How to use SkipWs method of prog Package

Best Syzkaller code snippet using prog.SkipWs

encoding.go

Source:encoding.go

...221				p.Parse(',')222			}223		}224		p.Parse(')')225		p.SkipWs()226		if !p.EOF() {227			if p.Char() != '#' {228				return nil, fmt.Errorf("tailing data (line #%v)", p.l)229			}230			if c.Comment != "" {231				prog.Comments = append(prog.Comments, c.Comment)232			}233			c.Comment = strings.TrimSpace(p.s[p.i+1:])234		}235		for i := len(c.Args); i < len(meta.Args); i++ {236			c.Args = append(c.Args, meta.Args[i].makeDefaultArg())237		}238		if len(c.Args) != len(meta.Args) {239			return nil, fmt.Errorf("wrong call arg count: %v, want %v", len(c.Args), len(meta.Args))240		}241		if r != "" && c.Ret != nil {242			vars[r] = c.Ret243		}244		comment = ""245	}246	if comment != "" {247		prog.Comments = append(prog.Comments, comment)248	}249	if err := p.Err(); err != nil {250		return nil, err251	}252	// This validation is done even in non-debug mode because deserialization253	// procedure does not catch all bugs (e.g. mismatched types).254	// And we can receive bad programs from corpus and hub.255	if err := prog.validate(); err != nil {256		return nil, err257	}258	for _, c := range prog.Calls {259		target.SanitizeCall(c)260	}261	return262}263func (target *Target) parseArg(typ Type, p *parser, vars map[string]*ResultArg) (Arg, error) {264	r := ""265	if p.Char() == '<' {266		p.Parse('<')267		r = p.Ident()268		p.Parse('=')269		p.Parse('>')270	}271	arg, err := target.parseArgImpl(typ, p, vars)272	if err != nil {273		return nil, err274	}275	if arg == nil {276		if typ != nil {277			arg = typ.makeDefaultArg()278		} else if r != "" {279			return nil, fmt.Errorf("named nil argument")280		}281	}282	if r != "" {283		if res, ok := arg.(*ResultArg); ok {284			vars[r] = res285		}286	}287	return arg, nil288}289func (target *Target) parseArgImpl(typ Type, p *parser, vars map[string]*ResultArg) (Arg, error) {290	switch p.Char() {291	case '0':292		return target.parseArgInt(typ, p)293	case 'r':294		return target.parseArgRes(typ, p, vars)295	case '&':296		return target.parseArgAddr(typ, p, vars)297	case '"', '\'':298		return target.parseArgString(typ, p)299	case '{':300		return target.parseArgStruct(typ, p, vars)301	case '[':302		return target.parseArgArray(typ, p, vars)303	case '@':304		return target.parseArgUnion(typ, p, vars)305	case 'n':306		p.Parse('n')307		p.Parse('i')308		p.Parse('l')309		return nil, nil310	default:311		return nil, fmt.Errorf("failed to parse argument at %v (line #%v/%v: %v)",312			int(p.Char()), p.l, p.i, p.s)313	}314}315func (target *Target) parseArgInt(typ Type, p *parser) (Arg, error) {316	val := p.Ident()317	v, err := strconv.ParseUint(val, 0, 64)318	if err != nil {319		return nil, fmt.Errorf("wrong arg value '%v': %v", val, err)320	}321	switch typ.(type) {322	case *ConstType, *IntType, *FlagsType, *ProcType, *LenType, *CsumType:323		return MakeConstArg(typ, v), nil324	case *ResourceType:325		return MakeResultArg(typ, nil, v), nil326	case *PtrType, *VmaType:327		if typ.Optional() {328			return MakeNullPointerArg(typ), nil329		}330		return typ.makeDefaultArg(), nil331	default:332		eatExcessive(p, true)333		return typ.makeDefaultArg(), nil334	}335}336func (target *Target) parseArgRes(typ Type, p *parser, vars map[string]*ResultArg) (Arg, error) {337	id := p.Ident()338	var div, add uint64339	if p.Char() == '/' {340		p.Parse('/')341		op := p.Ident()342		v, err := strconv.ParseUint(op, 0, 64)343		if err != nil {344			return nil, fmt.Errorf("wrong result div op: '%v'", op)345		}346		div = v347	}348	if p.Char() == '+' {349		p.Parse('+')350		op := p.Ident()351		v, err := strconv.ParseUint(op, 0, 64)352		if err != nil {353			return nil, fmt.Errorf("wrong result add op: '%v'", op)354		}355		add = v356	}357	v := vars[id]358	if v == nil {359		return typ.makeDefaultArg(), nil360	}361	arg := MakeResultArg(typ, v, 0)362	arg.OpDiv = div363	arg.OpAdd = add364	return arg, nil365}366func (target *Target) parseArgAddr(typ Type, p *parser, vars map[string]*ResultArg) (Arg, error) {367	var typ1 Type368	switch t1 := typ.