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path: root/src/pkg/json/decode.go
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Diffstat (limited to 'src/pkg/json/decode.go')
-rw-r--r--src/pkg/json/decode.go917
1 files changed, 0 insertions, 917 deletions
diff --git a/src/pkg/json/decode.go b/src/pkg/json/decode.go
deleted file mode 100644
index 35a06b0f9..000000000
--- a/src/pkg/json/decode.go
+++ /dev/null
@@ -1,917 +0,0 @@
-// Copyright 2010 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.
-
-// Represents JSON data structure using native Go types: booleans, floats,
-// strings, arrays, and maps.
-
-package json
-
-import (
- "container/vector"
- "encoding/base64"
- "os"
- "reflect"
- "runtime"
- "strconv"
- "strings"
- "unicode"
- "utf16"
- "utf8"
-)
-
-// Unmarshal parses the JSON-encoded data and stores the result
-// in the value pointed to by v.
-//
-// Unmarshal traverses the value v recursively.
-// If an encountered value implements the Unmarshaler interface,
-// Unmarshal calls its UnmarshalJSON method with a well-formed
-// JSON encoding.
-//
-// Otherwise, Unmarshal uses the inverse of the encodings that
-// Marshal uses, allocating maps, slices, and pointers as necessary,
-// with the following additional rules:
-//
-// To unmarshal a JSON value into a nil interface value, the
-// type stored in the interface value is one of:
-//
-// bool, for JSON booleans
-// float64, for JSON numbers
-// string, for JSON strings
-// []interface{}, for JSON arrays
-// map[string]interface{}, for JSON objects
-// nil for JSON null
-//
-// If a JSON value is not appropriate for a given target type,
-// or if a JSON number overflows the target type, Unmarshal
-// skips that field and completes the unmarshalling as best it can.
-// If no more serious errors are encountered, Unmarshal returns
-// an UnmarshalTypeError describing the earliest such error.
-//
-func Unmarshal(data []byte, v interface{}) os.Error {
- d := new(decodeState).init(data)
-
- // Quick check for well-formedness.
- // Avoids filling out half a data structure
- // before discovering a JSON syntax error.
- err := checkValid(data, &d.scan)
- if err != nil {
- return err
- }
-
- return d.unmarshal(v)
-}
-
-// Unmarshaler is the interface implemented by objects
-// that can unmarshal a JSON description of themselves.
-// The input can be assumed to be a valid JSON object
-// encoding. UnmarshalJSON must copy the JSON data
-// if it wishes to retain the data after returning.
-type Unmarshaler interface {
- UnmarshalJSON([]byte) os.Error
-}
-
-
-// An UnmarshalTypeError describes a JSON value that was
-// not appropriate for a value of a specific Go type.
-type UnmarshalTypeError struct {
- Value string // description of JSON value - "bool", "array", "number -5"
- Type reflect.Type // type of Go value it could not be assigned to
-}
-
-func (e *UnmarshalTypeError) String() string {
- return "json: cannot unmarshal " + e.Value + " into Go value of type " + e.Type.String()
-}
-
-// An UnmarshalFieldError describes a JSON object key that
-// led to an unexported (and therefore unwritable) struct field.
-type UnmarshalFieldError struct {
- Key string
- Type reflect.Type
- Field reflect.StructField
-}
-
-func (e *UnmarshalFieldError) String() string {
- return "json: cannot unmarshal object key " + strconv.Quote(e.Key) + " into unexported field " + e.Field.Name + " of type " + e.Type.String()
-}
-
-// An InvalidUnmarshalError describes an invalid argument passed to Unmarshal.
-// (The argument to Unmarshal must be a non-nil pointer.)
-type InvalidUnmarshalError struct {
- Type reflect.Type
-}
-
-func (e *InvalidUnmarshalError) String() string {
- if e.Type == nil {
- return "json: Unmarshal(nil)"
- }
-
- if e.Type.Kind() != reflect.Ptr {
- return "json: Unmarshal(non-pointer " + e.Type.String() + ")"
- }
- return "json: Unmarshal(nil " + e.Type.String() + ")"
-}
-
-func (d *decodeState) unmarshal(v interface{}) (err os.Error) {
- defer func() {
- if r := recover(); r != nil {
- if _, ok := r.(runtime.Error); ok {
- panic(r)
- }
- err = r.(os.Error)
- }
- }()
-
- rv := reflect.ValueOf(v)
- pv := rv
- if pv.Kind() != reflect.Ptr || pv.IsNil() {
- return &InvalidUnmarshalError{reflect.TypeOf(v)}
- }
-
- d.scan.reset()
- // We decode rv not pv.Elem because the Unmarshaler interface
- // test must be applied at the top level of the value.
