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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| package quicvarint | ||
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|
||
| import "fmt" | ||
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|
||
| // taken from the QUIC draft | ||
| const ( | ||
| // Min is the minimum value allowed for a QUIC varint. | ||
| Min = 0 | ||
|
|
||
| // Max is the maximum allowed value for a QUIC varint (2^62-1). | ||
| Max = maxVarInt8 | ||
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| maxVarInt1 = 63 | ||
| maxVarInt2 = 16383 | ||
| maxVarInt4 = 1073741823 | ||
| maxVarInt8 = 4611686018427387903 | ||
| ) | ||
|
|
||
| func Append(b []byte, i uint64) []byte { | ||
| if i <= maxVarInt1 { | ||
| return append(b, uint8(i)) | ||
| } | ||
| if i <= maxVarInt2 { | ||
| return append(b, []byte{uint8(i>>8) | 0x40, uint8(i)}...) | ||
| } | ||
| if i <= maxVarInt4 { | ||
| return append(b, []byte{uint8(i>>24) | 0x80, uint8(i >> 16), uint8(i >> 8), uint8(i)}...) | ||
| } | ||
| if i <= maxVarInt8 { | ||
| return append(b, []byte{ | ||
| uint8(i>>56) | 0xc0, uint8(i >> 48), uint8(i >> 40), uint8(i >> 32), | ||
| uint8(i >> 24), uint8(i >> 16), uint8(i >> 8), uint8(i), | ||
| }...) | ||
| } | ||
| panic(fmt.Sprintf("%#x doesn't fit into 62 bits", i)) | ||
| } |
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