1 |
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2 |
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3 | 'use strict'
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4 |
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5 | var buffer = require('buffer')
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6 | var Buffer = buffer.Buffer
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7 |
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8 | var safer = {}
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9 |
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10 | var key
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11 |
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12 | for (key in buffer) {
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13 | if (!buffer.hasOwnProperty(key)) continue
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14 | if (key === 'SlowBuffer' || key === 'Buffer') continue
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15 | safer[key] = buffer[key]
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16 | }
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17 |
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18 | var Safer = safer.Buffer = {}
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19 | for (key in Buffer) {
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20 | if (!Buffer.hasOwnProperty(key)) continue
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21 | if (key === 'allocUnsafe' || key === 'allocUnsafeSlow') continue
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22 | Safer[key] = Buffer[key]
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23 | }
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24 |
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25 | safer.Buffer.prototype = Buffer.prototype
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26 |
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27 | if (!Safer.from || Safer.from === Uint8Array.from) {
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28 | Safer.from = function (value, encodingOrOffset, length) {
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29 | if (typeof value === 'number') {
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30 | throw new TypeError('The "value" argument must not be of type number. Received type ' + typeof value)
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31 | }
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32 | if (value && typeof value.length === 'undefined') {
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33 | throw new TypeError('The first argument must be one of type string, Buffer, ArrayBuffer, Array, or Array-like Object. Received type ' + typeof value)
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34 | }
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35 | return Buffer(value, encodingOrOffset, length)
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36 | }
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37 | }
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38 |
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39 | if (!Safer.alloc) {
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40 | Safer.alloc = function (size, fill, encoding) {
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41 | if (typeof size !== 'number') {
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42 | throw new TypeError('The "size" argument must be of type number. Received type ' + typeof size)
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43 | }
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44 | if (size < 0 || size >= 2 * (1 << 30)) {
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45 | throw new RangeError('The value "' + size + '" is invalid for option "size"')
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46 | }
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47 | var buf = Buffer(size)
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48 | if (!fill || fill.length === 0) {
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49 | buf.fill(0)
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50 | } else if (typeof encoding === 'string') {
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51 | buf.fill(fill, encoding)
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52 | } else {
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53 | buf.fill(fill)
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54 | }
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55 | return buf
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56 | }
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57 | }
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58 |
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59 | if (!safer.kStringMaxLength) {
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60 | try {
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61 | safer.kStringMaxLength = process.binding('buffer').kStringMaxLength
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62 | } catch (e) {
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63 |
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64 |
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65 | }
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66 | }
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67 |
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68 | if (!safer.constants) {
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69 | safer.constants = {
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70 | MAX_LENGTH: safer.kMaxLength
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71 | }
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72 | if (safer.kStringMaxLength) {
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73 | safer.constants.MAX_STRING_LENGTH = safer.kStringMaxLength
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74 | }
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75 | }
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76 |
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77 | module.exports = safer
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