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refactor(zip) decode

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coderaiser 2014-05-28 10:49:53 -04:00
parent be193bad85
commit bce8b9e206
1 changed files with 37 additions and 35 deletions
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72
lib/client/zip.js
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@ -56,42 +56,44 @@ var Util, Zip, pako;
*/
function decode(s) {
/*jshint bitwise:false */
s = s.replace(/%([EF][0-9A-F])%([89AB][0-9A-F])%([89AB][0-9A-F])/gi,
function(code,hex1,hex2,hex3) {
var n, n3,
n1 = parseInt(hex1,16) - 0xE0,
n2 = parseInt(hex2,16) - 0x80;
if (n1 === 0 && n2 < 32)
return code;
n3 = parseInt(hex3,16)-0x80;
n = (n1<<12) + (n2<<6) + n3;
if (n > 0xFFFF)
return code;
return String.fromCharCode(n);
});
s = s.replace(/%([CD][0-9A-F])%([89AB][0-9A-F])/gi,
function(code,hex1,hex2) {
var n1, n2;
n1 = parseInt(hex1,16) - 0xC0;
if (n1 < 2)
return code;
n2 = parseInt(hex2,16) - 0x80;
return String.fromCharCode((n1<<6) + n2);
});
s = s.replace(/%([0-7][0-9A-F])/gi,
function(code, hex) {
return String.fromCharCode(parseInt(hex,16));
});
s = s.replace(/%([EF][0-9A-F])%([89AB][0-9A-F])%([89AB][0-9A-F])/gi, ef)
.replace(/%([CD][0-9A-F])%([89AB][0-9A-F])/gi, cd)
.replace(/%([0-7][0-9A-F])/gi, o7);
return s;
function o7(code, hex) {
return String.fromCharCode(parseInt(hex,16));
}
function ef(code, hex1, hex2, hex3) {
var n, n3,
n1 = parseInt(hex1,16) - 0xE0,
n2 = parseInt(hex2,16) - 0x80;
if (n1 === 0 && n2 < 32)
return code;
n3 = parseInt(hex3,16)-0x80;
n = (n1<<12) + (n2<<6) + n3;
if (n > 0xFFFF)
return code;
return String.fromCharCode(n);
}
function cd(code, hex1, hex2) {
var n1, n2;
n1 = parseInt(hex1,16) - 0xC0;
if (n1 < 2)
return code;
n2 = parseInt(hex2,16) - 0x80;
return String.fromCharCode((n1<<6) + n2);
}
}
})();