- d.value(rv)
- return d.savedError
-}
-
-// decodeState represents the state while decoding a JSON value.
-type decodeState struct {
- data []byte
- off int // read offset in data
- scan scanner
- nextscan scanner // for calls to nextValue
- savedError os.Error
-}
-
-// errPhase is used for errors that should not happen unless
-// there is a bug in the JSON decoder or something is editing
-// the data slice while the decoder executes.
-var errPhase = os.NewError("JSON decoder out of sync - data changing underfoot?")
-
-func (d *decodeState) init(data []byte) *decodeState {
- d.data = data
- d.off = 0
- d.savedError = nil
- return d
-}
-
-// error aborts the decoding by panicking with err.
-func (d *decodeState) error(err os.Error) {
- panic(err)
-}
-
-// saveError saves the first err it is called with,
-// for reporting at the end of the unmarshal.
-func (d *decodeState) saveError(err os.Error) {
- if d.savedError == nil {
- d.savedError = err
- }
-}
-
-// next cuts off and returns the next full JSON value in d.data[d.off:].
-// The next value is known to be an object or array, not a literal.
-func (d *decodeState) next() []byte {
- c := d.data[d.off]
- item, rest, err := nextValue(d.data[d.off:], &d.nextscan)
- if err != nil {
- d.error(err)
- }
- d.off = len(d.data) - len(rest)
-
- // Our scanner has seen the opening brace/bracket
- // and thinks we're still in the middle of the object.
- // invent a closing brace/bracket to get it out.
- if c == '{' {
- d.scan.step(&d.scan, '}')
- } else {
- d.scan.step(&d.scan, ']')
- }
-
- return item
-}
-
-// scanWhile processes bytes in d.data[d.off:] until it
-// receives a scan code not equal to op.
-// It updates d.off and returns the new scan code.
-func (d *decodeState) scanWhile(op int) int {
- var newOp int
- for {
- if d.off >= len(d.data) {
- newOp = d.scan.eof()
- d.off = len(d.data) + 1 // mark processed EOF with len+1
- } else {
- c := int(d.data[d.off])
- d.off++
- newOp = d.scan.step(&d.scan, c)
- }
- if newOp != op {
- break
- }
- }
- return newOp
-}
-
-// value decodes a JSON value from d.data[d.off:] into the value.
-// it updates d.off to point past the decoded value.
-func (d *decodeState) value(v reflect.Value) {
- if !v.IsValid() {
- _, rest, err := nextValue(d.data[d.off:], &d.nextscan)
- if err != nil {
- d.error(err)
- }
- d.off = len(d.data) - len(rest)
-
- // d.scan thinks we're still at the beginning of the item.
- // Feed in an empty string - the shortest, simplest value -
- // so that it knows we got to the end of the value.
- if d.scan.step == stateRedo {
- panic("redo")
- }
- d.scan.step(&d.scan, '"')
- d.scan.step(&d.scan, '"')
- return
- }
-
- switch op := d.scanWhile(scanSkipSpace); op {
- default:
- d.error(errPhase)
-
- case scanBeginArray:
- d.array(v)
-
- case scanBeginObject:
- d.object(v)
-
- case scanBeginLiteral:
- d.literal(v)
- }
-}
-
-// indirect walks down v allocating pointers as needed,
-// until it gets to a non-pointer.
-// if it encounters an Unmarshaler, indirect stops and returns that.
-// if wantptr is true, indirect stops at the last pointer.
-func (d *decodeState) indirect(v reflect.Value, wantptr bool) (Unmarshaler, reflect.Value) {
- for {
- var isUnmarshaler bool
- if v.Type().NumMethod() > 0 {
- // Remember that this is an unmarshaler,
- // but wait to return it until after allocating
- // the pointer (if necessary).
