1/* eslint-disable node/no-deprecated-api */ 2 3'use strict' 4 5var buffer = require('buffer') 6var Buffer = buffer.Buffer 7 8var safer = {} 9 10var key 11 12for (key in buffer) { 13 if (!buffer.hasOwnProperty(key)) continue 14 if (key === 'SlowBuffer' || key === 'Buffer') continue 15 safer[key] = buffer[key] 16} 17 18var Safer = safer.Buffer = {} 19for (key in Buffer) { 20 if (!Buffer.hasOwnProperty(key)) continue 21 if (key === 'allocUnsafe' || key === 'allocUnsafeSlow') continue 22 Safer[key] = Buffer[key] 23} 24 25safer.Buffer.prototype = Buffer.prototype 26 27if (!Safer.from || Safer.from === Uint8Array.from) { 28 Safer.from = function (value, encodingOrOffset, length) { 29 if (typeof value === 'number') { 30 throw new TypeError('The "value" argument must not be of type number. Received type ' + typeof value) 31 } 32 if (value && typeof value.length === 'undefined') { 33 throw new TypeError('The first argument must be one of type string, Buffer, ArrayBuffer, Array, or Array-like Object. Received type ' + typeof value) 34 } 35 return Buffer(value, encodingOrOffset, length) 36 } 37} 38 39if (!Safer.alloc) { 40 Safer.alloc = function (size, fill, encoding) { 41 if (typeof size !== 'number') { 42 throw new TypeError('The "size" argument must be of type number. Received type ' + typeof size) 43 } 44 if (size < 0 || size >= 2 * (1 << 30)) { 45 throw new RangeError('The value "' + size + '" is invalid for option "size"') 46 } 47 var buf = Buffer(size) 48 if (!fill || fill.length === 0) { 49 buf.fill(0) 50 } else if (typeof encoding === 'string') { 51 buf.fill(fill, encoding) 52 } else { 53 buf.fill(fill) 54 } 55 return buf 56 } 57} 58 59if (!safer.kStringMaxLength) { 60 try { 61 safer.kStringMaxLength = process.binding('buffer').kStringMaxLength 62 } catch (e) { 63 // we can't determine kStringMaxLength in environments where process.binding 64 // is unsupported, so let's not set it 65 } 66} 67 68if (!safer.constants) { 69 safer.constants = { 70 MAX_LENGTH: safer.kMaxLength 71 } 72 if (safer.kStringMaxLength) { 73 safer.constants.MAX_STRING_LENGTH = safer.kStringMaxLength 74 } 75} 76 77module.exports = safer 78