How to use pos method of prog Package

Best Syzkaller code snippet using prog.pos

backtrack.go

Source:backtrack.go

...3// license that can be found in the LICENSE file.4// backtrack is a regular expression search with submatch5// tracking for small regular expressions and texts. It allocates6// a bit vector with (length of input) * (length of prog) bits,7// to make sure it never explores the same (character position, instruction)8// state multiple times. This limits the search to run in time linear in9// the length of the test.10//11// backtrack is a fast replacement for the NFA code on small12// regexps when onepass cannot be used.13package regexp14import "regexp/syntax"15// A job is an entry on the backtracker's job stack. It holds16// the instruction pc and the position in the input.17type job struct {18	pc  uint3219	arg int20	pos int21}22const (23	visitedBits        = 3224	maxBacktrackProg   = 500        // len(prog.Inst) <= max25	maxBacktrackVector = 256 * 1024 // bit vector size <= max (bits)26)27// bitState holds state for the backtracker.28type bitState struct {29	prog *syntax.Prog30	end     int31	cap     []int32	input   input33	jobs    []job34	visited []uint3235}36var notBacktrack *bitState = nil37// maxBitStateLen returns the maximum length of a string to search with38// the backtracker using prog.39func maxBitStateLen(prog *syntax.Prog) int {40	if !shouldBacktrack(prog) {41		return 042	}43	return maxBacktrackVector / len(prog.Inst)44}45// newBitState returns a new bitState for the given prog,46// or notBacktrack if the size of the prog exceeds the maximum size that47// the backtracker will be run for.48func newBitState(prog *syntax.Prog) *bitState {49	if !shouldBacktrack(prog) {50		return notBacktrack51	}52	return &bitState{53		prog: prog,54	}55}56// shouldBacktrack reports whether the program is too57// long for the backtracker to run.58func shouldBacktrack(prog *syntax.Prog) bool {59	return len(prog.Inst) <= maxBacktrackProg60}61// reset resets the state of the backtracker.62// end is the end position in the input.63// ncap is the number of captures.64func (b *bitState) reset(end int, ncap int) {65	b.end = end66	if cap(b.jobs) == 0 {67		b.jobs = make([]job, 0, 256)68	} else {69		b.jobs = b.jobs[:0]70	}71	visitedSize := (len(b.prog.Inst)*(end+1) + visitedBits - 1) / visitedBits72	if cap(b.visited) < visitedSize {73		b.visited = make([]uint32, visitedSize, maxBacktrackVector/visitedBits)74	} else {75		b.visited = b.visited[:visitedSize]76		for i := range b.visited {77			b.visited[i] = 078		}79	}80	if cap(b.cap) < ncap {81		b.cap = make([]int, ncap)82	} else {83		b.cap = b.cap[:ncap]84	}85	for i := range b.cap {86		b.cap[i] = -187	}88}89// shouldVisit reports whether the combination of (pc, pos) has not90// been visited yet.91func (b *bitState) shouldVisit(pc uint32, pos int) bool {92	n := uint(int(pc)*(b.end+1) + pos)93	if b.visited[n/visitedBits]&(1<<(n&(visitedBits-1))) != 0 {94		return false95	}96	b.visited[n/visitedBits] |= 1 << (n & (visitedBits - 1))97	return true98}99// push pushes (pc, pos, arg) onto the job stack if it should be100// visited.101func (b *bitState) push(pc uint32, pos int, arg int) {102	if b.prog.Inst[pc].Op == syntax.InstFail {103		return104	}105	// Only check shouldVisit when arg == 0.106	// When arg > 0, we are continuing a previous visit.107	if arg == 0 && !b.shouldVisit(pc, pos) {108		return109	}110	b.jobs = append(b.jobs, job{pc: pc, arg: arg, pos: pos})111}112// tryBacktrack runs a backtracking search starting at pos.113func (m *machine) tryBacktrack(b *bitState, i input, pc uint32, pos int) bool {114	longest := m.re.longest115	m.matched = false116	b.push(pc, pos, 0)117	for len(b.jobs) > 0 {118		l := len(b.jobs) - 1119		// Pop job off the stack.120		pc := b.jobs[l].pc121		pos := b.jobs[l].pos122		arg := b.jobs[l].arg123		b.jobs = b.jobs[:l]124		// Optimization: rather than push and pop,125		// code that is going to Push and continue126		// the loop simply updates ip, p, and arg127		// and jumps to CheckAndLoop.  