- _, isUnmarshaler = v.Interface().(Unmarshaler)
- }
-
- if iv := v; iv.Kind() == reflect.Interface && !iv.IsNil() {
- v = iv.Elem()
- continue
- }
-
- pv := v
- if pv.Kind() != reflect.Ptr {
- break
- }
-
- if pv.Elem().Kind() != reflect.Ptr && wantptr && pv.CanSet() && !isUnmarshaler {
- return nil, pv
- }
- if pv.IsNil() {
- pv.Set(reflect.New(pv.Type().Elem()))
- }
- if isUnmarshaler {
- // Using v.Interface().(Unmarshaler)
- // here means that we have to use a pointer
- // as the struct field. We cannot use a value inside
- // a pointer to a struct, because in that case
- // v.Interface() is the value (x.f) not the pointer (&x.f).
- // This is an unfortunate consequence of reflect.
- // An alternative would be to look up the
- // UnmarshalJSON method and return a FuncValue.
- return v.Interface().(Unmarshaler), reflect.Value{}
- }
- v = pv.Elem()
- }
- return nil, v
-}
-
-// array consumes an array from d.data[d.off-1:], decoding into the value v.
-// the first byte of the array ('[') has been read already.
-func (d *decodeState) array(v reflect.Value) {
- // Check for unmarshaler.
- unmarshaler, pv := d.indirect(v, false)
- if unmarshaler != nil {
- d.off--
- err := unmarshaler.UnmarshalJSON(d.next())
- if err != nil {
- d.error(err)
- }
- return
- }
- v = pv
-
- // Decoding into nil interface? Switch to non-reflect code.
- iv := v
- ok := iv.Kind() == reflect.Interface
- if ok {
- iv.Set(reflect.ValueOf(d.arrayInterface()))
- return
- }
-
- // Check type of target.
- av := v
- if av.Kind() != reflect.Array && av.Kind() != reflect.Slice {
- d.saveError(&UnmarshalTypeError{"array", v.Type()})
- d.off--
- d.next()
- return
- }
-
- sv := v
-
- i := 0
- for {
- // Look ahead for ] - can only happen on first iteration.
- op := d.scanWhile(scanSkipSpace)
- if op == scanEndArray {
- break
- }
-
- // Back up so d.value can have the byte we just read.
- d.off--
- d.scan.undo(op)
-
- // Get element of array, growing if necessary.
- if i >= av.Cap() && sv.IsValid() {
- newcap := sv.Cap() + sv.Cap()/2
- if newcap < 4 {
- newcap = 4
- }
- newv := reflect.MakeSlice(sv.Type(), sv.Len(), newcap)
- reflect.Copy(newv, sv)
- sv.Set(newv)
- }
- if i >= av.Len() && sv.IsValid() {
- // Must be slice; gave up on array during i >= av.Cap().
- sv.SetLen(i + 1)
- }
-
- // Decode into element.
- if i < av.Len() {
- d.value(av.Index(i))
- } else {
- // Ran out of fixed array: skip.
- d.value(reflect.Value{})
- }
- i++
-
- // Next token must be , or ].
- op = d.scanWhile(scanSkipSpace)
- if op == scanEndArray {
- break
- }
- if op != scanArrayValue {
- d.error(errPhase)
- }
- }
- if i < av.Len() {
- if !sv.IsValid() {
- // Array. Zero the rest.
- z := reflect.Zero(av.Type().Elem())
- for ; i < av.Len(); i++ {
- av.Index(i).Set(z)
- }
- } else {
- sv.SetLen(i)
- }
- }
-}
-
-// matchName returns true if key should be written to a field named name.
-func matchName(key, name string) bool {
- return strings.ToLower(key) == strings.ToLower(name)
-}
-
-// object consumes an object from d.data[d.off-1:], decoding into the value v.
-// the first byte of the object ('{') has been read already.
-func (d *decodeState) object(v reflect.Value) {
- // Check for unmarshaler.
- unmarshaler, pv := d.indirect(v, false)
- if unmarshaler != nil {
- d.off--
- err := unmarshaler.UnmarshalJSON(d.next())
- if err != nil {
- d.error(err)
- }
- return
- }
- v = pv
-
- // Decoding into nil interface? Switch to non-reflect code.
