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path: root/vendor/gopkg.in/yaml.v2/decode.go
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Diffstat (limited to 'vendor/gopkg.in/yaml.v2/decode.go')
-rw-r--r--vendor/gopkg.in/yaml.v2/decode.go245
1 files changed, 169 insertions, 76 deletions
diff --git a/vendor/gopkg.in/yaml.v2/decode.go b/vendor/gopkg.in/yaml.v2/decode.go
index 052ecfcd1..e4e56e28e 100644
--- a/vendor/gopkg.in/yaml.v2/decode.go
+++ b/vendor/gopkg.in/yaml.v2/decode.go
@@ -4,6 +4,7 @@ import (
"encoding"
"encoding/base64"
"fmt"
+ "io"
"math"
"reflect"
"strconv"
@@ -22,19 +23,22 @@ type node struct {
kind int
line, column int
tag string
- value string
- implicit bool
- children []*node
- anchors map[string]*node
+ // 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
+ parser yaml_parser_t
+ event yaml_event_t
+ doc *node
+ doneInit bool
}
func newParser(b []byte) *parser {
@@ -42,21 +46,30 @@ func newParser(b []byte) *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
+}
- p.skip()
- if p.event.typ != yaml_STREAM_START_EVENT {
- panic("expected stream start event, got " + strconv.Itoa(int(p.event.typ)))
+func newParserFromReader(r io.Reader) *parser {
+ p := parser{}
+ if !yaml_parser_initialize(&p.parser) {
+ panic("failed to initialize YAML emitter")
}
- p.skip()
+ 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)
@@ -64,16 +77,35 @@ func (p *parser) destroy() {
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?")
+// 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()
}
- yaml_event_delete(&p.event)
+ }
+ 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() {
@@ -81,6 +113,10 @@ func (p *parser) fail() {
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
}
@@ -103,7 +139,8 @@ func (p *parser) anchor(n *node, anchor []byte) {
}
func (p *parser) parse() *node {
- switch p.event.typ {
+ p.init()
+ switch p.peek() {
case yaml_SCALAR_EVENT:
return p.scalar()
case yaml_ALIAS_EVENT:
@@ -118,7 +155,7 @@ func (p *parser) parse() *node {
// Happens when attempting to decode an empty buffer.
return nil
default:
- panic("attempted to parse unknown event: " + strconv.Itoa(int(p.event.typ)))
+ panic("attempted to parse unknown event: " + p.event.typ.String())
}
}
@@ -134,19 +171,20 @@ func (p *parser) document() *node {
n := p.node(documentNode)
n.anchors = make(map[string]*node)
p.doc = n
- p.skip()
+ p.expect(yaml_DOCUMENT_START_EVENT)
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()
+ p.expect(yaml_DOCUMENT_END_EVENT)
return n
}
func (p *parser) alias() *node {
n := p.node(aliasNode)
n.value = string(p.event.anchor)
- p.skip()
+ 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
}
@@ -156,29 +194,29 @@ func (p *parser) scalar() *node {
n.tag = string(p.event.tag)
n.implicit = p.event.implicit
p.anchor(n, p.event.anchor)
- p.skip()
+ p.expect(yaml_SCALAR_EVENT)
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 {
+ p.expect(yaml_SEQUENCE_START_EVENT)
+ for p.peek() != yaml_SEQUENCE_END_EVENT {
n.children = append(n.children, p.parse())
}
- p.skip()
+ p.expect(yaml_SEQUENCE_END_EVENT)
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 {
+ p.expect(yaml_MAPPING_START_EVENT)
+ for p.peek() != yaml_MAPPING_END_EVENT {
n.children = append(n.children, p.parse(), p.parse())
}
- p.skip()
+ p.expect(yaml_MAPPING_END_EVENT)
return n
}
@@ -187,9 +225,10 @@ func (p *parser) mapping() *node {
type decoder struct {
doc *node
- aliases map[string]bool
+ aliases map[*node]bool
mapType reflect.Type
terrors []string
+ strict bool
}
var (
@@ -197,11 +236,13 @@ var (
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() *decoder {
- d := &decoder{mapType: defaultMapType}
- d.aliases = make(map[string]bool)
+func newDecoder(strict bool) *decoder {
+ d := &decoder{mapType: defaultMapType, strict: strict}
+ d.aliases = make(map[*node]bool)
return d
}
@@ -250,7 +291,7 @@ func (d *decoder) callUnmarshaler(n *node, u Unmarshaler) (good bool) {
//
// 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.implicit) {
+ 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
@@ -307,16 +348,13 @@ func (d *decoder) document(n *node, out reflect.Value) (good bool) {
}
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] {
+ if d.aliases[n] {
+ // TODO this could actually be allowed in some circumstances.
