// convert to float64
func ToFloat(input reflect.Value) (output float64, err error) {
//defer checkError(err)
if !input.IsValid() {
return 0, newTypeErr(methodName(), "input is invalid", input)
}
input = Underlying(input)
k := input.Kind()
switch {
case IsBool(k):
if input.Bool() {
return 1, nil
}
return 0, nil
case IsInt(k):
return float64(input.Int()), nil
case IsUint(k):
return float64(input.Uint()), nil
case IsFloat(k):
return input.Float(), nil
case IsString(k):
return strconv.ParseFloat(input.String(), 32)
default:
}
return 0, newTypeErr(methodName(), "input can not convert to float", input)
}
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}
}
// for insert and update
// If already assigned, then just ignore tag
func GetValQuoteStr(val reflect.Value) (string, error) {
switch val.Kind() {
case reflect.Bool:
boolStr := "N"
if val.Bool() {
boolStr = "Y"
}
return boolStr, nil
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return strconv.FormatInt(val.Int(), 10), nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return strconv.FormatUint(val.Uint(), 10), nil
case reflect.Float32, reflect.Float64:
return strconv.FormatFloat(val.Float(), 'f', -1, 64), nil
case reflect.String:
return QuoteStr(val.String()), nil
case reflect.Slice: //[]byte
if val.Type().Elem().Name() != "uint8" {
return "", fmt.Errorf("GetValQuoteStr> slicetype is not []byte: %v", val.Interface())
}
return QuoteStr(string(val.Interface().([]byte))), nil
default:
return "", fmt.Errorf("GetValQuoteStr> reflect.Value is not a string/int/uint/float/bool/[]byte!\nval: %v", val)
}
return "", nil
}
func (c *FlatMapConfig) flatten(result map[string]interface{}, prefix string, v reflect.Value) error {
var err error
if v.Kind() == reflect.Interface {
v = v.Elem()
}
// Set as type interface
// https://golang.org/pkg/reflect/#Kind
switch v.Kind() {
case reflect.Bool:
result[c.keyDelim+prefix] = v.Bool()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32:
result[c.keyDelim+prefix] = v.Int()
case reflect.String:
result[c.keyDelim+prefix] = v.String()
case reflect.Map:
err = c.flattenMap(result, prefix, v)
case reflect.Slice, reflect.Array:
err = c.flattenSlice(result, prefix, v)
default:
err = fmt.Errorf("Unknown primitive type found for value: '%q'", v)
}
return err
}
func (this *databaseImplement) value2Interface(fieldValue reflect.Value) (interface{}, error) {
fieldType := fieldValue.Type()
fieldTypeKind := fieldType.Kind()
switch fieldTypeKind {
case reflect.Bool:
return fieldValue.Bool(), nil
case reflect.String:
return fieldValue.String(), nil
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
return fieldValue.Int(), nil
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
return fieldValue.Uint(), nil
case reflect.Float32, reflect.Float64:
return fieldValue.Float(), nil
case reflect.Struct:
if fieldType == reflect.TypeOf(time.Time{}) {
t := fieldValue.Interface().(time.Time)
tf := t.Format("2006-01-02 15:04:05")
return tf, nil
} else {
return nil, fmt.Errorf("Unsupported type %v", fieldType)
}
default:
return nil, fmt.Errorf("Unsupported type %v", fieldType)
}
}
func boolEncoder(v reflect.Value) interface{} {
if v.Bool() {
return true
} else {
return false
}
}
// valueString returns the string representation of a value.
