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added output grouping to hexdump

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This commit is contained in:
j83305 2020-06-02 14:11:30 +01:00
parent 616b38c6fb
commit 87dfdebb95
1 changed files with 15 additions and 2 deletions
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17
src/core/operations/ToHexdump.mjs
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@ -5,6 +5,7 @@
*/
import Operation from "../Operation.mjs";
import OperationError from "../errors/OperationError.mjs";
import Utils from "../Utils.mjs";
/**
@ -39,6 +40,11 @@ class ToHexdump extends Operation {
"name": "Include final length",
"type": "boolean",
"value": false
},
{
"name": "Output grouping",
"type": "number",
"value": 1
}
];
}
@ -52,13 +58,20 @@ class ToHexdump extends Operation {
const data = new Uint8Array(input);
const [length, upperCase, includeFinalLength] = args;
const padding = 2;
const groupSize = args[3] || 1;
if (length%groupSize !== 0) {
throw new OperationError("The value of the width parameter must be divisible by the value of the output grouping parameter");
}
let output = "";
for (let i = 0; i < data.length; i += length) {
const buff = data.slice(i, i+length);
let hexa = "";
for (let j = 0; j < buff.length; j++) {
hexa += Utils.hex(buff[j], padding) + " ";
hexa += Utils.hex(buff[j], padding);
if (groupSize === 1 || (j > 0 && (j+1)%groupSize === 0)) {
hexa += " ";
}
}
let lineNo = Utils.hex(i, 8);
@ -69,7 +82,7 @@ class ToHexdump extends Operation {
}
output += lineNo + " " +
hexa.padEnd(length*(padding+1), " ") +
hexa.padEnd(length*padding+(length/groupSize), " ") +
" |" + Utils.printable(Utils.byteArrayToChars(buff)).padEnd(buff.length, " ") + "|\n";
if (includeFinalLength && i+buff.length === data.length) {