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How to use Varlen method of prog Package

Best Syzkaller code snippet using prog.Varlen

gen.go

Source:gen.go

...84		}85		padded[desc] = true86		for _, f := range desc.Fields {87			rec(f)88			if !f.Varlen() && f.Size() == sizeUnassigned {89				// An inner struct is not padded yet.90				// Leave this struct for next iteration.91				delete(padded, desc)92				return false93			}94		}95		if comp.used[key.Name] {96			structs = append(structs, &prog.KeyedStruct{97				Key:  key,98				Desc: desc,99			})100		}101		return true102	}103	rec = func(t0 prog.Type) {104		switch t := t0.(type) {105		case *prog.PtrType:106			rec(t.Type)107		case *prog.ArrayType:108			if padded[t] {109				return110			}111			rec(t.Type)112			if !t.Type.Varlen() && t.Type.Size() == sizeUnassigned {113				// An inner struct is not padded yet.114				// Leave this array for next iteration.115				return116			}117			padded[t] = true118			t.TypeSize = 0119			if t.Kind == prog.ArrayRangeLen && t.RangeBegin == t.RangeEnd && !t.Type.Varlen() {120				t.TypeSize = t.RangeBegin * t.Type.Size()121			}122		case *prog.StructType:123			if !checkStruct(t.Key, &t.StructDesc) {124				return125			}126			// Add paddings, calculate size, mark bitfields.127			varlen := false128			for _, f := range t.Fields {129				if f.Varlen() {130					varlen = true131				}132			}133			comp.markBitfields(t.Fields)134			packed, alignAttr := comp.parseStructAttrs(comp.structNodes[t.StructDesc])135			t.Fields = comp.addAlignment(t.Fields, varlen, packed, alignAttr)136			t.AlignAttr = alignAttr137			t.TypeSize = 0138			if !varlen {139				for _, f := range t.Fields {140					if !f.BitfieldMiddle() {141						t.TypeSize += f.Size()142					}143				}144			}145		case *prog.UnionType:146			if !checkStruct(t.Key, &t.StructDesc) {147				return148			}149			t.TypeSize = 0150			varlen := comp.parseUnionAttrs(comp.structNodes[t.StructDesc])151			if !varlen {152				for _, fld := range t.Fields {153					if t.TypeSize < fld.Size() {154						t.TypeSize = fld.Size()155					}156				}157			}158		}159	}160	// We have to do this in the loop until we pad nothing new161	// due to recursive structs.162	for {163		start := len(padded)164		for _, c := range syscalls {165			for _, a := range c.Args {166				rec(a)167			}168			if c.Ret != nil {169				rec(c.Ret)170			}171		}172		if start == len(padded) {173			break174		}175	}176	// Detach StructDesc's from StructType's. prog will reattach them again.177	for descp := range detach {178		*descp = nil179	}180	sort.Slice(structs, func(i, j int) bool {181		si, sj := structs[i], structs[j]182		if si.Key.Name != sj.Key.Name {183			return si.Key.Name < sj.Key.Name184		}185		return si.Key.Dir < sj.Key.Dir186	})187	return structs188}189func (comp *compiler) genStructDesc(res *prog.StructDesc, n *ast.Struct, dir prog.Dir) {190	// Leave node for genStructDescs to calculate size/padding.191	comp.structNodes[res] = n192	*res = prog.StructDesc{193		TypeCommon: genCommon(n.Name.Name, "", sizeUnassigned, dir, false),194		Fields:     comp.genFieldArray(n.Fields, dir, false),195	}196}197func (comp *compiler) isStructVarlen(name string) bool {198	if varlen, ok := comp.structVarlen[name]; ok {199		return varlen200	}201	s := comp.structs[name]202	if s.IsUnion && comp.parseUnionAttrs(s) {203		comp.structVarlen[name] = true204		return true205	}206	comp.structVarlen[name] = false // to not hang on recursive types207	varlen := false208	for _, fld := range s.Fields {209		if comp.isVarlen(fld.Type) {210			varlen = true211			break212		}213	}214	comp.structVarlen[name] = varlen215	return varlen216}217func (comp *compiler) markBitfields(fields []prog.Type) {218	var bfOffset uint64219	for i, f := range fields {220		if f.BitfieldLength() == 0 {221			continue222		}223		off, middle := bfOffset, true224		bfOffset += f.BitfieldLength()225		if i == len(fields)-1 || // Last bitfield in a group, if last field of the struct...226			fields[i+1].BitfieldLength() == 0 || // or next field is not a bitfield...227			f.Size() != fields[i+1].Size() || // or next field is of different size...228			bfOffset+fields[i+1].BitfieldLength() > f.Size()*8 { // or next field does not fit into the current group.229			middle, bfOffset = false, 0230		}231		setBitfieldOffset(f, off, middle)232	}233}234func setBitfieldOffset(t0 prog.Type, offset uint64, middle bool) {235	switch t := t0.(type) {236	case *prog.IntType:237		t.BitfieldOff, t.BitfieldMdl = offset, middle238	case *prog.ConstType:239		t.BitfieldOff, t.BitfieldMdl = offset, middle240	case *prog.LenType:241		t.BitfieldOff, t.BitfieldMdl = offset, middle242	case *prog.FlagsType:243		t.BitfieldOff, t.BitfieldMdl = offset, middle244	case *prog.ProcType:245		t.BitfieldOff, t.BitfieldMdl = offset, middle246	default:247		panic(fmt.Sprintf("type %#v can't be a bitfield", t))248	}249}250func (comp *compiler) addAlignment(fields []prog.Type, varlen, packed bool, alignAttr uint64) []prog.Type {251	var newFields []prog.Type252	if packed {253		// If a struct is packed, statically sized and has explicitly set alignment,254		// add a padding at the end.255		newFields = fields256		if !varlen && alignAttr != 0 {257			size := uint64(0)258			for _, f := range fields {259				size += f.Size()260			}261			if tail := size % alignAttr; tail != 0 {262				newFields = append(newFields, genPad(alignAttr-tail))263			}264		}265		return newFields266	}267	var align, off uint64268	for i, f := range fields {269		if i > 0 && !fields[i-1].BitfieldMiddle() {270			a := comp.typeAlign(f)271			if align < a {272				align = a273			}274			// Append padding if the last field is not a bitfield or it's the last bitfield in a set.275			if off%a != 0 {276				pad := a - off%a277				off += pad278				newFields = append(newFields, genPad(pad))279			}280		}281		newFields = append(newFields, f)282		if !f.BitfieldMiddle() && (i != len(fields)-1 || !f.Varlen()) {283			// Increase offset if the current field is not a bitfield284			// or it's the last bitfield in a set, except when it's285			// the last field in a struct and has variable length.286			off += f.Size()287		}288	}289	if alignAttr != 0 {290		align = alignAttr291	}292	if align != 0 && off%align != 0 && !varlen {293		pad := align - off%align294		off += pad295		newFields = append(newFields, genPad(pad))296	}...

