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This commit is contained in:
Dima Gordenko
2026-06-15 05:32:15 +03:00
parent 80309aab99
commit ca125c99d2
16 changed files with 685 additions and 1350 deletions
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99
atree/cursor.go
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@@ -4,6 +4,7 @@ import (
"errors"
"fmt"
"gordenko.dev/dima/bin"
"gordenko.dev/dima/qb"
)
@@ -118,69 +119,69 @@ func (s *BackwardCursor) Close() {
// HELPER
func (s *BackwardCursor) makeDecompressors() error {
// timestampsSize, _ := bin.GetUint16(s.pageData[timestampsSizeIdx:])
// valuesSize, _ := bin.GetUint16(s.pageData[valuesSizeIdx:])
timestampsSize, _ := bin.GetUint16(s.pageData[timestampsSizeIdx:])
valuesSize, _ := bin.GetUint16(s.pageData[valuesSizeIdx:])
// payloadSize := timestampsSize + valuesSize
payloadSize := timestampsSize + valuesSize
// if payloadSize > dataFooterIdx {
// return fmt.Errorf("corrupted data page %d: timestamps + values size %d gt payload size",
// s.pageNo, payloadSize)
// }
if payloadSize > dataFooterIdx {
return fmt.Errorf("corrupted data page %d: timestamps + values size %d gt payload size",
s.pageNo, payloadSize)
}
// s.timestampDecompressor = enc.NewTimeDeltaDecompressor(
// s.pageData[:timestampsSize],
// )
s.timestampDecompressor = enc.NewTimeDeltaDecompressor(
s.pageData[:timestampsSize],
)
// vbuf := s.pageData[timestampsSize : timestampsSize+valuesSize]
vbuf := s.pageData[timestampsSize : timestampsSize+valuesSize]
// switch s.metricType {
// case qb.Instant:
// s.valueDecompressor = enc.NewInstantDeltaDecompressor(
// vbuf, s.fracDigits)
switch s.metricType {
case qb.Instant:
s.valueDecompressor = enc.NewInstantDeltaDecompressor(
vbuf, s.fracDigits)
// case qb.Cumulative:
// s.valueDecompressor = enc.NewCumulativeDeltaDecompressor(
// vbuf, s.fracDigits)
case qb.Cumulative:
s.valueDecompressor = enc.NewCumulativeDeltaDecompressor(
vbuf, s.fracDigits)
// default:
// return fmt.Errorf("bug: wrong metricType %d", s.metricType)
// }
default:
return fmt.Errorf("bug: wrong metricType %d", s.metricType)
}
return nil
}
func makeDecompressors(pageData []byte, metricType qb.MetricType, fracDigits byte) (
qb.TimestampDecompressor, qb.ValueDecompressor, error,
) {
// timestampsSize, _ := bin.GetUint16(pageData[timestampsSizeIdx:])
// valuesSize, _ := bin.GetUint16(pageData[valuesSizeIdx:])
// func makeDecompressors(pageData []byte, metricType qb.MetricType, fracDigits byte) (
// qb.TimestampDecompressor, qb.ValueDecompressor, error,
// ) {
// timestampsSize, _ := bin.GetUint16(pageData[timestampsSizeIdx:])
// valuesSize, _ := bin.GetUint16(pageData[valuesSizeIdx:])
// payloadSize := timestampsSize + valuesSize
// payloadSize := timestampsSize + valuesSize
// if payloadSize > dataFooterIdx {
// return nil, nil, fmt.Errorf("corrupted: timestamps + values size %d > payload size",
// payloadSize)
// }
// if payloadSize > dataFooterIdx {
// return nil, nil, fmt.Errorf("corrupted: timestamps + values size %d > payload size",
// payloadSize)
// }
// timestampDecompressor := enc.NewTimeDeltaDecompressor(
// pageData[:timestampsSize],
// )
// timestampDecompressor := enc.NewTimeDeltaDecompressor(
// pageData[:timestampsSize],
// )
// vbuf := pageData[timestampsSize : timestampsSize+valuesSize]
// vbuf := pageData[timestampsSize : timestampsSize+valuesSize]
// var valueDecompressor qb.ValueDecompressor
// switch metricType {
// case qb.Instant:
// valueDecompressor = enc.NewInstantDeltaDecompressor(
// vbuf, fracDigits)
// var valueDecompressor qb.ValueDecompressor
// switch metricType {
// case qb.Instant:
// valueDecompressor = enc.NewInstantDeltaDecompressor(
// vbuf, fracDigits)
// case qb.Cumulative:
// valueDecompressor = enc.NewCumulativeDeltaDecompressor(
// vbuf, fracDigits)
// case qb.Cumulative:
// valueDecompressor = enc.NewCumulativeDeltaDecompressor(
// vbuf, fracDigits)
// default:
// return nil, nil, fmt.Errorf("bug: wrong metricType %d", metricType)
// }
//return timestampDecompressor, valueDecompressor, nil
return nil, nil, nil
}
// default:
// return nil, nil, fmt.Errorf("bug: wrong metricType %d", metricType)
// }
//return timestampDecompressor, valueDecompressor, nil
// return nil, nil, nil
// }