We have to128		// do the ShouldVisit check that Push129		// would have, but we avoid the stack130		// manipulation.131		goto Skip132	CheckAndLoop:133		if !b.shouldVisit(pc, pos) {134			continue135		}136	Skip:137		inst := b.prog.Inst[pc]138		switch inst.Op {139		default:140			panic("bad inst")141		case syntax.InstFail:142			panic("unexpected InstFail")143		case syntax.InstAlt:144			// Cannot just145			//   b.push(inst.Out, pos, 0)146			//   b.push(inst.Arg, pos, 0)147			// If during the processing of inst.Out, we encounter148			// inst.Arg via another path, we want to process it then.149			// Pushing it here will inhibit that. Instead, re-push150			// inst with arg==1 as a reminder to push inst.Arg out151			// later.152			switch arg {153			case 0:154				b.push(pc, pos, 1)155				pc = inst.Out156				goto CheckAndLoop157			case 1:158				// Finished inst.Out; try inst.Arg.159				arg = 0160				pc = inst.Arg161				goto CheckAndLoop162			}163			panic("bad arg in InstAlt")164		case syntax.InstAltMatch:165			// One opcode consumes runes; the other leads to match.166			switch b.prog.Inst[inst.Out].Op {167			case syntax.InstRune, syntax.InstRune1, syntax.InstRuneAny, syntax.InstRuneAnyNotNL:168				// inst.Arg is the match.169				b.push(inst.Arg, pos, 0)170				pc = inst.Arg171				pos = b.end172				goto CheckAndLoop173			}174			// inst.Out is the match - non-greedy175			b.push(inst.Out, b.end, 0)176			pc = inst.Out177			goto CheckAndLoop178		case syntax.InstRune:179			r, width := i.step(pos)180			if !inst.MatchRune(r) {181				continue182			}183			pos += width184			pc = inst.Out185			goto CheckAndLoop186		case syntax.InstRune1:187			r, width := i.step(pos)188			if r != inst.Rune[0] {189				continue190			}191			pos += width192			pc = inst.Out193			goto CheckAndLoop194		case syntax.InstRuneAnyNotNL:195			r, width := i.step(pos)196			if r == '\n' || r == endOfText {197				continue198			}199			pos += width200			pc = inst.Out201			goto CheckAndLoop202		case syntax.InstRuneAny:203			r, width := i.step(pos)204			if r == endOfText {205				continue206			}207			pos += width208			pc = inst.Out209			goto CheckAndLoop210		case syntax.InstCapture:211			switch arg {212			case 0:213				if 0 <= inst.Arg && inst.Arg < uint32(len(b.cap)) {214					// Capture pos to register, but save old value.215					b.push(pc, b.cap[inst.Arg], 1) // come back when we're done.216					b.cap[inst.Arg] = pos217				}218				pc = inst.Out219				goto CheckAndLoop220			case 1:221				// Finished inst.Out; restore the old value.222				b.cap[inst.Arg] = pos223				continue224			}225			panic("bad arg in InstCapture")226			continue227		case syntax.InstEmptyWidth:228			if syntax.EmptyOp(inst.Arg)&^i.context(pos) != 0 {229				continue230			}231			pc = inst.Out232			goto CheckAndLoop233		case syntax.InstNop:234			pc = inst.Out235			goto CheckAndLoop236		case syntax.InstMatch:237			// We found a match. If the caller doesn't care238			// where the match is, no point going further.239			if len(b.cap) == 0 {240				m.matched = true241				return m.matched242			}243			// Record best match so far.244			// Only need to check end point, because this entire245			// call is only considering one start position.246			if len(b.cap) > 1 {247				b.cap[1] = pos248			}249			if !m.matched || (longest && pos > 0 && pos > m.matchcap[1]) {250				copy(m.matchcap, b.cap)251			}252			m.matched = true253			// If going for first match, we're done.254			if !longest {255				return m.matched256			}257			// If we used the entire text, no longer match is possible.258			if pos == b.end {259				return m.matched260			}261			// Otherwise, continue on in hope of a longer match.262			continue263		}264		panic("unreachable")265	}266	return m.matched267}268// backtrack runs a backtracking search of prog on the input starting at pos.269func (m *machine) backtrack(i input, pos int, end int, ncap int) bool {270	if !i.canCheckPrefix() {271		panic("backtrack called for a RuneReader")272	}273	startCond := m.re.cond274	if startCond == ^syntax.EmptyOp(0) { // impossible275		return false276	}277	if startCond&syntax.EmptyBeginText != 0 && pos != 0 {278		// Anchored match, past beginning of text.279		return false280	}281	b := m.b282	b.reset(end, ncap)283	m.matchcap = m.matchcap[:ncap]284	for i := range m.matchcap {285		m.matchcap[i] = -1286	}287	// Anchored search must start at the beginning of the input288	if startCond&syntax.EmptyBeginText != 0 {289		if len(b.cap) > 0 {290			b.cap[0] = pos291		}292		return m.tryBacktrack(b, i, uint32(m.p.Start), pos)293	}294	// Unanchored search, starting from each possible text position.295	// Notice that we have to try the empty string at the end of296	// the text, so the loop condition is pos <= end, not pos < end.297	// This looks like it's quadratic in the size of the text,298	// but we are not clearing visited between calls to TrySearch,299	// so no work is duplicated and it ends up still being linear.300	width := -1301	for ; pos <= end && width != 0; pos += width {302		if len(m.re.prefix) > 0 {303			// Match requires literal prefix; fast search for it.304			advance := i.index(m.re, pos)305			if advance < 0 {306				return false307			}308			pos += advance309		}310		if len(b.cap) > 0 {311			b.cap[0] = pos312		}313		if m.tryBacktrack(b, i, uint32(m.p.Start), pos) {314			// Match must be leftmost; done.315			return true316		}317		_, width = i.step(pos)318	}319	return false320}...