- iv := v
- if iv.Kind() == reflect.Interface {
- iv.Set(reflect.ValueOf(d.objectInterface()))
- return
- }
-
- // Check type of target: struct or map[string]T
- var (
- mv reflect.Value
- sv reflect.Value
- )
- switch v.Kind() {
- case reflect.Map:
- // map must have string type
- t := v.Type()
- if t.Key() != reflect.TypeOf("") {
- d.saveError(&UnmarshalTypeError{"object", v.Type()})
- break
- }
- mv = v
- if mv.IsNil() {
- mv.Set(reflect.MakeMap(t))
- }
- case reflect.Struct:
- sv = v
- default:
- d.saveError(&UnmarshalTypeError{"object", v.Type()})
- }
-
- if !mv.IsValid() && !sv.IsValid() {
- d.off--
- d.next() // skip over { } in input
- return
- }
-
- var mapElem reflect.Value
-
- for {
- // Read opening " of string key or closing }.
- op := d.scanWhile(scanSkipSpace)
- if op == scanEndObject {
- // closing } - can only happen on first iteration.
- break
- }
- if op != scanBeginLiteral {
- d.error(errPhase)
- }
-
- // Read string key.
- start := d.off - 1
- op = d.scanWhile(scanContinue)
- item := d.data[start : d.off-1]
- key, ok := unquote(item)
- if !ok {
- d.error(errPhase)
- }
-
- // Figure out field corresponding to key.
- var subv reflect.Value
- if mv.IsValid() {
- elemType := mv.Type().Elem()
- if !mapElem.IsValid() {
- mapElem = reflect.New(elemType).Elem()
- } else {
- mapElem.Set(reflect.Zero(elemType))
- }
- subv = mapElem
- } else {
- var f reflect.StructField
- var ok bool
- st := sv.Type()
- // First try for field with that tag.
- if isValidTag(key) {
- for i := 0; i < sv.NumField(); i++ {
- f = st.Field(i)
- if f.Tag.Get("json") == key {
- ok = true
- break
- }
- }
- }
- if !ok {
- // Second, exact match.
- f, ok = st.FieldByName(key)
- }
- if !ok {
- // Third, case-insensitive match.
- f, ok = st.FieldByNameFunc(func(s string) bool { return matchName(key, s) })
- }
-
- // Extract value; name must be exported.
- if ok {
- if f.PkgPath != "" {
- d.saveError(&UnmarshalFieldError{key, st, f})
- } else {
- subv = sv.FieldByIndex(f.Index)
- }
- }
- }
-
- // Read : before value.
- if op == scanSkipSpace {
- op = d.scanWhile(scanSkipSpace)
- }
- if op != scanObjectKey {
- d.error(errPhase)
- }
-
- // Read value.
- d.value(subv)
-
- // Write value back to map;
- // if using struct, subv points into struct already.
- if mv.IsValid() {
- mv.SetMapIndex(reflect.ValueOf(key), subv)
- }
-
- // Next token must be , or }.
- op = d.scanWhile(scanSkipSpace)
- if op == scanEndObject {
- break
- }
- if op != scanObjectValue {
- d.error(errPhase)
- }
- }
-}
-
-// literal consumes a literal from d.data[d.off-1:], decoding into the value v.
-// The first byte of the literal has been read already
-// (that's how the caller knows it's a literal).
-func (d *decodeState) literal(v reflect.Value) {
- // All bytes inside literal return scanContinue op code.
- start := d.off - 1
- op := d.scanWhile(scanContinue)
-
- // Scan read one byte too far; back up.
- d.off--
- d.scan.undo(op)
- item := d.data[start:d.off]
-
- // Check for unmarshaler.
