terraform/vendor/github.com/antchfx/xpath/parse.go

1165 lines
25 KiB
Go
Raw Normal View History

Remove LGPL dependencies This changeset performs the following: - Updates `masterzen/winrm` vendor to include change from (https://github.com/masterzen/winrm/pull/73) - Updates `dylanmei/winrmtest` vendor to include change from (https://github.com/dylanmei/winrmtest/pull/4) - Updates `packer-community/winrmcp` vendor to include the removal of the `masterzen/winrm/winrm` sub-class as a result of the `winrm` CLI tool being removed from the `masterzen/winrm` repository. - Changes `communicator/winrm/communicator.go` to conform to the new ABI in the `masterzen/winrm` library. This should completely remove any LGPL licensed dependencies inside of the Terraform project. ``` $ make test ==> Checking that code complies with gofmt requirements... go generate $(go list ./... | grep -v /terraform/vendor/) 2017/08/20 13:40:16 Generated command/internal_plugin_list.go go test -i $(go list ./... | grep -v '/terraform/vendor/' | grep -v '/builtin/bins/') || exit 1 echo $(go list ./... | grep -v '/terraform/vendor/' | grep -v '/builtin/bins/') | \ xargs -t -n4 go test -timeout=60s -parallel=4 go test -timeout=60s -parallel=4 github.com/hashicorp/terraform github.com/hashicorp/terraform/backend github.com/hashicorp/terraform/backend/atlas github.com/hashicorp/terraform/backend/init ok github.com/hashicorp/terraform 0.011s ok github.com/hashicorp/terraform/backend 0.020s ok github.com/hashicorp/terraform/backend/atlas 0.634s ok github.com/hashicorp/terraform/backend/init 0.007s go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/backend/legacy github.com/hashicorp/terraform/backend/local github.com/hashicorp/terraform/backend/remote-state github.com/hashicorp/terraf orm/backend/remote-state/azure ok github.com/hashicorp/terraform/backend/legacy 0.009s ok github.com/hashicorp/terraform/backend/local 0.211s ok github.com/hashicorp/terraform/backend/remote-state 0.006s ok github.com/hashicorp/terraform/backend/remote-state/azure 0.010s go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/backend/remote-state/consul github.com/hashicorp/terraform/backend/remote-state/inmem github.com/hashicorp/terraform/backend/remote-state/s 3 github.com/hashicorp/terraform/backend/remote-state/swift ok github.com/hashicorp/terraform/backend/remote-state/consul 0.007s ok github.com/hashicorp/terraform/backend/remote-state/inmem 0.013s ok github.com/hashicorp/terraform/backend/remote-state/s3 0.007s ok github.com/hashicorp/terraform/backend/remote-state/swift 0.013s go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/builtin/providers/test github.com/hashicorp/terraform/builtin/provisioners/chef github.com/hashicorp/terraform/builtin/provisioners/file gi thub.com/hashicorp/terraform/builtin/provisioners/local-exec ok github.com/hashicorp/terraform/builtin/providers/test 1.544s ok github.com/hashicorp/terraform/builtin/provisioners/chef 0.017s ok github.com/hashicorp/terraform/builtin/provisioners/file 0.006s ok github.com/hashicorp/terraform/builtin/provisioners/local-exec 0.078s go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/builtin/provisioners/remote-exec github.com/hashicorp/terraform/builtin/provisioners/salt-masterless github.com/hashicorp/terraform/command github.com/hashicorp/terraform/command/clistate ok github.com/hashicorp/terraform/builtin/provisioners/remote-exec 1.037s ok github.com/hashicorp/terraform/builtin/provisioners/salt-masterless 0.008s ok github.com/hashicorp/terraform/command 14.589s ? github.com/hashicorp/terraform/command/clistate [no test files] go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/command/e2etest github.com/hashicorp/terraform/command/format github.com/hashicorp/terraform/communicator github.com/hashicorp/terraform/co mmunicator/remote ok github.com/hashicorp/terraform/command/e2etest 3.729s ok github.com/hashicorp/terraform/command/format 0.004s ok github.com/hashicorp/terraform/communicator 0.005s ok github.com/hashicorp/terraform/communicator/remote 0.003s [no tests to run] go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/communicator/shared github.com/hashicorp/terraform/communicator/ssh github.com/hashicorp/terraform/communicator/winrm github.com/hashicorp/ terraform/config ok github.com/hashicorp/terraform/communicator/shared 0.007s ok github.com/hashicorp/terraform/communicator/ssh 0.016s ok github.com/hashicorp/terraform/communicator/winrm 0.018s ok github.com/hashicorp/terraform/config 0.213s go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/config/module github.com/hashicorp/terraform/dag github.com/hashicorp/terraform/digraph github.com/hashicorp/terraform/flatmap ok github.com/hashicorp/terraform/config/module 0.044s ok github.com/hashicorp/terraform/dag 0.010s ok github.com/hashicorp/terraform/digraph 0.002s ok github.com/hashicorp/terraform/flatmap 0.002s go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/helper/acctest github.com/hashicorp/terraform/helper/config github.com/hashicorp/terraform/helper/copy github.com/hashicorp/terraform/helpe r/diff ? github.com/hashicorp/terraform/helper/acctest [no test files] ok github.com/hashicorp/terraform/helper/config 0.005s ? github.com/hashicorp/terraform/helper/copy [no test files] ok github.com/hashicorp/terraform/helper/diff 0.005s go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/helper/encryption github.com/hashicorp/terraform/helper/experiment github.com/hashicorp/terraform/helper/hashcode github.com/hashicorp/terr aform/helper/hilmapstructure ? github.com/hashicorp/terraform/helper/encryption [no test files] ok github.com/hashicorp/terraform/helper/experiment 0.001s ok github.com/hashicorp/terraform/helper/hashcode 0.001s ? github.com/hashicorp/terraform/helper/hilmapstructure [no test files] go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/helper/logging github.com/hashicorp/terraform/helper/mutexkv github.com/hashicorp/terraform/helper/pathorcontents github.com/hashicorp/terr aform/helper/resource ? github.com/hashicorp/terraform/helper/logging [no test files] ok github.com/hashicorp/terraform/helper/mutexkv 0.055s ok github.com/hashicorp/terraform/helper/pathorcontents 0.002s ok github.com/hashicorp/terraform/helper/resource 2.659s go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/helper/schema github.com/hashicorp/terraform/helper/shadow github.com/hashicorp/terraform/helper/signalwrapper github.com/hashicorp/terrafo rm/helper/slowmessage ok github.com/hashicorp/terraform/helper/schema 0.063s ok github.com/hashicorp/terraform/helper/shadow 0.156s ok github.com/hashicorp/terraform/helper/signalwrapper 0.022s ok github.com/hashicorp/terraform/helper/slowmessage 0.102s go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/helper/structure github.com/hashicorp/terraform/helper/validation github.com/hashicorp/terraform/helper/variables github.com/hashicorp/terr aform/helper/wrappedreadline ok github.com/hashicorp/terraform/helper/structure 0.004s ok github.com/hashicorp/terraform/helper/validation 0.004s ok github.com/hashicorp/terraform/helper/variables 0.006s ? github.com/hashicorp/terraform/helper/wrappedreadline [no test files] go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/helper/wrappedstreams github.com/hashicorp/terraform/moduledeps github.com/hashicorp/terraform/plugin github.com/hashicorp/terraform/plugin /discovery ? github.com/hashicorp/terraform/helper/wrappedstreams [no test files] ok github.com/hashicorp/terraform/moduledeps 0.004s ok github.com/hashicorp/terraform/plugin 0.046s ok github.com/hashicorp/terraform/plugin/discovery 0.029s go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/repl github.com/hashicorp/terraform/scripts github.com/hashicorp/terraform/state github.com/hashicorp/terraform/state/remote ok github.com/hashicorp/terraform/repl 0.006s ok github.com/hashicorp/terraform/scripts 0.008s ok github.com/hashicorp/terraform/state 2.617s ok github.com/hashicorp/terraform/state/remote 0.025s go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/terraform github.com/hashicorp/terraform/tools/terraform-bundle go test -timeout=60s -parallel=4 github.com/hashicorp/terraform/terraform github.com/hashicorp/terraform/tools/terraform-bundle ok github.com/hashicorp/terraform/terraform 4.222s ? github.com/hashicorp/terraform/tools/terraform-bundle [no test files] ```
2017-08-20 19:53:48 +02:00
package xpath
import (
"bytes"
"errors"
"fmt"
"strconv"
"unicode"
)
// A XPath expression token type.
type itemType int
const (
itemComma itemType = iota // ','
itemSlash // '/'
itemAt // '@'
itemDot // '.'
itemLParens // '('
itemRParens // ')'
itemLBracket // '['
itemRBracket // ']'
itemStar // '*'
itemPlus // '+'
itemMinus // '-'
itemEq // '='
itemLt // '<'
itemGt // '>'
itemBang // '!'
itemDollar // '$'
itemApos // '\''
itemQuote // '"'
itemUnion // '|'
itemNe // '!='
itemLe // '<='
itemGe // '>='
itemAnd // '&&'
itemOr // '||'
itemDotDot // '..'
itemSlashSlash // '//'
itemName // XML Name
itemString // Quoted string constant
itemNumber // Number constant
itemAxe // Axe (like child::)
itemEof // END
)
// A node is an XPath node in the parse tree.
type node interface {
Type() nodeType
}
// nodeType identifies the type of a parse tree node.
type nodeType int
func (t nodeType) Type() nodeType {
return t
}
const (
nodeRoot nodeType = iota
nodeAxis
nodeFilter
nodeFunction
nodeOperator
nodeVariable
nodeConstantOperand
)
type parser struct {
r *scanner
d int
}
// newOperatorNode returns new operator node OperatorNode.
func newOperatorNode(op string, left, right node) node {
return &operatorNode{nodeType: nodeOperator, Op: op, Left: left, Right: right}
}
// newOperand returns new constant operand node OperandNode.
func newOperandNode(v interface{}) node {
return &operandNode{nodeType: nodeConstantOperand, Val: v}
}
// newAxisNode returns new axis node AxisNode.
func newAxisNode(axeTyp, localName, prefix, prop string, n node) node {
return &axisNode{
nodeType: nodeAxis,
LocalName: localName,
Prefix: prefix,
AxeType: axeTyp,
Prop: prop,
Input: n,
}
}
// newVariableNode returns new variable node VariableNode.
func newVariableNode(prefix, name string) node {
return &variableNode{nodeType: nodeVariable, Name: name, Prefix: prefix}
}
// newFilterNode returns a new filter node FilterNode.
func newFilterNode(n, m node) node {
return &filterNode{nodeType: nodeFilter, Input: n, Condition: m}
}
// newRootNode returns a root node.
