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Improve UVariantLen

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Hellojack 2023-04-21 10:47:17 +08:00 • committed by GitHub
parent 72471d9b35
commit 2fc9c6028c
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1 changed files with 21 additions and 5 deletions
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26
common/rw/varinat.go → common/rw/varint.go
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@ -27,12 +27,28 @@ func ReadUVariant(reader io.Reader) (uint64, error) {
} }
func UVariantLen(x uint64) int { func UVariantLen(x uint64) int {
i := 0 switch {
for x >= 0x80 { case x < 1<<(7*1):
x >>= 7 return 1
i++ case x < 1<<(7*2):
return 2
case x < 1<<(7*3):
return 3
case x < 1<<(7*4):
return 4
case x < 1<<(7*5):
return 5
case x < 1<<(7*6):
return 6
case x < 1<<(7*7):
return 7
case x < 1<<(7*8):
return 8
case x < 1<<(7*9):
return 9
default:
return 10
} }
return i + 1
} }
func WriteUVariant(writer io.Writer, value uint64) error { func WriteUVariant(writer io.Writer, value uint64) error {