package door
import "strings"
// I used iconv in door++, but it was horrible. It doesn't translate
// control codes to Unicode.
// This converts CP437 to Unicode for rendering in Unicode terminals
// like the linux telnet client.
// This does everything but: \x07, \x08, \x0a and \x0d.
// 0x07, 0x08, 0x09, 0x0a, 0x0c, 0x0d, 0x1b (ANSI spec)
func CP437_to_Unicode(cp437 string) string {
// var result string
var result strings.Builder
result.Grow(len(cp437))
for _, char := range []byte(cp437) {
// for _, char := range []rune(cp437) {
switch int(char) {
case 0x01:
result.WriteRune('\u263A')
case 0x02:
result.WriteRune('\u263B')
case 0x03:
result.WriteRune('\u2665')
case 0x04:
result.WriteRune('\u2666')
case 0x05:
result.WriteRune('\u2663')
case 0x06:
result.WriteRune('\u2660')
case 0x09:
result.WriteRune('\u25CB')
case 0x0b:
result.WriteRune('\u2642')
case 0x0c:
result.WriteRune('\u2640')
case 0x0e:
result.WriteRune('\u266B')
case 0x0f:
result.WriteRune('\u263C')
case 0x10:
result.WriteRune('\u25BA')
case 0x11:
result.WriteRune('\u25C4')
case 0x12:
result.WriteRune('\u2195')
case 0x13:
result.WriteRune('\u203C')
case 0x14:
result.Write([]byte{0xc2, 0xb6})
case 0x15:
result.Write([]byte{0xc2, 0xa7})
case 0x16:
result.WriteRune('\u25AC')
case 0x17:
result.WriteRune('\u21A8')
case 0x18:
result.WriteRune('\u2191')
case 0x19:
result.WriteRune('\u2193')
case 0x1a:
result.WriteRune('\u2192')
case 0x1c:
result.WriteRune('\u221F')
case 0x1d:
result.WriteRune('\u2194')
case 0x1e:
result.WriteRune('\u25B2')
case 0x1f:
result.WriteRune('\u25BC')
case 0x7f:
result.WriteRune('\u2302')
case 0x80:
result.Write([]byte{0xc3, 0x87})
case 0x81:
result.Write([]byte{0xc3, 0xbc})
case 0x82:
result.Write([]byte{0xc3, 0xa9})
case 0x83:
result.Write([]byte{0xc3, 0xa2})
case 0x84:
result.Write([]byte{0xc3, 0xa4})
case 0x85:
result.Write([]byte{0xc3, 0xa0})
case 0x86:
result.Write([]byte{0xc3, 0xa5})
case 0x87:
result.Write([]byte{0xc3, 0xa7})
case 0x88:
result.Write([]byte{0xc3, 0xaa})
case 0x89:
result.Write([]byte{0xc3, 0xab})
case 0x8a:
result.Write([]byte{0xc3, 0xa8})
case 0x8b:
result.Write([]byte{0xc3, 0xaf})
case 0x8c:
result.Write([]byte{0xc3, 0xae})
case 0x8d:
result.Write([]byte{0xc3, 0xac})
case 0x8e:
result.Write([]byte{0xc3, 0x84})
case 0x8f:
result.Write([]byte{0xc3, 0x85})
case 0x90:
result.Write([]byte{0xc3, 0x89})
case 0x91:
result.Write([]byte{0xc3, 0xa6})
case 0x92:
result.Write([]byte{0xc3, 0x86})
case 0x93:
result.Write([]byte{0xc3, 0xb4})
case 0x94:
result.Write([]byte{0xc3, 0xb6})
case 0x95:
result.Write([]byte{0xc3, 0xb2})
case 0x96:
result.Write([]byte{0xc3, 0xbb})
case 0x97:
result.Write([]byte{0xc3, 0xb9})
case 0x98:
result.Write([]byte{0xc3, 0xbf})
case 0x99:
result.Write([]byte{0xc3, 0x96})
case 0x9a:
result.Write([]byte{0xc3, 0x9c})
case 0x9b:
result.Write([]byte{0xc2, 0xa2})
case 0x9c:
result.Write([]byte{0xc2, 0xa3})
case 0x9d:
result.Write([]byte{0xc2, 0xa5})
case 0x9e:
result.WriteRune('\u20A7')
case 0x9f:
result.WriteRune('\u0192')
case 0xa0:
result.Write([]byte{0xc3, 0xa1})
case 0xa1:
result.Write([]byte{0xc3, 0xad})
case 0xa2:
result.Write([]byte{0xc3, 0xb3})
case 0xa3:
result.Write([]byte{0xc3, 0xba})
case 0xa4:
result.Write([]byte{0xc3, 0xb1})
case 0xa5:
result.Write([]byte{0xc3, 0x91})
case 0xa6:
result.Write([]byte{0xc2, 0xaa})
case 0xa7:
result.Write([]byte{0xc2, 0xba})
case 0xa8:
result.Write([]byte{0xc2, 0xbf})
case 0xa9:
result.WriteRune('\u2310')
