Refactor for more flexibility
* Move from gcfg to toml configuration because gcfg was too restrictive * Implemented gateway which has support multiple in and out bridges. * Allow for bridging the same bridges, which means eg you can now bridge between multiple mattermosts. * Support multiple gateways
This commit is contained in:
Wim
509
vendor/github.com/BurntSushi/toml/decode.go
generated
vendored
Normal file
509
vendor/github.com/BurntSushi/toml/decode.go
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vendored
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@@ -0,0 +1,509 @@
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package toml
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import (
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"fmt"
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"io"
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"io/ioutil"
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"math"
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"reflect"
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"strings"
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"time"
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)
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func e(format string, args ...interface{}) error {
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return fmt.Errorf("toml: "+format, args...)
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}
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// Unmarshaler is the interface implemented by objects that can unmarshal a
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// TOML description of themselves.
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type Unmarshaler interface {
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UnmarshalTOML(interface{}) error
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}
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// Unmarshal decodes the contents of `p` in TOML format into a pointer `v`.
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func Unmarshal(p []byte, v interface{}) error {
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_, err := Decode(string(p), v)
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return err
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}
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// Primitive is a TOML value that hasn't been decoded into a Go value.
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// When using the various `Decode*` functions, the type `Primitive` may
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// be given to any value, and its decoding will be delayed.
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//
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// A `Primitive` value can be decoded using the `PrimitiveDecode` function.
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//
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// The underlying representation of a `Primitive` value is subject to change.
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// Do not rely on it.
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//
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// N.B. Primitive values are still parsed, so using them will only avoid
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// the overhead of reflection. They can be useful when you don't know the
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// exact type of TOML data until run time.
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type Primitive struct {
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undecoded interface{}
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context Key
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}
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// DEPRECATED!
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//
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// Use MetaData.PrimitiveDecode instead.
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func PrimitiveDecode(primValue Primitive, v interface{}) error {
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md := MetaData{decoded: make(map[string]bool)}
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return md.unify(primValue.undecoded, rvalue(v))
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}
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// PrimitiveDecode is just like the other `Decode*` functions, except it
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// decodes a TOML value that has already been parsed. Valid primitive values
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// can *only* be obtained from values filled by the decoder functions,
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// including this method. (i.e., `v` may contain more `Primitive`
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// values.)
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//
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// Meta data for primitive values is included in the meta data returned by
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// the `Decode*` functions with one exception: keys returned by the Undecoded
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// method will only reflect keys that were decoded. Namely, any keys hidden
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// behind a Primitive will be considered undecoded. Executing this method will
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// update the undecoded keys in the meta data. (See the example.)
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func (md *MetaData) PrimitiveDecode(primValue Primitive, v interface{}) error {
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md.context = primValue.context
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defer func() { md.context = nil }()
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return md.unify(primValue.undecoded, rvalue(v))
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}
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// Decode will decode the contents of `data` in TOML format into a pointer
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// `v`.
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//
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// TOML hashes correspond to Go structs or maps. (Dealer's choice. They can be
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// used interchangeably.)
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//
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// TOML arrays of tables correspond to either a slice of structs or a slice
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// of maps.
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//
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// TOML datetimes correspond to Go `time.Time` values.
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//
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// All other TOML types (float, string, int, bool and array) correspond
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// to the obvious Go types.
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//
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// An exception to the above rules is if a type implements the
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// encoding.TextUnmarshaler interface. In this case, any primitive TOML value
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// (floats, strings, integers, booleans and datetimes) will be converted to
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// a byte string and given to the value's UnmarshalText method. See the
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// Unmarshaler example for a demonstration with time duration strings.
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//
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// Key mapping
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//
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// TOML keys can map to either keys in a Go map or field names in a Go
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// struct. The special `toml` struct tag may be used to map TOML keys to
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// struct fields that don't match the key name exactly. (See the example.)
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// A case insensitive match to struct names will be tried if an exact match
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// can't be found.
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//
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// The mapping between TOML values and Go values is loose. That is, there
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// may exist TOML values that cannot be placed into your representation, and
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// there may be parts of your representation that do not correspond to
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// TOML values. This loose mapping can be made stricter by using the IsDefined
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// and/or Undecoded methods on the MetaData returned.
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//
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// This decoder will not handle cyclic types. If a cyclic type is passed,
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// `Decode` will not terminate.
