Update dependencies (#333)

1 files changed, 915 insertions, 0 deletions

diff --git a/vendor/codeberg.org/gruf/go-logger/format_text.go b/vendor/codeberg.org/gruf/go-logger/format_text.go
new file mode 100644
index 000000000..e2380884b
--- /dev/null
+++ b/vendor/codeberg.org/gruf/go-logger/format_text.go
@@ -0,0 +1,915 @@
+package logger
+
+import (
+	stdfmt "fmt"
+	"reflect"
+	"strconv"
+	"time"
+	"unsafe"
+
+	"codeberg.org/gruf/go-bytes"
+)
+
+// DefaultTextFormat is the default TextFormat instance
+var DefaultTextFormat = TextFormat{
+	Strict:     false,
+	MaxDepth:   5,
+	Levels:     DefaultLevels(),
+	TimeFormat: time.RFC1123,
+}
+
+// TextFormat is the default LogFormat implementation, with very similar formatting to logfmt
+type TextFormat struct {
+	// Strict defines whether to use strict key-value pair formatting, i.e. should the level
+	// timestamp and msg be formatted as key-value pairs (with forced quoting for msg)
+	Strict bool
+
+	// MaxDepth specifies the max depth of fields the formatter will iterate
+	MaxDepth uint8
+
+	// Levels defines the map of log LEVELs to level strings
+	Levels Levels
+
+	// TimeFormat specifies the time formatting to use
+	TimeFormat string
+}
+
+// fmt returns a new format instance based on receiver TextFormat and given buffer
+func (f TextFormat) fmt(buf *bytes.Buffer) format {
+	return format{
+		isKey: false,
+		depth: 0,
+		txt:   f,
+		buf:   buf,
+	}
+}
+
+func (f TextFormat) AppendLevel(buf *bytes.Buffer, lvl LEVEL) {
+	if f.Strict {
+		// Strict format, append level key
+		buf.WriteString(`level=`)
+		buf.WriteString(f.Levels.LevelString(lvl))
+		return
+	}
+
+	// Write level string
+	buf.WriteByte('[')
+	buf.WriteString(f.Levels.LevelString(lvl))
+	buf.WriteByte(']')
+}
+
+func (f TextFormat) AppendTimestamp(buf *bytes.Buffer, now string) {
+	if f.Strict {
+		// Strict format, use key and quote
+		buf.WriteString(`time=`)
+		appendString(f.fmt(buf), now)
+		return
+	}
+
+	// Write time as-is
+	buf.WriteString(now)
+}
+
+func (f TextFormat) AppendField(buf *bytes.Buffer, key string, value interface{}) {
+	appendKey(buf, key)
+	appendIfaceOrRValue(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendFields(buf *bytes.Buffer, fields map[string]interface{}) {
+	fmt := f.fmt(buf)
+
+	// Append individual fields
+	for key, value := range fields {
+		appendKey(buf, key)
+		appendIfaceOrRValue(fmt, value)
+		buf.WriteByte(' ')
+	}
+
+	// Drop last space
+	if len(fields) > 0 {
+		buf.Truncate(1)
+	}
+}
+
+func (f TextFormat) AppendValue(buf *bytes.Buffer, value interface{}) {
+	appendIfaceOrRValue(f.fmt(buf).IsKey(true), value)
+}
+
+func (f TextFormat) AppendValues(buf *bytes.Buffer, values []interface{}) {
+	// Prepare formatter
+	fmt := f.fmt(buf).IsKey(true)
+
+	// Append each of the values
+	for _, value := range values {
+		appendIfaceOrRValue(fmt, value)
+		buf.WriteByte(' ')
+	}
+
+	// Drop last space
+	if len(values) > 0 {
+		buf.Truncate(1)
+	}
+}
+
+func (f TextFormat) AppendArgs(buf *bytes.Buffer, args []interface{}) {
+	// Prepare formatter
+	fmt := f.fmt(buf).IsKey(true).IsRaw(true)
+
+	// Append each of the values
+	for _, arg := range args {
