browser-buffer.min.js

(function(){"use strict";function isArrayIsh(subject){return Buffer.isBuffer(subject)||subject&&typeof subject==="object"&&typeof subject.length==="number"}function coerce(length){length=~~Math.ceil(+length);return length<0?0:length}function ok(cond,msg){if(!cond)throw new Error(msg)}var ArrayBuffer=window.ArrayBuffer||function(len){this.length=len;while(len--)this[len]=0},Uint8Array=window.Uint8Array||function(parent,offset,length){this.buffer=parent;this.offset=offset;this.length=length},__set="Uint8Array"in window&&Uint8Array.prototype.set;window.Uint8Array||(Uint8Array.prototype={get:function(ind){return this.buffer[ind+this.offset]},set:function(ind,value){this.buffer[ind+this.offset]=value}});var makeBuffer=function(parent,offset,length){var buf=new Uint8Array(parent,offset,length);buf.parent=parent;buf.offset=offset;return buf},Buffer=function(subject,encoding,offset){var type,length,parent,ret;if(typeof offset==="number"){length=coerce(encoding);parent=subject}else{switch(type=typeof subject){case"number":length=coerce(subject);break;case"string":length=Buffer.byteLength(subject,encoding);break;case"object":length=coerce(subject.length);break;default:throw new Error("First argument needs to be a number, "+"array or string.")}if(length>Buffer.poolSize){parent=new ArrayBuffer(length);offset=0}else{if(!pool||pool.byteLength-pool.used<length)allocPool();parent=pool;offset=pool.used;pool.used+=length}if(isArrayIsh(subject)){ret=makeBuffer(parent,offset,length);var i=length;while(i--){ret[i]=subject[i]}}else if(type=="string"){ret=makeBuffer(parent,offset,length);length=ret.write(subject,0,encoding)}}return ret||makeBuffer(parent,offset,length)},proto=Buffer.prototype=Uint8Array.prototype;proto.toString=function(encoding,start,end){encoding=String(encoding||"utf8").toLowerCase();start=+start||0;if(typeof end=="undefined")end=this.length;if(+end==start){return""}switch(encoding){case"hex":return this.hexSlice(start,end);case"utf8":case"utf-8":return this.utf8Slice(start,end);case"ascii":return this.asciiSlice(start,end);case"base64":return this.base64Slice(start,end);default:throw new Error("Unknown encoding")}};proto.write=function(string,offset,length,encoding){if(isFinite(offset)){if(!isFinite(length)){encoding=length;length=undefined}}else{var swap=encoding;encoding=offset;offset=length;length=swap}offset=+offset||0;var remaining=this.length-offset;if(!length){length=remaining}else{length=+length;if(length>remaining){length=remaining}}encoding=String(encoding||"utf8").toLowerCase();switch(encoding){case"hex":return this.hexWrite(string,offset,length);case"utf8":case"utf-8":return this.utf8Write(string,offset,length);case"ascii":return this.asciiWrite(string,offset,length);case"base64":return this.base64Write(string,offset,length);default:throw new Error("Unknown encoding")}};var fCC=String.fromCharCode;proto.utf8Write=function(string,start,end){for(var i=0,l=start,le=string.length,d=end-start;i<d&&i<le;i++){var c=string.charCodeAt(i);if(c<128){this[l++]=c}else if(c>127&&c<2048){this[l++]=c>>6|192;this[l++]=c&63|128}else{this[l++]=c>>12|224;this[l++]=c>>6&63|128;this[l++]=c&63|128}}this._charsWritten=l;return le};proto.utf8Slice=function(start,end){for(var