X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs-website;a=blobdiff_plain;f=node_modules%2Fcore-js%2Fmodules%2F_typed-buffer.js;fp=node_modules%2Fcore-js%2Fmodules%2F_typed-buffer.js;h=2129eea40fc1013a3630bfacbc85c38bbb996ded;hp=0000000000000000000000000000000000000000;hb=a2bd1bf0c2c1f1a17d188f4dc0726a45494cefae;hpb=57c063afa3f66b07c4bbddc2d6129a96d90f0aad diff --git a/node_modules/core-js/modules/_typed-buffer.js b/node_modules/core-js/modules/_typed-buffer.js new file mode 100644 index 000000000..2129eea40 --- /dev/null +++ b/node_modules/core-js/modules/_typed-buffer.js @@ -0,0 +1,273 @@ +'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 + , RangeError = global.RangeError + , Infinity = global.Infinity + , BaseBuffer = $ArrayBuffer + , abs = Math.abs + , pow = Math.pow + , 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; \ No newline at end of file