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path: root/src/pkg/encoding/xml/marshal.go
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Diffstat (limited to 'src/pkg/encoding/xml/marshal.go')
-rw-r--r--src/pkg/encoding/xml/marshal.go938
1 files changed, 0 insertions, 938 deletions
diff --git a/src/pkg/encoding/xml/marshal.go b/src/pkg/encoding/xml/marshal.go
deleted file mode 100644
index 8c6342013..000000000
--- a/src/pkg/encoding/xml/marshal.go
+++ /dev/null
@@ -1,938 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package xml
-
-import (
- "bufio"
- "bytes"
- "encoding"
- "fmt"
- "io"
- "reflect"
- "strconv"
- "strings"
-)
-
-const (
- // A generic XML header suitable for use with the output of Marshal.
- // This is not automatically added to any output of this package,
- // it is provided as a convenience.
- Header = `<?xml version="1.0" encoding="UTF-8"?>` + "\n"
-)
-
-// Marshal returns the XML encoding of v.
-//
-// Marshal handles an array or slice by marshalling each of the elements.
-// Marshal handles a pointer by marshalling the value it points at or, if the
-// pointer is nil, by writing nothing. Marshal handles an interface value by
-// marshalling the value it contains or, if the interface value is nil, by
-// writing nothing. Marshal handles all other data by writing one or more XML
-// elements containing the data.
-//
-// The name for the XML elements is taken from, in order of preference:
-// - the tag on the XMLName field, if the data is a struct
-// - the value of the XMLName field of type xml.Name
-// - the tag of the struct field used to obtain the data
-// - the name of the struct field used to obtain the data
-// - the name of the marshalled type
-//
-// The XML element for a struct contains marshalled elements for each of the
-// exported fields of the struct, with these exceptions:
-// - the XMLName field, described above, is omitted.
-// - a field with tag "-" is omitted.
-// - a field with tag "name,attr" becomes an attribute with
-// the given name in the XML element.
-// - a field with tag ",attr" becomes an attribute with the
-// field name in the XML element.
-// - a field with tag ",chardata" is written as character data,
-// not as an XML element.
-// - a field with tag ",innerxml" is written verbatim, not subject
-// to the usual marshalling procedure.
-// - a field with tag ",comment" is written as an XML comment, not
-// subject to the usual marshalling procedure. It must not contain
-// the "--" string within it.
-// - a field with a tag including the "omitempty" option is omitted
-// if the field value is empty. The empty values are false, 0, any
-// nil pointer or interface value, and any array, slice, map, or
-// string of length zero.
-// - an anonymous struct field is handled as if the fields of its
-// value were part of the outer struct.
-//
-// If a field uses a tag "a>b>c", then the element c will be nested inside
-// parent elements a and b. Fields that appear next to each other that name
-// the same parent will be enclosed in one XML element.
-//
-// See MarshalIndent for an example.
-//
-// Marshal will return an error if asked to marshal a channel, function, or map.
-func Marshal(v interface{}) ([]byte, error) {
- var b bytes.Buffer
- if err := NewEncoder(&b).Encode(v); err != nil {
- return nil, err
- }
- return b.Bytes(), nil
-}
-
-// Marshaler is the interface implemented by objects that can marshal
-// themselves into valid XML elements.
-//
-// MarshalXML encodes the receiver as zero or more XML elements.
-// By convention, arrays or slices are typically encoded as a sequence
-// of elements, one per entry.
-// Using start as the element tag is not required, but doing so
-// will enable Unmarshal to match the XML elements to the correct
-// struct field.
-// One common implementation strategy is to construct a separate
-// value with a layout corresponding to the desired XML and then
-// to encode it using e.EncodeElement.
-// Another common strategy is to use repeated calls to e.EncodeToken
-// to generate the XML output one token at a time.
-// The sequence of encoded tokens must make up zero or more valid
-// XML elements.
-type Marshaler interface {
- MarshalXML(e *Encoder, start StartElement) error
-}
-
-// MarshalerAttr is the interface implemented by objects that can marshal
-// themselves into valid XML attributes.
-//
-// MarshalXMLAttr returns an XML attribute with the encoded value of the receiver.
-// Using name as the attribute name is not required, but doing so
-// will enable Unmarshal to match the attribute to the correct
-// struct field.
-// If MarshalXMLAttr returns the zero attribute Attr{}, no attribute
-// will be generated in the output.