string="",c,i=start,p=0,c2,c3;p<end&&(c=this[i]);i++){p++;if(c<128){string+=fCC(c)}else if(c>191&&c<224){c2=this[i+1];string+=fCC((c&31)<<6|c2&63);i++}else{c2=this[i+1];c3=this[i+2];string+=fCC((c&15)<<12|(c2&63)<<6|c3&63);i+=2}}return string};proto.asciiWrite=function(string,start,end){for(var i=0,le=string.length;i<end&&i<le;i++){this[i+start]=string.charCodeAt(i)}this._charsWritten=i;return le};proto.asciiSlice=function(start,end){for(var string="",i=start;i<end;i++){string+=fCC(this[i])}return string};function toHex(n){if(n<16)return"0"+n.toString(16);return n.toString(16)}proto.hexWrite=function(string,start,end){var charset="0123456789abcdef";string=string.toLowerCase();for(var i=0,le=string.length,byteCount=0;i/2<end&&i<le;i+=2,byteCount++){var p1=string[i];var p2=string[i+1];var b=charVal(p1)<<4|charVal(p2);this[byteCount+start]=b}function charVal(c){for(var i=0;i<charset.length;i++){if(c==charset[i])return i}throw new Error("Invalid hex string")}};proto.hexSlice=function(start,end){var len=this.length;if(!start||start<0)start=0;if(!end||end<0||end>len)end=len;var out="";for(var i=start;i<end;i++){out+=toHex(this[i])}return out};proto.copy=function(target,tStart,sStart,sEnd){for(var i=0,d=sEnd-sStart;i<d;i++){target[i+tStart]=this[i+sStart]}};proto.base64Slice=function(start,end){var len=this.length;if(!start||start<0)start=0;if(!end||end<0||end>len)end=len;var data=this.utf8Slice(start,end);return btoa(data)};proto.base64Write=function(string,start,end){var data=window.atob(string);for(var i=0,le=data.length;i<end&&i<le;i++){this[i+start]=atob(data.charCodeAt(i))}this._charsWritten=i;return le};proto.slice=function(start,end){if(end===undefined)end=this.length;if(end>this.length){throw new Error("oob")}if(start>end){throw new Error("oob")}return makeBuffer(this.buffer,+start,end-start)};proto.toBlob=function(){var b=new(window.BlobBuilder||window.WebKitBlobBuilder||window.MozBlobBuilder);this.offset?b.append(this.toString("utf8")):b.append(this.buffer);return b.getBlob()};proto.readUInt8=function(offset,noAssert){var buffer=this;if(!noAssert){ok(offset!==undefined&&offset!==null,"missing offset");ok(offset<buffer.length,"Trying to read beyond buffer length")}return buffer[offset]};function readUInt16(buffer,offset,isBigEndian,noAssert){var val=0;if(!noAssert){ok(typeof isBigEndian==="boolean","missing or invalid endian");ok(offset!==undefined&&offset!==null,"missing offset");ok(offset+1<buffer.length,"Trying to read beyond buffer length")}if(isBigEndian){val=buffer[offset]<<8;val|=buffer[offset+1]}else{val=buffer[offset];val|=buffer[offset+1]<<8}return val}proto.readUInt16LE=function(offset,noAssert){return readUInt16(this,offset,false,noAssert)};proto.readUInt16BE=function(offset,noAssert){return readUInt16(this,offset,true,noAssert)};function readUInt32(buffer,offset,isBigEndian,noAssert){var val=0;if(!noAssert){ok(typeof isBigEndian==="boolean","missing or invalid endian");ok(offset!==undefined&&offset!