mirror of
https://github.com/mandiant/gopacket
synced 2026-06-21 13:57:02 +00:00
Jacob Paullus
71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
// Copyright 2026 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package utf16le
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import (
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"encoding/binary"
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"unicode/utf16"
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)
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var (
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le = binary.LittleEndian
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)
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func EncodedStringLen(s string) int {
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l := 0
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for _, r := range s {
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if 0x10000 <= r && r <= '\U0010FFFF' {
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l += 4
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} else {
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l += 2
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}
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}
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return l
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}
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func EncodeString(dst []byte, src string) int {
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ws := utf16.Encode([]rune(src))
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for i, w := range ws {
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le.PutUint16(dst[2*i:2*i+2], w)
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}
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return len(ws) * 2
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}
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func EncodeStringToBytes(s string) []byte {
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if len(s) == 0 {
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return nil
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}
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ws := utf16.Encode([]rune(s))
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bs := make([]byte, len(ws)*2)
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for i, w := range ws {
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le.PutUint16(bs[2*i:2*i+2], w)
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}
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return bs
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}
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func DecodeToString(bs []byte) string {
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if len(bs) == 0 {
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return ""
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}
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ws := make([]uint16, len(bs)/2)
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for i := range ws {
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ws[i] = le.Uint16(bs[2*i : 2*i+2])
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}
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if len(ws) > 0 && ws[len(ws)-1] == 0 {
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ws = ws[:len(ws)-1]
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}
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return string(utf16.Decode(ws))
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}
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