-// MarshalXMLAttr is used only for struct fields with the
-// "attr" option in the field tag.
-type MarshalerAttr interface {
- MarshalXMLAttr(name Name) (Attr, error)
-}
-
-// MarshalIndent works like Marshal, but each XML element begins on a new
-// indented line that starts with prefix and is followed by one or more
-// copies of indent according to the nesting depth.
-func MarshalIndent(v interface{}, prefix, indent string) ([]byte, error) {
- var b bytes.Buffer
- enc := NewEncoder(&b)
- enc.Indent(prefix, indent)
- if err := enc.Encode(v); err != nil {
- return nil, err
- }
- return b.Bytes(), nil
-}
-
-// An Encoder writes XML data to an output stream.
-type Encoder struct {
- p printer
-}
-
-// NewEncoder returns a new encoder that writes to w.
-func NewEncoder(w io.Writer) *Encoder {
- e := &Encoder{printer{Writer: bufio.NewWriter(w)}}
- e.p.encoder = e
- return e
-}
-
-// Indent sets the encoder to generate XML in which each element
-// begins on a new indented line that starts with prefix and is followed by
-// one or more copies of indent according to the nesting depth.
-func (enc *Encoder) Indent(prefix, indent string) {
- enc.p.prefix = prefix
- enc.p.indent = indent
-}
-
-// Encode writes the XML encoding of v to the stream.
-//
-// See the documentation for Marshal for details about the conversion
-// of Go values to XML.
-//
-// Encode calls Flush before returning.
-func (enc *Encoder) Encode(v interface{}) error {
- err := enc.p.marshalValue(reflect.ValueOf(v), nil, nil)
- if err != nil {
- return err
- }
- return enc.p.Flush()
-}
-
-// EncodeElement writes the XML encoding of v to the stream,
-// using start as the outermost tag in the encoding.
-//
-// See the documentation for Marshal for details about the conversion
-// of Go values to XML.
-//
-// EncodeElement calls Flush before returning.
-func (enc *Encoder) EncodeElement(v interface{}, start StartElement) error {
- err := enc.p.marshalValue(reflect.ValueOf(v), nil, &start)
- if err != nil {
- return err
- }
- return enc.p.Flush()
-}
-
-var (
- endComment = []byte("-->")
- endProcInst = []byte("?>")
- endDirective = []byte(">")
-)
-
-// EncodeToken writes the given XML token to the stream.
-// It returns an error if StartElement and EndElement tokens are not properly matched.
-//
-// EncodeToken does not call Flush, because usually it is part of a larger operation
-// such as Encode or EncodeElement (or a custom Marshaler's MarshalXML invoked
-// during those), and those will call Flush when finished.
-// Callers that create an Encoder and then invoke EncodeToken directly, without
-// using Encode or EncodeElement, need to call Flush when finished to ensure
-// that the XML is written to the underlying writer.
-//
-// EncodeToken allows writing a ProcInst with Target set to "xml" only as the first token
-// in the stream.
-func (enc *Encoder) EncodeToken(t Token) error {
- p := &enc.p
- switch t := t.(type) {
- case StartElement:
- if err := p.writeStart(&t); err != nil {
- return err
- }
- case EndElement:
- if err := p.writeEnd(t.Name); err != nil {
- return err
- }
- case CharData:
- EscapeText(p, t)
- case Comment:
- if bytes.Contains(t, endComment) {
- return fmt.Errorf("xml: EncodeToken of Comment containing --> marker")
- }
- p.WriteString("<!--")
- p.Write(t)
- p.WriteString("-->")
- return p.cachedWriteError()
- case ProcInst:
- // First token to be encoded which is also a ProcInst with target of xml
- // is the xml declaration. The only ProcInst where target of xml is allowed.
- if t.Target == "xml" && p.Buffered() != 0 {
- return fmt.Errorf("xml: EncodeToken of ProcInst xml target only valid for xml declaration, first token encoded")
- }
- if !isNameString(t.Target) {
- return fmt.Errorf("xml: EncodeToken of ProcInst with invalid Target")
- }
- if bytes.Contains(t.Inst, endProcInst) {
- return fmt.Errorf("xml: EncodeToken of ProcInst containing ?> marker")
- }
- p.WriteString("<?")