==null,"missing offset");ok(offset+3<buffer.length,"Trying to read beyond buffer length")}if(isBigEndian){val=buffer[offset+1]<<16;val|=buffer[offset+2]<<8;val|=buffer[offset+3];val=val+(buffer[offset]<<24>>>0)}else{val=buffer[offset+2]<<16;val|=buffer[offset+1]<<8;val|=buffer[offset];val=val+(buffer[offset+3]<<24>>>0)}return val}proto.readUInt32LE=function(offset,noAssert){return readUInt32(this,offset,false,noAssert)};proto.readUInt32BE=function(offset,noAssert){return readUInt32(this,offset,true,noAssert)};proto.readInt8=function(offset,noAssert){var buffer=this;var neg;if(!noAssert){ok(offset!==undefined&&offset!==null,"missing offset");ok(offset<buffer.length,"Trying to read beyond buffer length")}neg=buffer[offset]&128;if(!neg){return buffer[offset]}return(255-buffer[offset]+1)*-1};function readInt16(buffer,offset,isBigEndian,noAssert){var neg,val;if(!noAssert){ok(typeof isBigEndian==="boolean","missing or invalid endian");ok(offset!==undefined&&offset!==null,"missing offset");ok(offset+1<buffer.length,"Trying to read beyond buffer length")}val=readUInt16(buffer,offset,isBigEndian,noAssert);neg=val&32768;if(!neg){return val}return(65535-val+1)*-1}proto.readInt16LE=function(offset,noAssert){return readInt16(this,offset,false,noAssert)};proto.readInt16BE=function(offset,noAssert){return readInt16(this,offset,true,noAssert)};function readInt32(buffer,offset,isBigEndian,noAssert){var neg,val;if(!noAssert){ok(typeof isBigEndian==="boolean","missing or invalid endian");ok(offset!==undefined&&offset!==null,"missing offset");ok(offset+3<buffer.length,"Trying to read beyond buffer length")}val=readUInt32(buffer,offset,isBigEndian,noAssert);neg=val&2147483648;if(!neg){return val}return(4294967295-val+1)*-1}proto.readInt32LE=function(offset,noAssert){return readInt32(this,offset,false,noAssert)};proto.readInt32BE=function(offset,noAssert){return readInt32(this,offset,true,noAssert)};function readIEEE754(buffer,offset,isBE,mLen,nBytes){var e,m,eLen=nBytes*8-mLen-1,eMax=(1<<eLen)-1,eBias=eMax>>1,nBits=-7,i=isBE?0:nBytes-1,d=isBE?1:-1,s=buffer[offset+i];i+=d;e=s&(1<<-nBits)-1;s>>=-nBits;nBits+=eLen;for(;nBits>0;e=e*256+buffer[offset+i],i+=d,nBits-=8);m=e&(1<<-nBits)-1;e>>=-nBits;nBits+=mLen;for(;nBits>0;m=m*256+buffer[offset+i],i+=d,nBits-=8);if(e===0){e=1-eBias}else if(e===eMax){return m?NaN:(s?-1:1)*Infinity}else{m=m+Math.pow(2,mLen);e=e-eBias}return(s?-1:1)*m*Math.pow(2,e-mLen)}function readFloat(buffer,offset,isBigEndian,noAssert){if(!noAssert){ok(typeof isBigEndian==="boolean","missing or invalid endian");ok(offset+3<buffer.length,"Trying to read beyond buffer length")}return readIEEE754(buffer,offset,isBigEndian,23,4)}proto.readFloatLE=function(offset,noAssert){return readFloat(this,offset,false,noAssert)};proto.readFloatBE=function(offset,noAssert){return readFloat(this,offset,true,noAssert)};function readDouble(buffer,offset,isBigEndian,noAssert){if(!noAssert){ok(typeof isBigEndian==="boolean","missing or invalid endian");ok(offset+7<buffer.length,"Trying to read beyond buffer length")}return readIEEE754(buffer,offset,isBigEndian,52,8)}proto.readDoubleLE=function(offset,noAssert){return readDouble(this,offset,false,noAssert)};proto.readDoubleBE=function(offset,noAssert){return readDouble(this,offset,true,noAssert)};function verifuint(value,max){ok(typeof value=="number","cannot write a non-number as a number");ok(value>=0,"specified a negative value for writing an unsigned value");ok(value<=max,"value is larger than maximum value for type");ok(Math.floor(value)===value,"value has a fractional component")}proto.writeUInt8=function(value,offset,noAssert){var buffer=this;if(!noAssert){ok(value!