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path: root/vendor/gopkg.in/yaml.v2/decode.go
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-rw-r--r--vendor/gopkg.in/yaml.v2/decode.go775
1 files changed, 0 insertions, 775 deletions
diff --git a/vendor/gopkg.in/yaml.v2/decode.go b/vendor/gopkg.in/yaml.v2/decode.go
deleted file mode 100644
index e4e56e2..0000000
--- a/vendor/gopkg.in/yaml.v2/decode.go
+++ /dev/null
@@ -1,775 +0,0 @@
-package yaml
-
-import (
- "encoding"
- "encoding/base64"
- "fmt"
- "io"
- "math"
- "reflect"
- "strconv"
- "time"
-)
-
-const (
- documentNode = 1 << iota
- mappingNode
- sequenceNode
- scalarNode
- aliasNode
-)
-
-type node struct {
- kind int
- line, column int
- tag string
- // For an alias node, alias holds the resolved alias.
- alias *node
- value string
- implicit bool
- children []*node
- anchors map[string]*node
-}
-
-// ----------------------------------------------------------------------------
-// Parser, produces a node tree out of a libyaml event stream.
-
-type parser struct {
- parser yaml_parser_t
- event yaml_event_t
- doc *node
- doneInit bool
-}
-
-func newParser(b []byte) *parser {
- p := parser{}
- if !yaml_parser_initialize(&p.parser) {
- panic("failed to initialize YAML emitter")
- }
- if len(b) == 0 {
- b = []byte{'\n'}
- }
- yaml_parser_set_input_string(&p.parser, b)
- return &p
-}
-
-func newParserFromReader(r io.Reader) *parser {
- p := parser{}
- if !yaml_parser_initialize(&p.parser) {
- panic("failed to initialize YAML emitter")
- }
- yaml_parser_set_input_reader(&p.parser, r)
- return &p
-}
-
-func (p *parser) init() {
- if p.doneInit {
- return
- }
- p.expect(yaml_STREAM_START_EVENT)
- p.doneInit = true
-}
-
-func (p *parser) destroy() {
- if p.event.typ != yaml_NO_EVENT {
- yaml_event_delete(&p.event)
- }
- yaml_parser_delete(&p.parser)
-}
-
-// expect consumes an event from the event stream and
-// checks that it's of the expected type.
-func (p *parser) expect(e yaml_event_type_t) {
- if p.event.typ == yaml_NO_EVENT {
- if !yaml_parser_parse(&p.parser, &p.event) {
- p.fail()
- }
- }
- if p.event.typ == yaml_STREAM_END_EVENT {
- failf("attempted to go past the end of stream; corrupted value?")
- }
- if p.event.typ != e {
- p.parser.problem = fmt.Sprintf("expected %s event but got %s", e, p.event.typ)
- p.fail()
- }
- yaml_event_delete(&p.event)
- p.event.typ = yaml_NO_EVENT
-}
-
-// peek peeks at the next event in the event stream,
-// puts the results into p.event and returns the event type.
-func (p *parser) peek() yaml_event_type_t {
- if p.event.typ != yaml_NO_EVENT {
- return p.event.typ
- }
- if !yaml_parser_parse(&p.parser, &p.event) {
- p.fail()
- }
- return p.event.typ
-}
-
-func (p *parser) fail() {
- var where string
- var line int
- if p.parser.problem_mark.line != 0 {
- line = p.parser.problem_mark.line
- // Scanner errors don't iterate line before returning error
- if p.parser.error == yaml_SCANNER_ERROR {
- line++
- }
- } else if p.parser.context_mark.line != 0 {
- line = p.parser.context_mark.line
- }
- if line != 0 {
- where = "line " + strconv.Itoa(line) + ": "
- }
- var msg string
- if len(p.parser.problem) > 0 {
- msg = p.parser.problem
- } else {
- msg = "unknown problem parsing YAML content"
- }
- failf("%s%s", where, msg)
-}
-
-func (p *parser) anchor(n *node, anchor []byte) {
- if anchor != nil {
- p.doc.anchors[string(anchor)] = n
- }
-}
-
-func (p *parser) parse() *node {
- p.init()
- switch p.peek() {
- case yaml_SCALAR_EVENT:
- return p.scalar()
- case yaml_ALIAS_EVENT:
- return p.alias()
- case yaml_MAPPING_START_EVENT:
- return p.mapping()
- case yaml_SEQUENCE_START_EVENT:
- return p.sequence()
- case yaml_DOCUMENT_START_EVENT:
- return p.document()
- case yaml_STREAM_END_EVENT:
- // Happens when attempting to decode an empty buffer.