func newRootNode(s string) node {
return &rootNode{nodeType: nodeRoot, slash: s}
}
// newFunctionNode returns function call node.
func newFunctionNode(name, prefix string, args []node) node {
return &functionNode{nodeType: nodeFunction, Prefix: prefix, FuncName: name, Args: args}
}
// testOp reports whether current item name is an operand op.
func testOp(r *scanner, op string) bool {
return r.typ == itemName && r.prefix == "" && r.name == op
}
func isPrimaryExpr(r *scanner) bool {
switch r.typ {
case itemString, itemNumber, itemDollar, itemLParens:
return true
case itemName:
return r.canBeFunc && !isNodeType(r)
}
return false
}
func isNodeType(r *scanner) bool {
switch r.name {
case "node", "text", "processing-instruction", "comment":
return r.prefix == ""
}
return false
}
func isStep(item itemType) bool {
switch item {
case itemDot, itemDotDot, itemAt, itemAxe, itemStar, itemName:
return true
}
return false
}
func checkItem(r *scanner, typ itemType) {
if r.typ != typ {
panic(fmt.Sprintf("%s has an invalid token", r.text))
}
}
// parseExpression parsing the expression with input node n.
func (p *parser) parseExpression(n node) node {
if p.d = p.d + 1; p.d > 200 {
panic("the xpath query is too complex(depth > 200)")
}
n = p.parseOrExpr(n)
p.d--
return n
}
// next scanning next item on forward.
func (p *parser) next() bool {
return p.r.nextItem()
}
func (p *parser) skipItem(typ itemType) {
checkItem(p.r, typ)
p.next()
}
// OrExpr ::= AndExpr | OrExpr 'or' AndExpr
func (p *parser) parseOrExpr(n node) node {
opnd := p.parseAndExpr(n)
for {
if !testOp(p.r, "or") {
break
}
p.next()
opnd = newOperatorNode("or", opnd, p.parseAndExpr(n))
}
return opnd
}
// AndExpr ::= EqualityExpr | AndExpr 'and' EqualityExpr
func (p *parser) parseAndExpr(n node) node {
opnd := p.parseEqualityExpr(n)
for {
if !testOp(p.r, "and") {
break
}
p.next()
opnd = newOperatorNode("and", opnd, p.parseEqualityExpr(n))
}
return opnd
}
// EqualityExpr ::= RelationalExpr | EqualityExpr '=' RelationalExpr | EqualityExpr '!=' RelationalExpr
func (p *parser) parseEqualityExpr(n node) node {
opnd := p.parseRelationalExpr(n)
Loop:
for {
var op string
switch p.r.typ {
case itemEq:
op = "="
case itemNe:
op = "!="
default:
break Loop
}
p.next()
opnd = newOperatorNode(op, opnd, p.parseRelationalExpr(n))
}
return opnd
}
// RelationalExpr ::= AdditiveExpr | RelationalExpr '<' AdditiveExpr | RelationalExpr '>' AdditiveExpr
// | RelationalExpr '<=' AdditiveExpr
// | RelationalExpr '>=' AdditiveExpr
func (p *parser) parseRelationalExpr(n node) node {
opnd := p.parseAdditiveExpr(n)
Loop:
for {
var op string
switch p.r.typ {
case itemLt:
op = "<"
case itemGt:
op = ">"
case itemLe:
op = "<="
case itemGe:
op = ">="
default:
break Loop
}
p.next()
opnd = newOperatorNode(op, opnd, p.parseAdditiveExpr(n))
}
return opnd
}
// AdditiveExpr ::= MultiplicativeExpr | AdditiveExpr '+' MultiplicativeExpr | AdditiveExpr '-' MultiplicativeExpr
func (p *parser) parseAdditiveExpr(n node) node {
opnd := p.parseMultiplicativeExpr(n)
Loop:
for {
var op string
switch p.r.typ {
case itemPlus:
op = "+"
case itemMinus:
op = "-"
default:
break Loop
}
p.next()
opnd = newOperatorNode(op, opnd, p.parseMultiplicativeExpr(n))
}
return opnd
}
// MultiplicativeExpr ::= UnaryExpr | MultiplicativeExpr MultiplyOperator(*) UnaryExpr
// | MultiplicativeExpr 'div' UnaryExpr | MultiplicativeExpr 'mod' UnaryExpr
func (p *parser) parseMultiplicativeExpr(n node) node {
opnd := p.parseUnaryExpr(n)
Loop:
for {
var op string
if p.r.typ == itemStar {
op = "*"
} else if testOp(p.r, "div") || testOp(p.r, "mod") {
op = p.r.name
} else {
break Loop
}
p.next()
opnd = newOperatorNode(op, opnd, p.parseUnaryExpr(n))
}
return opnd
}
// UnaryExpr ::= UnionExpr | '-' UnaryExpr
func (p *parser) parseUnaryExpr(n node) node {
minus := false
// ignore '-' sequence
for p.r.typ == itemMinus {
p.next()
minus = !minus
}
opnd := p.parseUnionExpr(n)
if minus {
opnd = newOperatorNode("*", opnd, newOperandNode(float64(-1)))
}
return opnd
}
// UnionExpr ::= PathExpr | UnionExpr '|' PathExpr
func (p *parser) parseUnionExpr(n node) node {
opnd := p.parsePathExpr(n)
Loop:
for {
if p.r.typ != itemUnion {
break Loop
}
p.next()
opnd2 := p.parsePathExpr(n)
// Checking the node type that must be is node set type?