(type) {369	case *PtrType:370		typ1 = t1.Type371	case *VmaType:372	default:373		eatExcessive(p, true)374		return typ.makeDefaultArg(), nil375	}376	p.Parse('&')377	addr, vmaSize, err := target.parseAddr(p)378	if err != nil {379		return nil, err380	}381	var inner Arg382	if p.Char() == '=' {383		p.Parse('=')384		if p.Char() == 'A' {385			p.Parse('A')386			p.Parse('N')387			p.Parse('Y')388			p.Parse('=')389			typ = target.makeAnyPtrType(typ.Size(), typ.FieldName())390			typ1 = target.any.array391		}392		inner, err = target.parseArg(typ1, p, vars)393		if err != nil {394			return nil, err395		}396	}397	if typ1 == nil {398		return MakeVmaPointerArg(typ, addr, vmaSize), nil399	}400	if inner == nil {401		inner = typ1.makeDefaultArg()402	}403	return MakePointerArg(typ, addr, inner), nil404}405func (target *Target) parseArgString(typ Type, p *parser) (Arg, error) {406	if _, ok := typ.(*BufferType); !ok {407		eatExcessive(p, true)408		return typ.makeDefaultArg(), nil409	}410	data, err := deserializeData(p)411	if err != nil {412		return nil, err413	}414	size := ^uint64(0)415	if p.Char() == '/' {416		p.Parse('/')417		sizeStr := p.Ident()418		size, err = strconv.ParseUint(sizeStr, 0, 64)419		if err != nil {420			return nil, fmt.Errorf("failed to parse buffer size: %q", sizeStr)421		}422	}423	if !typ.Varlen() {424		size = typ.Size()425	} else if size == ^uint64(0) {426		size = uint64(len(data))427	}428	if typ.Dir() == DirOut {429		return MakeOutDataArg(typ, size), nil430	}431	if diff := int(size) - len(data); diff > 0 {432		data = append(data, make([]byte, diff)...)433	}434	data = data[:size]435	return MakeDataArg(typ, data), nil436}437func (target *Target) parseArgStruct(typ Type, p *parser, vars map[string]*ResultArg) (Arg, error) {438	p.Parse('{')439	t1, ok := typ.(*StructType)440	if !ok {441		eatExcessive(p, false)442		p.Parse('}')443		return typ.makeDefaultArg(), nil444	}445	var inner []Arg446	for i := 0; p.Char() != '}'; i++ {447		if i >= len(t1.Fields) {448			eatExcessive(p, false)449			break450		}451		fld := t1.Fields[i]452		if IsPad(fld) {453			inner = append(inner, MakeConstArg(fld, 0))454		} else {455			arg, err := target.parseArg(fld, p, vars)456			if err != nil {457				return nil, err458			}459			inner = append(inner, arg)460			if p.Char() != '}' {461				p.Parse(',')462			}463		}464	}465	p.Parse('}')466	for len(inner) < len(t1.Fields) {467		inner = append(inner, t1.Fields[len(inner)].makeDefaultArg())468	}469	return MakeGroupArg(typ, inner), nil470}471func (target *Target) parseArgArray(typ Type, p *parser, vars map[string]*ResultArg) (Arg, error) {472	p.Parse('[')473	t1, ok := typ.(*ArrayType)474	if !ok {475		eatExcessive(p, false)476		p.Parse(']')477		return typ.makeDefaultArg(), nil478	}479	var inner []Arg480	for i := 0; p.Char() != ']'; i++ {481		arg, err := target.parseArg(t1.Type, p, vars)482		if err != nil {483			return nil, err484		}485		inner = append(inner, arg)486		if p.Char() != ']' {487			p.Parse(',')488		}489	}490	p.Parse(']')491	if t1.Kind == ArrayRangeLen && t1.RangeBegin == t1.RangeEnd {492		for uint64(len(inner)) < t1.RangeBegin {493			inner = append(inner, t1.Type.makeDefaultArg())494		}495		inner = inner[:t1.RangeBegin]496	}497	return MakeGroupArg(typ, inner), nil498}499func (target *Target) parseArgUnion(typ Type, p *parser, vars map[string]*ResultArg) (Arg, error) {500	t1, ok := typ.