+		appendIfaceOrRValue(fmt, arg)
+		buf.WriteByte(' ')
+	}
+
+	// Drop last space
+	if len(args) > 0 {
+		buf.Truncate(1)
+	}
+}
+
+func (f TextFormat) AppendByteField(buf *bytes.Buffer, key string, value byte) {
+	appendKey(buf, key)
+	appendByte(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendBytesField(buf *bytes.Buffer, key string, value []byte) {
+	appendKey(buf, key)
+	appendBytes(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendStringField(buf *bytes.Buffer, key string, value string) {
+	appendKey(buf, key)
+	appendString(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendStringsField(buf *bytes.Buffer, key string, value []string) {
+	appendKey(buf, key)
+	appendStringSlice(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendBoolField(buf *bytes.Buffer, key string, value bool) {
+	appendKey(buf, key)
+	appendBool(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendBoolsField(buf *bytes.Buffer, key string, value []bool) {
+	appendKey(buf, key)
+	appendBoolSlice(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendIntField(buf *bytes.Buffer, key string, value int) {
+	appendKey(buf, key)
+	appendInt(f.fmt(buf), int64(value))
+}
+
+func (f TextFormat) AppendIntsField(buf *bytes.Buffer, key string, value []int) {
+	appendKey(buf, key)
+	appendIntSlice(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendUintField(buf *bytes.Buffer, key string, value uint) {
+	appendKey(buf, key)
+	appendUint(f.fmt(buf), uint64(value))
+}
+
+func (f TextFormat) AppendUintsField(buf *bytes.Buffer, key string, value []uint) {
+	appendKey(buf, key)
+	appendUintSlice(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendFloatField(buf *bytes.Buffer, key string, value float64) {
+	appendKey(buf, key)
+	appendFloat(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendFloatsField(buf *bytes.Buffer, key string, value []float64) {
+	appendKey(buf, key)
+	appendFloatSlice(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendTimeField(buf *bytes.Buffer, key string, value time.Time) {
+	appendKey(buf, key)
+	appendTime(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendTimesField(buf *bytes.Buffer, key string, value []time.Time) {
+	appendKey(buf, key)
+	appendTimeSlice(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendDurationField(buf *bytes.Buffer, key string, value time.Duration) {
+	appendKey(buf, key)
+	appendDuration(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendDurationsField(buf *bytes.Buffer, key string, value []time.Duration) {
+	appendKey(buf, key)
+	appendDurationSlice(f.fmt(buf), value)
+}
+
+func (f TextFormat) AppendMsg(buf *bytes.Buffer, a ...interface{}) {
+	if f.Strict {
+		// Strict format, use key and quote
+		buf.WriteString(`msg=`)
+		buf.B = strconv.AppendQuote(buf.B, stdfmt.Sprint(a...))
+		return
+	}
+
+	// Write message as-is
+	stdfmt.Fprint(buf, a...)
+}
+
+func (f TextFormat) AppendMsgf(buf *bytes.Buffer, s string, a ...interface{}) {
+	if f.Strict {
+		// Strict format, use key and quote
+		buf.WriteString(`msg=`)
+		buf.B = strconv.AppendQuote(buf.B, stdfmt.Sprintf(s, a...))
+		return
+	}
+
+	// Write message as-is
+	stdfmt.Fprintf(buf, s, a...)