- p.WriteString(t.Target)
- if len(t.Inst) > 0 {
- p.WriteByte(' ')
- p.Write(t.Inst)
- }
- p.WriteString("?>")
- case Directive:
- if bytes.Contains(t, endDirective) {
- return fmt.Errorf("xml: EncodeToken of Directive containing > marker")
- }
- p.WriteString("<!")
- p.Write(t)
- p.WriteString(">")
- }
- return p.cachedWriteError()
-}
-
-// Flush flushes any buffered XML to the underlying writer.
-// See the EncodeToken documentation for details about when it is necessary.
-func (enc *Encoder) Flush() error {
- return enc.p.Flush()
-}
-
-type printer struct {
- *bufio.Writer
- encoder *Encoder
- seq int
- indent string
- prefix string
- depth int
- indentedIn bool
- putNewline bool
- attrNS map[string]string // map prefix -> name space
- attrPrefix map[string]string // map name space -> prefix
- prefixes []string
- tags []Name
-}
-
-// createAttrPrefix finds the name space prefix attribute to use for the given name space,
-// defining a new prefix if necessary. It returns the prefix.
-func (p *printer) createAttrPrefix(url string) string {
- if prefix := p.attrPrefix[url]; prefix != "" {
- return prefix
- }
-
- // The "http://www.w3.org/XML/1998/namespace" name space is predefined as "xml"
- // and must be referred to that way.
- // (The "http://www.w3.org/2000/xmlns/" name space is also predefined as "xmlns",
- // but users should not be trying to use that one directly - that's our job.)
- if url == xmlURL {
- return "xml"
- }
-
- // Need to define a new name space.
- if p.attrPrefix == nil {
- p.attrPrefix = make(map[string]string)
- p.attrNS = make(map[string]string)
- }
-
- // Pick a name. We try to use the final element of the path
- // but fall back to _.
- prefix := strings.TrimRight(url, "/")
- if i := strings.LastIndex(prefix, "/"); i >= 0 {
- prefix = prefix[i+1:]
- }
- if prefix == "" || !isName([]byte(prefix)) || strings.Contains(prefix, ":") {
- prefix = "_"
- }
- if strings.HasPrefix(prefix, "xml") {
- // xmlanything is reserved.
- prefix = "_" + prefix
- }
- if p.attrNS[prefix] != "" {
- // Name is taken. Find a better one.
- for p.seq++; ; p.seq++ {
- if id := prefix + "_" + strconv.Itoa(p.seq); p.attrNS[id] == "" {
- prefix = id
- break
- }
- }
- }
-
- p.attrPrefix[url] = prefix
- p.attrNS[prefix] = url
-
- p.WriteString(`xmlns:`)
- p.WriteString(prefix)
- p.WriteString(`="`)
- EscapeText(p, []byte(url))
- p.WriteString(`" `)
-
- p.prefixes = append(p.prefixes, prefix)
-
- return prefix
-}
-
-// deleteAttrPrefix removes an attribute name space prefix.
-func (p *printer) deleteAttrPrefix(prefix string) {
- delete(p.attrPrefix, p.attrNS[prefix])
- delete(p.attrNS, prefix)
-}
-
-func (p *printer) markPrefix() {
- p.prefixes = append(p.prefixes, "")
-}
-
-func (p *printer) popPrefix() {
- for len(p.prefixes) > 0 {
- prefix := p.prefixes[len(p.prefixes)-1]
- p.prefixes = p.prefixes[:len(p.prefixes)-1]
- if prefix == "" {
- break
- }
- p.deleteAttrPrefix(prefix)
- }
-}
-
-var (
- marshalerType = reflect.TypeOf((*Marshaler)(nil)).Elem()
- marshalerAttrType = reflect.TypeOf((*MarshalerAttr)(nil)).Elem()
- textMarshalerType = reflect.TypeOf((*encoding.TextMarshaler)(nil)).Elem()
-)
-
-// marshalValue writes one or more XML elements representing val.
-// If val was obtained from a struct field, finfo must have its details.
-func (p *printer) marshalValue(val reflect.Value, finfo *fieldInfo, startTemplate *StartElement) error {
- if startTemplate != nil && startTemplate.Name.Local == "" {
- return fmt.Errorf("xml: EncodeElement of StartElement with missing name")
- }
-
- if !val.IsValid() {
- return nil
- }
- if finfo != nil && finfo.flags&fOmitEmpty != 0 && isEmptyValue(val) {
- return nil
- }
-
- // Drill into interfaces and pointers.
