87 lines
2.2 KiB
JavaScript
87 lines
2.2 KiB
JavaScript
/*
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* bufferConversion.js
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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"use strict";
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var toBuffer = function(obj) {
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if(Buffer.isBuffer(obj))
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return obj;
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if(obj instanceof ArrayBuffer)
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obj = new Uint8Array(obj);
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if(obj instanceof Uint8Array) {
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var buf = new Buffer(obj.length);
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for(var i = 0; i < obj.length; ++i)
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buf[i] = obj[i];
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return buf;
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}
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if(typeof obj === 'string')
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return new Buffer(obj, 'utf8');
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throw new TypeError('toBuffer function expects a string, buffer, ArrayBuffer, or Uint8Array');
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};
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toBuffer.fromByteLiteral = function(str) {
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if(typeof str === 'string') {
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var buf = new Buffer(str.length);
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for(var i = 0; i < str.length; ++i) {
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if(str[i] > 255)
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throw new RangeError('fromByteLiteral string argument cannot have codepoints larger than 1 byte');
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buf[i] = str.charCodeAt(i);
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}
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return buf;
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}
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else
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throw new TypeError('fromByteLiteral function expects a string');
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};
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toBuffer.toByteLiteral = function(buf) {
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if(Buffer.isBuffer(buf))
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return String.fromCharCode.apply(null, buf);
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else
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throw new TypeError('toByteLiteral function expects a buffer');
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};
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toBuffer.printable = function(buf) {
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buf = toBuffer(buf);
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var out = '';
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for(var i = 0; i < buf.length; ++i) {
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if(buf[i] >= 32 && buf[i] < 127 && buf[i] !== 92)
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out += String.fromCharCode(buf[i]);
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else if(buf[i] === 92)
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out += '\\\\';
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else {
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var str = buf[i].toString(16);
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out += '\\x';
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if(str.length == 1)
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out += '0';
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out += str;
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}
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}
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return out;
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};
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module.exports = toBuffer;
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