- return nil
- default:
- panic("attempted to parse unknown event: " + p.event.typ.String())
- }
-}
-
-func (p *parser) node(kind int) *node {
- return &node{
- kind: kind,
- line: p.event.start_mark.line,
- column: p.event.start_mark.column,
- }
-}
-
-func (p *parser) document() *node {
- n := p.node(documentNode)
- n.anchors = make(map[string]*node)
- p.doc = n
- p.expect(yaml_DOCUMENT_START_EVENT)
- n.children = append(n.children, p.parse())
- p.expect(yaml_DOCUMENT_END_EVENT)
- return n
-}
-
-func (p *parser) alias() *node {
- n := p.node(aliasNode)
- n.value = string(p.event.anchor)
- n.alias = p.doc.anchors[n.value]
- if n.alias == nil {
- failf("unknown anchor '%s' referenced", n.value)
- }
- p.expect(yaml_ALIAS_EVENT)
- return n
-}
-
-func (p *parser) scalar() *node {
- n := p.node(scalarNode)
- n.value = string(p.event.value)
- n.tag = string(p.event.tag)
- n.implicit = p.event.implicit
- p.anchor(n, p.event.anchor)
- p.expect(yaml_SCALAR_EVENT)
- return n
-}
-
-func (p *parser) sequence() *node {
- n := p.node(sequenceNode)
- p.anchor(n, p.event.anchor)
- p.expect(yaml_SEQUENCE_START_EVENT)
- for p.peek() != yaml_SEQUENCE_END_EVENT {
- n.children = append(n.children, p.parse())
- }
- p.expect(yaml_SEQUENCE_END_EVENT)
- return n
-}
-
-func (p *parser) mapping() *node {
- n := p.node(mappingNode)
- p.anchor(n, p.event.anchor)
- p.expect(yaml_MAPPING_START_EVENT)
- for p.peek() != yaml_MAPPING_END_EVENT {
- n.children = append(n.children, p.parse(), p.parse())
- }
- p.expect(yaml_MAPPING_END_EVENT)
- return n
-}
-
-// ----------------------------------------------------------------------------
-// Decoder, unmarshals a node into a provided value.
-
-type decoder struct {
- doc *node
- aliases map[*node]bool
- mapType reflect.Type
- terrors []string
- strict bool
-}
-
-var (
- mapItemType = reflect.TypeOf(MapItem{})
- durationType = reflect.TypeOf(time.Duration(0))
- defaultMapType = reflect.TypeOf(map[interface{}]interface{}{})
- ifaceType = defaultMapType.Elem()
- timeType = reflect.TypeOf(time.Time{})
- ptrTimeType = reflect.TypeOf(&time.Time{})
-)
-
-func newDecoder(strict bool) *decoder {
- d := &decoder{mapType: defaultMapType, strict: strict}
- d.aliases = make(map[*node]bool)
- return d
-}
-
-func (d *decoder) terror(n *node, tag string, out reflect.Value) {
- if n.tag != "" {
- tag = n.tag
- }
- value := n.value
- if tag != yaml_SEQ_TAG && tag != yaml_MAP_TAG {
- if len(value) > 10 {
- value = " `" + value[:7] + "...`"
- } else {
- value = " `" + value + "`"
- }
- }
- d.terrors = append(d.terrors, fmt.Sprintf("line %d: cannot unmarshal %s%s into %s", n.line+1, shortTag(tag), value, out.Type()))
-}
-
-func (d *decoder) callUnmarshaler(n *node, u Unmarshaler) (good bool) {
- terrlen := len(d.terrors)
- err := u.UnmarshalYAML(func(v interface{}) (err error) {
- defer handleErr(&err)
- d.unmarshal(n, reflect.ValueOf(v))
- if len(d.terrors) > terrlen {
- issues := d.terrors[terrlen:]
- d.terrors = d.terrors[:terrlen]
- return &TypeError{issues}
- }
- return nil
- })
- if e, ok := err.(*TypeError); ok {
- d.terrors = append(d.terrors, e.Errors...)