opnd = newOperatorNode("|", opnd, opnd2)
}
return opnd
}
// PathExpr ::= LocationPath | FilterExpr | FilterExpr '/' RelativeLocationPath | FilterExpr '//' RelativeLocationPath
func (p *parser) parsePathExpr(n node) node {
var opnd node
if isPrimaryExpr(p.r) {
opnd = p.parseFilterExpr(n)
switch p.r.typ {
case itemSlash:
p.next()
opnd = p.parseRelativeLocationPath(opnd)
case itemSlashSlash:
p.next()
opnd = p.parseRelativeLocationPath(newAxisNode("descendant-or-self", "", "", "", opnd))
}
} else {
opnd = p.parseLocationPath(nil)
}
return opnd
}
// FilterExpr ::= PrimaryExpr | FilterExpr Predicate
func (p *parser) parseFilterExpr(n node) node {
opnd := p.parsePrimaryExpr(n)
if p.r.typ == itemLBracket {
opnd = newFilterNode(opnd, p.parsePredicate(opnd))
}
return opnd
}
// Predicate ::= '[' PredicateExpr ']'
func (p *parser) parsePredicate(n node) node {
p.skipItem(itemLBracket)
opnd := p.parseExpression(n)
p.skipItem(itemRBracket)
return opnd
}
// LocationPath ::= RelativeLocationPath | AbsoluteLocationPath
func (p *parser) parseLocationPath(n node) (opnd node) {
switch p.r.typ {
case itemSlash:
p.next()
opnd = newRootNode("/")
if isStep(p.r.typ) {
opnd = p.parseRelativeLocationPath(opnd) // ?? child:: or self ??
}
case itemSlashSlash:
p.next()
opnd = newRootNode("//")
opnd = p.parseRelativeLocationPath(newAxisNode("descendant-or-self", "", "", "", opnd))
default:
opnd = p.parseRelativeLocationPath(n)
}
return opnd
}
// RelativeLocationPath ::= Step | RelativeLocationPath '/' Step | AbbreviatedRelativeLocationPath
func (p *parser) parseRelativeLocationPath(n node) node {
opnd := n
Loop:
for {
opnd = p.parseStep(opnd)
switch p.r.typ {
case itemSlashSlash:
p.next()
opnd = newAxisNode("descendant-or-self", "", "", "", opnd)
case itemSlash:
p.next()
default:
break Loop
}
}
return opnd
}
// Step ::= AxisSpecifier NodeTest Predicate* | AbbreviatedStep
func (p *parser) parseStep(n node) node {
axeTyp := "child" // default axes value.
if p.r.typ == itemDot || p.r.typ == itemDotDot {
if p.r.typ == itemDot {
axeTyp = "self"
} else {
axeTyp = "parent"
}
p.next()
return newAxisNode(axeTyp, "", "", "", n)
}
switch p.r.typ {
case itemAt:
p.next()
axeTyp = "attribute"
case itemAxe:
axeTyp = p.r.name
p.next()
}
opnd := p.parseNodeTest(n, axeTyp)
for p.r.typ == itemLBracket {
opnd = newFilterNode(opnd, p.parsePredicate(opnd))
}
return opnd
}
// NodeTest ::= NameTest | nodeType '(' ')' | 'processing-instruction' '(' Literal ')'
func (p *parser) parseNodeTest(n node, axeTyp string) (opnd node) {
switch p.r.typ {
case itemName:
if p.r.canBeFunc && isNodeType(p.r) {
var prop string
switch p.r.name {
case "comment", "text", "processing-instruction", "node":
prop = p.r.name
}
var name string
p.next()
p.skipItem(itemLParens)
if prop == "processing-instruction" && p.r.typ != itemRParens {
checkItem(p.r, itemString)
name = p.r.strval
p.next()
}
p.skipItem(itemRParens)
opnd = newAxisNode(axeTyp, name, "", prop, n)
} else {
prefix := p.r.prefix
name := p.r.name
p.next()
if p.r.name == "*" {
name = ""
}
opnd = newAxisNode(axeTyp, name, prefix, "", n)
}
case itemStar:
opnd = newAxisNode(axeTyp, "", "", "", n)
p.next()
default:
panic("expression must evaluate to a node-set")
}
return opnd
}
// PrimaryExpr ::= VariableReference | '(' Expr ')' | Literal | Number | FunctionCall
func (p *parser) parsePrimaryExpr(n node) (opnd node) {
switch p.r.typ {
case itemString:
opnd = newOperandNode(p.r.strval)
p.next()
case itemNumber:
opnd = newOperandNode(p.r.numval)
p.next()
case itemDollar:
p.next()
checkItem(p.r, itemName)
opnd = newVariableNode(p.r.prefix, p.r.name)
p.next()
case itemLParens:
p.next()
opnd = p.parseExpression(n)
p.skipItem(itemRParens)
case itemName:
if p.r.canBeFunc && !isNodeType(p.r) {
opnd = p.parseMethod(nil)
}
}
return opnd
}
// FunctionCall ::= FunctionName '(' ( Argument ( ',' Argument )* )? ')'
func (p *parser) parseMethod(n node) node {
var args []node
name := p.r.name
prefix := p.r.prefix
p.skipItem(itemName)
p.skipItem(itemLParens)
if p.r.typ != itemRParens {
for {
args = append(args, p.parseExpression(n))
if p.r.typ == itemRParens {
break
}
p.skipItem(itemComma)
}
}
p.skipItem(itemRParens)
return newFunctionNode(name, prefix, args)
}
// Parse parsing the XPath express string expr and returns a tree node.