+}
+
+// format is the object passed among the append___ formatting functions
+type format struct {
+	raw   bool
+	isKey bool
+	depth uint8
+	txt   TextFormat
+	buf   *bytes.Buffer
+}
+
+// IsKey returns format instance with key set to value
+func (f format) IsKey(is bool) format {
+	return format{
+		raw:   f.raw,
+		isKey: is,
+		depth: f.depth,
+		txt:   f.txt,
+		buf:   f.buf,
+	}
+}
+
+// IsRaw returns format instance with raw set to value
+func (f format) IsRaw(is bool) format {
+	return format{
+		raw:   is,
+		isKey: f.isKey,
+		depth: f.depth,
+		txt:   f.txt,
+		buf:   f.buf,
+	}
+}
+
+// IncrDepth returns format instance with depth incremented
+func (f format) IncrDepth() format {
+	return format{
+		raw:   f.raw,
+		isKey: f.isKey,
+		depth: f.depth + 1,
+		txt:   f.txt,
+		buf:   f.buf,
+	}
+}
+
+// appendByte writes a single byte to buf
+func appendByte(fmt format, b byte) {
+	fmt.buf.WriteByte(b)
+}
+
+// appendBytes writes a quoted byte slice to buf
+func appendBytes(fmt format, b []byte) {
+	if !fmt.isKey && b == nil {
+		// Values CAN be nil formatted
+		appendNilType(fmt, `[]byte`)
+	} else {
+		appendString(fmt, bytes.BytesToString(b))
+	}
+}
+
+// appendString writes an escaped, double-quoted string to buf
+func appendString(fmt format, s string) {
+	if !fmt.raw {
+		// Only handle quoting if NOT raw
+		if !strconv.CanBackquote(s) || !fmt.isKey {
+			// All non-keys and multiline keys get quoted + escaped
+			fmt.buf.B = strconv.AppendQuote(fmt.buf.B, s)
+			return
+		} else if containsSpaceOrTab(s) {
+			// Key containing spaces/tabs, quote this
+			fmt.buf.WriteByte('"')
+			fmt.buf.WriteString(s)
+			fmt.buf.WriteByte('"')
+			return
+		}
+	}
+
+	// Safe to leave unquoted
+	fmt.buf.WriteString(s)
+}
+
+// appendStringSlice writes a slice of strings to buf
+func appendStringSlice(fmt format, s []string) {
+	// Check for nil slice
+	if s == nil {
+		appendNilType(fmt, `[]string`)
+		return
+	}
+
+	fmt.buf.WriteByte('[')
+
+	// Prepare formatter
+	fmt = fmt.IsKey(false)
+
+	// Write elements
+	for _, s := range s {
+		appendString(fmt, s)
+		fmt.buf.WriteByte(',')
+	}
+
+	// Drop last comma
+	if len(s) > 0 {
+		fmt.buf.Truncate(1)
+	}
+
+	fmt.buf.WriteByte(']')
+}
+
+// appendBool writes a formatted bool to buf
+func appendBool(fmt format, b bool) {
+	fmt.buf.B = strconv.AppendBool(fmt.buf.B, b)
+}
+
+// appendBool writes a slice of formatted bools to buf
+func appendBoolSlice(fmt format, b []bool) {
+	// Check for nil slice
+	if b == nil {
+		appendNilType(fmt, `[]bool`)
+		return
+	}
+
+	fmt.buf.WriteByte('[')
+
+	// Write elements
+	for _, b := range b {
+		appendBool(fmt, b)
+		fmt.buf.WriteByte(',')
+	}
+
+	// Drop last comma
+	if len(b) > 0 {
+		fmt.buf.Truncate(1)
+	}
+
+	fmt.buf.WriteByte(']')
+}
+
+// appendInt writes a formatted int to buf
+func appendInt(fmt format, i int64) {
+	fmt.buf.B = strconv.AppendInt(fmt.buf.B, i, 10)
+}
+
+// appendIntSlice writes a slice of formatted int to buf
+func appendIntSlice(fmt format, i []int) {
+	// Check for nil slice
+	if i == nil {
+		appendNilType(fmt, `[]int`)
+		return
+	}
+
+	fmt.buf.WriteByte('[')
+
+	// Write elements
+	for _, i := range i {
+		appendInt(fmt, int64(i))
+		fmt.buf.WriteByte(',')
+	}
+
+	// Drop last comma
+	if len(i) > 0 {
+		fmt.buf.Truncate(1)
+	}
+