(*UnionType)501	if !ok {502		eatExcessive(p, true)503		return typ.makeDefaultArg(), nil504	}505	p.Parse('@')506	name := p.Ident()507	var optType Type508	for _, t2 := range t1.Fields {509		if name == t2.FieldName() {510			optType = t2511			break512		}513	}514	if optType == nil {515		eatExcessive(p, true)516		return typ.makeDefaultArg(), nil517	}518	var opt Arg519	if p.Char() == '=' {520		p.Parse('=')521		var err error522		opt, err = target.parseArg(optType, p, vars)523		if err != nil {524			return nil, err525		}526	} else {527		opt = optType.makeDefaultArg()528	}529	return MakeUnionArg(typ, opt), nil530}531// Eats excessive call arguments and struct fields to recover after description changes.532func eatExcessive(p *parser, stopAtComma bool) {533	paren, brack, brace := 0, 0, 0534	for !p.EOF() && p.e == nil {535		ch := p.Char()536		switch ch {537		case '(':538			paren++539		case ')':540			if paren == 0 {541				return542			}543			paren--544		case '[':545			brack++546		case ']':547			if brack == 0 {548				return549			}550			brack--551		case '{':552			brace++553		case '}':554			if brace == 0 {555				return556			}557			brace--558		case ',':559			if stopAtComma && paren == 0 && brack == 0 && brace == 0 {560				return561			}562		case '\'', '"':563			p.Parse(ch)564			for !p.EOF() && p.Char() != ch {565				p.Parse(p.Char())566			}567			if p.EOF() {568				return569			}570		}571		p.Parse(ch)572	}573}574const (575	encodingAddrBase = 0x7f0000000000576	maxLineLen       = 1 << 20577)578func (target *Target) serializeAddr(arg *PointerArg) string {579	ssize := ""580	if arg.VmaSize != 0 {581		ssize = fmt.Sprintf("/0x%x", arg.VmaSize)582	}583	return fmt.Sprintf("(0x%x%v)", encodingAddrBase+arg.Address, ssize)584}585func (target *Target) parseAddr(p *parser) (uint64, uint64, error) {586	p.Parse('(')587	pstr := p.Ident()588	addr, err := strconv.ParseUint(pstr, 0, 64)589	if err != nil {590		return 0, 0, fmt.Errorf("failed to parse addr: %q", pstr)591	}592	if addr < encodingAddrBase {593		return 0, 0, fmt.Errorf("address without base offset: %q", pstr)594	}595	addr -= encodingAddrBase596	// This is not used anymore, but left here to parse old programs.597	if p.Char() == '+' || p.Char() == '-' {598		minus := false599		if p.Char() == '-' {600			minus = true601			p.Parse('-')602		} else {603			p.Parse('+')604		}605		ostr := p.Ident()606		off, err := strconv.ParseUint(ostr, 0, 64)607		if err != nil {608			return 0, 0, fmt.Errorf("failed to parse addr offset: %q", ostr)609		}610		if minus {611			off = -off612		}613		addr += off614	}615	maxMem := target.NumPages * target.PageSize616	var vmaSize uint64617	if p.Char() == '/' {618		p.Parse('/')619		pstr := p.Ident()620		size, err := strconv.ParseUint(pstr, 0, 64)621		if err != nil {622			return 0, 0, fmt.Errorf("failed to parse addr size: %q", pstr)623		}624		addr = addr & ^(target.PageSize - 1)625		vmaSize = (size + target.PageSize - 1) & ^(target.PageSize - 1)626		if vmaSize == 0 {627			vmaSize = target.PageSize628		}629		if vmaSize > maxMem {630			vmaSize = maxMem631		}632		if addr > maxMem-vmaSize {633			addr = maxMem - vmaSize634		}635	}636	p.Parse(')')637	return addr, vmaSize, nil638}639func serializeData(buf *bytes.Buffer, data []byte) {640	readable := true641	for _, v := range data {642		if v >= 0x20 && v < 0x7f {643			continue644		}645		switch v {646		case 0, '\a', '\b', '\f', '\n', '\r', '\t', '\v':647			continue648		}649		readable = false650		break651	}652	if !readable || len(data) == 0 {653		fmt.Fprintf(buf, "\"%v\"", hex.EncodeToString(data))654		return655	}656	buf.WriteByte('\'')657	for _, v := range data {658		switch v {659		case 0:660			buf.Write([]byte{'\\', 'x', '0', '0'})661		case '\a':662			buf.Write([]byte{'\\', 'a'})663		case '\b':664			buf.Write([]byte{'\\', 'b'})665		case '\f':666			buf.Write([]byte{'\\', 'f'})667		case '\n':668			buf.Write([]byte{'\\', 'n'})669		case '\r':670			buf.Write([]byte{'\\', 'r'})671		case '\t':672			buf.Write([]byte{'\\', 't'})673		case '\v':674			buf.Write([]byte{'\\', 'v'})675		case '\'':676			buf.Write([]byte{'\\', '\''})677		