- return false
- }
- if err != nil {
- fail(err)
- }
- return true
-}
-
-// d.prepare initializes and dereferences pointers and calls UnmarshalYAML
-// if a value is found to implement it.
-// It returns the initialized and dereferenced out value, whether
-// unmarshalling was already done by UnmarshalYAML, and if so whether
-// its types unmarshalled appropriately.
-//
-// If n holds a null value, prepare returns before doing anything.
-func (d *decoder) prepare(n *node, out reflect.Value) (newout reflect.Value, unmarshaled, good bool) {
- if n.tag == yaml_NULL_TAG || n.kind == scalarNode && n.tag == "" && (n.value == "null" || n.value == "~" || n.value == "" && n.implicit) {
- return out, false, false
- }
- again := true
- for again {
- again = false
- if out.Kind() == reflect.Ptr {
- if out.IsNil() {
- out.Set(reflect.New(out.Type().Elem()))
- }
- out = out.Elem()
- again = true
- }
- if out.CanAddr() {
- if u, ok := out.Addr().Interface().(Unmarshaler); ok {
- good = d.callUnmarshaler(n, u)
- return out, true, good
- }
- }
- }
- return out, false, false
-}
-
-func (d *decoder) unmarshal(n *node, out reflect.Value) (good bool) {
- switch n.kind {
- case documentNode:
- return d.document(n, out)
- case aliasNode:
- return d.alias(n, out)
- }
- out, unmarshaled, good := d.prepare(n, out)
- if unmarshaled {
- return good
- }
- switch n.kind {
- case scalarNode:
- good = d.scalar(n, out)
- case mappingNode:
- good = d.mapping(n, out)
- case sequenceNode:
- good = d.sequence(n, out)
- default:
- panic("internal error: unknown node kind: " + strconv.Itoa(n.kind))
- }
- return good
-}
-
-func (d *decoder) document(n *node, out reflect.Value) (good bool) {
- if len(n.children) == 1 {
- d.doc = n
- d.unmarshal(n.children[0], out)
- return true
- }
- return false
-}
-
-func (d *decoder) alias(n *node, out reflect.Value) (good bool) {
- if d.aliases[n] {
- // TODO this could actually be allowed in some circumstances.
- failf("anchor '%s' value contains itself", n.value)
- }
- d.aliases[n] = true
- good = d.unmarshal(n.alias, out)
- delete(d.aliases, n)
- return good
-}
-
-var zeroValue reflect.Value
-
-func resetMap(out reflect.Value) {
- for _, k := range out.MapKeys() {
- out.SetMapIndex(k, zeroValue)
- }
-}
-
-func (d *decoder) scalar(n *node, out reflect.Value) bool {
- var tag string
- var resolved interface{}
- if n.tag == "" && !n.implicit {
- tag = yaml_STR_TAG
- resolved = n.value
- } else {
- tag, resolved = resolve(n.tag, n.value)
- if tag == yaml_BINARY_TAG {
- data, err := base64.StdEncoding.DecodeString(resolved.(string))
- if err != nil {
- failf("!!binary value contains invalid base64 data")
- }
- resolved = string(data)
- }
- }
- if resolved == nil {
- if out.Kind() == reflect.Map && !out.CanAddr() {
- resetMap(out)
- } else {
- out.Set(reflect.Zero(out.Type()))
- }
- return true
- }
- if resolvedv := reflect.ValueOf(resolved); out.Type() == resolvedv.Type() {
- // We've resolved to exactly the type we want, so use that.
