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// Copyright (C) 2022 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package json
import (
"bufio"
"bytes"
"encoding/json"
"errors"
"io"
"strconv"
"git.lukeshu.com/go/lowmemjson"
)
type (
Number = json.Number
Marshaler = json.Marshaler
RawMessage = json.RawMessage
// low-level decode errors
//SyntaxError = lowmemjson.DecodeSyntaxError // expose a field
UnmarshalFieldError = json.UnmarshalFieldError
UnmarshalTypeError = json.UnmarshalTypeError // lowmemjson.DecodeTypeError
// high-level decode errors
InvalidUnmarshalError = json.InvalidUnmarshalError // lowmemjson.DecodeArgumentError
// marshal errors
InvalidUTF8Error = json.InvalidUTF8Error
MarshalerError = lowmemjson.EncodeMethodError // expose a field
UnsupportedTypeError = json.UnsupportedTypeError
UnsupportedValueError = json.UnsupportedValueError
)
/////////////////////////////////////////////////////////////////////
func MarshalIndent(v any, prefix, indent string) ([]byte, error) {
var buf bytes.Buffer
formatter := &lowmemjson.ReEncoder{
Out: &buf,
Indent: indent,
Prefix: prefix,
}
err := lowmemjson.Encode(formatter, v)
return buf.Bytes(), err
}
func Marshal(v any) ([]byte, error) {
var buf bytes.Buffer
formatter := &lowmemjson.ReEncoder{
Out: &buf,
Compact: true,
}
err := lowmemjson.Encode(formatter, v)
return buf.Bytes(), err
}
func HTMLEscape(dst *bytes.Buffer, src []byte) {
formatter := &lowmemjson.ReEncoder{
Out: dst,
}
_, _ = formatter.Write(src)
}
func Compact(dst *bytes.Buffer, src []byte) error {
formatter := &lowmemjson.ReEncoder{
Out: dst,
Compact: true,
}
_, err := formatter.Write(src)
return err
}
func Indent(dst *bytes.Buffer, src []byte, prefix, indent string) error {
formatter := &lowmemjson.ReEncoder{
Out: dst,
Indent: indent,
Prefix: prefix,
}
_, err := formatter.Write(src)
return err
}
func Valid(data []byte) bool {
formatter := &lowmemjson.ReEncoder{
Out: io.Discard,
Compact: true,
}
_, err := formatter.Write(data)
return err == nil
}
func Unmarshal(data []byte, ptr any) error {
return NewDecoder(bytes.NewReader(data)).Decode(ptr)
}
/////////////////////////////////////////////////////////////////////
type Decoder struct {
*lowmemjson.Decoder
buf *bufio.Reader
}
func NewDecoder(r io.Reader) *Decoder {
br, ok := r.(*bufio.Reader)
if !ok {
br = bufio.NewReader(r)
}
return &Decoder{
Decoder: lowmemjson.NewDecoder(br),
buf: br,
}
}
func (dec *Decoder) Decode(ptr any) error {
err := dec.Decoder.Decode(ptr)
if derr, ok := err.(*lowmemjson.DecodeError); ok {
switch terr := derr.Err.(type) {
case *lowmemjson.DecodeSyntaxError:
err = &SyntaxError{
msg: terr.Err.Error(),
Offset: terr.Offset,
}
case *lowmemjson.DecodeTypeError:
if typeErr, ok := terr.Err.(*json.UnmarshalTypeError); ok {
err = &UnmarshalTypeError{
Value: typeErr.Value,
Type: typeErr.Type,
Offset: typeErr.Offset,
Struct: derr.FieldParent,
Field: derr.FieldName,
}
} else if _, isArgErr := terr.Err.(*lowmemjson.DecodeArgumentError); terr.Err != nil &&
!isArgErr &&
!errors.Is(terr.Err, strconv.ErrSyntax) &&
!errors.Is(terr.Err, strconv.ErrRange) {
err = terr.Err
} else {
err = &UnmarshalTypeError{
Value: terr.JSONType,
Type: terr.GoType,
Offset: terr.Offset,
Struct: derr.FieldParent,
Field: derr.FieldName,
}
}
}
}
return err
}
func (dec *Decoder) Buffered() io.Reader {
dat, _ := dec.buf.Peek(dec.buf.Buffered())
return bytes.NewReader(dat)
}
//func (dec *Decoder) Token() (Token, error)
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