- wantptr := item[0] == 'n' // null
- unmarshaler, pv := d.indirect(v, wantptr)
- if unmarshaler != nil {
- err := unmarshaler.UnmarshalJSON(item)
- if err != nil {
- d.error(err)
- }
- return
- }
- v = pv
-
- switch c := item[0]; c {
- case 'n': // null
- switch v.Kind() {
- default:
- d.saveError(&UnmarshalTypeError{"null", v.Type()})
- case reflect.Interface, reflect.Ptr, reflect.Map:
- v.Set(reflect.Zero(v.Type()))
- }
-
- case 't', 'f': // true, false
- value := c == 't'
- switch v.Kind() {
- default:
- d.saveError(&UnmarshalTypeError{"bool", v.Type()})
- case reflect.Bool:
- v.SetBool(value)
- case reflect.Interface:
- v.Set(reflect.ValueOf(value))
- }
-
- case '"': // string
- s, ok := unquoteBytes(item)
- if !ok {
- d.error(errPhase)
- }
- switch v.Kind() {
- default:
- d.saveError(&UnmarshalTypeError{"string", v.Type()})
- case reflect.Slice:
- if v.Type() != byteSliceType {
- d.saveError(&UnmarshalTypeError{"string", v.Type()})
- break
- }
- b := make([]byte, base64.StdEncoding.DecodedLen(len(s)))
- n, err := base64.StdEncoding.Decode(b, s)
- if err != nil {
- d.saveError(err)
- break
- }
- v.Set(reflect.ValueOf(b[0:n]))
- case reflect.String:
- v.SetString(string(s))
- case reflect.Interface:
- v.Set(reflect.ValueOf(string(s)))
- }
-
- default: // number
- if c != '-' && (c < '0' || c > '9') {
- d.error(errPhase)
- }
- s := string(item)
- switch v.Kind() {
- default:
- d.error(&UnmarshalTypeError{"number", v.Type()})
- case reflect.Interface:
- n, err := strconv.Atof64(s)
- if err != nil {
- d.saveError(&UnmarshalTypeError{"number " + s, v.Type()})
- break
- }
- v.Set(reflect.ValueOf(n))
-
- case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
- n, err := strconv.Atoi64(s)
- if err != nil || v.OverflowInt(n) {
- d.saveError(&UnmarshalTypeError{"number " + s, v.Type()})
- break
- }
- v.SetInt(n)
-
- case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
- n, err := strconv.Atoui64(s)
- if err != nil || v.OverflowUint(n) {
- d.saveError(&UnmarshalTypeError{"number " + s, v.Type()})
- break
- }
- v.SetUint(n)
-
- case reflect.Float32, reflect.Float64:
- n, err := strconv.AtofN(s, v.Type().Bits())
- if err != nil || v.OverflowFloat(n) {
- d.saveError(&UnmarshalTypeError{"number " + s, v.Type()})
- break
- }
- v.SetFloat(n)
- }
- }
-}
-
-// The xxxInterface routines build up a value to be stored
-// in an empty interface. They are not strictly necessary,
-// but they avoid the weight of reflection in this common case.
-
-// valueInterface is like value but returns interface{}
-func (d *decodeState) valueInterface() interface{} {
- switch d.scanWhile(scanSkipSpace) {
- default:
- d.error(errPhase)
- case scanBeginArray:
- return d.arrayInterface()
- case scanBeginObject:
- return d.objectInterface()
- case scanBeginLiteral:
- return d.literalInterface()
- }
- panic("unreachable")
-}
-
-// arrayInterface is like array but returns []interface{}.
-func (d *decodeState) arrayInterface() []interface{} {
- var v vector.Vector
- for {
- // Look ahead for ] - can only happen on first iteration.
- op := d.scanWhile(scanSkipSpace)
- if op == scanEndArray {
- break
- }
-
- // Back up so d.value can have the byte we just read.
- d.off--
- d.scan.undo(op)
-
- v.Push(d.valueInterface())
-
- // Next token must be , or ].
- op = d.scanWhile(scanSkipSpace)
- if op == scanEndArray {
- break
- }
- if op != scanArrayValue {
- d.error(errPhase)
- }
- }
- return v
-}
-
-// objectInterface is like object but returns map[string]interface{}.
-func (d *decodeState) objectInterface() map[string]interface{} {
- m := make(map[string]interface{})
- for {
- // Read opening " of string key or closing }.
- op := d.scanWhile(scanSkipSpace)
- if op == scanEndObject {
- // closing } - can only happen on first iteration.
- break
- }
- if op != scanBeginLiteral {
- d.error(errPhase)
- }
-
- // Read string key.
- start := d.off - 1
- op = d.scanWhile(scanContinue)
- item := d.data[start : d.off-1]
- key, ok := unquote(item)
- if !ok {
- d.error(errPhase)
- }
-
- // Read : before value.
- if op == scanSkipSpace {
- op = d.scanWhile(scanSkipSpace)
- }
- if op != scanObjectKey {
- d.error(errPhase)
- }
-
- // Read value.
- m[key] = d.valueInterface()
-
- // Next token must be , or }.
- op = d.scanWhile(scanSkipSpace)
- if op == scanEndObject {
- break
- }
- if op != scanObjectValue {
- d.error(errPhase)
- }
- }
- return m
-}
-
-
-// literalInterface is like literal but returns an interface value.
-func (d *decodeState) literalInterface() interface{} {
- // All bytes inside literal return scanContinue op code.
