[abdul-rehman]

Originally Posted by jim_yang what should it cover ? It's just a numeral system, nothing to explain on higher than 0x10

Coz i dont get what 0xF0FFF really means (16 * 15 + 0 +15 +15 +15 ? )

[jim_yang]

10111 = 1*10^4 + 0*10^3 + 1*10^2 + 1*10^1 + 1
so
F0FFF you know how to calculate...
just replace 10 with 16

[diablix]

My bad with 0xA

Why easier to convert into binary?

0x13

1 = 0001
3 = 0100

0x12 = 00010100B

[Bugsy]

Originally Posted by nikhilgupta345 Could you explain 'bit masks' a little bit more and the usage in AMXX scripting? Thanks.

There are a number of uses, one example is in my nvault_util include. Reading data from a nvault file requires data types other than 4-byte longs. Since Pawn only has a 4-byte long data-type, bit-masks are needed to get only particular bits\bytes of data (1 or 2 bytes) from the 4-byte long.

PHP Code:

    //4 byte long being read, we use all data so no mask required.
    fread_raw( iVaultHandle , DataBuffer , 1 , BLOCK_INT );
    iTimeStamp = DataBuffer[ 0 ];
    
    //1 byte being read, we only need the first 8 bits (1 byte) of data
    fread_raw( iVaultHandle , DataBuffer , 1 , BLOCK_BYTE );
    iKeyLen = DataBuffer[ 0 ] & 0xFF;

    //2 byte short being read, we only need the first 16 bits (2 bytes) of data    
    fread_raw( iVaultHandle , DataBuffer , 1 , BLOCK_SHORT );
    iValLen = DataBuffer[ 0 ] & 0xFFFF; 


Originally Posted by jim_yang what should it cover ? It's just a numeral system, nothing to explain on higher than 0x10

Originally Posted by jim_yang 10111 = 1*10^4 + 0*10^3 + 1*10^2 + 1*10^1 + 1 so F0FFF you know how to calculate... just replace 10 with 16

There is more that can be explained. He simply says x = 16 and multiply the value in each place by 16. People will be confused and wonder why they cannot calculate numbers.

0xFFF = [ 16 x 16 ] + [ 16 x 16 ] + 16 = 528
0xFFF = 4095

Yes, the same rules apply for all numerical systems but if he is making a tutorial about something he should include how these numbers are calculated (as you did in your above post).

[jim_yang]

concern the example he gave, yes, I should take 90999 as a contrastive example.
I assumed that he can count and understand numerical system...
sorry for that.

[Exolent[jNr]]

Originally Posted by diablix 0x12 = 00010100B

How the hell did you come up with that?

0x12
1 = 0001
2 = 0010
0x12 = 0001 0010

[diablix]

Damn I mean 0x13..

Originally Posted by diablix 0x13 1 = 0001 3 = 0100 0x12 = 00010100B

->

Originally Posted by diablix 0x13 1 = 0001 3 = 0100 0x13 = 0001 0100

[Bugsy]

1 = 0001
3 = 0011
and
0x13 = 10011

I don't understand what youre trying to show.

[fysiks]

Originally Posted by Bugsy 3 = 0011 and 0x13 = 10011 I don't understand what youre trying to show.

He's trying to prove to me that it's easy to convert from hex to binary.

[Exolent[jNr]]

Originally Posted by fysiks He's trying to prove to me that it's easy to convert from hex to binary.

I think he's trying to prove that he doesn't fully understand number systems.