diff options
Diffstat (limited to 'vendor/golang.org/x/exp/slog/text_handler.go')
| -rw-r--r-- | vendor/golang.org/x/exp/slog/text_handler.go | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/vendor/golang.org/x/exp/slog/text_handler.go b/vendor/golang.org/x/exp/slog/text_handler.go deleted file mode 100644 index 75b66b716..000000000 --- a/vendor/golang.org/x/exp/slog/text_handler.go +++ /dev/null @@ -1,161 +0,0 @@ -// Copyright 2022 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. - -package slog - -import ( - "context" - "encoding" - "fmt" - "io" - "reflect" - "strconv" - "unicode" - "unicode/utf8" -) - -// TextHandler is a Handler that writes Records to an io.Writer as a -// sequence of key=value pairs separated by spaces and followed by a newline. -type TextHandler struct { - *commonHandler -} - -// NewTextHandler creates a TextHandler that writes to w, -// using the given options. -// If opts is nil, the default options are used. -func NewTextHandler(w io.Writer, opts *HandlerOptions) *TextHandler { - if opts == nil { - opts = &HandlerOptions{} - } - return &TextHandler{ - &commonHandler{ - json: false, - w: w, - opts: *opts, - }, - } -} - -// Enabled reports whether the handler handles records at the given level. -// The handler ignores records whose level is lower. -func (h *TextHandler) Enabled(_ context.Context, level Level) bool { - return h.commonHandler.enabled(level) -} - -// WithAttrs returns a new TextHandler whose attributes consists -// of h's attributes followed by attrs. -func (h *TextHandler) WithAttrs(attrs []Attr) Handler { - return &TextHandler{commonHandler: h.commonHandler.withAttrs(attrs)} -} - -func (h *TextHandler) WithGroup(name string) Handler { - return &TextHandler{commonHandler: h.commonHandler.withGroup(name)} -} - -// Handle formats its argument Record as a single line of space-separated -// key=value items. -// -// If the Record's time is zero, the time is omitted. -// Otherwise, the key is "time" -// and the value is output in RFC3339 format with millisecond precision. -// -// If the Record's level is zero, the level is omitted. -// Otherwise, the key is "level" -// and the value of [Level.String] is output. -// -// If the AddSource option is set and source information is available, -// the key is "source" and the value is output as FILE:LINE. -// -// The message's key is "msg". -// -// To modify these or other attributes, or remove them from the output, use -// [HandlerOptions.ReplaceAttr]. -// -// If a value implements [encoding.TextMarshaler], the result of MarshalText is -// written. Otherwise, the result of fmt.Sprint is written. -// -// Keys and values are quoted with [strconv.Quote] if they contain Unicode space -// characters, non-printing characters, '"' or '='. -// -// Keys inside groups consist of components (keys or group names) separated by -// dots. No further escaping is performed. -// Thus there is no way to determine from the key "a.b.c" whether there -// are two groups "a" and "b" and a key "c", or a single group "a.b" and a key "c", -// or single group "a" and a key "b.c". -// If it is necessary to reconstruct the group structure of a key -// even in the presence of dots inside components, use -// [HandlerOptions.ReplaceAttr] to encode that information in the key. -// -// Each call to Handle results in a single serialized call to -// io.Writer.Write. -func (h *TextHandler) Handle(_ context.Context, r Record) error { - return h.commonHandler.handle(r) -} - -func appendTextValue(s *handleState, v Value) error { - switch v.Kind() { - case KindString: - s.appendString(v.str()) - case KindTime: - s.appendTime(v.time()) - case KindAny: - if tm, ok := v.any.(encoding.TextMarshaler); ok { - data, err := tm.MarshalText() - if err != nil { - return err - } - // TODO: avoid the conversion to string. - s.appendString(string(data)) - return nil - } - if bs, ok := byteSlice(v.any); ok { - // As of Go 1.19, this only allocates for strings longer than 32 bytes. - s.buf.WriteString(strconv.Quote(string(bs))) - return nil - } - s.appendString(fmt.Sprintf("%+v", v.Any())) - default: - *s.buf = v.append(*s.buf) - } - return nil -} - -// byteSlice returns its argument as a []byte if the argument's -// underlying type is []byte, along with a second return value of true. -// Otherwise it returns nil, false. -func byteSlice(a any) ([]byte, bool) { - if bs, ok := a.([]byte); ok { - return bs, true - } - // Like Printf's %s, we allow both the slice type and the byte element type to be named. - t := reflect.TypeOf(a) - if t != nil && t.Kind() == reflect.Slice && t.Elem().Kind() == reflect.Uint8 { - return reflect.ValueOf(a).Bytes(), true - } - return nil, false -} - -func needsQuoting(s string) bool { - if len(s) == 0 { - return true - } - for i := 0; i < len(s); { - b := s[i] - if b < utf8.RuneSelf { - // Quote anything except a backslash that would need quoting in a - // JSON string, as well as space and '=' - if b != '\\' && (b == ' ' || b == '=' || !safeSet[b]) { - return true - } - i++ - continue - } - r, size := utf8.DecodeRuneInString(s[i:]) - if r == utf8.RuneError || unicode.IsSpace(r) || !unicode.IsPrint(r) { - return true - } - i += size - } - return false -} |