obj2gltf/lib/getJsonBufferPadded.js

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'use strict';
module.exports = getJsonBufferPadded;
/**
* Convert the JSON object to a padded buffer.
*
* Pad the JSON with extra whitespace to fit the next 4-byte boundary. This ensures proper alignment
* for the section that follows.
*
* @param {Object} [json] The JSON object.
* @returns {Buffer} The padded JSON buffer.
*
* @private
*/
function getJsonBufferPadded(json) {
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let string = JSON.stringify(json);
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const boundary = 4;
const byteLength = Buffer.byteLength(string);
const remainder = byteLength % boundary;
const padding = (remainder === 0) ? 0 : boundary - remainder;
let whitespace = '';
for (let i = 0; i < padding; ++i) {
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whitespace += ' ';
}
string += whitespace;
return Buffer.from(string);
}