b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
90 lines
2.2 KiB
JavaScript
90 lines
2.2 KiB
JavaScript
'use strict';
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/* exported SEUtils */
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(function(exports) {
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var SEUtils = {
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byteToHexString: function byteToHexString(uint8arr) {
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if (!uint8arr) {
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return '';
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}
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var hexStr = '';
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for (var i = 0; i < uint8arr.length; i++) {
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var hex = (uint8arr[i] & 0xff).toString(16);
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hex = (hex.length === 1) ? '0' + hex : hex;
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hexStr += hex;
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}
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return hexStr.toUpperCase();
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},
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hexStringToByte: function hexStringToByte(str) {
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var a = [];
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for(var i = 0, len = str.length; i < len; i+=2) {
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a.push(parseInt(str.substr(i,2),16));
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}
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return new Uint8Array(a);
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},
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byteToASCIIString: function byteToASCIIString(arr) {
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var str = '';
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var len = arr && arr.length ? arr.length : 0;
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for(var i = 0; i < len; i++) {
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str += arr[i] < 0x20 || arr > 0x7E ? '' : String.fromCharCode(arr[i]);
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}
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return str;
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},
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joinUint8Arrays: function joinUint8Arrays() {
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var args = Array.prototype.slice.call(arguments);
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var length = args.reduce(function(a, b) { return a + b.length; }, 0);
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var out = new Uint8Array(length);
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args.reduce(function(previousLen, buffer) {
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out.set(buffer, previousLen);
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return previousLen + buffer.length;
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}, 0);
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return out;
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},
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// no support for multibyte tag and constructed data object
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parseSimpleTLV: function parseSimpleTLV(data) {
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if(!data) {
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return null;
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}
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var result = {};
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for(var i = 0, len = data.length; i < len;) {
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var tag = data[i];
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var length = data[i+1];
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var value = data.slice(i+2, i+2 + length);
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result[tag] = value;
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i += 2 + length;
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}
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return result;
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},
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promises: {
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whilePromise: function(condition, action, init) {
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return new Promise((resolve, reject) => {
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var loop = (value) => {
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if (condition(value)) {
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return resolve(value);
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}
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return action(value).then(loop).catch(reject);
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};
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loop(init);
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});
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},
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},
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};
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exports.SEUtils = SEUtils;
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}((typeof exports === 'undefined') ? window : exports));
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