vendor/golang.org/x/text/encoding/korean/euckr.go

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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package korean

import (
	"unicode/utf8"

	"golang.org/x/text/encoding"
	"golang.org/x/text/encoding/internal"
	"golang.org/x/text/encoding/internal/identifier"
	"golang.org/x/text/transform"
)

// All is a list of all defined encodings in this package.
var All = []encoding.Encoding{EUCKR}

// EUCKR is the EUC-KR encoding, also known as Code Page 949.
var EUCKR encoding.Encoding = &eucKR

var eucKR = internal.Encoding{
	&internal.SimpleEncoding{eucKRDecoder{}, eucKREncoder{}},
	"EUC-KR",
	identifier.EUCKR,
}

type eucKRDecoder struct{ transform.NopResetter }

func (eucKRDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
	r, size := rune(0), 0
loop:
	for ; nSrc < len(src); nSrc += size {
		switch c0 := src[nSrc]; {
		case c0 < utf8.RuneSelf:
			r, size = rune(c0), 1

		case 0x81 <= c0 && c0 < 0xff:
			if nSrc+1 >= len(src) {
				if !atEOF {
					err = transform.ErrShortSrc
					break loop
				}
				r, size = utf8.RuneError, 1
				break
			}
			c1 := src[nSrc+1]
			size = 2
			if c0 < 0xc7 {
				r = 178 * rune(c0-0x81)
				switch {
				case 0x41 <= c1 && c1 < 0x5b:
					r += rune(c1) - (0x41 - 0*26)
				case 0x61 <= c1 && c1 < 0x7b:
					r += rune(c1) - (0x61 - 1*26)
				case 0x81 <= c1 && c1 < 0xff:
					r += rune(c1) - (0x81 - 2*26)
				default:
					goto decError
				}