diff options
author | 2017-09-04 15:00:54 +0800 | |
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committer | 2017-09-04 15:06:21 +0800 | |
commit | 43dac0bc4302fed79eaeb661723ca584a9c0496a (patch) | |
tree | a78f60300d73f0a69ed12e946d3fe4580455d8ba /kube2msb/src/vendor/gopkg.in/yaml.v2/decode.go | |
parent | a7837a0ac51704003c6aacba2dacb8e64f681622 (diff) |
restructure the source directory
Issue-ID: OOM-61
Change-Id: Ib6f633d517ad197bfdbca59b374cdad2f1ed897e
Signed-off-by: HuabingZhao <zhao.huabing@zte.com.cn>
Diffstat (limited to 'kube2msb/src/vendor/gopkg.in/yaml.v2/decode.go')
-rw-r--r-- | kube2msb/src/vendor/gopkg.in/yaml.v2/decode.go | 683 |
1 files changed, 0 insertions, 683 deletions
diff --git a/kube2msb/src/vendor/gopkg.in/yaml.v2/decode.go b/kube2msb/src/vendor/gopkg.in/yaml.v2/decode.go deleted file mode 100644 index 085cddc..0000000 --- a/kube2msb/src/vendor/gopkg.in/yaml.v2/decode.go +++ /dev/null @@ -1,683 +0,0 @@ -package yaml - -import ( - "encoding" - "encoding/base64" - "fmt" - "math" - "reflect" - "strconv" - "time" -) - -const ( - documentNode = 1 << iota - mappingNode - sequenceNode - scalarNode - aliasNode -) - -type node struct { - kind int - line, column int - tag string - 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 -} - -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) - - p.skip() - if p.event.typ != yaml_STREAM_START_EVENT { - panic("expected stream start event, got " + strconv.Itoa(int(p.event.typ))) - } - p.skip() - return &p -} - -func (p *parser) destroy() { - if p.event.typ != yaml_NO_EVENT { - yaml_event_delete(&p.event) - } - yaml_parser_delete(&p.parser) -} - -func (p *parser) skip() { - if p.event.typ != yaml_NO_EVENT { - if p.event.typ == yaml_STREAM_END_EVENT { - failf("attempted to go past the end of stream; corrupted value?") - } - yaml_event_delete(&p.event) - } - if !yaml_parser_parse(&p.parser, &p.event) { - p.fail() - } -} - -func (p *parser) fail() { - var where string - var line int - if p.parser.problem_mark.line != 0 { - line = p.parser.problem_mark.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 { - switch p.event.typ { - 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: " + strconv.Itoa(int(p.event.typ))) - } - panic("unreachable") -} - -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.skip() - n.children = append(n.children, p.parse()) - if p.event.typ != yaml_DOCUMENT_END_EVENT { - panic("expected end of document event but got " + strconv.Itoa(int(p.event.typ))) - } - p.skip() - return n -} - -func (p *parser) alias() *node { - n := p.node(aliasNode) - n.value = string(p.event.anchor) - p.skip() - 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.skip() - return n -} - -func (p *parser) sequence() *node { - n := p.node(sequenceNode) - p.anchor(n, p.event.anchor) - p.skip() - for p.event.typ != yaml_SEQUENCE_END_EVENT { - n.children = append(n.children, p.parse()) - } - p.skip() - return n -} - -func (p *parser) mapping() *node { - n := p.node(mappingNode) - p.anchor(n, p.event.anchor) - p.skip() - for p.event.typ != yaml_MAPPING_END_EVENT { - n.children = append(n.children, p.parse(), p.parse()) - } - p.skip() - return n -} - -// ---------------------------------------------------------------------------- -// Decoder, unmarshals a node into a provided value. - -type decoder struct { - doc *node - aliases map[string]bool - mapType reflect.Type - terrors []string -} - -var ( - mapItemType = reflect.TypeOf(MapItem{}) - durationType = reflect.TypeOf(time.Duration(0)) - defaultMapType = reflect.TypeOf(map[interface{}]interface{}{}) - ifaceType = defaultMapType.Elem() -) - -func newDecoder() *decoder { - d := &decoder{mapType: defaultMapType} - d.aliases = make(map[string]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 == "") { - 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) { - an, ok := d.doc.anchors[n.value] - if !ok { - failf("unknown anchor '%s' referenced", n.value) - } - if d.aliases[n.value] { - failf("anchor '%s' value contains itself", n.value) - } - d.aliases[n.value] = true - good = d.unmarshal(an, out) - delete(d.aliases, n.value) - 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) (good 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 s, ok := resolved.(string); ok && out.CanAddr() { - if u, ok := out.Addr().Interface().(encoding.TextUnmarshaler); ok { - err := u.UnmarshalText([]byte(s)) - if err != nil { - fail(err) - } - return true - } - } - switch out.Kind() { - case reflect.String: - if tag == yaml_BINARY_TAG { - out.SetString(resolved.(string)) - good = true - } else if resolved != nil { - out.SetString(n.value) - good = true - } - case reflect.Interface: - if resolved == nil { - out.Set(reflect.Zero(out.Type())) - } else { - out.Set(reflect.ValueOf(resolved)) - } - good = 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)) - good = true - } - case int64: - if !out.OverflowInt(resolved) { - out.SetInt(resolved) - good = true - } - case uint64: - if resolved <= math.MaxInt64 && !out.OverflowInt(int64(resolved)) { - out.SetInt(int64(resolved)) - good = true - } - case float64: - if resolved <= math.MaxInt64 && !out.OverflowInt(int64(resolved)) { - out.SetInt(int64(resolved)) - good = true - } - case string: - if out.Type() == durationType { - d, err := time.ParseDuration(resolved) - if err == nil { - out.SetInt(int64(d)) - good = 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)) - good = true - } - case int64: - if resolved >= 0 && !out.OverflowUint(uint64(resolved)) { - out.SetUint(uint64(resolved)) - good = true - } - case uint64: - if !out.OverflowUint(uint64(resolved)) { - out.SetUint(uint64(resolved)) - good = true - } - case float64: - if resolved <= math.MaxUint64 && !out.OverflowUint(uint64(resolved)) { - out.SetUint(uint64(resolved)) - good = true - } - } - case reflect.Bool: - switch resolved := resolved.(type) { - case bool: - out.SetBool(resolved) - good = true - } - case reflect.Float32, reflect.Float64: - switch resolved := resolved.(type) { - case int: - out.SetFloat(float64(resolved)) - good = true - case int64: - out.SetFloat(float64(resolved)) - good = true - case uint64: - out.SetFloat(float64(resolved)) - good = true - case float64: - out.SetFloat(resolved) - good = 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) - good = true - } - } - if !good { - d.terror(n, tag, out) - } - return good -} - -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.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++ - } - } - 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) { - out.SetMapIndex(k, e) - } - } - } - d.mapType = mapType - return true -} - -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() - } - - 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 { - 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) - inlineMap.SetMapIndex(name, value) - } - } - 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) -} |