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Diffstat (limited to 'vendor/github.com/goccy/go-json/json.go')
| -rw-r--r-- | vendor/github.com/goccy/go-json/json.go | 371 |
1 files changed, 371 insertions, 0 deletions
diff --git a/vendor/github.com/goccy/go-json/json.go b/vendor/github.com/goccy/go-json/json.go new file mode 100644 index 000000000..413cb20bf --- /dev/null +++ b/vendor/github.com/goccy/go-json/json.go @@ -0,0 +1,371 @@ +package json + +import ( + "bytes" + "context" + "encoding/json" + + "github.com/goccy/go-json/internal/encoder" +) + +// Marshaler is the interface implemented by types that +// can marshal themselves into valid JSON. +type Marshaler interface { + MarshalJSON() ([]byte, error) +} + +// MarshalerContext is the interface implemented by types that +// can marshal themselves into valid JSON with context.Context. +type MarshalerContext interface { + MarshalJSON(context.Context) ([]byte, error) +} + +// Unmarshaler is the interface implemented by types +// that can unmarshal a JSON description of themselves. +// The input can be assumed to be a valid encoding of +// a JSON value. UnmarshalJSON must copy the JSON data +// if it wishes to retain the data after returning. +// +// By convention, to approximate the behavior of Unmarshal itself, +// Unmarshalers implement UnmarshalJSON([]byte("null")) as a no-op. +type Unmarshaler interface { + UnmarshalJSON([]byte) error +} + +// UnmarshalerContext is the interface implemented by types +// that can unmarshal with context.Context a JSON description of themselves. +type UnmarshalerContext interface { + UnmarshalJSON(context.Context, []byte) error +} + +// Marshal returns the JSON encoding of v. +// +// Marshal traverses the value v recursively. +// If an encountered value implements the Marshaler interface +// and is not a nil pointer, Marshal calls its MarshalJSON method +// to produce JSON. If no MarshalJSON method is present but the +// value implements encoding.TextMarshaler instead, Marshal calls +// its MarshalText method and encodes the result as a JSON string. +// The nil pointer exception is not strictly necessary +// but mimics a similar, necessary exception in the behavior of +// UnmarshalJSON. +// +// Otherwise, Marshal uses the following type-dependent default encodings: +// +// Boolean values encode as JSON booleans. +// +// Floating point, integer, and Number values encode as JSON numbers. +// +// String values encode as JSON strings coerced to valid UTF-8, +// replacing invalid bytes with the Unicode replacement rune. +// The angle brackets "<" and ">" are escaped to "\u003c" and "\u003e" +// to keep some browsers from misinterpreting JSON output as HTML. +// Ampersand "&" is also escaped to "\u0026" for the same reason. +// This escaping can be disabled using an Encoder that had SetEscapeHTML(false) +// called on it. +// +// Array and slice values encode as JSON arrays, except that +// []byte encodes as a base64-encoded string, and a nil slice +// encodes as the null JSON value. +// +// Struct values encode as JSON objects. +// Each exported struct field becomes a member of the object, using the +// field name as the object key, unless the field is omitted for one of the +// reasons given below. +// +// The encoding of each struct field can be customized by the format string +// stored under the "json" key in the struct field's tag. +// The format string gives the name of the field, possibly followed by a +// comma-separated list of options. The name may be empty in order to +// specify options without overriding the default field name. +// +// The "omitempty" option specifies that the field should be omitted +// from the encoding if the field has an empty value, defined as +// false, 0, a nil pointer, a nil interface value, and any empty array, +// slice, map, or string. +// +// As a special case, if the field tag is "-", the field is always omitted. +// Note that a field with name "-" can still be generated using the tag "-,". +// +// Examples of struct field tags and their meanings: +// +// // Field appears in JSON as key "myName". +// Field int `json:"myName"` +// +// // Field appears in JSON as key "myName" and +// // the field is omitted from the object if its value is empty, +// // as defined above. +// Field int `json:"myName,omitempty"` +// +// // Field appears in JSON as key "Field" (the default), but +// // the field is skipped if empty. +// // Note the leading comma. +// Field int `json:",omitempty"` +// +// // Field is ignored by this package. +// Field int `json:"-"` +// +// // Field appears in JSON as key "-". +// Field int `json:"-,"` +// +// The "string" option signals that a field is stored as JSON inside a +// JSON-encoded string. It applies only to fields of string, floating point, +// integer, or boolean types. This extra level of encoding is sometimes used +// when communicating with JavaScript programs: +// +// Int64String int64 `json:",string"` +// +// The key name will be used if it's a non-empty string consisting of +// only Unicode letters, digits, and ASCII punctuation except quotation +// marks, backslash, and comma. +// +// Anonymous struct fields are usually marshaled as if their inner exported fields +// were fields in the outer struct, subject to