+	fmt.buf.WriteByte(']')
+}
+
+// appendUint writes a formatted uint to buf
+func appendUint(fmt format, u uint64) {
+	fmt.buf.B = strconv.AppendUint(fmt.buf.B, u, 10)
+}
+
+// appendUintSlice writes a slice of formatted uint to buf
+func appendUintSlice(fmt format, u []uint) {
+	// Check for nil slice
+	if u == nil {
+		appendNilType(fmt, `[]uint`)
+		return
+	}
+
+	fmt.buf.WriteByte('[')
+
+	// Write elements
+	for _, u := range u {
+		appendUint(fmt, uint64(u))
+		fmt.buf.WriteByte(',')
+	}
+
+	// Drop last comma
+	if len(u) > 0 {
+		fmt.buf.Truncate(1)
+	}
+
+	fmt.buf.WriteByte(']')
+}
+
+// appendFloat writes a formatted float to buf
+func appendFloat(fmt format, f float64) {
+	fmt.buf.B = strconv.AppendFloat(fmt.buf.B, f, 'G', -1, 64)
+}
+
+// appendFloatSlice writes a slice formatted floats to buf
+func appendFloatSlice(fmt format, f []float64) {
+	// Check for nil slice
+	if f == nil {
+		appendNilType(fmt, `[]float64`)
+		return
+	}
+
+	fmt.buf.WriteByte('[')
+
+	// Write elements
+	for _, f := range f {
+		appendFloat(fmt, f)
+		fmt.buf.WriteByte(',')
+	}
+
+	// Drop last comma
+	if len(f) > 0 {
+		fmt.buf.Truncate(1)
+	}
+
+	fmt.buf.WriteByte(']')
+}
+
+// appendTime writes a formatted, quoted time string to buf
+func appendTime(fmt format, t time.Time) {
+	appendString(fmt.IsKey(true), t.Format(fmt.txt.TimeFormat))
+}
+
+// appendTimeSlice writes a slice of formatted time strings to buf
+func appendTimeSlice(fmt format, t []time.Time) {
+	// Check for nil slice
+	if t == nil {
+		appendNilType(fmt, `[]time.Time`)
+		return
+	}
+
+	fmt.buf.WriteByte('[')
+
+	// Prepare formatter
+	fmt = fmt.IsKey(true)
+
+	// Write elements
+	for _, t := range t {
+		appendString(fmt, t.Format(fmt.txt.TimeFormat))
+		fmt.buf.WriteByte(',')
+	}
+
+	// Drop last comma
+	if len(t) > 0 {
+		fmt.buf.Truncate(1)
+	}
+
+	fmt.buf.WriteByte(']')
+}
+
+// appendDuration writes a formatted, quoted duration string to buf
+func appendDuration(fmt format, d time.Duration) {
+	appendString(fmt.IsKey(true), d.String())
+}
+
+// appendDurationSlice writes a slice of formatted, quoted duration strings to buf
+func appendDurationSlice(fmt format, d []time.Duration) {
+	// Check for nil slice
+	if d == nil {
+		appendNilType(fmt, `[]time.Duration`)
+		return
+	}
+
+	fmt.buf.WriteByte('[')
+
+	// Prepare formatter
+	fmt = fmt.IsKey(true)
+
+	// Write elements
+	for _, d := range d {
+		appendString(fmt, d.String())
+		fmt.buf.WriteByte(',')
+	}
+
+	// Drop last comma
+	if len(d) > 0 {
+		fmt.buf.Truncate(1)
+	}
+
+	fmt.buf.WriteByte(']')
+}
+
+// appendComplex writes a formatted complex128 to buf
+func appendComplex(fmt format, c complex128) {
+	appendFloat(fmt, real(c))
+	fmt.buf.WriteByte('+')
+	appendFloat(fmt, imag(c))
+	fmt.buf.WriteByte('i')
+}
+
+// appendComplexSlice writes a slice of formatted complex128s to buf
+func appendComplexSlice(fmt format, c []complex128) {
+	// Check for nil slice
+	if c == nil {
+		appendNilType(fmt, `[]complex128`)
+		return
+	}
+
+	fmt.buf.WriteByte('[')
+
+	// Write elements
+	for _, c := range c {
+		appendComplex(fmt, c)
+		fmt.buf.WriteByte(',')
+	}
+
+	// Drop last comma
+	if len(c) > 0 {
+		fmt.buf.Truncate(1)
+	}
+
+	fmt.buf.WriteByte(']')
+}
+
+// notNil will safely check if 'v' is nil without dealing with weird Go interface nil bullshit.