func parse(expr string) node {
r := &scanner{text: expr}
r.nextChar()
r.nextItem()
p := &parser{r: r}
return p.parseExpression(nil)
}
// rootNode holds a top-level node of tree.
type rootNode struct {
nodeType
slash string
}
func (r *rootNode) String() string {
return r.slash
}
// operatorNode holds two Nodes operator.
type operatorNode struct {
nodeType
Op string
Left, Right node
}
func (o *operatorNode) String() string {
return fmt.Sprintf("%v%s%v", o.Left, o.Op, o.Right)
}
// axisNode holds a location step.
type axisNode struct {
nodeType
Input node
Prop string // node-test name.[comment|text|processing-instruction|node]
AxeType string // name of the axes.[attribute|ancestor|child|....]
LocalName string // local part name of node.
Prefix string // prefix name of node.
}
func (a *axisNode) String() string {
var b bytes.Buffer
if a.AxeType != "" {
b.Write([]byte(a.AxeType + "::"))
}
if a.Prefix != "" {
b.Write([]byte(a.Prefix + ":"))
}
b.Write([]byte(a.LocalName))
if a.Prop != "" {
b.Write([]byte("/" + a.Prop + "()"))
}
return b.String()
}
// operandNode holds a constant operand.
type operandNode struct {
nodeType
Val interface{}
}
func (o *operandNode) String() string {
return fmt.Sprintf("%v", o.Val)
}
// filterNode holds a condition filter.
type filterNode struct {
nodeType
Input, Condition node
}
func (f *filterNode) String() string {
return fmt.Sprintf("%s[%s]", f.Input, f.Condition)
}
// variableNode holds a variable.
type variableNode struct {
nodeType
Name, Prefix string
}
func (v *variableNode) String() string {
if v.Prefix == "" {
return v.Name
}
return fmt.Sprintf("%s:%s", v.Prefix, v.Name)
}
// functionNode holds a function call.
type functionNode struct {
nodeType
Args []node
Prefix string
FuncName string // function name
}
func (f *functionNode) String() string {
var b bytes.Buffer
// fun(arg1, ..., argn)
b.Write([]byte(f.FuncName))
b.Write([]byte("("))
for i, arg := range f.Args {
if i > 0 {
b.Write([]byte(","))
}
b.Write([]byte(fmt.Sprintf("%s", arg)))
}
b.Write([]byte(")"))
return b.String()
}
type scanner struct {
text, name, prefix string
pos int
curr rune
typ itemType
strval string // text value at current pos
numval float64 // number value at current pos
canBeFunc bool
}
func (s *scanner) nextChar() bool {
if s.pos >= len(s.text) {
s.curr = rune(0)
return false
}
s.curr = rune(s.text[s.pos])
s.pos += 1
return true
}
func (s *scanner) nextItem() bool {
s.skipSpace()
switch s.curr {
case 0:
s.typ = itemEof
return false
case ',', '@', '(', ')', '|', '*', '[', ']', '+', '-', '=', '#', '$':
s.typ = asItemType(s.curr)
s.nextChar()
case '<':
s.typ = itemLt
s.nextChar()
if s.curr == '=' {
s.typ = itemLe
s.nextChar()
}
case '>':
s.typ = itemGt
s.nextChar()
if s.curr == '=' {
s.typ = itemGe
s.nextChar()
}
case '!':
s.typ = itemBang
s.nextChar()
if s.curr == '=' {
s.typ = itemNe
s.nextChar()
}
case '.':
s.typ = itemDot
s.nextChar()
if s.curr == '.' {
s.typ = itemDotDot
s.nextChar()
} else if isDigit(s.curr) {
s.typ = itemNumber
s.numval = s.scanFraction()
}
case '/':
s.typ = itemSlash
s.nextChar()
if s.curr == '/' {
s.typ = itemSlashSlash
s.nextChar()
}
case '"', '\'':
s.typ = itemString
s.strval = s.scanString()
default:
if isDigit(s.curr) {
s.typ = itemNumber
s.numval = s.scanNumber()
} else if isName(s.curr) {
s.typ = itemName
s.name = s.scanName()
s.prefix = ""
// "foo:bar" is one itemem not three because it doesn't allow spaces in between
// We should distinct it from "foo::" and need process "foo ::" as well
if s.curr == ':' {
s.nextChar()
// can be "foo:bar" or "foo::"
if s.curr == ':' {
// "foo::"
s.nextChar()
s.typ = itemAxe
} else { // "foo:*", "foo:bar" or "foo: "
s.prefix = s.name
if s.curr == '*' {
s.nextChar()
s.name = "*"
} else if isName(s.curr) {
s.name = s.scanName()
} else {
panic(fmt.Sprintf("%s has an invalid qualified name.", s.text))
}
}
} else {
s.skipSpace()
if s.curr == ':' {
s.nextChar()
// it can be "foo ::" or just "foo :"
if s.curr == ':' {
s.nextChar()
s.typ = itemAxe
} else {
panic(fmt.Sprintf("%s has an invalid qualified name.", s.text))
}
}
}
s.skipSpace()
s.canBeFunc = s.curr == '('
} else {
panic(fmt.Sprintf("%s has an invalid token.", s.text))
}
}
return true
}
func (s *scanner) skipSpace() {
Loop:
for {
if !unicode.IsSpace(s.curr) || !s.nextChar() {
break Loop
}
}
}
func (s *scanner) scanFraction() float64 {
var (
i = s.pos - 2
c = 1 // '.'