func valueString(v reflect.Value, opts tagOptions) string {
for v.Kind() == reflect.Ptr {
if v.IsNil() {
return ""
}
v = v.Elem()
}
if v.Kind() == reflect.Bool && opts.Contains("int") {
if v.Bool() {
return "1"
}
return "0"
}
if v.Type() == timeType {
t := v.Interface().(time.Time)
if opts.Contains("unix") {
return strconv.FormatInt(t.Unix(), 10)
}
return t.Format(time.RFC3339)
}
return fmt.Sprint(v.Interface())
}
func boolAsStringDecoder(dv, sv reflect.Value) {
if sv.Bool() {
dv.SetString("1")
} else {
dv.SetString("0")
}
}
func boolEncoder(e *encodeState, v reflect.Value) {
if v.Bool() {
e.WriteString("true")
} else {
e.WriteString("false")
}
}
func boolAsUintDecoder(dv, sv reflect.Value) {
if sv.Bool() {
dv.SetUint(1)
} else {
dv.SetUint(0)
}
}
func boolAsFloatDecoder(dv, sv reflect.Value) {
if sv.Bool() {
dv.SetFloat(1)
} else {
dv.SetFloat(0)
}
}
func isZero(v reflect.Value) bool {
switch v.Kind() {
case reflect.String:
return len(v.String()) == 0
case reflect.Ptr, reflect.Interface:
return v.IsNil()
case reflect.Slice:
return v.Len() == 0
case reflect.Map:
return v.Len() == 0
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.Bool:
return !v.Bool()
case reflect.Struct:
vt := v.Type()
if vt == typeTime {
return v.Interface().(time.Time).IsZero()
}
for i := 0; i < v.NumField(); i++ {
if vt.Field(i).PkgPath != "" && !vt.Field(i).Anonymous {
continue // Private field
}
if !isZero(v.Field(i)) {
return false
}
}
return true
}
return false
}
// formatAtom formats a value without inspecting its internal structure.
// It is a copy of the the function in gopl.io/ch11/format.
func formatAtom(v reflect.Value) string {
switch v.Kind() {
case reflect.Invalid:
return "invalid"
case reflect.Int, reflect.Int8, reflect.Int16,
reflect.Int32, reflect.Int64:
return strconv.FormatInt(v.Int(), 10)
case reflect.Uint, reflect.Uint8, reflect.Uint16,
reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return strconv.FormatUint(v.Uint(), 10)
// ...floating-point and complex cases omitted for brevity...
case reflect.Bool:
if v.Bool() {
return "true"
}
return "false"
case reflect.String:
return strconv.Quote(v.String())
case reflect.Chan, reflect.Func, reflect.Ptr,
reflect.Slice, reflect.Map:
return v.Type().String() + " 0x" +
strconv.FormatUint(uint64(v.Pointer()), 16)
default: // reflect.Array, reflect.Struct, reflect.Interface
return v.Type().String() + " value"
}
}
func (p *printer) marshalSimple(typ reflect.Type, val reflect.Value) error {
// Normally we don't see structs, but this can happen for an attribute.
if val.Type() == timeType {
p.WriteString(val.Interface().(time.Time).Format(time.RFC3339Nano))
return nil
}
switch val.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
p.WriteString(strconv.FormatInt(val.Int(), 10))
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
p.WriteString(strconv.FormatUint(val.Uint(), 10))
case reflect.Float32, reflect.Float64:
p.WriteString(strconv.FormatFloat(val.Float(), 'g', -1, 64))
case reflect.String:
// TODO: Add EscapeString.
