func (s *testFlusherSink) appendNumber(v interface{}) {
switch n := v.(type) {
case int:
s.buf = strconv.AppendInt(s.buf, int64(n), 10)
case uint:
s.buf = strconv.AppendUint(s.buf, uint64(n), 10)
case int64:
s.buf = strconv.AppendInt(s.buf, n, 10)
case uint64:
s.buf = strconv.AppendUint(s.buf, n, 10)
case int32:
s.buf = strconv.AppendInt(s.buf, int64(n), 10)
case uint32:
s.buf = strconv.AppendUint(s.buf, uint64(n), 10)
case int16:
s.buf = strconv.AppendInt(s.buf, int64(n), 10)
case uint16:
s.buf = strconv.AppendUint(s.buf, uint64(n), 10)
case int8:
s.buf = strconv.AppendInt(s.buf, int64(n), 10)
case uint8:
s.buf = strconv.AppendUint(s.buf, uint64(n), 10)
case float64:
s.buf = strconv.AppendFloat(s.buf, n, 'f', -1, 64)
case float32:
s.buf = strconv.AppendFloat(s.buf, float64(n), 'f', -1, 32)
}
}
func formatTextValue(value interface{}) ([]byte, error) {
switch v := value.(type) {
case int8:
return strconv.AppendInt(nil, int64(v), 10), nil
case int16:
return strconv.AppendInt(nil, int64(v), 10), nil
case int32:
return strconv.AppendInt(nil, int64(v), 10), nil
case int64:
return strconv.AppendInt(nil, int64(v), 10), nil
case int:
return strconv.AppendInt(nil, int64(v), 10), nil
case uint8:
return strconv.AppendUint(nil, uint64(v), 10), nil
case uint16:
return strconv.AppendUint(nil, uint64(v), 10), nil
case uint32:
return strconv.AppendUint(nil, uint64(v), 10), nil
case uint64:
return strconv.AppendUint(nil, uint64(v), 10), nil
case uint:
return strconv.AppendUint(nil, uint64(v), 10), nil
case float32:
return strconv.AppendFloat(nil, float64(v), 'f', -1, 64), nil
case float64:
return strconv.AppendFloat(nil, float64(v), 'f', -1, 64), nil
case []byte:
return v, nil
case string:
return hack.Slice(v), nil
default:
return nil, errors.Errorf("invalid type %T", value)
}
}
func (c *conn) appendNumber(v interface{}) {
switch n := v.(type) {
case int:
c.buf = strconv.AppendInt(c.buf, int64(n), 10)
case uint:
c.buf = strconv.AppendUint(c.buf, uint64(n), 10)
case int64:
c.buf = strconv.AppendInt(c.buf, n, 10)
case uint64:
c.buf = strconv.AppendUint(c.buf, n, 10)
case int32:
c.buf = strconv.AppendInt(c.buf, int64(n), 10)
case uint32:
c.buf = strconv.AppendUint(c.buf, uint64(n), 10)
case int16:
c.buf = strconv.AppendInt(c.buf, int64(n), 10)
case uint16:
c.buf = strconv.AppendUint(c.buf, uint64(n), 10)
case int8:
c.buf = strconv.AppendInt(c.buf, int64(n), 10)
case uint8:
c.buf = strconv.AppendUint(c.buf, uint64(n), 10)
case float64:
c.buf = strconv.AppendFloat(c.buf, n, 'f', -1, 64)
case float32:
c.buf = strconv.AppendFloat(c.buf, float64(n), 'f', -1, 32)
}
}
// appendEncodedText encodes item in text format as required by COPY
// and appends to buf
func appendEncodedText(parameterStatus *parameterStatus, buf []byte, x interface{}) []byte {
switch v := x.(type) {
case int64:
return strconv.AppendInt(buf, v, 10)
case float32:
return strconv.AppendFloat(buf, float64(v), 'f', -1, 32)
case float64:
return strconv.AppendFloat(buf, v, 'f', -1, 64)
case []byte:
encodedBytea := encodeBytea(parameterStatus.serverVersion, v)
return appendEscapedText(buf, string(encodedBytea))
case string:
return appendEscapedText(buf, v)
case bool:
return strconv.AppendBool(buf, v)
case time.Time:
return append(buf, v.Format(time.RFC3339Nano)...)
