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package ber
import (
"io"
)
func UnmarshalLen(r io.ByteReader) int {
b, _ := r.ReadByte()
if b&0x80 == 0 {
return int(b)
}
n := int(b & 0x7f)
var i int
for k := 0; k <= n; k++ {
b, _ := r.ReadByte()
i |= int(b) << uint(k*8)
}
return i
}
func unmarshalLen(b []byte) (i, n int) {
if b[0]&0x80 == 0 {
return int(b[0]), 1
}
n = int(b[0] & 0x7f)
for k := 0; k <= n; k++ {
i |= int(b[k]) << uint((k-1)*8)
}
return i, n + 1
}
func lenLen(i int) (n int) {
for ; i > 255; i >>= 8 {
n++
}
return n + 1
}
func MarshalLen(w io.ByteWriter, i int) {
if i < 0x80 {
w.WriteByte(byte(i))
return
}
n := lenLen(i)
w.WriteByte(byte(n) | 0x80)
for ; n > 0; n-- {
w.WriteByte(byte(i) >> uint(n-1) * 8)
}
return
}
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