the usual Go visibility rules amended +// as described in the next paragraph. +// An anonymous struct field with a name given in its JSON tag is treated as +// having that name, rather than being anonymous. +// An anonymous struct field of interface type is treated the same as having +// that type as its name, rather than being anonymous. +// +// The Go visibility rules for struct fields are amended for JSON when +// deciding which field to marshal or unmarshal. If there are +// multiple fields at the same level, and that level is the least +// nested (and would therefore be the nesting level selected by the +// usual Go rules), the following extra rules apply: +// +// 1) Of those fields, if any are JSON-tagged, only tagged fields are considered, +// even if there are multiple untagged fields that would otherwise conflict. +// +// 2) If there is exactly one field (tagged or not according to the first rule), that is selected. +// +// 3) Otherwise there are multiple fields, and all are ignored; no error occurs. +// +// Handling of anonymous struct fields is new in Go 1.1. +// Prior to Go 1.1, anonymous struct fields were ignored. To force ignoring of +// an anonymous struct field in both current and earlier versions, give the field +// a JSON tag of "-". +// +// Map values encode as JSON objects. The map's key type must either be a +// string, an integer type, or implement encoding.TextMarshaler. The map keys +// are sorted and used as JSON object keys by applying the following rules, +// subject to the UTF-8 coercion described for string values above: +// - string keys are used directly +// - encoding.TextMarshalers are marshaled +// - integer keys are converted to strings +// +// Pointer values encode as the value pointed to. +// A nil pointer encodes as the null JSON value. +// +// Interface values encode as the value contained in the interface. +// A nil interface value encodes as the null JSON value. +// +// Channel, complex, and function values cannot be encoded in JSON. +// Attempting to encode such a value causes Marshal to return +// an UnsupportedTypeError. +// +// JSON cannot represent cyclic data structures and Marshal does not +// handle them. Passing cyclic structures to Marshal will result in +// an infinite recursion. +// +func Marshal(v interface{}) ([]byte, error) { + return MarshalWithOption(v) +} + +// MarshalNoEscape returns the JSON encoding of v and doesn't escape v. +func MarshalNoEscape(v interface{}) ([]byte, error) { + return marshalNoEscape(v) +} + +// MarshalContext returns the JSON encoding of v with context.Context and EncodeOption. +func MarshalContext(ctx context.Context, v interface{}, optFuncs ...EncodeOptionFunc) ([]byte, error) { + return marshalContext(ctx, v, optFuncs...) +} + +// MarshalWithOption returns the JSON encoding of v with EncodeOption. +func MarshalWithOption(v interface{}, optFuncs ...EncodeOptionFunc) ([]byte, error) { + return marshal(v, optFuncs...) +} + +// MarshalIndent is like Marshal but applies Indent to format the output. +// Each JSON element in the output will begin on a new line beginning with prefix +// followed by one or more copies of indent according to the indentation nesting. +func MarshalIndent(v interface{}, prefix, indent string) ([]byte, error) { + return MarshalIndentWithOption(v, prefix, indent) +} + +// MarshalIndentWithOption is like Marshal but applies Indent to format the output with EncodeOption. +func MarshalIndentWithOption(v interface{}, prefix, indent string, optFuncs ...EncodeOptionFunc) ([]byte, error) { + return marshalIndent(v, prefix, indent, optFuncs...) +} + +// Unmarshal parses the JSON-encoded data and stores the result +// in the value pointed to by v. If v is nil or not a pointer, +// Unmarshal returns an InvalidUnmarshalError. +// +// Unmarshal uses the inverse of the encodings that +// Marshal uses, allocating maps, slices, and pointers as necessary, +// with the following additional rules: +// +// To unmarshal JSON into a pointer, Unmarshal first handles the case of +// the JSON being the JSON literal null. In that case, Unmarshal sets +// the pointer to nil. Otherwise, Unmarshal unmarshals the JSON into +// the value pointed at by the pointer. If the pointer is nil, Unmarshal +// allocates a new value for it to point to. +// +// To unmarshal JSON into a value implementing the Unmarshaler interface, +// Unmarshal calls that value's UnmarshalJSON method, including +// when the input is a JSON null. +// Otherwise, if the value implements encoding.TextUnmarshaler +// and the input is a JSON quoted string, Unmarshal calls that value's +// UnmarshalText method with the unquoted form of the string. +// +// To unmarshal JSON into a struct, Unmarshal matches incoming object +// keys to the keys used by Marshal (either the struct field name or its tag), +// preferring an exact match but also accepting a case-insensitive match. By +// default, object keys which don't have a corresponding struct field are +// ignored (see Decoder.DisallowUnknownFields for an alternative). +// +// To unmarshal JSON into an interface value, +// Unmarshal stores one of these in the interface value: +// +// 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 +// +// To unmarshal a JSON array into a slice, Unmarshal