case nil:
return append(buf, "\\N"...)
default:
errorf("encode: unknown type for %T", v)
}
panic("not reached")
}
func dumpTextValue(mysqlType uint8, value types.Datum) ([]byte, error) {
switch value.Kind() {
case types.KindInt64:
return strconv.AppendInt(nil, value.GetInt64(), 10), nil
case types.KindUint64:
return strconv.AppendUint(nil, value.GetUint64(), 10), nil
case types.KindFloat32:
return strconv.AppendFloat(nil, value.GetFloat64(), 'f', -1, 32), nil
case types.KindFloat64:
return strconv.AppendFloat(nil, value.GetFloat64(), 'f', -1, 64), nil
case types.KindString, types.KindBytes:
return value.GetBytes(), nil
case types.KindMysqlTime:
return hack.Slice(value.GetMysqlTime().String()), nil
case types.KindMysqlDuration:
return hack.Slice(value.GetMysqlDuration().String()), nil
case types.KindMysqlDecimal:
return hack.Slice(value.GetMysqlDecimal().String()), nil
case types.KindMysqlEnum:
return hack.Slice(value.GetMysqlEnum().String()), nil
case types.KindMysqlSet:
return hack.Slice(value.GetMysqlSet().String()), nil
case types.KindMysqlBit:
return hack.Slice(value.GetMysqlBit().ToString()), nil
case types.KindMysqlHex:
return hack.Slice(value.GetMysqlHex().ToString()), nil
default:
return nil, errInvalidType.Gen("invalid type %T", value)
}
}
func appendField(b []byte, k string, v interface{}) []byte {
b = append(b, []byte(escape.String(k))...)
b = append(b, '=')
// check popular types first
switch v := v.(type) {
case float64:
b = strconv.AppendFloat(b, v, 'f', -1, 64)
case int64:
b = strconv.AppendInt(b, v, 10)
b = append(b, 'i')
case string:
b = append(b, '"')
b = append(b, []byte(EscapeStringField(v))...)
b = append(b, '"')
case bool:
b = strconv.AppendBool(b, v)
case int32:
b = strconv.AppendInt(b, int64(v), 10)
b = append(b, 'i')
case int16:
b = strconv.AppendInt(b, int64(v), 10)
b = append(b, 'i')
case int8:
b = strconv.AppendInt(b, int64(v), 10)
b = append(b, 'i')
case int:
b = strconv.AppendInt(b, int64(v), 10)
b = append(b, 'i')
case uint32:
b = strconv.AppendInt(b, int64(v), 10)
b = append(b, 'i')
case uint16:
b = strconv.AppendInt(b, int64(v), 10)
b = append(b, 'i')
case uint8:
b = strconv.AppendInt(b, int64(v), 10)
b = append(b, 'i')
// TODO: 'uint' should be considered just as "dangerous" as a uint64,
// perhaps the value should be checked and capped at MaxInt64? We could
// then include uint64 as an accepted value
case uint:
b = strconv.AppendInt(b, int64(v), 10)
b = append(b, 'i')
case float32:
b = strconv.AppendFloat(b, float64(v), 'f', -1, 32)
case []byte:
b = append(b, v...)
case nil:
// skip
default:
// Can't determine the type, so convert to string
b = append(b, '"')
b = append(b, []byte(EscapeStringField(fmt.Sprintf("%v", v)))...)
