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core/rawdb: simplify the size counting

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This commit is contained in:
Gary Rong 2025-12-10 14:39:27 +08:00
parent 9c55041750
commit b40a9b85ad
1 changed files with 9 additions and 20 deletions
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27
core/rawdb/freezer_memory.go
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@ -91,15 +91,14 @@ func (t *memoryTable) truncateHead(items uint64) error {
if items < t.offset {
return errors.New("truncation below tail")
}
removeFrom := items - t.offset
for i := int(removeFrom); i < len(t.data); i++ {
for i := int(items - t.offset); i < len(t.data); i++ {
if t.size > uint64(len(t.data[i])) {
t.size -= uint64(len(t.data[i]))
} else {
t.size = 0
}
}
t.data = t.data[:removeFrom]
t.data = t.data[:items-t.offset]
t.items = items
return nil
}
@ -116,25 +115,15 @@ func (t *memoryTable) truncateTail(items uint64) error {
if t.items < items {
return errors.New("truncation above head")
}
drop := items - t.offset
var removed uint64
for i := uint64(0); i < drop; i++ {
removed += uint64(len(t.data[i]))
}
newLen := uint64(len(t.data)) - drop
if newLen == 0 {
t.data = nil
for i := uint64(0); i < items-t.offset; i++ {
if t.size > uint64(len(t.data[i])) {
t.size -= uint64(len(t.data[i]))
} else {
newData := make([][]byte, newLen)
copy(newData, t.data[drop:])
t.data = newData
}
t.offset = items
if removed >= t.size {
t.size = 0
} else {
t.size -= removed
}
}
t.data = t.data[items-t.offset:]
t.offset = items
return nil
}