- // This can turn into an infinite loop given a cyclic chain,
- // but it matches the Go 1 behavior.
- for val.Kind() == reflect.Interface || val.Kind() == reflect.Ptr {
- if val.IsNil() {
- return nil
- }
- val = val.Elem()
- }
-
- kind := val.Kind()
- typ := val.Type()
-
- // Check for marshaler.
- if val.CanInterface() && typ.Implements(marshalerType) {
- return p.marshalInterface(val.Interface().(Marshaler), defaultStart(typ, finfo, startTemplate))
- }
- if val.CanAddr() {
- pv := val.Addr()
- if pv.CanInterface() && pv.Type().Implements(marshalerType) {
- return p.marshalInterface(pv.Interface().(Marshaler), defaultStart(pv.Type(), finfo, startTemplate))
- }
- }
-
- // Check for text marshaler.
- if val.CanInterface() && typ.Implements(textMarshalerType) {
- return p.marshalTextInterface(val.Interface().(encoding.TextMarshaler), defaultStart(typ, finfo, startTemplate))
- }
- if val.CanAddr() {
- pv := val.Addr()
- if pv.CanInterface() && pv.Type().Implements(textMarshalerType) {
- return p.marshalTextInterface(pv.Interface().(encoding.TextMarshaler), defaultStart(pv.Type(), finfo, startTemplate))
- }
- }
-
- // Slices and arrays iterate over the elements. They do not have an enclosing tag.
- if (kind == reflect.Slice || kind == reflect.Array) && typ.Elem().Kind() != reflect.Uint8 {
- for i, n := 0, val.Len(); i < n; i++ {
- if err := p.marshalValue(val.Index(i), finfo, startTemplate); err != nil {
- return err
- }
- }
- return nil
- }
-
- tinfo, err := getTypeInfo(typ)
- if err != nil {
- return err
- }
-
- // Create start element.
- // Precedence for the XML element name is:
- // 0. startTemplate
- // 1. XMLName field in underlying struct;
- // 2. field name/tag in the struct field; and
- // 3. type name
- var start StartElement
-
- if startTemplate != nil {
- start.Name = startTemplate.Name
- start.Attr = append(start.Attr, startTemplate.Attr...)
- } else if tinfo.xmlname != nil {
- xmlname := tinfo.xmlname
- if xmlname.name != "" {
- start.Name.Space, start.Name.Local = xmlname.xmlns, xmlname.name
- } else if v, ok := xmlname.value(val).Interface().(Name); ok && v.Local != "" {
- start.Name = v
- }
- }
- if start.Name.Local == "" && finfo != nil {
- start.Name.Space, start.Name.Local = finfo.xmlns, finfo.name
- }
- if start.Name.Local == "" {
- name := typ.Name()
- if name == "" {
- return &UnsupportedTypeError{typ}
- }
- start.Name.Local = name
- }
-
- // Attributes
- for i := range tinfo.fields {
- finfo := &tinfo.fields[i]
- if finfo.flags&fAttr == 0 {
- continue
- }
- fv := finfo.value(val)
- name := Name{Space: finfo.xmlns, Local: finfo.name}
-
- if finfo.flags&fOmitEmpty != 0 && isEmptyValue(fv) {
- continue
- }
-
- if fv.Kind() == reflect.Interface && fv.IsNil() {
- continue
- }
-
- if fv.CanInterface() && fv.Type().Implements(marshalerAttrType) {
- attr, err := fv.Interface().(MarshalerAttr).MarshalXMLAttr(name)
- if err != nil {
- return err
- }
- if attr.Name.Local != "" {
- start.Attr = append(start.Attr, attr)
- }
- continue
- }
-
- if fv.CanAddr() {
- pv := fv.Addr()
- if pv.CanInterface() && pv.Type().Implements(marshalerAttrType) {
- attr, err := pv.Interface().(MarshalerAttr).MarshalXMLAttr(name)
- if err != nil {
- return err
- }
- if attr.Name.Local != "" {
- start.Attr = append(start.Attr, attr)
- }
- continue
- }
- }
-
- if fv.CanInterface() && fv.Type().Implements(textMarshalerType) {
- text, err := fv.Interface().(encoding.TextMarshaler).MarshalText()
- if err != nil {
- return err
- }
- start.Attr = append(start.Attr, Attr{name, string(text)})
- continue
- }
-
- if fv.CanAddr() {
- pv := fv.Addr()
- if pv.CanInterface() && pv.Type().Implements(textMarshalerType) {
- text, err := pv.Interface().(encoding.TextMarshaler).MarshalText()
- if err != nil {
- return err
- }
- start.Attr = append(start.Attr, Attr{name, string(text)})
- continue
- }
- }
-
- // Dereference or skip nil pointer, interface values.