b = append(b, '"')
}
return b
}
func ExampleAppendFloat() {
b32 := []byte("float32:")
b32 = strconv.AppendFloat(b32, 3.1415926535, 'E', -1, 32)
fmt.Println(string(b32))
b64 := []byte("float64:")
b64 = strconv.AppendFloat(b64, 3.1415926535, 'E', -1, 64)
fmt.Println(string(b64))
// Output:
// float32:3.1415927E+00
// float64:3.1415926535E+00
}
/*
func AppendFloat(dst []byte, f float64, fmt byte, prec int, bitSize int) []byte
参数列表
dst 原列表
f 需要append到列表的浮点数
fmt 转换格式 'b' 'e' 'E' 'f' 'g'或'G'
prec 浮点数精度
bitSize 32或64，32对应float32，64对应float64
返回值:
[]byte 返回列表
功能说明：
将浮点数f转换为字符串值，并将转换结果追加到dst的尾部，返回追加后的[]byte。
浮点数格式有'b' (-ddddp±ddd, 二进制指数), 'e' (-d.dddde±dd, 十进制指数), 'E' (-d.ddddE±dd, 十进制指数), 'f' (-ddd.dddd, 无指数), 'g' (大指数时相当于'e', 其他情况时相当于'f'), 'G' (大指数时相当于'E', 其他情况相当于'f').
精度用于控制当格式为'e' 'E' 'f' 'g' 'G'时除指数外的数字的个数；对于'e' 'E' 'f'指小数点后位数；对于'g' 'G'则表示总共的位数；如果使用-1，表示不改变数值的最小位数
*/
func main() {
f := 100.123456789
fmt.Println(f)
c := strconv.AppendFloat(make([]byte, 0), f, 'f', 10, 32)
fmt.Println(string(c))
c = strconv.AppendFloat(make([]byte, 0), f, 'e', 10, 32)
fmt.Println(string(c))
c = strconv.AppendFloat(make([]byte, 0), f, 'f', 10, 64)
fmt.Println(string(c))
c = strconv.AppendFloat(make([]byte, 0), f, 'e', 10, 64)
fmt.Println(string(c))
}
// submit an already sampled raw stat
func (s *Client) submit(stat, vprefix string, value interface{}, suffix string, rate float32) error {
data := bufPool.Get()
defer bufPool.Put(data)
if s.prefix != "" {
data.WriteString(s.prefix)
data.WriteString(".")
}
data.WriteString(stat)
data.WriteString(":")
if vprefix != "" {
data.WriteString(vprefix)
}
// sadly, no way to jam this back into the bytes.Buffer without
// doing a few allocations... avoiding those is the whole point here...
// so from here on out just use it as a raw []byte
b := data.Bytes()
switch v := value.(type) {
case string:
b = append(b, v...)
case int64:
b = strconv.AppendInt(b, v, 10)
case float64:
b = strconv.AppendFloat(b, v, 'f', -1, 64)
default:
return fmt.Errorf("No matching type format")
}
if suffix != "" {
b = append(b, suffix...)
}
if s.rate != 0 && s.rate != 1 {
rate *= s.rate
}
if rate < 1 {
b = append(b, "|@"...)
b = strconv.AppendFloat(b, float64(rate), 'f', 6, 32)
}
_, err := s.sender.Send(b)
return err
}
func encode(parameterStatus *parameterStatus, x interface{}, pgtypOid oid.Oid) []byte {
switch v := x.(type) {
case int64:
return strconv.AppendInt(nil, v, 10)
case float64:
return strconv.AppendFloat(nil, v, 'f', -1, 64)
case []byte:
if pgtypOid == oid.T_bytea {
return encodeBytea(parameterStatus.serverVersion, v)
}
return v
case string:
if pgtypOid == oid.T_bytea {
return encodeBytea(parameterStatus.serverVersion, []byte(v))
}
return []byte(v)
case bool:
return strconv.AppendBool(nil, v)
case time.Time:
return formatTs(v)
default:
errorf("encode: unknown type for %T", v)
}
panic("not reached")
}
func maxCellWidth(m Matrix, c rune, printed, prec int) ([]byte, int) {
var (
buf = make([]byte, 0, 64)
rows, cols = m.Dims()
max int
)
for i := 0; i < rows; i++ {
if i >= printed-1 && i < rows-printed && 2*printed < rows {
i = rows - printed - 1
continue
}
for j := 0; j < cols; j++ {
if j >= printed && j < cols-printed {
continue
}
buf = strconv.AppendFloat(buf, m.At(i, j), byte(c), prec, 64)
if len(buf) > max {
max = len(buf)
}
buf = buf[:0]
}
}
return buf, max
}
// EncodeSQLValue ...