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func Decode(data string, v interface{}) (MetaData, error) {
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rv := reflect.ValueOf(v)
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if rv.Kind() != reflect.Ptr {
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return MetaData{}, e("Decode of non-pointer %s", reflect.TypeOf(v))
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}
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if rv.IsNil() {
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return MetaData{}, e("Decode of nil %s", reflect.TypeOf(v))
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}
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p, err := parse(data)
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if err != nil {
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return MetaData{}, err
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}
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md := MetaData{
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p.mapping, p.types, p.ordered,
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make(map[string]bool, len(p.ordered)), nil,
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}
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return md, md.unify(p.mapping, indirect(rv))
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}
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// DecodeFile is just like Decode, except it will automatically read the
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// contents of the file at `fpath` and decode it for you.
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func DecodeFile(fpath string, v interface{}) (MetaData, error) {
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bs, err := ioutil.ReadFile(fpath)
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if err != nil {
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return MetaData{}, err
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}
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return Decode(string(bs), v)
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}
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// DecodeReader is just like Decode, except it will consume all bytes
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// from the reader and decode it for you.
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func DecodeReader(r io.Reader, v interface{}) (MetaData, error) {
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bs, err := ioutil.ReadAll(r)
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if err != nil {
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return MetaData{}, err
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}
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return Decode(string(bs), v)
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}
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// unify performs a sort of type unification based on the structure of `rv`,
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// which is the client representation.
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//
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// Any type mismatch produces an error. Finding a type that we don't know
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// how to handle produces an unsupported type error.
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func (md *MetaData) unify(data interface{}, rv reflect.Value) error {
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// Special case. Look for a `Primitive` value.
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if rv.Type() == reflect.TypeOf((*Primitive)(nil)).Elem() {
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// Save the undecoded data and the key context into the primitive
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// value.
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context := make(Key, len(md.context))
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copy(context, md.context)
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rv.Set(reflect.ValueOf(Primitive{
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undecoded: data,
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context: context,
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}))
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return nil
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}
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// Special case. Unmarshaler Interface support.
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if rv.CanAddr() {
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if v, ok := rv.Addr().Interface().(Unmarshaler); ok {
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return v.UnmarshalTOML(data)
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}
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}
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// Special case. Handle time.Time values specifically.
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// TODO: Remove this code when we decide to drop support for Go 1.1.
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// This isn't necessary in Go 1.2 because time.Time satisfies the encoding
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// interfaces.
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if rv.Type().AssignableTo(rvalue(time.Time{}).Type()) {
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return md.unifyDatetime(data, rv)
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}
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// Special case. Look for a value satisfying the TextUnmarshaler interface.
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if v, ok := rv.Interface().(TextUnmarshaler); ok {
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return md.unifyText(data, v)
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}
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// BUG(burntsushi)
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// The behavior here is incorrect whenever a Go type satisfies the
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// encoding.TextUnmarshaler interface but also corresponds to a TOML
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// hash or array. In particular, the unmarshaler should only be applied
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// to primitive TOML values. But at this point, it will be applied to
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// all kinds of values and produce an incorrect error whenever those values
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// are hashes or arrays (including arrays of tables).
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k := rv.Kind()
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// laziness
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if k >= reflect.Int && k <= reflect.Uint64 {
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return md.unifyInt(data, rv)
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}
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switch k {
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case reflect.Ptr:
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elem := reflect.New(rv.Type().Elem())
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err := md.unify(data, reflect.Indirect(elem))
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if err != nil {
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return err
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}
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rv.Set(elem)
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return nil
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case reflect.Struct:
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return md.unifyStruct(data, rv)
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case reflect.Map:
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return md.unifyMap(data, rv)
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case reflect.Array:
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return md.unifyArray(data, rv)
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case reflect.Slice:
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return md.unifySlice(data, rv)
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case reflect.String:
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return md.unifyString(data, rv)
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case reflect.Bool:
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return md.unifyBool(data, rv)
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case reflect.Interface:
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// we only support empty interfaces.
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if rv.NumMethod() > 0 {
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return e("unsupported type %s", rv.Type())
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}
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return md.unifyAnything(data, rv)
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case reflect.Float32:
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fallthrough
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case reflect.Float64:
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return md.unifyFloat64(data, rv)
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}
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return e("unsupported type %s", rv.Kind())
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}
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func (md *MetaData) unifyStruct(mapping interface{}, rv reflect.Value) error {
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tmap, ok := mapping.(map[string]interface{})
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if !ok {
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if mapping == nil {
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return nil
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}
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return e("type mismatch for %s: expected table but found %T",
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rv.Type().String(), mapping)
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}
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for key, datum := range tmap {
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var f *field
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fields := cachedTypeFields(rv.Type())
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for i := range fields {
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ff := &fields[i]
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if ff.name == key {
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f = ff
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break
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}
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if f == nil && strings.EqualFold(ff.name, key) {
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f = ff
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}
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}
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if f != nil {
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subv := rv
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for _, i := range f.index {
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subv = indirect(subv.Field(i))
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}
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if isUnifiable(subv) {
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md.decoded[md.context.add(key).String()] = true
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md.context = append(md.context, key)
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if err := md.unify(datum, subv); err != nil {
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return err
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}
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md.context = md.context[0 : len(md.context)-1]
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} else if f.name != "" {
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// Bad user! No soup for you!