case '\\':678			buf.Write([]byte{'\\', '\\'})679		default:680			buf.WriteByte(v)681		}682	}683	buf.WriteByte('\'')684}685func deserializeData(p *parser) ([]byte, error) {686	var data []byte687	if p.Char() == '"' {688		p.Parse('"')689		val := ""690		if p.Char() != '"' {691			val = p.Ident()692		}693		p.Parse('"')694		var err error695		data, err = hex.DecodeString(val)696		if err != nil {697			return nil, fmt.Errorf("data arg has bad value %q", val)698		}699	} else {700		if p.consume() != '\'' {701			return nil, fmt.Errorf("data arg does not start with \" nor with '")702		}703		for p.Char() != '\'' && p.Char() != 0 {704			v := p.consume()705			if v != '\\' {706				data = append(data, v)707				continue708			}709			v = p.consume()710			switch v {711			case 'x':712				hi := p.consume()713				lo := p.consume()714				if lo != '0' || hi != '0' {715					return nil, fmt.Errorf(716						"invalid \\x%c%c escape sequence in data arg", hi, lo)717				}718				data = append(data, 0)719			case 'a':720				data = append(data, '\a')721			case 'b':722				data = append(data, '\b')723			case 'f':724				data = append(data, '\f')725			case 'n':726				data = append(data, '\n')727			case 'r':728				data = append(data, '\r')729			case 't':730				data = append(data, '\t')731			case 'v':732				data = append(data, '\v')733			case '\'':734				data = append(data, '\'')735			case '\\':736				data = append(data, '\\')737			default:738				return nil, fmt.Errorf("invalid \\%c escape sequence in data arg", v)739			}740		}741		p.Parse('\'')742	}743	return data, nil744}745type parser struct {746	r *bufio.Scanner747	s string748	i int749	l int750	e error751}752func newParser(data []byte) *parser {753	p := &parser{r: bufio.NewScanner(bytes.NewReader(data))}754	p.r.Buffer(nil, maxLineLen)755	return p756}757func (p *parser) Scan() bool {758	if p.e != nil {759		return false760	}761	if !p.r.Scan() {762		p.e = p.r.Err()763		return false764	}765	p.s = p.r.Text()766	p.i = 0767	p.l++768	return true769}770func (p *parser) Err() error {771	return p.e772}773func (p *parser) Str() string {774	return p.s775}776func (p *parser) EOF() bool {777	return p.i == len(p.s)778}779func (p *parser) Char() byte {780	if p.e != nil {781		return 0782	}783	if p.EOF() {784		p.failf("unexpected eof")785		return 0786	}787	return p.s[p.i]788}789func (p *parser) Parse(ch byte) {790	if p.e != nil {791		return792	}793	if p.EOF() {794		p.failf("want %s, got EOF", string(ch))795		return796	}797	if p.s[p.i] != ch {798		p.failf("want '%v', got '%v'", string(ch), string(p.s[p.i]))799		return800	}801	p.i++802	p.SkipWs()803}804func (p *parser) consume() byte {805	if p.e != nil {806		return 0807	}808	if p.EOF() {809		p.failf("unexpected eof")810		return 0811	}812	v := p.s[p.i]813	p.i++814	return v815}816func (p *parser) SkipWs() {817	for p.i < len(p.s) && (p.s[p.i] == ' ' || p.s[p.i] == '\t') {818		p.i++819	}820}821func (p *parser) Ident() string {822	i := p.i823	for p.i < len(p.s) &&824		(p.s[p.i] >= 'a' && p.s[p.i] <= 'z' ||825			p.s[p.i] >= 'A' && p.s[p.i] <= 'Z' ||826			p.s[p.i] >= '0' && p.s[p.i] <= '9' ||827			p.s[p.i] == '_' || p.s[p.i] == '$') {828		p.i++829	}830	if i == p.i {831		p.failf("failed to parse identifier at pos %v", i)832		return ""833	}834	s := p.s[i:p.i]835	p.SkipWs()836	return s837}838func (p *parser) failf(msg string, args ...interface{}) {839	p.e = fmt.Errorf("%v\nline #%v: %v", fmt.Sprintf(msg, args...), p.l, p.s)840}841// CallSet returns a set of all calls in the program.842// It does very conservative parsing and is intended to parse paste/future serialization formats.843func CallSet(data []byte) (map[string]struct{}, error) {844	calls := make(map[string]struct{})845	s := bufio.NewScanner(bytes.NewReader(data))846	s.Buffer(nil, maxLineLen)847	for s.Scan() {848		ln := s.Bytes()849		if len(ln) == 0 || ln[0] == '#' {...