func EncodeSQLValue(buf []byte, arg interface{}) ([]byte, error) {
// Use sql.driver to convert the arg to a sql.Value which is simply
// an interface{} with a restricted set of types. This also takes
// care of using the sql.Valuer interface to convert arbitrary types
// into sql.Values.
dv, err := driver.DefaultParameterConverter.ConvertValue(arg)
if err != nil {
return nil, fmt.Errorf("converting query argument type: %v", err)
}
switch v := dv.(type) {
case nil:
return append(buf, nullstr...), nil
case bool:
if v {
return append(buf, '1'), nil
}
return append(buf, '0'), nil
case int64:
return strconv.AppendInt(buf, v, 10), nil
case float64:
return strconv.AppendFloat(buf, v, 'f', -1, 64), nil
case string:
return encodeSQLString(buf, []byte(v)), nil
case []byte:
return encodeSQLBytes(buf, v), nil
case time.Time:
return encodeSQLString(buf, []byte(v.Format("2006-01-02 15:04:05"))), nil
default:
return nil, fmt.Errorf("unsupported bind variable type %T: %v", arg, arg)
}
}
// formatFloat formats a float64; it is an efficient equivalent to f.pad(strconv.FormatFloat()...).
func (f *fmt) formatFloat(v float64, verb byte, prec, n int) {
// Format number, reserving space for leading + sign if needed.
num := strconv.AppendFloat(f.intbuf[0:1], v, verb, prec, n)
if num[1] == '-' || num[1] == '+' {
num = num[1:]
} else {
num[0] = '+'
}
// num is now a signed version of the number.
// If we're zero padding, want the sign before the leading zeros.
// Achieve this by writing the sign out and then padding the unsigned number.
if f.zero && f.widPresent && f.wid > len(num) {
f.buf.WriteByte(num[0])
f.wid--
f.pad(num[1:])
f.wid++ // Restore width; complex numbers will reuse this value for imaginary part.
return
}
// f.space says to replace a leading + with a space.
if f.space && num[0] == '+' {
num[0] = ' '
f.pad(num)
return
}
// Now we know the sign is attached directly to the number, if present at all.
// We want a sign if asked for, if it's negative, or if it's infinity (+Inf vs. -Inf).
if f.plus || num[0] == '-' || math.IsInf(v, 0) {
f.pad(num)
return
}
// No sign to show and the number is positive; just print the unsigned number.
f.pad(num[1:])
}
// formatFloat formats a float64; it is an efficient equivalent to f.pad(strconv.FormatFloat()...).
func (f *fmt) formatFloat(v float64, verb byte, prec, n int) {
// We leave one byte at the beginning of f.intbuf for a sign if needed,
// and make it a space, which we might be able to use.
f.intbuf[0] = ' '
slice := strconv.AppendFloat(f.intbuf[0:1], v, verb, prec, n)
// Add a plus sign or space to the floating-point string representation if missing and required.
// The formatted number starts at slice[1].
switch slice[1] {
case '-', '+':
// If we're zero padding, want the sign before the leading zeros.
