| 'use strict'; |
| var global = require('./_global') |
| , DESCRIPTORS = require('./_descriptors') |
| , LIBRARY = require('./_library') |
| , $typed = require('./_typed') |
| , hide = require('./_hide') |
| , redefineAll = require('./_redefine-all') |
| , fails = require('./_fails') |
| , anInstance = require('./_an-instance') |
| , toInteger = require('./_to-integer') |
| , toLength = require('./_to-length') |
| , gOPN = require('./_object-gopn').f |
| , dP = require('./_object-dp').f |
| , arrayFill = require('./_array-fill') |
| , setToStringTag = require('./_set-to-string-tag') |
| , ARRAY_BUFFER = 'ArrayBuffer' |
| , DATA_VIEW = 'DataView' |
| , PROTOTYPE = 'prototype' |
| , WRONG_LENGTH = 'Wrong length!' |
| , WRONG_INDEX = 'Wrong index!' |
| , $ArrayBuffer = global[ARRAY_BUFFER] |
| , $DataView = global[DATA_VIEW] |
| , Math = global.Math |
| , parseInt = global.parseInt |
| , RangeError = global.RangeError |
| , Infinity = global.Infinity |
| , BaseBuffer = $ArrayBuffer |
| , abs = Math.abs |
| , pow = Math.pow |
| , min = Math.min |
| , floor = Math.floor |
| , log = Math.log |
| , LN2 = Math.LN2 |
| , BUFFER = 'buffer' |
| , BYTE_LENGTH = 'byteLength' |
| , BYTE_OFFSET = 'byteOffset' |
| , $BUFFER = DESCRIPTORS ? '_b' : BUFFER |
| , $LENGTH = DESCRIPTORS ? '_l' : BYTE_LENGTH |
| , $OFFSET = DESCRIPTORS ? '_o' : BYTE_OFFSET; |
| |
| // IEEE754 conversions based on https://github.com/feross/ieee754 |
| var packIEEE754 = function(value, mLen, nBytes){ |
| var buffer = Array(nBytes) |
| , eLen = nBytes * 8 - mLen - 1 |
| , eMax = (1 << eLen) - 1 |
| , eBias = eMax >> 1 |
| , rt = mLen === 23 ? pow(2, -24) - pow(2, -77) : 0 |
| , i = 0 |
| , s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0 |
| , e, m, c; |
| value = abs(value) |
| if(value != value || value === Infinity){ |
| m = value != value ? 1 : 0; |
| e = eMax; |
| } else { |
| e = floor(log(value) / LN2); |
| if(value * (c = pow(2, -e)) < 1){ |
| e--; |
| c *= 2; |
| } |
| if(e + eBias >= 1){ |
| value += rt / c; |
| } else { |
| value += rt * pow(2, 1 - eBias); |
| } |
| if(value * c >= 2){ |
| e++; |
| c /= 2; |
| } |
| if(e + eBias >= eMax){ |
| m = 0; |
| e = eMax; |
| } else if(e + eBias >= 1){ |
| m = (value * c - 1) * pow(2, mLen); |
| e = e + eBias; |
| } else { |
| m = value * pow(2, eBias - 1) * pow(2, mLen); |
| e = 0; |
| } |
| } |
| for(; mLen >= 8; buffer[i++] = m & 255, m /= 256, mLen -= 8); |
| e = e << mLen | m; |
| eLen += mLen; |
| for(; eLen > 0; buffer[i++] = e & 255, e /= 256, eLen -= 8); |
| buffer[--i] |= s * 128; |
| return buffer; |
| }; |
| var unpackIEEE754 = function(buffer, mLen, nBytes){ |
| var eLen = nBytes * 8 - mLen - 1 |
| , eMax = (1 << eLen) - 1 |
| , eBias = eMax >> 1 |
| , nBits = eLen - 7 |
| , i = nBytes - 1 |
| , s = buffer[i--] |
| , e = s & 127 |
| , m; |
| s >>= 7; |
| for(; nBits > 0; e = e * 256 + buffer[i], i--, nBits -= 8); |
| m = e & (1 << -nBits) - 1; |
| e >>= -nBits; |
| nBits += mLen; |
| for(; nBits > 0; m = m * 256 + buffer[i], i--, nBits -= 8); |
| if(e === 0){ |
| e = 1 - eBias; |
| } else if(e === eMax){ |
| return m ? NaN : s ? -Infinity : Infinity; |
| } else { |
| m = m + pow(2, mLen); |
| e = e - eBias; |