Escape(p, []byte(val.String()))
case reflect.Bool:
p.WriteString(strconv.FormatBool(val.Bool()))
case reflect.Array:
// will be [...]byte
bytes := make([]byte, val.Len())
for i := range bytes {
bytes[i] = val.Index(i).Interface().(byte)
}
Escape(p, bytes)
case reflect.Slice:
// will be []byte
Escape(p, val.Bytes())
default:
return &UnsupportedTypeError{typ}
}
return p.cachedWriteError()
}
func encodeValue(buf []byte, prefix, name string, fv reflect.Value, inArray, arrayTable bool) ([]byte, error) {
switch t := fv.Interface().(type) {
case Marshaler:
b, err := t.MarshalTOML()
if err != nil {
return nil, err
}
return appendNewline(append(appendKey(buf, name, inArray, arrayTable), b...), inArray, arrayTable), nil
case time.Time:
return appendNewline(encodeTime(appendKey(buf, name, inArray, arrayTable), t), inArray, arrayTable), nil
}
switch fv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return appendNewline(encodeInt(appendKey(buf, name, inArray, arrayTable), fv.Int()), inArray, arrayTable), nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return appendNewline(encodeUint(appendKey(buf, name, inArray, arrayTable), fv.Uint()), inArray, arrayTable), nil
case reflect.Float32, reflect.Float64:
return appendNewline(encodeFloat(appendKey(buf, name, inArray, arrayTable), fv.Float()), inArray, arrayTable), nil
case reflect.Bool:
return appendNewline(encodeBool(appendKey(buf, name, inArray, arrayTable), fv.Bool()), inArray, arrayTable), nil
case reflect.String:
return appendNewline(encodeString(appendKey(buf, name, inArray, arrayTable), fv.String()), inArray, arrayTable), nil
case reflect.Slice, reflect.Array:
ft := fv.Type().Elem()
for ft.Kind() == reflect.Ptr {
ft = ft.Elem()
}
if ft.Kind() == reflect.Struct {
name := tableName(prefix, name)
var err error
for i := 0; i < fv.Len(); i++ {
if buf, err = marshal(append(append(append(buf, '[', '['), name...), ']', ']', '\n'), name, fv.Index(i), false, true); err != nil {
return nil, err
}
}
return buf, nil
}
buf = append(appendKey(buf, name, inArray, arrayTable), '[')
var err error
for i := 0; i < fv.Len(); i++ {
if i != 0 {
buf = append(buf, ',')
}
if buf, err = encodeValue(buf, prefix, name, fv.Index(i), true, false); err != nil {
return nil, err
}
}
return appendNewline(append(buf, ']'), inArray, arrayTable), nil
case reflect.Struct:
name := tableName(prefix, name)
return marshal(append(append(append(buf, '['), name...), ']', '\n'), name, fv, inArray, arrayTable)
case reflect.Interface:
var err error
if buf, err = encodeInterface(appendKey(buf, name, inArray, arrayTable), fv.Interface()); err != nil {
return nil, err
}
return appendNewline(buf, inArray, arrayTable), nil
}
return nil, fmt.Errorf("toml: marshal: unsupported type %v", fv.Kind())
}
func indexBytes(typ reflect.Type, value reflect.Value) (b []byte, err error) {
switch typ.Kind() {
case reflect.String:
b = []byte(value.String())
case reflect.Int:
buf := new(bytes.Buffer)
if err = binary.Write(buf, binary.BigEndian, value.Int()); err != nil {
return
}
b = buf.Bytes()
case reflect.Slice:
switch typ.Elem().Kind() {
case reflect.Uint8:
b = value.Bytes()
default:
err = fmt.Errorf("%v is not an indexable type", typ)
}
case reflect.Bool:
if value.Bool() {
b = []byte{1}
} else {
b = []byte{0}
}
default:
err = fmt.Errorf("%v is not an indexable type", typ)
return
}
if len(b) == 0 {
b = []byte{0}
}
return
}
func encodeBasic(v reflect.Value) string {
t := v.Type()
switch k := t.Kind(); k {
case reflect.Bool:
return strconv.FormatBool(v.Bool())
case reflect.Int,
reflect.Int8,
reflect.Int16,
reflect.Int32,
reflect.Int64:
return strconv.FormatInt(v.Int(), 10)
case reflect.Uint,
reflect.Uint8,
reflect.Uint16,
reflect.Uint32,
reflect.Uint64:
return strconv.FormatUint(v.Uint(), 10)
case reflect.Float32:
return strconv.FormatFloat(v.Float(), 'g', -1, 32)
case reflect.Float64:
return strconv.FormatFloat(v.Float(), 'g', -1, 64)
case reflect.Complex64, reflect.Complex128:
s := fmt.Sprintf("%g", v.Complex())
return strings.TrimSuffix(strings.TrimPrefix(s, "("), ")")
case reflect.String:
return v.String()
}
panic(t.String() + " has unsupported kind " + t.Kind().String())
}
func (p *printer) marshalSimple(typ reflect.Type, val reflect.Value) error {
switch val.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
p.WriteString(strconv.FormatInt(val.Int(), 10))
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
p.WriteString(strconv.FormatUint(val.Uint(), 10))
case reflect.Float32, reflect.Float64:
p.WriteString(strconv.FormatFloat(val.Float(), 'g', -1, 64))
case reflect.String:
// TODO: Add EscapeString.
