Remove hg dep

1 files changed, 76 insertions, 0 deletions

diff --git a/modules/mahonia/cp51932.go b/modules/mahonia/cp51932.go
new file mode 100644
index 0000000000..a8c3d00eee
--- /dev/null
+++ b/modules/mahonia/cp51932.go
@@ -0,0 +1,76 @@
+package mahonia
+
+import (
+	"unicode/utf8"
+)
+
+// Converters for Microsoft's version of the EUC-JP encoding
+
+func init() {
+	RegisterCharset(&Charset{
+		Name:    "cp51932",
+		Aliases: []string{"windows-51932"},
+		NewDecoder: func() Decoder {
+			return decodeCP51932
+		},
+		NewEncoder: func() Encoder {
+			msJISTable.Reverse()
+			return encodeCP51932
+		},
+	})
+}
+
+func decodeCP51932(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 0xa1 <= b && b <= 0xfe:
+		return msJISTable.DecodeHigh(p)
+	}
+
+	return utf8.RuneError, 1, INVALID_CHAR
+}
+
+func encodeCP51932(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
+	}
+
+	return msJISTable.EncodeHigh(p, c)
+}