resets the slice length +// to zero and then appends each element to the slice. +// As a special case, to unmarshal an empty JSON array into a slice, +// Unmarshal replaces the slice with a new empty slice. +// +// To unmarshal a JSON array into a Go array, Unmarshal decodes +// JSON array elements into corresponding Go array elements. +// If the Go array is smaller than the JSON array, +// the additional JSON array elements are discarded. +// If the JSON array is smaller than the Go array, +// the additional Go array elements are set to zero values. +// +// To unmarshal a JSON object into a map, Unmarshal first establishes a map to +// use. If the map is nil, Unmarshal allocates a new map. Otherwise Unmarshal +// reuses the existing map, keeping existing entries. Unmarshal then stores +// key-value pairs from the JSON object into the map. The map's key type must +// either be any string type, an integer, implement json.Unmarshaler, or +// implement encoding.TextUnmarshaler. +// +// 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 unmarshaling as best it can. +// If no more serious errors are encountered, Unmarshal returns +// an UnmarshalTypeError describing the earliest such error. In any +// case, it's not guaranteed that all the remaining fields following +// the problematic one will be unmarshaled into the target object. +// +// The JSON null value unmarshals into an interface, map, pointer, or slice +// by setting that Go value to nil. Because null is often used in JSON to mean +// ``not present,'' unmarshaling a JSON null into any other Go type has no effect +// on the value and produces no error. +// +// When unmarshaling quoted strings, invalid UTF-8 or +// invalid UTF-16 surrogate pairs are not treated as an error. +// Instead, they are replaced by the Unicode replacement +// character U+FFFD. +// +func Unmarshal(data []byte, v interface{}) error { + return unmarshal(data, v) +} + +// UnmarshalContext parses the JSON-encoded data and stores the result +// in the value pointed to by v. If you implement the UnmarshalerContext interface, +// call it with ctx as an argument. +func UnmarshalContext(ctx context.Context, data []byte, v interface{}, optFuncs ...DecodeOptionFunc) error { + return unmarshalContext(ctx, data, v) +} + +func UnmarshalWithOption(data []byte, v interface{}, optFuncs ...DecodeOptionFunc) error { + return unmarshal(data, v, optFuncs...) +} + +func UnmarshalNoEscape(data []byte, v interface{}, optFuncs ...DecodeOptionFunc) error { + return unmarshalNoEscape(data, v, optFuncs...) +} + +// A Token holds a value of one of these types: +// +// Delim, for the four JSON delimiters [ ] { } +// bool, for JSON booleans +// float64, for JSON numbers +// Number, for JSON numbers +// string, for JSON string literals +// nil, for JSON null +// +type Token = json.Token + +// A Number represents a JSON number literal. +type Number = json.Number + +// RawMessage is a raw encoded JSON value. +// It implements Marshaler and Unmarshaler and can +// be used to delay JSON decoding or precompute a JSON encoding. +type RawMessage = json.RawMessage + +// A Delim is a JSON array or object delimiter, one of [ ] { or }. +type Delim = json.Delim + +// Compact appends to dst the JSON-encoded src with +// insignificant space characters elided. +func Compact(dst *bytes.Buffer, src []byte) error { + return encoder.Compact(dst, src, false) +} + +// Indent appends to dst an indented form of the JSON-encoded src. +// Each element in a JSON object or array begins on a new, +// indented line beginning with prefix followed by one or more +// copies of indent according to the indentation nesting. +// The data appended to dst does not begin with the prefix nor +// any indentation, to make it easier to embed inside other formatted JSON data. +// Although leading space characters (space, tab, carriage return, newline) +// at the beginning of src are dropped, trailing space characters +// at the end of src are preserved and copied to dst. +// For example, if src has no trailing spaces, neither will dst; +// if src ends in a trailing newline, so will dst. +func Indent(dst *bytes.Buffer, src []byte, prefix, indent string) error { + return encoder.Indent(dst, src, prefix, indent) +} + +// HTMLEscape appends to dst the JSON-encoded src with <, >, &, U+2028 and U+2029 +// characters inside string literals changed to \u003c, \u003e, \u0026, \u2028, \u2029 +// so that the JSON will be safe to embed inside HTML <script> tags. +// For historical reasons, web browsers don't honor standard HTML +// escaping within <script> tags, so an alternative JSON encoding must +// be used. +func HTMLEscape(dst *bytes.Buffer, src []byte) { + var v interface{} + dec := NewDecoder(bytes.NewBuffer(src)) + dec.UseNumber() + if err := dec.Decode(&v); err != nil { + return + } + buf, _ := marshal(v) + dst.Write(buf) +} + +// Valid reports whether data is a valid JSON encoding. +func Valid(data []byte) bool { + var v interface{} + decoder := NewDecoder(bytes.NewReader(data)) + err := decoder.Decode(&v) + if err != nil { + return false + } + if !decoder.More() { + return true + } + return decoder.InputOffset() >= int64(len(data)) +} + +func init() { + encoder.Marshal = Marshal + encoder.Unmarshal = Unmarshal +} |