gitea/modules/mahonia/tcvn3.go

229 lines
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2014-09-07 23:58:01 +00:00
package mahonia
// Converters for TCVN3 encoding.
import (
"sync"
)
var (
onceTCVN3 sync.Once
dataTCVN3 = struct {
UnicodeToWord map[rune][2]byte
WordToUnicode [256]struct {
r rune
m *[256]rune
}
}{}
)
func init() {
p := new(Charset)
p.Name = "TCVN3"
p.NewDecoder = func() Decoder {
onceTCVN3.Do(buildTCVN3Tables)
return decodeTCVN3
}
p.NewEncoder = func() Encoder {
onceTCVN3.Do(buildTCVN3Tables)
return encodeTCVN3
}
RegisterCharset(p)
}
func decodeTCVN3(p []byte) (rune, int, Status) {
if len(p) == 0 {
return 0, 0, NO_ROOM
}
item := &dataTCVN3.WordToUnicode[p[0]]
if item.m != nil && len(p) > 1 {
if r := item.m[p[1]]; r != 0 {
return r, 2, SUCCESS
}
}
if item.r != 0 {
return item.r, 1, SUCCESS
}
if p[0] < 0x80 {
return rune(p[0]), 1, SUCCESS
}
return '?', 1, INVALID_CHAR
}
func encodeTCVN3(p []byte, c rune) (int, Status) {
if len(p) == 0 {
return 0, NO_ROOM
}
if c < rune(0x80) {
p[0] = byte(c)
return 1, SUCCESS
}
if v, ok := dataTCVN3.UnicodeToWord[c]; ok {
if v[1] != 0 {
if len(p) < 2 {
return 0, NO_ROOM
}
p[0] = v[0]
p[1] = v[1]
return 2, SUCCESS
} else {
p[0] = v[0]
return 1, SUCCESS
}
}
p[0] = '?'
return 1, INVALID_CHAR
}
func buildTCVN3Tables() {
dataTCVN3.UnicodeToWord = map[rune][2]byte{
// one byte
0x00C2: {0xA2, 0x00},
0x00CA: {0xA3, 0x00},
0x00D4: {0xA4, 0x00},
0x00E0: {0xB5, 0x00},
0x00E1: {0xB8, 0x00},
0x00E2: {0xA9, 0x00},
0x00E3: {0xB7, 0x00},
0x00E8: {0xCC, 0x00},
0x00E9: {0xD0, 0x00},
0x00EA: {0xAA, 0x00},
0x00EC: {0xD7, 0x00},
0x00ED: {0xDD, 0x00},
0x00F2: {0xDF, 0x00},
0x00F3: {0xE3, 0x00},
0x00F4: {0xAB, 0x00},
0x00F5: {0xE2, 0x00},
0x00F9: {0xEF, 0x00},
0x00FA: {0xF3, 0x00},
0x00FD: {0xFD, 0x00},
0x0102: {0xA1, 0x00},
0x0103: {0xA8, 0x00},
0x0110: {0xA7, 0x00},
0x0111: {0xAE, 0x00},
0x0129: {0xDC, 0x00},
0x0169: {0xF2, 0x00},
0x01A0: {0xA5, 0x00},
0x01A1: {0xAC, 0x00},
0x01AF: {0xA6, 0x00},
0x01B0: {0xAD, 0x00},
0x1EA1: {0xB9, 0x00},
0x1EA3: {0xB6, 0x00},
0x1EA5: {0xCA, 0x00},
0x1EA7: {0xC7, 0x00},
0x1EA9: {0xC8, 0x00},
0x1EAB: {0xC9, 0x00},
0x1EAD: {0xCB, 0x00},
0x1EAF: {0xBE, 0x00},
0x1EB1: {0xBB, 0x00},
0x1EB3: {0xBC, 0x00},
0x1EB5: {0xBD, 0x00},
0x1EB7: {0xC6, 0x00},
