1 files changed, 167 insertions, 0 deletions
diff --git a/vendor/open-telemetry/sdk/Metrics/Aggregation/ExplicitBucketHistogramAggregation.php b/vendor/open-telemetry/sdk/Metrics/Aggregation/ExplicitBucketHistogramAggregation.php
new file mode 100644
index 000000000..d68ecd830
--- /dev/null
+++ b/vendor/open-telemetry/sdk/Metrics/Aggregation/ExplicitBucketHistogramAggregation.php
@@ -0,0 +1,167 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\SDK\Metrics\Aggregation;
+
+use function array_fill;
+use function count;
+use const INF;
+use const NAN;
+use OpenTelemetry\Context\ContextInterface;
+use OpenTelemetry\SDK\Common\Attribute\AttributesInterface;
+use OpenTelemetry\SDK\Metrics\AggregationInterface;
+use OpenTelemetry\SDK\Metrics\Data;
+
+/**
+ * @implements AggregationInterface<ExplicitBucketHistogramSummary>
+ */
+final class ExplicitBucketHistogramAggregation implements AggregationInterface
+{
+    /**
+     * @var list<float|int>
+     * @readonly
+     */
+    public array $boundaries;
+
+    /**
+     * @param list<float|int> $boundaries strictly ascending histogram bucket boundaries
+     */
+    public function __construct(array $boundaries)
+    {
+        $this->boundaries = $boundaries;
+    }
+
+    public function initialize(): ExplicitBucketHistogramSummary
+    {
+        return new ExplicitBucketHistogramSummary(
+            0,
+            0,
+            +INF,
+            -INF,
+            array_fill(0, count($this->boundaries) + 1, 0),
+        );
+    }
+
+    /**
+     * @param ExplicitBucketHistogramSummary $summary
+     */
+    public function record($summary, $value, AttributesInterface $attributes, ContextInterface $context, int $timestamp): void
+    {
+        $boundariesCount = count($this->boundaries);
+        for ($i = 0; $i < $boundariesCount && $this->boundaries[$i] < $value; $i++) {
+        }
+        $summary->count++;
+        $summary->sum += $value;
+        $summary->min = self::min($value, $summary->min);
+        $summary->max = self::max($value, $summary->max);
+        $summary->buckets[$i]++;
+    }
+
+    /**
+     * @param ExplicitBucketHistogramSummary $left
+     * @param ExplicitBucketHistogramSummary $right
+     */
+    public function merge($left, $right): ExplicitBucketHistogramSummary
+    {
+        $count = $left->count + $right->count;
+        $sum = $left->sum + $right->sum;
+        $min = self::min($left->min, $right->min);
+        $max = self::max($left->max, $right->max);
+        $buckets = $right->buckets;
+        foreach ($left->buckets as $i => $bucketCount) {
+            $buckets[$i] += $bucketCount;
+        }
+
+        return new ExplicitBucketHistogramSummary(
+            $count,
+            $sum,
+            $min,
+            $max,
+            $buckets,
+        );
+    }
+
+    /**
+     * @param ExplicitBucketHistogramSummary $left
+     * @param ExplicitBucketHistogramSummary $right
+     */
+    public function diff($left, $right): ExplicitBucketHistogramSummary
+    {
+        $count = -$left->count + $right->count;
+        $sum = -$left->sum + $right->sum;
+        $min = $left->min > $right->min ? $right->min : NAN;
+        $max = $left->max < $right->max ? $right->max : NAN;
+        $buckets = $right->buckets;
+        foreach ($left->buckets as $i => $bucketCount) {
+            $buckets[$i] -= $bucketCount;
+        }
+
+        return new ExplicitBucketHistogramSummary(
+            $count,
+            $sum,
+            $min,
+            $max,
+            $buckets,
+        );
+    }
+
+    /**
+     * @param array<ExplicitBucketHistogramSummary> $summaries
+     */
+    public function toData(
+        array $attributes,
+        array $summaries,
+        array $exemplars,
+        int $startTimestamp,
+        int $timestamp,
+        $temporality
+    ): Data\Histogram {
+        $dataPoints = [];
+        foreach ($attributes as $key => $dataPointAttributes) {
+            if ($summaries[$key]->count === 0) {
+                continue;
+            }
+
+            $dataPoints[] = new Data\HistogramDataPoint(
+                $summaries[$key]->count,
+                $summaries[$key]->sum,
+                $summaries[$key]->min,
+                $summaries[$key]->max,
+                $summaries[$key]->buckets,
+                $this->boundaries,
+                $dataPointAttributes,
+                $startTimestamp,
+                $timestamp,
+                $exemplars[$key] ?? [],
+            );
+        }
+
+        return new Data\Histogram(
+            $dataPoints,
+            $temporality,
+        );
+    }
+
+    /**
+     * @param float|int $left
+     * @param float|int $right
+     * @return float|int
+     */
+    private static function min($left, $right)
+    {
+        /** @noinspection PhpConditionAlreadyCheckedInspection */
+        return $left <= $right ? $left : ($right <= $left ? $right : NAN);
+    }
+
+    /**
+     * @param float|int $left
+     * @param float|int $right
+     * @return float|int
+     */
+    private static function max($left, $right)
+    {
+        /** @noinspection PhpConditionAlreadyCheckedInspection */
+        return $left >= $right ? $left : ($right >= $left ? $right : NAN);
+    }
+}