pos

Using AI Code Generation

1import "fmt"2func main() {3    ret = max(a, b)4    fmt.Printf( "Max value is : %d\n", ret )5}6func max(num1, num2 int) int {7    if (num1 > num2) {8    } else {9    }10}

pos

Using AI Code Generation

1import (2func main() {3	p.Pos(1, 2)4	fmt.Println(p.X, p.Y)5}6type Prog struct {7}8func (p *Prog) Pos(x, y int) {9}10import (11func TestPos(t *testing.T) {12	p := Prog{}13	p.Pos(1, 2)14	if p.X != 1 || p.Y != 2 {15		t.Fatalf("Pos() failed")16	}17}

pos

Using AI Code Generation

1import "fmt"2func main() {3    p.pos(10, 20)4    fmt.Println(p.x, p.y)5}6import "fmt"7func main() {8    p.pos(10, 20)9    fmt.Println(p.x, p.y)10    p.pos(50, 60)11    fmt.Println(p.x, p.y)12}13import "fmt"14func main() {15    p.pos(10, 20)16    fmt.Println(p.x, p.y)17    p.pos(50, 60)18    fmt.Println(p.x, p.y)19    p.pos(70, 80)20    fmt.Println(p.x, p.y)21}22import "fmt"23func main() {24    p.pos(10, 20)25    fmt.Println(p.x, p.y)26    p.pos(50, 60)27    fmt.Println(p.x, p.y)28    p.pos(70, 80)29    fmt.Println(p.x, p.y)30    p.pos(90, 100)31    fmt.Println(p.x, p.y)32}33import "fmt"34func main() {35    p.pos(10, 20)36    fmt.Println(p.x, p.y)37    p.pos(50, 60)38    fmt.Println(p.x, p.y)39    p.pos(70, 80)40    fmt.Println(p.x, p.y)41    p.pos(90, 100)42    fmt.Println(p.x, p.y)43    p.pos(110, 120)44    fmt.Println(p.x, p.y)45}46import "fmt"47func main() {48    p.pos(10, 20)49    fmt.Println(p.x, p.y)50    p.pos(50, 60)51    fmt.Println(p.x, p.y)52    p.pos(70,

pos

Using AI Code Generation

1import (2func main() {3	x = prog.Prog{1, 2}4	fmt.Println(x.Pos())5}6import (7func main() {8	x = prog.Prog{1, 2}9	fmt.Println(x.Neg())10}11import (12func main() {13	x = prog.Prog{1, 2}14	fmt.Println(x.Add())15}16import (17func main() {18	x = prog.Prog{1, 2}19	fmt.Println(x.Sub())20}21import (22func main() {23	x = prog.Prog{1, 2}24	fmt.Println(x.Mul())25}26import (27func main() {28	x = prog.Prog{1, 2}29	fmt.Println(x.Div())30}31import (32func main() {33	x = prog.Prog{1, 2}34	fmt.Println(x.Mod())35}

