Convert Hex to SET

Select Tools > Convert Hex to SET from the menu to convert hexadecimal numbers to the equivalent Oberon SET constant notation. This is useful if you are converting programs written in a language like C to Oberon. 

Enter the hexadecimal number, in either Oberon or C format, and click on the Convert button. The corresponding SET constant will be displayed. You can then copy (CTRL-C) the result and paste (CTRL-V) it into your source code. 

Oberon SET Constant Notation

The SET constant notation in Oberon is a convenient way of indicating which bits in the value are set to 1.

• Bit 0 is the least significant bit.
• Bit 31 is the most significant bit.
• 0 is equivalent to the empty set {}.
• If bit n of a number is 1 then n is included in the corresponding SET value.
• Individual bit numbers are separated by commas.
• Ranges of bit numbers from n1 to n2 inclusive are written as n1 .. n2. 

Examples are:

Hex value	Equivalent SET Constant
0	{}
1	{0}
0x0A0A	{1, 3, 9, 11}
0FF0A0AH	{1, 3, 9, 11, 16..23}
0FFFFFFFFH	{0..31}

NOTE: The command silently ignores any characters which are not hexadecimal digits (0 .. 9, a .. f, A .. F). This conveniently allows you to enter values that are written in C style e.g. 0xFFFF.  However, it does mean that you need to take care when entering numbers as it will not warn you of any typing errors (e.g. O instead of 0).

NOTE: The standard Windows shortcut (ALT+F4) can be used to close the Window using the keyboard instead of clicking on the Close Window icon.