59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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package exemplar // import "go.opentelemetry.io/otel/sdk/metric/internal/exemplar"
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import "math"
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// ValueType identifies the type of value used in exemplar data.
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type ValueType uint8
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const (
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// UnknownValueType should not be used. It represents a misconfigured
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// Value.
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UnknownValueType ValueType = 0
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// Int64ValueType represents a Value with int64 data.
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Int64ValueType ValueType = 1
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// Float64ValueType represents a Value with float64 data.
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Float64ValueType ValueType = 2
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)
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// Value is the value of data held by an exemplar.
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type Value struct {
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t ValueType
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val uint64
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}
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// NewValue returns a new [Value] for the provided value.
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func NewValue[N int64 | float64](value N) Value {
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switch v := any(value).(type) {
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case int64:
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return Value{t: Int64ValueType, val: uint64(v)}
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case float64:
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return Value{t: Float64ValueType, val: math.Float64bits(v)}
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}
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return Value{}
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}
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// Type returns the [ValueType] of data held by v.
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func (v Value) Type() ValueType { return v.t }
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// Int64 returns the value of v as an int64. If the ValueType of v is not an
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// Int64ValueType, 0 is returned.
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func (v Value) Int64() int64 {
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if v.t == Int64ValueType {
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// Assumes the correct int64 was stored in v.val based on type.
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return int64(v.val) // nolint: gosec
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}
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return 0
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}
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// Float64 returns the value of v as an float64. If the ValueType of v is not
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// an Float64ValueType, 0 is returned.
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func (v Value) Float64() float64 {
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if v.t == Float64ValueType {
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return math.Float64frombits(v.val)
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}
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return 0
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}
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