| } return (s ? -1 : 1) * m * pow(2, e - mLen); |
| }; |
| |
| var unpackI32 = function(bytes){ |
| return bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0]; |
| }; |
| var packI8 = function(it){ |
| return [it & 0xff]; |
| }; |
| var packI16 = function(it){ |
| return [it & 0xff, it >> 8 & 0xff]; |
| }; |
| var packI32 = function(it){ |
| return [it & 0xff, it >> 8 & 0xff, it >> 16 & 0xff, it >> 24 & 0xff]; |
| }; |
| var packF64 = function(it){ |
| return packIEEE754(it, 52, 8); |
| }; |
| var packF32 = function(it){ |
| return packIEEE754(it, 23, 4); |
| }; |
| |
| var addGetter = function(C, key, internal){ |
| dP(C[PROTOTYPE], key, {get: function(){ return this[internal]; }}); |
| }; |
| |
| var get = function(view, bytes, index, isLittleEndian){ |
| var numIndex = +index |
| , intIndex = toInteger(numIndex); |
| if(numIndex != intIndex || intIndex < 0 || intIndex + bytes > view[$LENGTH])throw RangeError(WRONG_INDEX); |
| var store = view[$BUFFER]._b |
| , start = intIndex + view[$OFFSET] |
| , pack = store.slice(start, start + bytes); |
| return isLittleEndian ? pack : pack.reverse(); |
| }; |
| var set = function(view, bytes, index, conversion, value, isLittleEndian){ |
| var numIndex = +index |
| , intIndex = toInteger(numIndex); |
| if(numIndex != intIndex || intIndex < 0 || intIndex + bytes > view[$LENGTH])throw RangeError(WRONG_INDEX); |
| var store = view[$BUFFER]._b |
| , start = intIndex + view[$OFFSET] |
| , pack = conversion(+value); |
| for(var i = 0; i < bytes; i++)store[start + i] = pack[isLittleEndian ? i : bytes - i - 1]; |
| }; |
| |
| var validateArrayBufferArguments = function(that, length){ |
| anInstance(that, $ArrayBuffer, ARRAY_BUFFER); |
| var numberLength = +length |
| , byteLength = toLength(numberLength); |
| if(numberLength != byteLength)throw RangeError(WRONG_LENGTH); |
| return byteLength; |
| }; |
| |
| if(!$typed.ABV){ |
| $ArrayBuffer = function ArrayBuffer(length){ |
| var byteLength = validateArrayBufferArguments(this, length); |
| this._b = arrayFill.call(Array(byteLength), 0); |
| this[$LENGTH] = byteLength; |
| }; |
| |
| $DataView = function DataView(buffer, byteOffset, byteLength){ |
| anInstance(this, $DataView, DATA_VIEW); |
| anInstance(buffer, $ArrayBuffer, DATA_VIEW); |
| var bufferLength = buffer[$LENGTH] |
| , offset = toInteger(byteOffset); |
| if(offset < 0 || offset > bufferLength)throw RangeError('Wrong offset!'); |
| byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength); |
| if(offset + byteLength > bufferLength)throw RangeError(WRONG_LENGTH); |
| this[$BUFFER] = buffer; |
| this[$OFFSET] = offset; |
| this[$LENGTH] = byteLength; |
| }; |
| |
| if(DESCRIPTORS){ |
| addGetter($ArrayBuffer, BYTE_LENGTH, '_l'); |
| addGetter($DataView, BUFFER, '_b'); |
| addGetter($DataView, BYTE_LENGTH, '_l'); |
| addGetter($DataView, BYTE_OFFSET, '_o'); |
| } |
| |
| redefineAll($DataView[PROTOTYPE], { |
| getInt8: function getInt8(byteOffset){ |
| return get(this, 1, byteOffset)[0] << 24 >> 24; |
| }, |
| getUint8: function getUint8(byteOffset){ |
| return get(this, 1, byteOffset)[0]; |
| }, |
| getInt16: function getInt16(byteOffset /*, littleEndian */){ |
| var bytes = get(this, 2, byteOffset, arguments[1]); |
