Method addHistogram

src/go/pkg/prometheus/parse.go:336–373

(value float64)

}

func (p *promTextParser) addHistogram(value float64) {
	hash := p.currSeries.Hash()

	p.currSeries, _, _ = removeLabel(p.currSeries, labels.MetricName)

	h, ok := p.histograms[hash]
	if !ok {
		if v := len(p.currMF.metrics); v == cap(p.currMF.metrics) {
			h = &Histogram{}
			p.currMF.metrics = append(p.currMF.metrics, Metric{
				labels:    copyLabels(p.currSeries),
				histogram: h,
			})
		} else {
			p.currMF.metrics = p.currMF.metrics[:v+1]
			if p.currMF.metrics[v].histogram == nil {
				p.currMF.metrics[v].histogram = &Histogram{}
			}
			p.currMF.metrics[v].histogram.sum = 0
			p.currMF.metrics[v].histogram.count = 0
			p.currMF.metrics[v].histogram.buckets = p.currMF.metrics[v].histogram.buckets[:0]
			p.currMF.metrics[v].labels = p.currMF.metrics[v].labels[:0]
			p.currMF.metrics[v].labels = append(p.currMF.metrics[v].labels, p.currSeries...)
			h = p.currMF.metrics[v].histogram
		}

		p.histograms[hash] = h
	}

	switch {
	case p.isBucket:
		h.buckets = append(h.buckets, Bucket{upperBound: p.currBucket, cumulativeCount: value})
	case p.isSum:
		h.sum = value
	case p.isCount:
		h.count = value
	}
}

func (p *promTextParser) reset() {
	p.currMF = nil