==undefined&&value!==null,"missing value");ok(offset!==undefined&&offset!==null,"missing offset");ok(offset<buffer.length,"trying to write beyond buffer length");verifuint(value,255)}buffer[offset]=value};function writeUInt16(buffer,value,offset,isBigEndian,noAssert){if(!noAssert){ok(value!==undefined&&value!==null,"missing value");ok(typeof isBigEndian==="boolean","missing or invalid endian");ok(offset!==undefined&&offset!==null,"missing offset");ok(offset+1<buffer.length,"trying to write beyond buffer length");verifuint(value,65535)}if(isBigEndian){buffer[offset]=(value&65280)>>>8;buffer[offset+1]=value&255}else{buffer[offset+1]=(value&65280)>>>8;buffer[offset]=value&255}}proto.writeUInt16LE=function(value,offset,noAssert){writeUInt16(this,value,offset,false,noAssert)};proto.writeUInt16BE=function(value,offset,noAssert){writeUInt16(this,value,offset,true,noAssert)};function writeUInt32(buffer,value,offset,isBigEndian,noAssert){if(!noAssert){ok(value!==undefined&&value!==null,"missing value");ok(typeof isBigEndian==="boolean","missing or invalid endian");ok(offset!==undefined&&offset!==null,"missing offset");ok(offset+3<buffer.length,"trying to write beyond buffer length");verifuint(value,4294967295)}if(isBigEndian){buffer[offset]=value>>>24&255;buffer[offset+1]=value>>>16&255;buffer[offset+2]=value>>>8&255;buffer[offset+3]=value&255}else{buffer[offset+3]=value>>>24&255;buffer[offset+2]=value>>>16&255;buffer[offset+1]=value>>>8&255;buffer[offset]=value&255}}proto.writeUInt32LE=function(value,offset,noAssert){writeUInt32(this,value,offset,false,noAssert)};proto.writeUInt32BE=function(value,offset,noAssert){writeUInt32(this,value,offset,true,noAssert)};function verifsint(value,max,min){ok(typeof value=="number","cannot write a non-number as a number");ok(value<=max,"value larger than maximum allowed value");ok(value>=min,"value smaller than minimum allowed value");ok(Math.floor(value)===value,"value has a fractional component")}function verifIEEE754(value,max,min){ok(typeof value=="number","cannot write a non-number as a number");ok(value<=max,"value larger than maximum allowed value");ok(value>=min,"value smaller than minimum allowed value")}proto.writeInt8=function(value,offset,noAssert){var buffer=this;if(!noAssert){ok(value!==undefined&&value!==null,"missing value");ok(offset!==undefined&&offset!==null,"missing offset");ok(offset<buffer.length,"Trying to write beyond buffer length");verifsint(value,127,-128)}if(value>=0){buffer.writeUInt8(value,offset,noAssert)}else{buffer.writeUInt8(255+value+1,offset,noAssert)}};function writeInt16(buffer,value,offset,isBigEndian,noAssert){if(!noAssert){ok(value!==undefined&&value!==null,"missing value");ok(typeof isBigEndian==="boolean","missing or invalid endian");ok(offset!==undefined&&offset!==null,"missing offset");ok(offset+1<buffer.length,"Trying to write beyond buffer length");verifsint(value,32767,-32768)}if(value>=0){writeUInt16(buffer,value,offset,isBigEndian,noAssert)}else{writeUInt16(buffer,65535+value+1,offset,isBigEndian,noAssert)}}proto.writeInt16LE=function(value,offset,noAssert){writeInt16(this,value,offset,false,noAssert)};proto.writeInt16BE=function(value,offset,noAssert){writeInt16(this,value,offset,true,noAssert)};function writeInt32(buffer,value,offset,isBigEndian,noAssert){if(!noAssert){ok(value!