+func notNil(i interface{}) bool {
+	// cast to get fat pointer
+	e := *(*struct {
+		typeOf  unsafe.Pointer // ignored
+		valueOf unsafe.Pointer
+	})(unsafe.Pointer(&i))
+
+	// check if value part is nil
+	return (e.valueOf != nil)
+}
+
+// appendNilType will append a formatted nil of type 't'
+func appendNilType(fmt format, t string) {
+	fmt.buf.WriteByte('(')
+	fmt.buf.WriteString(t)
+	fmt.buf.WriteString(`)(<nil>)`)
+}
+
+// appendNilValue will append a formatted nil of type fetched from value 'v'
+func appendNilRValue(fmt format, v reflect.Value) {
+	appendNilType(fmt, v.Type().String())
+}
+
+// appendIfaceOrReflectValue will attempt to append as interface, falling back to reflection
+func appendIfaceOrRValue(fmt format, i interface{}) {
+	// Check we haven't hit max
+	if fmt.depth >= fmt.txt.MaxDepth {
+		fmt.buf.WriteString("...")
+		return
+	}
+
+	// Incr the depth
+	fmt = fmt.IncrDepth()
+
+	// Attempt to append interface, fallback to reflect
+	if !appendIface(fmt, i) {
+		appendRValue(fmt, reflect.ValueOf(i))
+	}
+}
+
+// appendReflectValueOrIface will attempt to interface the reflect.Value, falling back to using this directly
+func appendRValueOrIface(fmt format, v reflect.Value) {
+	// Check we haven't hit max
+	if fmt.depth >= fmt.txt.MaxDepth {
+		fmt.buf.WriteString("...")
+		return
+	}
+
+	// Incr the depth
+	fmt = fmt.IncrDepth()
+
+	// Attempt to interface reflect value, fallback to handling value itself
+	if !v.CanInterface() || !appendIface(fmt, v.Interface()) {
+		appendRValue(fmt, v)
+	}
+}
+
+// appendIface parses and writes a formatted interface value to buf
+func appendIface(fmt format, i interface{}) bool {
+	switch i := i.(type) {
+	case nil:
+		fmt.buf.WriteString(`<nil>`)
+	case byte:
+		appendByte(fmt, i)
+	case []byte:
+		appendBytes(fmt, i)
+	case string:
+		appendString(fmt, i)
+	case []string:
+		appendStringSlice(fmt, i)
+	case int:
+		appendInt(fmt, int64(i))
+	case int8:
+		appendInt(fmt, int64(i))
+	case int16:
+		appendInt(fmt, int64(i))
+	case int32:
+		appendInt(fmt, int64(i))
+	case int64:
+		appendInt(fmt, i)
+	case []int:
+		appendIntSlice(fmt, i)
+	case uint:
+		appendUint(fmt, uint64(i))
+	case uint16:
+		appendUint(fmt, uint64(i))
+	case uint32:
+		appendUint(fmt, uint64(i))
+	case uint64:
+		appendUint(fmt, i)
+	case []uint:
+		appendUintSlice(fmt, i)
+	case float32:
+		appendFloat(fmt, float64(i))
+	case float64:
+		appendFloat(fmt, i)
+	case []float64:
+		appendFloatSlice(fmt, i)
+	case bool:
+		appendBool(fmt, i)
+	case []bool:
+		appendBoolSlice(fmt, i)
+	case time.Time:
+		appendTime(fmt, i)
+	case []time.Time:
+		appendTimeSlice(fmt, i)
+	case time.Duration:
+		appendDuration(fmt, i)
+	case []time.Duration:
