CryptoJS Changeset - 63e17c1c419e

Changeset - 63e17c1c419e

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Laman - 5 years ago 2019-06-29 14:48:23

String <--> UTF-8 conversion

1 file changed with 38 insertions and 5 deletions:

util.js

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util.js

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@@ @@ -23,37 +23,70 @@ function int322bytes(x){ @@
 function int32s2bytes(arr){
 	return arr.map(int322bytes).reduce((acc,bytes)=>acc.concat(bytes));
+}
 function bytes2hex(arr){
 	return arr.map(x=>x.toString(16).padStart(2,"0")).join("");
+}
 function str2utf8(s){
 	let res=[];
 	let c=s.codePointAt(0);
 	for(let i=0;c!==undefined;i++,c=s.codePointAt(i)){
+	for(let i=0; c!==undefined; i++,c=s.codePointAt(i)){
 		if(c<0x80){res.push(c);}
 		else if(c<0x800){
 			res.push(0b11000000|(c>>>6));
 			res.push(0b10000000|(c&0b111111));
+		}
 		else if(c<0x10000){
 			res.push(0b11100000|(c>>>12));
 			res.push(0b10000000|((c>>>6)&0b111111));
 			res.push(0b10000000|(c&0b111111));
+		}
 		else{
 			res.push(0b11110000|(c>>>18));
 			res.push(0b10000000|((c>>>12)&0b111111));
 			res.push(0b10000000|((c>>>6)&0b111111));
 			res.push(0b10000000|(c&0b111111));
+		}
 		if(c>0xffff){i++;} // skip surrogate
+	}
 	return res;
+}
 /*console.log(str2utf8("$").map(x=>x.toString(16)));
 console.log(str2utf8("¢").map(x=>x.toString(16)));
 console.log(str2utf8("€").map(x=>x.toString(16)));
 console.log(str2utf8("𐍈").map(x=>x.toString(16)));*/
 function utf82str(arr){
 	let res=[];
 	for(let i=0;i<arr.length;i++){
 		let x=arr[i];
 		if(x<=0b1111111){res.push(x);}
 		else if(x<=0b11011111){
 			let a=x&0b11111;
 			let b=arr[++i]&0b111111;
 			res.push(a<<6|b);
+		}
 		else if(x<=0b11101111){
 			let a=x&0b1111;
 			let b=arr[++i]&0b111111;
 			let c=arr[++i]&0b111111;
 			res.push(a<<12|b<<6|c);
+		}
 		else{
 			let a=x&0b111;
 			let b=arr[++i]&0b111111;
 			let c=arr[++i]&0b111111;
 			let d=arr[++i]&0b111111;
 			res.push(a<<18|b<<12|c<<6|d);
+		}
+	}
 	return res.map(x=>String.fromCodePoint(x)).join("");
+}
 if(typeof module!=='undefined'&&module.hasOwnProperty('exports')){
 	module.exports.bytes2int32=bytes2int32;
 	module.exports.bytes2int32s=bytes2int32s;
 	module.exports.int322bytes=int322bytes;
 	module.exports.int32s2bytes=int32s2bytes;
 	module.exports.bytes2hex=bytes2hex;
 	module.exports.str2utf8=str2utf8;
 	module.exports.utf82str=utf82str;
+}

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