0x1EB9: {0xD1, 0x00},
0x1EBB: {0xCE, 0x00},
0x1EBD: {0xCF, 0x00},
0x1EBF: {0xD5, 0x00},
0x1EC1: {0xD2, 0x00},
0x1EC3: {0xD3, 0x00},
0x1EC5: {0xD4, 0x00},
0x1EC7: {0xD6, 0x00},
0x1EC9: {0xD8, 0x00},
0x1ECB: {0xDE, 0x00},
0x1ECD: {0xE4, 0x00},
0x1ECF: {0xE1, 0x00},
0x1ED1: {0xE8, 0x00},
0x1ED3: {0xE5, 0x00},
0x1ED5: {0xE6, 0x00},
0x1ED7: {0xE7, 0x00},
0x1ED9: {0xE9, 0x00},
0x1EDB: {0xED, 0x00},
0x1EDD: {0xEA, 0x00},
0x1EDF: {0xEB, 0x00},
0x1EE1: {0xEC, 0x00},
0x1EE3: {0xEE, 0x00},
0x1EE5: {0xF4, 0x00},
0x1EE7: {0xF1, 0x00},
0x1EE9: {0xF8, 0x00},
0x1EEB: {0xF5, 0x00},
0x1EED: {0xF6, 0x00},
0x1EEF: {0xF7, 0x00},
0x1EF1: {0xF9, 0x00},
0x1EF3: {0xFA, 0x00},
0x1EF5: {0xFE, 0x00},
0x1EF7: {0xFB, 0x00},
0x1EF9: {0xFC, 0x00},
// two bytes
0x00C0: {0x41, 0xB5},
0x00C1: {0x41, 0xB8},
0x00C3: {0x41, 0xB7},
0x00C8: {0x45, 0xCC},
0x00C9: {0x45, 0xD0},
0x00CC: {0x49, 0xD7},
0x00CD: {0x49, 0xDD},
0x00D2: {0x4F, 0xDF},
0x00D3: {0x4F, 0xE3},
0x00D5: {0x4F, 0xE2},
0x00D9: {0x55, 0xEF},
0x00DA: {0x55, 0xF3},
0x00DD: {0x59, 0xFD},
0x0128: {0x49, 0xDC},
0x0168: {0x55, 0xF2},
0x1EA0: {0x41, 0xB9},
0x1EA2: {0x41, 0xB6},
0x1EA4: {0xA2, 0xCA},
0x1EA6: {0xA2, 0xC7},
0x1EA8: {0xA2, 0xC8},
0x1EAA: {0xA2, 0xC9},
0x1EAC: {0xA2, 0xCB},
0x1EAE: {0xA1, 0xBE},
0x1EB0: {0xA1, 0xBB},
0x1EB2: {0xA1, 0xBC},
0x1EB4: {0xA1, 0xBD},
0x1EB6: {0xA1, 0xC6},
0x1EB8: {0x45, 0xD1},
0x1EBA: {0x45, 0xCE},
0x1EBC: {0x45, 0xCF},
0x1EBE: {0xA3, 0xD5},
0x1EC0: {0xA3, 0xD2},
0x1EC2: {0xA3, 0xD3},
0x1EC4: {0xA3, 0xD4},
0x1EC6: {0xA3, 0xD6},
0x1EC8: {0x49, 0xD8},
0x1ECA: {0x49, 0xDE},
0x1ECC: {0x4F, 0xE4},
0x1ECE: {0x4F, 0xE1},
0x1ED0: {0xA4, 0xE8},
0x1ED2: {0xA4, 0xE5},
0x1ED4: {0xA4, 0xE6},
0x1ED6: {0xA4, 0xE7},
0x1ED8: {0xA4, 0xE9},
0x1EDA: {0xA5, 0xED},
0x1EDC: {0xA5, 0xEA},
0x1EDE: {0xA5, 0xEB},
0x1EE0: {0xA5, 0xEC},
0x1EE2: {0xA5, 0xEE},
0x1EE4: {0x55, 0xF4},
0x1EE6: {0x55, 0xF1},
0x1EE8: {0xA6, 0xF8},
0x1EEA: {0xA6, 0xF5},
0x1EEC: {0xA6, 0xF6},
0x1EEE: {0xA6, 0xF7},
0x1EF0: {0xA6, 0xF9},
0x1EF2: {0x59, 0xFA},
0x1EF4: {0x59, 0xFE},
0x1EF6: {0x59, 0xFB},
0x1EF8: {0x59, 0xFC},
}
for r, b := range dataTCVN3.UnicodeToWord {
item := &dataTCVN3.WordToUnicode[b[0]]
if b[1] == 0 {
item.r = r
} else {
if item.m == nil {
item.m = new([256]rune)
}
item.m[b[1]] = r
}
}
}