Conversion between Qstring,qbytearray and Qbitarray

1:qbitarray2qstring: can also be converted to integral type,

Test program: Test output is the same as the displacement results;

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1. Qbitarray x;
2. int bit;
3. bit = 10;
4. X.resize (32);
6. X.fill (FALSE);
7. X.setbit (bit,true);
8. Qbitarray b;
9. b = This->bitarrayinvert (x);
10. Ui->textedit->setplaintext (this->bitarray2string (b). Toascii ());
11. Qdebug () << (0x1 << bit) <<this->bitarray2string (b) << __file__<<__line__;

Inverted program:

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1. Qbitarray Bitarray2string::bitarrayinvert (Qbitarray array)
2. {
3. Qbitarray temp;
4. Temp.resize (Array.size ());
5. Temp.fill (FALSE);
6. for (int i = 0; i < array.size (); ++i) {
7. if (Array.testbit (i)) {
8. Temp.setbit (Array.size () -1-i,true);
9. }
10. }
11. return temp;
12. }

Conversion program:

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1. qstring bitarray2string::bitarray2string (Qbitarray array)   
2. {   
3.     uint value = 0;  
4.      for  ( uint i = 0; i < array.size (); ++i )  {  
5.         value <<= 1;   
6.         value +=  (int) array.at (i);   
7.     }  
8.     qdebug ()  <<  value <<__file__<<__line__;  //transformation of plastic   
9.      qstring str;  
10.     str.setnum (value, 10);  
11.     return str;  
12. }  

Output Result: 1024 "1024"

2:qbyerarray 2 QString

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1. Qbytearray Z;
2. Z.append (0x68). Append (0x65). Append (0x6c). Append (0x6c). Append (0x6f);
4. Qstring::fromascii (Z.data ());
6. Turn Qbytearray into Qstring,

Output Result: Hello

3:qbytearray to Integer: This is a bitwise operation, it's very useful.

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1. The header file contains:
2. typedef unsigned long U32;
3. The procedure is as follows:
4. Qbytearray Z;
5. Z.resize (1);
6. Z[0] = 0x0f;
8. U32 U1_jzpl_set;
9. U1_jzpl_set = 0;
10. U1_jzpl_set |= ((U32) z.at (0));
11. Qdebug () << "/nu1_jzpl_set" <<U1_JZPL_set;

Output results: 15

Qbytearray to int () direct conversion

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1. int bytestoint (qbytearray bytes) {
2. int addr = bytes[0] & 0x000000ff;
3. Addr |= ((Bytes[1] << 8) & 0x0000FF00);
4. Addr |= ((bytes[2] <<) & 0x00ff0000);
5. Addr |= ((Bytes[3] <<) & 0xff000000);
6. return addr;
7. }

int turn Qbytearray

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1. qbytearray  inttobyte (int number)     
2. {     
3.     qbytearray abyte0;    
4.     abyte0.resize (4);     
5.     abyte0[0]  =  (Uchar)    (0x000000ff & number);     
6.      abyte0[1] =  (Uchar)   ((0x0000ff00 & number)  >> 8 );     
7.     abyte0[2] =  (Uchar)   ((0x00ff0000  & number)  >> 16)     
8.      abyte0[3] =  (Uchar)   ((0xff000000 & number)  >> 24);     
9.     return abyte0;    
10. }  

Qdebug () << inttobyte (252);

Output Result: FC

4: If you want Qbytearray to be converted to Qbitarray, you can try a third method. Personally think Qbitarray is mainly on the bit operation, if interested in friends, can write to see.

Conversion between Qstring,qbytearray and Qbitarray