return m[i].From >= uint16(r)
	})
	if k < len(m) && m[k].From == uint16(r) {
		return Region(m[k].To)
	}
	return 0
}

const (
	iso3166UserAssigned = 1 << iota
	ccTLD
	bcp47Region
)

func (r Region) typ() byte {
	return regionTypes[r]
}

// String returns the BCP 47 representation for the region.
// It returns "ZZ" for an unspecified region.

	isFile bool

	// The kind of this file.
	kind fileKind
}

// fileKind describes the kind of file.
type fileKind byte

const (
	kindNet fileKind = iota
	kindFile
	kindConsole
	kindPipe
)

// logInitFD is set by tests to enable file descriptor initialization logging.
var logInitFD func(net string, fd *FD, err error)

const (
	zero form = iota
	finite
	inf
)

// RoundingMode determines how a [Float] value is rounded to the
// desired precision. Rounding may change the [Float] value; the
// rounding error is described by the [Float]'s [Accuracy].
type RoundingMode byte

// These constants define supported rounding modes.
const (
	ToNearestEven RoundingMode = iota // == IEEE 754-2008 roundTiesToEven

var machohdr MachoHdr

var load []MachoLoad

var machoPlatform MachoPlatform

var seg [16]MachoSeg

var nseg int

var ndebug int

var nsect int

const (
	SymKindLocal = 0 + iota
	SymKindExtdef
	SymKindUndef
	NumSymKind
)

var nkind [NumSymKind]int

var sortsym []loader.Sym

var nsortsym int

// Amount of space left for adding load commands

		return c - '0'
	case 'a' <= c && c <= 'f':
		return c - 'a' + 10
	case 'A' <= c && c <= 'F':
		return c - 'A' + 10
	}
	return 0
}

type encoding int

const (
	encodePath encoding = 1 + iota
	encodePathSegment
	encodeHost
	encodeZone
	encodeUserPassword
	encodeQueryComponent
	encodeFragment
)

type EscapeError string

func (e EscapeError) Error() string {

	Quantize(p color.Palette, m image.Image) color.Palette
}

// Op is a Porter-Duff compositing operator.
type Op int

const (
	// Over specifies ``(src in mask) over dst''.
	Over Op = iota
	// Src specifies ``src in mask''.
	Src
)

// Draw implements the [Drawer] interface by calling the Draw function with this
// [Op].
func (op Op) Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point) {

// ErrorHandling defines how [FlagSet.Parse] behaves if the parse fails.
type ErrorHandling int

// These constants cause [FlagSet.Parse] to behave as described if the parse fails.
const (
	ContinueOnError ErrorHandling = iota // Return a descriptive error.
	ExitOnError                          // Call os.Exit(2) or for -h/-help Exit(0).
	PanicOnError                         // Call panic with a descriptive error.
)

// are pruned out of the module subgraph rooted at a given module.
// (See https://golang.org/ref/mod#graph-pruning.)
type modPruning uint8

const (
	pruned    modPruning = iota // transitive dependencies of modules at go 1.17 and higher are pruned out
	unpruned                    // no transitive dependencies are pruned out
	workspace                   // pruned to the union of modules in the workspace
)

		return s.src[s.rdOffset]
	}
	return 0
}

// A mode value is a set of flags (or 0).
// They control scanner behavior.
type Mode uint

const (
	ScanComments    Mode = 1 << iota // return comments as COMMENT tokens
	dontInsertSemis                  // do not automatically insert semicolons - for testing only
)

// Init prepares the scanner s to tokenize the text src by setting the

	"time"
	"unicode/utf8"
)

type InvalidReason int

const (
	// NotAuthorizedToSign results when a certificate is signed by another
	// which isn't marked as a CA certificate.
	NotAuthorizedToSign InvalidReason = iota
	// Expired results when a certificate has expired, based on the time
	// given in the VerifyOptions.
	Expired
	// CANotAuthorizedForThisName results when an intermediate or root