Varlen

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println("Enter 3 numbers")4    fmt.Scanln(&a, &b, &c)5    if a > b && a > c {6        fmt.Println("a is the largest number")7    } else if b > c {8        fmt.Println("b is the largest number")9    } else {10        fmt.Println("c is the largest number")11    }12}13import "fmt"14func main() {15    fmt.Println("Enter 3 numbers")16    fmt.Scanln(&a, &b, &c)17    if a > b && a > c {18        fmt.Println("a is the largest number")19    } else if b > c {20        fmt.Println("b is the largest number")21    } else {22        fmt.Println("c is the largest number")23    }24}25import "fmt"26func main() {27    fmt.Println("Enter 3 numbers")28    fmt.Scanln(&a, &b, &c)29    if a > b && a > c {30        fmt.Println("a is the largest number")31    } else if b > c {32        fmt.Println("b is the largest number")33    } else {34        fmt.Println("c is the largest number")35    }36}37import "fmt"38func main() {39    fmt.Println("Enter 3 numbers")40    fmt.Scanln(&a, &b, &c)41    if a > b && a > c {42        fmt.Println("a is the largest number")43    } else if b > c {44        fmt.Println("b is the largest number")45    } else {46        fmt.Println("c is the largest number")47    }48}49import "fmt"50func main() {51    fmt.Println("Enter 3 numbers")52    fmt.Scanln(&a, &b