SkipWs

Using AI Code Generation

1import (2type Prog struct {3}4func (p *Prog) SkipWs() {5	for p.Pos < len(p.Source) && p.Source[p.Pos] == ' ' {6	}7}8func main() {9	src, _ := ioutil.ReadFile("2.go")10	p := Prog{Source: string(src)}11	p.SkipWs()12	fmt.Println(p.Source[p.Pos])13}14import (15type Prog struct {16}17func (p *Prog) SkipWs() {18	for p.Pos < len(p.Source) && p.Source[p.Pos] == ' ' {19	}20}21func main() {22	src, _ := ioutil.ReadFile("3.go")23	p := Prog{Source: string(src)}24	p.SkipWs()25	fmt.Println(p.Source[p.Pos])26}27import (28type Prog struct {29}30func (p *Prog) SkipWs() {31	for p.Pos < len(p.Source) && p.Source[p.Pos] == ' ' {32	}33}34func main() {35	src, _ := ioutil.ReadFile("4.go")36	p := Prog{Source: string(src)}37	p.SkipWs()38	fmt.Println(p.Source[p.Pos])39}40import (41type Prog struct {42}43func (p *Prog) SkipWs() {44	for p.Pos < len(p.Source) && p.Source[p.Pos] == ' ' {45	}46}47func main() {48	src, _ := ioutil.ReadFile("5.go")49	p := Prog{Source: string(src)}50	p.SkipWs()51	fmt.Println(p.Source[p.Pos])52}53import (