+		appendDurationSlice(fmt, i)
+	case complex64:
+		appendComplex(fmt, complex128(i))
+	case complex128:
+		appendComplex(fmt, i)
+	case []complex128:
+		appendComplexSlice(fmt, i)
+	case map[string]interface{}:
+		appendIfaceMap(fmt, i)
+	case error:
+		if notNil(i) /* use safer nil check */ {
+			appendString(fmt, i.Error())
+		} else {
+			appendNilType(fmt, reflect.TypeOf(i).String())
+		}
+	case stdfmt.Stringer:
+		if notNil(i) /* use safer nil check */ {
+			appendString(fmt, i.String())
+		} else {
+			appendNilType(fmt, reflect.TypeOf(i).String())
+		}
+	default:
+		return false // could not handle
+	}
+
+	return true
+}
+
+// appendReflectValue will safely append a reflected value
+func appendRValue(fmt format, v reflect.Value) {
+	switch v.Kind() {
+	case reflect.Float32, reflect.Float64:
+		appendFloat(fmt, v.Float())
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		appendInt(fmt, v.Int())
+	case reflect.Uint8:
+		appendByte(fmt, uint8(v.Uint()))
+	case reflect.Uint, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		appendUint(fmt, v.Uint())
+	case reflect.Bool:
+		appendBool(fmt, v.Bool())
+	case reflect.Array:
+		appendArrayType(fmt, v)
+	case reflect.Slice:
+		appendSliceType(fmt, v)
+	case reflect.Map:
+		appendMapType(fmt, v)
+	case reflect.Struct:
+		appendStructType(fmt, v)
+	case reflect.Ptr:
+		if v.IsNil() {
+			appendNilRValue(fmt, v)
+		} else {
+			appendRValue(fmt, v.Elem())
+		}
+	case reflect.UnsafePointer:
+		fmt.buf.WriteString("(unsafe.Pointer)")
+		fmt.buf.WriteByte('(')
+		if u := v.Pointer(); u != 0 {
+			fmt.buf.WriteString("0x")
+			fmt.buf.B = strconv.AppendUint(fmt.buf.B, uint64(u), 16)
+		} else {
+			fmt.buf.WriteString(`<nil>`)
+		}
+		fmt.buf.WriteByte(')')
+	case reflect.Uintptr:
+		fmt.buf.WriteString("(uintptr)")
+		fmt.buf.WriteByte('(')
+		if u := v.Uint(); u != 0 {
+			fmt.buf.WriteString("0x")
+			fmt.buf.B = strconv.AppendUint(fmt.buf.B, u, 16)
+		} else {
+			fmt.buf.WriteString(`<nil>`)
+		}
+		fmt.buf.WriteByte(')')
+	case reflect.String:
+		appendString(fmt, v.String())
+	case reflect.Complex64, reflect.Complex128:
+		appendComplex(fmt, v.Complex())
+	case reflect.Func, reflect.Chan, reflect.Interface:
+		if v.IsNil() {
+			appendNilRValue(fmt, v)
+		} else {
+			fmt.buf.WriteString(v.String())
+		}
+	default:
+		fmt.buf.WriteString(v.String())
+	}
+}
+
+// appendIfaceMap writes a map of key-value pairs (as a set of fields) to buf
+func appendIfaceMap(fmt format, v map[string]interface{}) {
+	// Catch nil map
+	if v == nil {
+		appendNilType(fmt, `map[string]interface{}`)
+		return
+	}
+
+	fmt.buf.WriteByte('{')
+
+	// Prepare formatters
+	fmtKey := fmt.IsKey(true)
+	fmtVal := fmt.IsKey(false)
+
+	// Write map pairs!
