package mssql type charsetMap struct { sb [256]rune // single byte runes, -1 for a double byte character lead byte db map[int]rune // double byte runes } func collation2charset(col collation) *charsetMap { // http://msdn.microsoft.com/en-us/library/ms144250.aspx // http://msdn.microsoft.com/en-us/library/ms144250(v=sql.105).aspx switch col.sortId { case 30, 31, 32, 33, 34: return cp437 case 40, 41, 42, 44, 49, 55, 56, 57, 58, 59, 60, 61: return cp850 case 50, 51, 52, 53, 54, 71, 72, 73, 74, 75: return cp1252 case 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96: return cp1250 case 104, 105, 106, 107, 108: return cp1251 case 112, 113, 114, 121, 124: return cp1253 case 128, 129, 130: return cp1254 case 136, 137, 138: return cp1255 case 144, 145, 146: return cp1256 case 152, 153, 154, 155, 156, 157, 158, 159, 160: return cp1257 case 183, 184, 185, 186: return cp1252 case 192, 193: return cp932 case 194, 195: return cp949 case 196, 197: return cp950 case 198, 199: return cp936 case 200: return cp932 case 201: return cp949 case 202: return cp950 case 203: return cp936 case 204, 205, 206: return cp874 case 210, 211, 212, 213, 214, 215, 216, 217: return cp1252 } // http://technet.microsoft.com/en-us/library/aa176553(v=sql.80).aspx switch col.getLcid() { case 0x001e, 0x041e: return cp874 case 0x0411, 0x10411: return cp932 case 0x0804, 0x1004, 0x20804: return cp936 case 0x0012, 0x0412: return cp949 case 0x0404, 0x1404, 0x0c04, 0x7c04, 0x30404: return cp950 case 0x041c, 0x041a, 0x0405, 0x040e, 0x104e, 0x0415, 0x0418, 0x041b, 0x0424, 0x1040e: return cp1250 case 0x0423, 0x0402, 0x042f, 0x0419, 0x081a, 0x0c1a, 0x0422, 0x043f, 0x0444, 0x082c: return cp1251 case 0x0408: return cp1253 case 0x041f, 0x042c, 0x0443: return cp1254 case 0x040d: return cp1255 case 0x0401, 0x0801, 0xc01, 0x1001, 0x1401, 0x1801, 0x1c01, 0x2001, 0x2401, 0x2801, 0x2c01, 0x3001, 0x3401, 0x3801, 0x3c01, 0x4001, 0x0429, 0x0420: return cp1256 case 0x0425, 0x0426, 0x0427, 0x0827: return cp1257 case 0x042a: return cp1258 case 0x0439, 0x045a, 0x0465: return nil } return cp1252 } func charset2utf8(col collation, s []byte) string { cm := collation2charset(col) if cm == nil { return string(s) } buf := make([]rune, 0, len(s)) for i := 0; i < len(s); i++ { ch := cm.sb[s[i]] if ch == -1 { if i+1 == len(s) { ch = 0xfffd } else { n := int(s[i+1]) + (int(s[i]) << 8) i++ var ok bool ch, ok = cm.db[n] if !ok { ch = 0xfffd } } } buf = append(buf, ch) } return string(buf) }