Escape(p, []byte(val.String()))
case reflect.Bool:
p.WriteString(strconv.FormatBool(val.Bool()))
case reflect.Array:
// will be [...]byte
bytes := make([]byte, val.Len())
for i := range bytes {
bytes[i] = val.Index(i).Interface().(byte)
}
Escape(p, bytes)
case reflect.Slice:
// will be []byte
Escape(p, val.Bytes())
default:
return &UnsupportedTypeError{typ}
}
return nil
}
// isZero reports whether the value is the zero of its type.
func isZero(val reflect.Value) bool {
switch val.Kind() {
case reflect.Array:
for i := 0; i < val.Len(); i++ {
if !isZero(val.Index(i)) {
return false
}
}
return true
case reflect.Map, reflect.Slice, reflect.String:
return val.Len() == 0
case reflect.Bool:
return !val.Bool()
case reflect.Complex64, reflect.Complex128:
return val.Complex() == 0
case reflect.Chan, reflect.Func, reflect.Ptr:
return val.IsNil()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return val.Int() == 0
case reflect.Float32, reflect.Float64:
return val.Float() == 0
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return val.Uint() == 0
case reflect.Struct:
for i := 0; i < val.NumField(); i++ {
if !isZero(val.Field(i)) {
return false
}
}
return true
}
panic("unknown type in isZero " + val.Type().String())
}
// valueSortLess returns whether the first value should sort before the second
// value. It is used by valueSorter.Less as part of the sort.Interface
// implementation.
func valueSortLess(a, b reflect.Value) bool {
switch a.Kind() {
case reflect.Bool:
return !a.Bool() && b.Bool()
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
return a.Int() < b.Int()
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
return a.Uint() < b.Uint()
case reflect.Float32, reflect.Float64:
return a.Float() < b.Float()
case reflect.String:
return a.String() < b.String()
case reflect.Uintptr:
return a.Uint() < b.Uint()
case reflect.Array:
// Compare the contents of both arrays.
l := a.Len()
for i := 0; i < l; i++ {
av := a.Index(i)
bv := b.Index(i)
if av.Interface() == bv.Interface() {
continue
}
return valueSortLess(av, bv)
}
}
return a.String() < b.String()
}
func formatValue(value reflect.Value, indentation uint) string {
if indentation > MaxDepth {
return "..."
