tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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big5-encoder.js (2865B)

      1 var big5CPs = []; // index is unicode cp, value is pointer
      2 for (var p = 5024; p < big5.length; p++) {
      3 // "Let index be index jis0208 excluding all pointers in the range 8272 to 8835, inclusive."
      4 if (big5[p] != null && big5CPs[big5[p]] == null) {
      5 	big5CPs[big5[p]] = p;
      6 }
      7 }
      8 //  If code point is U+2550, U+255E, U+2561, U+256A, U+5341, or U+5345, return the last pointer corresponding to code point in index.
      9 big5CPs[0x2550] = 18991;
     10 big5CPs[0x255e] = 18975;
     11 big5CPs[0x2561] = 18977;
     12 big5CPs[0x256a] = 18976;
     13 big5CPs[0x5341] = 5512;
     14 big5CPs[0x5345] = 5599;
     15 
     16 function chars2cps(chars) {
     17 // this is needed because of javascript's handling of supplementary characters
     18 // char: a string of unicode characters
     19 // returns an array of decimal code point values
     20 var haut = 0;
     21 var out = [];
     22 for (var i = 0; i < chars.length; i++) {
     23 	var b = chars.charCodeAt(i);
     24 	if (b < 0 || b > 0xffff) {
     25 		alert("Error in chars2cps: byte out of range " + b.toString(16) + "!");
     26 	}
     27 	if (haut != 0) {
     28 		if (0xdc00 <= b && b <= 0xdfff) {
     29 			out.push(0x10000 + ((haut - 0xd800) << 10) + (b - 0xdc00));
     30 			haut = 0;
     31 			continue;
     32 		} else {
     33 			alert(
     34 				"Error in chars2cps: surrogate out of range " +
     35 					haut.toString(16) +
     36 					"!"
     37 			);
     38 			haut = 0;
     39 		}
     40 	}
     41 	if (0xd800 <= b && b <= 0xdbff) {
     42 		haut = b;
     43 	} else {
     44 		out.push(b);
     45 	}
     46 }
     47 return out;
     48 }
     49 
     50 function big5Encoder(stream) {
     51 var cps = chars2cps(stream);
     52 var out = "";
     53 var cp;
     54 var finished = false;
     55 var endofstream = 2000000;
     56 
     57 while (!finished) {
     58 	if (cps.length == 0) cp = endofstream;
     59 	else cp = cps.shift();
     60 
     61 	var cpx = 0;
     62 
     63 	if (cp == endofstream) {
     64 		finished = true;
     65 		continue;
     66 	}
     67 	if (cp >= 0x00 && cp <= 0x7f) {
     68 		// ASCII
     69 		out += " " + cp.toString(16).toUpperCase();
     70 		continue;
     71 	}
     72 	var ptr = big5CPs[cp];
     73 	if (ptr == null) {
     74 		return null;
     75 		//			out += ' &#'+cp+';'
     76 		//			continue
     77 	}
     78 	var lead = Math.floor(ptr / 157) + 0x81;
     79 	var trail = ptr % 157;
     80 	var offset;
     81 	if (trail < 0x3f) offset = 0x40;
     82 	else {
     83 		offset = 0x62;
     84 	}
     85 	var end = trail + offset;
     86 	out +=
     87 		" " +
     88 		lead.toString(16).toUpperCase() +
     89 		" " +
     90 		end.toString(16).toUpperCase();
     91 }
     92 
     93 return out.trim();
     94 }
     95 
     96 function convertToHex(str) {
     97 // converts a string of ASCII characters to hex byte codes
     98 var out = "";
     99 var result;
    100 for (var c = 0; c < str.length; c++) {
    101 	result = str.charCodeAt(c).toString(16).toUpperCase() + " ";
    102 	out += result;
    103 }
    104 return out;
    105 }
    106 
    107 function normalizeStr(str) {
    108 var out = "";
    109 for (var c = 0; c < str.length; c++) {
    110 	if (str.charAt(c) == "%") {
    111 		out += String.fromCodePoint(
    112 			parseInt(str.charAt(c + 1) + str.charAt(c + 2), 16)
    113 		);
    114 		c += 2;
    115 	} else out += str.charAt(c);
    116 }
    117 var result = "";
    118 for (var o = 0; o < out.length; o++) {
    119 	result += "%" + out.charCodeAt(o).toString(16).toUpperCase();
    120 }
    121 return result.replace(/%1B%28%42$/, "");
    122 }