traefik/vendor/gopkg.in/DataDog/dd-trace-go.v1/ddtrace/tracer/util.go

package tracer

import (
	"strconv"
	"strings"
)

// toFloat64 attempts to convert value into a float64. If it succeeds it returns
// the value and true, otherwise 0 and false.
func toFloat64(value interface{}) (f float64, ok bool) {
	switch i := value.(type) {
	case byte:
		return float64(i), true
	case float32:
		return float64(i), true
	case float64:
		return i, true
	case int:
		return float64(i), true
	case int16:
		return float64(i), true
	case int32:
		return float64(i), true
	case int64:
		return float64(i), true
	case uint:
		return float64(i), true
	case uint16:
		return float64(i), true
	case uint32:
		return float64(i), true
	case uint64:
		return float64(i), true
	default:
		return 0, false
	}
}

// parseUint64 parses a uint64 from either an unsigned 64 bit base-10 string
// or a signed 64 bit base-10 string representing an unsigned integer
func parseUint64(str string) (uint64, error) {
	if strings.HasPrefix(str, "-") {
		id, err := strconv.ParseInt(str, 10, 64)
		if err != nil {
			return 0, err
		}
		return uint64(id), nil
	}
	return strconv.ParseUint(str, 10, 64)
}