twitst4tz

twitter statistics web application
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safer.js (2110B)

      1 /* eslint-disable node/no-deprecated-api */
      2 
      3 'use strict'
      4 
      5 var buffer = require('buffer')
      6 var Buffer = buffer.Buffer
      7 
      8 var safer = {}
      9 
     10 var key
     11 
     12 for (key in buffer) {
     13   if (!buffer.hasOwnProperty(key)) continue
     14   if (key === 'SlowBuffer' || key === 'Buffer') continue
     15   safer[key] = buffer[key]
     16 }
     17 
     18 var Safer = safer.Buffer = {}
     19 for (key in Buffer) {
     20   if (!Buffer.hasOwnProperty(key)) continue
     21   if (key === 'allocUnsafe' || key === 'allocUnsafeSlow') continue
     22   Safer[key] = Buffer[key]
     23 }
     24 
     25 safer.Buffer.prototype = Buffer.prototype
     26 
     27 if (!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 
     39 if (!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 
     59 if (!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 
     68 if (!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 
     77 module.exports = safer