tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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sjis-decoder.js (2067B)

      1 function dec2char(n) {
      2 // converts a decimal number to a Unicode character
      3 // n: the dec codepoint value to be converted
      4 if (n <= 0xffff) {
      5 	out = String.fromCharCode(n);
      6 } else if (n <= 0x10ffff) {
      7 	n -= 0x10000;
      8 	out =
      9 		String.fromCharCode(0xd800 | (n >> 10)) +
     10 		String.fromCharCode(0xdc00 | (n & 0x3ff));
     11 } else out = "dec2char error: Code point out of range: " + n;
     12 return out;
     13 }
     14 
     15 function sjisDecoder(stream) {
     16 stream = stream.replace(/%/g, " ");
     17 stream = stream.replace(/[\s]+/g, " ").trim();
     18 var bytes = stream.split(" ");
     19 for (var i = 0; i < bytes.length; i++) bytes[i] = parseInt(bytes[i], 16);
     20 var out = "";
     21 var lead, byte, leadoffset, offset, ptr, cp;
     22 var sjisLead = 0x00;
     23 var endofstream = 2000000;
     24 var finished = false;
     25 
     26 while (!finished) {
     27 	if (bytes.length == 0) byte = endofstream;
     28 	else byte = bytes.shift();
     29 
     30 	if (byte == endofstream && sjisLead != 0x00) {
     31 		sjisLead = 0x00;
     32 		out += "�";
     33 		continue;
     34 	}
     35 	if (byte == endofstream && sjisLead == 0x00) {
     36 		finished = true;
     37 		continue;
     38 	}
     39 	if (sjisLead != 0x00) {
     40 		lead = sjisLead;
     41 		ptr = null;
     42 		sjisLead = 0x00;
     43 		if (byte < 0x7f) offset = 0x40;
     44 		else offset = 0x41;
     45 		if (lead < 0xa0) leadoffset = 0x81;
     46 		else leadoffset = 0xc1;
     47 		if ((byte >= 0x40 && byte <= 0x7e) || (byte >= 0x80 && byte <= 0xfc))
     48 			ptr = (lead - leadoffset) * 188 + byte - offset;
     49 		if (ptr != null && ptr >= 8836 && ptr <= 10715) {
     50 			out += dec2char(0xe000 + ptr - 8836);
     51 			continue;
     52 		}
     53 		if (ptr == null) cp = null;
     54 		else cp = jis0208[ptr];
     55 		if (cp == null && byte >= 0x00 && byte <= 0x7f) {
     56 			bytes.unshift(byte);
     57 		}
     58 		if (cp == null) {
     59 			out += "�";
     60 			continue;
     61 		}
     62 		out += dec2char(cp);
     63 		continue;
     64 	}
     65 	if ((byte >= 0x00 && byte <= 0x7f) || byte == 0x80) {
     66 		out += dec2char(byte);
     67 		continue;
     68 	}
     69 	if (byte >= 0xa1 && byte <= 0xdf) {
     70 		out += dec2char(0xff61 + byte - 0xa1);
     71 		continue;
     72 	}
     73 	if ((byte >= 0x81 && byte <= 0x9f) || (byte >= 0xe0 && byte <= 0xfc)) {
     74 		sjisLead = byte;
     75 		continue;
     76 	}
     77 	out += "�";
     78 }
     79 return out;
     80 }