==undefined&&value!==null,"missing value");ok(typeof isBigEndian==="boolean","missing or invalid endian");ok(offset!==undefined&&offset!==null,"missing offset");ok(offset+3<buffer.length,"Trying to write beyond buffer length");verifsint(value,2147483647,-2147483648)}if(value>=0){writeUInt32(buffer,value,offset,isBigEndian,noAssert)}else{writeUInt32(buffer,4294967295+value+1,offset,isBigEndian,noAssert)}}proto.writeInt32LE=function(value,offset,noAssert){writeInt32(this,value,offset,false,noAssert)};proto.writeInt32BE=function(value,offset,noAssert){writeInt32(this,value,offset,true,noAssert)};function writeIEEE754(buffer,value,offset,isBE,mLen,nBytes){var e,m,c,eLen=nBytes*8-mLen-1,eMax=(1<<eLen)-1,eBias=eMax>>1,rt=mLen===23?Math.pow(2,-24)-Math.pow(2,-77):0,i=isBE?nBytes-1:0,d=isBE?-1:1,s=value<0||value===0&&1/value<0?1:0;value=Math.abs(value);if(isNaN(value)||value===Infinity){m=isNaN(value)?1:0;e=eMax}else{e=Math.floor(Math.log(value)/Math.LN2);if(value*(c=Math.pow(2,-e))<1){e--;c*=2}if(e+eBias>=1){value+=rt/c}else{value+=rt*Math.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)*Math.pow(2,mLen);e=e+eBias}else{m=value*Math.pow(2,eBias-1)*Math.pow(2,mLen);e=0}}for(;mLen>=8;buffer[offset+i]=m&255,i+=d,m/=256,mLen-=8);e=e<<mLen|m;eLen+=mLen;for(;eLen>0;buffer[offset+i]=e&255,i+=d,e/=256,eLen-=8);buffer[offset+i-d]|=s*128}function writeFloat(buffer,value,offset,isBigEndian,noAssert){if(!noAssert){ok(value!==undefined&&value!==null,"missing value");ok(typeof isBigEndian==="boolean","missing or invalid endian");ok(offset!==undefined&&offset!==null,"missing offset");ok(offset+3<buffer.length,"Trying to write beyond buffer length");verifIEEE754(value,3.4028234663852886e38,-3.4028234663852886e38)}writeIEEE754(buffer,value,offset,isBigEndian,23,4)}proto.writeFloatLE=function(value,offset,noAssert){writeFloat(this,value,offset,false,noAssert)};proto.writeFloatBE=function(value,offset,noAssert){writeFloat(this,value,offset,true,noAssert)};function writeDouble(buffer,value,offset,isBigEndian,noAssert){if(!noAssert){ok(value!==undefined&&value!==null,"missing value");ok(typeof isBigEndian==="boolean","missing or invalid endian");ok(offset!==undefined&&offset!==null,"missing offset");ok(offset+7<buffer.length,"Trying to write beyond buffer length");verifIEEE754(value,1.7976931348623157e308,-1.7976931348623157e308)}writeIEEE754(buffer,value,offset,isBigEndian,52,8)}proto.writeDoubleLE=function(value,offset,noAssert){writeDouble(this,value,offset,false,noAssert)};proto.writeDoubleBE=function(value,offset,noAssert){writeDouble(this,value,offset,true,noAssert)};var pool;Buffer.poolSize=8*1024;function allocPool(){pool=new ArrayBuffer(Buffer.poolSize);pool.used=0}Buffer.isBuffer=function isBuffer(b){return b instanceof Buffer||b instanceof ArrayBuffer};Buffer.byteLength=function(string,encoding){switch(encoding){case"ascii":return string.length;case"hex":return string.length/2}for(var i=0,l=0,le=string.length,c;i<le;i++){c=string.charCodeAt(i);if(c<128){l++}else if(c>127&&c<2048){l+=2}else{l+=3}}return l};window.Buffer=Buffer})();