+	for key, value := range v {
+		appendString(fmtKey, key)
+		fmt.buf.WriteByte('=')
+		appendIfaceOrRValue(fmtVal, value)
+		fmt.buf.WriteByte(' ')
+	}
+
+	// Drop last space
+	if len(v) > 0 {
+		fmt.buf.Truncate(1)
+	}
+
+	fmt.buf.WriteByte('}')
+}
+
+// appendArrayType writes an array of unknown type (parsed by reflection) to buf, unlike appendSliceType does NOT catch nil slice
+func appendArrayType(fmt format, v reflect.Value) {
+	// get no. elements
+	n := v.Len()
+
+	fmt.buf.WriteByte('[')
+
+	// Prepare formatter
+	fmt = fmt.IsKey(false)
+
+	// Write values
+	for i := 0; i < n; i++ {
+		appendRValueOrIface(fmt, v.Index(i))
+		fmt.buf.WriteByte(',')
+	}
+
+	// Drop last comma
+	if n > 0 {
+		fmt.buf.Truncate(1)
+	}
+
+	fmt.buf.WriteByte(']')
+}
+
+// appendSliceType writes a slice of unknown type (parsed by reflection) to buf
+func appendSliceType(fmt format, v reflect.Value) {
+	if v.IsNil() {
+		appendNilRValue(fmt, v)
+	} else {
+		appendArrayType(fmt, v)
+	}
+}
+
+// appendMapType writes a map of unknown types (parsed by reflection) to buf
+func appendMapType(fmt format, v reflect.Value) {
+	// Catch nil map
+	if v.IsNil() {
+		appendNilRValue(fmt, v)
+		return
+	}
+
+	// Get a map iterator
+	r := v.MapRange()
+	n := v.Len()
+
+	fmt.buf.WriteByte('{')
+
+	// Prepare formatters
+	fmtKey := fmt.IsKey(true)
+	fmtVal := fmt.IsKey(false)
+
+	// Iterate pairs
+	for r.Next() {
+		appendRValueOrIface(fmtKey, r.Key())
+		fmt.buf.WriteByte('=')
+		appendRValueOrIface(fmtVal, r.Value())
+		fmt.buf.WriteByte(' ')
+	}
+
+	// Drop last space
+	if n > 0 {
+		fmt.buf.Truncate(1)
+	}
+
+	fmt.buf.WriteByte('}')
+}
+
+// appendStructType writes a struct (as a set of key-value fields) to buf
+func appendStructType(fmt format, v reflect.Value) {
+	// Get value type & no. fields
+	t := v.Type()
+	n := v.NumField()
+	w := 0
+
+	fmt.buf.WriteByte('{')
+
+	// Prepare formatters
+	fmtKey := fmt.IsKey(true)
+	fmtVal := fmt.IsKey(false)
+
+	// Iterate fields
+	for i := 0; i < n; i++ {
+		vfield := v.Field(i)
+
+		if !vfield.CanInterface() {
+			// This is an unexported field
+			appendRValue(fmtVal, vfield)
+		} else {
+			// This is an exported field!
+			appendString(fmtKey, t.Field(i).Name)
+			fmt.buf.WriteByte('=')
+			appendRValueOrIface(fmtVal, vfield)
+		}
+
+		// Iter written count
+		fmt.buf.WriteByte(' ')
+		w++
+	}
+
+	// Drop last space
+	if w > 0 {
+		fmt.buf.Truncate(1)
+	}
+
+	fmt.buf.WriteByte('}')
+}
+
+// appendKey should only be used in the case of directly setting key-value pairs,
+// not in the case of appendMapType, appendStructType
+func appendKey(buf *bytes.Buffer, key string) {
+	if len(key) > 0 {
+		if containsSpaceOrTab(key) {
+			// Key containing spaces/tabs, quote this
+			buf.WriteByte('"')
+			buf.WriteString(key)
+			buf.WriteByte('"')
+		} else {
+			// Key is safe to leave unquoted
+			buf.WriteString(key)
+		}
+
+		// Write final '='
+		buf.WriteByte('=')
+	}
+}
+
+// containsSpaceOrTab checks if "s" contains space or tabs
+func containsSpaceOrTab(s string) bool {
+	for _, r := range s {
+		if r == ' ' || r == '\t' {
+			return true
+		}
+	}
+	return false
+}