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Merge branch 'fix-reverse-character' of https://github.com/mikecat/CyberChef

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n1474335 2022-11-25 12:02:46 +00:00
commit 2d99c365dd
1 changed files with 21 additions and 1 deletions
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22
src/core/operations/Reverse.mjs
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@ -5,6 +5,7 @@
*/
import Operation from "../Operation.mjs";
import Utils from "../Utils.mjs";
/**
* Reverse operation
@ -26,7 +27,8 @@ class Reverse extends Operation {
{
"name": "By",
"type": "option",
"value": ["Character", "Line"]
"value": ["Byte", "Character", "Line"],
"defaultIndex": 1
}
];
}
@ -57,6 +59,24 @@ class Reverse extends Operation {
result.push(0x0a);
}
return result.slice(0, input.length);
} else if (args[0] === "Character") {
const inputString = Utils.byteArrayToUtf8(input);
let result = "";
for (let i = inputString.length - 1; i >= 0; i--) {
const c = inputString.charCodeAt(i);
if (i > 0 && 0xdc00 <= c && c <= 0xdfff) {
const c2 = inputString.charCodeAt(i - 1);
if (0xd800 <= c2 && c2 <= 0xdbff) {
// surrogates
result += inputString.charAt(i - 1);
result += inputString.charAt(i);
i--;
continue;
}
}
result += inputString.charAt(i);
}
return Utils.strToUtf8ByteArray(result);
} else {
return input.reverse();
}