diff options
Diffstat (limited to 'rlp/encode.go')
| -rw-r--r-- | rlp/encode.go | 42 |
1 files changed, 0 insertions, 42 deletions
diff --git a/rlp/encode.go b/rlp/encode.go index dddde766f..a9f80d448 100644 --- a/rlp/encode.go +++ b/rlp/encode.go @@ -29,48 +29,6 @@ type Encoder interface { EncodeRLP(io.Writer) error } -// Flat wraps a value (which must encode as a list) so -// it encodes as the list's elements. -// -// Example: suppose you have defined a type -// -// type foo struct { A, B uint } -// -// Under normal encoding rules, -// -// rlp.Encode(foo{1, 2}) --> 0xC20102 -// -// This function can help you achieve the following encoding: -// -// rlp.Encode(rlp.Flat(foo{1, 2})) --> 0x0102 -func Flat(val interface{}) Encoder { - return flatenc{val} -} - -type flatenc struct{ val interface{} } - -func (e flatenc) EncodeRLP(out io.Writer) error { - // record current output position - var ( - eb = out.(*encbuf) - prevstrsize = len(eb.str) - prevnheads = len(eb.lheads) - ) - if err := eb.encode(e.val); err != nil { - return err - } - // check that a new list header has appeared - if len(eb.lheads) == prevnheads || eb.lheads[prevnheads].offset == prevstrsize-1 { - return fmt.Errorf("rlp.Flat: %T did not encode as list", e.val) - } - // remove the new list header - newhead := eb.lheads[prevnheads] - copy(eb.lheads[prevnheads:], eb.lheads[prevnheads+1:]) - eb.lheads = eb.lheads[:len(eb.lheads)-1] - eb.lhsize -= headsize(uint64(newhead.size)) - return nil -} - // Encode writes the RLP encoding of val to w. Note that Encode may // perform many small writes in some cases. Consider making w // buffered. |