)
for isDigit(s.curr) {
s.nextChar()
c++
}
v, err := strconv.ParseFloat(s.text[i:i+c], 64)
if err != nil {
panic(fmt.Errorf("xpath: scanFraction parse float got error: %v", err))
}
return v
}
func (s *scanner) scanNumber() float64 {
var (
c int
i = s.pos - 1
)
for isDigit(s.curr) {
s.nextChar()
c++
}
if s.curr == '.' {
s.nextChar()
c++
for isDigit(s.curr) {
s.nextChar()
c++
}
}
v, err := strconv.ParseFloat(s.text[i:i+c], 64)
if err != nil {
panic(fmt.Errorf("xpath: scanNumber parse float got error: %v", err))
}
return v
}
func (s *scanner) scanString() string {
var (
c = 0
end = s.curr
)
s.nextChar()
i := s.pos - 1
for s.curr != end {
if !s.nextChar() {
panic(errors.New("xpath: scanString got unclosed string"))
}
c++
}
s.nextChar()
return s.text[i : i+c]
}
func (s *scanner) scanName() string {
var (
c int
i = s.pos - 1
)
for isName(s.curr) {
c++
if !s.nextChar() {
break
}
}
return s.text[i : i+c]
}
func isName(r rune) bool {
return string(r) != ":" && string(r) != "/" &&
(unicode.Is(first, r) || unicode.Is(second, r) || string(r) == "*")
}
func isDigit(r rune) bool {
return unicode.IsDigit(r)
}
func asItemType(r rune) itemType {
switch r {
case ',':
return itemComma
case '@':
return itemAt
case '(':
return itemLParens
case ')':
return itemRParens
case '|':
return itemUnion
case '*':
return itemStar
case '[':
return itemLBracket
case ']':
return itemRBracket
case '+':
return itemPlus
case '-':
return itemMinus
case '=':
return itemEq
case '$':
return itemDollar
}
panic(fmt.Errorf("unknown item: %v", r))
}
var first = &unicode.RangeTable{
R16: []unicode.Range16{
{0x003A, 0x003A, 1},
{0x0041, 0x005A, 1},
{0x005F, 0x005F, 1},
{0x0061, 0x007A, 1},
{0x00C0, 0x00D6, 1},
{0x00D8, 0x00F6, 1},
{0x00F8, 0x00FF, 1},
{0x0100, 0x0131, 1},
{0x0134, 0x013E, 1},
{0x0141, 0x0148, 1},
{0x014A, 0x017E, 1},
{0x0180, 0x01C3, 1},
{0x01CD, 0x01F0, 1},
{0x01F4, 0x01F5, 1},
{0x01FA, 0x0217, 1},
{0x0250, 0x02A8, 1},
{0x02BB, 0x02C1, 1},
{0x0386, 0x0386, 1},
{0x0388, 0x038A, 1},
{0x038C, 0x038C, 1},
{0x038E, 0x03A1, 1},
{0x03A3, 0x03CE, 1},
{0x03D0, 0x03D6, 1},
{0x03DA, 0x03E0, 2},
{0x03E2, 0x03F3, 1},
{0x0401, 0x040C, 1},
{0x040E, 0x044F, 1},
{0x0451, 0x045C, 1},
{0x045E, 0x0481, 1},
{0x0490, 0x04C4, 1},
{0x04C7, 0x04C8, 1},
{0x04CB, 0x04CC, 1},
{0x04D0, 0x04EB, 1},
{0x04EE, 0x04F5, 1},
{0x04F8, 0x04F9, 1},
{0x0531, 0x0556, 1},
{0x0559, 0x0559, 1},
{0x0561, 0x0586, 1},
{0x05D0, 0x05EA, 1},
{0x05F0, 0x05F2, 1},
{0x0621, 0x063A, 1},
{0x0641, 0x064A, 1},
{0x0671, 0x06B7, 1},
{0x06BA, 0x06BE, 1},
{0x06C0, 0x06CE, 1},
{0x06D0, 0x06D3, 1},
{0x06D5, 0x06D5, 1},
{0x06E5, 0x06E6, 1},
{0x0905, 0x0939, 1},
{0x093D, 0x093D, 1},
{0x0958, 0x0961, 1},
{0x0985, 0x098C, 1},
{0x098F, 0x0990, 1},