- switch fv.Kind() {
- case reflect.Ptr, reflect.Interface:
- if fv.IsNil() {
- continue
- }
- fv = fv.Elem()
- }
-
- s, b, err := p.marshalSimple(fv.Type(), fv)
- if err != nil {
- return err
- }
- if b != nil {
- s = string(b)
- }
- start.Attr = append(start.Attr, Attr{name, s})
- }
-
- if err := p.writeStart(&start); err != nil {
- return err
- }
-
- if val.Kind() == reflect.Struct {
- err = p.marshalStruct(tinfo, val)
- } else {
- s, b, err1 := p.marshalSimple(typ, val)
- if err1 != nil {
- err = err1
- } else if b != nil {
- EscapeText(p, b)
- } else {
- p.EscapeString(s)
- }
- }
- if err != nil {
- return err
- }
-
- if err := p.writeEnd(start.Name); err != nil {
- return err
- }
-
- return p.cachedWriteError()
-}
-
-// defaultStart returns the default start element to use,
-// given the reflect type, field info, and start template.
-func defaultStart(typ reflect.Type, finfo *fieldInfo, startTemplate *StartElement) StartElement {
- var start StartElement
- // Precedence for the XML element name is as above,
- // except that we do not look inside structs for the first field.
- if startTemplate != nil {
- start.Name = startTemplate.Name
- start.Attr = append(start.Attr, startTemplate.Attr...)
- } else if finfo != nil && finfo.name != "" {
- start.Name.Local = finfo.name
- start.Name.Space = finfo.xmlns
- } else if typ.Name() != "" {
- start.Name.Local = typ.Name()
- } else {
- // Must be a pointer to a named type,
- // since it has the Marshaler methods.
- start.Name.Local = typ.Elem().Name()
- }
- return start
-}
-
-// marshalInterface marshals a Marshaler interface value.
-func (p *printer) marshalInterface(val Marshaler, start StartElement) error {
- // Push a marker onto the tag stack so that MarshalXML
- // cannot close the XML tags that it did not open.
- p.tags = append(p.tags, Name{})
- n := len(p.tags)
-
- err := val.MarshalXML(p.encoder, start)
- if err != nil {
- return err
- }
-
- // Make sure MarshalXML closed all its tags. p.tags[n-1] is the mark.
- if len(p.tags) > n {
- return fmt.Errorf("xml: %s.MarshalXML wrote invalid XML: <%s> not closed", receiverType(val), p.tags[len(p.tags)-1].Local)
- }
- p.tags = p.tags[:n-1]
- return nil
-}
-
-// marshalTextInterface marshals a TextMarshaler interface value.
-func (p *printer) marshalTextInterface(val encoding.TextMarshaler, start StartElement) error {
- if err := p.writeStart(&start); err != nil {
- return err
- }
- text, err := val.MarshalText()
- if err != nil {
- return err
- }
- EscapeText(p, text)
- return p.writeEnd(start.Name)
-}
-
-// writeStart writes the given start element.