}
if isNilValue(value) {
return "nil"
}
if UseStringerRepresentation {
if value.CanInterface() {
obj := value.Interface()
switch x := obj.(type) {
case fmt.GoStringer:
return x.GoString()
case fmt.Stringer:
return x.String()
}
}
}
switch value.Kind() {
case reflect.Bool:
return fmt.Sprintf("%v", value.Bool())
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return fmt.Sprintf("%v", value.Int())
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return fmt.Sprintf("%v", value.Uint())
case reflect.Uintptr:
return fmt.Sprintf("0x%x", value.Uint())
case reflect.Float32, reflect.Float64:
return fmt.Sprintf("%v", value.Float())
case reflect.Complex64, reflect.Complex128:
return fmt.Sprintf("%v", value.Complex())
case reflect.Chan:
return fmt.Sprintf("0x%x", value.Pointer())
case reflect.Func:
return fmt.Sprintf("0x%x", value.Pointer())
case reflect.Ptr:
return formatValue(value.Elem(), indentation)
case reflect.Slice:
return formatSlice(value, indentation)
case reflect.String:
return formatString(value.String(), indentation)
case reflect.Array:
return formatSlice(value, indentation)
case reflect.Map:
return formatMap(value, indentation)
case reflect.Struct:
return formatStruct(value, indentation)
case reflect.Interface:
return formatValue(value.Elem(), indentation)
default:
if value.CanInterface() {
return fmt.Sprintf("%#v", value.Interface())
} else {
return fmt.Sprintf("%#v", value)
}
}
}
func refToVal(ref reflect.Value) Value {
switch ref.Kind() {
case reflect.Bool:
return boolValue(ref.Bool())
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return intValue(ref.Int())
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32,
reflect.Uint64, reflect.Uintptr:
return intValue(ref.Uint())
case reflect.Float32, reflect.Float64:
return floatValue(ref.Float())
case reflect.Complex64, reflect.Complex128:
return complexValue(ref.Complex())
case reflect.Array, reflect.Slice:
return arrayValue{reflectValue(ref)}
case reflect.Chan:
return chanValue{reflectValue(ref)}
case reflect.Map:
return mapValue{reflectValue(ref)}
case reflect.Ptr:
return pointerValue{reflectValue(ref)}
case reflect.String:
return stringValue(ref.String())
case reflect.Struct:
return structValue{reflectValue(ref)}
}
return nilValue(0)
}
func plain_extract_value(name string, field reflect.Value) url.Values {
values := make(url.Values)
switch field.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
values.Add(name, strconv.FormatInt(field.Int(), 10))
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
values.Add(name, strconv.FormatUint(field.Uint(), 10))
case reflect.Bool:
values.Add(name, strconv.FormatBool(field.Bool()))
case reflect.Struct:
values = merge(values, plain_extract_struct(field))
case reflect.Slice:
for i := 0; i < field.Len(); i++ {
sv := field.Index(i)
values = merge(values, plain_extract_value(name, sv))
}
case reflect.String:
values.Add(name, field.String())
case reflect.Float32, reflect.Float64:
values.Add(name, strconv.FormatFloat(field.Float(), 'f', -1, 64))
case reflect.Ptr, reflect.Interface:
values = merge(values, plain_extract_pointer(field))
}
return values
}
func (e *Encoder) encodeScalar(av *dynamodb.AttributeValue, v reflect.Value, fieldTag tag) error {
if v.Type() == numberType {
s := v.String()
if fieldTag.AsString {
av.S = &s
} else {
av.N = &s
}
return nil
}
switch v.Kind() {
case reflect.Bool:
av.BOOL = new(bool)
*av.BOOL = v.Bool()
case reflect.String:
if err := e.encodeString(av, v); err != nil {
return err
}
default:
// Fallback to encoding numbers, will return invalid type if not supported
if err := e.encodeNumber(av, v); err != nil {
return err
}
if fieldTag.AsString && av.NULL == nil && av.N != nil {
av.S = av.N
av.N = nil
}
}
return nil
}
// isTrue reports whether the value is 'true', in the sense of not the zero of its type,
// and whether the value has a meaningful truth value.
func isTrue(val reflect.Value) (truth, ok bool) {
if !val.IsValid() {
// Something like var x interface{}, never set. It's a form of nil.
return false, true
}
switch val.Kind() {
case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
truth = val.Len() > 0
case reflect.Bool:
truth = val.Bool()
case reflect.Complex64, reflect.Complex128:
truth = val.Complex() != 0
case reflect.Chan, reflect.Func, reflect.Ptr, reflect.Interface:
truth = !val.IsNil()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
truth = val.Int() != 0
case reflect.Float32, reflect.Float64:
truth = val.Float() != 0
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
truth = val.Uint() != 0
case reflect.Struct:
truth = true // Struct values are always true.
