func processOptions() {
	env := os.Getenv("GODEBUG")
field:
	for env != "" {
		field := ""
		i := strings.IndexByte(env, ',')
		if i < 0 {
			field, env = env, ""
		} else {
			field, env = env[:i], env[i+1:]
		}
		if len(field) < 4 || field[:4] != "cpu." {
			continue
		}
		i = strings.IndexByte(field, '=')
		if i < 0 {
			print("GODEBUG sys/cpu: no value specified for \"", field, "\"\n")
			continue
		}

}

func (f *testJSONFilter) Write(b []byte) (int, error) {
	bn := len(b)

	// Process complete lines, and buffer any incomplete lines.
	for len(b) > 0 {
		nl := bytes.IndexByte(b, '\n')
		if nl < 0 {
			f.lineBuf.Write(b)
			break
		}
		var line []byte
		if f.lineBuf.Len() > 0 {
			// We have buffered data. Add the rest of the line from b and
			// process the complete line.

func ParseUnverifiedStandardClaims(token []byte, claims *StandardClaims, buf []byte) (*SigningMethodHMAC, error) {
	if bytes.Count(token, []byte(".")) != 2 {
		return nil, jwtgo.ErrSignatureInvalid
	}

	i := bytes.IndexByte(token, '.')
	j := bytes.LastIndexByte(token, '.')

	n, err := base64DecodeBytes(token[:i], buf)
	if err != nil {
		return nil, &jwtgo.ValidationError{Inner: err, Errors: jwtgo.ValidationErrorMalformed}
	}

				log.Fatalf("%s requires a filename", arg)
			}
			vetTool = args[i+1]
			return
		} else if strings.HasPrefix(arg, "-vettool=") ||
			strings.HasPrefix(arg, "--vettool=") {
			vetTool = arg[strings.IndexByte(arg, '=')+1:]
			return
		}
	}
}

// vetFlags processes the command line, splitting it at the first non-flag
// into the list of flags and list of packages.

func FromSlash(path string) string {
	if Separator == '/' {
		return path
	}
	return replaceStringByte(path, '/', Separator)
}

func replaceStringByte(s string, old, new byte) string {
	if stringslite.IndexByte(s, old) == -1 {
		return s
	}
	n := []byte(s)
	for i := range n {
		if n[i] == old {
			n[i] = new
		}
	}
	return string(n)
}

// Split is filepath.Split.

//go:build freebsd || netbsd

package unix

import (
	"strings"
	"unsafe"
)

// Derive extattr namespace and attribute name

func xattrnamespace(fullattr string) (ns int, attr string, err error) {
	s := strings.IndexByte(fullattr, '.')
	if s == -1 {
		return -1, "", ENOATTR
	}

	namespace := fullattr[0:s]
	attr = fullattr[s+1:]

	switch namespace {
	case "user":
		return EXTATTR_NAMESPACE_USER, attr, nil

		// zero or more characters not including ", and a final ".”
		if j := strings.IndexByte(s[i+1:], s[i]); j >= 0 {
			end := i + 1 + j + 1
			return s[i:end], end, true
		}
	}

	// “An unquoted attribute value is a nonempty string of characters
	// not including spaces, tabs, line endings, ", ', =, <, >, or `.”
	j := i
	for j < len(s) && strings.IndexByte(" \t\n\"'=<>`", s[j]) < 0 {
		j++
	}
	if j > i {

	input := bufio.NewScanner(bytes.NewReader(valueBuffer.Bytes()))
	for input.Scan() {
		line := strings.TrimSpace(input.Text())
		if line == "" {
			continue
		}
		// Find first separator.
		idx := strings.IndexByte(line, trailerKVSeparator[0])
		if idx <= 0 || idx >= len(line) {
			if cr.debug {
				fmt.Printf("Could not find separator, got %q\n", line)
			}
			return errMalformedEncoding
		}

			if i >= 0 {
				field = field[:i]
			} else {
				field = field[:len(field)-lengthNL(field)]
			}
			// Check to make sure a quote does not appear in field.
			if !r.LazyQuotes {
				if j := bytes.IndexByte(field, '"'); j >= 0 {
					col := pos.col + j
					err = &ParseError{StartLine: recLine, Line: r.numLine, Column: col, Err: ErrBareQuote}
					break parseField
				}
			}

			c.testName = c.report[indent-1].Test
		}
		c.output.write(origLine)
		return
	}

	// Parse out action and test name.
	i := 0
	if actionColon {
		i = bytes.IndexByte(line, ':') + 1
	}
	if i == 0 {
		i = len(updates[0])
	}
	action := strings.ToLower(strings.TrimSuffix(strings.TrimSpace(string(line[4:i])), ":"))
	name := strings.TrimSpace(string(line[i:]))