95 lines
2.1 KiB
Plaintext
95 lines
2.1 KiB
Plaintext
'use strict';
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var Transform = require('stream').Transform;
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var streamParser = require('stream-parser');
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function ParserStream() {
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Transform.call(this, { readableObjectMode: true });
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}
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// Inherit from Transform
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ParserStream.prototype = Object.create(Transform.prototype);
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ParserStream.prototype.constructor = ParserStream;
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streamParser(ParserStream.prototype);
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exports.ParserStream = ParserStream;
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exports.sliceEq = function (src, start, dest) {
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for (var i = start, j = 0; j < dest.length;) {
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if (src[i++] !== dest[j++]) return false;
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}
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return true;
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};
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exports.str2arr = function (str, format) {
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var arr = [], i = 0;
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if (format && format === 'hex') {
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while (i < str.length) {
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arr.push(parseInt(str.slice(i, i + 2), 16));
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i += 2;
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}
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} else {
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for (; i < str.length; i++) {
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/* eslint-disable no-bitwise */
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arr.push(str.charCodeAt(i) & 0xFF);
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}
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}
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return arr;
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};
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exports.readUInt16LE = function (data, offset) {
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return data[offset] | (data[offset + 1] << 8);
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};
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exports.readUInt16BE = function (data, offset) {
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return data[offset + 1] | (data[offset] << 8);
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};
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exports.readUInt32LE = function (data, offset) {
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return data[offset] |
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(data[offset + 1] << 8) |
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(data[offset + 2] << 16) |
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(data[offset + 3] * 0x1000000);
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};
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exports.readUInt32BE = function (data, offset) {
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return data[offset + 3] |
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(data[offset + 2] << 8) |
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(data[offset + 1] << 16) |
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(data[offset] * 0x1000000);
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};
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function ProbeError(message, code, statusCode) {
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Error.call(this);
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// Include stack trace in error object
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if (Error.captureStackTrace) {
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// Chrome and NodeJS
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Error.captureStackTrace(this, this.constructor);
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} else {
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// FF, IE 10+ and Safari 6+. Fallback for others
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this.stack = (new Error()).stack || '';
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}
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this.name = this.constructor.name;
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this.message = message;
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if (code) this.code = code;
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if (statusCode) this.statusCode = statusCode;
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}
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// Inherit from Error
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ProbeError.prototype = Object.create(Error.prototype);
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ProbeError.prototype.constructor = ProbeError;
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exports.ProbeError = ProbeError;
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