lib/encoder: add Semicolon encoding

docs/content/overview.md

@@ -327,6 +327,7 @@ will show you the defaults for the backends.
 | RightCrLfHtVt | CR 0x0D, LF 0x0A, HT 0x09, VT 0x0B on the right of a string |
 | RightPeriod | `.` on the right of a string |
 | RightSpace | SPACE on the right of a string |
+| Semicolon | `;` |
 | SingleQuote | `'` |
 | Slash | `/` |
 | SquareBracket | `[`, `]` |

lib/encoder/encoder.go

@@ -64,6 +64,7 @@ const (
 	EncodeInvalidUtf8                            // Invalid UTF-8 bytes
 	EncodeDot                                    // . and .. names
 	EncodeSquareBracket                          // []
+	EncodeSemicolon                              // ;
 
 	// Synthetic
 	EncodeWin         = EncodeColon | EncodeQuestion | EncodeDoubleQuote | EncodeAsterisk | EncodeLtGt | EncodePipe // :?"*<>|
@@ -122,6 +123,7 @@ func init() {
 	alias("Slash", EncodeSlash)
 	alias("LtGt", EncodeLtGt)
 	alias("SquareBracket", EncodeSquareBracket)
+	alias("Semicolon", EncodeSemicolon)
 	alias("DoubleQuote", EncodeDoubleQuote)
 	alias("SingleQuote", EncodeSingleQuote)
 	alias("BackQuote", EncodeBackQuote)
@@ -324,6 +326,12 @@ func (mask MultiEncoder) Encode(in string) string {
 					return true
 				}
 			}
+			if mask.Has(EncodeSemicolon) { // ;
+				switch r {
+				case ';', '；':
+					return true
+				}
+			}
 			if mask.Has(EncodeQuestion) { // ?
 				switch r {
 				case '?',
@@ -493,6 +501,17 @@ func (mask MultiEncoder) Encode(in string) string {
 				continue
 			}
 		}
+		if mask.Has(EncodeSemicolon) { // ;
+			switch r {
+			case ';':
+				out.WriteRune(r + fullOffset)
+				continue
+			case '；':
+				out.WriteRune(QuoteRune)
+				out.WriteRune(r)
+				continue
+			}
+		}
 		if mask.Has(EncodeQuestion) { // ?
 			switch r {
 			case '?':
@@ -739,6 +758,12 @@ func (mask MultiEncoder) Decode(in string) string {
 					return true
 				}
 			}
+			if mask.Has(EncodeSemicolon) { // ;
+				switch r {
+				case '；':
+					return true
+				}
+			}
 
 			if mask.Has(EncodeQuestion) { // ?
 				switch r {
@@ -895,6 +920,17 @@ func (mask MultiEncoder) Decode(in string) string {
 				continue
 			}
 		}
+		if mask.Has(EncodeSemicolon) { // ;
+			switch r {
+			case '；':
+				if unquote {
+					out.WriteRune(r)
+				} else {
+					out.WriteRune(r - fullOffset)
+				}
+				continue
+			}
+		}
 		if mask.Has(EncodeQuestion) { // ?
 			switch r {
 			case '？':

lib/encoder/internal/gen/main.go

@@ -43,6 +43,7 @@ var maskBits = []struct {
 	{encoder.EncodeBackQuote, "EncodeBackQuote"},
 	{encoder.EncodeLtGt, "EncodeLtGt"},
 	{encoder.EncodeSquareBracket, "EncodeSquareBracket"},
+	{encoder.EncodeSemicolon, "EncodeSemicolon"},
 	{encoder.EncodeDollar, "EncodeDollar"},
 	{encoder.EncodeDoubleQuote, "EncodeDoubleQuote"},
 	{encoder.EncodeColon, "EncodeColon"},
@@ -111,6 +112,11 @@ var allMappings = []mapping{{
 	}, []rune{
 		'［', '］',
 	}}, {
+	encoder.EncodeSemicolon, []rune{
+		';',
+	}, []rune{
+		'；',
+	}}, {
 	encoder.EncodeDoubleQuote, []rune{
 		'"',
 	}, []rune{