SkipWs

Using AI Code Generation

1import (2type Prog struct {3}4func (p *Prog) SkipWs() {5	for p.pos < len(p.src) && strings.ContainsRune(" \t6", rune(p.src[p.pos])) {7	}8}9func main() {10	p := Prog{src: "  \t11"}12	p.SkipWs()13	fmt.Println(p.pos)14}

SkipWs

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println("Hello, playground")4    prog := new(Prog)5    prog.SkipWs()6}7import "fmt"8func main() {9    fmt.Println("Hello, playground")10    prog := new(Prog)11    prog.SkipWs()12}13import "fmt"14func main() {15    fmt.Println("Hello, playground")16    prog := new(Prog)17    prog.SkipWs()18}19import "fmt"20func main() {21    fmt.Println("Hello, playground")22    prog := new(Prog)23    prog.SkipWs()24}25import "fmt"26func main() {27    fmt.Println("Hello, playground")28    prog := new(Prog)29    prog.SkipWs()30}31import "fmt"32func main() {33    fmt.Println("Hello, playground")34    prog := new(Prog)35    prog.SkipWs()36}37import "fmt"38func main() {39    fmt.Println("Hello, playground")40    prog := new(Prog)41    prog.SkipWs()42}43import "fmt"44func main() {45    fmt.Println("Hello, playground")46    prog := new(Prog)47    prog.SkipWs()48}49import "fmt"50func main() {51    fmt.Println("Hello, playground")52    prog := new(Prog)53    prog.SkipWs()54}55import "fmt"56func main() {57    fmt.Println("Hello, playground")58    prog := new(Prog)59    prog.SkipWs()60}

SkipWs

Using AI Code Generation

1import (2func main() {3	scanner := bufio.NewScanner(os.Stdin)4	for scanner.Scan() {5		line := scanner.Text()6		p := prog{line, 0}7		p.skipWs()8		fmt.Println(p.index)9	}10}11type prog struct {12}13func (p *prog) skipWs() {14	for p.index < len(p.text) && p.text[p.index] == ' ' {15	}16}

SkipWs

Using AI Code Generation

1import (2type prog struct {3}4func (p *prog) SkipWs() {5	for p.pos < len(p.text) && p.text[p.pos] == ' ' {6	}7}8func main() {9	scanner := bufio.NewScanner(os.Stdin)10	fmt.Print("Enter the string: ")11	scanner.Scan()12	text := scanner.Text()13	p := prog{text, 0}14	p.SkipWs()15	fmt.Println("The string is: ", p.text)16}

SkipWs

Using AI Code Generation

1import (2type Prog struct {3}4func (p *Prog) SkipWs() {5	for {6		r, _, err := p.r.ReadRune()7		if err != nil {8			panic(err)9		}10		if !unicode.IsSpace(r) {11			p.r.UnreadRune()12		}13	}14}15func main() {16	prog := &Prog{r: bufio.NewReader(os.Stdin)}17	prog.SkipWs()18	fmt.Println("Hello World!")19}

SkipWs

Using AI Code Generation

1import (2func main() {3    p := prog{input: strings.NewReader("  123")}4    p.SkipWs()5    fmt.Printf("p.pos = %d6}7import (8type prog struct {9}10func (p *prog) SkipWs() {11    for p.pos < len(p.input) && p.input[p.pos] == ' ' {12    }13}14In the above example, we have two files: 1.go and 2.go. 1.go contains the prog class and 2.go contains the code to use the prog class. In 2.go, we are importing the prog class from 1.go. So, we need to compile both the files together. To compile both the files together, we can use the following command:15Go: How to import a package from a remote repository16Go: How to import a package from a local directory17Go: How to import a package from a remote repository using go get18Go: How to import a package from a local directory using go get19Go: How to import a package from a remote repository using go install20Go: How to import a package from a local directory using go install21Go: How to import a package from a remote repository using go build22Go: How to import a package from a local directory using go build23Go: How to import a package from a remote repository using go run24Go: How to import a package from a local directory using go run25Go: How to import a package from a remote repository using go test26Go: How to import a package from a local directory using go test27Go: How to import a package from a remote repository using go fmt28Go: How to import a package from a local

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