doorgo/convert.go

package main

// 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

	for _, char := range []byte(cp437) {
		// for _, char := range []rune(cp437) {
		switch int(char) {
		case 0x01:
			result += "\u263A"
		case 0x02:
			result += "\u263B"
		case 0x03:
			result += "\u2665"
		case 0x04:
			result += "\u2666"
		case 0x05:
			result += "\u2663"
		case 0x06:
			result += "\u2660"
		case 0x09:
			result += "\u25CB"
		case 0x0b:
			result += "\u2642"
		case 0x0c:
			result += "\u2640"
		case 0x0e:
			result += "\u266B"
		case 0x0f:
			result += "\u263C"
		case 0x10:
			result += "\u25BA"
		case 0x11:
			result += "\u25C4"
		case 0x12:
			result += "\u2195"
		case 0x13:
			result += "\u203C"
		case 0x14:
			result += "\xc2\xb6"
		case 0x15:
			result += "\xc2\xa7"
		case 0x16:
			result += "\u25AC"
		case 0x17:
			result += "\u21A8"
		case 0x18:
			result += "\u2191"
		case 0x19:
			result += "\u2193"
		case 0x1a:
			result += "\u2192"
		case 0x1c:
			result += "\u221F"
		case 0x1d:
			result += "\u2194"
		case 0x1e:
			result += "\u25B2"
		case 0x1f:
			result += "\u25BC"
		case 0x7f:
			result += "\u2302"
		case 0x80:
			result += "\xc3\x87"
		case 0x81:
			result += "\xc3\xbc"
		case 0x82:
			result += "\xc3\xa9"
		case 0x83:
			result += "\xc3\xa2"
		case 0x84:
			result += "\xc3\xa4"
		case 0x85:
			result += "\xc3\xa0"
		case 0x86:
			result += "\xc3\xa5"
		case 0x87:
			result += "\xc3\xa7"
		case 0x88:
			result += "\xc3\xaa"
		case 0x89:
			result += "\xc3\xab"
		case 0x8a:
			result += "\xc3\xa8"
		case 0x8b:
			result += "\xc3\xaf"
		case 0x8c:
			result += "\xc3\xae"
		case 0x8d:
			result += "\xc3\xac"
		case 0x8e:
			result += "\xc3\x84"
		case 0x8f:
			result += "\xc3\x85"
		case 0x90:
			result += "\xc3\x89"
		case 0x91:
			result += "\xc3\xa6"
		case 0x92:
			result += "\xc3\x86"
		case 0x93:
			result += "\xc3\xb4"
		case 0x94:
			result += "\xc3\xb6"
		case 0x95:
			result += "\xc3\xb2"
		case 0x96:
			result += "\xc3\xbb"
		case 0x97:
			result += "\xc3\xb9"
		case 0x98:
			result += "\xc3\xbf"
		case 0x99:
			result += "\xc3\x96"
		case 0x9a:
			result += "\xc3\x9c"
		case 0x9b:
			result += "\xc2\xa2"
		case 0x9c:
			result += "\xc2\xa3"
		case 0x9d:
			result += "\xc2\xa5"
		case 0x9e:
			result += "\u20A7"
		case 0x9f:
			result += "\u0192"
		case 0xa0:
			result += "\xc3\xa1"
		case 0xa1:
			result += "\xc3\xad"
		case 0xa2:
			result += "\xc3\xb3"
		case 0xa3:
			result += "\xc3\xba"
		case 0xa4:
			result += "\xc3\xb1"
		case 0xa5:
			result += "\xc3\x91"
		case 0xa6:
			result += "\xc2\xaa"
		case 0xa7:
			result += "\xc2\xba"
		case 0xa8:
			result += "\xc2\xbf"
		case 0xa9:
			result += "\u2310"
		case 0xaa:
			result += "\xc2\xac"
		case 0xab:
			result += "\xc2\xbd"
		case 0xac:
			result += "\xc2\xbc"
		case 0xad:
			result += "\xc2\xa1"
		case 0xae:
			result += "\xc2\xab"
		case 0xaf:
			result += "\xc2\xbb"
		case 0xb0:
			result += "\u2591"
		case 0xb1:
			result += "\u2592"
		case 0xb2:
			result += "\u2593"
		case 0xb3:
			result += "\u2502"
		case 0xb4:
			result += "\u2524"
		case 0xb5:
			result += "\u2561"
		case 0xb6:
			result += "\u2562"
		case 0xb7:
			result += "\u2556"
		case 0xb8:
			result += "\u2555"
		case 0xb9:
			result += "\u2563"
		case 0xba:
			result += "\u2551"
		case 0xbb:
			result += "\u2557"
		case 0xbc:
			result += "\u255D"
		case 0xbd:
			result += "\u255C"
		case 0xbe:
			result += "\u255B"
		case 0xbf:
			result += "\u2510"
		case 0xc0:
			result += "\u2514"
		case 0xc1:
			result += "\u2534"
		case 0xc2:
			result += "\u252C"
		case 0xc3:
			result += "\u251C"
		case 0xc4:
			result += "\u2500"
		case 0xc5:
			result += "\u253C"
		case 0xc6:
			result += "\u255E"
		case 0xc7:
			result += "\u255F"
		case 0xc8:
			result += "\u255A"
		case 0xc9:
			result += "\u2554"
		case 0xca:
			result += "\u2569"
		case 0xcb:
			result += "\u2566"
		case 0xcc:
			result += "\u2560"
		case 0xcd:
			result += "\u2550"
		case 0xce:
			result += "\u256C"
		case 0xcf:
			result += "\u2567"
		case 0xd0:
			result += "\u2568"
		case 0xd1:
			result += "\u2564"
		case 0xd2:
			result += "\u2565"
		case 0xd3:
			result += "\u2559"
		case 0xd4:
			result += "\u2558"
		case 0xd5:
			result += "\u2552"
		case 0xd6:
			result += "\u2553"
		case 0xd7:
			result += "\u256B"
		case 0xd8:
			result += "\u256A"
		case 0xd9:
			result += "\u2518"
		case 0xda:
			result += "\u250C"
		case 0xdb:
			result += "\u2588"
		case 0xdc:
			result += "\u2584"
		case 0xdd:
			result += "\u258C"
		case 0xde:
			result += "\u2590"
		case 0xdf:
			result += "\u2580"
		case 0xe0:
			result += "\u03B1"
		case 0xe1:
			result += "\xc3\x9f"
		case 0xe2:
			result += "\u0393"
		case 0xe3:
			result += "\u03C0"
		case 0xe4:
			result += "\u03A3"
		case 0xe5:
			result += "\u03C3"
		case 0xe6:
			result += "\xc2\xb5"
		case 0xe7:
			result += "\u03C4"
		case 0xe8:
			result += "\u03A6"
		case 0xe9:
			result += "\u0398"
		case 0xea:
			result += "\u03A9"
		case 0xeb:
			result += "\u03B4"
		case 0xec:
			result += "\u221E"
		case 0xed:
			result += "\u03C6"
		case 0xee:
			result += "\u03B5"
		case 0xef:
			result += "\u2229"
		case 0xf0:
			result += "\u2261"
		case 0xf1:
			result += "\xc2\xb1"
		case 0xf2:
			result += "\u2265"
		case 0xf3:
			result += "\u2264"
		case 0xf4:
			result += "\u2320"
		case 0xf5:
			result += "\u2321"
		case 0xf6:
			result += "\xc3\xb7"
		case 0xf7:
			result += "\u2248"
		case 0xf8:
			result += "\xc2\xb0"
		case 0xf9:
			result += "\u2219"
		case 0xfa:
			result += "\xc2\xb7"
		case 0xfb:
			result += "\u221A"
		case 0xfc:
			result += "\u207F"
		case 0xfd:
			result += "\xc2\xb2"
		case 0xfe:
			result += "\u25A0"
		case 0xff:
			result += "\xc2\xa0"
		default:
			result += string(char)
		}
	}
	return result
}