{0x0993, 0x09A8, 1},
{0x09AA, 0x09B0, 1},
{0x09B2, 0x09B2, 1},
{0x09B6, 0x09B9, 1},
{0x09DC, 0x09DD, 1},
{0x09DF, 0x09E1, 1},
{0x09F0, 0x09F1, 1},
{0x0A05, 0x0A0A, 1},
{0x0A0F, 0x0A10, 1},
{0x0A13, 0x0A28, 1},
{0x0A2A, 0x0A30, 1},
{0x0A32, 0x0A33, 1},
{0x0A35, 0x0A36, 1},
{0x0A38, 0x0A39, 1},
{0x0A59, 0x0A5C, 1},
{0x0A5E, 0x0A5E, 1},
{0x0A72, 0x0A74, 1},
{0x0A85, 0x0A8B, 1},
{0x0A8D, 0x0A8D, 1},
{0x0A8F, 0x0A91, 1},
{0x0A93, 0x0AA8, 1},
{0x0AAA, 0x0AB0, 1},
{0x0AB2, 0x0AB3, 1},
{0x0AB5, 0x0AB9, 1},
{0x0ABD, 0x0AE0, 0x23},
{0x0B05, 0x0B0C, 1},
{0x0B0F, 0x0B10, 1},
{0x0B13, 0x0B28, 1},
{0x0B2A, 0x0B30, 1},
{0x0B32, 0x0B33, 1},
{0x0B36, 0x0B39, 1},
{0x0B3D, 0x0B3D, 1},
{0x0B5C, 0x0B5D, 1},
{0x0B5F, 0x0B61, 1},
{0x0B85, 0x0B8A, 1},
{0x0B8E, 0x0B90, 1},
{0x0B92, 0x0B95, 1},
{0x0B99, 0x0B9A, 1},
{0x0B9C, 0x0B9C, 1},
{0x0B9E, 0x0B9F, 1},
{0x0BA3, 0x0BA4, 1},
{0x0BA8, 0x0BAA, 1},
{0x0BAE, 0x0BB5, 1},
{0x0BB7, 0x0BB9, 1},
{0x0C05, 0x0C0C, 1},
{0x0C0E, 0x0C10, 1},
{0x0C12, 0x0C28, 1},
{0x0C2A, 0x0C33, 1},
{0x0C35, 0x0C39, 1},
{0x0C60, 0x0C61, 1},
{0x0C85, 0x0C8C, 1},
{0x0C8E, 0x0C90, 1},
{0x0C92, 0x0CA8, 1},
{0x0CAA, 0x0CB3, 1},
{0x0CB5, 0x0CB9, 1},
{0x0CDE, 0x0CDE, 1},
{0x0CE0, 0x0CE1, 1},
{0x0D05, 0x0D0C, 1},
{0x0D0E, 0x0D10, 1},
{0x0D12, 0x0D28, 1},
{0x0D2A, 0x0D39, 1},
{0x0D60, 0x0D61, 1},
{0x0E01, 0x0E2E, 1},
{0x0E30, 0x0E30, 1},
{0x0E32, 0x0E33, 1},
{0x0E40, 0x0E45, 1},
{0x0E81, 0x0E82, 1},
{0x0E84, 0x0E84, 1},
{0x0E87, 0x0E88, 1},
{0x0E8A, 0x0E8D, 3},
{0x0E94, 0x0E97, 1},
{0x0E99, 0x0E9F, 1},
{0x0EA1, 0x0EA3, 1},
{0x0EA5, 0x0EA7, 2},
{0x0EAA, 0x0EAB, 1},
{0x0EAD, 0x0EAE, 1},
{0x0EB0, 0x0EB0, 1},
{0x0EB2, 0x0EB3, 1},
{0x0EBD, 0x0EBD, 1},
{0x0EC0, 0x0EC4, 1},
{0x0F40, 0x0F47, 1},
{0x0F49, 0x0F69, 1},
{0x10A0, 0x10C5, 1},
{0x10D0, 0x10F6, 1},
{0x1100, 0x1100, 1},
{0x1102, 0x1103, 1},
{0x1105, 0x1107, 1},
{0x1109, 0x1109, 1},
{0x110B, 0x110C, 1},
{0x110E, 0x1112, 1},
{0x113C, 0x1140, 2},
{0x114C, 0x1150, 2},
{0x1154, 0x1155, 1},
{0x1159, 0x1159, 1},
{0x115F, 0x1161, 1},
{0x1163, 0x1169, 2},
{0x116D, 0x116E, 1},
{0x1172, 0x1173, 1},
{0x1175, 0x119E, 0x119E - 0x1175},
{0x11A8, 0x11AB, 0x11AB - 0x11A8},
{0x11AE, 0x11AF, 1},
{0x11B7, 0x11B8, 1},
{0x11BA, 0x11BA, 1},
{0x11BC, 0x11C2, 1},
{0x11EB, 0x11F0, 0x11F0 - 0x11EB},
{0x11F9, 0x11F9, 1},
{0x1E00, 0x1E9B, 1},
{0x1EA0, 0x1EF9, 1},
{0x1F00, 0x1F15, 1},
{0x1F18, 0x1F1D, 1},
{0x1F20, 0x1F45, 1},
{0x1F48, 0x1F4D, 1},
{0x1F50, 0x1F57, 1},
{0x1F59, 0x1F5B, 0x1F5B - 0x1F59},
{0x1F5D, 0x1F5D, 1},
{0x1F5F, 0x1F7D, 1},
{0x1F80, 0x1FB4, 1},
{0x1FB6, 0x1FBC, 1},
{0x1FBE, 0x1FBE, 1},
{0x1FC2, 0x1FC4, 1},
{0x1FC6, 0x1FCC, 1},
{0x1FD0, 0x1FD3, 1},
{0x1FD6, 0x1FDB, 1},
{0x1FE0, 0x1FEC, 1},
{0x1FF2, 0x1FF4, 1},
