Initial commit

2023-09-28 16:21:06 +08:00
parent 498772eb04
commit ba7be004c0
640 changed files with 87745 additions and 0 deletions
@@ -0,0 +1,110 @@
+/*
+	Modified for Node.js
+	By shaffer
+*/
+/*
+
+https://github.com/esterTion/BiliBili_crc2mid
+
+*/
+var BiliBili_midcrc=function(){
+	'use strict';
+	const CRCPOLYNOMIAL = 0xEDB88320;
+	var startTime=new Date().getTime(),
+	crctable=new Array(256),
+	create_table=function(){
+		var crcreg,
+		i,j;
+		for (i = 0; i < 256; ++i)
+		{
+			crcreg = i;
+			for (j = 0; j < 8; ++j)
+			{
+				if ((crcreg & 1) != 0)
+				{
+					crcreg = CRCPOLYNOMIAL ^ (crcreg >>> 1);
+				}
+				else
+				{
+					crcreg >>>= 1;
+				}
+			}
+			crctable[i] = crcreg;
+		}
+	},
+	crc32=function(input){
+		if(typeof(input)!='string')
+			input=input.toString();
+		var crcstart = 0xFFFFFFFF, len = input.length, index;
+		for(var i=0;i<len;++i){
+			index = (crcstart ^ input.charCodeAt(i)) & 0xff;
+			crcstart = (crcstart >>> 8) ^ crctable[index];
+		}
+		return crcstart;
+	},
+	crc32lastindex=function(input){
+		if(typeof(input)!='string')
+			input=input.toString();
+		var crcstart = 0xFFFFFFFF, len = input.length, index;
+		for(var i=0; i<len;++i){
+			index = (crcstart ^ input.charCodeAt(i)) & 0xff;
+			crcstart = (crcstart >>> 8) ^ crctable[index];
+		}
+		return index;
+	},
+	getcrcindex=function(t){
+		//if(t>0)
+			//t-=256;
+		for(var i=0;i<256;i++){
+			if(crctable[i] >>> 24 == t)
+				return i;
+		}
+		return -1;
+	},
+	deepCheck=function(i, index){
+		var tc=0x00,str='',
+		hash=crc32(i);
+		tc = hash & 0xff ^ index[2];
+		if (!(tc <= 57 && tc >= 48))
+			return [0];
+		str+=tc-48;
+		hash = crctable[index[2]] ^ (hash >>> 8);
+		tc = hash & 0xff ^ index[1];
+		if (!(tc <= 57 && tc >= 48))
+			return [0];
+		str+=tc-48;
+		hash = crctable[index[1]] ^ (hash >>> 8);
+		tc = hash & 0xff ^ index[0];
+		if (!(tc <= 57 && tc >= 48))
+			return [0];
+		str+=tc-48;
+		hash = crctable[index[0]] ^ (hash >>> 8);
+		return [1,str];
+	};
+	create_table();
+	var index=new Array(4);
+	console.log('初始化耗时：'+(new Date().getTime()-startTime)+'ms');
+	return function(input){
+		var ht=parseInt('0x'+input)^0xffffffff,
+		snum,i,lastindex,deepCheckData;
+		for(i=3;i>=0;i--){
+			index[3-i]=getcrcindex( ht >>> (i*8) );
+			snum=crctable[index[3-i]];
+			ht^=snum>>>((3-i)*8);
+		}
+		for(i=0;i<100000000; i++){
+			lastindex = crc32lastindex(i);
+			if(lastindex == index[3]){
+				deepCheckData=deepCheck(i,index)
+				if(deepCheckData[0])
+					break;
+			}
+		}
+
+		if(i==100000000)
+			return -1;
+		console.log('总耗时：'+(new Date().getTime()-startTime)+'ms');
+		return i+''+deepCheckData[1];
+	}
+}
+