1
const chars="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",charsUrl="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_",genLookup=target=>{let lookupTemp=typeof Uint8Array==="undefined"?[]:new Uint8Array(256);for(let i=0;i<chars.length;i++){lookupTemp[target.charCodeAt(i)]=i}return lookupTemp},lookup=genLookup(chars),lookupUrl=genLookup(charsUrl);let base64={};base64.toArrayBuffer=(data,urlMode)=>{let bufferLength=data.length*.75,len=data.length,i,p=0,encoded1,encoded2,encoded3,encoded4;if(data[data.length-1]==="="){bufferLength--;if(data[data.length-2]==="="){bufferLength--}}const arraybuffer=new ArrayBuffer(bufferLength),bytes=new Uint8Array(arraybuffer),target=urlMode?lookupUrl:lookup;for(i=0;i<len;i+=4){encoded1=target[data.charCodeAt(i)];encoded2=target[data.charCodeAt(i+1)];encoded3=target[data.charCodeAt(i+2)];encoded4=target[data.charCodeAt(i+3)];bytes[p++]=encoded1<<2|encoded2>>4;bytes[p++]=(encoded2&15)<<4|encoded3>>2;bytes[p++]=(encoded3&3)<<6|encoded4&63}return arraybuffer};base64.fromArrayBuffer=(arrBuf,urlMode)=>{let bytes=new Uint8Array(arrBuf),i,len=bytes.length,result="",target=urlMode?charsUrl:chars;for(i=0;i<len;i+=3){result+=target[bytes[i]>>2];result+=target[(bytes[i]&3)<<4|bytes[i+1]>>4];result+=target[(bytes[i+1]&15)<<2|bytes[i+2]>>6];result+=target[bytes[i+2]&63]}if(len%3===2){result=result.substring(0,result.length-1)+(urlMode?"":"=")}else if(len%3===1){result=result.substring(0,result.length-2)+(urlMode?"":"==")}return result};base64.toString=(str,urlMode)=>{return(new TextDecoder).decode(base64.toArrayBuffer(str,urlMode))};base64.fromString=(str,urlMode)=>{return base64.fromArrayBuffer((new TextEncoder).encode(str),urlMode)};base64.validate=(encoded,urlMode)=>{if(!(typeof encoded==="string"||encoded instanceof String)){return false}try{if(urlMode){return/^[-A-Za-z0-9\-_]*$/.test(encoded)}else{return/^[-A-Za-z0-9+/]*={0,3}$/.test(encoded)}}catch(_e){return false}};base64.base64=base64;export{base64,base64 as default};