pos

Using AI Code Generation

1import (2func main() {3	fmt.Println("Enter x and y")4	fmt.Scan(&x, &y)5	fmt.Println("Sum of ", x, " and ", y, " is ", prog.Pos(x+y))6}7import (8func main() {9	fmt.Println("Enter x and y")10	fmt.Scan(&x, &y)11	fmt.Println("Sum of ", x, " and ", y, " is ", prog.Neg(x+y))12}13import (14func main() {15	fmt.Println("Enter x and y")16	fmt.Scan(&x, &y)17	fmt.Println("Sum of ", x, " and ", y, " is ", prog.Add(x, y))18}19import (20func main() {21	fmt.Println("Enter x and y")22	fmt.Scan(&x, &y)23	fmt.Println("Sum of ", x, " and ", y, " is ", prog.Sub(x, y))24}25import (26func main() {27	fmt.Println("Enter x and y")28	fmt.Scan(&x, &y)29	fmt.Println("Sum of ", x, " and ", y, " is ", prog.Mul(x, y))30}31import (32func main() {33	fmt.Println("Enter x and y")34	fmt.Scan(&x, &y)35	fmt.Println("Sum of ", x, " and ", y, " is ", prog.Div(x, y))36}37import (38func main() {

pos

Using AI Code Generation

1import (2func main() {3	p := prog.NewProg()4	p.Set(2, 5)5	x, y := p.Pos()6	fmt.Println("x =", x, "y =", y)7}8type Prog struct {9}10func NewProg() *Prog {11	return new(Prog)12}13func (p *Prog) Set(x, y int) {14}15func (p *Prog) Pos() (int, int) {16}17import (18func TestSet(t *testing.T) {19	p := NewProg()20	p.Set(2, 5)21	x, y := p.Pos()22	if x != 2 || y != 5 {23		t.Error("Expected 2, 5 got", x, y)24	}25}26func TestPos(t *testing.T) {27	p := NewProg()28	x, y := p.Pos()29	if x != 2 || y != 5 {30		t.Error("Expected 2, 5 got", x, y)31	}32}33import (34func BenchmarkSet(b *testing.B) {35	p := NewProg()36	for i := 0; i < b.N; i++ {37		p.Set(2, 5)38	}39}40func BenchmarkPos(b *testing.B) {41	p := NewProg()42	for i := 0; i < b.N; i++ {43		p.Pos()44	}45}

pos

Using AI Code Generation

1import (2func main() {3	p := prog.NewProg(3)4	fmt.Println(p.Pos())5}6import (7func main() {8	p := prog.NewProg(3)9	fmt.Println(p.Pos())10}11type Prog struct {12}13func NewProg(pos int) *Prog {14	return &Prog{pos}15}16func (p *Prog) Pos() int {17}18type Prog struct {19}20func NewProg(pos int) *Prog {21	return &Prog{pos}22}23func (p *Prog) Pos() int {24}25type Prog struct {26}27func NewProg(pos int) *Prog {28	return &Prog{pos}29}30func (p *Prog) Pos() int {31}32type Prog struct {33}34func NewProg(pos int) *Prog {35	return &Prog{pos}36}37func (p *Prog) Pos() int {38}39type Prog struct {40}41func NewProg(pos int) *Prog {42	return &Prog{pos}43}44func (p *Prog) Pos() int {45}

pos

Using AI Code Generation

1import (2func main() {3	a = []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}4	fmt.Println("The position of the given element is", prog.Pos(a, 5))5}6func Pos(a []int, x int) int {7	for i, v := range a {8		if v == x {9		}10	}11}12import (13func main() {14	a = []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}15	fmt.Println("The position of the given element is", prog.Pos(a, 5))16}17func Pos(a []int, x int) int {18	for i, v := range a {19		if v == x {20		}21	}22}23import (24func main() {25	a = []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}26	fmt.Println("The position of the given element is", prog.Pos(a, 5))27}28func Pos(a []int, x int) int {29	for i, v := range a {30		if v == x {31		}32	}33}

pos

Using AI Code Generation

1import (2func main() {3	fmt.Println(prog.Pos(2,3))4}5func Pos(a, b int) int {6}7The import statement in 2.go uses the relative path 2. This means that the package is imported

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