gtsocial-umbx

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hex_other.go (1016B)

      1 // Copyright 2009 The Go Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style
      3 // license that can be found in the LICENSE file.
      4 
      5 // +build !amd64 gccgo appengine
      6 
      7 package hex
      8 
      9 // RawEncode encodes src into EncodedLen(len(src))
     10 // bytes of dst.  As a convenience, it returns the number
     11 // of bytes written to dst, but this value is always EncodedLen(len(src)).
     12 // RawEncode implements hexadecimal encoding for a given alphabet.
     13 func RawEncode(dst, src, alpha []byte) int {
     14 	if len(alpha) != 16 {
     15 		panic("invalid alphabet")
     16 	}
     17 
     18 	encodeGeneric(dst, src, alpha)
     19 	return len(src) * 2
     20 }
     21 
     22 // Decode decodes src into DecodedLen(len(src)) bytes, returning the actual
     23 // number of bytes written to dst.
     24 //
     25 // If Decode encounters invalid input, it returns an error describing the failure.
     26 func Decode(dst, src []byte) (int, error) {
     27 	if len(src)%2 == 1 {
     28 		return 0, errLength
     29 	}
     30 
     31 	if n, ok := decodeGeneric(dst, src); !ok {
     32 		return 0, InvalidByteError(src[n])
     33 	}
     34 
     35 	return len(src) / 2, nil
     36 }