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-rw-r--r--ber/len.go12
1 files changed, 12 insertions, 0 deletions
diff --git a/ber/len.go b/ber/len.go
new file mode 100644
index 0000000..aea9965
--- /dev/null
+++ b/ber/len.go
@@ -0,0 +1,12 @@
+package ber
+
+func UnmarshalLen(b []byte) (i, n int) {
+ if b[0]&0x80 == 0 {
+ return int(b[0]), 1
+ }
+ n = int(b[0]&0x7f)
+ for k := n; k > 0; k-- {
+ i += int(b[k]) << uint((k-1)*8)
+ }
+ return i, n
+}