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return e("cannot write unexported field %s.%s",
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rv.Type().String(), f.name)
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}
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}
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}
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return nil
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}
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func (md *MetaData) unifyMap(mapping interface{}, rv reflect.Value) error {
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tmap, ok := mapping.(map[string]interface{})
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if !ok {
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if tmap == nil {
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return nil
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}
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return badtype("map", mapping)
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}
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if rv.IsNil() {
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rv.Set(reflect.MakeMap(rv.Type()))
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}
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for k, v := range tmap {
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md.decoded[md.context.add(k).String()] = true
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md.context = append(md.context, k)
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rvkey := indirect(reflect.New(rv.Type().Key()))
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rvval := reflect.Indirect(reflect.New(rv.Type().Elem()))
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if err := md.unify(v, rvval); err != nil {
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return err
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}
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md.context = md.context[0 : len(md.context)-1]
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rvkey.SetString(k)
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rv.SetMapIndex(rvkey, rvval)
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}
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||||
return nil
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}
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|
||||
func (md *MetaData) unifyArray(data interface{}, rv reflect.Value) error {
|
||||
datav := reflect.ValueOf(data)
|
||||
if datav.Kind() != reflect.Slice {
|
||||
if !datav.IsValid() {
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||||
return nil
|
||||
}
|
||||
return badtype("slice", data)
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||||
}
|
||||
sliceLen := datav.Len()
|
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if sliceLen != rv.Len() {
|
||||
return e("expected array length %d; got TOML array of length %d",
|
||||
rv.Len(), sliceLen)
|
||||
}
|
||||
return md.unifySliceArray(datav, rv)
|
||||
}
|
||||
|
||||
func (md *MetaData) unifySlice(data interface{}, rv reflect.Value) error {
|
||||
datav := reflect.ValueOf(data)
|
||||
if datav.Kind() != reflect.Slice {
|
||||
if !datav.IsValid() {
|
||||
return nil
|
||||
}
|
||||
return badtype("slice", data)
|
||||
}
|
||||
n := datav.Len()
|
||||
if rv.IsNil() || rv.Cap() < n {
|
||||
rv.Set(reflect.MakeSlice(rv.Type(), n, n))
|
||||
}
|
||||
rv.SetLen(n)
|
||||
return md.unifySliceArray(datav, rv)
|
||||
}
|
||||
|
||||
func (md *MetaData) unifySliceArray(data, rv reflect.Value) error {
|
||||
sliceLen := data.Len()
|
||||
for i := 0; i < sliceLen; i++ {
|
||||
v := data.Index(i).Interface()
|
||||
sliceval := indirect(rv.Index(i))
|
||||
if err := md.unify(v, sliceval); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (md *MetaData) unifyDatetime(data interface{}, rv reflect.Value) error {
|
||||
if _, ok := data.(time.Time); ok {
|
||||
rv.Set(reflect.ValueOf(data))
|
||||
return nil
|
||||
}
|
||||
return badtype("time.Time", data)
|
||||
}
|
||||
|
||||
func (md *MetaData) unifyString(data interface{}, rv reflect.Value) error {
|
||||
if s, ok := data.(string); ok {
|
||||
rv.SetString(s)
|
||||
return nil
|
||||
}
|
||||
return badtype("string", data)
|
||||
}
|
||||
|
||||
func (md *MetaData) unifyFloat64(data interface{}, rv reflect.Value) error {
|
||||
if num, ok := data.(float64); ok {
|
||||
switch rv.Kind() {
|
||||
case reflect.Float32:
|
||||
fallthrough
|
||||
case reflect.Float64:
|
||||
rv.SetFloat(num)
|
||||
default:
|
||||
panic("bug")
|
||||
}
|
||||
return nil
|
||||
}
|
||||
return badtype("float", data)
|
||||
}
|
||||
|
||||
func (md *MetaData) unifyInt(data interface{}, rv reflect.Value) error {
|
||||
if num, ok := data.(int64); ok {
|
||||
if rv.Kind() >= reflect.Int && rv.Kind() <= reflect.Int64 {
|
||||
switch rv.Kind() {
|
||||
case reflect.Int, reflect.Int64:
|
||||
// No bounds checking necessary.