| return (bytes[1] << 8 | bytes[0]) << 16 >> 16; |
| }, |
| getUint16: function getUint16(byteOffset /*, littleEndian */){ |
| var bytes = get(this, 2, byteOffset, arguments[1]); |
| return bytes[1] << 8 | bytes[0]; |
| }, |
| getInt32: function getInt32(byteOffset /*, littleEndian */){ |
| return unpackI32(get(this, 4, byteOffset, arguments[1])); |
| }, |
| getUint32: function getUint32(byteOffset /*, littleEndian */){ |
| return unpackI32(get(this, 4, byteOffset, arguments[1])) >>> 0; |
| }, |
| getFloat32: function getFloat32(byteOffset /*, littleEndian */){ |
| return unpackIEEE754(get(this, 4, byteOffset, arguments[1]), 23, 4); |
| }, |
| getFloat64: function getFloat64(byteOffset /*, littleEndian */){ |
| return unpackIEEE754(get(this, 8, byteOffset, arguments[1]), 52, 8); |
| }, |
| setInt8: function setInt8(byteOffset, value){ |
| set(this, 1, byteOffset, packI8, value); |
| }, |
| setUint8: function setUint8(byteOffset, value){ |
| set(this, 1, byteOffset, packI8, value); |
| }, |
| setInt16: function setInt16(byteOffset, value /*, littleEndian */){ |
| set(this, 2, byteOffset, packI16, value, arguments[2]); |
| }, |
| setUint16: function setUint16(byteOffset, value /*, littleEndian */){ |
| set(this, 2, byteOffset, packI16, value, arguments[2]); |
| }, |
| setInt32: function setInt32(byteOffset, value /*, littleEndian */){ |
| set(this, 4, byteOffset, packI32, value, arguments[2]); |
| }, |
| setUint32: function setUint32(byteOffset, value /*, littleEndian */){ |
| set(this, 4, byteOffset, packI32, value, arguments[2]); |
| }, |
| setFloat32: function setFloat32(byteOffset, value /*, littleEndian */){ |
| set(this, 4, byteOffset, packF32, value, arguments[2]); |
| }, |
| setFloat64: function setFloat64(byteOffset, value /*, littleEndian */){ |
| set(this, 8, byteOffset, packF64, value, arguments[2]); |
| } |
| }); |
| } else { |
| if(!fails(function(){ |
| new $ArrayBuffer; // eslint-disable-line no-new |
| }) || !fails(function(){ |
| new $ArrayBuffer(.5); // eslint-disable-line no-new |
| })){ |
| $ArrayBuffer = function ArrayBuffer(length){ |
| return new BaseBuffer(validateArrayBufferArguments(this, length)); |
| }; |
| var ArrayBufferProto = $ArrayBuffer[PROTOTYPE] = BaseBuffer[PROTOTYPE]; |
| for(var keys = gOPN(BaseBuffer), j = 0, key; keys.length > j; ){ |
| if(!((key = keys[j++]) in $ArrayBuffer))hide($ArrayBuffer, key, BaseBuffer[key]); |
| }; |
| if(!LIBRARY)ArrayBufferProto.constructor = $ArrayBuffer; |
| } |
| // iOS Safari 7.x bug |
| var view = new $DataView(new $ArrayBuffer(2)) |
| , $setInt8 = $DataView[PROTOTYPE].setInt8; |
| view.setInt8(0, 2147483648); |
| view.setInt8(1, 2147483649); |
| if(view.getInt8(0) || !view.getInt8(1))redefineAll($DataView[PROTOTYPE], { |
| setInt8: function setInt8(byteOffset, value){ |
| $setInt8.call(this, byteOffset, value << 24 >> 24); |
| }, |
| setUint8: function setUint8(byteOffset, value){ |
| $setInt8.call(this, byteOffset, value << 24 >> 24); |
| } |
| }, true); |
| } |
| setToStringTag($ArrayBuffer, ARRAY_BUFFER); |
| setToStringTag($DataView, DATA_VIEW); |
| hide($DataView[PROTOTYPE], $typed.VIEW, true); |
| exports[ARRAY_BUFFER] = $ArrayBuffer; |
| exports[DATA_VIEW] = $DataView; |