package encoding/binary
PutUvarint encodes a uint64 into buf(1st parameter) and returns the number of bytes written. If the buffer is too small, PutUvarint will panic.
Golang encoding/binary.PutUvarint() function usage example
func encodeBlockHandle(dst []byte, b blockHandle) int {
n := binary.PutUvarint(dst, b.offset)
m := binary.PutUvarint(dst[n:], b.length)
return n + m
}
References :
http://golang.org/pkg/encoding/binary/#PutUvarint
https://github.com/syndtr/goleveldb/blob/master/leveldb/table/table.go