-func (p *printer) writeStart(start *StartElement) error {
- if start.Name.Local == "" {
- return fmt.Errorf("xml: start tag with no name")
- }
-
- p.tags = append(p.tags, start.Name)
- p.markPrefix()
-
- p.writeIndent(1)
- p.WriteByte('<')
- p.WriteString(start.Name.Local)
-
- if start.Name.Space != "" {
- p.WriteString(` xmlns="`)
- p.EscapeString(start.Name.Space)
- p.WriteByte('"')
- }
-
- // Attributes
- for _, attr := range start.Attr {
- name := attr.Name
- if name.Local == "" {
- continue
- }
- p.WriteByte(' ')
- if name.Space != "" {
- p.WriteString(p.createAttrPrefix(name.Space))
- p.WriteByte(':')
- }
- p.WriteString(name.Local)
- p.WriteString(`="`)
- p.EscapeString(attr.Value)
- p.WriteByte('"')
- }
- p.WriteByte('>')
- return nil
-}
-
-func (p *printer) writeEnd(name Name) error {
- if name.Local == "" {
- return fmt.Errorf("xml: end tag with no name")
- }
- if len(p.tags) == 0 || p.tags[len(p.tags)-1].Local == "" {
- return fmt.Errorf("xml: end tag </%s> without start tag", name.Local)
- }
- if top := p.tags[len(p.tags)-1]; top != name {
- if top.Local != name.Local {
- return fmt.Errorf("xml: end tag </%s> does not match start tag <%s>", name.Local, top.Local)
- }
- return fmt.Errorf("xml: end tag </%s> in namespace %s does not match start tag <%s> in namespace %s", name.Local, name.Space, top.Local, top.Space)
- }
- p.tags = p.tags[:len(p.tags)-1]
-
- p.writeIndent(-1)
- p.WriteByte('<')
- p.WriteByte('/')
- p.WriteString(name.Local)
- p.WriteByte('>')
- p.popPrefix()
- return nil
-}
-
-func (p *printer) marshalSimple(typ reflect.Type, val reflect.Value) (string, []byte, error) {
- switch val.Kind() {
- case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
- return strconv.FormatInt(val.Int(), 10), nil, nil
- case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
- return strconv.FormatUint(val.Uint(), 10), nil, nil
- case reflect.Float32, reflect.Float64:
- return strconv.FormatFloat(val.Float(), 'g', -1, val.Type().Bits()), nil, nil
- case reflect.String:
- return val.String(), nil, nil
- case reflect.Bool:
- return strconv.FormatBool(val.Bool()), nil, nil
- case reflect.Array:
- if typ.Elem().Kind() != reflect.Uint8 {
- break
- }
- // [...]byte
- var bytes []byte
- if val.CanAddr() {
- bytes = val.Slice(0, val.Len()).Bytes()
- } else {
- bytes = make([]byte, val.Len())
- reflect.Copy(reflect.ValueOf(bytes), val)
- }
- return "", bytes, nil
- case reflect.Slice:
- if typ.Elem().Kind() != reflect.Uint8 {
- break
- }
- // []byte
- return "", val.Bytes(), nil
- }
- return "", nil, &UnsupportedTypeError{typ}
-}
-
-var ddBytes = []byte("--")
-
-func (p *printer) marshalStruct(tinfo *typeInfo, val reflect.Value) error {
- s := parentStack{p: p}
- for i := range tinfo.fields {
- finfo := &tinfo.fields[i]
- if finfo.flags&fAttr != 0 {
- continue
- }
- vf := finfo.value(val)
-
- // Dereference or skip nil pointer, interface values.
- switch vf.Kind() {
- case reflect.Ptr, reflect.Interface:
- if !vf.IsNil() {
- vf = vf.Elem()
- }
- }
-
- switch finfo.flags & fMode {
- case fCharData:
- if vf.CanInterface() && vf.Type().Implements(textMarshalerType) {
- data, err := vf.Interface().(encoding.TextMarshaler).MarshalText()
- if err != nil {
- return err
- }
- Escape(p, data)
- continue
- }
- if vf.CanAddr() {
- pv := vf.Addr()
- if pv.CanInterface() && pv.Type().Implements(textMarshalerType) {
- data, err := pv.Interface().(encoding.TextMarshaler).MarshalText()
- if err != nil {
- return err
- }
- Escape(p, data)
- continue
- }
- }
- var scratch [64]byte
- switch vf.Kind() {
- case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
- Escape(p, strconv.AppendInt(scratch[:0], vf.Int(), 10))
- case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
- Escape(p, strconv.AppendUint(scratch[:0], vf.Uint(), 10))
- case reflect.Float32, reflect.Float64:
- Escape(p, strconv.AppendFloat(scratch[:0], vf.Float(), 'g', -1, vf.Type().Bits()))
- case reflect.Bool:
- Escape(p, strconv.AppendBool(scratch[:0], vf.Bool()))
- case reflect.String:
- if err := EscapeText(p, []byte(vf.String())); err != nil {
- return err
- }