- start := d.off - 1
- op := d.scanWhile(scanContinue)
-
- // Scan read one byte too far; back up.
- d.off--
- d.scan.undo(op)
- item := d.data[start:d.off]
-
- switch c := item[0]; c {
- case 'n': // null
- return nil
-
- case 't', 'f': // true, false
- return c == 't'
-
- case '"': // string
- s, ok := unquote(item)
- if !ok {
- d.error(errPhase)
- }
- return s
-
- default: // number
- if c != '-' && (c < '0' || c > '9') {
- d.error(errPhase)
- }
- n, err := strconv.Atof64(string(item))
- if err != nil {
- d.saveError(&UnmarshalTypeError{"number " + string(item), reflect.TypeOf(0.0)})
- }
- return n
- }
- panic("unreachable")
-}
-
-// getu4 decodes \uXXXX from the beginning of s, returning the hex value,
-// or it returns -1.
-func getu4(s []byte) int {
- if len(s) < 6 || s[0] != '\\' || s[1] != 'u' {
- return -1
- }
- rune, err := strconv.Btoui64(string(s[2:6]), 16)
- if err != nil {
- return -1
- }
- return int(rune)
-}
-
-// unquote converts a quoted JSON string literal s into an actual string t.
-// The rules are different than for Go, so cannot use strconv.Unquote.
-func unquote(s []byte) (t string, ok bool) {
- s, ok = unquoteBytes(s)
- t = string(s)
- return
-}
-
-func unquoteBytes(s []byte) (t []byte, ok bool) {
- if len(s) < 2 || s[0] != '"' || s[len(s)-1] != '"' {
- return
- }
- s = s[1 : len(s)-1]
-
- // Check for unusual characters. If there are none,
- // then no unquoting is needed, so return a slice of the
- // original bytes.
- r := 0
- for r < len(s) {
- c := s[r]
- if c == '\\' || c == '"' || c < ' ' {
- break
- }
- if c < utf8.RuneSelf {
- r++
- continue
- }
- rune, size := utf8.DecodeRune(s[r:])
- if rune == utf8.RuneError && size == 1 {
- break
- }
- r += size
- }
- if r == len(s) {
- return s, true
- }
-
- b := make([]byte, len(s)+2*utf8.UTFMax)
- w := copy(b, s[0:r])
- for r < len(s) {
- // Out of room? Can only happen if s is full of
- // malformed UTF-8 and we're replacing each
- // byte with RuneError.
- if w >= len(b)-2*utf8.UTFMax {
- nb := make([]byte, (len(b)+utf8.UTFMax)*2)
- copy(nb, b[0:w])
- b = nb
- }
- switch c := s[r]; {
- case c == '\\':
- r++
- if r >= len(s) {
- return
- }
- switch s[r] {
- default:
- return
- case '"', '\\', '/', '\'':
- b[w] = s[r]
- r++
- w++
- case 'b':
- b[w] = '\b'
- r++
- w++
- case 'f':
- b[w] = '\f'
- r++
- w++
- case 'n':
- b[w] = '\n'
- r++
- w++
- case 'r':
- b[w] = '\r'
- r++
- w++
- case 't':
- b[w] = '\t'
- r++
- w++
- case 'u':
- r--
- rune := getu4(s[r:])
- if rune < 0 {
- return
- }
- r += 6
- if utf16.IsSurrogate(rune) {
- rune1 := getu4(s[r:])
- if dec := utf16.DecodeRune(rune, rune1); dec != unicode.ReplacementChar {
- // A valid pair; consume.
- r += 6
- w += utf8.EncodeRune(b[w:], dec)
- break
- }
- // Invalid surrogate; fall back to replacement rune.
- rune = unicode.ReplacementChar
- }
- w += utf8.EncodeRune(b[w:], rune)
- }
-
- // Quote, control characters are invalid.
- case c == '"', c < ' ':
- return
-
- // ASCII
- case c < utf8.RuneSelf:
- b[w] = c
- r++
- w++
-
- // Coerce to well-formed UTF-8.
- default:
- rune, size := utf8.DecodeRune(s[r:])
- r += size
- w += utf8.EncodeRune(b[w:], rune)
- }
- }
- return b[0:w], true
-}
generated by cgit v1.2.3 (git 2.39.1) at 2025-05-15 01:10:54 +0000