- out.Set(resolvedv)
- return true
- }
- // Perhaps we can use the value as a TextUnmarshaler to
- // set its value.
- if out.CanAddr() {
- u, ok := out.Addr().Interface().(encoding.TextUnmarshaler)
- if ok {
- var text []byte
- if tag == yaml_BINARY_TAG {
- text = []byte(resolved.(string))
- } else {
- // We let any value be unmarshaled into TextUnmarshaler.
- // That might be more lax than we'd like, but the
- // TextUnmarshaler itself should bowl out any dubious values.
- text = []byte(n.value)
- }
- err := u.UnmarshalText(text)
- if err != nil {
- fail(err)
- }
- return true
- }
- }
- switch out.Kind() {
- case reflect.String:
- if tag == yaml_BINARY_TAG {
- out.SetString(resolved.(string))
- return true
- }
- if resolved != nil {
- out.SetString(n.value)
- return true
- }
- case reflect.Interface:
- if resolved == nil {
- out.Set(reflect.Zero(out.Type()))
- } else if tag == yaml_TIMESTAMP_TAG {
- // It looks like a timestamp but for backward compatibility
- // reasons we set it as a string, so that code that unmarshals
- // timestamp-like values into interface{} will continue to
- // see a string and not a time.Time.
- // TODO(v3) Drop this.
- out.Set(reflect.ValueOf(n.value))
- } else {
- out.Set(reflect.ValueOf(resolved))
- }
- return true
- case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
- switch resolved := resolved.(type) {
- case int:
- if !out.OverflowInt(int64(resolved)) {
- out.SetInt(int64(resolved))
- return true
- }
- case int64:
- if !out.OverflowInt(resolved) {
- out.SetInt(resolved)
- return true
- }
- case uint64:
- if resolved <= math.MaxInt64 && !out.OverflowInt(int64(resolved)) {
- out.SetInt(int64(resolved))
- return true
- }
- case float64:
- if resolved <= math.MaxInt64 && !out.OverflowInt(int64(resolved)) {
- out.SetInt(int64(resolved))
- return true
- }
- case string:
- if out.Type() == durationType {
- d, err := time.ParseDuration(resolved)
- if err == nil {
- out.SetInt(int64(d))
- return true
- }
- }
- }
- case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
- switch resolved := resolved.(type) {
- case int:
- if resolved >= 0 && !out.OverflowUint(uint64(resolved)) {
- out.SetUint(uint64(resolved))
- return true
- }
- case int64:
- if resolved >= 0 && !out.OverflowUint(uint64(resolved)) {
- out.SetUint(uint64(resolved))
- return true
- }
- case uint64:
- if !out.OverflowUint(uint64(resolved)) {
- out.SetUint(uint64(resolved))
- return true
- }
- case float64:
- if resolved <= math.MaxUint64 && !out.OverflowUint(uint64(resolved)) {
- out.SetUint(uint64(resolved))
- return true
- }
- }
- case reflect.Bool:
- switch resolved := resolved.(type) {
- case bool:
- out.SetBool(resolved)
- return true
- }
- case reflect.Float32, reflect.Float64:
- switch resolved := resolved.(type) {
- case int:
- out.SetFloat(float64(resolved))
- return true
- case int64:
- out.SetFloat(float64(resolved))
- return true
- case uint64:
- out.SetFloat(float64(resolved))
- return true
- case float64:
- out.SetFloat(resolved)
- return true
- }
- case reflect.Struct:
- if resolvedv := reflect.ValueOf(resolved); out.Type() == resolvedv.Type() {
- out.Set(resolvedv)
- return true
- }
- case reflect.Ptr:
- if out.Type().Elem() == reflect.TypeOf(resolved) {
- // TODO DOes this make sense? When is out a Ptr except when decoding a nil value?