- case reflect.Slice:
- if elem, ok := vf.Interface().([]byte); ok {
- if err := EscapeText(p, elem); err != nil {
- return err
- }
- }
- }
- continue
-
- case fComment:
- k := vf.Kind()
- if !(k == reflect.String || k == reflect.Slice && vf.Type().Elem().Kind() == reflect.Uint8) {
- return fmt.Errorf("xml: bad type for comment field of %s", val.Type())
- }
- if vf.Len() == 0 {
- continue
- }
- p.writeIndent(0)
- p.WriteString("<!--")
- dashDash := false
- dashLast := false
- switch k {
- case reflect.String:
- s := vf.String()
- dashDash = strings.Index(s, "--") >= 0
- dashLast = s[len(s)-1] == '-'
- if !dashDash {
- p.WriteString(s)
- }
- case reflect.Slice:
- b := vf.Bytes()
- dashDash = bytes.Index(b, ddBytes) >= 0
- dashLast = b[len(b)-1] == '-'
- if !dashDash {
- p.Write(b)
- }
- default:
- panic("can't happen")
- }
- if dashDash {
- return fmt.Errorf(`xml: comments must not contain "--"`)
- }
- if dashLast {
- // "--->" is invalid grammar. Make it "- -->"
- p.WriteByte(' ')
- }
- p.WriteString("-->")
- continue
-
- case fInnerXml:
- iface := vf.Interface()
- switch raw := iface.(type) {
- case []byte:
- p.Write(raw)
- continue
- case string:
- p.WriteString(raw)
- continue
- }
-
- case fElement, fElement | fAny:
- if err := s.trim(finfo.parents); err != nil {
- return err
- }
- if len(finfo.parents) > len(s.stack) {
- if vf.Kind() != reflect.Ptr && vf.Kind() != reflect.Interface || !vf.IsNil() {
- if err := s.push(finfo.parents[len(s.stack):]); err != nil {
- return err
- }
- }
- }
- }
- if err := p.marshalValue(vf, finfo, nil); err != nil {
- return err
- }
- }
- s.trim(nil)
- return p.cachedWriteError()
-}
-
-// return the bufio Writer's cached write error
-func (p *printer) cachedWriteError() error {
- _, err := p.Write(nil)
- return err
-}
-
-func (p *printer) writeIndent(depthDelta int) {
- if len(p.prefix) == 0 && len(p.indent) == 0 {
- return
- }
- if depthDelta < 0 {
- p.depth--
- if p.indentedIn {
- p.indentedIn = false
- return
- }
- p.indentedIn = false
- }
- if p.putNewline {
- p.WriteByte('\n')
- } else {
- p.putNewline = true
- }
- if len(p.prefix) > 0 {
- p.WriteString(p.prefix)
- }
- if len(p.indent) > 0 {
- for i := 0; i < p.depth; i++ {
- p.WriteString(p.indent)
- }
- }
- if depthDelta > 0 {
- p.depth++
- p.indentedIn = true
- }
-}
-
-type parentStack struct {
- p *printer
- stack []string
-}
-
-// trim updates the XML context to match the longest common prefix of the stack
-// and the given parents. A closing tag will be written for every parent
-// popped. Passing a zero slice or nil will close all the elements.
-func (s *parentStack) trim(parents []string) error {
- split := 0
- for ; split < len(parents) && split < len(s.stack); split++ {
- if parents[split] != s.stack[split] {
- break
- }
- }
- for i := len(s.stack) - 1; i >= split; i-- {
- if err := s.p.writeEnd(Name{Local: s.stack[i]}); err != nil {
- return err
- }
- }
- s.stack = parents[:split]
- return nil
-}
-
-// push adds parent elements to the stack and writes open tags.
-func (s *parentStack) push(parents []string) error {
- for i := 0; i < len(parents); i++ {
- if err := s.p.writeStart(&StartElement{Name: Name{Local: parents[i]}}); err != nil {
- return err
- }
- }
- s.stack = append(s.stack, parents...)
- return nil
-}
-
-// A MarshalXMLError is returned when Marshal encounters a type
-// that cannot be converted into XML.
-type UnsupportedTypeError struct {
- Type reflect.Type
-}
-
-func (e *UnsupportedTypeError) Error() string {
- return "xml: unsupported type: " + e.Type.String()
-}
-
-func isEmptyValue(v reflect.Value) bool {
- switch v.Kind() {
- case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
- return v.Len() == 0
- case reflect.Bool:
- return !v.Bool()
- case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
- return v.Int() == 0
- case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
- return v.Uint() == 0
- case reflect.Float32, reflect.Float64:
- return v.Float() == 0
- case reflect.Interface, reflect.Ptr:
- return v.IsNil()
- }
- return false
-}
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-29 00:43:33 +0000