failf("anchor '%s' value contains itself", n.value)
}
- d.aliases[n.value] = true
- good = d.unmarshal(an, out)
- delete(d.aliases, n.value)
+ d.aliases[n] = true
+ good = d.unmarshal(n.alias, out)
+ delete(d.aliases, n)
return good
}
@@ -328,7 +366,7 @@ func resetMap(out reflect.Value) {
}
}
-func (d *decoder) scalar(n *node, out reflect.Value) (good bool) {
+func (d *decoder) scalar(n *node, out reflect.Value) bool {
var tag string
var resolved interface{}
if n.tag == "" && !n.implicit {
@@ -352,9 +390,26 @@ func (d *decoder) scalar(n *node, out reflect.Value) (good bool) {
}
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 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)
}
@@ -365,46 +420,54 @@ func (d *decoder) scalar(n *node, out reflect.Value) (good bool) {
case reflect.String:
if tag == yaml_BINARY_TAG {
out.SetString(resolved.(string))
- good = true
- } else if resolved != nil {
+ return true
+ }
+ if resolved != nil {
out.SetString(n.value)
- good = true
+ 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))
}
- good = true
+ 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))
- good = true
+ return true
}
case int64:
if !out.OverflowInt(resolved) {
out.SetInt(resolved)
- good = true
+ return true
}
case uint64:
if resolved <= math.MaxInt64 && !out.OverflowInt(int64(resolved)) {
out.SetInt(int64(resolved))
- good = true
+ return true
}
case float64:
if resolved <= math.MaxInt64 && !out.OverflowInt(int64(resolved)) {
out.SetInt(int64(resolved))
- good = true
+ return true
}
case string:
if out.Type() == durationType {
d, err := time.ParseDuration(resolved)
if err == nil {
out.SetInt(int64(d))
- good = true
+ return true
}
}
}
@@ -413,44 +476,49 @@ func (d *decoder) scalar(n *node, out reflect.Value) (good bool) {
case int:
if resolved >= 0 && !out.OverflowUint(uint64(resolved)) {
out.SetUint(uint64(resolved))
- good = true
+ return true
}
case int64:
if resolved >= 0 && !out.OverflowUint(uint64(resolved)) {
out.SetUint(uint64(resolved))
- good = true
+ return true
}
case uint64:
if !out.OverflowUint(uint64(resolved)) {
out.SetUint(uint64(resolved))
- good = true
+ return true
}
case float64:
if resolved <= math.MaxUint64 && !out.OverflowUint(uint64(resolved)) {
out.SetUint(uint64(resolved))
- good = true
+ return true
}
}
case reflect.Bool:
switch resolved := resolved.(type) {
case bool:
out.SetBool(resolved)
- good = true
+ return true
}
case reflect.Float32, reflect.Float64:
switch resolved := resolved.(type) {
case int:
out.SetFloat(float64(resolved))
- good = true
+ return true
case int64:
out.SetFloat(float64(resolved))
- good = true
+ return true
case uint64:
out.SetFloat(float64(resolved))
- good = true
+ return true
case float64:
out.SetFloat(resolved)
- good = true
+ 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) {
@@ -458,13 +526,11 @@ func (d *decoder) scalar(n *node, out reflect.Value) (good bool) {
elem := reflect.New(out.Type().Elem())
elem.Elem().Set(reflect.ValueOf(resolved))
out.Set(elem)
- good = true
+ return true
}
}
- if !good {
- d.terror(n, tag, out)
- }
- return good
+ d.terror(n, tag, out)
+ return false
}
func settableValueOf(i interface{}) reflect.Value {
@@ -481,6 +547,10 @@ func (d *decoder) sequence(n *node, out reflect.Value) (good bool) {
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
@@ -499,7 +569,9 @@ func (d *decoder) sequence(n *node, out reflect.Value) (good bool) {
j++
}
}
- out.Set(out.Slice(0, j))
+ if out.Kind() != reflect.Array {
+ out.Set(out.Slice(0, j))
+ }
if iface.IsValid() {
iface.Set(out)
}
@@ -560,7 +632,7 @@ func (d *decoder) mapping(n *node, out reflect.Value) (good bool) {
}
e := reflect.New(et).Elem()
if d.unmarshal(n.children[i+1], e) {
- out.SetMapIndex(k, e)
+ d.setMapIndex(n.children[i+1], out, k, e)
}
}
}
@@ -568,6 +640,14 @@ func (d *decoder) mapping(n *node, out reflect.Value) (good bool) {
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 {
@@ -615,6 +695,10 @@ func (d *decoder) mappingStruct(n *node, out reflect.Value) (good bool) {
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) {
@@ -625,6 +709,13 @@ func (d *decoder) mappingStruct(n *node, out reflect.Value) (good bool) {
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)
@@ -638,7 +729,9 @@ func (d *decoder) mappingStruct(n *node, out reflect.Value) (good bool) {
}
value := reflect.New(elemType).Elem()
d.unmarshal(n.children[i+1], value)
- inlineMap.SetMapIndex(name, 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
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-13 23:26:25 +0000