|
||||
case reflect.Int8:
|
||||
if num < math.MinInt8 || num > math.MaxInt8 {
|
||||
return e("value %d is out of range for int8", num)
|
||||
}
|
||||
case reflect.Int16:
|
||||
if num < math.MinInt16 || num > math.MaxInt16 {
|
||||
return e("value %d is out of range for int16", num)
|
||||
}
|
||||
case reflect.Int32:
|
||||
if num < math.MinInt32 || num > math.MaxInt32 {
|
||||
return e("value %d is out of range for int32", num)
|
||||
}
|
||||
}
|
||||
rv.SetInt(num)
|
||||
} else if rv.Kind() >= reflect.Uint && rv.Kind() <= reflect.Uint64 {
|
||||
unum := uint64(num)
|
||||
switch rv.Kind() {
|
||||
case reflect.Uint, reflect.Uint64:
|
||||
// No bounds checking necessary.
|
||||
case reflect.Uint8:
|
||||
if num < 0 || unum > math.MaxUint8 {
|
||||
return e("value %d is out of range for uint8", num)
|
||||
}
|
||||
case reflect.Uint16:
|
||||
if num < 0 || unum > math.MaxUint16 {
|
||||
return e("value %d is out of range for uint16", num)
|
||||
}
|
||||
case reflect.Uint32:
|
||||
if num < 0 || unum > math.MaxUint32 {
|
||||
return e("value %d is out of range for uint32", num)
|
||||
}
|
||||
}
|
||||
rv.SetUint(unum)
|
||||
} else {
|
||||
panic("unreachable")
|
||||
}
|
||||
return nil
|
||||
}
|
||||
return badtype("integer", data)
|
||||
}
|
||||
|
||||
func (md *MetaData) unifyBool(data interface{}, rv reflect.Value) error {
|
||||
if b, ok := data.(bool); ok {
|
||||
rv.SetBool(b)
|
||||
return nil
|
||||
}
|
||||
return badtype("boolean", data)
|
||||
}
|
||||
|
||||
func (md *MetaData) unifyAnything(data interface{}, rv reflect.Value) error {
|
||||
rv.Set(reflect.ValueOf(data))
|
||||
return nil
|
||||
}
|
||||
|
||||
func (md *MetaData) unifyText(data interface{}, v TextUnmarshaler) error {
|
||||
var s string
|
||||
switch sdata := data.(type) {
|
||||
case TextMarshaler:
|
||||
text, err := sdata.MarshalText()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
s = string(text)
|
||||
case fmt.Stringer:
|
||||
s = sdata.String()
|
||||
case string:
|
||||
s = sdata
|
||||
case bool:
|
||||
s = fmt.Sprintf("%v", sdata)
|
||||
case int64:
|
||||
s = fmt.Sprintf("%d", sdata)
|
||||
case float64:
|
||||
s = fmt.Sprintf("%f", sdata)
|
||||
default:
|
||||
return badtype("primitive (string-like)", data)
|
||||
}
|
||||
if err := v.UnmarshalText([]byte(s)); err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// rvalue returns a reflect.Value of `v`. All pointers are resolved.
|
||||
func rvalue(v interface{}) reflect.Value {
|
||||
return indirect(reflect.ValueOf(v))
|
||||
}
|
||||
|
||||
// indirect returns the value pointed to by a pointer.
|
||||
// Pointers are followed until the value is not a pointer.
|
||||
// New values are allocated for each nil pointer.
|
||||
//
|
||||
// An exception to this rule is if the value satisfies an interface of
|
||||
// interest to us (like encoding.TextUnmarshaler).
|
||||
func indirect(v reflect.Value) reflect.Value {
|
||||
if v.Kind() != reflect.Ptr {
|
||||
if v.CanSet() {
|
||||
pv := v.Addr()
|
||||
if _, ok := pv.Interface().(TextUnmarshaler); ok {
|
||||
return pv
|
||||
}
|
||||
}
|
||||
return v
|
||||
}
|
||||
if v.IsNil() {
|
||||
v.Set(reflect.New(v.Type().Elem()))
|
||||
}
|
||||
return indirect(reflect.Indirect(v))
|
||||
}
|
||||
|
||||
func isUnifiable(rv reflect.Value) bool {
|
||||
if rv.CanSet() {
|
||||
return true
|
||||
}
|
||||
if _, ok := rv.Interface().(TextUnmarshaler); ok {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func badtype(expected string, data interface{}) error {
|
||||
return e("cannot load TOML value of type %T into a Go %s", data, expected)
|
||||
}
|
||||
Reference in New Issue
Block a user