// Achieve this by writing the sign out and padding the postive number.
if f.zero && f.widPresent && f.wid > len(slice) {
f.buf.WriteByte(slice[1])
f.wid--
f.pad(slice[2:])
return
}
// We're set; drop the leading space.
slice = slice[1:]
default:
// There's no sign, but we might need one.
if f.plus {
slice[0] = '+'
} else if f.space {
// space is already there
} else {
slice = slice[1:]
}
}
f.pad(slice)
}
func BenchmarkFloatToBytes1(b *testing.B) {
r := []byte{} //make([]byte, 10)
f := 123.456
for i := 0; i < b.N; i++ {
r = strconv.AppendFloat(r[:0], f, 'g', 6, 64)
}
}
func (e *jsonEncDriver) EncodeFloat64(f float64) {
if c := e.s.sc.sep(); c != 0 {
e.w.writen1(c)
}
// e.w.writestr(strconv.FormatFloat(f, 'E', -1, 64))
e.w.writeb(strconv.AppendFloat(e.b[:0], f, 'E', -1, 64))
}
func (p *PathData) shortenAltPosInstruction(cmd byte, coordFloats []float64, x, y float64) PathDataState {
state := p.state
p.altBuffer = p.altBuffer[:0]
if cmd != state.cmd && !(state.cmd == 'M' && cmd == 'L' || state.cmd == 'm' && cmd == 'l') {
p.altBuffer = append(p.altBuffer, cmd)
state.cmd = cmd
state.prevDigit = false
state.prevDigitIsInt = false
}
for i, f := range coordFloats {
if cmd == 'L' || cmd == 'l' || cmd == 'C' || cmd == 'c' || cmd == 'S' || cmd == 's' || cmd == 'Q' || cmd == 'q' || cmd == 'T' || cmd == 't' || cmd == 'M' || cmd == 'm' {
if i%2 == 0 {
f += x
} else {
f += y
}
} else if cmd == 'H' || cmd == 'h' {
f += x
} else if cmd == 'V' || cmd == 'v' {
f += y
} else if cmd == 'A' || cmd == 'a' {
if i%7 == 5 {
f += x
} else if i%7 == 6 {
f += y
}
}
p.coordBuffer = strconvStdlib.AppendFloat(p.coordBuffer[:0], f, 'g', -1, 64)
coord := minify.Number(p.coordBuffer, p.o.Decimals)
state.copyNumber(&p.altBuffer, coord)
}
return state
}
func (ps *Sample) AppendToPhout(dst []byte) []byte {
dst = strconv.AppendFloat(dst, ps.TS, 'f', 3, 64)
dst = append(dst, phoutDelimiter)
dst = append(dst, ps.Tag...)
dst = append(dst, phoutDelimiter)
dst = strconv.AppendInt(dst, int64(ps.RT), 10)
dst = append(dst, phoutDelimiter)
dst = strconv.AppendInt(dst, int64(ps.Connect), 10)
dst = append(dst, phoutDelimiter)
dst = strconv.AppendInt(dst, int64(ps.Send), 10)
dst = append(dst, phoutDelimiter)
dst = strconv.AppendInt(dst, int64(ps.Latency), 10)
dst = append(dst, phoutDelimiter)
dst = strconv.AppendInt(dst, int64(ps.Receive), 10)
dst = append(dst, phoutDelimiter)
dst = strconv.AppendInt(dst, int64(ps.IntervalEvent), 10)
dst = append(dst, phoutDelimiter)
dst = strconv.AppendInt(dst, int64(ps.Egress), 10)
dst = append(dst, phoutDelimiter)
dst = strconv.AppendInt(dst, int64(ps.Igress), 10)
dst = append(dst, phoutDelimiter)
dst = strconv.AppendInt(dst, int64(ps.NetCode), 10)
dst = append(dst, phoutDelimiter)
dst = strconv.AppendInt(dst, int64(ps.ProtoCode), 10)
dst = append(dst, phoutNewLine)
return dst
}
func Hincrbyfloat(args [][]byte, wb *levigo.WriteBatch) interface{} {
mk := metaKey(args[0])
length, err := hlen(mk, nil)
if err != nil {
return err
}
key := NewKeyBufferWithSuffix(HashKey, args[0], args[1]).Key()
res, err := DB.Get(DefaultReadOptions, key)
if err != nil {
return err
}
var current float64
if res != nil {
current, err = bconv.ParseFloat(res, 64)
if err != nil {
return fmt.Errorf("hash value is not a valid float")
}
}
increment, err := bconv.ParseFloat(args[2], 64)
if err != nil {
return fmt.Errorf("value is not a valid float")
}
result := strconv.AppendFloat(nil, current+increment, 'f', -1, 64)
wb.Put(key, result)
// if is a new key, increment the hash length
if res == nil {
setHlen(mk, length+1, wb)
}
return result
}
// This function exists to manually encode floats.