- elem := reflect.New(out.Type().Elem())
- elem.Elem().Set(reflect.ValueOf(resolved))
- out.Set(elem)
- return true
- }
- }
- d.terror(n, tag, out)
- return false
-}
-
-func settableValueOf(i interface{}) reflect.Value {
- v := reflect.ValueOf(i)
- sv := reflect.New(v.Type()).Elem()
- sv.Set(v)
- return sv
-}
-
-func (d *decoder) sequence(n *node, out reflect.Value) (good bool) {
- l := len(n.children)
-
- var iface reflect.Value
- switch out.Kind() {
- case reflect.Slice:
- out.Set(reflect.MakeSlice(out.Type(), l, l))
- case reflect.Array:
- if l != out.Len() {
- failf("invalid array: want %d elements but got %d", out.Len(), l)
- }
- case reflect.Interface:
- // No type hints. Will have to use a generic sequence.
- iface = out
- out = settableValueOf(make([]interface{}, l))
- default:
- d.terror(n, yaml_SEQ_TAG, out)
- return false
- }
- et := out.Type().Elem()
-
- j := 0
- for i := 0; i < l; i++ {
- e := reflect.New(et).Elem()
- if ok := d.unmarshal(n.children[i], e); ok {
- out.Index(j).Set(e)
- j++
- }
- }
- if out.Kind() != reflect.Array {
- out.Set(out.Slice(0, j))
- }
- if iface.IsValid() {
- iface.Set(out)
- }
- return true
-}
-
-func (d *decoder) mapping(n *node, out reflect.Value) (good bool) {
- switch out.Kind() {
- case reflect.Struct:
- return d.mappingStruct(n, out)
- case reflect.Slice:
- return d.mappingSlice(n, out)
- case reflect.Map:
- // okay
- case reflect.Interface:
- if d.mapType.Kind() == reflect.Map {
- iface := out
- out = reflect.MakeMap(d.mapType)
- iface.Set(out)
- } else {
- slicev := reflect.New(d.mapType).Elem()
- if !d.mappingSlice(n, slicev) {
- return false
- }
- out.Set(slicev)
- return true
- }
- default:
- d.terror(n, yaml_MAP_TAG, out)
- return false
- }
- outt := out.Type()
- kt := outt.Key()
- et := outt.Elem()
-
- mapType := d.mapType
- if outt.Key() == ifaceType && outt.Elem() == ifaceType {
- d.mapType = outt
- }
-
- if out.IsNil() {
- out.Set(reflect.MakeMap(outt))
- }
- l := len(n.children)
- for i := 0; i < l; i += 2 {
- if isMerge(n.children[i]) {
- d.merge(n.children[i+1], out)
- continue
- }
- k := reflect.New(kt).Elem()
- if d.unmarshal(n.children[i], k) {
- kkind := k.Kind()
- if kkind == reflect.Interface {
- kkind = k.Elem().Kind()
- }
- if kkind == reflect.Map || kkind == reflect.Slice {
- failf("invalid map key: %#v", k.Interface())
- }
- e := reflect.New(et).Elem()
- if d.unmarshal(n.children[i+1], e) {
- d.setMapIndex(n.children[i+1], out, k, e)
- }
- }
- }
- d.mapType = mapType
- return true
-}
-
-func (d *decoder) setMapIndex(n *node, out, k, v reflect.Value) {
- if d.strict && out.MapIndex(k) != zeroValue {
- d.terrors = append(d.terrors, fmt.Sprintf("line %d: key %#v already set in map", n.line+1, k.Interface()))
- return
- }
- out.SetMapIndex(k, v)
-}
-
-func (d *decoder) mappingSlice(n *node, out reflect.Value) (good bool) {
- outt := out.Type()
- if outt.Elem() != mapItemType {
- d.terror(n, yaml_MAP_TAG, out)
- return false
- }
-
- mapType := d.mapType
