULs and spaces to
	// be sure.
	b = bytes.Trim(b, " \x00")

	if len(b) == 0 {
		return 0
	}
	x, perr := strconv.ParseUint(p.parseString(b), 8, 64)
	if perr != nil {
		p.err = ErrHeader
	}
	return int64(x)
}

pkg bytes, func ToTitleSpecial(unicode.SpecialCase, []uint8) []uint8
pkg bytes, func ToUpper([]uint8) []uint8
pkg bytes, func ToUpperSpecial(unicode.SpecialCase, []uint8) []uint8
pkg bytes, func Trim([]uint8, string) []uint8
pkg bytes, func TrimFunc([]uint8, func(int32) bool) []uint8
pkg bytes, func TrimLeft([]uint8, string) []uint8
pkg bytes, func TrimLeftFunc([]uint8, func(int32) bool) []uint8

pkg debug/pe, const IMAGE_FILE_32BIT_MACHINE = 256
pkg debug/pe, const IMAGE_FILE_32BIT_MACHINE ideal-int
pkg debug/pe, const IMAGE_FILE_AGGRESIVE_WS_TRIM = 16
pkg debug/pe, const IMAGE_FILE_AGGRESIVE_WS_TRIM ideal-int
pkg debug/pe, const IMAGE_FILE_BYTES_REVERSED_HI = 32768
pkg debug/pe, const IMAGE_FILE_BYTES_REVERSED_HI ideal-int
pkg debug/pe, const IMAGE_FILE_BYTES_REVERSED_LO = 128

func containsRune(s string, r rune) bool {
	for _, c := range s {
		if c == r {
			return true
		}
	}
	return false
}

// Trim returns a subslice of s by slicing off all leading and
// trailing UTF-8-encoded code points contained in cutset.
func Trim(s []byte, cutset string) []byte {
	if len(s) == 0 {
		// This is what we've historically done.
		return nil
	}
	if cutset == "" {
		return s
	}

	{"Trim", "\u2C6F\u2C6F\u0250\u0250\u2C6F\u2C6F", "\u2C6F", "\u0250\u0250"},
	{"Trim", "\x80test\xff", "\xff", "test"},
	{"Trim", " Ġ ", " ", "Ġ"},
	{"Trim", " Ġİ0", "0 ", "Ġİ"},
	//empty string tests
	{"Trim", "abba", "", "abba"},
	{"Trim", "", "123", ""},
	{"Trim", "", "", ""},
	{"TrimLeft", "abba", "", "abba"},
	{"TrimLeft", "", "123", ""},
	{"TrimLeft", "", "", ""},
	{"TrimRight", "abba", "", "abba"},

	fmt.Printf("%s\n", bytes.ToValidUTF8([]byte("\xed\xa0\x80"), []byte("abc")))
	// Output:
	// abc
	// abc
	// abc
}

func ExampleTrim() {
	fmt.Printf("[%q]", bytes.Trim([]byte(" !!! Achtung! Achtung! !!! "), "! "))
	// Output: ["Achtung! Achtung"]
}

func ExampleTrimFunc() {
	fmt.Println(string(bytes.TrimFunc([]byte("go-gopher!"), unicode.IsLetter)))

	FCFIDS F1, F2                   // ec400e9c
	FCFIDSCC F1, F2                 // ec400e9d
	FRES F1, F2                     // ec400830
	FRESCC F1, F2                   // ec400831
	FRIM F1, F2                     // fc400bd0
	FRIMCC F1, F2                   // fc400bd1
	FRIP F1, F2                     // fc400b90
	FRIPCC F1, F2                   // fc400b91
	FRIZ F1, F2                     // fc400b50