VictoriaMetrics/lib/protoparser/opentelemetry/pb/helpers.go

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package pb
import (
"encoding/base64"
"encoding/json"
"fmt"
"math"
"strconv"
)
// FormatString returns string reperesentation for av.
func (av *AnyValue) FormatString() string {
if av == nil {
return ""
}
switch {
case av.StringValue != nil:
return *av.StringValue
case av.BoolValue != nil:
return strconv.FormatBool(*av.BoolValue)
case av.IntValue != nil:
return strconv.FormatInt(*av.IntValue, 10)
case av.DoubleValue != nil:
return float64AsString(*av.DoubleValue)
case av.ArrayValue != nil:
jsonStr, _ := json.Marshal(av.ArrayValue.Values)
return string(jsonStr)
case av.KeyValueList != nil:
jsonStr, _ := json.Marshal(av.KeyValueList.Values)
return string(jsonStr)
case av.BytesValue != nil:
return base64.StdEncoding.EncodeToString(*av.BytesValue)
default:
return ""
}
}
func float64AsString(f float64) string {
if math.IsInf(f, 0) || math.IsNaN(f) {
return fmt.Sprintf("json: unsupported value: %s", strconv.FormatFloat(f, 'g', -1, 64))
}
// Convert as if by ES6 number to string conversion.
// This matches most other JSON generators.
// See golang.org/issue/6384 and golang.org/issue/14135.
// Like fmt %g, but the exponent cutoffs are different
// and exponents themselves are not padded to two digits.
scratch := [64]byte{}
b := scratch[:0]
abs := math.Abs(f)
fmt := byte('f')
if abs != 0 && (abs < 1e-6 || abs >= 1e21) {
fmt = 'e'
}
b = strconv.AppendFloat(b, f, fmt, -1, 64)
if fmt == 'e' {
// clean up e-09 to e-9
n := len(b)
if n >= 4 && b[n-4] == 'e' && b[n-3] == '-' && b[n-2] == '0' {
b[n-2] = b[n-1]
b = b[:n-1]
}
}
return string(b)
}