- d.mapType = outt
-
- var slice []MapItem
- var l = len(n.children)
- for i := 0; i < l; i += 2 {
- if isMerge(n.children[i]) {
- d.merge(n.children[i+1], out)
- continue
- }
- item := MapItem{}
- k := reflect.ValueOf(&item.Key).Elem()
- if d.unmarshal(n.children[i], k) {
- v := reflect.ValueOf(&item.Value).Elem()
- if d.unmarshal(n.children[i+1], v) {
- slice = append(slice, item)
- }
- }
- }
- out.Set(reflect.ValueOf(slice))
- d.mapType = mapType
- return true
-}
-
-func (d *decoder) mappingStruct(n *node, out reflect.Value) (good bool) {
- sinfo, err := getStructInfo(out.Type())
- if err != nil {
- panic(err)
- }
- name := settableValueOf("")
- l := len(n.children)
-
- var inlineMap reflect.Value
- var elemType reflect.Type
- if sinfo.InlineMap != -1 {
- inlineMap = out.Field(sinfo.InlineMap)
- inlineMap.Set(reflect.New(inlineMap.Type()).Elem())
- elemType = inlineMap.Type().Elem()
- }
-
- var doneFields []bool
- if d.strict {
- doneFields = make([]bool, len(sinfo.FieldsList))
- }
- for i := 0; i < l; i += 2 {
- ni := n.children[i]
- if isMerge(ni) {
- d.merge(n.children[i+1], out)
- continue
- }
- if !d.unmarshal(ni, name) {
- continue
- }
- if info, ok := sinfo.FieldsMap[name.String()]; ok {
- if d.strict {
- if doneFields[info.Id] {
- d.terrors = append(d.terrors, fmt.Sprintf("line %d: field %s already set in type %s", ni.line+1, name.String(), out.Type()))
- continue
- }
- doneFields[info.Id] = true
- }
- var field reflect.Value
- if info.Inline == nil {
- field = out.Field(info.Num)
- } else {
- field = out.FieldByIndex(info.Inline)
- }
- d.unmarshal(n.children[i+1], field)
- } else if sinfo.InlineMap != -1 {
- if inlineMap.IsNil() {
- inlineMap.Set(reflect.MakeMap(inlineMap.Type()))
- }
- value := reflect.New(elemType).Elem()
- d.unmarshal(n.children[i+1], value)
- d.setMapIndex(n.children[i+1], inlineMap, name, value)
- } else if d.strict {
- d.terrors = append(d.terrors, fmt.Sprintf("line %d: field %s not found in type %s", ni.line+1, name.String(), out.Type()))
- }
- }
- return true
-}
-
-func failWantMap() {
- failf("map merge requires map or sequence of maps as the value")
-}
-
-func (d *decoder) merge(n *node, out reflect.Value) {
- switch n.kind {
- case mappingNode:
- d.unmarshal(n, out)
- case aliasNode:
- an, ok := d.doc.anchors[n.value]
- if ok && an.kind != mappingNode {
- failWantMap()
- }
- d.unmarshal(n, out)
- case sequenceNode:
- // Step backwards as earlier nodes take precedence.
- for i := len(n.children) - 1; i >= 0; i-- {
- ni := n.children[i]
- if ni.kind == aliasNode {
- an, ok := d.doc.anchors[ni.value]
- if ok && an.kind != mappingNode {
- failWantMap()
- }
- } else if ni.kind != mappingNode {
- failWantMap()
- }
- d.unmarshal(ni, out)
- }
- default:
- failWantMap()
- }
-}
-
-func isMerge(n *node) bool {
- return n.kind == scalarNode && n.value == "<<" && (n.implicit == true || n.tag == yaml_MERGE_TAG)
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 03:52:42 +0000