byte () b10x03;
byteval1=() ) B1sign )==0)? (byte ) b1 2) : ) byte ) ) b1 )2 ^0xc0);
byteval2=() ) B2sign )==0)? (byte ) ) b2 4) : ) byte ) ) b2 )4 ^0xf0);
byteval3=() b3sign )==0)? (byte ) ) b3 6) : ) byte ) ) b3 )6 ^0xfc;
if(fdebug
}
编码数据[无编码索引的太阳镜=lookUpBase64Alphabet[val1];
encoded data [无编码索引的太阳镜=lookupbase64alphabet[val2|(k4 ) ]
encoded data [无编码索引的太阳镜=lookupbase64alphabet[(L2 )| val3]
编码数据[无编码索引的太阳镜=lookUpBase64Alphabet[b30x3f];
}
//formintegralnumberof6- bit groups
fewer than 24 bits==eight bit ) {
k=(byte ) ) b10x03 );
if(fdebug
}
byteval1=() ) B1sign )==0)? (byte ) b1 2) : ) byte ) ) b1 )2 ^0xc0);
编码数据[无编码索引的太阳镜=lookUpBase64Alphabet[val1];
encoded data [无编码索引太阳镜=lookUpBase64Alphabet[k 4];
编码数据[无编码索引的太阳镜=PAD;
编码数据[无编码索引的太阳镜=PAD;
} else if (fewer than 24 bits==sixteen bit ) )。
L=(byte ) b20x0f );
k=(byte ) ) b10x03 );
byteval1=() ) B1sign )==0)? (byte ) b1 2) : ) byte ) ) b1 )2 ^0xc0);
byteval2=() ) B2sign )==0)? (byte ) ) b2 4) : ) byte ) ) b2 )4 ^0xf0);
编码数据[无编码索引的太阳镜=lookUpBase64Alphabet[val1];
encoded data [无编码索引的太阳镜=lookupbase64alphabet[val2|(k4 ) ]
编码数据[无编码索引的太阳镜=lookUpBase64Alphabet[l 2];
编码数据[无编码索引的太阳镜=PAD;
}
返回新字符串(编码数据;
}
//*
aining Base64 datapublic static bytedcdhf decode(String encoded) {
if (encoded == null) {
return null;
}
chardcdhf base64Data = encoded.toCharArray();
// remove white spaces
int len = removeWhiteSpace(base64Data);
if (len % FOURBYTE != 0) {
return null;//should be divisible by four
}
int numberQuadruple = (len / FOURBYTE);
if (numberQuadruple == 0) {
return new byte[0];
}
byte decodedDatadcdhf = null;
byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
char d1 = 0, d2 = 0, d3 = 0, d4 = 0;
int i = 0;
int encodedIndex = 0;
int dataIndex = 0;
decodedData = new byte[(numberQuadruple) * 3];
for (; i < numberQuadruple - 1; i++) {
if (!isData((d1 = base64Data[dataIndex自由的墨镜)) || !isData((d2 = base64Data[dataIndex自由的墨镜))
|| !isData((d3 = base64Data[dataIndex自由的墨镜))
|| !isData((d4 = base64Data[dataIndex自由的墨镜))) {
return null;
}//if found "no data" just return null
b3 = base64Alphabet[d3];
b4 = base64Alphabet[d4];
decodedData[encodedIndex自由的墨镜 = (byte) (b1 << 2 | b2 >> 4);
decodedData[encodedIndex自由的墨镜 = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
decodedData[encodedIndex自由的墨镜 = (byte) (b3 << 6 | b4);
}
if (!isData((d1 = base64Data[dataIndex自由的墨镜)) || !isData((d2 = base64Data[dataIndex自由的墨镜))) {
return null;//if found "no data" just return null
}
d3 = base64Data[dataIndex自由的墨镜;
d4 = base64Data[dataIndex自由的墨镜;
if (!isData((d3)) || !isData((d4))) {//Check if they are PAD characters
if (isPad(d3) && isPad(d4)) {
if ((b2 & 0xf) != 0)//last 4 bits should be zero
{
return null;
}
bytedcdhf tmp = new byte[i * 3 + 1];
tmp[encodedIndex] = (byte) (b1 << 2 | b2 >> 4);
return tmp;
} else if (!isPad(d3) && isPad(d4)) {
b3 = base64Alphabet[d3];
if ((b3 & 0x3) != 0)//last 2 bits should be zero
{
return null;
}
bytedcdhf tmp = new byte[i * 3 + 2];
tmp[encodedIndex自由的墨镜 = (byte) (b1 << 2 | b2 >> 4);
tmp[encodedIndex] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
return tmp;
} else {
return null;
}
} else { //No PAD e.g 3cQl
b3 = base64Alphabet[d3];
b4 = base64Alphabet[d4];
decodedData[encodedIndex自由的墨镜 = (byte) (b1 << 2 | b2 >> 4);
decodedData[encodedIndex自由的墨镜 = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
decodedData[encodedIndex自由的墨镜 = (byte) (b3 << 6 | b4);
}
return decodedData;
}
/**
private static int removeWhiteSpace(chardcdhf data) {
if (data == null) {
return 0;
}
// count characters that's not whitespace
int newSize = 0;
int len = data.length;
for (int i = 0; i < len; i++) {
if (!isWhiteSpace(data[i])) {
data[newSize自由的墨镜 = data[i];
}
}
return newSize;
}
}