func (ts Timeseries) MarshalJSON() ([]byte, error) {
var buffer bytes.Buffer
var scratch [64]byte
buffer.WriteByte('{')
buffer.WriteString("\"tagset\":")
tagset, err := json.Marshal(ts.TagSet)
if err != nil {
return []byte{}, err
}
buffer.Write(tagset)
buffer.WriteByte(',')
buffer.WriteString("\"values\":")
buffer.WriteByte('[')
n := len(ts.Values)
for i := 0; i < n; i++ {
if i > 0 {
buffer.WriteByte(',')
}
f := ts.Values[i]
if math.IsInf(f, 1) {
buffer.WriteString("null") // TODO - positive infinity
} else if math.IsInf(f, -1) {
buffer.WriteString("null") // TODO - negative infinity
} else if math.IsNaN(f) {
buffer.WriteString("null")
} else {
b := strconv.AppendFloat(scratch[:0], f, 'g', -1, 64)
buffer.Write(b)
}
}
buffer.WriteByte(']')
buffer.WriteByte('}')
return buffer.Bytes(), err
}
func BuildValue(goval interface{}) (v Value, err error) {
switch bindVal := goval.(type) {
case nil:
// no op
case int:
v = Value{Numeric(strconv.AppendInt(nil, int64(bindVal), 10))}
case int32:
v = Value{Numeric(strconv.AppendInt(nil, int64(bindVal), 10))}
case int64:
v = Value{Numeric(strconv.AppendInt(nil, int64(bindVal), 10))}
case uint:
v = Value{Numeric(strconv.AppendUint(nil, uint64(bindVal), 10))}
case uint32:
v = Value{Numeric(strconv.AppendUint(nil, uint64(bindVal), 10))}
case uint64:
v = Value{Numeric(strconv.AppendUint(nil, uint64(bindVal), 10))}
case float64:
v = Value{Fractional(strconv.AppendFloat(nil, bindVal, 'f', -1, 64))}
case string:
v = Value{String([]byte(bindVal))}
case []byte:
v = Value{String(bindVal)}
case time.Time:
v = Value{String([]byte(bindVal.Format("'2006-01-02 15:04:05'")))}
case Numeric, Fractional, String:
v = Value{bindVal.(InnerValue)}
case Value:
v = bindVal
default:
return Value{}, fmt.Errorf("Unsupported bind variable type %T: %v", goval, goval)
}
return v, nil
}
func (e *jsonEncDriver) encodeFloat(f float64, numbits int) {
x := strconv.AppendFloat(e.b[:0], f, 'G', -1, numbits)
e.w.writeb(x)
if bytes.IndexByte(x, 'E') == -1 && bytes.IndexByte(x, '.') == -1 {
e.w.writen2('.', '0')
}
}
func MarshalRaw(results []*MetricData) []byte {
var b []byte
for _, r := range results {
b = append(b, r.GetName()...)
b = append(b, ',')
b = strconv.AppendInt(b, int64(r.GetStartTime()), 10)
b = append(b, ',')
b = strconv.AppendInt(b, int64(r.GetStopTime()), 10)
b = append(b, ',')
b = strconv.AppendInt(b, int64(r.GetStepTime()), 10)
b = append(b, '|')
var comma bool
for i, v := range r.Values {
if comma {
b = append(b, ',')
}
comma = true
if r.IsAbsent[i] {
b = append(b, "None"...)
