podman

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// Copyright 2016 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//     http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package profile
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import (
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	"fmt"
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	"strconv"
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	"strings"
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)
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// SampleIndexByName returns the appropriate index for a value of sample index.
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// If numeric, it returns the number, otherwise it looks up the text in the
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// profile sample types.
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func (p *Profile) SampleIndexByName(sampleIndex string) (int, error) {
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	if sampleIndex == "" {
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		if dst := p.DefaultSampleType; dst != "" {
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			for i, t := range sampleTypes(p) {
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				if t == dst {
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					return i, nil
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				}
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			}
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		}
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		// By default select the last sample value
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		return len(p.SampleType) - 1, nil
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	}
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	if i, err := strconv.Atoi(sampleIndex); err == nil {
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		if i < 0 || i >= len(p.SampleType) {
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			return 0, fmt.Errorf("sample_index %s is outside the range [0..%d]", sampleIndex, len(p.SampleType)-1)
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		}
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		return i, nil
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	}
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	// Remove the inuse_ prefix to support legacy pprof options
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	// "inuse_space" and "inuse_objects" for profiles containing types
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	// "space" and "objects".
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	noInuse := strings.TrimPrefix(sampleIndex, "inuse_")
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	for i, t := range p.SampleType {
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		if t.Type == sampleIndex || t.Type == noInuse {
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			return i, nil
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		}
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	}
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	return 0, fmt.Errorf("sample_index %q must be one of: %v", sampleIndex, sampleTypes(p))
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}
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func sampleTypes(p *Profile) []string {
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	types := make([]string, len(p.SampleType))
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	for i, t := range p.SampleType {
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		types[i] = t.Type
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	}
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	return types
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}
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