How to use failf method of kconfig Package

Best Syzkaller code snippet using kconfig.failf

kconfig.go

Source:kconfig.go

...299			kp.ConsumeLine()300			break301		}302	default:303		kp.failf("unknown line")304	}305}306func (kp *kconfigParser) includeSource(file string) {307	kp.newCurrent(nil)308	file = kp.expandString(file)309	file = filepath.Join(kp.baseDir, file)310	data, err := ioutil.ReadFile(file)311	if err != nil {312		kp.failf("%v", err)313		return314	}315	kp.includes = append(kp.includes, kp.parser)316	kp.parser = newParser(data, file)317	kp.parseFile()318	err = kp.err319	kp.parser = kp.includes[len(kp.includes)-1]320	kp.includes = kp.includes[:len(kp.includes)-1]321	if kp.err == nil {322		kp.err = err323	}324}325func (kp *kconfigParser) pushCurrent(m *Menu) {326	kp.endCurrent()327	kp.cur = m328	kp.stack = append(kp.stack, m)329}330func (kp *kconfigParser) popCurrent() {331	kp.endCurrent()332	if len(kp.stack) < 2 {333		kp.failf("unbalanced endmenu")334		return335	}336	last := kp.stack[len(kp.stack)-1]337	kp.stack = kp.stack[:len(kp.stack)-1]338	top := kp.stack[len(kp.stack)-1]339	last.Parent = top340	top.Elems = append(top.Elems, last)341}342func (kp *kconfigParser) newCurrent(m *Menu) {343	kp.endCurrent()344	kp.cur = m345}346func (kp *kconfigParser) current() *Menu {347	if kp.cur == nil {348		kp.failf("config property outside of config")349		return &Menu{}350	}351	return kp.cur352}353func (kp *kconfigParser) endCurrent() {354	if kp.cur == nil {355		return356	}357	if len(kp.stack) == 0 {358		kp.failf("unbalanced endmenu")359		return360	}361	top := kp.stack[len(kp.stack)-1]362	if top != kp.cur {363		kp.cur.Parent = top364		top.Elems = append(top.Elems, kp.cur)365	}366	kp.cur = nil367}368func (kp *kconfigParser) tryParsePrompt() {369	if str, ok := kp.TryQuotedString(); ok {370		prompt := prompt{371			text: str,372		}...

parser.go

Source:parser.go

...24// nextLine resets the parser to the next line.25// Automatically concatenates lines split with \ at the end.26func (p *parser) nextLine() bool {27	if !p.eol() {28		p.failf("tailing data at the end of line")29		return false30	}31	if p.err != nil || len(p.data) == 0 {32		return false33	}34	p.col = 035	p.line++36	p.current = p.readNextLine()37	for p.current != "" && p.current[len(p.current)-1] == '\\' && len(p.data) != 0 {38		p.current = p.current[:len(p.current)-1] + p.readNextLine()39		p.line++40	}41	p.skipSpaces()42	return true43}44func (p *parser) readNextLine() string {45	line := ""46	nextLine := bytes.IndexByte(p.data, '\n')47	if nextLine != -1 {48		line = string(p.data[:nextLine])49		p.data = p.data[nextLine+1:]50	} else {51		line = string(p.data)52		p.data = nil53	}54	return line55}56func (p *parser) skipSpaces() {57	for p.col < len(p.current) && (p.current[p.col] == ' ' || p.current[p.col] == '\t') {58		p.col++59	}60}61func (p *parser) identLevel() int {62	level := 063	for i := 0; i < p.col; i++ {64		level++65		if p.current[i] == '\t' {66			level = (level + 7) & ^767		}68	}69	return level70}71func (p *parser) failf(msg string, args ...interface{}) {72	if p.err == nil {73		p.err = fmt.Errorf("%v:%v:%v: %v\n%v", p.file, p.line, p.col, fmt.Sprintf(msg, args...), p.current)74	}75}76func (p *parser) eol() bool {77	return p.col == len(p.current)78}79func (p *parser) char() byte {80	if p.err != nil {81		return 082	}83	if p.eol() {84		p.failf("unexpected end of line")85		return 086	}87	v := p.current[p.col]88	p.col++89	return v90}91func (p *parser) peek() byte {92	if p.err != nil || p.eol() {93		return 094	}95	return p.current[p.col]96}97func (p *parser) ConsumeLine() string {98	res := p.current[p.col:]99	p.col = len(p.current)100	return res101}102func (p *parser) TryConsume(what string) bool {103	if !strings.HasPrefix(p.current[p.col:], what) {104		return false105	}106	p.col += len(what)107	p.skipSpaces()108	return true109}110func (p *parser) MustConsume(what string) {111	if !p.TryConsume(what) {112		p.failf("expected %q", what)113	}114}115func (p *parser) QuotedString() string {116	var str []byte117	quote := p.char()118	if quote != '"' && quote != '\'' {119		p.failf("expect quoted string")120	}121	for ch := p.char(); ch != quote; ch = p.char() {122		if ch == 0 {123			p.failf("unterminated quoted string")124			break125		}126		if ch == '\\' {127			ch = p.char()128			switch ch {129			case '\'', '"', '\\', 'n':130				str = append(str, ch)131			default:132				p.failf("bad quoted character")133			}134			continue135		}136		str = append(str, ch)137		if ch == '$' && p.peek() == '(' {138			str = append(str, p.Shell()...)139		}140	}141	p.skipSpaces()142	return string(str)143}144func (p *parser) TryQuotedString() (string, bool) {145	if ch := p.peek(); ch == '"' || ch == '\'' {146		return p.QuotedString(), true147	}148	return "", false149}150func (p *parser) Ident() string {151	var str []byte152	for !p.eol() {153		ch := p.peek()154		if ch >= 'a' && ch <= 'z' ||155			ch >= 'A' && ch <= 'Z' ||156			ch >= '0' && ch <= '9' ||157			ch == '_' || ch == '-' {158			str = append(str, ch)159			p.col++160			continue161		}162		break163	}164	if len(str) == 0 {165		p.failf("expected an identifier")166	}167	p.skipSpaces()168	return string(str)169}170func (p *parser) Shell() string {171	start := p.col172	p.MustConsume("(")173	for !p.eol() && p.peek() != ')' {174		if p.peek() == '"' {175			p.QuotedString()176		} else if p.peek() == '(' {177			p.Shell()178		} else {179			p.col++180		}181	}182	if ch := p.char(); ch != ')' {183		p.failf("shell expression is not terminated")184	}185	res := p.current[start:p.col]186	p.skipSpaces()187	return res188}...

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.