{0x1FF6, 0x1FFC, 1},
{0x2126, 0x2126, 1},
{0x212A, 0x212B, 1},
{0x212E, 0x212E, 1},
{0x2180, 0x2182, 1},
{0x3007, 0x3007, 1},
{0x3021, 0x3029, 1},
{0x3041, 0x3094, 1},
{0x30A1, 0x30FA, 1},
{0x3105, 0x312C, 1},
{0x4E00, 0x9FA5, 1},
{0xAC00, 0xD7A3, 1},
},
}
var second = &unicode.RangeTable{
R16: []unicode.Range16{
{0x002D, 0x002E, 1},
{0x0030, 0x0039, 1},
{0x00B7, 0x00B7, 1},
{0x02D0, 0x02D1, 1},
{0x0300, 0x0345, 1},
{0x0360, 0x0361, 1},
{0x0387, 0x0387, 1},
{0x0483, 0x0486, 1},
{0x0591, 0x05A1, 1},
{0x05A3, 0x05B9, 1},
{0x05BB, 0x05BD, 1},
{0x05BF, 0x05BF, 1},
{0x05C1, 0x05C2, 1},
{0x05C4, 0x0640, 0x0640 - 0x05C4},
{0x064B, 0x0652, 1},
{0x0660, 0x0669, 1},
{0x0670, 0x0670, 1},
{0x06D6, 0x06DC, 1},
{0x06DD, 0x06DF, 1},
{0x06E0, 0x06E4, 1},
{0x06E7, 0x06E8, 1},
{0x06EA, 0x06ED, 1},
{0x06F0, 0x06F9, 1},
{0x0901, 0x0903, 1},
{0x093C, 0x093C, 1},
{0x093E, 0x094C, 1},
{0x094D, 0x094D, 1},
{0x0951, 0x0954, 1},
{0x0962, 0x0963, 1},
{0x0966, 0x096F, 1},
{0x0981, 0x0983, 1},
{0x09BC, 0x09BC, 1},
{0x09BE, 0x09BF, 1},
{0x09C0, 0x09C4, 1},
{0x09C7, 0x09C8, 1},
{0x09CB, 0x09CD, 1},
{0x09D7, 0x09D7, 1},
{0x09E2, 0x09E3, 1},
{0x09E6, 0x09EF, 1},
{0x0A02, 0x0A3C, 0x3A},
{0x0A3E, 0x0A3F, 1},
{0x0A40, 0x0A42, 1},
{0x0A47, 0x0A48, 1},
{0x0A4B, 0x0A4D, 1},
{0x0A66, 0x0A6F, 1},
{0x0A70, 0x0A71, 1},
{0x0A81, 0x0A83, 1},
{0x0ABC, 0x0ABC, 1},
{0x0ABE, 0x0AC5, 1},
{0x0AC7, 0x0AC9, 1},
{0x0ACB, 0x0ACD, 1},
{0x0AE6, 0x0AEF, 1},
{0x0B01, 0x0B03, 1},
{0x0B3C, 0x0B3C, 1},
{0x0B3E, 0x0B43, 1},
{0x0B47, 0x0B48, 1},
{0x0B4B, 0x0B4D, 1},
{0x0B56, 0x0B57, 1},
{0x0B66, 0x0B6F, 1},
{0x0B82, 0x0B83, 1},
{0x0BBE, 0x0BC2, 1},
{0x0BC6, 0x0BC8, 1},
{0x0BCA, 0x0BCD, 1},
{0x0BD7, 0x0BD7, 1},
{0x0BE7, 0x0BEF, 1},
{0x0C01, 0x0C03, 1},
{0x0C3E, 0x0C44, 1},
{0x0C46, 0x0C48, 1},
{0x0C4A, 0x0C4D, 1},
{0x0C55, 0x0C56, 1},
{0x0C66, 0x0C6F, 1},
{0x0C82, 0x0C83, 1},
{0x0CBE, 0x0CC4, 1},
{0x0CC6, 0x0CC8, 1},
{0x0CCA, 0x0CCD, 1},
{0x0CD5, 0x0CD6, 1},
{0x0CE6, 0x0CEF, 1},
{0x0D02, 0x0D03, 1},
{0x0D3E, 0x0D43, 1},
{0x0D46, 0x0D48, 1},
{0x0D4A, 0x0D4D, 1},
{0x0D57, 0x0D57, 1},
{0x0D66, 0x0D6F, 1},
{0x0E31, 0x0E31, 1},
{0x0E34, 0x0E3A, 1},
{0x0E46, 0x0E46, 1},
{0x0E47, 0x0E4E, 1},
{0x0E50, 0x0E59, 1},
{0x0EB1, 0x0EB1, 1},
{0x0EB4, 0x0EB9, 1},
{0x0EBB, 0x0EBC, 1},
{0x0EC6, 0x0EC6, 1},
{0x0EC8, 0x0ECD, 1},
{0x0ED0, 0x0ED9, 1},
{0x0F18, 0x0F19, 1},
{0x0F20, 0x0F29, 1},
{0x0F35, 0x0F39, 2},
{0x0F3E, 0x0F3F, 1},
{0x0F71, 0x0F84, 1},
{0x0F86, 0x0F8B, 1},
{0x0F90, 0x0F95, 1},
{0x0F97, 0x0F97, 1},
{0x0F99, 0x0FAD, 1},
{0x0FB1, 0x0FB7, 1},
{0x0FB9, 0x0FB9, 1},
{0x20D0, 0x20DC, 1},
{0x20E1, 0x3005, 0x3005 - 0x20E1},
{0x302A, 0x302F, 1},
{0x3031, 0x3035, 1},
{0x3099, 0x309A, 1},
{0x309D, 0x309E, 1},
{0x30FC, 0x30FE, 1},
},
}