} else {
b = strconv.AppendFloat(b, v, 'f', -1, 64)
}
}
b = append(b, '\n')
}
return b
}
func (c *conn) wBulkFloat64(f float64) (err error) {
b := strconv.AppendFloat([]byte{}, f, 'g', -1, 64)
l := len(b)
c.wLen('$', l)
c.bw.Write(b)
err = c.wCRLF()
return
}
func rwFloat64(dst jsWriter, src *Reader) (int, error) {
f, err := src.ReadFloat64()
if err != nil {
return 0, err
}
src.scratch = strconv.AppendFloat(src.scratch[:0], f, 'f', -1, 32)
return dst.Write(src.scratch)
}
func (bits floatEncoder) encode(e *encodeState, v reflect.Value) {
f := v.Float()
if math.IsInf(f, 0) || math.IsNaN(f) {
e.error(&UnsupportedValueError{v, strconv.FormatFloat(f, 'g', -1, int(bits))})
}
b := strconv.AppendFloat(e.scratch[:0], f, 'g', -1, int(bits))
e.Write(b)
}
// SampledDeltaFloat64 emits a 'sampled' float64 delta with the given rate.
func (c *Client) SampledDeltaFloat64(stat string, val float64, rate float32) error {
b := c.getbuf(stat)
if val > 0 {
b = append(b, '+')
}
b = strconv.AppendFloat(b, val, 'f', 10, 64)
return c.finishbuf(b, "|g", rate)
}
func dumpTextValue(mysqlType uint8, value interface{}) ([]byte, error) {
switch v := value.(type) {
case int8:
return strconv.AppendInt(nil, int64(v), 10), nil
case int16:
return strconv.AppendInt(nil, int64(v), 10), nil
case int32:
return strconv.AppendInt(nil, int64(v), 10), nil
case int64:
return strconv.AppendInt(nil, int64(v), 10), nil
case int:
return strconv.AppendInt(nil, int64(v), 10), nil
case uint8:
return strconv.AppendUint(nil, uint64(v), 10), nil
case uint16:
return strconv.AppendUint(nil, uint64(v), 10), nil
case uint32:
return strconv.AppendUint(nil, uint64(v), 10), nil
case uint64:
return strconv.AppendUint(nil, uint64(v), 10), nil
case uint:
return strconv.AppendUint(nil, uint64(v), 10), nil
case float32:
return strconv.AppendFloat(nil, float64(v), 'f', -1, 32), nil
case float64:
return strconv.AppendFloat(nil, float64(v), 'f', -1, 64), nil
case []byte:
return v, nil
case string:
return hack.Slice(v), nil
case mysql.Time:
return hack.Slice(v.String()), nil
case mysql.Duration:
return hack.Slice(v.String()), nil
case mysql.Decimal:
return hack.Slice(v.String()), nil
case mysql.Enum:
return hack.Slice(v.String()), nil
case mysql.Set:
return hack.Slice(v.String()), nil
case mysql.Bit:
return hack.Slice(v.ToString()), nil
default:
return nil, errors.Errorf("invalid type %T", value)
}
}
// GaugeSmpl is a statsd gauge, after sampling by Sample().
func (t *T) GaugeSmpl(k string, v float64) {
b := make([]byte, 0, len(k)+20)
b = append(b, []byte(k)...)
b = append(b, ':')
b = strconv.AppendFloat(b, v, 'f', 6, 64)
b = append(b, '|', 'g')
t.p <- b
}
// WriteFloat64 encodes and writes a 64-bit float.
func (e *encoder) WriteFloat64(v float64) error {
if err := e.check(); err != nil {
return err
}
buf := strconv.AppendFloat(e.buf[e.pos:e.pos], v, 'g', -1, 64)
e.pos += len(buf)
return nil
}