case 0xaa:
result.Write([]byte{0xc2, 0xac})
case 0xab:
result.Write([]byte{0xc2, 0xbd})
case 0xac:
result.Write([]byte{0xc2, 0xbc})
case 0xad:
result.Write([]byte{0xc2, 0xa1})
case 0xae:
result.Write([]byte{0xc2, 0xab})
case 0xaf:
result.Write([]byte{0xc2, 0xbb})
case 0xb0:
result.WriteRune('\u2591')
case 0xb1:
result.WriteRune('\u2592')
case 0xb2:
result.WriteRune('\u2593')
case 0xb3:
result.WriteRune('\u2502')
case 0xb4:
result.WriteRune('\u2524')
case 0xb5:
result.WriteRune('\u2561')
case 0xb6:
result.WriteRune('\u2562')
case 0xb7:
result.WriteRune('\u2556')
case 0xb8:
result.WriteRune('\u2555')
case 0xb9:
result.WriteRune('\u2563')
case 0xba:
result.WriteRune('\u2551')
case 0xbb:
result.WriteRune('\u2557')
case 0xbc:
result.WriteRune('\u255D')
case 0xbd:
result.WriteRune('\u255C')
case 0xbe:
result.WriteRune('\u255B')
case 0xbf:
result.WriteRune('\u2510')
case 0xc0:
result.WriteRune('\u2514')
case 0xc1:
result.WriteRune('\u2534')
case 0xc2:
result.WriteRune('\u252C')
case 0xc3:
result.WriteRune('\u251C')
case 0xc4:
result.WriteRune('\u2500')
case 0xc5:
result.WriteRune('\u253C')
case 0xc6:
result.WriteRune('\u255E')
case 0xc7:
result.WriteRune('\u255F')
case 0xc8:
result.WriteRune('\u255A')
case 0xc9:
result.WriteRune('\u2554')
case 0xca:
result.WriteRune('\u2569')
case 0xcb:
result.WriteRune('\u2566')
case 0xcc:
result.WriteRune('\u2560')
case 0xcd:
result.WriteRune('\u2550')
case 0xce:
result.WriteRune('\u256C')
case 0xcf:
result.WriteRune('\u2567')
case 0xd0:
result.WriteRune('\u2568')
case 0xd1:
result.WriteRune('\u2564')
case 0xd2:
result.WriteRune('\u2565')
case 0xd3:
result.WriteRune('\u2559')
case 0xd4:
result.WriteRune('\u2558')
case 0xd5:
result.WriteRune('\u2552')
case 0xd6:
result.WriteRune('\u2553')
case 0xd7:
result.WriteRune('\u256B')
case 0xd8:
result.WriteRune('\u256A')
case 0xd9:
result.WriteRune('\u2518')
case 0xda:
result.WriteRune('\u250C')
case 0xdb:
result.WriteRune('\u2588')
case 0xdc:
result.WriteRune('\u2584')
case 0xdd:
result.WriteRune('\u258C')
case 0xde:
result.WriteRune('\u2590')
case 0xdf:
result.WriteRune('\u2580')
case 0xe0:
result.WriteRune('\u03B1')
case 0xe1:
result.Write([]byte{0xc3, 0x9f})
case 0xe2:
result.WriteRune('\u0393')
case 0xe3:
result.WriteRune('\u03C0')
case 0xe4:
result.WriteRune('\u03A3')
case 0xe5:
result.WriteRune('\u03C3')
case 0xe6:
result.Write([]byte{0xc2, 0xb5})
case 0xe7:
result.WriteRune('\u03C4')
case 0xe8:
result.WriteRune('\u03A6')
case 0xe9:
result.WriteRune('\u0398')
case 0xea:
result.WriteRune('\u03A9')
case 0xeb:
result.WriteRune('\u03B4')
case 0xec:
result.WriteRune('\u221E')
case 0xed:
result.WriteRune('\u03C6')
case 0xee:
result.WriteRune('\u03B5')
case 0xef:
result.WriteRune('\u2229')
case 0xf0:
result.WriteRune('\u2261')
case 0xf1:
result.Write([]byte{0xc2, 0xb1})
case 0xf2:
result.WriteRune('\u2265')
case 0xf3:
result.WriteRune('\u2264')
case 0xf4:
result.WriteRune('\u2320')
case 0xf5:
result.WriteRune('\u2321')
case 0xf6:
result.Write([]byte{0xc3, 0xb7})
case 0xf7:
result.WriteRune('\u2248')
case 0xf8:
result.Write([]byte{0xc2, 0xb0})
case 0xf9:
result.WriteRune('\u2219')
case 0xfa:
result.Write([]byte{0xc2, 0xb7})
case 0xfb:
result.WriteRune('\u221A')
case 0xfc:
result.WriteRune('\u207F')
case 0xfd:
result.Write([]byte{0xc2, 0xb2})
case 0xfe:
result.WriteRune('\u25A0')
case 0xff:
result.Write([]byte{0xc2, 0xa0})
default:
result.WriteByte(byte(char))
}
}
return result.String()
}