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function dec2char(n) {
// converts a decimal number to a Unicode character
// n: the dec codepoint value to be converted
if (n <= 0xffff) {
out = String.fromCharCode(n);
} else if (n <= 0x10ffff) {
n -= 0x10000;
out =
String.fromCharCode(0xd800 | (n >> 10)) +
String.fromCharCode(0xdc00 | (n & 0x3ff));
} else out = "dec2char error: Code point out of range: " + n;
return out;
}
function sjisDecoder(stream) {
stream = stream.replace(/%/g, " ");
stream = stream.replace(/[\s]+/g, " ").trim();
var bytes = stream.split(" ");
for (var i = 0; i < bytes.length; i++) bytes[i] = parseInt(bytes[i], 16);
var out = "";
var lead, byte, leadoffset, offset, ptr, cp;
var sjisLead = 0x00;
var endofstream = 2000000;
var finished = false;
while (!finished) {
if (bytes.length == 0) byte = endofstream;
else byte = bytes.shift();
if (byte == endofstream && sjisLead != 0x00) {
sjisLead = 0x00;
out += "�";
continue;
}
if (byte == endofstream && sjisLead == 0x00) {
finished = true;
continue;
}
if (sjisLead != 0x00) {
lead = sjisLead;
ptr = null;
sjisLead = 0x00;
if (byte < 0x7f) offset = 0x40;
else offset = 0x41;
if (lead < 0xa0) leadoffset = 0x81;
else leadoffset = 0xc1;
if ((byte >= 0x40 && byte <= 0x7e) || (byte >= 0x80 && byte <= 0xfc))
ptr = (lead - leadoffset) * 188 + byte - offset;
if (ptr != null && ptr >= 8836 && ptr <= 10715) {
out += dec2char(0xe000 + ptr - 8836);
continue;
}
if (ptr == null) cp = null;
else cp = jis0208[ptr];
if (cp == null && byte >= 0x00 && byte <= 0x7f) {
bytes.unshift(byte);
}
if (cp == null) {
out += "�";
continue;
}
out += dec2char(cp);
continue;
}
if ((byte >= 0x00 && byte <= 0x7f) || byte == 0x80) {
out += dec2char(byte);
continue;
}
if (byte >= 0xa1 && byte <= 0xdf) {
out += dec2char(0xff61 + byte - 0xa1);
continue;
}
if ((byte >= 0x81 && byte <= 0x9f) || (byte >= 0xe0 && byte <= 0xfc)) {
sjisLead = byte;
continue;
}
out += "�";
}
return out;
}
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