37 lines
1016 B
Go
37 lines
1016 B
Go
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build !amd64 gccgo appengine
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package hex
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// RawEncode encodes src into EncodedLen(len(src))
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// bytes of dst. As a convenience, it returns the number
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// of bytes written to dst, but this value is always EncodedLen(len(src)).
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// RawEncode implements hexadecimal encoding for a given alphabet.
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func RawEncode(dst, src, alpha []byte) int {
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if len(alpha) != 16 {
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panic("invalid alphabet")
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}
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encodeGeneric(dst, src, alpha)
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return len(src) * 2
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}
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// Decode decodes src into DecodedLen(len(src)) bytes, returning the actual
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// number of bytes written to dst.
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//
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// If Decode encounters invalid input, it returns an error describing the failure.
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func Decode(dst, src []byte) (int, error) {
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if len(src)%2 == 1 {
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return 0, errLength
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}
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if n, ok := decodeGeneric(dst, src); !ok {
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return 0, InvalidByteError(src[n])
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}
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return len(src) / 2, nil
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}
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