aaac7fed
 liuqimichale
add
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/* eslint-disable node/no-deprecated-api */
'use strict'
var buffer = require('buffer')
var Buffer = buffer.Buffer
var safer = {}
var key
for (key in buffer) {
if (!buffer.hasOwnProperty(key)) continue
if (key === 'SlowBuffer' || key === 'Buffer') continue
safer[key] = buffer[key]
}
var Safer = safer.Buffer = {}
for (key in Buffer) {
if (!Buffer.hasOwnProperty(key)) continue
if (key === 'allocUnsafe' || key === 'allocUnsafeSlow') continue
Safer[key] = Buffer[key]
}
safer.Buffer.prototype = Buffer.prototype
if (!Safer.from || Safer.from === Uint8Array.from) {
Safer.from = function (value, encodingOrOffset, length) {
if (typeof value === 'number') {
throw new TypeError('The "value" argument must not be of type number. Received type ' + typeof value)
}
if (value && typeof value.length === 'undefined') {
throw new TypeError('The first argument must be one of type string, Buffer, ArrayBuffer, Array, or Array-like Object. Received type ' + typeof value)
}
return Buffer(value, encodingOrOffset, length)
}
}
if (!Safer.alloc) {
Safer.alloc = function (size, fill, encoding) {
if (typeof size !== 'number') {
throw new TypeError('The "size" argument must be of type number. Received type ' + typeof size)
}
if (size < 0 || size >= 2 * (1 << 30)) {
throw new RangeError('The value "' + size + '" is invalid for option "size"')
}
var buf = Buffer(size)
if (!fill || fill.length === 0) {
buf.fill(0)
} else if (typeof encoding === 'string') {
buf.fill(fill, encoding)
} else {
buf.fill(fill)
}
return buf
}
}
if (!safer.kStringMaxLength) {
try {
safer.kStringMaxLength = process.binding('buffer').kStringMaxLength
} catch (e) {
// we can't determine kStringMaxLength in environments where process.binding
// is unsupported, so let's not set it
}
}
if (!safer.constants) {
safer.constants = {
MAX_LENGTH: safer.kMaxLength
}
if (safer.kStringMaxLength) {
safer.constants.MAX_STRING_LENGTH = safer.kStringMaxLength
}
}
module.exports = safer
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