Remove hg dep

modules/mahonia/euc-jp.go

@@ -0,0 +1,102 @@
+package mahonia
+
+import (
+	"unicode/utf8"
+)
+
+// Converters for the EUC-JP encoding
+
+func init() {
+	RegisterCharset(&Charset{
+		Name:    "EUC-JP",
+		Aliases: []string{"extended_unix_code_packed_format_for_japanese", "cseucpkdfmtjapanese"},
+		NewDecoder: func() Decoder {
+			return decodeEucJP
+		},
+		NewEncoder: func() Encoder {
+			jis0208Table.Reverse()
+			jis0212Table.Reverse()
+			return encodeEucJP
+		},
+	})
+}
+
+func decodeEucJP(p []byte) (c rune, size int, status Status) {
+	if len(p) == 0 {
+		return 0, 0, NO_ROOM
+	}
+
+	b := p[0]
+	switch {
+	case b < 0x80:
+		return rune(b), 1, SUCCESS
+
+	case b == 0x8e:
+		if len(p) < 2 {
+			return 0, 0, NO_ROOM
+		}
+		b2 := p[1]
+		if b2 < 0xa1 || b2 > 0xdf {
+			return utf8.RuneError, 1, INVALID_CHAR
+		}
+		return rune(b2) + (0xff61 - 0xa1), 2, SUCCESS
+
+	case b == 0x8f:
+		if len(p) < 3 {
+			return 0, 0, NO_ROOM
+		}
+		c, size, status = jis0212Table.DecodeHigh(p[1:3])
+		if status == SUCCESS {
+			size = 3
+		}
+		return
+
+	case 0xa1 <= b && b <= 0xfe:
+		return jis0208Table.DecodeHigh(p)
+	}
+
+	return utf8.RuneError, 1, INVALID_CHAR
+}
+
+func encodeEucJP(p []byte, c rune) (size int, status Status) {
+	if len(p) == 0 {
+		return 0, NO_ROOM
+	}
+
+	if c < 0x80 {
+		p[0] = byte(c)
+		return 1, SUCCESS
+	}
+
+	if len(p) < 2 {
+		return 0, NO_ROOM
+	}
+
+	if c > 0xffff {
+		p[0] = '?'
+		return 1, INVALID_CHAR
+	}
+
+	if 0xff61 <= c && c <= 0xff9f {
+		p[0] = 0x8e
+		p[1] = byte(c - (0xff61 - 0xa1))
+		return 2, SUCCESS
+	}
+
+	size, status = jis0208Table.EncodeHigh(p, c)
+	if status == SUCCESS {
+		return size, status
+	}
+
+	size, status = jis0212Table.EncodeHigh(p[1:], c)
+	switch status {
+	case SUCCESS:
+		p[0] = 0x8f
+		return size + 1, SUCCESS
+
+	case INVALID_CHAR:
+		p[0] = '?'
+		return 1, INVALID_CHAR
+	}
+	return size, status
+}