Varlen

Using AI Code Generation

1import (2func main() {3	fmt.Println(prog)4	fmt.Println(prog[0])5	fmt.Println(prog[1])6	fmt.Println(prog[2])7	fmt.Println(prog[3])8}9Len(): returns the length of the string10Varlen(): returns the length of the string in bytes11Concat(): concatenates two strings12Contains(): returns true if the given string contains the given substring13HasPrefix(): returns true if the string has the given prefix14HasSuffix(): returns true if the string has the given suffix15Index(): returns the index of the first instance of the given substring16LastIndex(): returns the index of the last instance of the given substring17Replace(): replaces the first instance of the given substring with the given string18Split(): splits the string into a slice of strings based on the given separator19Join(): joins the elements of a slice of strings to create a single string20Trim(): trims the given characters from the beginning and end of the string21TrimLeft(): trims the given characters from the beginning of the string22TrimRight(): trims the given characters from the end of the string23ToUpper(): converts the string to uppercase24ToLower(): converts the string to lowercase25import (26func main() {27	fmt.Println(prog)28	fmt.Println(prog[0])29	fmt.Println(prog[1])30	fmt.Println(prog[2])31	fmt.Println(prog[3])32	fmt.Println(len(prog))33	fmt.Println(len([]byte(prog)))34	fmt.Println(strings.Contains(prog, "G"))35	fmt.Println(strings.Contains(prog, "o"))36	fmt.Println(strings.Contains(prog, "g"))37	fmt.Println(strings.Contains(prog, "O"))38	fmt.Println(strings.Contains(prog, "Go"))39	fmt.Println(strings.Contains(prog, "go"))40	fmt.Println(strings.Contains(prog, "GO"))41	fmt.Println(strings.Contains(prog, "GO "))42	fmt.Println(strings.Contains(prog, " GO"))43	fmt.Println(strings.HasPrefix(prog, "G"))44	fmt.Println(strings.HasPrefix

Varlen

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println(a)4    fmt.Printf("Type of a is %T5    fmt.Println(b)6    fmt.Printf("Type of b is %T7    fmt.Println(c)8    fmt.Printf("Type of c is %T9}10import "fmt"11func main() {12    fmt.Println(a, b, c, d)13    fmt.Printf("Type of a is %T14    fmt.Printf("Type of b is %T15    fmt.Printf("Type of c is %T16    fmt.Printf("Type of d is %T17}18import "fmt"19func main() {20    fmt.Println(a, b, c, d)21    fmt.Printf("Type of a is %T22    fmt.Printf("Type of b is %T23    fmt.Printf("Type of c is %T24    fmt.Printf("Type of d is %T25}26import "fmt"27func main() {

Varlen

Using AI Code Generation

1import (2func main() {3a.Varlen("Hello World!")4}5import "fmt"6type Prog struct {7}8func (p Prog) Varlen(s string) {9fmt.Println("Length of the string is", len(s))10}11import (12func main() {13a.Method(5, 6)14}15import "fmt"16type Prog struct {17}18func (p Prog) Method(a, b int) {19fmt.Println("Absolute value of", a, "is", a)20fmt.Println("Absolute value of", b, "is", b)21}22import (23func main() {24a.Interface(5, 6)25}26import "fmt"27type Prog struct {28}29func (p Prog) Interface(a, b int) {

Varlen

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println(s)4}5import "fmt"6func main() {7    fmt.Println(s)8}9import "fmt"10func main() {11    fmt.Println(s)12}13import "fmt"14func main() {15    fmt.Println(s)16}17import "fmt"18func main() {19    fmt.Println(s)20}21import "fmt"22func main() {23    fmt.Println(s)24}25import "fmt"26func main() {27    fmt.Println(s)28}29import "fmt"30func main() {31    fmt.Println(s)32}

Varlen

Using AI Code Generation

1import (2func main() {3    prog.Varlen()4    fmt.Println("main")5}6import (7func main() {8    prog.Varlen()9    fmt.Println("main")10}11import (12func main() {13    prog.Varlen()14    fmt.Println("main")15}16import (17func main() {18    prog.Varlen()19    fmt.Println("main")20}21import (22func main() {23    prog.Varlen()24    fmt.Println("main")25}26import (27func main() {28    prog.Varlen()29    fmt.Println("main")30}31import (32func main() {33    prog.Varlen()34    fmt.Println("main")35}36import (37func main() {38    prog.Varlen()39    fmt.Println("main")40}41import (

Varlen

Using AI Code Generation

1import (2func main() {3    fmt.Println(prog.Varlen(s))4}5import (6func main() {7    fmt.Println(prog.Varlen(s))8}9import (10func main() {11    fmt.Println(prog.Varlen(s))12}13import (14func main() {15    fmt.Println(prog.Varlen(s))16}17import (18func main() {19    fmt.Println(prog.Varlen(s))20}21import (22func main() {23    fmt.Println(prog.Varlen(s))24}25import (26func main() {

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