default:
return
}
return truth, true
}
func encode(b []byte, rv reflect.Value) ([]byte, error) {
switch rk := rv.Kind(); rk {
case reflect.Bool:
b = encodeBool(b, rv.Bool())
case reflect.Int, reflect.Int8, reflect.Int64, reflect.Int32, reflect.Int16:
b = encodeInt(b, rv.Int())
case reflect.Uint8, reflect.Uint64, reflect.Uint, reflect.Uint32, reflect.Uint16:
b = encodeInt(b, int64(rv.Uint()))
case reflect.String:
b = encodeString(b, rv.String())
case reflect.Array, reflect.Slice:
if rv.Len() == 0 && rv.Type().Elem().Kind() == reflect.Uint8 {
b = encodeBytes(b, rv.Bytes())
} else if rv.Index(0).Kind() == reflect.Uint8 {
b = encodeBytes(b, rv.Bytes())
} else {
b = encodeArray(b, rv)
}
case reflect.Map:
b = encodeMap(b, rv)
case reflect.Struct:
b = encodeStruct(b, rv)
default:
panic("no support for type")
}
return b, nil
}
func encodeBool(b []byte, v reflect.Value) []byte {
if v.Bool() {
return append(b, 0x12)
} else {
return append(b, 0x11)
}
}
// Returns the string representation of the field value
func (enc *encoder) encodeCol(fv reflect.Value, st reflect.StructTag) string {
switch fv.Kind() {
case reflect.String:
return fv.String()
case reflect.Int, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int8:
return fmt.Sprintf("%v", fv.Int())
case reflect.Float32:
return encodeFloat(32, fv)
case reflect.Float64:
return encodeFloat(64, fv)
case reflect.Bool:
return encodeBool(fv.Bool(), st)
case reflect.Uint, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint8:
return fmt.Sprintf("%v", fv.Uint())
case reflect.Complex64, reflect.Complex128:
return fmt.Sprintf("%+.3g", fv.Complex())
case reflect.Interface:
return encodeInterface(fv, st)
case reflect.Struct:
return encodeInterface(fv, st)
default:
panic(fmt.Sprintf("Unsupported type %s", fv.Kind()))
}
return ""
}
func isZero(v reflect.Value) bool {
switch v.Kind() {
case reflect.String:
return len(v.String()) == 0
case reflect.Interface, reflect.Ptr:
return v.IsNil()
case reflect.Slice:
return v.Len() == 0
case reflect.Map:
return v.Len() == 0
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return v.Int() == 0
case reflect.Float32, reflect.Float64:
return v.Float() == 0
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return v.Uint() == 0
case reflect.Bool:
return !v.Bool()
case reflect.Struct:
vt := v.Type()
for i := v.NumField() - 1; i >= 0; i-- {
if vt.Field(i).PkgPath != "" {
continue // Private field
}
if !isZero(v.Field(i)) {
return false
}
}
return true
}
return false
}
func encodeString(v reflect.Value, opts *Options) string {
switch v.Kind() {
case reflect.String:
return v.String()
case reflect.Bool:
return strconv.FormatBool(v.Bool())
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return strconv.FormatInt(v.Int(), 10)
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return strconv.FormatUint(v.Uint(), 10)
case reflect.Float32, reflect.Float64:
return strconv.FormatFloat(v.Float(), 'f', -1, v.Type().Bits())
case reflect.Slice:
l := v.Len()
vals := make([]string, l)
for i := 0; i < l; i++ {
sv := v.Index(i)
vals[i] = encodeString(sv, opts)
}
return strings.Join(vals, opts.SliceSeparator)
}
panic("EncodeString unsupported val kind " + v.Kind().String())
}