44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
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function hexStringToArrayBuffer(hexString) {
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//https://gist.github.com/don/871170d88cf6b9007f7663fdbc23fe09#file-hexstringtoarraybuffer-js
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// remove the leading 0x
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hexString = hexString.replace(/^0x/, '');
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// ensure even number of characters
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if (hexString.length % 2 != 0) {
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console.log('WARNING: expecting an even number of characters in the hexString');
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}
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// check for some non-hex characters
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var bad = hexString.match(/[G-Z\s]/i);
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if (bad) {
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console.log('WARNING: found non-hex characters', bad);
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}
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// split the string into pairs of octets
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var pairs = hexString.match(/[\dA-F]{2}/gi);
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// convert the octets to integers
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var integers = pairs.map(function (s) {
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return parseInt(s, 16);
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});
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var array = new Uint8Array(integers);
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return array.buffer;
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}
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function buf2hex(buffer) {
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// https://stackoverflow.com/questions/34309988/byte-array-to-hex-string-conversion-in-javascript
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var u = new Uint8Array(buffer),
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a = new Array(u.length),
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i = u.length;
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while (i--) // map to hex
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a[i] = (u[i] < 16 ? '0' : '') + u[i].toString(16);
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u = null; // free memory
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return a.join('');
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};
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function typedArrayToBuffer(array) {
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// https://stackoverflow.com/questions/37228285/uint8array-to-arraybuffer
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return array.buffer.slice(array.byteOffset, array.byteLength + array.byteOffset)
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}
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